src/OpenGL/libGLESv2/Context.cpp

   1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //    http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 // Context.cpp: Implements the es2::Context class, managing all GL state and performing
  16 // rendering operations. It is the GLES2 specific implementation of EGLContext.
  17
  18 #include "Context.h"
  19
  20 #include "main.h"
  21 #include "mathutil.h"
  22 #include "utilities.h"
  23 #include "ResourceManager.h"
  24 #include "Buffer.h"
  25 #include "Fence.h"
  26 #include "Framebuffer.h"
  27 #include "Program.h"
  28 #include "Query.h"
  29 #include "Renderbuffer.h"
  30 #include "Sampler.h"
  31 #include "Shader.h"
  32 #include "Texture.h"
  33 #include "TransformFeedback.h"
  34 #include "VertexArray.h"
  35 #include "VertexDataManager.h"
  36 #include "IndexDataManager.h"
  37 #include "libEGL/Display.h"
  38 #include "common/Surface.hpp"
  39 #include "Common/Half.hpp"
  40
  41 #include <EGL/eglext.h>
  42
  43 #include <algorithm>
  44 #include <string>
  45
  46 namespace es2
  47 {
  48 Context::Context(egl::Display *display, const Context *shareContext, EGLint clientVersion, const egl::Config *config)
  49         : egl::Context(display), clientVersion(clientVersion), config(config)
  50 {
  51         sw::Context *context = new sw::Context();
  52         device = new es2::Device(context);
  53
  54         setClearColor(0.0f, 0.0f, 0.0f, 0.0f);
  55
  56         mState.depthClearValue = 1.0f;
  57         mState.stencilClearValue = 0;
  58
  59         mState.cullFaceEnabled = false;
  60         mState.cullMode = GL_BACK;
  61         mState.frontFace = GL_CCW;
  62         mState.depthTestEnabled = false;
  63         mState.depthFunc = GL_LESS;
  64         mState.blendEnabled = false;
  65         mState.sourceBlendRGB = GL_ONE;
  66         mState.sourceBlendAlpha = GL_ONE;
  67         mState.destBlendRGB = GL_ZERO;
  68         mState.destBlendAlpha = GL_ZERO;
  69         mState.blendEquationRGB = GL_FUNC_ADD;
  70         mState.blendEquationAlpha = GL_FUNC_ADD;
  71         mState.blendColor.red = 0;
  72         mState.blendColor.green = 0;
  73         mState.blendColor.blue = 0;
  74         mState.blendColor.alpha = 0;
  75         mState.stencilTestEnabled = false;
  76         mState.stencilFunc = GL_ALWAYS;
  77         mState.stencilRef = 0;
  78         mState.stencilMask = 0xFFFFFFFFu;
  79         mState.stencilWritemask = 0xFFFFFFFFu;
  80         mState.stencilBackFunc = GL_ALWAYS;
  81         mState.stencilBackRef = 0;
  82         mState.stencilBackMask = 0xFFFFFFFFu;
  83         mState.stencilBackWritemask = 0xFFFFFFFFu;
  84         mState.stencilFail = GL_KEEP;
  85         mState.stencilPassDepthFail = GL_KEEP;
  86         mState.stencilPassDepthPass = GL_KEEP;
  87         mState.stencilBackFail = GL_KEEP;
  88         mState.stencilBackPassDepthFail = GL_KEEP;
  89         mState.stencilBackPassDepthPass = GL_KEEP;
  90         mState.polygonOffsetFillEnabled = false;
  91         mState.polygonOffsetFactor = 0.0f;
  92         mState.polygonOffsetUnits = 0.0f;
  93         mState.sampleAlphaToCoverageEnabled = false;
  94         mState.sampleCoverageEnabled = false;
  95         mState.sampleCoverageValue = 1.0f;
  96         mState.sampleCoverageInvert = false;
  97         mState.scissorTestEnabled = false;
  98         mState.ditherEnabled = true;
  99         mState.primitiveRestartFixedIndexEnabled = false;
 100         mState.rasterizerDiscardEnabled = false;
 101         mState.generateMipmapHint = GL_DONT_CARE;
 102         mState.fragmentShaderDerivativeHint = GL_DONT_CARE;
 103         mState.textureFilteringHint = GL_DONT_CARE;
 104
 105         mState.lineWidth = 1.0f;
 106
 107         mState.viewportX = 0;
 108         mState.viewportY = 0;
 109         mState.viewportWidth = 0;
 110         mState.viewportHeight = 0;
 111         mState.zNear = 0.0f;
 112         mState.zFar = 1.0f;
 113
 114         mState.scissorX = 0;
 115         mState.scissorY = 0;
 116         mState.scissorWidth = 0;
 117         mState.scissorHeight = 0;
 118
 119         mState.colorMaskRed = true;
 120         mState.colorMaskGreen = true;
 121         mState.colorMaskBlue = true;
 122         mState.colorMaskAlpha = true;
 123         mState.depthMask = true;
 124
 125         if(shareContext)
 126         {
 127                 mResourceManager = shareContext->mResourceManager;
 128                 mResourceManager->addRef();
 129         }
 130         else
 131         {
 132                 mResourceManager = new ResourceManager();
 133         }
 134
 135         // [OpenGL ES 2.0.24] section 3.7 page 83:
 136         // In the initial state, TEXTURE_2D and TEXTURE_CUBE_MAP have twodimensional
 137         // and cube map texture state vectors respectively associated with them.
 138         // In order that access to these initial textures not be lost, they are treated as texture
 139         // objects all of whose names are 0.
 140
 141         mTexture2DZero = new Texture2D(0);
 142         mTexture3DZero = new Texture3D(0);
 143         mTexture2DArrayZero = new Texture2DArray(0);
 144         mTextureCubeMapZero = new TextureCubeMap(0);
 145         mTextureExternalZero = new TextureExternal(0);
 146
 147         mState.activeSampler = 0;
 148         bindVertexArray(0);
 149         bindArrayBuffer(0);
 150         bindElementArrayBuffer(0);
 151         bindTextureCubeMap(0);
 152         bindTexture2D(0);
 153         bindReadFramebuffer(0);
 154         bindDrawFramebuffer(0);
 155         bindRenderbuffer(0);
 156         bindGenericUniformBuffer(0);
 157         bindTransformFeedback(0);
 158
 159         mState.currentProgram = 0;
 160
 161         mState.packAlignment = 4;
 162         mState.unpackInfo.alignment = 4;
 163         mState.packRowLength = 0;
 164         mState.packImageHeight = 0;
 165         mState.packSkipPixels = 0;
 166         mState.packSkipRows = 0;
 167         mState.packSkipImages = 0;
 168         mState.unpackInfo.rowLength = 0;
 169         mState.unpackInfo.imageHeight = 0;
 170         mState.unpackInfo.skipPixels = 0;
 171         mState.unpackInfo.skipRows = 0;
 172         mState.unpackInfo.skipImages = 0;
 173
 174         mVertexDataManager = nullptr;
 175         mIndexDataManager = nullptr;
 176
 177         mInvalidEnum = false;
 178         mInvalidValue = false;
 179         mInvalidOperation = false;
 180         mOutOfMemory = false;
 181         mInvalidFramebufferOperation = false;
 182
 183         mHasBeenCurrent = false;
 184
 185         markAllStateDirty();
 186 }
 187
 188 Context::~Context()
 189 {
 190         if(mState.currentProgram != 0)
 191         {
 192                 Program *programObject = mResourceManager->getProgram(mState.currentProgram);
 193                 if(programObject)
 194                 {
 195                         programObject->release();
 196                 }
 197                 mState.currentProgram = 0;
 198         }
 199
 200         while(!mFramebufferNameSpace.empty())
 201         {
 202                 deleteFramebuffer(mFramebufferNameSpace.firstName());
 203         }
 204
 205         while(!mFenceNameSpace.empty())
 206         {
 207                 deleteFence(mFenceNameSpace.firstName());
 208         }
 209
 210         while(!mQueryNameSpace.empty())
 211         {
 212                 deleteQuery(mQueryNameSpace.firstName());
 213         }
 214
 215         while(!mVertexArrayNameSpace.empty())
 216         {
 217                 deleteVertexArray(mVertexArrayNameSpace.lastName());
 218         }
 219
 220         while(!mTransformFeedbackNameSpace.empty())
 221         {
 222                 deleteTransformFeedback(mTransformFeedbackNameSpace.firstName());
 223         }
 224
 225         for(int type = 0; type < TEXTURE_TYPE_COUNT; type++)
 226         {
 227                 for(int sampler = 0; sampler < MAX_COMBINED_TEXTURE_IMAGE_UNITS; sampler++)
 228                 {
 229                         mState.samplerTexture[type][sampler] = nullptr;
 230                 }
 231         }
 232
 233         for(int i = 0; i < MAX_VERTEX_ATTRIBS; i++)
 234         {
 235                 mState.vertexAttribute[i].mBoundBuffer = nullptr;
 236         }
 237
 238         for(int i = 0; i < QUERY_TYPE_COUNT; i++)
 239         {
 240                 mState.activeQuery[i] = nullptr;
 241         }
 242
 243         mState.arrayBuffer = nullptr;
 244         mState.copyReadBuffer = nullptr;
 245         mState.copyWriteBuffer = nullptr;
 246         mState.pixelPackBuffer = nullptr;
 247         mState.pixelUnpackBuffer = nullptr;
 248         mState.genericUniformBuffer = nullptr;
 249
 250         for(int i = 0; i < MAX_UNIFORM_BUFFER_BINDINGS; i++) {
 251                 mState.uniformBuffers[i].set(nullptr, 0, 0);
 252         }
 253
 254         mState.renderbuffer = nullptr;
 255
 256         for(int i = 0; i < MAX_COMBINED_TEXTURE_IMAGE_UNITS; ++i)
 257         {
 258                 mState.sampler[i] = nullptr;
 259         }
 260
 261         mTexture2DZero = nullptr;
 262         mTexture3DZero = nullptr;
 263         mTexture2DArrayZero = nullptr;
 264         mTextureCubeMapZero = nullptr;
 265         mTextureExternalZero = nullptr;
 266
 267         delete mVertexDataManager;
 268         delete mIndexDataManager;
 269
 270         mResourceManager->release();
 271         delete device;
 272 }
 273
 274 void Context::makeCurrent(gl::Surface *surface)
 275 {
 276         if(!mHasBeenCurrent)
 277         {
 278                 mVertexDataManager = new VertexDataManager(this);
 279                 mIndexDataManager = new IndexDataManager();
 280
 281                 mState.viewportX = 0;
 282                 mState.viewportY = 0;
 283                 mState.viewportWidth = surface ? surface->getWidth() : 0;
 284                 mState.viewportHeight = surface ? surface->getHeight() : 0;
 285
 286                 mState.scissorX = 0;
 287                 mState.scissorY = 0;
 288                 mState.scissorWidth = surface ? surface->getWidth() : 0;
 289                 mState.scissorHeight = surface ? surface->getHeight() : 0;
 290
 291                 mHasBeenCurrent = true;
 292         }
 293
 294         if(surface)
 295         {
 296                 // Wrap the existing resources into GL objects and assign them to the '0' names
 297                 egl::Image *defaultRenderTarget = surface->getRenderTarget();
 298                 egl::Image *depthStencil = surface->getDepthStencil();
 299
 300                 Colorbuffer *colorbufferZero = new Colorbuffer(defaultRenderTarget);
 301                 DepthStencilbuffer *depthStencilbufferZero = new DepthStencilbuffer(depthStencil);
 302                 Framebuffer *framebufferZero = new DefaultFramebuffer(colorbufferZero, depthStencilbufferZero);
 303
 304                 setFramebufferZero(framebufferZero);
 305
 306                 if(defaultRenderTarget)
 307                 {
 308                         defaultRenderTarget->release();
 309                 }
 310
 311                 if(depthStencil)
 312                 {
 313                         depthStencil->release();
 314                 }
 315         }
 316         else
 317         {
 318                 setFramebufferZero(nullptr);
 319         }
 320
 321         markAllStateDirty();
 322 }
 323
 324 EGLint Context::getClientVersion() const
 325 {
 326         return clientVersion;
 327 }
 328
 329 EGLint Context::getConfigID() const
 330 {
 331         return config->mConfigID;
 332 }
 333
 334 // This function will set all of the state-related dirty flags, so that all state is set during next pre-draw.
 335 void Context::markAllStateDirty()
 336 {
 337         mAppliedProgramSerial = 0;
 338
 339         mDepthStateDirty = true;
 340         mMaskStateDirty = true;
 341         mBlendStateDirty = true;
 342         mStencilStateDirty = true;
 343         mPolygonOffsetStateDirty = true;
 344         mSampleStateDirty = true;
 345         mDitherStateDirty = true;
 346         mFrontFaceDirty = true;
 347 }
 348
 349 void Context::setClearColor(float red, float green, float blue, float alpha)
 350 {
 351         mState.colorClearValue.red = red;
 352         mState.colorClearValue.green = green;
 353         mState.colorClearValue.blue = blue;
 354         mState.colorClearValue.alpha = alpha;
 355 }
 356
 357 void Context::setClearDepth(float depth)
 358 {
 359         mState.depthClearValue = depth;
 360 }
 361
 362 void Context::setClearStencil(int stencil)
 363 {
 364         mState.stencilClearValue = stencil;
 365 }
 366
 367 void Context::setCullFaceEnabled(bool enabled)
 368 {
 369         mState.cullFaceEnabled = enabled;
 370 }
 371
 372 bool Context::isCullFaceEnabled() const
 373 {
 374         return mState.cullFaceEnabled;
 375 }
 376
 377 void Context::setCullMode(GLenum mode)
 378 {
 379    mState.cullMode = mode;
 380 }
 381
 382 void Context::setFrontFace(GLenum front)
 383 {
 384         if(mState.frontFace != front)
 385         {
 386                 mState.frontFace = front;
 387                 mFrontFaceDirty = true;
 388         }
 389 }
 390
 391 void Context::setDepthTestEnabled(bool enabled)
 392 {
 393         if(mState.depthTestEnabled != enabled)
 394         {
 395                 mState.depthTestEnabled = enabled;
 396                 mDepthStateDirty = true;
 397         }
 398 }
 399
 400 bool Context::isDepthTestEnabled() const
 401 {
 402         return mState.depthTestEnabled;
 403 }
 404
 405 void Context::setDepthFunc(GLenum depthFunc)
 406 {
 407         if(mState.depthFunc != depthFunc)
 408         {
 409                 mState.depthFunc = depthFunc;
 410                 mDepthStateDirty = true;
 411         }
 412 }
 413
 414 void Context::setDepthRange(float zNear, float zFar)
 415 {
 416         mState.zNear = zNear;
 417         mState.zFar = zFar;
 418 }
 419
 420 void Context::setBlendEnabled(bool enabled)
 421 {
 422         if(mState.blendEnabled != enabled)
 423         {
 424                 mState.blendEnabled = enabled;
 425                 mBlendStateDirty = true;
 426         }
 427 }
 428
 429 bool Context::isBlendEnabled() const
 430 {
 431         return mState.blendEnabled;
 432 }
 433
 434 void Context::setBlendFactors(GLenum sourceRGB, GLenum destRGB, GLenum sourceAlpha, GLenum destAlpha)
 435 {
 436         if(mState.sourceBlendRGB != sourceRGB ||
 437            mState.sourceBlendAlpha != sourceAlpha ||
 438            mState.destBlendRGB != destRGB ||
 439            mState.destBlendAlpha != destAlpha)
 440         {
 441                 mState.sourceBlendRGB = sourceRGB;
 442                 mState.destBlendRGB = destRGB;
 443                 mState.sourceBlendAlpha = sourceAlpha;
 444                 mState.destBlendAlpha = destAlpha;
 445                 mBlendStateDirty = true;
 446         }
 447 }
 448
 449 void Context::setBlendColor(float red, float green, float blue, float alpha)
 450 {
 451         if(mState.blendColor.red != red ||
 452            mState.blendColor.green != green ||
 453            mState.blendColor.blue != blue ||
 454            mState.blendColor.alpha != alpha)
 455         {
 456                 mState.blendColor.red = red;
 457                 mState.blendColor.green = green;
 458                 mState.blendColor.blue = blue;
 459                 mState.blendColor.alpha = alpha;
 460                 mBlendStateDirty = true;
 461         }
 462 }
 463
 464 void Context::setBlendEquation(GLenum rgbEquation, GLenum alphaEquation)
 465 {
 466         if(mState.blendEquationRGB != rgbEquation ||
 467            mState.blendEquationAlpha != alphaEquation)
 468         {
 469                 mState.blendEquationRGB = rgbEquation;
 470                 mState.blendEquationAlpha = alphaEquation;
 471                 mBlendStateDirty = true;
 472         }
 473 }
 474
 475 void Context::setStencilTestEnabled(bool enabled)
 476 {
 477         if(mState.stencilTestEnabled != enabled)
 478         {
 479                 mState.stencilTestEnabled = enabled;
 480                 mStencilStateDirty = true;
 481         }
 482 }
 483
 484 bool Context::isStencilTestEnabled() const
 485 {
 486         return mState.stencilTestEnabled;
 487 }
 488
 489 void Context::setStencilParams(GLenum stencilFunc, GLint stencilRef, GLuint stencilMask)
 490 {
 491         if(mState.stencilFunc != stencilFunc ||
 492            mState.stencilRef != stencilRef ||
 493            mState.stencilMask != stencilMask)
 494         {
 495                 mState.stencilFunc = stencilFunc;
 496                 mState.stencilRef = (stencilRef > 0) ? stencilRef : 0;
 497                 mState.stencilMask = stencilMask;
 498                 mStencilStateDirty = true;
 499         }
 500 }
 501
 502 void Context::setStencilBackParams(GLenum stencilBackFunc, GLint stencilBackRef, GLuint stencilBackMask)
 503 {
 504         if(mState.stencilBackFunc != stencilBackFunc ||
 505            mState.stencilBackRef != stencilBackRef ||
 506            mState.stencilBackMask != stencilBackMask)
 507         {
 508                 mState.stencilBackFunc = stencilBackFunc;
 509                 mState.stencilBackRef = (stencilBackRef > 0) ? stencilBackRef : 0;
 510                 mState.stencilBackMask = stencilBackMask;
 511                 mStencilStateDirty = true;
 512         }
 513 }
 514
 515 void Context::setStencilWritemask(GLuint stencilWritemask)
 516 {
 517         if(mState.stencilWritemask != stencilWritemask)
 518         {
 519                 mState.stencilWritemask = stencilWritemask;
 520                 mStencilStateDirty = true;
 521         }
 522 }
 523
 524 void Context::setStencilBackWritemask(GLuint stencilBackWritemask)
 525 {
 526         if(mState.stencilBackWritemask != stencilBackWritemask)
 527         {
 528                 mState.stencilBackWritemask = stencilBackWritemask;
 529                 mStencilStateDirty = true;
 530         }
 531 }
 532
 533 void Context::setStencilOperations(GLenum stencilFail, GLenum stencilPassDepthFail, GLenum stencilPassDepthPass)
 534 {
 535         if(mState.stencilFail != stencilFail ||
 536            mState.stencilPassDepthFail != stencilPassDepthFail ||
 537            mState.stencilPassDepthPass != stencilPassDepthPass)
 538         {
 539                 mState.stencilFail = stencilFail;
 540                 mState.stencilPassDepthFail = stencilPassDepthFail;
 541                 mState.stencilPassDepthPass = stencilPassDepthPass;
 542                 mStencilStateDirty = true;
 543         }
 544 }
 545
 546 void Context::setStencilBackOperations(GLenum stencilBackFail, GLenum stencilBackPassDepthFail, GLenum stencilBackPassDepthPass)
 547 {
 548         if(mState.stencilBackFail != stencilBackFail ||
 549            mState.stencilBackPassDepthFail != stencilBackPassDepthFail ||
 550            mState.stencilBackPassDepthPass != stencilBackPassDepthPass)
 551         {
 552                 mState.stencilBackFail = stencilBackFail;
 553                 mState.stencilBackPassDepthFail = stencilBackPassDepthFail;
 554                 mState.stencilBackPassDepthPass = stencilBackPassDepthPass;
 555                 mStencilStateDirty = true;
 556         }
 557 }
 558
 559 void Context::setPolygonOffsetFillEnabled(bool enabled)
 560 {
 561         if(mState.polygonOffsetFillEnabled != enabled)
 562         {
 563                 mState.polygonOffsetFillEnabled = enabled;
 564                 mPolygonOffsetStateDirty = true;
 565         }
 566 }
 567
 568 bool Context::isPolygonOffsetFillEnabled() const
 569 {
 570         return mState.polygonOffsetFillEnabled;
 571 }
 572
 573 void Context::setPolygonOffsetParams(GLfloat factor, GLfloat units)
 574 {
 575         if(mState.polygonOffsetFactor != factor ||
 576            mState.polygonOffsetUnits != units)
 577         {
 578                 mState.polygonOffsetFactor = factor;
 579                 mState.polygonOffsetUnits = units;
 580                 mPolygonOffsetStateDirty = true;
 581         }
 582 }
 583
 584 void Context::setSampleAlphaToCoverageEnabled(bool enabled)
 585 {
 586         if(mState.sampleAlphaToCoverageEnabled != enabled)
 587         {
 588                 mState.sampleAlphaToCoverageEnabled = enabled;
 589                 mSampleStateDirty = true;
 590         }
 591 }
 592
 593 bool Context::isSampleAlphaToCoverageEnabled() const
 594 {
 595         return mState.sampleAlphaToCoverageEnabled;
 596 }
 597
 598 void Context::setSampleCoverageEnabled(bool enabled)
 599 {
 600         if(mState.sampleCoverageEnabled != enabled)
 601         {
 602                 mState.sampleCoverageEnabled = enabled;
 603                 mSampleStateDirty = true;
 604         }
 605 }
 606
 607 bool Context::isSampleCoverageEnabled() const
 608 {
 609         return mState.sampleCoverageEnabled;
 610 }
 611
 612 void Context::setSampleCoverageParams(GLclampf value, bool invert)
 613 {
 614         if(mState.sampleCoverageValue != value ||
 615            mState.sampleCoverageInvert != invert)
 616         {
 617                 mState.sampleCoverageValue = value;
 618                 mState.sampleCoverageInvert = invert;
 619                 mSampleStateDirty = true;
 620         }
 621 }
 622
 623 void Context::setScissorTestEnabled(bool enabled)
 624 {
 625         mState.scissorTestEnabled = enabled;
 626 }
 627
 628 bool Context::isScissorTestEnabled() const
 629 {
 630         return mState.scissorTestEnabled;
 631 }
 632
 633 void Context::setDitherEnabled(bool enabled)
 634 {
 635         if(mState.ditherEnabled != enabled)
 636         {
 637                 mState.ditherEnabled = enabled;
 638                 mDitherStateDirty = true;
 639         }
 640 }
 641
 642 bool Context::isDitherEnabled() const
 643 {
 644         return mState.ditherEnabled;
 645 }
 646
 647 void Context::setPrimitiveRestartFixedIndexEnabled(bool enabled)
 648 {
 649         mState.primitiveRestartFixedIndexEnabled = enabled;
 650 }
 651
 652 bool Context::isPrimitiveRestartFixedIndexEnabled() const
 653 {
 654         return mState.primitiveRestartFixedIndexEnabled;
 655 }
 656
 657 void Context::setRasterizerDiscardEnabled(bool enabled)
 658 {
 659         mState.rasterizerDiscardEnabled = enabled;
 660 }
 661
 662 bool Context::isRasterizerDiscardEnabled() const
 663 {
 664         return mState.rasterizerDiscardEnabled;
 665 }
 666
 667 void Context::setLineWidth(GLfloat width)
 668 {
 669         mState.lineWidth = width;
 670         device->setLineWidth(clamp(width, ALIASED_LINE_WIDTH_RANGE_MIN, ALIASED_LINE_WIDTH_RANGE_MAX));
 671 }
 672
 673 void Context::setGenerateMipmapHint(GLenum hint)
 674 {
 675         mState.generateMipmapHint = hint;
 676 }
 677
 678 void Context::setFragmentShaderDerivativeHint(GLenum hint)
 679 {
 680         mState.fragmentShaderDerivativeHint = hint;
 681         // TODO: Propagate the hint to shader translator so we can write
 682         // ddx, ddx_coarse, or ddx_fine depending on the hint.
 683         // Ignore for now. It is valid for implementations to ignore hint.
 684 }
 685
 686 void Context::setTextureFilteringHint(GLenum hint)
 687 {
 688         mState.textureFilteringHint = hint;
 689 }
 690
 691 void Context::setViewportParams(GLint x, GLint y, GLsizei width, GLsizei height)
 692 {
 693         mState.viewportX = x;
 694         mState.viewportY = y;
 695         mState.viewportWidth = std::min<GLsizei>(width, IMPLEMENTATION_MAX_RENDERBUFFER_SIZE);     // GL_MAX_VIEWPORT_DIMS[0]
 696         mState.viewportHeight = std::min<GLsizei>(height, IMPLEMENTATION_MAX_RENDERBUFFER_SIZE);   // GL_MAX_VIEWPORT_DIMS[1]
 697 }
 698
 699 void Context::setScissorParams(GLint x, GLint y, GLsizei width, GLsizei height)
 700 {
 701         mState.scissorX = x;
 702         mState.scissorY = y;
 703         mState.scissorWidth = width;
 704         mState.scissorHeight = height;
 705 }
 706
 707 void Context::setColorMask(bool red, bool green, bool blue, bool alpha)
 708 {
 709         if(mState.colorMaskRed != red || mState.colorMaskGreen != green ||
 710            mState.colorMaskBlue != blue || mState.colorMaskAlpha != alpha)
 711         {
 712                 mState.colorMaskRed = red;
 713                 mState.colorMaskGreen = green;
 714                 mState.colorMaskBlue = blue;
 715                 mState.colorMaskAlpha = alpha;
 716                 mMaskStateDirty = true;
 717         }
 718 }
 719
 720 unsigned int Context::getColorMask() const
 721 {
 722         return (mState.colorMaskRed ? 0x1 : 0) |
 723                (mState.colorMaskGreen ? 0x2 : 0) |
 724                (mState.colorMaskBlue ? 0x4 : 0) |
 725                (mState.colorMaskAlpha ? 0x8 : 0);
 726 }
 727
 728 void Context::setDepthMask(bool mask)
 729 {
 730         if(mState.depthMask != mask)
 731         {
 732                 mState.depthMask = mask;
 733                 mMaskStateDirty = true;
 734         }
 735 }
 736
 737 void Context::setActiveSampler(unsigned int active)
 738 {
 739         mState.activeSampler = active;
 740 }
 741
 742 GLuint Context::getReadFramebufferName() const
 743 {
 744         return mState.readFramebuffer;
 745 }
 746
 747 GLuint Context::getDrawFramebufferName() const
 748 {
 749         return mState.drawFramebuffer;
 750 }
 751
 752 GLuint Context::getRenderbufferName() const
 753 {
 754         return mState.renderbuffer.name();
 755 }
 756
 757 void Context::setFramebufferReadBuffer(GLuint buf)
 758 {
 759         getReadFramebuffer()->setReadBuffer(buf);
 760 }
 761
 762 void Context::setFramebufferDrawBuffers(GLsizei n, const GLenum *bufs)
 763 {
 764         Framebuffer *drawFramebuffer = getDrawFramebuffer();
 765
 766         for(int i = 0; i < MAX_COLOR_ATTACHMENTS; i++)
 767         {
 768                 drawFramebuffer->setDrawBuffer(i, (i < n) ? bufs[i] : GL_NONE);
 769         }
 770 }
 771
 772 GLuint Context::getReadFramebufferColorIndex() const
 773 {
 774         GLenum buf = getReadFramebuffer()->getReadBuffer();
 775         switch(buf)
 776         {
 777         case GL_BACK:
 778                 return 0;
 779         case GL_NONE:
 780                 return GL_INVALID_INDEX;
 781         default:
 782                 return buf - GL_COLOR_ATTACHMENT0;
 783 }
 784 }
 785
 786 GLuint Context::getArrayBufferName() const
 787 {
 788         return mState.arrayBuffer.name();
 789 }
 790
 791 GLuint Context::getElementArrayBufferName() const
 792 {
 793         Buffer* elementArrayBuffer = getCurrentVertexArray()->getElementArrayBuffer();
 794         return elementArrayBuffer ? elementArrayBuffer->name : 0;
 795 }
 796
 797 GLuint Context::getActiveQuery(GLenum target) const
 798 {
 799         Query *queryObject = nullptr;
 800
 801         switch(target)
 802         {
 803         case GL_ANY_SAMPLES_PASSED_EXT:
 804                 queryObject = mState.activeQuery[QUERY_ANY_SAMPLES_PASSED];
 805                 break;
 806         case GL_ANY_SAMPLES_PASSED_CONSERVATIVE_EXT:
 807                 queryObject = mState.activeQuery[QUERY_ANY_SAMPLES_PASSED_CONSERVATIVE];
 808                 break;
 809         case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
 810                 queryObject = mState.activeQuery[QUERY_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN];
 811                 break;
 812         default:
 813                 ASSERT(false);
 814         }
 815
 816         if(queryObject)
 817         {
 818                 return queryObject->name;
 819         }
 820
 821         return 0;
 822 }
 823
 824 void Context::setVertexAttribArrayEnabled(unsigned int attribNum, bool enabled)
 825 {
 826         getCurrentVertexArray()->enableAttribute(attribNum, enabled);
 827 }
 828
 829 void Context::setVertexAttribDivisor(unsigned int attribNum, GLuint divisor)
 830 {
 831         getCurrentVertexArray()->setVertexAttribDivisor(attribNum, divisor);
 832 }
 833
 834 const VertexAttribute &Context::getVertexAttribState(unsigned int attribNum) const
 835 {
 836         return getCurrentVertexArray()->getVertexAttribute(attribNum);
 837 }
 838
 839 void Context::setVertexAttribState(unsigned int attribNum, Buffer *boundBuffer, GLint size, GLenum type, bool normalized,
 840                                    GLsizei stride, const void *pointer)
 841 {
 842         getCurrentVertexArray()->setAttributeState(attribNum, boundBuffer, size, type, normalized, stride, pointer);
 843 }
 844
 845 const void *Context::getVertexAttribPointer(unsigned int attribNum) const
 846 {
 847         return getCurrentVertexArray()->getVertexAttribute(attribNum).mPointer;
 848 }
 849
 850 const VertexAttributeArray &Context::getVertexArrayAttributes()
 851 {
 852         return getCurrentVertexArray()->getVertexAttributes();
 853 }
 854
 855 const VertexAttributeArray &Context::getCurrentVertexAttributes()
 856 {
 857         return mState.vertexAttribute;
 858 }
 859
 860 void Context::setPackAlignment(GLint alignment)
 861 {
 862         mState.packAlignment = alignment;
 863 }
 864
 865 void Context::setUnpackAlignment(GLint alignment)
 866 {
 867         mState.unpackInfo.alignment = alignment;
 868 }
 869
 870 const egl::Image::UnpackInfo& Context::getUnpackInfo() const
 871 {
 872         return mState.unpackInfo;
 873 }
 874
 875 void Context::setPackRowLength(GLint rowLength)
 876 {
 877         mState.packRowLength = rowLength;
 878 }
 879
 880 void Context::setPackImageHeight(GLint imageHeight)
 881 {
 882         mState.packImageHeight = imageHeight;
 883 }
 884
 885 void Context::setPackSkipPixels(GLint skipPixels)
 886 {
 887         mState.packSkipPixels = skipPixels;
 888 }
 889
 890 void Context::setPackSkipRows(GLint skipRows)
 891 {
 892         mState.packSkipRows = skipRows;
 893 }
 894
 895 void Context::setPackSkipImages(GLint skipImages)
 896 {
 897         mState.packSkipImages = skipImages;
 898 }
 899
 900 void Context::setUnpackRowLength(GLint rowLength)
 901 {
 902         mState.unpackInfo.rowLength = rowLength;
 903 }
 904
 905 void Context::setUnpackImageHeight(GLint imageHeight)
 906 {
 907         mState.unpackInfo.imageHeight = imageHeight;
 908 }
 909
 910 void Context::setUnpackSkipPixels(GLint skipPixels)
 911 {
 912         mState.unpackInfo.skipPixels = skipPixels;
 913 }
 914
 915 void Context::setUnpackSkipRows(GLint skipRows)
 916 {
 917         mState.unpackInfo.skipRows = skipRows;
 918 }
 919
 920 void Context::setUnpackSkipImages(GLint skipImages)
 921 {
 922         mState.unpackInfo.skipImages = skipImages;
 923 }
 924
 925 GLuint Context::createBuffer()
 926 {
 927         return mResourceManager->createBuffer();
 928 }
 929
 930 GLuint Context::createProgram()
 931 {
 932         return mResourceManager->createProgram();
 933 }
 934
 935 GLuint Context::createShader(GLenum type)
 936 {
 937         return mResourceManager->createShader(type);
 938 }
 939
 940 GLuint Context::createTexture()
 941 {
 942         return mResourceManager->createTexture();
 943 }
 944
 945 GLuint Context::createRenderbuffer()
 946 {
 947         return mResourceManager->createRenderbuffer();
 948 }
 949
 950 // Returns an unused framebuffer name
 951 GLuint Context::createFramebuffer()
 952 {
 953         return mFramebufferNameSpace.allocate();
 954 }
 955
 956 GLuint Context::createFence()
 957 {
 958         return mFenceNameSpace.allocate(new Fence());
 959 }
 960
 961 // Returns an unused query name
 962 GLuint Context::createQuery()
 963 {
 964         return mQueryNameSpace.allocate();
 965 }
 966
 967 // Returns an unused vertex array name
 968 GLuint Context::createVertexArray()
 969 {
 970         return mVertexArrayNameSpace.allocate();
 971 }
 972
 973 GLsync Context::createFenceSync(GLenum condition, GLbitfield flags)
 974 {
 975         GLuint handle = mResourceManager->createFenceSync(condition, flags);
 976
 977         return reinterpret_cast<GLsync>(static_cast<uintptr_t>(handle));
 978 }
 979
 980 // Returns an unused transform feedback name
 981 GLuint Context::createTransformFeedback()
 982 {
 983         return mTransformFeedbackNameSpace.allocate();
 984 }
 985
 986 // Returns an unused sampler name
 987 GLuint Context::createSampler()
 988 {
 989         return mResourceManager->createSampler();
 990 }
 991
 992 void Context::deleteBuffer(GLuint buffer)
 993 {
 994         detachBuffer(buffer);
 995
 996         mResourceManager->deleteBuffer(buffer);
 997 }
 998
 999 void Context::deleteShader(GLuint shader)
1000 {
1001         mResourceManager->deleteShader(shader);
1002 }
1003
1004 void Context::deleteProgram(GLuint program)
1005 {
1006         mResourceManager->deleteProgram(program);
1007 }
1008
1009 void Context::deleteTexture(GLuint texture)
1010 {
1011         detachTexture(texture);
1012
1013         mResourceManager->deleteTexture(texture);
1014 }
1015
1016 void Context::deleteRenderbuffer(GLuint renderbuffer)
1017 {
1018         if(mResourceManager->getRenderbuffer(renderbuffer))
1019         {
1020                 detachRenderbuffer(renderbuffer);
1021         }
1022
1023         mResourceManager->deleteRenderbuffer(renderbuffer);
1024 }
1025
1026 void Context::deleteFramebuffer(GLuint framebuffer)
1027 {
1028         detachFramebuffer(framebuffer);
1029
1030         Framebuffer *framebufferObject = mFramebufferNameSpace.remove(framebuffer);
1031
1032         if(framebufferObject)
1033         {
1034                 delete framebufferObject;
1035         }
1036 }
1037
1038 void Context::deleteFence(GLuint fence)
1039 {
1040         Fence *fenceObject = mFenceNameSpace.remove(fence);
1041
1042         if(fenceObject)
1043         {
1044                 delete fenceObject;
1045         }
1046 }
1047
1048 void Context::deleteQuery(GLuint query)
1049 {
1050         Query *queryObject = mQueryNameSpace.remove(query);
1051
1052         if(queryObject)
1053         {
1054                 queryObject->release();
1055         }
1056 }
1057
1058 void Context::deleteVertexArray(GLuint vertexArray)
1059 {
1060         // [OpenGL ES 3.0.2] section 2.10 page 43:
1061         // If a vertex array object that is currently bound is deleted, the binding
1062         // for that object reverts to zero and the default vertex array becomes current.
1063         if(getCurrentVertexArray()->name == vertexArray)
1064         {
1065                 bindVertexArray(0);
1066         }
1067
1068         VertexArray *vertexArrayObject = mVertexArrayNameSpace.remove(vertexArray);
1069
1070         if(vertexArrayObject)
1071         {
1072                 delete vertexArrayObject;
1073         }
1074 }
1075
1076 void Context::deleteFenceSync(GLsync fenceSync)
1077 {
1078         // The spec specifies the underlying Fence object is not deleted until all current
1079         // wait commands finish. However, since the name becomes invalid, we cannot query the fence,
1080         // and since our API is currently designed for being called from a single thread, we can delete
1081         // the fence immediately.
1082         mResourceManager->deleteFenceSync(static_cast<GLuint>(reinterpret_cast<uintptr_t>(fenceSync)));
1083 }
1084
1085 void Context::deleteTransformFeedback(GLuint transformFeedback)
1086 {
1087         TransformFeedback *transformFeedbackObject = mTransformFeedbackNameSpace.remove(transformFeedback);
1088
1089         if(transformFeedbackObject)
1090         {
1091                 delete transformFeedbackObject;
1092         }
1093 }
1094
1095 void Context::deleteSampler(GLuint sampler)
1096 {
1097         detachSampler(sampler);
1098
1099         mResourceManager->deleteSampler(sampler);
1100 }
1101
1102 Buffer *Context::getBuffer(GLuint handle) const
1103 {
1104         return mResourceManager->getBuffer(handle);
1105 }
1106
1107 Shader *Context::getShader(GLuint handle) const
1108 {
1109         return mResourceManager->getShader(handle);
1110 }
1111
1112 Program *Context::getProgram(GLuint handle) const
1113 {
1114         return mResourceManager->getProgram(handle);
1115 }
1116
1117 Texture *Context::getTexture(GLuint handle) const
1118 {
1119         return mResourceManager->getTexture(handle);
1120 }
1121
1122 Renderbuffer *Context::getRenderbuffer(GLuint handle) const
1123 {
1124         return mResourceManager->getRenderbuffer(handle);
1125 }
1126
1127 Framebuffer *Context::getReadFramebuffer() const
1128 {
1129         return getFramebuffer(mState.readFramebuffer);
1130 }
1131
1132 Framebuffer *Context::getDrawFramebuffer() const
1133 {
1134         return getFramebuffer(mState.drawFramebuffer);
1135 }
1136
1137 void Context::bindArrayBuffer(unsigned int buffer)
1138 {
1139         mResourceManager->checkBufferAllocation(buffer);
1140
1141         mState.arrayBuffer = getBuffer(buffer);
1142 }
1143
1144 void Context::bindElementArrayBuffer(unsigned int buffer)
1145 {
1146         mResourceManager->checkBufferAllocation(buffer);
1147
1148         getCurrentVertexArray()->setElementArrayBuffer(getBuffer(buffer));
1149 }
1150
1151 void Context::bindCopyReadBuffer(GLuint buffer)
1152 {
1153         mResourceManager->checkBufferAllocation(buffer);
1154
1155         mState.copyReadBuffer = getBuffer(buffer);
1156 }
1157
1158 void Context::bindCopyWriteBuffer(GLuint buffer)
1159 {
1160         mResourceManager->checkBufferAllocation(buffer);
1161
1162         mState.copyWriteBuffer = getBuffer(buffer);
1163 }
1164
1165 void Context::bindPixelPackBuffer(GLuint buffer)
1166 {
1167         mResourceManager->checkBufferAllocation(buffer);
1168
1169         mState.pixelPackBuffer = getBuffer(buffer);
1170 }
1171
1172 void Context::bindPixelUnpackBuffer(GLuint buffer)
1173 {
1174         mResourceManager->checkBufferAllocation(buffer);
1175
1176         mState.pixelUnpackBuffer = getBuffer(buffer);
1177 }
1178
1179 void Context::bindTransformFeedbackBuffer(GLuint buffer)
1180 {
1181         mResourceManager->checkBufferAllocation(buffer);
1182
1183         TransformFeedback* transformFeedback = getTransformFeedback(mState.transformFeedback);
1184
1185         if(transformFeedback)
1186         {
1187                 transformFeedback->setGenericBuffer(getBuffer(buffer));
1188         }
1189 }
1190
1191 void Context::bindTexture2D(GLuint texture)
1192 {
1193         mResourceManager->checkTextureAllocation(texture, TEXTURE_2D);
1194
1195         mState.samplerTexture[TEXTURE_2D][mState.activeSampler] = getTexture(texture);
1196 }
1197
1198 void Context::bindTextureCubeMap(GLuint texture)
1199 {
1200         mResourceManager->checkTextureAllocation(texture, TEXTURE_CUBE);
1201
1202         mState.samplerTexture[TEXTURE_CUBE][mState.activeSampler] = getTexture(texture);
1203 }
1204
1205 void Context::bindTextureExternal(GLuint texture)
1206 {
1207         mResourceManager->checkTextureAllocation(texture, TEXTURE_EXTERNAL);
1208
1209         mState.samplerTexture[TEXTURE_EXTERNAL][mState.activeSampler] = getTexture(texture);
1210 }
1211
1212 void Context::bindTexture3D(GLuint texture)
1213 {
1214         mResourceManager->checkTextureAllocation(texture, TEXTURE_3D);
1215
1216         mState.samplerTexture[TEXTURE_3D][mState.activeSampler] = getTexture(texture);
1217 }
1218
1219 void Context::bindTexture2DArray(GLuint texture)
1220 {
1221         mResourceManager->checkTextureAllocation(texture, TEXTURE_2D_ARRAY);
1222
1223         mState.samplerTexture[TEXTURE_2D_ARRAY][mState.activeSampler] = getTexture(texture);
1224 }
1225
1226 void Context::bindReadFramebuffer(GLuint framebuffer)
1227 {
1228         if(!getFramebuffer(framebuffer))
1229         {
1230                 mFramebufferNameSpace.insert(framebuffer, new Framebuffer());
1231         }
1232
1233         mState.readFramebuffer = framebuffer;
1234 }
1235
1236 void Context::bindDrawFramebuffer(GLuint framebuffer)
1237 {
1238         if(!getFramebuffer(framebuffer))
1239         {
1240                 mFramebufferNameSpace.insert(framebuffer, new Framebuffer());
1241         }
1242
1243         mState.drawFramebuffer = framebuffer;
1244 }
1245
1246 void Context::bindRenderbuffer(GLuint renderbuffer)
1247 {
1248         mResourceManager->checkRenderbufferAllocation(renderbuffer);
1249
1250         mState.renderbuffer = getRenderbuffer(renderbuffer);
1251 }
1252
1253 void Context::bindVertexArray(GLuint array)
1254 {
1255         VertexArray *vertexArray = getVertexArray(array);
1256
1257         if(!vertexArray)
1258         {
1259                 vertexArray = new VertexArray(array);
1260                 mVertexArrayNameSpace.insert(array, vertexArray);
1261         }
1262
1263         mState.vertexArray = array;
1264 }
1265
1266 void Context::bindGenericUniformBuffer(GLuint buffer)
1267 {
1268         mResourceManager->checkBufferAllocation(buffer);
1269
1270         mState.genericUniformBuffer = getBuffer(buffer);
1271 }
1272
1273 void Context::bindIndexedUniformBuffer(GLuint buffer, GLuint index, GLintptr offset, GLsizeiptr size)
1274 {
1275         mResourceManager->checkBufferAllocation(buffer);
1276
1277         Buffer* bufferObject = getBuffer(buffer);
1278         mState.uniformBuffers[index].set(bufferObject, static_cast<int>(offset), static_cast<int>(size));
1279 }
1280
1281 void Context::bindGenericTransformFeedbackBuffer(GLuint buffer)
1282 {
1283         mResourceManager->checkBufferAllocation(buffer);
1284
1285         getTransformFeedback()->setGenericBuffer(getBuffer(buffer));
1286 }
1287
1288 void Context::bindIndexedTransformFeedbackBuffer(GLuint buffer, GLuint index, GLintptr offset, GLsizeiptr size)
1289 {
1290         mResourceManager->checkBufferAllocation(buffer);
1291
1292         Buffer* bufferObject = getBuffer(buffer);
1293         getTransformFeedback()->setBuffer(index, bufferObject, offset, size);
1294 }
1295
1296 void Context::bindTransformFeedback(GLuint id)
1297 {
1298         if(!getTransformFeedback(id))
1299         {
1300                 mTransformFeedbackNameSpace.insert(id, new TransformFeedback(id));
1301         }
1302
1303         mState.transformFeedback = id;
1304 }
1305
1306 bool Context::bindSampler(GLuint unit, GLuint sampler)
1307 {
1308         mResourceManager->checkSamplerAllocation(sampler);
1309
1310         Sampler* samplerObject = getSampler(sampler);
1311
1312         mState.sampler[unit] = samplerObject;
1313
1314         return !!samplerObject;
1315 }
1316
1317 void Context::useProgram(GLuint program)
1318 {
1319         GLuint priorProgram = mState.currentProgram;
1320         mState.currentProgram = program;               // Must switch before trying to delete, otherwise it only gets flagged.
1321
1322         if(priorProgram != program)
1323         {
1324                 Program *newProgram = mResourceManager->getProgram(program);
1325                 Program *oldProgram = mResourceManager->getProgram(priorProgram);
1326
1327                 if(newProgram)
1328                 {
1329                         newProgram->addRef();
1330                 }
1331
1332                 if(oldProgram)
1333                 {
1334                         oldProgram->release();
1335                 }
1336         }
1337 }
1338
1339 void Context::beginQuery(GLenum target, GLuint query)
1340 {
1341         // From EXT_occlusion_query_boolean: If BeginQueryEXT is called with an <id>
1342         // of zero, if the active query object name for <target> is non-zero (for the
1343         // targets ANY_SAMPLES_PASSED_EXT and ANY_SAMPLES_PASSED_CONSERVATIVE_EXT, if
1344         // the active query for either target is non-zero), if <id> is the name of an
1345         // existing query object whose type does not match <target>, or if <id> is the
1346         // active query object name for any query type, the error INVALID_OPERATION is
1347         // generated.
1348
1349         // Ensure no other queries are active
1350         // NOTE: If other queries than occlusion are supported, we will need to check
1351         // separately that:
1352         //    a) The query ID passed is not the current active query for any target/type
1353         //    b) There are no active queries for the requested target (and in the case
1354         //       of GL_ANY_SAMPLES_PASSED_EXT and GL_ANY_SAMPLES_PASSED_CONSERVATIVE_EXT,
1355         //       no query may be active for either if glBeginQuery targets either.
1356         for(int i = 0; i < QUERY_TYPE_COUNT; i++)
1357         {
1358                 if(mState.activeQuery[i])
1359                 {
1360                         return error(GL_INVALID_OPERATION);
1361                 }
1362         }
1363
1364         QueryType qType;
1365         switch(target)
1366         {
1367         case GL_ANY_SAMPLES_PASSED_EXT:
1368                 qType = QUERY_ANY_SAMPLES_PASSED;
1369                 break;
1370         case GL_ANY_SAMPLES_PASSED_CONSERVATIVE_EXT:
1371                 qType = QUERY_ANY_SAMPLES_PASSED_CONSERVATIVE;
1372                 break;
1373         case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
1374                 qType = QUERY_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN;
1375                 break;
1376         default:
1377                 UNREACHABLE(target);
1378                 return error(GL_INVALID_ENUM);
1379         }
1380
1381         Query *queryObject = createQuery(query, target);
1382
1383         // Check that name was obtained with glGenQueries
1384         if(!queryObject)
1385         {
1386                 return error(GL_INVALID_OPERATION);
1387         }
1388
1389         // Check for type mismatch
1390         if(queryObject->getType() != target)
1391         {
1392                 return error(GL_INVALID_OPERATION);
1393         }
1394
1395         // Set query as active for specified target
1396         mState.activeQuery[qType] = queryObject;
1397
1398         // Begin query
1399         queryObject->begin();
1400 }
1401
1402 void Context::endQuery(GLenum target)
1403 {
1404         QueryType qType;
1405
1406         switch(target)
1407         {
1408         case GL_ANY_SAMPLES_PASSED_EXT:                qType = QUERY_ANY_SAMPLES_PASSED;                    break;
1409         case GL_ANY_SAMPLES_PASSED_CONSERVATIVE_EXT:   qType = QUERY_ANY_SAMPLES_PASSED_CONSERVATIVE;       break;
1410         case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN: qType = QUERY_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN; break;
1411         default: UNREACHABLE(target); return;
1412         }
1413
1414         Query *queryObject = mState.activeQuery[qType];
1415
1416         if(!queryObject)
1417         {
1418                 return error(GL_INVALID_OPERATION);
1419         }
1420
1421         queryObject->end();
1422
1423         mState.activeQuery[qType] = nullptr;
1424 }
1425
1426 void Context::setFramebufferZero(Framebuffer *buffer)
1427 {
1428         delete mFramebufferNameSpace.remove(0);
1429         mFramebufferNameSpace.insert(0, buffer);
1430 }
1431
1432 void Context::setRenderbufferStorage(RenderbufferStorage *renderbuffer)
1433 {
1434         Renderbuffer *renderbufferObject = mState.renderbuffer;
1435         renderbufferObject->setStorage(renderbuffer);
1436 }
1437
1438 Framebuffer *Context::getFramebuffer(unsigned int handle) const
1439 {
1440         return mFramebufferNameSpace.find(handle);
1441 }
1442
1443 Fence *Context::getFence(unsigned int handle) const
1444 {
1445         return mFenceNameSpace.find(handle);
1446 }
1447
1448 FenceSync *Context::getFenceSync(GLsync handle) const
1449 {
1450         return mResourceManager->getFenceSync(static_cast<GLuint>(reinterpret_cast<uintptr_t>(handle)));
1451 }
1452
1453 Query *Context::getQuery(unsigned int handle) const
1454 {
1455         return mQueryNameSpace.find(handle);
1456 }
1457
1458 Query *Context::createQuery(unsigned int handle, GLenum type)
1459 {
1460         if(!mQueryNameSpace.isReserved(handle))
1461         {
1462                 return nullptr;
1463         }
1464         else
1465         {
1466                 Query *query = mQueryNameSpace.find(handle);
1467                 if(!query)
1468                 {
1469                         query = new Query(handle, type);
1470                         query->addRef();
1471                         mQueryNameSpace.insert(handle, query);
1472                 }
1473
1474                 return query;
1475         }
1476 }
1477
1478 VertexArray *Context::getVertexArray(GLuint array) const
1479 {
1480         return mVertexArrayNameSpace.find(array);
1481 }
1482
1483 VertexArray *Context::getCurrentVertexArray() const
1484 {
1485         return getVertexArray(mState.vertexArray);
1486 }
1487
1488 bool Context::isVertexArray(GLuint array) const
1489 {
1490         return mVertexArrayNameSpace.isReserved(array);
1491 }
1492
1493 bool Context::hasZeroDivisor() const
1494 {
1495         // Verify there is at least one active attribute with a divisor of zero
1496         es2::Program *programObject = getCurrentProgram();
1497         for(int attributeIndex = 0; attributeIndex < MAX_VERTEX_ATTRIBS; attributeIndex++)
1498         {
1499                 bool active = (programObject->getAttributeStream(attributeIndex) != -1);
1500                 if(active && getCurrentVertexArray()->getVertexAttribute(attributeIndex).mDivisor == 0)
1501                 {
1502                         return true;
1503                 }
1504         }
1505
1506         return false;
1507 }
1508
1509 TransformFeedback *Context::getTransformFeedback(GLuint transformFeedback) const
1510 {
1511         return mTransformFeedbackNameSpace.find(transformFeedback);
1512 }
1513
1514 Sampler *Context::getSampler(GLuint sampler) const
1515 {
1516         return mResourceManager->getSampler(sampler);
1517 }
1518
1519 bool Context::isSampler(GLuint sampler) const
1520 {
1521         return mResourceManager->isSampler(sampler);
1522 }
1523
1524 Buffer *Context::getArrayBuffer() const
1525 {
1526         return mState.arrayBuffer;
1527 }
1528
1529 Buffer *Context::getElementArrayBuffer() const
1530 {
1531         return getCurrentVertexArray()->getElementArrayBuffer();
1532 }
1533
1534 Buffer *Context::getCopyReadBuffer() const
1535 {
1536         return mState.copyReadBuffer;
1537 }
1538
1539 Buffer *Context::getCopyWriteBuffer() const
1540 {
1541         return mState.copyWriteBuffer;
1542 }
1543
1544 Buffer *Context::getPixelPackBuffer() const
1545 {
1546         return mState.pixelPackBuffer;
1547 }
1548
1549 Buffer *Context::getPixelUnpackBuffer() const
1550 {
1551         return mState.pixelUnpackBuffer;
1552 }
1553
1554 Buffer *Context::getGenericUniformBuffer() const
1555 {
1556         return mState.genericUniformBuffer;
1557 }
1558
1559 const GLvoid* Context::getPixels(const GLvoid* data) const
1560 {
1561         es2::Buffer* unpackBuffer = getPixelUnpackBuffer();
1562         const unsigned char* unpackBufferData = unpackBuffer ? static_cast<const unsigned char*>(unpackBuffer->data()) : nullptr;
1563         return unpackBufferData ? unpackBufferData + (ptrdiff_t)(data) : data;
1564 }
1565
1566 bool Context::getBuffer(GLenum target, es2::Buffer **buffer) const
1567 {
1568         switch(target)
1569         {
1570         case GL_ARRAY_BUFFER:
1571                 *buffer = getArrayBuffer();
1572                 break;
1573         case GL_ELEMENT_ARRAY_BUFFER:
1574                 *buffer = getElementArrayBuffer();
1575                 break;
1576         case GL_COPY_READ_BUFFER:
1577                 if(clientVersion >= 3)
1578                 {
1579                         *buffer = getCopyReadBuffer();
1580                         break;
1581                 }
1582                 else return false;
1583         case GL_COPY_WRITE_BUFFER:
1584                 if(clientVersion >= 3)
1585                 {
1586                         *buffer = getCopyWriteBuffer();
1587                         break;
1588                 }
1589                 else return false;
1590         case GL_PIXEL_PACK_BUFFER:
1591                 if(clientVersion >= 3)
1592                 {
1593                         *buffer = getPixelPackBuffer();
1594                         break;
1595                 }
1596                 else return false;
1597         case GL_PIXEL_UNPACK_BUFFER:
1598                 if(clientVersion >= 3)
1599                 {
1600                         *buffer = getPixelUnpackBuffer();
1601                         break;
1602                 }
1603                 else return false;
1604         case GL_TRANSFORM_FEEDBACK_BUFFER:
1605                 if(clientVersion >= 3)
1606                 {
1607                         TransformFeedback* transformFeedback = getTransformFeedback();
1608                         *buffer = transformFeedback ? static_cast<es2::Buffer*>(transformFeedback->getGenericBuffer()) : nullptr;
1609                         break;
1610                 }
1611                 else return false;
1612         case GL_UNIFORM_BUFFER:
1613                 if(clientVersion >= 3)
1614                 {
1615                         *buffer = getGenericUniformBuffer();
1616                         break;
1617                 }
1618                 else return false;
1619         default:
1620                 return false;
1621         }
1622         return true;
1623 }
1624
1625 TransformFeedback *Context::getTransformFeedback() const
1626 {
1627         return getTransformFeedback(mState.transformFeedback);
1628 }
1629
1630 Program *Context::getCurrentProgram() const
1631 {
1632         return mResourceManager->getProgram(mState.currentProgram);
1633 }
1634
1635 Texture2D *Context::getTexture2D() const
1636 {
1637         return static_cast<Texture2D*>(getSamplerTexture(mState.activeSampler, TEXTURE_2D));
1638 }
1639
1640 Texture3D *Context::getTexture3D() const
1641 {
1642         return static_cast<Texture3D*>(getSamplerTexture(mState.activeSampler, TEXTURE_3D));
1643 }
1644
1645 Texture2DArray *Context::getTexture2DArray() const
1646 {
1647         return static_cast<Texture2DArray*>(getSamplerTexture(mState.activeSampler, TEXTURE_2D_ARRAY));
1648 }
1649
1650 TextureCubeMap *Context::getTextureCubeMap() const
1651 {
1652         return static_cast<TextureCubeMap*>(getSamplerTexture(mState.activeSampler, TEXTURE_CUBE));
1653 }
1654
1655 TextureExternal *Context::getTextureExternal() const
1656 {
1657         return static_cast<TextureExternal*>(getSamplerTexture(mState.activeSampler, TEXTURE_EXTERNAL));
1658 }
1659
1660 Texture *Context::getSamplerTexture(unsigned int sampler, TextureType type) const
1661 {
1662         GLuint texid = mState.samplerTexture[type][sampler].name();
1663
1664         if(texid == 0)   // Special case: 0 refers to different initial textures based on the target
1665         {
1666                 switch(type)
1667                 {
1668                 case TEXTURE_2D: return mTexture2DZero;
1669                 case TEXTURE_3D: return mTexture3DZero;
1670                 case TEXTURE_2D_ARRAY: return mTexture2DArrayZero;
1671                 case TEXTURE_CUBE: return mTextureCubeMapZero;
1672                 case TEXTURE_EXTERNAL: return mTextureExternalZero;
1673                 default: UNREACHABLE(type);
1674                 }
1675         }
1676
1677         return mState.samplerTexture[type][sampler];
1678 }
1679
1680 void Context::samplerParameteri(GLuint sampler, GLenum pname, GLint param)
1681 {
1682         mResourceManager->checkSamplerAllocation(sampler);
1683
1684         Sampler *samplerObject = getSampler(sampler);
1685         ASSERT(samplerObject);
1686
1687         switch(pname)
1688         {
1689         case GL_TEXTURE_MIN_FILTER:    samplerObject->setMinFilter(static_cast<GLenum>(param));       break;
1690         case GL_TEXTURE_MAG_FILTER:    samplerObject->setMagFilter(static_cast<GLenum>(param));       break;
1691         case GL_TEXTURE_WRAP_S:        samplerObject->setWrapS(static_cast<GLenum>(param));           break;
1692         case GL_TEXTURE_WRAP_T:        samplerObject->setWrapT(static_cast<GLenum>(param));           break;
1693         case GL_TEXTURE_WRAP_R:        samplerObject->setWrapR(static_cast<GLenum>(param));           break;
1694         case GL_TEXTURE_MIN_LOD:       samplerObject->setMinLod(static_cast<GLfloat>(param));         break;
1695         case GL_TEXTURE_MAX_LOD:       samplerObject->setMaxLod(static_cast<GLfloat>(param));         break;
1696         case GL_TEXTURE_COMPARE_MODE:  samplerObject->setComparisonMode(static_cast<GLenum>(param));  break;
1697         case GL_TEXTURE_COMPARE_FUNC:  samplerObject->setComparisonFunc(static_cast<GLenum>(param));  break;
1698         default:                       UNREACHABLE(pname); break;
1699         }
1700 }
1701
1702 void Context::samplerParameterf(GLuint sampler, GLenum pname, GLfloat param)
1703 {
1704         mResourceManager->checkSamplerAllocation(sampler);
1705
1706         Sampler *samplerObject = getSampler(sampler);
1707         ASSERT(samplerObject);
1708
1709         switch(pname)
1710         {
1711         case GL_TEXTURE_MIN_FILTER:    samplerObject->setMinFilter(static_cast<GLenum>(roundf(param)));       break;
1712         case GL_TEXTURE_MAG_FILTER:    samplerObject->setMagFilter(static_cast<GLenum>(roundf(param)));       break;
1713         case GL_TEXTURE_WRAP_S:        samplerObject->setWrapS(static_cast<GLenum>(roundf(param)));           break;
1714         case GL_TEXTURE_WRAP_T:        samplerObject->setWrapT(static_cast<GLenum>(roundf(param)));           break;
1715         case GL_TEXTURE_WRAP_R:        samplerObject->setWrapR(static_cast<GLenum>(roundf(param)));           break;
1716         case GL_TEXTURE_MIN_LOD:       samplerObject->setMinLod(param);                                       break;
1717         case GL_TEXTURE_MAX_LOD:       samplerObject->setMaxLod(param);                                       break;
1718         case GL_TEXTURE_COMPARE_MODE:  samplerObject->setComparisonMode(static_cast<GLenum>(roundf(param)));  break;
1719         case GL_TEXTURE_COMPARE_FUNC:  samplerObject->setComparisonFunc(static_cast<GLenum>(roundf(param)));  break;
1720         default:                       UNREACHABLE(pname); break;
1721         }
1722 }
1723
1724 GLint Context::getSamplerParameteri(GLuint sampler, GLenum pname)
1725 {
1726         mResourceManager->checkSamplerAllocation(sampler);
1727
1728         Sampler *samplerObject = getSampler(sampler);
1729         ASSERT(samplerObject);
1730
1731         switch(pname)
1732         {
1733         case GL_TEXTURE_MIN_FILTER:    return static_cast<GLint>(samplerObject->getMinFilter());
1734         case GL_TEXTURE_MAG_FILTER:    return static_cast<GLint>(samplerObject->getMagFilter());
1735         case GL_TEXTURE_WRAP_S:        return static_cast<GLint>(samplerObject->getWrapS());
1736         case GL_TEXTURE_WRAP_T:        return static_cast<GLint>(samplerObject->getWrapT());
1737         case GL_TEXTURE_WRAP_R:        return static_cast<GLint>(samplerObject->getWrapR());
1738         case GL_TEXTURE_MIN_LOD:       return static_cast<GLint>(roundf(samplerObject->getMinLod()));
1739         case GL_TEXTURE_MAX_LOD:       return static_cast<GLint>(roundf(samplerObject->getMaxLod()));
1740         case GL_TEXTURE_COMPARE_MODE:  return static_cast<GLint>(samplerObject->getComparisonMode());
1741         case GL_TEXTURE_COMPARE_FUNC:  return static_cast<GLint>(samplerObject->getComparisonFunc());
1742         default:                       UNREACHABLE(pname); return 0;
1743         }
1744 }
1745
1746 GLfloat Context::getSamplerParameterf(GLuint sampler, GLenum pname)
1747 {
1748         mResourceManager->checkSamplerAllocation(sampler);
1749
1750         Sampler *samplerObject = getSampler(sampler);
1751         ASSERT(samplerObject);
1752
1753         switch(pname)
1754         {
1755         case GL_TEXTURE_MIN_FILTER:    return static_cast<GLfloat>(samplerObject->getMinFilter());
1756         case GL_TEXTURE_MAG_FILTER:    return static_cast<GLfloat>(samplerObject->getMagFilter());
1757         case GL_TEXTURE_WRAP_S:        return static_cast<GLfloat>(samplerObject->getWrapS());
1758         case GL_TEXTURE_WRAP_T:        return static_cast<GLfloat>(samplerObject->getWrapT());
1759         case GL_TEXTURE_WRAP_R:        return static_cast<GLfloat>(samplerObject->getWrapR());
1760         case GL_TEXTURE_MIN_LOD:       return samplerObject->getMinLod();
1761         case GL_TEXTURE_MAX_LOD:       return samplerObject->getMaxLod();
1762         case GL_TEXTURE_COMPARE_MODE:  return static_cast<GLfloat>(samplerObject->getComparisonMode());
1763         case GL_TEXTURE_COMPARE_FUNC:  return static_cast<GLfloat>(samplerObject->getComparisonFunc());
1764         default:                       UNREACHABLE(pname); return 0;
1765         }
1766 }
1767
1768 bool Context::getBooleanv(GLenum pname, GLboolean *params) const
1769 {
1770         switch(pname)
1771         {
1772         case GL_SHADER_COMPILER:          *params = GL_TRUE;                          break;
1773         case GL_SAMPLE_COVERAGE_INVERT:   *params = mState.sampleCoverageInvert;      break;
1774         case GL_DEPTH_WRITEMASK:          *params = mState.depthMask;                 break;
1775         case GL_COLOR_WRITEMASK:
1776                 params[0] = mState.colorMaskRed;
1777                 params[1] = mState.colorMaskGreen;
1778                 params[2] = mState.colorMaskBlue;
1779                 params[3] = mState.colorMaskAlpha;
1780                 break;
1781         case GL_CULL_FACE:                *params = mState.cullFaceEnabled;                  break;
1782         case GL_POLYGON_OFFSET_FILL:      *params = mState.polygonOffsetFillEnabled;         break;
1783         case GL_SAMPLE_ALPHA_TO_COVERAGE: *params = mState.sampleAlphaToCoverageEnabled;     break;
1784         case GL_SAMPLE_COVERAGE:          *params = mState.sampleCoverageEnabled;            break;
1785         case GL_SCISSOR_TEST:             *params = mState.scissorTestEnabled;               break;
1786         case GL_STENCIL_TEST:             *params = mState.stencilTestEnabled;               break;
1787         case GL_DEPTH_TEST:               *params = mState.depthTestEnabled;                 break;
1788         case GL_BLEND:                    *params = mState.blendEnabled;                     break;
1789         case GL_DITHER:                   *params = mState.ditherEnabled;                    break;
1790         case GL_PRIMITIVE_RESTART_FIXED_INDEX: *params = mState.primitiveRestartFixedIndexEnabled; break;
1791         case GL_RASTERIZER_DISCARD:       *params = mState.rasterizerDiscardEnabled;         break;
1792         case GL_TRANSFORM_FEEDBACK_ACTIVE:
1793                 {
1794                         TransformFeedback* transformFeedback = getTransformFeedback(mState.transformFeedback);
1795                         if(transformFeedback)
1796                         {
1797                                 *params = transformFeedback->isActive();
1798                                 break;
1799                         }
1800                         else return false;
1801                 }
1802          case GL_TRANSFORM_FEEDBACK_PAUSED:
1803                 {
1804                         TransformFeedback* transformFeedback = getTransformFeedback(mState.transformFeedback);
1805                         if(transformFeedback)
1806                         {
1807                                 *params = transformFeedback->isPaused();
1808                                 break;
1809                         }
1810                         else return false;
1811                 }
1812         default:
1813                 return false;
1814         }
1815
1816         return true;
1817 }
1818
1819 bool Context::getFloatv(GLenum pname, GLfloat *params) const
1820 {
1821         // Please note: DEPTH_CLEAR_VALUE is included in our internal getFloatv implementation
1822         // because it is stored as a float, despite the fact that the GL ES 2.0 spec names
1823         // GetIntegerv as its native query function. As it would require conversion in any
1824         // case, this should make no difference to the calling application.
1825         switch(pname)
1826         {
1827         case GL_LINE_WIDTH:               *params = mState.lineWidth;            break;
1828         case GL_SAMPLE_COVERAGE_VALUE:    *params = mState.sampleCoverageValue;  break;
1829         case GL_DEPTH_CLEAR_VALUE:        *params = mState.depthClearValue;      break;
1830         case GL_POLYGON_OFFSET_FACTOR:    *params = mState.polygonOffsetFactor;  break;
1831         case GL_POLYGON_OFFSET_UNITS:     *params = mState.polygonOffsetUnits;   break;
1832         case GL_ALIASED_LINE_WIDTH_RANGE:
1833                 params[0] = ALIASED_LINE_WIDTH_RANGE_MIN;
1834                 params[1] = ALIASED_LINE_WIDTH_RANGE_MAX;
1835                 break;
1836         case GL_ALIASED_POINT_SIZE_RANGE:
1837                 params[0] = ALIASED_POINT_SIZE_RANGE_MIN;
1838                 params[1] = ALIASED_POINT_SIZE_RANGE_MAX;
1839                 break;
1840         case GL_DEPTH_RANGE:
1841                 params[0] = mState.zNear;
1842                 params[1] = mState.zFar;
1843                 break;
1844         case GL_COLOR_CLEAR_VALUE:
1845                 params[0] = mState.colorClearValue.red;
1846                 params[1] = mState.colorClearValue.green;
1847                 params[2] = mState.colorClearValue.blue;
1848                 params[3] = mState.colorClearValue.alpha;
1849                 break;
1850         case GL_BLEND_COLOR:
1851                 params[0] = mState.blendColor.red;
1852                 params[1] = mState.blendColor.green;
1853                 params[2] = mState.blendColor.blue;
1854                 params[3] = mState.blendColor.alpha;
1855                 break;
1856         case GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT:
1857                 *params = MAX_TEXTURE_MAX_ANISOTROPY;
1858                 break;
1859         default:
1860                 return false;
1861         }
1862
1863         return true;
1864 }
1865
1866 template bool Context::getIntegerv<GLint>(GLenum pname, GLint *params) const;
1867 template bool Context::getIntegerv<GLint64>(GLenum pname, GLint64 *params) const;
1868
1869 template<typename T> bool Context::getIntegerv(GLenum pname, T *params) const
1870 {
1871         // Please note: DEPTH_CLEAR_VALUE is not included in our internal getIntegerv implementation
1872         // because it is stored as a float, despite the fact that the GL ES 2.0 spec names
1873         // GetIntegerv as its native query function. As it would require conversion in any
1874         // case, this should make no difference to the calling application. You may find it in
1875         // Context::getFloatv.
1876         switch(pname)
1877         {
1878         case GL_MAX_VERTEX_ATTRIBS:               *params = MAX_VERTEX_ATTRIBS;               return true;
1879         case GL_MAX_VERTEX_UNIFORM_VECTORS:       *params = MAX_VERTEX_UNIFORM_VECTORS;       return true;
1880         case GL_MAX_VARYING_VECTORS:              *params = MAX_VARYING_VECTORS;              return true;
1881         case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS: *params = MAX_COMBINED_TEXTURE_IMAGE_UNITS; return true;
1882         case GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:   *params = MAX_VERTEX_TEXTURE_IMAGE_UNITS;   return true;
1883         case GL_MAX_TEXTURE_IMAGE_UNITS:          *params = MAX_TEXTURE_IMAGE_UNITS;          return true;
1884         case GL_MAX_FRAGMENT_UNIFORM_VECTORS:     *params = MAX_FRAGMENT_UNIFORM_VECTORS;     return true;
1885         case GL_MAX_RENDERBUFFER_SIZE:            *params = IMPLEMENTATION_MAX_RENDERBUFFER_SIZE; return true;
1886         case GL_NUM_SHADER_BINARY_FORMATS:        *params = 0;                                    return true;
1887         case GL_SHADER_BINARY_FORMATS:      /* no shader binary formats are supported */          return true;
1888         case GL_ARRAY_BUFFER_BINDING:             *params = getArrayBufferName();                 return true;
1889         case GL_ELEMENT_ARRAY_BUFFER_BINDING:     *params = getElementArrayBufferName();          return true;
1890 //      case GL_FRAMEBUFFER_BINDING:            // now equivalent to GL_DRAW_FRAMEBUFFER_BINDING_ANGLE
1891         case GL_DRAW_FRAMEBUFFER_BINDING_ANGLE:   *params = mState.drawFramebuffer;               return true;
1892         case GL_READ_FRAMEBUFFER_BINDING_ANGLE:   *params = mState.readFramebuffer;               return true;
1893         case GL_RENDERBUFFER_BINDING:             *params = mState.renderbuffer.name();           return true;
1894         case GL_CURRENT_PROGRAM:                  *params = mState.currentProgram;                return true;
1895         case GL_PACK_ALIGNMENT:                   *params = mState.packAlignment;                 return true;
1896         case GL_UNPACK_ALIGNMENT:                 *params = mState.unpackInfo.alignment;          return true;
1897         case GL_GENERATE_MIPMAP_HINT:             *params = mState.generateMipmapHint;            return true;
1898         case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES: *params = mState.fragmentShaderDerivativeHint; return true;
1899         case GL_TEXTURE_FILTERING_HINT_CHROMIUM:  *params = mState.textureFilteringHint;          return true;
1900         case GL_ACTIVE_TEXTURE:                   *params = (mState.activeSampler + GL_TEXTURE0); return true;
1901         case GL_STENCIL_FUNC:                     *params = mState.stencilFunc;                   return true;
1902         case GL_STENCIL_REF:                      *params = mState.stencilRef;                    return true;
1903         case GL_STENCIL_VALUE_MASK:               *params = sw::clampToSignedInt(mState.stencilMask); return true;
1904         case GL_STENCIL_BACK_FUNC:                *params = mState.stencilBackFunc;               return true;
1905         case GL_STENCIL_BACK_REF:                 *params = mState.stencilBackRef;                return true;
1906         case GL_STENCIL_BACK_VALUE_MASK:          *params = sw::clampToSignedInt(mState.stencilBackMask); return true;
1907         case GL_STENCIL_FAIL:                     *params = mState.stencilFail;                   return true;
1908         case GL_STENCIL_PASS_DEPTH_FAIL:          *params = mState.stencilPassDepthFail;          return true;
1909         case GL_STENCIL_PASS_DEPTH_PASS:          *params = mState.stencilPassDepthPass;          return true;
1910         case GL_STENCIL_BACK_FAIL:                *params = mState.stencilBackFail;               return true;
1911         case GL_STENCIL_BACK_PASS_DEPTH_FAIL:     *params = mState.stencilBackPassDepthFail;      return true;
1912         case GL_STENCIL_BACK_PASS_DEPTH_PASS:     *params = mState.stencilBackPassDepthPass;      return true;
1913         case GL_DEPTH_FUNC:                       *params = mState.depthFunc;                     return true;
1914         case GL_BLEND_SRC_RGB:                    *params = mState.sourceBlendRGB;                return true;
1915         case GL_BLEND_SRC_ALPHA:                  *params = mState.sourceBlendAlpha;              return true;
1916         case GL_BLEND_DST_RGB:                    *params = mState.destBlendRGB;                  return true;
1917         case GL_BLEND_DST_ALPHA:                  *params = mState.destBlendAlpha;                return true;
1918         case GL_BLEND_EQUATION_RGB:               *params = mState.blendEquationRGB;              return true;
1919         case GL_BLEND_EQUATION_ALPHA:             *params = mState.blendEquationAlpha;            return true;
1920         case GL_STENCIL_WRITEMASK:                *params = sw::clampToSignedInt(mState.stencilWritemask); return true;
1921         case GL_STENCIL_BACK_WRITEMASK:           *params = sw::clampToSignedInt(mState.stencilBackWritemask); return true;
1922         case GL_STENCIL_CLEAR_VALUE:              *params = mState.stencilClearValue;             return true;
1923         case GL_SUBPIXEL_BITS:                    *params = 4;                                    return true;
1924         case GL_MAX_TEXTURE_SIZE:                 *params = IMPLEMENTATION_MAX_TEXTURE_SIZE;          return true;
1925         case GL_MAX_CUBE_MAP_TEXTURE_SIZE:        *params = IMPLEMENTATION_MAX_CUBE_MAP_TEXTURE_SIZE; return true;
1926         case GL_NUM_COMPRESSED_TEXTURE_FORMATS:   *params = NUM_COMPRESSED_TEXTURE_FORMATS;           return true;
1927         case GL_MAX_SAMPLES_ANGLE:                *params = IMPLEMENTATION_MAX_SAMPLES;               return true;
1928         case GL_SAMPLE_BUFFERS:
1929         case GL_SAMPLES:
1930                 {
1931                         Framebuffer *framebuffer = getDrawFramebuffer();
1932                         int width, height, samples;
1933
1934                         if(framebuffer->completeness(width, height, samples) == GL_FRAMEBUFFER_COMPLETE)
1935                         {
1936                                 switch(pname)
1937                                 {
1938                                 case GL_SAMPLE_BUFFERS:
1939                                         if(samples > 1)
1940                                         {
1941                                                 *params = 1;
1942                                         }
1943                                         else
1944                                         {
1945                                                 *params = 0;
1946                                         }
1947                                         break;
1948                                 case GL_SAMPLES:
1949                                         *params = samples;
1950                                         break;
1951                                 }
1952                         }
1953                         else
1954                         {
1955                                 *params = 0;
1956                         }
1957                 }
1958                 return true;
1959         case GL_IMPLEMENTATION_COLOR_READ_TYPE:
1960                 {
1961                         Framebuffer *framebuffer = getReadFramebuffer();
1962                         *params = framebuffer->getImplementationColorReadType();
1963                 }
1964                 return true;
1965         case GL_IMPLEMENTATION_COLOR_READ_FORMAT:
1966                 {
1967                         Framebuffer *framebuffer = getReadFramebuffer();
1968                         *params = framebuffer->getImplementationColorReadFormat();
1969                 }
1970                 return true;
1971         case GL_MAX_VIEWPORT_DIMS:
1972                 {
1973                         int maxDimension = IMPLEMENTATION_MAX_RENDERBUFFER_SIZE;
1974                         params[0] = maxDimension;
1975                         params[1] = maxDimension;
1976                 }
1977                 return true;
1978         case GL_COMPRESSED_TEXTURE_FORMATS:
1979                 {
1980                         for(int i = 0; i < NUM_COMPRESSED_TEXTURE_FORMATS; i++)
1981                         {
1982                                 params[i] = compressedTextureFormats[i];
1983                         }
1984                 }
1985                 return true;
1986         case GL_VIEWPORT:
1987                 params[0] = mState.viewportX;
1988                 params[1] = mState.viewportY;
1989                 params[2] = mState.viewportWidth;
1990                 params[3] = mState.viewportHeight;
1991                 return true;
1992         case GL_SCISSOR_BOX:
1993                 params[0] = mState.scissorX;
1994                 params[1] = mState.scissorY;
1995                 params[2] = mState.scissorWidth;
1996                 params[3] = mState.scissorHeight;
1997                 return true;
1998         case GL_CULL_FACE_MODE:                   *params = mState.cullMode;                 return true;
1999         case GL_FRONT_FACE:                       *params = mState.frontFace;                return true;
2000         case GL_RED_BITS:
2001         case GL_GREEN_BITS:
2002         case GL_BLUE_BITS:
2003         case GL_ALPHA_BITS:
2004                 {
2005                         Framebuffer *framebuffer = getDrawFramebuffer();
2006                         Renderbuffer *colorbuffer = framebuffer->getColorbuffer(0);
2007
2008                         if(colorbuffer)
2009                         {
2010                                 switch(pname)
2011                                 {
2012                                 case GL_RED_BITS:   *params = colorbuffer->getRedSize();   return true;
2013                                 case GL_GREEN_BITS: *params = colorbuffer->getGreenSize(); return true;
2014                                 case GL_BLUE_BITS:  *params = colorbuffer->getBlueSize();  return true;
2015                                 case GL_ALPHA_BITS: *params = colorbuffer->getAlphaSize(); return true;
2016                                 }
2017                         }
2018                         else
2019                         {
2020                                 *params = 0;
2021                         }
2022                 }
2023                 return true;
2024         case GL_DEPTH_BITS:
2025                 {
2026                         Framebuffer *framebuffer = getDrawFramebuffer();
2027                         Renderbuffer *depthbuffer = framebuffer->getDepthbuffer();
2028
2029                         if(depthbuffer)
2030                         {
2031                                 *params = depthbuffer->getDepthSize();
2032                         }
2033                         else
2034                         {
2035                                 *params = 0;
2036                         }
2037                 }
2038                 return true;
2039         case GL_STENCIL_BITS:
2040                 {
2041                         Framebuffer *framebuffer = getDrawFramebuffer();
2042                         Renderbuffer *stencilbuffer = framebuffer->getStencilbuffer();
2043
2044                         if(stencilbuffer)
2045                         {
2046                                 *params = stencilbuffer->getStencilSize();
2047                         }
2048                         else
2049                         {
2050                                 *params = 0;
2051                         }
2052                 }
2053                 return true;
2054         case GL_TEXTURE_BINDING_2D:
2055                 if(mState.activeSampler > MAX_COMBINED_TEXTURE_IMAGE_UNITS - 1)
2056                 {
2057                         error(GL_INVALID_OPERATION);
2058                         return false;
2059                 }
2060
2061                 *params = mState.samplerTexture[TEXTURE_2D][mState.activeSampler].name();
2062                 return true;
2063         case GL_TEXTURE_BINDING_CUBE_MAP:
2064                 if(mState.activeSampler > MAX_COMBINED_TEXTURE_IMAGE_UNITS - 1)
2065                 {
2066                         error(GL_INVALID_OPERATION);
2067                         return false;
2068                 }
2069
2070                 *params = mState.samplerTexture[TEXTURE_CUBE][mState.activeSampler].name();
2071                 return true;
2072         case GL_TEXTURE_BINDING_EXTERNAL_OES:
2073                 if(mState.activeSampler > MAX_COMBINED_TEXTURE_IMAGE_UNITS - 1)
2074                 {
2075                         error(GL_INVALID_OPERATION);
2076                         return false;
2077                 }
2078
2079                 *params = mState.samplerTexture[TEXTURE_EXTERNAL][mState.activeSampler].name();
2080                 return true;
2081         case GL_TEXTURE_BINDING_3D_OES:
2082                 if(mState.activeSampler > MAX_COMBINED_TEXTURE_IMAGE_UNITS - 1)
2083                 {
2084                         error(GL_INVALID_OPERATION);
2085                         return false;
2086                 }
2087
2088                 *params = mState.samplerTexture[TEXTURE_3D][mState.activeSampler].name();
2089                 return true;
2090         case GL_DRAW_BUFFER0:
2091         case GL_DRAW_BUFFER1:
2092         case GL_DRAW_BUFFER2:
2093         case GL_DRAW_BUFFER3:
2094         case GL_DRAW_BUFFER4:
2095         case GL_DRAW_BUFFER5:
2096         case GL_DRAW_BUFFER6:
2097         case GL_DRAW_BUFFER7:
2098         case GL_DRAW_BUFFER8:
2099         case GL_DRAW_BUFFER9:
2100         case GL_DRAW_BUFFER10:
2101         case GL_DRAW_BUFFER11:
2102         case GL_DRAW_BUFFER12:
2103         case GL_DRAW_BUFFER13:
2104         case GL_DRAW_BUFFER14:
2105         case GL_DRAW_BUFFER15:
2106                 if((pname - GL_DRAW_BUFFER0) < MAX_DRAW_BUFFERS)
2107                 {
2108                         *params = getDrawFramebuffer()->getDrawBuffer(pname - GL_DRAW_BUFFER0);
2109                 }
2110                 else
2111                 {
2112                         return false;
2113                 }
2114                 return true;
2115         case GL_MAX_DRAW_BUFFERS:
2116                 *params = MAX_DRAW_BUFFERS;
2117                 return true;
2118         case GL_MAX_COLOR_ATTACHMENTS: // Note: MAX_COLOR_ATTACHMENTS_EXT added by GL_EXT_draw_buffers
2119                 *params = MAX_COLOR_ATTACHMENTS;
2120                 return true;
2121         default:
2122                 break;
2123         }
2124
2125         if(clientVersion >= 3)
2126         {
2127                 switch(pname)
2128                 {
2129                 case GL_TEXTURE_BINDING_2D_ARRAY:
2130                         if(mState.activeSampler > MAX_COMBINED_TEXTURE_IMAGE_UNITS - 1)
2131                         {
2132                                 error(GL_INVALID_OPERATION);
2133                                 return false;
2134                         }
2135
2136                         *params = mState.samplerTexture[TEXTURE_2D_ARRAY][mState.activeSampler].name();
2137                         return true;
2138                 case GL_COPY_READ_BUFFER_BINDING:
2139                         *params = mState.copyReadBuffer.name();
2140                         return true;
2141                 case GL_COPY_WRITE_BUFFER_BINDING:
2142                         *params = mState.copyWriteBuffer.name();
2143                         return true;
2144                 case GL_MAJOR_VERSION:
2145                         *params = clientVersion;
2146                         return true;
2147                 case GL_MAX_3D_TEXTURE_SIZE:
2148                         *params = IMPLEMENTATION_MAX_TEXTURE_SIZE;
2149                         return true;
2150                 case GL_MAX_ARRAY_TEXTURE_LAYERS:
2151                         *params = IMPLEMENTATION_MAX_TEXTURE_SIZE;
2152                         return true;
2153                 case GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS:
2154                         *params = MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS;
2155                         return true;
2156                 case GL_MAX_COMBINED_UNIFORM_BLOCKS:
2157                         *params = MAX_VERTEX_UNIFORM_BLOCKS + MAX_FRAGMENT_UNIFORM_BLOCKS;
2158                         return true;
2159                 case GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS:
2160                         *params = MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS;
2161                         return true;
2162                 case GL_MAX_ELEMENT_INDEX:
2163                         *params = MAX_ELEMENT_INDEX;
2164                         return true;
2165                 case GL_MAX_ELEMENTS_INDICES:
2166                         *params = MAX_ELEMENTS_INDICES;
2167                         return true;
2168                 case GL_MAX_ELEMENTS_VERTICES:
2169                         *params = MAX_ELEMENTS_VERTICES;
2170                         return true;
2171                 case GL_MAX_FRAGMENT_INPUT_COMPONENTS:
2172                         *params = MAX_FRAGMENT_INPUT_VECTORS * 4;
2173                         return true;
2174                 case GL_MAX_FRAGMENT_UNIFORM_BLOCKS:
2175                         *params = MAX_FRAGMENT_UNIFORM_BLOCKS;
2176                         return true;
2177                 case GL_MAX_FRAGMENT_UNIFORM_COMPONENTS:
2178                         *params = MAX_FRAGMENT_UNIFORM_COMPONENTS;
2179                         return true;
2180                 case GL_MAX_PROGRAM_TEXEL_OFFSET:
2181                         UNIMPLEMENTED();
2182                         *params = MAX_PROGRAM_TEXEL_OFFSET;
2183                         return true;
2184                 case GL_MAX_SERVER_WAIT_TIMEOUT:
2185                         *params = 0;
2186                         return true;
2187                 case GL_MAX_TEXTURE_LOD_BIAS:
2188                         UNIMPLEMENTED();
2189                         *params = 2;
2190                         return true;
2191                 case GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS:
2192                         *params = sw::MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS;
2193                         return true;
2194                 case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:
2195                         *params = MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS;
2196                         return true;
2197                 case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS:
2198                         *params = sw::MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS;
2199                         return true;
2200                 case GL_MAX_UNIFORM_BLOCK_SIZE:
2201                         *params = MAX_UNIFORM_BLOCK_SIZE;
2202                         return true;
2203                 case GL_MAX_UNIFORM_BUFFER_BINDINGS:
2204                         *params = MAX_UNIFORM_BUFFER_BINDINGS;
2205                         return true;
2206                 case GL_MAX_VARYING_COMPONENTS:
2207                         *params = MAX_VARYING_VECTORS * 4;
2208                         return true;
2209                 case GL_MAX_VERTEX_OUTPUT_COMPONENTS:
2210                         *params = MAX_VERTEX_OUTPUT_VECTORS * 4;
2211                         return true;
2212                 case GL_MAX_VERTEX_UNIFORM_BLOCKS:
2213                         *params = MAX_VERTEX_UNIFORM_BLOCKS;
2214                         return true;
2215                 case GL_MAX_VERTEX_UNIFORM_COMPONENTS:
2216                         *params = MAX_VERTEX_UNIFORM_COMPONENTS;
2217                         return true;
2218                 case GL_MIN_PROGRAM_TEXEL_OFFSET:
2219                         UNIMPLEMENTED();
2220                         *params = MIN_PROGRAM_TEXEL_OFFSET;
2221                         return true;
2222                 case GL_MINOR_VERSION:
2223                         *params = 0;
2224                         return true;
2225                 case GL_NUM_EXTENSIONS:
2226                         GLuint numExtensions;
2227                         getExtensions(0, &numExtensions);
2228                         *params = numExtensions;
2229                         return true;
2230                 case GL_NUM_PROGRAM_BINARY_FORMATS:
2231                         *params = NUM_PROGRAM_BINARY_FORMATS;
2232                         return true;
2233                 case GL_PACK_ROW_LENGTH:
2234                         *params = mState.packRowLength;
2235                         return true;
2236                 case GL_PACK_SKIP_PIXELS:
2237                         *params = mState.packSkipPixels;
2238                         return true;
2239                 case GL_PACK_SKIP_ROWS:
2240                         *params = mState.packSkipRows;
2241                         return true;
2242                 case GL_PIXEL_PACK_BUFFER_BINDING:
2243                         *params = mState.pixelPackBuffer.name();
2244                         return true;
2245                 case GL_PIXEL_UNPACK_BUFFER_BINDING:
2246                         *params = mState.pixelUnpackBuffer.name();
2247                         return true;
2248                 case GL_PROGRAM_BINARY_FORMATS:
2249                         // Since NUM_PROGRAM_BINARY_FORMATS is 0, the input
2250                         // should be a 0 sized array, so don't write to params
2251                         return true;
2252                 case GL_READ_BUFFER:
2253                         *params = getReadFramebuffer()->getReadBuffer();
2254                         return true;
2255                 case GL_SAMPLER_BINDING:
2256                         *params = mState.sampler[mState.activeSampler].name();
2257                         return true;
2258                 case GL_UNIFORM_BUFFER_BINDING:
2259                         *params = mState.genericUniformBuffer.name();
2260                         return true;
2261                 case GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT:
2262                         *params = UNIFORM_BUFFER_OFFSET_ALIGNMENT;
2263                         return true;
2264                 case GL_UNIFORM_BUFFER_SIZE:
2265                         *params = static_cast<T>(mState.genericUniformBuffer->size());
2266                         return true;
2267                 case GL_UNIFORM_BUFFER_START:
2268                         *params = static_cast<T>(mState.genericUniformBuffer->offset());
2269                         return true;
2270                 case GL_UNPACK_IMAGE_HEIGHT:
2271                         *params = mState.unpackInfo.imageHeight;
2272                         return true;
2273                 case GL_UNPACK_ROW_LENGTH:
2274                         *params = mState.unpackInfo.rowLength;
2275                         return true;
2276                 case GL_UNPACK_SKIP_IMAGES:
2277                         *params = mState.unpackInfo.skipImages;
2278                         return true;
2279                 case GL_UNPACK_SKIP_PIXELS:
2280                         *params = mState.unpackInfo.skipPixels;
2281                         return true;
2282                 case GL_UNPACK_SKIP_ROWS:
2283                         *params = mState.unpackInfo.skipRows;
2284                         return true;
2285                 case GL_VERTEX_ARRAY_BINDING:
2286                         *params = getCurrentVertexArray()->name;
2287                         return true;
2288                 case GL_TRANSFORM_FEEDBACK_BINDING:
2289                         {
2290                                 TransformFeedback* transformFeedback = getTransformFeedback(mState.transformFeedback);
2291                                 if(transformFeedback)
2292                                 {
2293                                         *params = transformFeedback->name;
2294                                 }
2295                                 else
2296                                 {
2297                                         return false;
2298                                 }
2299                         }
2300                         return true;
2301                 case GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
2302                         {
2303                                 TransformFeedback* transformFeedback = getTransformFeedback(mState.transformFeedback);
2304                                 if(transformFeedback)
2305                                 {
2306                                         *params = transformFeedback->getGenericBufferName();
2307                                 }
2308                                 else
2309                                 {
2310                                         return false;
2311                                 }
2312                         }
2313                         return true;
2314                 default:
2315                         break;
2316                 }
2317         }
2318
2319         return false;
2320 }
2321
2322 template bool Context::getTransformFeedbackiv<GLint>(GLuint index, GLenum pname, GLint *param) const;
2323 template bool Context::getTransformFeedbackiv<GLint64>(GLuint index, GLenum pname, GLint64 *param) const;
2324
2325 template<typename T> bool Context::getTransformFeedbackiv(GLuint index, GLenum pname, T *param) const
2326 {
2327         TransformFeedback* transformFeedback = getTransformFeedback(mState.transformFeedback);
2328         if(!transformFeedback)
2329         {
2330                 return false;
2331         }
2332
2333         switch(pname)
2334         {
2335         case GL_TRANSFORM_FEEDBACK_BINDING: // GLint, initially 0
2336                 *param = transformFeedback->name;
2337                 break;
2338         case GL_TRANSFORM_FEEDBACK_ACTIVE: // boolean, initially GL_FALSE
2339                 *param = transformFeedback->isActive();
2340                 break;
2341         case GL_TRANSFORM_FEEDBACK_BUFFER_BINDING: // name, initially 0
2342                 *param = transformFeedback->getBufferName(index);
2343                 break;
2344         case GL_TRANSFORM_FEEDBACK_PAUSED: // boolean, initially GL_FALSE
2345                 *param = transformFeedback->isPaused();
2346                 break;
2347         case GL_TRANSFORM_FEEDBACK_BUFFER_SIZE: // indexed[n] 64-bit integer, initially 0
2348                 if(transformFeedback->getBuffer(index))
2349                 {
2350                         *param = transformFeedback->getSize(index);
2351                         break;
2352                 }
2353                 else return false;
2354         case GL_TRANSFORM_FEEDBACK_BUFFER_START: // indexed[n] 64-bit integer, initially 0
2355                 if(transformFeedback->getBuffer(index))
2356                 {
2357                         *param = transformFeedback->getOffset(index);
2358                 break;
2359                 }
2360                 else return false;
2361         default:
2362                 return false;
2363         }
2364
2365         return true;
2366 }
2367
2368 template bool Context::getUniformBufferiv<GLint>(GLuint index, GLenum pname, GLint *param) const;
2369 template bool Context::getUniformBufferiv<GLint64>(GLuint index, GLenum pname, GLint64 *param) const;
2370
2371 template<typename T> bool Context::getUniformBufferiv(GLuint index, GLenum pname, T *param) const
2372 {
2373         const BufferBinding& uniformBuffer = mState.uniformBuffers[index];
2374
2375         switch(pname)
2376         {
2377         case GL_UNIFORM_BUFFER_BINDING: // name, initially 0
2378                 *param = uniformBuffer.get().name();
2379                 break;
2380         case GL_UNIFORM_BUFFER_SIZE: // indexed[n] 64-bit integer, initially 0
2381                 *param = uniformBuffer.getSize();
2382                 break;
2383         case GL_UNIFORM_BUFFER_START: // indexed[n] 64-bit integer, initially 0
2384                 *param = uniformBuffer.getOffset();
2385                 break;
2386         default:
2387                 return false;
2388         }
2389
2390         return true;
2391 }
2392
2393 bool Context::getQueryParameterInfo(GLenum pname, GLenum *type, unsigned int *numParams) const
2394 {
2395         // Please note: the query type returned for DEPTH_CLEAR_VALUE in this implementation
2396         // is FLOAT rather than INT, as would be suggested by the GL ES 2.0 spec. This is due
2397         // to the fact that it is stored internally as a float, and so would require conversion
2398         // if returned from Context::getIntegerv. Since this conversion is already implemented
2399         // in the case that one calls glGetIntegerv to retrieve a float-typed state variable, we
2400         // place DEPTH_CLEAR_VALUE with the floats. This should make no difference to the calling
2401         // application.
2402         switch(pname)
2403         {
2404         case GL_COMPRESSED_TEXTURE_FORMATS:
2405                 {
2406                         *type = GL_INT;
2407                         *numParams = NUM_COMPRESSED_TEXTURE_FORMATS;
2408                 }
2409                 break;
2410         case GL_SHADER_BINARY_FORMATS:
2411                 {
2412                         *type = GL_INT;
2413                         *numParams = 0;
2414                 }
2415                 break;
2416         case GL_MAX_VERTEX_ATTRIBS:
2417         case GL_MAX_VERTEX_UNIFORM_VECTORS:
2418         case GL_MAX_VARYING_VECTORS:
2419         case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
2420         case GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
2421         case GL_MAX_TEXTURE_IMAGE_UNITS:
2422         case GL_MAX_FRAGMENT_UNIFORM_VECTORS:
2423         case GL_MAX_RENDERBUFFER_SIZE:
2424         case GL_NUM_SHADER_BINARY_FORMATS:
2425         case GL_NUM_COMPRESSED_TEXTURE_FORMATS:
2426         case GL_ARRAY_BUFFER_BINDING:
2427         case GL_FRAMEBUFFER_BINDING: // Same as GL_DRAW_FRAMEBUFFER_BINDING_ANGLE
2428         case GL_READ_FRAMEBUFFER_BINDING_ANGLE:
2429         case GL_RENDERBUFFER_BINDING:
2430         case GL_CURRENT_PROGRAM:
2431         case GL_PACK_ALIGNMENT:
2432         case GL_UNPACK_ALIGNMENT:
2433         case GL_GENERATE_MIPMAP_HINT:
2434         case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES:
2435         case GL_TEXTURE_FILTERING_HINT_CHROMIUM:
2436         case GL_RED_BITS:
2437         case GL_GREEN_BITS:
2438         case GL_BLUE_BITS:
2439         case GL_ALPHA_BITS:
2440         case GL_DEPTH_BITS:
2441         case GL_STENCIL_BITS:
2442         case GL_ELEMENT_ARRAY_BUFFER_BINDING:
2443         case GL_CULL_FACE_MODE:
2444         case GL_FRONT_FACE:
2445         case GL_ACTIVE_TEXTURE:
2446         case GL_STENCIL_FUNC:
2447         case GL_STENCIL_VALUE_MASK:
2448         case GL_STENCIL_REF:
2449         case GL_STENCIL_FAIL:
2450         case GL_STENCIL_PASS_DEPTH_FAIL:
2451         case GL_STENCIL_PASS_DEPTH_PASS:
2452         case GL_STENCIL_BACK_FUNC:
2453         case GL_STENCIL_BACK_VALUE_MASK:
2454         case GL_STENCIL_BACK_REF:
2455         case GL_STENCIL_BACK_FAIL:
2456         case GL_STENCIL_BACK_PASS_DEPTH_FAIL:
2457         case GL_STENCIL_BACK_PASS_DEPTH_PASS:
2458         case GL_DEPTH_FUNC:
2459         case GL_BLEND_SRC_RGB:
2460         case GL_BLEND_SRC_ALPHA:
2461         case GL_BLEND_DST_RGB:
2462         case GL_BLEND_DST_ALPHA:
2463         case GL_BLEND_EQUATION_RGB:
2464         case GL_BLEND_EQUATION_ALPHA:
2465         case GL_STENCIL_WRITEMASK:
2466         case GL_STENCIL_BACK_WRITEMASK:
2467         case GL_STENCIL_CLEAR_VALUE:
2468         case GL_SUBPIXEL_BITS:
2469         case GL_MAX_TEXTURE_SIZE:
2470         case GL_MAX_CUBE_MAP_TEXTURE_SIZE:
2471         case GL_SAMPLE_BUFFERS:
2472         case GL_SAMPLES:
2473         case GL_IMPLEMENTATION_COLOR_READ_TYPE:
2474         case GL_IMPLEMENTATION_COLOR_READ_FORMAT:
2475         case GL_TEXTURE_BINDING_2D:
2476         case GL_TEXTURE_BINDING_CUBE_MAP:
2477         case GL_TEXTURE_BINDING_EXTERNAL_OES:
2478         case GL_TEXTURE_BINDING_3D_OES:
2479         case GL_COPY_READ_BUFFER_BINDING:
2480         case GL_COPY_WRITE_BUFFER_BINDING:
2481         case GL_DRAW_BUFFER0:
2482         case GL_DRAW_BUFFER1:
2483         case GL_DRAW_BUFFER2:
2484         case GL_DRAW_BUFFER3:
2485         case GL_DRAW_BUFFER4:
2486         case GL_DRAW_BUFFER5:
2487         case GL_DRAW_BUFFER6:
2488         case GL_DRAW_BUFFER7:
2489         case GL_DRAW_BUFFER8:
2490         case GL_DRAW_BUFFER9:
2491         case GL_DRAW_BUFFER10:
2492         case GL_DRAW_BUFFER11:
2493         case GL_DRAW_BUFFER12:
2494         case GL_DRAW_BUFFER13:
2495         case GL_DRAW_BUFFER14:
2496         case GL_DRAW_BUFFER15:
2497         case GL_MAJOR_VERSION:
2498         case GL_MAX_3D_TEXTURE_SIZE:
2499         case GL_MAX_ARRAY_TEXTURE_LAYERS:
2500         case GL_MAX_COLOR_ATTACHMENTS:
2501         case GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS:
2502         case GL_MAX_COMBINED_UNIFORM_BLOCKS:
2503         case GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS:
2504         case GL_MAX_DRAW_BUFFERS:
2505         case GL_MAX_ELEMENT_INDEX:
2506         case GL_MAX_ELEMENTS_INDICES:
2507         case GL_MAX_ELEMENTS_VERTICES:
2508         case GL_MAX_FRAGMENT_INPUT_COMPONENTS:
2509         case GL_MAX_FRAGMENT_UNIFORM_BLOCKS:
2510         case GL_MAX_FRAGMENT_UNIFORM_COMPONENTS:
2511         case GL_MAX_PROGRAM_TEXEL_OFFSET:
2512         case GL_MAX_SERVER_WAIT_TIMEOUT:
2513         case GL_MAX_TEXTURE_LOD_BIAS:
2514         case GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS:
2515         case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:
2516         case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS:
2517         case GL_MAX_UNIFORM_BLOCK_SIZE:
2518         case GL_MAX_UNIFORM_BUFFER_BINDINGS:
2519         case GL_MAX_VARYING_COMPONENTS:
2520         case GL_MAX_VERTEX_OUTPUT_COMPONENTS:
2521         case GL_MAX_VERTEX_UNIFORM_BLOCKS:
2522         case GL_MAX_VERTEX_UNIFORM_COMPONENTS:
2523         case GL_MIN_PROGRAM_TEXEL_OFFSET:
2524         case GL_MINOR_VERSION:
2525         case GL_NUM_EXTENSIONS:
2526         case GL_NUM_PROGRAM_BINARY_FORMATS:
2527         case GL_PACK_ROW_LENGTH:
2528         case GL_PACK_SKIP_PIXELS:
2529         case GL_PACK_SKIP_ROWS:
2530         case GL_PIXEL_PACK_BUFFER_BINDING:
2531         case GL_PIXEL_UNPACK_BUFFER_BINDING:
2532         case GL_PROGRAM_BINARY_FORMATS:
2533         case GL_READ_BUFFER:
2534         case GL_SAMPLER_BINDING:
2535         case GL_TEXTURE_BINDING_2D_ARRAY:
2536         case GL_UNIFORM_BUFFER_BINDING:
2537         case GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT:
2538         case GL_UNIFORM_BUFFER_SIZE:
2539         case GL_UNIFORM_BUFFER_START:
2540         case GL_UNPACK_IMAGE_HEIGHT:
2541         case GL_UNPACK_ROW_LENGTH:
2542         case GL_UNPACK_SKIP_IMAGES:
2543         case GL_UNPACK_SKIP_PIXELS:
2544         case GL_UNPACK_SKIP_ROWS:
2545         case GL_VERTEX_ARRAY_BINDING:
2546         case GL_TRANSFORM_FEEDBACK_BINDING:
2547         case GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
2548                 {
2549                         *type = GL_INT;
2550                         *numParams = 1;
2551                 }
2552                 break;
2553         case GL_MAX_SAMPLES_ANGLE:
2554                 {
2555                         *type = GL_INT;
2556                         *numParams = 1;
2557                 }
2558                 break;
2559         case GL_MAX_VIEWPORT_DIMS:
2560                 {
2561                         *type = GL_INT;
2562                         *numParams = 2;
2563                 }
2564                 break;
2565         case GL_VIEWPORT:
2566         case GL_SCISSOR_BOX:
2567                 {
2568                         *type = GL_INT;
2569                         *numParams = 4;
2570                 }
2571                 break;
2572         case GL_SHADER_COMPILER:
2573         case GL_SAMPLE_COVERAGE_INVERT:
2574         case GL_DEPTH_WRITEMASK:
2575         case GL_CULL_FACE:                // CULL_FACE through DITHER are natural to IsEnabled,
2576         case GL_POLYGON_OFFSET_FILL:      // but can be retrieved through the Get{Type}v queries.
2577         case GL_SAMPLE_ALPHA_TO_COVERAGE: // For this purpose, they are treated here as bool-natural
2578         case GL_SAMPLE_COVERAGE:
2579         case GL_SCISSOR_TEST:
2580         case GL_STENCIL_TEST:
2581         case GL_DEPTH_TEST:
2582         case GL_BLEND:
2583         case GL_DITHER:
2584         case GL_PRIMITIVE_RESTART_FIXED_INDEX:
2585         case GL_RASTERIZER_DISCARD:
2586         case GL_TRANSFORM_FEEDBACK_ACTIVE:
2587         case GL_TRANSFORM_FEEDBACK_PAUSED:
2588                 {
2589                         *type = GL_BOOL;
2590                         *numParams = 1;
2591                 }
2592                 break;
2593         case GL_COLOR_WRITEMASK:
2594                 {
2595                         *type = GL_BOOL;
2596                         *numParams = 4;
2597                 }
2598                 break;
2599         case GL_POLYGON_OFFSET_FACTOR:
2600         case GL_POLYGON_OFFSET_UNITS:
2601         case GL_SAMPLE_COVERAGE_VALUE:
2602         case GL_DEPTH_CLEAR_VALUE:
2603         case GL_LINE_WIDTH:
2604                 {
2605                         *type = GL_FLOAT;
2606                         *numParams = 1;
2607                 }
2608                 break;
2609         case GL_ALIASED_LINE_WIDTH_RANGE:
2610         case GL_ALIASED_POINT_SIZE_RANGE:
2611         case GL_DEPTH_RANGE:
2612                 {
2613                         *type = GL_FLOAT;
2614                         *numParams = 2;
2615                 }
2616                 break;
2617         case GL_COLOR_CLEAR_VALUE:
2618         case GL_BLEND_COLOR:
2619                 {
2620                         *type = GL_FLOAT;
2621                         *numParams = 4;
2622                 }
2623                 break;
2624         case GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT:
2625                 *type = GL_FLOAT;
2626                 *numParams = 1;
2627                 break;
2628         default:
2629                 return false;
2630         }
2631
2632         return true;
2633 }
2634
2635 void Context::applyScissor(int width, int height)
2636 {
2637         if(mState.scissorTestEnabled)
2638         {
2639                 sw::Rect scissor = { mState.scissorX, mState.scissorY, mState.scissorX + mState.scissorWidth, mState.scissorY + mState.scissorHeight };
2640                 scissor.clip(0, 0, width, height);
2641
2642                 device->setScissorRect(scissor);
2643                 device->setScissorEnable(true);
2644         }
2645         else
2646         {
2647                 device->setScissorEnable(false);
2648         }
2649 }
2650
2651 // Applies the render target surface, depth stencil surface, viewport rectangle and scissor rectangle
2652 bool Context::applyRenderTarget()
2653 {
2654         Framebuffer *framebuffer = getDrawFramebuffer();
2655         int width, height, samples;
2656
2657         if(!framebuffer || framebuffer->completeness(width, height, samples) != GL_FRAMEBUFFER_COMPLETE)
2658         {
2659                 return error(GL_INVALID_FRAMEBUFFER_OPERATION, false);
2660         }
2661
2662         for(int i = 0; i < MAX_DRAW_BUFFERS; i++)
2663         {
2664                 if(framebuffer->getDrawBuffer(i) != GL_NONE)
2665                 {
2666                         egl::Image *renderTarget = framebuffer->getRenderTarget(i);
2667                         device->setRenderTarget(i, renderTarget);
2668                         if(renderTarget) renderTarget->release();
2669                 }
2670                 else
2671                 {
2672                         device->setRenderTarget(i, nullptr);
2673                 }
2674         }
2675
2676         egl::Image *depthBuffer = framebuffer->getDepthBuffer();
2677         device->setDepthBuffer(depthBuffer);
2678         if(depthBuffer) depthBuffer->release();
2679
2680         egl::Image *stencilBuffer = framebuffer->getStencilBuffer();
2681         device->setStencilBuffer(stencilBuffer);
2682         if(stencilBuffer) stencilBuffer->release();
2683
2684         Viewport viewport;
2685         float zNear = clamp01(mState.zNear);
2686         float zFar = clamp01(mState.zFar);
2687
2688         viewport.x0 = mState.viewportX;
2689         viewport.y0 = mState.viewportY;
2690         viewport.width = mState.viewportWidth;
2691         viewport.height = mState.viewportHeight;
2692         viewport.minZ = zNear;
2693         viewport.maxZ = zFar;
2694
2695         device->setViewport(viewport);
2696
2697         applyScissor(width, height);
2698
2699         Program *program = getCurrentProgram();
2700
2701         if(program)
2702         {
2703                 GLfloat nearFarDiff[3] = {zNear, zFar, zFar - zNear};
2704                 program->setUniform1fv(program->getUniformLocation("gl_DepthRange.near"), 1, &nearFarDiff[0]);
2705                 program->setUniform1fv(program->getUniformLocation("gl_DepthRange.far"), 1, &nearFarDiff[1]);
2706                 program->setUniform1fv(program->getUniformLocation("gl_DepthRange.diff"), 1, &nearFarDiff[2]);
2707         }
2708
2709         return true;
2710 }
2711
2712 // Applies the fixed-function state (culling, depth test, alpha blending, stenciling, etc)
2713 void Context::applyState(GLenum drawMode)
2714 {
2715         Framebuffer *framebuffer = getDrawFramebuffer();
2716
2717         if(mState.cullFaceEnabled)
2718         {
2719                 device->setCullMode(es2sw::ConvertCullMode(mState.cullMode, mState.frontFace));
2720         }
2721         else
2722         {
2723                 device->setCullMode(sw::CULL_NONE);
2724         }
2725
2726         if(mDepthStateDirty)
2727         {
2728                 if(mState.depthTestEnabled)
2729                 {
2730                         device->setDepthBufferEnable(true);
2731                         device->setDepthCompare(es2sw::ConvertDepthComparison(mState.depthFunc));
2732                 }
2733                 else
2734                 {
2735                         device->setDepthBufferEnable(false);
2736                 }
2737
2738                 mDepthStateDirty = false;
2739         }
2740
2741         if(mBlendStateDirty)
2742         {
2743                 if(mState.blendEnabled)
2744                 {
2745                         device->setAlphaBlendEnable(true);
2746                         device->setSeparateAlphaBlendEnable(true);
2747
2748                         device->setBlendConstant(es2sw::ConvertColor(mState.blendColor));
2749
2750                         device->setSourceBlendFactor(es2sw::ConvertBlendFunc(mState.sourceBlendRGB));
2751                         device->setDestBlendFactor(es2sw::ConvertBlendFunc(mState.destBlendRGB));
2752                         device->setBlendOperation(es2sw::ConvertBlendOp(mState.blendEquationRGB));
2753
2754                         device->setSourceBlendFactorAlpha(es2sw::ConvertBlendFunc(mState.sourceBlendAlpha));
2755                         device->setDestBlendFactorAlpha(es2sw::ConvertBlendFunc(mState.destBlendAlpha));
2756                         device->setBlendOperationAlpha(es2sw::ConvertBlendOp(mState.blendEquationAlpha));
2757                 }
2758                 else
2759                 {
2760                         device->setAlphaBlendEnable(false);
2761                 }
2762
2763                 mBlendStateDirty = false;
2764         }
2765
2766         if(mStencilStateDirty || mFrontFaceDirty)
2767         {
2768                 if(mState.stencilTestEnabled && framebuffer->hasStencil())
2769                 {
2770                         device->setStencilEnable(true);
2771                         device->setTwoSidedStencil(true);
2772
2773                         // get the maximum size of the stencil ref
2774                         Renderbuffer *stencilbuffer = framebuffer->getStencilbuffer();
2775                         GLuint maxStencil = (1 << stencilbuffer->getStencilSize()) - 1;
2776
2777                         if(mState.frontFace == GL_CCW)
2778                         {
2779                                 device->setStencilWriteMask(mState.stencilWritemask);
2780                                 device->setStencilCompare(es2sw::ConvertStencilComparison(mState.stencilFunc));
2781
2782                                 device->setStencilReference((mState.stencilRef < (GLint)maxStencil) ? mState.stencilRef : maxStencil);
2783                                 device->setStencilMask(mState.stencilMask);
2784
2785                                 device->setStencilFailOperation(es2sw::ConvertStencilOp(mState.stencilFail));
2786                                 device->setStencilZFailOperation(es2sw::ConvertStencilOp(mState.stencilPassDepthFail));
2787                                 device->setStencilPassOperation(es2sw::ConvertStencilOp(mState.stencilPassDepthPass));
2788
2789                                 device->setStencilWriteMaskCCW(mState.stencilBackWritemask);
2790                                 device->setStencilCompareCCW(es2sw::ConvertStencilComparison(mState.stencilBackFunc));
2791
2792                                 device->setStencilReferenceCCW((mState.stencilBackRef < (GLint)maxStencil) ? mState.stencilBackRef : maxStencil);
2793                                 device->setStencilMaskCCW(mState.stencilBackMask);
2794
2795                                 device->setStencilFailOperationCCW(es2sw::ConvertStencilOp(mState.stencilBackFail));
2796                                 device->setStencilZFailOperationCCW(es2sw::ConvertStencilOp(mState.stencilBackPassDepthFail));
2797                                 device->setStencilPassOperationCCW(es2sw::ConvertStencilOp(mState.stencilBackPassDepthPass));
2798                         }
2799                         else
2800                         {
2801                                 device->setStencilWriteMaskCCW(mState.stencilWritemask);
2802                                 device->setStencilCompareCCW(es2sw::ConvertStencilComparison(mState.stencilFunc));
2803
2804                                 device->setStencilReferenceCCW((mState.stencilRef < (GLint)maxStencil) ? mState.stencilRef : maxStencil);
2805                                 device->setStencilMaskCCW(mState.stencilMask);
2806
2807                                 device->setStencilFailOperationCCW(es2sw::ConvertStencilOp(mState.stencilFail));
2808                                 device->setStencilZFailOperationCCW(es2sw::ConvertStencilOp(mState.stencilPassDepthFail));
2809                                 device->setStencilPassOperationCCW(es2sw::ConvertStencilOp(mState.stencilPassDepthPass));
2810
2811                                 device->setStencilWriteMask(mState.stencilBackWritemask);
2812                                 device->setStencilCompare(es2sw::ConvertStencilComparison(mState.stencilBackFunc));
2813
2814                                 device->setStencilReference((mState.stencilBackRef < (GLint)maxStencil) ? mState.stencilBackRef : maxStencil);
2815                                 device->setStencilMask(mState.stencilBackMask);
2816
2817                                 device->setStencilFailOperation(es2sw::ConvertStencilOp(mState.stencilBackFail));
2818                                 device->setStencilZFailOperation(es2sw::ConvertStencilOp(mState.stencilBackPassDepthFail));
2819                                 device->setStencilPassOperation(es2sw::ConvertStencilOp(mState.stencilBackPassDepthPass));
2820                         }
2821                 }
2822                 else
2823                 {
2824                         device->setStencilEnable(false);
2825                 }
2826
2827                 mStencilStateDirty = false;
2828                 mFrontFaceDirty = false;
2829         }
2830
2831         if(mMaskStateDirty)
2832         {
2833                 for(int i = 0; i < MAX_DRAW_BUFFERS; i++)
2834                 {
2835                         device->setColorWriteMask(i, es2sw::ConvertColorMask(mState.colorMaskRed, mState.colorMaskGreen, mState.colorMaskBlue, mState.colorMaskAlpha));
2836                 }
2837
2838                 device->setDepthWriteEnable(mState.depthMask);
2839
2840                 mMaskStateDirty = false;
2841         }
2842
2843         if(mPolygonOffsetStateDirty)
2844         {
2845                 if(mState.polygonOffsetFillEnabled)
2846                 {
2847                         Renderbuffer *depthbuffer = framebuffer->getDepthbuffer();
2848                         if(depthbuffer)
2849                         {
2850                                 device->setSlopeDepthBias(mState.polygonOffsetFactor);
2851                                 float depthBias = ldexp(mState.polygonOffsetUnits, -(int)(depthbuffer->getDepthSize()));
2852                                 device->setDepthBias(depthBias);
2853                         }
2854                 }
2855                 else
2856                 {
2857                         device->setSlopeDepthBias(0);
2858                         device->setDepthBias(0);
2859                 }
2860
2861                 mPolygonOffsetStateDirty = false;
2862         }
2863
2864         if(mSampleStateDirty)
2865         {
2866                 if(mState.sampleAlphaToCoverageEnabled)
2867                 {
2868                         device->setTransparencyAntialiasing(sw::TRANSPARENCY_ALPHA_TO_COVERAGE);
2869                 }
2870                 else
2871                 {
2872                         device->setTransparencyAntialiasing(sw::TRANSPARENCY_NONE);
2873                 }
2874
2875                 if(mState.sampleCoverageEnabled)
2876                 {
2877                         unsigned int mask = 0;
2878                         if(mState.sampleCoverageValue != 0)
2879                         {
2880                                 int width, height, samples;
2881                                 framebuffer->completeness(width, height, samples);
2882
2883                                 float threshold = 0.5f;
2884
2885                                 for(int i = 0; i < samples; i++)
2886                                 {
2887                                         mask <<= 1;
2888
2889                                         if((i + 1) * mState.sampleCoverageValue >= threshold)
2890                                         {
2891                                                 threshold += 1.0f;
2892                                                 mask |= 1;
2893                                         }
2894                                 }
2895                         }
2896
2897                         if(mState.sampleCoverageInvert)
2898                         {
2899                                 mask = ~mask;
2900                         }
2901
2902                         device->setMultiSampleMask(mask);
2903                 }
2904                 else
2905                 {
2906                         device->setMultiSampleMask(0xFFFFFFFF);
2907                 }
2908
2909                 mSampleStateDirty = false;
2910         }
2911
2912         if(mDitherStateDirty)
2913         {
2914         //      UNIMPLEMENTED();   // FIXME
2915
2916                 mDitherStateDirty = false;
2917         }
2918
2919         device->setRasterizerDiscard(mState.rasterizerDiscardEnabled);
2920 }
2921
2922 GLenum Context::applyVertexBuffer(GLint base, GLint first, GLsizei count, GLsizei instanceId)
2923 {
2924         TranslatedAttribute attributes[MAX_VERTEX_ATTRIBS];
2925
2926         GLenum err = mVertexDataManager->prepareVertexData(first, count, attributes, instanceId);
2927         if(err != GL_NO_ERROR)
2928         {
2929                 return err;
2930         }
2931
2932         Program *program = getCurrentProgram();
2933
2934         device->resetInputStreams(false);
2935
2936         for(int i = 0; i < MAX_VERTEX_ATTRIBS; i++)
2937         {
2938                 if(program->getAttributeStream(i) == -1)
2939                 {
2940                         continue;
2941                 }
2942
2943                 sw::Resource *resource = attributes[i].vertexBuffer;
2944                 const void *buffer = (char*)resource->data() + attributes[i].offset;
2945
2946                 int stride = attributes[i].stride;
2947
2948                 buffer = (char*)buffer + stride * base;
2949
2950                 sw::Stream attribute(resource, buffer, stride);
2951
2952                 attribute.type = attributes[i].type;
2953                 attribute.count = attributes[i].count;
2954                 attribute.normalized = attributes[i].normalized;
2955
2956                 int stream = program->getAttributeStream(i);
2957                 device->setInputStream(stream, attribute);
2958         }
2959
2960         return GL_NO_ERROR;
2961 }
2962
2963 // Applies the indices and element array bindings
2964 GLenum Context::applyIndexBuffer(const void *indices, GLuint start, GLuint end, GLsizei count, GLenum mode, GLenum type, TranslatedIndexData *indexInfo)
2965 {
2966         GLenum err = mIndexDataManager->prepareIndexData(type, start, end, count, getCurrentVertexArray()->getElementArrayBuffer(), indices, indexInfo);
2967
2968         if(err == GL_NO_ERROR)
2969         {
2970                 device->setIndexBuffer(indexInfo->indexBuffer);
2971         }
2972
2973         return err;
2974 }
2975
2976 // Applies the shaders and shader constants
2977 void Context::applyShaders()
2978 {
2979         Program *programObject = getCurrentProgram();
2980         sw::VertexShader *vertexShader = programObject->getVertexShader();
2981         sw::PixelShader *pixelShader = programObject->getPixelShader();
2982
2983         device->setVertexShader(vertexShader);
2984         device->setPixelShader(pixelShader);
2985
2986         if(programObject->getSerial() != mAppliedProgramSerial)
2987         {
2988                 programObject->dirtyAllUniforms();
2989                 mAppliedProgramSerial = programObject->getSerial();
2990         }
2991
2992         programObject->applyTransformFeedback(device, getTransformFeedback());
2993         programObject->applyUniformBuffers(device, mState.uniformBuffers);
2994         programObject->applyUniforms(device);
2995 }
2996
2997 void Context::applyTextures()
2998 {
2999         applyTextures(sw::SAMPLER_PIXEL);
3000         applyTextures(sw::SAMPLER_VERTEX);
3001 }
3002
3003 void Context::applyTextures(sw::SamplerType samplerType)
3004 {
3005         Program *programObject = getCurrentProgram();
3006
3007         int samplerCount = (samplerType == sw::SAMPLER_PIXEL) ? MAX_TEXTURE_IMAGE_UNITS : MAX_VERTEX_TEXTURE_IMAGE_UNITS;   // Range of samplers of given sampler type
3008
3009         for(int samplerIndex = 0; samplerIndex < samplerCount; samplerIndex++)
3010         {
3011                 int textureUnit = programObject->getSamplerMapping(samplerType, samplerIndex);   // OpenGL texture image unit index
3012
3013                 if(textureUnit != -1)
3014                 {
3015                         TextureType textureType = programObject->getSamplerTextureType(samplerType, samplerIndex);
3016
3017                         Texture *texture = getSamplerTexture(textureUnit, textureType);
3018
3019                         if(texture->isSamplerComplete())
3020                         {
3021                                 GLenum wrapS, wrapT, wrapR, minFilter, magFilter;
3022                                 GLfloat minLOD, maxLOD;
3023
3024                                 Sampler *samplerObject = mState.sampler[textureUnit];
3025                                 if(samplerObject)
3026                                 {
3027                                         wrapS = samplerObject->getWrapS();
3028                                         wrapT = samplerObject->getWrapT();
3029                                         wrapR = samplerObject->getWrapR();
3030                                         minFilter = samplerObject->getMinFilter();
3031                                         magFilter = samplerObject->getMagFilter();
3032                                         minLOD = samplerObject->getMinLod();
3033                                         maxLOD = samplerObject->getMaxLod();
3034                                 }
3035                                 else
3036                                 {
3037                                         wrapS = texture->getWrapS();
3038                                         wrapT = texture->getWrapT();
3039                                         wrapR = texture->getWrapR();
3040                                         minFilter = texture->getMinFilter();
3041                                         magFilter = texture->getMagFilter();
3042                                         minLOD = texture->getMinLOD();
3043                                         maxLOD = texture->getMaxLOD();
3044                                 }
3045                                 GLfloat maxAnisotropy = texture->getMaxAnisotropy();
3046
3047                                 GLint baseLevel = texture->getBaseLevel();
3048                                 GLint maxLevel = texture->getMaxLevel();
3049                                 GLenum swizzleR = texture->getSwizzleR();
3050                                 GLenum swizzleG = texture->getSwizzleG();
3051                                 GLenum swizzleB = texture->getSwizzleB();
3052                                 GLenum swizzleA = texture->getSwizzleA();
3053
3054                                 device->setAddressingModeU(samplerType, samplerIndex, es2sw::ConvertTextureWrap(wrapS));
3055                                 device->setAddressingModeV(samplerType, samplerIndex, es2sw::ConvertTextureWrap(wrapT));
3056                                 device->setAddressingModeW(samplerType, samplerIndex, es2sw::ConvertTextureWrap(wrapR));
3057                                 device->setSwizzleR(samplerType, samplerIndex, es2sw::ConvertSwizzleType(swizzleR));
3058                                 device->setSwizzleG(samplerType, samplerIndex, es2sw::ConvertSwizzleType(swizzleG));
3059                                 device->setSwizzleB(samplerType, samplerIndex, es2sw::ConvertSwizzleType(swizzleB));
3060                                 device->setSwizzleA(samplerType, samplerIndex, es2sw::ConvertSwizzleType(swizzleA));
3061                                 device->setMinLod(samplerType, samplerIndex, minLOD);
3062                                 device->setMaxLod(samplerType, samplerIndex, maxLOD);
3063                                 device->setBaseLevel(samplerType, samplerIndex, baseLevel);
3064                                 device->setMaxLevel(samplerType, samplerIndex, maxLevel);
3065
3066                                 device->setTextureFilter(samplerType, samplerIndex, es2sw::ConvertTextureFilter(minFilter, magFilter, maxAnisotropy));
3067                                 device->setMipmapFilter(samplerType, samplerIndex, es2sw::ConvertMipMapFilter(minFilter));
3068                                 device->setMaxAnisotropy(samplerType, samplerIndex, maxAnisotropy);
3069                                 device->setHighPrecisionFiltering(samplerType, samplerIndex, mState.textureFilteringHint == GL_NICEST);
3070
3071                                 applyTexture(samplerType, samplerIndex, texture);
3072                         }
3073                         else
3074                         {
3075                                 applyTexture(samplerType, samplerIndex, nullptr);
3076                         }
3077                 }
3078                 else
3079                 {
3080                         applyTexture(samplerType, samplerIndex, nullptr);
3081                 }
3082         }
3083 }
3084
3085 void Context::applyTexture(sw::SamplerType type, int index, Texture *baseTexture)
3086 {
3087         Program *program = getCurrentProgram();
3088         int sampler = (type == sw::SAMPLER_PIXEL) ? index : 16 + index;
3089         bool textureUsed = false;
3090
3091         if(type == sw::SAMPLER_PIXEL)
3092         {
3093                 textureUsed = program->getPixelShader()->usesSampler(index);
3094         }
3095         else if(type == sw::SAMPLER_VERTEX)
3096         {
3097                 textureUsed = program->getVertexShader()->usesSampler(index);
3098         }
3099         else UNREACHABLE(type);
3100
3101         sw::Resource *resource = 0;
3102
3103         if(baseTexture && textureUsed)
3104         {
3105                 resource = baseTexture->getResource();
3106         }
3107
3108         device->setTextureResource(sampler, resource);
3109
3110         if(baseTexture && textureUsed)
3111         {
3112                 int levelCount = baseTexture->getLevelCount();
3113
3114                 if(baseTexture->getTarget() == GL_TEXTURE_2D || baseTexture->getTarget() == GL_TEXTURE_EXTERNAL_OES)
3115                 {
3116                         Texture2D *texture = static_cast<Texture2D*>(baseTexture);
3117
3118                         for(int mipmapLevel = 0; mipmapLevel < sw::MIPMAP_LEVELS; mipmapLevel++)
3119                         {
3120                                 int surfaceLevel = mipmapLevel;
3121
3122                                 if(surfaceLevel < 0)
3123                                 {
3124                                         surfaceLevel = 0;
3125                                 }
3126                                 else if(surfaceLevel >= levelCount)
3127                                 {
3128                                         surfaceLevel = levelCount - 1;
3129                                 }
3130
3131                                 egl::Image *surface = texture->getImage(surfaceLevel);
3132                                 device->setTextureLevel(sampler, 0, mipmapLevel, surface, sw::TEXTURE_2D);
3133                         }
3134                 }
3135                 else if(baseTexture->getTarget() == GL_TEXTURE_3D_OES)
3136                 {
3137                         Texture3D *texture = static_cast<Texture3D*>(baseTexture);
3138
3139                         for(int mipmapLevel = 0; mipmapLevel < sw::MIPMAP_LEVELS; mipmapLevel++)
3140                         {
3141                                 int surfaceLevel = mipmapLevel;
3142
3143                                 if(surfaceLevel < 0)
3144                                 {
3145                                         surfaceLevel = 0;
3146                                 }
3147                                 else if(surfaceLevel >= levelCount)
3148                                 {
3149                                         surfaceLevel = levelCount - 1;
3150                                 }
3151
3152                                 egl::Image *surface = texture->getImage(surfaceLevel);
3153                                 device->setTextureLevel(sampler, 0, mipmapLevel, surface, sw::TEXTURE_3D);
3154                         }
3155                 }
3156                 else if(baseTexture->getTarget() == GL_TEXTURE_2D_ARRAY)
3157                 {
3158                         Texture2DArray *texture = static_cast<Texture2DArray*>(baseTexture);
3159
3160                         for(int mipmapLevel = 0; mipmapLevel < sw::MIPMAP_LEVELS; mipmapLevel++)
3161                         {
3162                                 int surfaceLevel = mipmapLevel;
3163
3164                                 if(surfaceLevel < 0)
3165                                 {
3166                                         surfaceLevel = 0;
3167                                 }
3168                                 else if(surfaceLevel >= levelCount)
3169                                 {
3170                                         surfaceLevel = levelCount - 1;
3171                                 }
3172
3173                                 egl::Image *surface = texture->getImage(surfaceLevel);
3174                                 device->setTextureLevel(sampler, 0, mipmapLevel, surface, sw::TEXTURE_2D_ARRAY);
3175                         }
3176                 }
3177                 else if(baseTexture->getTarget() == GL_TEXTURE_CUBE_MAP)
3178                 {
3179                         for(int face = 0; face < 6; face++)
3180                         {
3181                                 TextureCubeMap *cubeTexture = static_cast<TextureCubeMap*>(baseTexture);
3182
3183                                 for(int mipmapLevel = 0; mipmapLevel < sw::MIPMAP_LEVELS; mipmapLevel++)
3184                                 {
3185                                         int surfaceLevel = mipmapLevel;
3186
3187                                         if(surfaceLevel < 0)
3188                                         {
3189                                                 surfaceLevel = 0;
3190                                         }
3191                                         else if(surfaceLevel >= levelCount)
3192                                         {
3193                                                 surfaceLevel = levelCount - 1;
3194                                         }
3195
3196                                         egl::Image *surface = cubeTexture->getImage(face, surfaceLevel);
3197                                         device->setTextureLevel(sampler, face, mipmapLevel, surface, sw::TEXTURE_CUBE);
3198                                 }
3199                         }
3200                 }
3201                 else UNIMPLEMENTED();
3202         }
3203         else
3204         {
3205                 device->setTextureLevel(sampler, 0, 0, 0, sw::TEXTURE_NULL);
3206         }
3207 }
3208
3209 void Context::readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLsizei *bufSize, void* pixels)
3210 {
3211         Framebuffer *framebuffer = getReadFramebuffer();
3212         int framebufferWidth, framebufferHeight, framebufferSamples;
3213
3214         if(framebuffer->completeness(framebufferWidth, framebufferHeight, framebufferSamples) != GL_FRAMEBUFFER_COMPLETE)
3215         {
3216                 return error(GL_INVALID_FRAMEBUFFER_OPERATION);
3217         }
3218
3219         if(getReadFramebufferName() != 0 && framebufferSamples != 0)
3220         {
3221                 return error(GL_INVALID_OPERATION);
3222         }
3223
3224         if(!IsValidReadPixelsFormatType(framebuffer, format, type, clientVersion))
3225         {
3226                 return error(GL_INVALID_OPERATION);
3227         }
3228
3229         GLsizei outputWidth = (mState.packRowLength > 0) ? mState.packRowLength : width;
3230         GLsizei outputPitch = egl::ComputePitch(outputWidth, format, type, mState.packAlignment);
3231         GLsizei outputHeight = (mState.packImageHeight == 0) ? height : mState.packImageHeight;
3232         pixels = getPixelPackBuffer() ? (unsigned char*)getPixelPackBuffer()->data() + (ptrdiff_t)pixels : (unsigned char*)pixels;
3233         pixels = ((char*)pixels) + egl::ComputePackingOffset(format, type, outputWidth, outputHeight, mState.packAlignment, mState.packSkipImages, mState.packSkipRows, mState.packSkipPixels);
3234
3235         // Sized query sanity check
3236         if(bufSize)
3237         {
3238                 int requiredSize = outputPitch * height;
3239                 if(requiredSize > *bufSize)
3240                 {
3241                         return error(GL_INVALID_OPERATION);
3242                 }
3243         }
3244
3245         egl::Image *renderTarget = nullptr;
3246         switch(format)
3247         {
3248         case GL_DEPTH_COMPONENT:
3249                 renderTarget = framebuffer->getDepthBuffer();
3250                 break;
3251         default:
3252                 renderTarget = framebuffer->getReadRenderTarget();
3253                 break;
3254         }
3255
3256         if(!renderTarget)
3257         {
3258                 return error(GL_INVALID_OPERATION);
3259         }
3260
3261         sw::Rect rect = {x, y, x + width, y + height};
3262         sw::Rect dstRect = { 0, 0, width, height };
3263         rect.clip(0, 0, renderTarget->getWidth(), renderTarget->getHeight());
3264
3265         sw::Surface *externalSurface = sw::Surface::create(width, height, 1, egl::ConvertFormatType(format, type), pixels, outputPitch, outputPitch * outputHeight);
3266         sw::SliceRect sliceRect(rect);
3267         sw::SliceRect dstSliceRect(dstRect);
3268         device->blit(renderTarget, sliceRect, externalSurface, dstSliceRect, false);
3269         delete externalSurface;
3270
3271         renderTarget->release();
3272 }
3273
3274 void Context::clear(GLbitfield mask)
3275 {
3276         if(mState.rasterizerDiscardEnabled)
3277         {
3278                 return;
3279         }
3280
3281         Framebuffer *framebuffer = getDrawFramebuffer();
3282
3283         if(!framebuffer || framebuffer->completeness() != GL_FRAMEBUFFER_COMPLETE)
3284         {
3285                 return error(GL_INVALID_FRAMEBUFFER_OPERATION);
3286         }
3287
3288         if(!applyRenderTarget())
3289         {
3290                 return;
3291         }
3292
3293         if(mask & GL_COLOR_BUFFER_BIT)
3294         {
3295                 unsigned int rgbaMask = getColorMask();
3296
3297                 if(rgbaMask != 0)
3298                 {
3299                         device->clearColor(mState.colorClearValue.red, mState.colorClearValue.green, mState.colorClearValue.blue, mState.colorClearValue.alpha, rgbaMask);
3300                 }
3301         }
3302
3303         if(mask & GL_DEPTH_BUFFER_BIT)
3304         {
3305                 if(mState.depthMask != 0)
3306                 {
3307                         float depth = clamp01(mState.depthClearValue);
3308                         device->clearDepth(depth);
3309                 }
3310         }
3311
3312         if(mask & GL_STENCIL_BUFFER_BIT)
3313         {
3314                 if(mState.stencilWritemask != 0)
3315                 {
3316                         int stencil = mState.stencilClearValue & 0x000000FF;
3317                         device->clearStencil(stencil, mState.stencilWritemask);
3318                 }
3319         }
3320 }
3321
3322 void Context::clearColorBuffer(GLint drawbuffer, void *value, sw::Format format)
3323 {
3324         unsigned int rgbaMask = getColorMask();
3325         if(rgbaMask && !mState.rasterizerDiscardEnabled)
3326         {
3327                 Framebuffer *framebuffer = getDrawFramebuffer();
3328                 egl::Image *colorbuffer = framebuffer->getRenderTarget(drawbuffer);
3329
3330                 if(colorbuffer)
3331                 {
3332                         sw::Rect clearRect = colorbuffer->getRect();
3333
3334                         if(mState.scissorTestEnabled)
3335                         {
3336                                 clearRect.clip(mState.scissorX, mState.scissorY, mState.scissorX + mState.scissorWidth, mState.scissorY + mState.scissorHeight);
3337                         }
3338
3339                         device->clear(value, format, colorbuffer, clearRect, rgbaMask);
3340
3341                         colorbuffer->release();
3342                 }
3343         }
3344 }
3345
3346 void Context::clearColorBuffer(GLint drawbuffer, const GLint *value)
3347 {
3348         clearColorBuffer(drawbuffer, (void*)value, sw::FORMAT_A32B32G32R32I);
3349 }
3350
3351 void Context::clearColorBuffer(GLint drawbuffer, const GLuint *value)
3352 {
3353         clearColorBuffer(drawbuffer, (void*)value, sw::FORMAT_A32B32G32R32UI);
3354 }
3355
3356 void Context::clearColorBuffer(GLint drawbuffer, const GLfloat *value)
3357 {
3358         clearColorBuffer(drawbuffer, (void*)value, sw::FORMAT_A32B32G32R32F);
3359 }
3360
3361 void Context::clearDepthBuffer(const GLfloat value)
3362 {
3363         if(mState.depthMask && !mState.rasterizerDiscardEnabled)
3364         {
3365                 Framebuffer *framebuffer = getDrawFramebuffer();
3366                 egl::Image *depthbuffer = framebuffer->getDepthBuffer();
3367
3368                 if(depthbuffer)
3369                 {
3370                         float depth = clamp01(value);
3371                         sw::Rect clearRect = depthbuffer->getRect();
3372
3373                         if(mState.scissorTestEnabled)
3374                         {
3375                                 clearRect.clip(mState.scissorX, mState.scissorY, mState.scissorX + mState.scissorWidth, mState.scissorY + mState.scissorHeight);
3376                         }
3377
3378                         depthbuffer->clearDepth(depth, clearRect.x0, clearRect.y0, clearRect.width(), clearRect.height());
3379
3380                         depthbuffer->release();
3381                 }
3382         }
3383 }
3384
3385 void Context::clearStencilBuffer(const GLint value)
3386 {
3387         if(mState.stencilWritemask && !mState.rasterizerDiscardEnabled)
3388         {
3389                 Framebuffer *framebuffer = getDrawFramebuffer();
3390                 egl::Image *stencilbuffer = framebuffer->getStencilBuffer();
3391
3392                 if(stencilbuffer)
3393                 {
3394                         unsigned char stencil = value < 0 ? 0 : static_cast<unsigned char>(value & 0x000000FF);
3395                         sw::Rect clearRect = stencilbuffer->getRect();
3396
3397                         if(mState.scissorTestEnabled)
3398                         {
3399                                 clearRect.clip(mState.scissorX, mState.scissorY, mState.scissorX + mState.scissorWidth, mState.scissorY + mState.scissorHeight);
3400                         }
3401
3402                         stencilbuffer->clearStencil(stencil, static_cast<unsigned char>(mState.stencilWritemask), clearRect.x0, clearRect.y0, clearRect.width(), clearRect.height());
3403
3404                         stencilbuffer->release();
3405                 }
3406         }
3407 }
3408
3409 void Context::drawArrays(GLenum mode, GLint first, GLsizei count, GLsizei instanceCount)
3410 {
3411         if(!mState.currentProgram)
3412         {
3413                 return error(GL_INVALID_OPERATION);
3414         }
3415
3416         sw::DrawType primitiveType;
3417         int primitiveCount;
3418         int verticesPerPrimitive;
3419
3420         if(!es2sw::ConvertPrimitiveType(mode, count, GL_NONE, primitiveType, primitiveCount, verticesPerPrimitive))
3421                 return error(GL_INVALID_ENUM);
3422
3423         if(primitiveCount <= 0)
3424         {
3425                 return;
3426         }
3427
3428         if(!applyRenderTarget())
3429         {
3430                 return;
3431         }
3432
3433         applyState(mode);
3434
3435         for(int i = 0; i < instanceCount; ++i)
3436         {
3437                 device->setInstanceID(i);
3438
3439                 GLenum err = applyVertexBuffer(0, first, count, i);
3440                 if(err != GL_NO_ERROR)
3441                 {
3442                         return error(err);
3443                 }
3444
3445                 applyShaders();
3446                 applyTextures();
3447
3448                 if(!getCurrentProgram()->validateSamplers(false))
3449                 {
3450                         return error(GL_INVALID_OPERATION);
3451                 }
3452
3453                 TransformFeedback* transformFeedback = getTransformFeedback();
3454                 if(!cullSkipsDraw(mode) || (transformFeedback->isActive() && !transformFeedback->isPaused()))
3455                 {
3456                         device->drawPrimitive(primitiveType, primitiveCount);
3457                 }
3458                 if(transformFeedback)
3459                 {
3460                         transformFeedback->addVertexOffset(primitiveCount * verticesPerPrimitive);
3461                 }
3462         }
3463 }
3464
3465 void Context::drawElements(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const void *indices, GLsizei instanceCount)
3466 {
3467         if(!mState.currentProgram)
3468         {
3469                 return error(GL_INVALID_OPERATION);
3470         }
3471
3472         if(!indices && !getCurrentVertexArray()->getElementArrayBuffer())
3473         {
3474                 return error(GL_INVALID_OPERATION);
3475         }
3476
3477         sw::DrawType primitiveType;
3478         int primitiveCount;
3479         int verticesPerPrimitive;
3480
3481         if(!es2sw::ConvertPrimitiveType(mode, count, type, primitiveType, primitiveCount, verticesPerPrimitive))
3482                 return error(GL_INVALID_ENUM);
3483
3484         if(primitiveCount <= 0)
3485         {
3486                 return;
3487         }
3488
3489         if(!applyRenderTarget())
3490         {
3491                 return;
3492         }
3493
3494         applyState(mode);
3495
3496         for(int i = 0; i < instanceCount; ++i)
3497         {
3498                 device->setInstanceID(i);
3499
3500                 TranslatedIndexData indexInfo;
3501                 GLenum err = applyIndexBuffer(indices, start, end, count, mode, type, &indexInfo);
3502                 if(err != GL_NO_ERROR)
3503                 {
3504                         return error(err);
3505                 }
3506
3507                 GLsizei vertexCount = indexInfo.maxIndex - indexInfo.minIndex + 1;
3508                 err = applyVertexBuffer(-(int)indexInfo.minIndex, indexInfo.minIndex, vertexCount, i);
3509                 if(err != GL_NO_ERROR)
3510                 {
3511                         return error(err);
3512                 }
3513
3514                 applyShaders();
3515                 applyTextures();
3516
3517                 if(!getCurrentProgram()->validateSamplers(false))
3518                 {
3519                         return error(GL_INVALID_OPERATION);
3520                 }
3521
3522                 TransformFeedback* transformFeedback = getTransformFeedback();
3523                 if(!cullSkipsDraw(mode) || (transformFeedback->isActive() && !transformFeedback->isPaused()))
3524                 {
3525                         device->drawIndexedPrimitive(primitiveType, indexInfo.indexOffset, primitiveCount);
3526                 }
3527                 if(transformFeedback)
3528                 {
3529                         transformFeedback->addVertexOffset(primitiveCount * verticesPerPrimitive);
3530                 }
3531         }
3532 }
3533
3534 void Context::blit(sw::Surface *source, const sw::SliceRect &sRect, sw::Surface *dest, const sw::SliceRect &dRect)
3535 {
3536         device->blit(source, sRect, dest, dRect, false);
3537 }
3538
3539 void Context::finish()
3540 {
3541         device->finish();
3542 }
3543
3544 void Context::flush()
3545 {
3546         // We don't queue anything without processing it as fast as possible
3547 }
3548
3549 void Context::recordInvalidEnum()
3550 {
3551         mInvalidEnum = true;
3552 }
3553
3554 void Context::recordInvalidValue()
3555 {
3556         mInvalidValue = true;
3557 }
3558
3559 void Context::recordInvalidOperation()
3560 {
3561         mInvalidOperation = true;
3562 }
3563
3564 void Context::recordOutOfMemory()
3565 {
3566         mOutOfMemory = true;
3567 }
3568
3569 void Context::recordInvalidFramebufferOperation()
3570 {
3571         mInvalidFramebufferOperation = true;
3572 }
3573
3574 // Get one of the recorded errors and clear its flag, if any.
3575 // [OpenGL ES 2.0.24] section 2.5 page 13.
3576 GLenum Context::getError()
3577 {
3578         if(mInvalidEnum)
3579         {
3580                 mInvalidEnum = false;
3581
3582                 return GL_INVALID_ENUM;
3583         }
3584
3585         if(mInvalidValue)
3586         {
3587                 mInvalidValue = false;
3588
3589                 return GL_INVALID_VALUE;
3590         }
3591
3592         if(mInvalidOperation)
3593         {
3594                 mInvalidOperation = false;
3595
3596                 return GL_INVALID_OPERATION;
3597         }
3598
3599         if(mOutOfMemory)
3600         {
3601                 mOutOfMemory = false;
3602
3603                 return GL_OUT_OF_MEMORY;
3604         }
3605
3606         if(mInvalidFramebufferOperation)
3607         {
3608                 mInvalidFramebufferOperation = false;
3609
3610                 return GL_INVALID_FRAMEBUFFER_OPERATION;
3611         }
3612
3613         return GL_NO_ERROR;
3614 }
3615
3616 int Context::getSupportedMultisampleCount(int requested)
3617 {
3618         int supported = 0;
3619
3620         for(int i = NUM_MULTISAMPLE_COUNTS - 1; i >= 0; i--)
3621         {
3622                 if(supported >= requested)
3623                 {
3624                         return supported;
3625                 }
3626
3627                 supported = multisampleCount[i];
3628         }
3629
3630         return supported;
3631 }
3632
3633 void Context::detachBuffer(GLuint buffer)
3634 {
3635         // [OpenGL ES 2.0.24] section 2.9 page 22:
3636         // If a buffer object is deleted while it is bound, all bindings to that object in the current context
3637         // (i.e. in the thread that called Delete-Buffers) are reset to zero.
3638
3639         if(mState.copyReadBuffer.name() == buffer)
3640         {
3641                 mState.copyReadBuffer = nullptr;
3642         }
3643
3644         if(mState.copyWriteBuffer.name() == buffer)
3645         {
3646                 mState.copyWriteBuffer = nullptr;
3647         }
3648
3649         if(mState.pixelPackBuffer.name() == buffer)
3650         {
3651                 mState.pixelPackBuffer = nullptr;
3652         }
3653
3654         if(mState.pixelUnpackBuffer.name() == buffer)
3655         {
3656                 mState.pixelUnpackBuffer = nullptr;
3657         }
3658
3659         if(mState.genericUniformBuffer.name() == buffer)
3660         {
3661                 mState.genericUniformBuffer = nullptr;
3662         }
3663
3664         if(getArrayBufferName() == buffer)
3665         {
3666                 mState.arrayBuffer = nullptr;
3667         }
3668
3669         // Only detach from the current transform feedback
3670         TransformFeedback* currentTransformFeedback = getTransformFeedback();
3671         if(currentTransformFeedback)
3672         {
3673                 currentTransformFeedback->detachBuffer(buffer);
3674         }
3675
3676         // Only detach from the current vertex array
3677         VertexArray* currentVertexArray = getCurrentVertexArray();
3678         if(currentVertexArray)
3679         {
3680                 currentVertexArray->detachBuffer(buffer);
3681         }
3682
3683         for(int attribute = 0; attribute < MAX_VERTEX_ATTRIBS; attribute++)
3684         {
3685                 if(mState.vertexAttribute[attribute].mBoundBuffer.name() == buffer)
3686                 {
3687                         mState.vertexAttribute[attribute].mBoundBuffer = nullptr;
3688                 }
3689         }
3690 }
3691
3692 void Context::detachTexture(GLuint texture)
3693 {
3694         // [OpenGL ES 2.0.24] section 3.8 page 84:
3695         // If a texture object is deleted, it is as if all texture units which are bound to that texture object are
3696         // rebound to texture object zero
3697
3698         for(int type = 0; type < TEXTURE_TYPE_COUNT; type++)
3699         {
3700                 for(int sampler = 0; sampler < MAX_COMBINED_TEXTURE_IMAGE_UNITS; sampler++)
3701                 {
3702                         if(mState.samplerTexture[type][sampler].name() == texture)
3703                         {
3704                                 mState.samplerTexture[type][sampler] = nullptr;
3705                         }
3706                 }
3707         }
3708
3709         // [OpenGL ES 2.0.24] section 4.4 page 112:
3710         // If a texture object is deleted while its image is attached to the currently bound framebuffer, then it is
3711         // as if FramebufferTexture2D had been called, with a texture of 0, for each attachment point to which this
3712         // image was attached in the currently bound framebuffer.
3713
3714         Framebuffer *readFramebuffer = getReadFramebuffer();
3715         Framebuffer *drawFramebuffer = getDrawFramebuffer();
3716
3717         if(readFramebuffer)
3718         {
3719                 readFramebuffer->detachTexture(texture);
3720         }
3721
3722         if(drawFramebuffer && drawFramebuffer != readFramebuffer)
3723         {
3724                 drawFramebuffer->detachTexture(texture);
3725         }
3726 }
3727
3728 void Context::detachFramebuffer(GLuint framebuffer)
3729 {
3730         // [OpenGL ES 2.0.24] section 4.4 page 107:
3731         // If a framebuffer that is currently bound to the target FRAMEBUFFER is deleted, it is as though
3732         // BindFramebuffer had been executed with the target of FRAMEBUFFER and framebuffer of zero.
3733
3734         if(mState.readFramebuffer == framebuffer)
3735         {
3736                 bindReadFramebuffer(0);
3737         }
3738
3739         if(mState.drawFramebuffer == framebuffer)
3740         {
3741                 bindDrawFramebuffer(0);
3742         }
3743 }
3744
3745 void Context::detachRenderbuffer(GLuint renderbuffer)
3746 {
3747         // [OpenGL ES 2.0.24] section 4.4 page 109:
3748         // If a renderbuffer that is currently bound to RENDERBUFFER is deleted, it is as though BindRenderbuffer
3749         // had been executed with the target RENDERBUFFER and name of zero.
3750
3751         if(mState.renderbuffer.name() == renderbuffer)
3752         {
3753                 bindRenderbuffer(0);
3754         }
3755
3756         // [OpenGL ES 2.0.24] section 4.4 page 111:
3757         // If a renderbuffer object is deleted while its image is attached to the currently bound framebuffer,
3758         // then it is as if FramebufferRenderbuffer had been called, with a renderbuffer of 0, for each attachment
3759         // point to which this image was attached in the currently bound framebuffer.
3760
3761         Framebuffer *readFramebuffer = getReadFramebuffer();
3762         Framebuffer *drawFramebuffer = getDrawFramebuffer();
3763
3764         if(readFramebuffer)
3765         {
3766                 readFramebuffer->detachRenderbuffer(renderbuffer);
3767         }
3768
3769         if(drawFramebuffer && drawFramebuffer != readFramebuffer)
3770         {
3771                 drawFramebuffer->detachRenderbuffer(renderbuffer);
3772         }
3773 }
3774
3775 void Context::detachSampler(GLuint sampler)
3776 {
3777         // [OpenGL ES 3.0.2] section 3.8.2 pages 123-124:
3778         // If a sampler object that is currently bound to one or more texture units is
3779         // deleted, it is as though BindSampler is called once for each texture unit to
3780         // which the sampler is bound, with unit set to the texture unit and sampler set to zero.
3781         for(size_t textureUnit = 0; textureUnit < MAX_COMBINED_TEXTURE_IMAGE_UNITS; ++textureUnit)
3782         {
3783                 gl::BindingPointer<Sampler> &samplerBinding = mState.sampler[textureUnit];
3784                 if(samplerBinding.name() == sampler)
3785                 {
3786                         samplerBinding = nullptr;
3787                 }
3788         }
3789 }
3790
3791 bool Context::cullSkipsDraw(GLenum drawMode)
3792 {
3793         return mState.cullFaceEnabled && mState.cullMode == GL_FRONT_AND_BACK && isTriangleMode(drawMode);
3794 }
3795
3796 bool Context::isTriangleMode(GLenum drawMode)
3797 {
3798         switch(drawMode)
3799         {
3800         case GL_TRIANGLES:
3801         case GL_TRIANGLE_FAN:
3802         case GL_TRIANGLE_STRIP:
3803                 return true;
3804         case GL_POINTS:
3805         case GL_LINES:
3806         case GL_LINE_LOOP:
3807         case GL_LINE_STRIP:
3808                 return false;
3809         default: UNREACHABLE(drawMode);
3810         }
3811
3812         return false;
3813 }
3814
3815 void Context::setVertexAttrib(GLuint index, const GLfloat *values)
3816 {
3817         ASSERT(index < MAX_VERTEX_ATTRIBS);
3818
3819         mState.vertexAttribute[index].setCurrentValue(values);
3820
3821         mVertexDataManager->dirtyCurrentValue(index);
3822 }
3823
3824 void Context::setVertexAttrib(GLuint index, const GLint *values)
3825 {
3826         ASSERT(index < MAX_VERTEX_ATTRIBS);
3827
3828         mState.vertexAttribute[index].setCurrentValue(values);
3829
3830         mVertexDataManager->dirtyCurrentValue(index);
3831 }
3832
3833 void Context::setVertexAttrib(GLuint index, const GLuint *values)
3834 {
3835         ASSERT(index < MAX_VERTEX_ATTRIBS);
3836
3837         mState.vertexAttribute[index].setCurrentValue(values);
3838
3839         mVertexDataManager->dirtyCurrentValue(index);
3840 }
3841
3842 void Context::blitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
3843                               GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
3844                               GLbitfield mask, bool filter, bool allowPartialDepthStencilBlit)
3845 {
3846         Framebuffer *readFramebuffer = getReadFramebuffer();
3847         Framebuffer *drawFramebuffer = getDrawFramebuffer();
3848
3849         int readBufferWidth, readBufferHeight, readBufferSamples;
3850         int drawBufferWidth, drawBufferHeight, drawBufferSamples;
3851
3852         if(!readFramebuffer || readFramebuffer->completeness(readBufferWidth, readBufferHeight, readBufferSamples) != GL_FRAMEBUFFER_COMPLETE ||
3853            !drawFramebuffer || drawFramebuffer->completeness(drawBufferWidth, drawBufferHeight, drawBufferSamples) != GL_FRAMEBUFFER_COMPLETE)
3854         {
3855                 return error(GL_INVALID_FRAMEBUFFER_OPERATION);
3856         }
3857
3858         if(drawBufferSamples > 1)
3859         {
3860                 return error(GL_INVALID_OPERATION);
3861         }
3862
3863         sw::SliceRect sourceRect;
3864         sw::SliceRect destRect;
3865         bool flipX = (srcX0 < srcX1) ^ (dstX0 < dstX1);
3866         bool flipy = (srcY0 < srcY1) ^ (dstY0 < dstY1);
3867
3868         if(srcX0 < srcX1)
3869         {
3870                 sourceRect.x0 = srcX0;
3871                 sourceRect.x1 = srcX1;
3872         }
3873         else
3874         {
3875                 sourceRect.x0 = srcX1;
3876                 sourceRect.x1 = srcX0;
3877         }
3878
3879         if(dstX0 < dstX1)
3880         {
3881                 destRect.x0 = dstX0;
3882                 destRect.x1 = dstX1;
3883         }
3884         else
3885         {
3886                 destRect.x0 = dstX1;
3887                 destRect.x1 = dstX0;
3888         }
3889
3890         if(srcY0 < srcY1)
3891         {
3892                 sourceRect.y0 = srcY0;
3893                 sourceRect.y1 = srcY1;
3894         }
3895         else
3896         {
3897                 sourceRect.y0 = srcY1;
3898                 sourceRect.y1 = srcY0;
3899         }
3900
3901         if(dstY0 < dstY1)
3902         {
3903                 destRect.y0 = dstY0;
3904                 destRect.y1 = dstY1;
3905         }
3906         else
3907         {
3908                 destRect.y0 = dstY1;
3909                 destRect.y1 = dstY0;
3910         }
3911
3912         sw::Rect sourceScissoredRect = sourceRect;
3913         sw::Rect destScissoredRect = destRect;
3914
3915         if(mState.scissorTestEnabled)   // Only write to parts of the destination framebuffer which pass the scissor test
3916         {
3917                 if(destRect.x0 < mState.scissorX)
3918                 {
3919                         int xDiff = mState.scissorX - destRect.x0;
3920                         destScissoredRect.x0 = mState.scissorX;
3921                         sourceScissoredRect.x0 += xDiff;
3922                 }
3923
3924                 if(destRect.x1 > mState.scissorX + mState.scissorWidth)
3925                 {
3926                         int xDiff = destRect.x1 - (mState.scissorX + mState.scissorWidth);
3927                         destScissoredRect.x1 = mState.scissorX + mState.scissorWidth;
3928                         sourceScissoredRect.x1 -= xDiff;
3929                 }
3930
3931                 if(destRect.y0 < mState.scissorY)
3932                 {
3933                         int yDiff = mState.scissorY - destRect.y0;
3934                         destScissoredRect.y0 = mState.scissorY;
3935                         sourceScissoredRect.y0 += yDiff;
3936                 }
3937
3938                 if(destRect.y1 > mState.scissorY + mState.scissorHeight)
3939                 {
3940                         int yDiff = destRect.y1 - (mState.scissorY + mState.scissorHeight);
3941                         destScissoredRect.y1 = mState.scissorY + mState.scissorHeight;
3942                         sourceScissoredRect.y1 -= yDiff;
3943                 }
3944         }
3945
3946         sw::Rect sourceTrimmedRect = sourceScissoredRect;
3947         sw::Rect destTrimmedRect = destScissoredRect;
3948
3949         // The source & destination rectangles also may need to be trimmed if they fall out of the bounds of
3950         // the actual draw and read surfaces.
3951         if(sourceTrimmedRect.x0 < 0)
3952         {
3953                 int xDiff = 0 - sourceTrimmedRect.x0;
3954                 sourceTrimmedRect.x0 = 0;
3955                 destTrimmedRect.x0 += xDiff;
3956         }
3957
3958         if(sourceTrimmedRect.x1 > readBufferWidth)
3959         {
3960                 int xDiff = sourceTrimmedRect.x1 - readBufferWidth;
3961                 sourceTrimmedRect.x1 = readBufferWidth;
3962                 destTrimmedRect.x1 -= xDiff;
3963         }
3964
3965         if(sourceTrimmedRect.y0 < 0)
3966         {
3967                 int yDiff = 0 - sourceTrimmedRect.y0;
3968                 sourceTrimmedRect.y0 = 0;
3969                 destTrimmedRect.y0 += yDiff;
3970         }
3971
3972         if(sourceTrimmedRect.y1 > readBufferHeight)
3973         {
3974                 int yDiff = sourceTrimmedRect.y1 - readBufferHeight;
3975                 sourceTrimmedRect.y1 = readBufferHeight;
3976                 destTrimmedRect.y1 -= yDiff;
3977         }
3978
3979         if(destTrimmedRect.x0 < 0)
3980         {
3981                 int xDiff = 0 - destTrimmedRect.x0;
3982                 destTrimmedRect.x0 = 0;
3983                 sourceTrimmedRect.x0 += xDiff;
3984         }
3985
3986         if(destTrimmedRect.x1 > drawBufferWidth)
3987         {
3988                 int xDiff = destTrimmedRect.x1 - drawBufferWidth;
3989                 destTrimmedRect.x1 = drawBufferWidth;
3990                 sourceTrimmedRect.x1 -= xDiff;
3991         }
3992
3993         if(destTrimmedRect.y0 < 0)
3994         {
3995                 int yDiff = 0 - destTrimmedRect.y0;
3996                 destTrimmedRect.y0 = 0;
3997                 sourceTrimmedRect.y0 += yDiff;
3998         }
3999
4000         if(destTrimmedRect.y1 > drawBufferHeight)
4001         {
4002                 int yDiff = destTrimmedRect.y1 - drawBufferHeight;
4003                 destTrimmedRect.y1 = drawBufferHeight;
4004                 sourceTrimmedRect.y1 -= yDiff;
4005         }
4006
4007         bool partialBufferCopy = false;
4008
4009         if(sourceTrimmedRect.y1 - sourceTrimmedRect.y0 < readBufferHeight ||
4010            sourceTrimmedRect.x1 - sourceTrimmedRect.x0 < readBufferWidth ||
4011            destTrimmedRect.y1 - destTrimmedRect.y0 < drawBufferHeight ||
4012            destTrimmedRect.x1 - destTrimmedRect.x0 < drawBufferWidth ||
4013            sourceTrimmedRect.y0 != 0 || destTrimmedRect.y0 != 0 || sourceTrimmedRect.x0 != 0 || destTrimmedRect.x0 != 0)
4014         {
4015                 partialBufferCopy = true;
4016         }
4017
4018         bool sameBounds = (srcX0 == dstX0 && srcY0 == dstY0 && srcX1 == dstX1 && srcY1 == dstY1);
4019         bool blitRenderTarget = false;
4020         bool blitDepth = false;
4021         bool blitStencil = false;
4022
4023         if(mask & GL_COLOR_BUFFER_BIT)
4024         {
4025                 GLenum readColorbufferType = readFramebuffer->getColorbufferType(getReadFramebufferColorIndex());
4026                 GLenum drawColorbufferType = drawFramebuffer->getColorbufferType(0);
4027                 const bool validReadType = readColorbufferType == GL_TEXTURE_2D || Framebuffer::IsRenderbuffer(readColorbufferType);
4028                 const bool validDrawType = drawColorbufferType == GL_TEXTURE_2D || Framebuffer::IsRenderbuffer(drawColorbufferType);
4029                 if(!validReadType || !validDrawType)
4030                 {
4031                         return error(GL_INVALID_OPERATION);
4032                 }
4033
4034                 if(partialBufferCopy && readBufferSamples > 1 && !sameBounds)
4035                 {
4036                         return error(GL_INVALID_OPERATION);
4037                 }
4038
4039                 blitRenderTarget = true;
4040         }
4041
4042         if(mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
4043         {
4044                 Renderbuffer *readDSBuffer = nullptr;
4045                 Renderbuffer *drawDSBuffer = nullptr;
4046
4047                 if(mask & GL_DEPTH_BUFFER_BIT)
4048                 {
4049                         if(readFramebuffer->getDepthbuffer() && drawFramebuffer->getDepthbuffer())
4050                         {
4051                                 GLenum readDepthBufferType = readFramebuffer->getDepthbufferType();
4052                                 GLenum drawDepthBufferType = drawFramebuffer->getDepthbufferType();
4053                                 if((readDepthBufferType != drawDepthBufferType) &&
4054                                    !(Framebuffer::IsRenderbuffer(readDepthBufferType) && Framebuffer::IsRenderbuffer(drawDepthBufferType)))
4055                                 {
4056                                         return error(GL_INVALID_OPERATION);
4057                                 }
4058
4059                                 blitDepth = true;
4060                                 readDSBuffer = readFramebuffer->getDepthbuffer();
4061                                 drawDSBuffer = drawFramebuffer->getDepthbuffer();
4062                         }
4063                 }
4064
4065                 if(mask & GL_STENCIL_BUFFER_BIT)
4066                 {
4067                         if(readFramebuffer->getStencilbuffer() && drawFramebuffer->getStencilbuffer())
4068                         {
4069                                 GLenum readStencilBufferType = readFramebuffer->getStencilbufferType();
4070                                 GLenum drawStencilBufferType = drawFramebuffer->getStencilbufferType();
4071                                 if((readStencilBufferType != drawStencilBufferType) &&
4072                                    !(Framebuffer::IsRenderbuffer(readStencilBufferType) && Framebuffer::IsRenderbuffer(drawStencilBufferType)))
4073                                 {
4074                                         return error(GL_INVALID_OPERATION);
4075                                 }
4076
4077                                 blitStencil = true;
4078                                 readDSBuffer = readFramebuffer->getStencilbuffer();
4079                                 drawDSBuffer = drawFramebuffer->getStencilbuffer();
4080                         }
4081                 }
4082
4083                 if(partialBufferCopy && !allowPartialDepthStencilBlit)
4084                 {
4085                         ERR("Only whole-buffer depth and stencil blits are supported by ANGLE_framebuffer_blit.");
4086                         return error(GL_INVALID_OPERATION);   // Only whole-buffer copies are permitted
4087                 }
4088
4089                 // OpenGL ES 3.0.4 spec, p.199:
4090                 // ...an INVALID_OPERATION error is generated if the formats of the read
4091                 // and draw framebuffers are not identical or if the source and destination
4092                 // rectangles are not defined with the same(X0, Y 0) and (X1, Y 1) bounds.
4093                 // If SAMPLE_BUFFERS for the draw framebuffer is greater than zero, an
4094                 // INVALID_OPERATION error is generated.
4095                 if((drawDSBuffer && drawDSBuffer->getSamples() > 1) ||
4096                    ((readDSBuffer && readDSBuffer->getSamples() > 1) &&
4097                     (!sameBounds || (drawDSBuffer->getFormat() != readDSBuffer->getFormat()))))
4098                 {
4099                         return error(GL_INVALID_OPERATION);
4100                 }
4101         }
4102
4103         if(blitRenderTarget || blitDepth || blitStencil)
4104         {
4105                 if(blitRenderTarget)
4106                 {
4107                         egl::Image *readRenderTarget = readFramebuffer->getReadRenderTarget();
4108                         egl::Image *drawRenderTarget = drawFramebuffer->getRenderTarget(0);
4109
4110                         if(flipX)
4111                         {
4112                                 swap(destRect.x0, destRect.x1);
4113                         }
4114                         if(flipy)
4115                         {
4116                                 swap(destRect.y0, destRect.y1);
4117                         }
4118
4119                         bool success = device->stretchRect(readRenderTarget, &sourceRect, drawRenderTarget, &destRect, (filter ? Device::USE_FILTER : 0) | Device::COLOR_BUFFER);
4120
4121                         readRenderTarget->release();
4122                         drawRenderTarget->release();
4123
4124                         if(!success)
4125                         {
4126                                 ERR("BlitFramebuffer failed.");
4127                                 return;
4128                         }
4129                 }
4130
4131                 if(blitDepth)
4132                 {
4133                         egl::Image *readRenderTarget = readFramebuffer->getDepthBuffer();
4134                         egl::Image *drawRenderTarget = drawFramebuffer->getDepthBuffer();
4135
4136                         bool success = device->stretchRect(readRenderTarget, &sourceRect, drawRenderTarget, &destRect, (filter ? Device::USE_FILTER : 0) | Device::DEPTH_BUFFER);
4137
4138                         readRenderTarget->release();
4139                         drawRenderTarget->release();
4140
4141                         if(!success)
4142                         {
4143                                 ERR("BlitFramebuffer failed.");
4144                                 return;
4145                         }
4146                 }
4147
4148                 if(blitStencil)
4149                 {
4150                         egl::Image *readRenderTarget = readFramebuffer->getStencilBuffer();
4151                         egl::Image *drawRenderTarget = drawFramebuffer->getStencilBuffer();
4152
4153                         bool success = device->stretchRect(readRenderTarget, &sourceRect, drawRenderTarget, &destRect, (filter ? Device::USE_FILTER : 0) | Device::STENCIL_BUFFER);
4154
4155                         readRenderTarget->release();
4156                         drawRenderTarget->release();
4157
4158                         if(!success)
4159                         {
4160                                 ERR("BlitFramebuffer failed.");
4161                                 return;
4162                         }
4163                 }
4164         }
4165 }
4166
4167 void Context::bindTexImage(gl::Surface *surface)
4168 {
4169         es2::Texture2D *textureObject = getTexture2D();
4170
4171         if(textureObject)
4172         {
4173                 textureObject->bindTexImage(surface);
4174         }
4175 }
4176
4177 EGLenum Context::validateSharedImage(EGLenum target, GLuint name, GLuint textureLevel)
4178 {
4179         GLenum textureTarget = GL_NONE;
4180
4181         switch(target)
4182         {
4183         case EGL_GL_TEXTURE_2D_KHR:
4184                 textureTarget = GL_TEXTURE_2D;
4185                 break;
4186         case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR:
4187         case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_X_KHR:
4188         case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Y_KHR:
4189         case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_KHR:
4190         case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Z_KHR:
4191         case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_KHR:
4192                 textureTarget = GL_TEXTURE_CUBE_MAP;
4193                 break;
4194         case EGL_GL_RENDERBUFFER_KHR:
4195                 break;
4196         default:
4197                 return EGL_BAD_PARAMETER;
4198         }
4199
4200         if(textureLevel >= es2::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
4201         {
4202                 return EGL_BAD_MATCH;
4203         }
4204
4205         if(textureTarget != GL_NONE)
4206         {
4207                 es2::Texture *texture = getTexture(name);
4208
4209                 if(!texture || texture->getTarget() != textureTarget)
4210                 {
4211                         return EGL_BAD_PARAMETER;
4212                 }
4213
4214                 if(texture->isShared(textureTarget, textureLevel))   // Bound to an EGLSurface or already an EGLImage sibling
4215                 {
4216                         return EGL_BAD_ACCESS;
4217                 }
4218
4219                 if(textureLevel != 0 && !texture->isSamplerComplete())
4220                 {
4221                         return EGL_BAD_PARAMETER;
4222                 }
4223
4224                 if(textureLevel == 0 && !(texture->isSamplerComplete() && texture->getLevelCount() == 1))
4225                 {
4226                         return EGL_BAD_PARAMETER;
4227                 }
4228         }
4229         else if(target == EGL_GL_RENDERBUFFER_KHR)
4230         {
4231                 es2::Renderbuffer *renderbuffer = getRenderbuffer(name);
4232
4233                 if(!renderbuffer)
4234                 {
4235                         return EGL_BAD_PARAMETER;
4236                 }
4237
4238                 if(renderbuffer->isShared())   // Already an EGLImage sibling
4239                 {
4240                         return EGL_BAD_ACCESS;
4241                 }
4242         }
4243         else UNREACHABLE(target);
4244
4245         return EGL_SUCCESS;
4246 }
4247
4248 egl::Image *Context::createSharedImage(EGLenum target, GLuint name, GLuint textureLevel)
4249 {
4250         GLenum textureTarget = GL_NONE;
4251
4252         switch(target)
4253         {
4254         case EGL_GL_TEXTURE_2D_KHR:                  textureTarget = GL_TEXTURE_2D;                  break;
4255         case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR: textureTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_X; break;
4256         case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_X_KHR: textureTarget = GL_TEXTURE_CUBE_MAP_NEGATIVE_X; break;
4257         case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Y_KHR: textureTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_Y; break;
4258         case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_KHR: textureTarget = GL_TEXTURE_CUBE_MAP_NEGATIVE_Y; break;
4259         case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Z_KHR: textureTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_Z; break;
4260         case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_KHR: textureTarget = GL_TEXTURE_CUBE_MAP_NEGATIVE_Z; break;
4261         }
4262
4263         if(textureTarget != GL_NONE)
4264         {
4265                 es2::Texture *texture = getTexture(name);
4266
4267                 return texture->createSharedImage(textureTarget, textureLevel);
4268         }
4269         else if(target == EGL_GL_RENDERBUFFER_KHR)
4270         {
4271                 es2::Renderbuffer *renderbuffer = getRenderbuffer(name);
4272
4273                 return renderbuffer->createSharedImage();
4274         }
4275         else UNREACHABLE(target);
4276
4277         return nullptr;
4278 }
4279
4280 egl::Image *Context::getSharedImage(GLeglImageOES image)
4281 {
4282         return display->getSharedImage(image);
4283 }
4284
4285 Device *Context::getDevice()
4286 {
4287         return device;
4288 }
4289
4290 const GLubyte *Context::getExtensions(GLuint index, GLuint *numExt) const
4291 {
4292         // Keep list sorted in following order:
4293         // OES extensions
4294         // EXT extensions
4295         // Vendor extensions
4296         static const char *es2extensions[] =
4297         {
4298                 "GL_OES_compressed_ETC1_RGB8_texture",
4299                 "GL_OES_depth24",
4300                 "GL_OES_depth32",
4301                 "GL_OES_depth_texture",
4302                 "GL_OES_depth_texture_cube_map",
4303                 "GL_OES_EGL_image",
4304                 "GL_OES_EGL_image_external",
4305                 "GL_OES_EGL_sync",
4306                 "GL_OES_element_index_uint",
4307                 "GL_OES_framebuffer_object",
4308                 "GL_OES_packed_depth_stencil",
4309                 "GL_OES_rgb8_rgba8",
4310                 "GL_OES_standard_derivatives",
4311                 "GL_OES_texture_float",
4312                 "GL_OES_texture_float_linear",
4313                 "GL_OES_texture_half_float",
4314                 "GL_OES_texture_half_float_linear",
4315                 "GL_OES_texture_npot",
4316                 "GL_OES_texture_3D",
4317                 "GL_EXT_blend_minmax",
4318                 "GL_EXT_color_buffer_half_float",
4319                 "GL_EXT_draw_buffers",
4320                 "GL_EXT_instanced_arrays",
4321                 "GL_EXT_occlusion_query_boolean",
4322                 "GL_EXT_read_format_bgra",
4323 #if (S3TC_SUPPORT)
4324                 "GL_EXT_texture_compression_dxt1",
4325 #endif
4326                 "GL_EXT_texture_filter_anisotropic",
4327                 "GL_EXT_texture_format_BGRA8888",
4328                 "GL_EXT_texture_rg",
4329                 "GL_ANGLE_framebuffer_blit",
4330                 "GL_ANGLE_framebuffer_multisample",
4331                 "GL_ANGLE_instanced_arrays",
4332 #if (S3TC_SUPPORT)
4333                 "GL_ANGLE_texture_compression_dxt3",
4334                 "GL_ANGLE_texture_compression_dxt5",
4335 #endif
4336                 "GL_CHROMIUM_texture_filtering_hint",
4337                 "GL_NV_fence",
4338                 "GL_NV_framebuffer_blit",
4339                 "GL_NV_read_depth",
4340         };
4341
4342         // Extensions exclusive to OpenGL ES 3.0 and above.
4343         static const char *es3extensions[] =
4344         {
4345                 "GL_EXT_color_buffer_float",
4346         };
4347
4348         GLuint numES2extensions = sizeof(es2extensions) / sizeof(es2extensions[0]);
4349         GLuint numExtensions = numES2extensions;
4350
4351         if(clientVersion >= 3)
4352         {
4353                 numExtensions += sizeof(es3extensions) / sizeof(es3extensions[0]);
4354         }
4355
4356         if(numExt)
4357         {
4358                 *numExt = numExtensions;
4359
4360                 return nullptr;
4361         }
4362
4363         if(index == GL_INVALID_INDEX)
4364         {
4365                 static std::string extensionsCat;
4366
4367                 if(extensionsCat.empty() && (numExtensions > 0))
4368                 {
4369                         for(const char *extension : es2extensions)
4370                         {
4371                                 extensionsCat += std::string(extension) + " ";
4372                         }
4373                 }
4374
4375                 return (const GLubyte*)extensionsCat.c_str();
4376         }
4377
4378         if(index >= numExtensions)
4379         {
4380                 return nullptr;
4381         }
4382
4383         if(index < numES2extensions)
4384         {
4385                 return (const GLubyte*)es2extensions[index];
4386         }
4387         else
4388         {
4389                 return (const GLubyte*)es3extensions[index - numES2extensions];
4390         }
4391 }
4392
4393 }
4394
4395 egl::Context *es2CreateContext(egl::Display *display, const egl::Context *shareContext, int clientVersion, const egl::Config *config)
4396 {
4397         ASSERT(!shareContext || shareContext->getClientVersion() == clientVersion);   // Should be checked by eglCreateContext
4398         return new es2::Context(display, static_cast<const es2::Context*>(shareContext), clientVersion, config);
4399 }