src/OpenGL/libGLESv2/Context.h

   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.h: Defines the Context class, managing all GL state and performing
  16 // rendering operations. It is the GLES2 specific implementation of EGLContext.
  17
  18 #ifndef LIBGLESV2_CONTEXT_H_
  19 #define LIBGLESV2_CONTEXT_H_
  20
  21 #include "ResourceManager.h"
  22 #include "Buffer.h"
  23 #include "libEGL/Context.hpp"
  24 #include "common/NameSpace.hpp"
  25 #include "common/Object.hpp"
  26 #include "common/Image.hpp"
  27 #include "Renderer/Sampler.hpp"
  28
  29 #include <GLES2/gl2.h>
  30 #include <GLES2/gl2ext.h>
  31 #include <GLES3/gl3.h>
  32 #include <EGL/egl.h>
  33
  34 #include <map>
  35 #include <string>
  36
  37 namespace egl
  38 {
  39 class Display;
  40 class Surface;
  41 class Config;
  42 }
  43
  44 namespace es2
  45 {
  46 struct TranslatedAttribute;
  47 struct TranslatedIndexData;
  48
  49 class Device;
  50 class Shader;
  51 class Program;
  52 class Texture;
  53 class Texture2D;
  54 class Texture3D;
  55 class Texture2DArray;
  56 class TextureCubeMap;
  57 class TextureExternal;
  58 class Framebuffer;
  59 class Renderbuffer;
  60 class RenderbufferStorage;
  61 class Colorbuffer;
  62 class Depthbuffer;
  63 class StreamingIndexBuffer;
  64 class Stencilbuffer;
  65 class DepthStencilbuffer;
  66 class VertexDataManager;
  67 class IndexDataManager;
  68 class Fence;
  69 class FenceSync;
  70 class Query;
  71 class Sampler;
  72 class VertexArray;
  73 class TransformFeedback;
  74
  75 enum
  76 {
  77         MAX_VERTEX_ATTRIBS = sw::VERTEX_ATTRIBUTES,
  78         MAX_UNIFORM_VECTORS = 256,   // Device limit
  79         MAX_VERTEX_UNIFORM_VECTORS = sw::VERTEX_UNIFORM_VECTORS - 3,   // Reserve space for gl_DepthRange
  80         MAX_VARYING_VECTORS = 10,
  81         MAX_TEXTURE_IMAGE_UNITS = sw::TEXTURE_IMAGE_UNITS,
  82         MAX_VERTEX_TEXTURE_IMAGE_UNITS = sw::VERTEX_TEXTURE_IMAGE_UNITS,
  83         MAX_COMBINED_TEXTURE_IMAGE_UNITS = MAX_TEXTURE_IMAGE_UNITS + MAX_VERTEX_TEXTURE_IMAGE_UNITS,
  84         MAX_FRAGMENT_UNIFORM_VECTORS = sw::FRAGMENT_UNIFORM_VECTORS - 3,    // Reserve space for gl_DepthRange
  85         MAX_ELEMENT_INDEX = 0x7FFFFFFF,
  86         MAX_ELEMENTS_INDICES = 0x7FFFFFFF,
  87         MAX_ELEMENTS_VERTICES = 0x7FFFFFFF,
  88         MAX_VERTEX_OUTPUT_VECTORS = 16,
  89         MAX_FRAGMENT_INPUT_VECTORS = 15,
  90         MIN_PROGRAM_TEXEL_OFFSET = -8,
  91         MAX_PROGRAM_TEXEL_OFFSET = 7,
  92         MAX_DRAW_BUFFERS = sw::RENDERTARGETS,
  93         MAX_COLOR_ATTACHMENTS = MAX(MAX_DRAW_BUFFERS, 8),
  94         MAX_FRAGMENT_UNIFORM_BLOCKS = sw::MAX_FRAGMENT_UNIFORM_BLOCKS,
  95         MAX_VERTEX_UNIFORM_BLOCKS = sw::MAX_VERTEX_UNIFORM_BLOCKS,
  96         MAX_FRAGMENT_UNIFORM_COMPONENTS = sw::FRAGMENT_UNIFORM_VECTORS * 4,
  97         MAX_VERTEX_UNIFORM_COMPONENTS = sw::VERTEX_UNIFORM_VECTORS * 4,
  98         MAX_UNIFORM_BLOCK_SIZE = sw::MAX_UNIFORM_BLOCK_SIZE,
  99         MAX_FRAGMENT_UNIFORM_BLOCKS_COMPONENTS = sw::MAX_FRAGMENT_UNIFORM_BLOCKS * MAX_UNIFORM_BLOCK_SIZE / 4,
 100         MAX_VERTEX_UNIFORM_BLOCKS_COMPONENTS = MAX_VERTEX_UNIFORM_BLOCKS * MAX_UNIFORM_BLOCK_SIZE / 4,
 101         MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS = MAX_FRAGMENT_UNIFORM_BLOCKS_COMPONENTS + MAX_FRAGMENT_UNIFORM_COMPONENTS,
 102         MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS = MAX_VERTEX_UNIFORM_BLOCKS_COMPONENTS + MAX_VERTEX_UNIFORM_COMPONENTS,
 103         MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS = 4,
 104         MAX_UNIFORM_BUFFER_BINDINGS = sw::MAX_UNIFORM_BUFFER_BINDINGS,
 105         UNIFORM_BUFFER_OFFSET_ALIGNMENT = 1,
 106 };
 107
 108 const GLenum compressedTextureFormats[] =
 109 {
 110         GL_ETC1_RGB8_OES,
 111 #if (S3TC_SUPPORT)
 112         GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
 113         GL_COMPRESSED_RGBA_S3TC_DXT1_EXT,
 114         GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE,
 115         GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE,
 116 #endif
 117 #if (GL_ES_VERSION_3_0)
 118         GL_COMPRESSED_R11_EAC,
 119         GL_COMPRESSED_SIGNED_R11_EAC,
 120         GL_COMPRESSED_RG11_EAC,
 121         GL_COMPRESSED_SIGNED_RG11_EAC,
 122         GL_COMPRESSED_RGB8_ETC2,
 123         GL_COMPRESSED_SRGB8_ETC2,
 124         GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2,
 125         GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2,
 126         GL_COMPRESSED_RGBA8_ETC2_EAC,
 127         GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC,
 128         GL_COMPRESSED_RGBA_ASTC_4x4_KHR,
 129         GL_COMPRESSED_RGBA_ASTC_5x4_KHR,
 130         GL_COMPRESSED_RGBA_ASTC_5x5_KHR,
 131         GL_COMPRESSED_RGBA_ASTC_6x5_KHR,
 132         GL_COMPRESSED_RGBA_ASTC_6x6_KHR,
 133         GL_COMPRESSED_RGBA_ASTC_8x5_KHR,
 134         GL_COMPRESSED_RGBA_ASTC_8x6_KHR,
 135         GL_COMPRESSED_RGBA_ASTC_8x8_KHR,
 136         GL_COMPRESSED_RGBA_ASTC_10x5_KHR,
 137         GL_COMPRESSED_RGBA_ASTC_10x6_KHR,
 138         GL_COMPRESSED_RGBA_ASTC_10x8_KHR,
 139         GL_COMPRESSED_RGBA_ASTC_10x10_KHR,
 140         GL_COMPRESSED_RGBA_ASTC_12x10_KHR,
 141         GL_COMPRESSED_RGBA_ASTC_12x12_KHR,
 142         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR,
 143         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR,
 144         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR,
 145         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR,
 146         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR,
 147         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR,
 148         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR,
 149         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR,
 150         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR,
 151         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR,
 152         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR,
 153         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR,
 154         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR,
 155         GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR,
 156 #endif
 157 };
 158
 159 const GLint NUM_COMPRESSED_TEXTURE_FORMATS = sizeof(compressedTextureFormats) / sizeof(compressedTextureFormats[0]);
 160
 161 const GLint multisampleCount[] = {4, 2, 1};
 162 const GLint NUM_MULTISAMPLE_COUNTS = sizeof(multisampleCount) / sizeof(multisampleCount[0]);
 163 const GLint IMPLEMENTATION_MAX_SAMPLES = multisampleCount[0];
 164
 165 const float ALIASED_LINE_WIDTH_RANGE_MIN = 1.0f;
 166 const float ALIASED_LINE_WIDTH_RANGE_MAX = 1.0f;
 167 const float ALIASED_POINT_SIZE_RANGE_MIN = 0.125f;
 168 const float ALIASED_POINT_SIZE_RANGE_MAX = 8192.0f;
 169 const float MAX_TEXTURE_MAX_ANISOTROPY = 16.0f;
 170
 171 enum QueryType
 172 {
 173         QUERY_ANY_SAMPLES_PASSED,
 174         QUERY_ANY_SAMPLES_PASSED_CONSERVATIVE,
 175         QUERY_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN,
 176
 177         QUERY_TYPE_COUNT
 178 };
 179
 180 struct Color
 181 {
 182         float red;
 183         float green;
 184         float blue;
 185         float alpha;
 186 };
 187
 188 // Helper structure describing a single vertex attribute
 189 class VertexAttribute
 190 {
 191 public:
 192         VertexAttribute() : mType(GL_FLOAT), mSize(0), mNormalized(false), mStride(0), mDivisor(0), mPointer(nullptr), mArrayEnabled(false)
 193         {
 194                 mCurrentValue[0].f = 0.0f;
 195                 mCurrentValue[1].f = 0.0f;
 196                 mCurrentValue[2].f = 0.0f;
 197                 mCurrentValue[3].f = 1.0f;
 198                 mCurrentValueType = ValueUnion::FloatType;
 199         }
 200
 201         int typeSize() const
 202         {
 203                 switch(mType)
 204                 {
 205                 case GL_BYTE:           return mSize * sizeof(GLbyte);
 206                 case GL_UNSIGNED_BYTE:  return mSize * sizeof(GLubyte);
 207                 case GL_SHORT:          return mSize * sizeof(GLshort);
 208                 case GL_UNSIGNED_SHORT: return mSize * sizeof(GLushort);
 209                 case GL_INT:            return mSize * sizeof(GLint);
 210                 case GL_UNSIGNED_INT:   return mSize * sizeof(GLuint);
 211                 case GL_FIXED:          return mSize * sizeof(GLfixed);
 212                 case GL_FLOAT:          return mSize * sizeof(GLfloat);
 213                 default: UNREACHABLE(mType); return mSize * sizeof(GLfloat);
 214                 }
 215         }
 216
 217         GLsizei stride() const
 218         {
 219                 return mStride ? mStride : typeSize();
 220         }
 221
 222         inline float getCurrentValueBitsAsFloat(int i) const
 223         {
 224                 return mCurrentValue[i].f;
 225         }
 226
 227         inline float getCurrentValueF(int i) const
 228         {
 229                 switch(mCurrentValueType)
 230                 {
 231                 case ValueUnion::FloatType:     return mCurrentValue[i].f;
 232                 case ValueUnion::IntType:       return static_cast<float>(mCurrentValue[i].i);
 233                 case ValueUnion::UIntType:      return static_cast<float>(mCurrentValue[i].ui);
 234                 default: UNREACHABLE(mCurrentValueType); return mCurrentValue[i].f;
 235                 }
 236         }
 237
 238         inline GLint getCurrentValueI(int i) const
 239         {
 240                 switch(mCurrentValueType)
 241                 {
 242                 case ValueUnion::FloatType:     return static_cast<GLint>(mCurrentValue[i].f);
 243                 case ValueUnion::IntType:       return mCurrentValue[i].i;
 244                 case ValueUnion::UIntType:      return static_cast<GLint>(mCurrentValue[i].ui);
 245                 default: UNREACHABLE(mCurrentValueType); return mCurrentValue[i].i;
 246                 }
 247         }
 248
 249         inline GLuint getCurrentValueUI(int i) const
 250         {
 251                 switch(mCurrentValueType)
 252                 {
 253                 case ValueUnion::FloatType:     return static_cast<GLuint>(mCurrentValue[i].f);
 254                 case ValueUnion::IntType:       return static_cast<GLuint>(mCurrentValue[i].i);
 255                 case ValueUnion::UIntType:      return mCurrentValue[i].ui;
 256                 default: UNREACHABLE(mCurrentValueType); return mCurrentValue[i].ui;
 257                 }
 258         }
 259
 260         inline void setCurrentValue(const GLfloat *values)
 261         {
 262                 mCurrentValue[0].f = values[0];
 263                 mCurrentValue[1].f = values[1];
 264                 mCurrentValue[2].f = values[2];
 265                 mCurrentValue[3].f = values[3];
 266                 mCurrentValueType = ValueUnion::FloatType;
 267         }
 268
 269         inline void setCurrentValue(const GLint *values)
 270         {
 271                 mCurrentValue[0].i = values[0];
 272                 mCurrentValue[1].i = values[1];
 273                 mCurrentValue[2].i = values[2];
 274                 mCurrentValue[3].i = values[3];
 275                 mCurrentValueType = ValueUnion::IntType;
 276         }
 277
 278         inline void setCurrentValue(const GLuint *values)
 279         {
 280                 mCurrentValue[0].ui = values[0];
 281                 mCurrentValue[1].ui = values[1];
 282                 mCurrentValue[2].ui = values[2];
 283                 mCurrentValue[3].ui = values[3];
 284                 mCurrentValueType = ValueUnion::UIntType;
 285         }
 286
 287         // From glVertexAttribPointer
 288         GLenum mType;
 289         GLint mSize;
 290         bool mNormalized;
 291         GLsizei mStride;   // 0 means natural stride
 292         GLuint mDivisor;   // From glVertexAttribDivisor
 293
 294         union
 295         {
 296                 const void *mPointer;
 297                 intptr_t mOffset;
 298         };
 299
 300         gl::BindingPointer<Buffer> mBoundBuffer;   // Captured when glVertexAttribPointer is called.
 301
 302         bool mArrayEnabled;   // From glEnable/DisableVertexAttribArray
 303
 304 private:
 305         union ValueUnion
 306         {
 307                 enum Type { FloatType, IntType, UIntType };
 308
 309                 float f;
 310                 GLint i;
 311                 GLuint ui;
 312         };
 313
 314         ValueUnion mCurrentValue[4];   // From glVertexAttrib
 315         ValueUnion::Type mCurrentValueType;
 316 };
 317
 318 typedef VertexAttribute VertexAttributeArray[MAX_VERTEX_ATTRIBS];
 319
 320 // Helper structure to store all raw state
 321 struct State
 322 {
 323         Color colorClearValue;
 324         GLclampf depthClearValue;
 325         int stencilClearValue;
 326
 327         bool cullFaceEnabled;
 328         GLenum cullMode;
 329         GLenum frontFace;
 330         bool depthTestEnabled;
 331         GLenum depthFunc;
 332         bool blendEnabled;
 333         GLenum sourceBlendRGB;
 334         GLenum destBlendRGB;
 335         GLenum sourceBlendAlpha;
 336         GLenum destBlendAlpha;
 337         GLenum blendEquationRGB;
 338         GLenum blendEquationAlpha;
 339         Color blendColor;
 340         bool stencilTestEnabled;
 341         GLenum stencilFunc;
 342         GLint stencilRef;
 343         GLuint stencilMask;
 344         GLenum stencilFail;
 345         GLenum stencilPassDepthFail;
 346         GLenum stencilPassDepthPass;
 347         GLuint stencilWritemask;
 348         GLenum stencilBackFunc;
 349         GLint stencilBackRef;
 350         GLuint stencilBackMask;
 351         GLenum stencilBackFail;
 352         GLenum stencilBackPassDepthFail;
 353         GLenum stencilBackPassDepthPass;
 354         GLuint stencilBackWritemask;
 355         bool polygonOffsetFillEnabled;
 356         GLfloat polygonOffsetFactor;
 357         GLfloat polygonOffsetUnits;
 358         bool sampleAlphaToCoverageEnabled;
 359         bool sampleCoverageEnabled;
 360         GLclampf sampleCoverageValue;
 361         bool sampleCoverageInvert;
 362         bool scissorTestEnabled;
 363         bool ditherEnabled;
 364         bool primitiveRestartFixedIndexEnabled;
 365         bool rasterizerDiscardEnabled;
 366         bool colorLogicOpEnabled;
 367         GLenum logicalOperation;
 368
 369         GLfloat lineWidth;
 370
 371         GLenum generateMipmapHint;
 372         GLenum fragmentShaderDerivativeHint;
 373
 374         GLint viewportX;
 375         GLint viewportY;
 376         GLsizei viewportWidth;
 377         GLsizei viewportHeight;
 378         float zNear;
 379         float zFar;
 380
 381         GLint scissorX;
 382         GLint scissorY;
 383         GLsizei scissorWidth;
 384         GLsizei scissorHeight;
 385
 386         bool colorMaskRed;
 387         bool colorMaskGreen;
 388         bool colorMaskBlue;
 389         bool colorMaskAlpha;
 390         bool depthMask;
 391
 392         unsigned int activeSampler;   // Active texture unit selector - GL_TEXTURE0
 393         gl::BindingPointer<Buffer> arrayBuffer;
 394         gl::BindingPointer<Buffer> copyReadBuffer;
 395         gl::BindingPointer<Buffer> copyWriteBuffer;
 396         gl::BindingPointer<Buffer> pixelPackBuffer;
 397         gl::BindingPointer<Buffer> pixelUnpackBuffer;
 398         gl::BindingPointer<Buffer> genericUniformBuffer;
 399         BufferBinding uniformBuffers[MAX_UNIFORM_BUFFER_BINDINGS];
 400
 401         GLuint readFramebuffer;
 402         GLuint drawFramebuffer;
 403         gl::BindingPointer<Renderbuffer> renderbuffer;
 404         GLuint currentProgram;
 405         GLuint vertexArray;
 406         GLuint transformFeedback;
 407         gl::BindingPointer<Sampler> sampler[MAX_COMBINED_TEXTURE_IMAGE_UNITS];
 408
 409         VertexAttribute vertexAttribute[MAX_VERTEX_ATTRIBS];
 410         gl::BindingPointer<Texture> samplerTexture[TEXTURE_TYPE_COUNT][MAX_COMBINED_TEXTURE_IMAGE_UNITS];
 411         gl::BindingPointer<Query> activeQuery[QUERY_TYPE_COUNT];
 412
 413         egl::Image::UnpackInfo unpackInfo;
 414         GLint packAlignment;
 415         GLint packRowLength;
 416         GLint packImageHeight;
 417         GLint packSkipPixels;
 418         GLint packSkipRows;
 419         GLint packSkipImages;
 420 };
 421
 422 class Context : public egl::Context
 423 {
 424 public:
 425         Context(const egl::Config *config, const Context *shareContext, EGLint clientVersion);
 426
 427         virtual void makeCurrent(egl::Surface *surface);
 428         virtual EGLint getClientVersion() const;
 429
 430         void markAllStateDirty();
 431
 432         // State manipulation
 433         void setClearColor(float red, float green, float blue, float alpha);
 434         void setClearDepth(float depth);
 435         void setClearStencil(int stencil);
 436
 437         void setCullFaceEnabled(bool enabled);
 438         bool isCullFaceEnabled() const;
 439         void setCullMode(GLenum mode);
 440         void setFrontFace(GLenum front);
 441
 442         void setDepthTestEnabled(bool enabled);
 443         bool isDepthTestEnabled() const;
 444         void setDepthFunc(GLenum depthFunc);
 445         void setDepthRange(float zNear, float zFar);
 446
 447         void setBlendEnabled(bool enabled);
 448         bool isBlendEnabled() const;
 449         void setBlendFactors(GLenum sourceRGB, GLenum destRGB, GLenum sourceAlpha, GLenum destAlpha);
 450         void setBlendColor(float red, float green, float blue, float alpha);
 451         void setBlendEquation(GLenum rgbEquation, GLenum alphaEquation);
 452
 453         void setStencilTestEnabled(bool enabled);
 454         bool isStencilTestEnabled() const;
 455         void setStencilParams(GLenum stencilFunc, GLint stencilRef, GLuint stencilMask);
 456         void setStencilBackParams(GLenum stencilBackFunc, GLint stencilBackRef, GLuint stencilBackMask);
 457         void setStencilWritemask(GLuint stencilWritemask);
 458         void setStencilBackWritemask(GLuint stencilBackWritemask);
 459         void setStencilOperations(GLenum stencilFail, GLenum stencilPassDepthFail, GLenum stencilPassDepthPass);
 460         void setStencilBackOperations(GLenum stencilBackFail, GLenum stencilBackPassDepthFail, GLenum stencilBackPassDepthPass);
 461
 462         void setPolygonOffsetFillEnabled(bool enabled);
 463         bool isPolygonOffsetFillEnabled() const;
 464         void setPolygonOffsetParams(GLfloat factor, GLfloat units);
 465
 466         void setSampleAlphaToCoverageEnabled(bool enabled);
 467         bool isSampleAlphaToCoverageEnabled() const;
 468         void setSampleCoverageEnabled(bool enabled);
 469         bool isSampleCoverageEnabled() const;
 470         void setSampleCoverageParams(GLclampf value, bool invert);
 471
 472         void setDitherEnabled(bool enabled);
 473         bool isDitherEnabled() const;
 474
 475         void setPrimitiveRestartFixedIndexEnabled(bool enabled);
 476         bool isPrimitiveRestartFixedIndexEnabled() const;
 477
 478         void setRasterizerDiscardEnabled(bool enabled);
 479         bool isRasterizerDiscardEnabled() const;
 480
 481         void setLineWidth(GLfloat width);
 482
 483         void setGenerateMipmapHint(GLenum hint);
 484         void setFragmentShaderDerivativeHint(GLenum hint);
 485
 486         void setViewportParams(GLint x, GLint y, GLsizei width, GLsizei height);
 487
 488         void setScissorTestEnabled(bool enabled);
 489         bool isScissorTestEnabled() const;
 490         void setScissorParams(GLint x, GLint y, GLsizei width, GLsizei height);
 491
 492         void setColorMask(bool red, bool green, bool blue, bool alpha);
 493         unsigned int getColorMask() const;
 494         void setDepthMask(bool mask);
 495
 496         void setActiveSampler(unsigned int active);
 497
 498         GLuint getReadFramebufferName() const;
 499         GLuint getDrawFramebufferName() const;
 500         GLuint getRenderbufferName() const;
 501
 502         void setFramebufferReadBuffer(GLenum buf);
 503         void setFramebufferDrawBuffers(GLsizei n, const GLenum *bufs);
 504         GLuint getReadFramebufferColorIndex() const;
 505
 506         GLuint getActiveQuery(GLenum target) const;
 507
 508         GLuint getArrayBufferName() const;
 509         GLuint getElementArrayBufferName() const;
 510
 511         void setVertexAttribArrayEnabled(unsigned int attribNum, bool enabled);
 512         void setVertexAttribDivisor(unsigned int attribNum, GLuint divisor);
 513         const VertexAttribute &getVertexAttribState(unsigned int attribNum) const;
 514         void setVertexAttribState(unsigned int attribNum, Buffer *boundBuffer, GLint size, GLenum type,
 515                                   bool normalized, GLsizei stride, const void *pointer);
 516         const void *getVertexAttribPointer(unsigned int attribNum) const;
 517
 518         const VertexAttributeArray &getVertexArrayAttributes();
 519         // Context attribute current values can be queried independently from VAO current values
 520         const VertexAttributeArray &getCurrentVertexAttributes();
 521
 522         void setUnpackAlignment(GLint alignment);
 523         void setUnpackRowLength(GLint rowLength);
 524         void setUnpackImageHeight(GLint imageHeight);
 525         void setUnpackSkipPixels(GLint skipPixels);
 526         void setUnpackSkipRows(GLint skipRows);
 527         void setUnpackSkipImages(GLint skipImages);
 528         const egl::Image::UnpackInfo& getUnpackInfo() const;
 529
 530         void setPackAlignment(GLint alignment);
 531         void setPackRowLength(GLint rowLength);
 532         void setPackImageHeight(GLint imageHeight);
 533         void setPackSkipPixels(GLint skipPixels);
 534         void setPackSkipRows(GLint skipRows);
 535         void setPackSkipImages(GLint skipImages);
 536
 537         // These create and destroy methods are merely pass-throughs to
 538         // ResourceManager, which owns these object types
 539         GLuint createBuffer();
 540         GLuint createShader(GLenum type);
 541         GLuint createProgram();
 542         GLuint createTexture();
 543         GLuint createRenderbuffer();
 544         GLuint createSampler();
 545         GLsync createFenceSync(GLenum condition, GLbitfield flags);
 546
 547         void deleteBuffer(GLuint buffer);
 548         void deleteShader(GLuint shader);
 549         void deleteProgram(GLuint program);
 550         void deleteTexture(GLuint texture);
 551         void deleteRenderbuffer(GLuint renderbuffer);
 552         void deleteSampler(GLuint sampler);
 553         void deleteFenceSync(GLsync fenceSync);
 554
 555         // Framebuffers are owned by the Context, so these methods do not pass through
 556         GLuint createFramebuffer();
 557         void deleteFramebuffer(GLuint framebuffer);
 558
 559         // Fences are owned by the Context
 560         GLuint createFence();
 561         void deleteFence(GLuint fence);
 562
 563         // Queries are owned by the Context
 564         GLuint createQuery();
 565         void deleteQuery(GLuint query);
 566
 567         // Vertex arrays are owned by the Context
 568         GLuint createVertexArray();
 569         void deleteVertexArray(GLuint array);
 570
 571         // Transform feedbacks are owned by the Context
 572         GLuint createTransformFeedback();
 573         void deleteTransformFeedback(GLuint transformFeedback);
 574
 575         void bindArrayBuffer(GLuint buffer);
 576         void bindElementArrayBuffer(GLuint buffer);
 577         void bindCopyReadBuffer(GLuint buffer);
 578         void bindCopyWriteBuffer(GLuint buffer);
 579         void bindPixelPackBuffer(GLuint buffer);
 580         void bindPixelUnpackBuffer(GLuint buffer);
 581         void bindTransformFeedbackBuffer(GLuint buffer);
 582         void bindTexture2D(GLuint texture);
 583         void bindTextureCubeMap(GLuint texture);
 584         void bindTextureExternal(GLuint texture);
 585         void bindTexture3D(GLuint texture);
 586         void bindTexture2DArray(GLuint texture);
 587         void bindReadFramebuffer(GLuint framebuffer);
 588         void bindDrawFramebuffer(GLuint framebuffer);
 589         void bindRenderbuffer(GLuint renderbuffer);
 590         void bindVertexArray(GLuint array);
 591         void bindGenericUniformBuffer(GLuint buffer);
 592         void bindIndexedUniformBuffer(GLuint buffer, GLuint index, GLintptr offset, GLsizeiptr size);
 593         void bindGenericTransformFeedbackBuffer(GLuint buffer);
 594         void bindIndexedTransformFeedbackBuffer(GLuint buffer, GLuint index, GLintptr offset, GLsizeiptr size);
 595         void bindTransformFeedback(GLuint transformFeedback);
 596         bool bindSampler(GLuint unit, GLuint sampler);
 597         void useProgram(GLuint program);
 598
 599         void beginQuery(GLenum target, GLuint query);
 600         void endQuery(GLenum target);
 601
 602         void setFramebufferZero(Framebuffer *framebuffer);
 603
 604         void setRenderbufferStorage(RenderbufferStorage *renderbuffer);
 605
 606         void setVertexAttrib(GLuint index, const GLfloat *values);
 607         void setVertexAttrib(GLuint index, const GLint *values);
 608         void setVertexAttrib(GLuint index, const GLuint *values);
 609
 610         Buffer *getBuffer(GLuint handle) const;
 611         Fence *getFence(GLuint handle) const;
 612         FenceSync *getFenceSync(GLsync handle) const;
 613         Shader *getShader(GLuint handle) const;
 614         Program *getProgram(GLuint handle) const;
 615         virtual Texture *getTexture(GLuint handle) const;
 616         Framebuffer *getFramebuffer(GLuint handle) const;
 617         virtual Renderbuffer *getRenderbuffer(GLuint handle) const;
 618         Query *getQuery(GLuint handle) const;
 619         VertexArray *getVertexArray(GLuint array) const;
 620         VertexArray *getCurrentVertexArray() const;
 621         bool isVertexArray(GLuint array) const;
 622         TransformFeedback *getTransformFeedback(GLuint transformFeedback) const;
 623         TransformFeedback *getTransformFeedback() const;
 624         Sampler *getSampler(GLuint sampler) const;
 625         bool isSampler(GLuint sampler) const;
 626
 627         Buffer *getArrayBuffer() const;
 628         Buffer *getElementArrayBuffer() const;
 629         Buffer *getCopyReadBuffer() const;
 630         Buffer *getCopyWriteBuffer() const;
 631         Buffer *getPixelPackBuffer() const;
 632         Buffer *getPixelUnpackBuffer() const;
 633         Buffer *getGenericUniformBuffer() const;
 634         bool getBuffer(GLenum target, es2::Buffer **buffer) const;
 635         Program *getCurrentProgram() const;
 636         Texture2D *getTexture2D() const;
 637         Texture3D *getTexture3D() const;
 638         Texture2DArray *getTexture2DArray() const;
 639         TextureCubeMap *getTextureCubeMap() const;
 640         TextureExternal *getTextureExternal() const;
 641         Texture *getSamplerTexture(unsigned int sampler, TextureType type) const;
 642         Framebuffer *getReadFramebuffer() const;
 643         Framebuffer *getDrawFramebuffer() const;
 644
 645         bool getFloatv(GLenum pname, GLfloat *params) const;
 646         template<typename T> bool getIntegerv(GLenum pname, T *params) const;
 647         bool getBooleanv(GLenum pname, GLboolean *params) const;
 648         template<typename T> bool getTransformFeedbackiv(GLuint index, GLenum pname, T *param) const;
 649         template<typename T> bool getUniformBufferiv(GLuint index, GLenum pname, T *param) const;
 650         void samplerParameteri(GLuint sampler, GLenum pname, GLint param);
 651         void samplerParameterf(GLuint sampler, GLenum pname, GLfloat param);
 652         GLint getSamplerParameteri(GLuint sampler, GLenum pname);
 653         GLfloat getSamplerParameterf(GLuint sampler, GLenum pname);
 654
 655         bool getQueryParameterInfo(GLenum pname, GLenum *type, unsigned int *numParams) const;
 656
 657         bool hasZeroDivisor() const;
 658
 659         void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLsizei *bufSize, void* pixels);
 660         void clear(GLbitfield mask);
 661         void clearColorBuffer(GLint drawbuffer, const GLint *value);
 662         void clearColorBuffer(GLint drawbuffer, const GLuint *value);
 663         void clearColorBuffer(GLint drawbuffer, const GLfloat *value);
 664         void clearDepthBuffer(const GLfloat value);
 665         void clearStencilBuffer(const GLint value);
 666         void drawArrays(GLenum mode, GLint first, GLsizei count, GLsizei instanceCount = 1);
 667         void drawElements(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const void *indices, GLsizei instanceCount = 1);
 668         void finish();
 669         void flush();
 670
 671         void recordInvalidEnum();
 672         void recordInvalidValue();
 673         void recordInvalidOperation();
 674         void recordOutOfMemory();
 675         void recordInvalidFramebufferOperation();
 676
 677         GLenum getError();
 678
 679         static int getSupportedMultisampleCount(int requested);
 680
 681         void blitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
 682                              GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
 683                              GLbitfield mask);
 684
 685         virtual void bindTexImage(egl::Surface *surface);
 686         virtual EGLenum validateSharedImage(EGLenum target, GLuint name, GLuint textureLevel);
 687         virtual egl::Image *createSharedImage(EGLenum target, GLuint name, GLuint textureLevel);
 688
 689         Device *getDevice();
 690
 691         const GLubyte* getExtensions(GLuint index, GLuint* numExt = nullptr) const;
 692
 693 private:
 694         virtual ~Context();
 695
 696         void applyScissor(int width, int height);
 697         bool applyRenderTarget();
 698         void applyState(GLenum drawMode);
 699         GLenum applyVertexBuffer(GLint base, GLint first, GLsizei count, GLsizei instanceId);
 700         GLenum applyIndexBuffer(const void *indices, GLuint start, GLuint end, GLsizei count, GLenum mode, GLenum type, TranslatedIndexData *indexInfo);
 701         void applyShaders();
 702         void applyTextures();
 703         void applyTextures(sw::SamplerType type);
 704         void applyTexture(sw::SamplerType type, int sampler, Texture *texture);
 705         void clearColorBuffer(GLint drawbuffer, void *value, sw::Format format);
 706
 707         void detachBuffer(GLuint buffer);
 708         void detachTexture(GLuint texture);
 709         void detachFramebuffer(GLuint framebuffer);
 710         void detachRenderbuffer(GLuint renderbuffer);
 711         void detachSampler(GLuint sampler);
 712
 713         bool cullSkipsDraw(GLenum drawMode);
 714         bool isTriangleMode(GLenum drawMode);
 715
 716         Query *createQuery(GLuint handle, GLenum type);
 717
 718         const EGLint clientVersion;
 719         const egl::Config *const mConfig;
 720
 721         State mState;
 722
 723         gl::BindingPointer<Texture2D> mTexture2DZero;
 724         gl::BindingPointer<Texture3D> mTexture3DZero;
 725         gl::BindingPointer<Texture2DArray> mTexture2DArrayZero;
 726         gl::BindingPointer<TextureCubeMap> mTextureCubeMapZero;
 727         gl::BindingPointer<TextureExternal> mTextureExternalZero;
 728
 729         gl::NameSpace<Framebuffer> mFramebufferNameSpace;
 730         gl::NameSpace<Fence, 0> mFenceNameSpace;
 731         gl::NameSpace<Query> mQueryNameSpace;
 732         gl::NameSpace<VertexArray> mVertexArrayNameSpace;
 733         gl::NameSpace<TransformFeedback> mTransformFeedbackNameSpace;
 734
 735         VertexDataManager *mVertexDataManager;
 736         IndexDataManager *mIndexDataManager;
 737
 738         // Recorded errors
 739         bool mInvalidEnum;
 740         bool mInvalidValue;
 741         bool mInvalidOperation;
 742         bool mOutOfMemory;
 743         bool mInvalidFramebufferOperation;
 744
 745         bool mHasBeenCurrent;
 746
 747         unsigned int mAppliedProgramSerial;
 748
 749         // state caching flags
 750         bool mDepthStateDirty;
 751         bool mMaskStateDirty;
 752         bool mBlendStateDirty;
 753         bool mStencilStateDirty;
 754         bool mPolygonOffsetStateDirty;
 755         bool mSampleStateDirty;
 756         bool mFrontFaceDirty;
 757         bool mDitherStateDirty;
 758
 759         Device *device;
 760         ResourceManager *mResourceManager;
 761 };
 762 }
 763
 764 #endif   // INCLUDE_CONTEXT_H_