src/mesa/drivers/dri/i915/i915_state.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include "main/glheader.h"
  30 #include "main/context.h"
  31 #include "main/macros.h"
  32 #include "main/enums.h"
  33 #include "main/fbobject.h"
  34 #include "main/dd.h"
  35 #include "main/state.h"
  36 #include "tnl/tnl.h"
  37 #include "tnl/t_context.h"
  38
  39 #include "drivers/common/driverfuncs.h"
  40
  41 #include "intel_fbo.h"
  42 #include "intel_screen.h"
  43 #include "intel_batchbuffer.h"
  44 #include "intel_buffers.h"
  45
  46 #include "i915_context.h"
  47 #include "i915_reg.h"
  48
  49 #define FILE_DEBUG_FLAG DEBUG_STATE
  50
  51 void
  52 i915_update_stencil(struct gl_context * ctx)
  53 {
  54    struct i915_context *i915 = I915_CONTEXT(ctx);
  55    GLuint front_ref, front_writemask, front_mask;
  56    GLenum front_func, front_fail, front_pass_z_fail, front_pass_z_pass;
  57    GLuint back_ref, back_writemask, back_mask;
  58    GLenum back_func, back_fail, back_pass_z_fail, back_pass_z_pass;
  59    GLuint dirty = 0;
  60
  61    /* The 915 considers CW to be "front" for two-sided stencil, so choose
  62     * appropriately.
  63     */
  64    /* _NEW_POLYGON | _NEW_STENCIL */
  65    if (ctx->Polygon.FrontFace == GL_CW) {
  66       front_ref = ctx->Stencil.Ref[0];
  67       front_mask = ctx->Stencil.ValueMask[0];
  68       front_writemask = ctx->Stencil.WriteMask[0];
  69       front_func = ctx->Stencil.Function[0];
  70       front_fail = ctx->Stencil.FailFunc[0];
  71       front_pass_z_fail = ctx->Stencil.ZFailFunc[0];
  72       front_pass_z_pass = ctx->Stencil.ZPassFunc[0];
  73       back_ref = ctx->Stencil.Ref[ctx->Stencil._BackFace];
  74       back_mask = ctx->Stencil.ValueMask[ctx->Stencil._BackFace];
  75       back_writemask = ctx->Stencil.WriteMask[ctx->Stencil._BackFace];
  76       back_func = ctx->Stencil.Function[ctx->Stencil._BackFace];
  77       back_fail = ctx->Stencil.FailFunc[ctx->Stencil._BackFace];
  78       back_pass_z_fail = ctx->Stencil.ZFailFunc[ctx->Stencil._BackFace];
  79       back_pass_z_pass = ctx->Stencil.ZPassFunc[ctx->Stencil._BackFace];
  80    } else {
  81       front_ref = ctx->Stencil.Ref[ctx->Stencil._BackFace];
  82       front_mask = ctx->Stencil.ValueMask[ctx->Stencil._BackFace];
  83       front_writemask = ctx->Stencil.WriteMask[ctx->Stencil._BackFace];
  84       front_func = ctx->Stencil.Function[ctx->Stencil._BackFace];
  85       front_fail = ctx->Stencil.FailFunc[ctx->Stencil._BackFace];
  86       front_pass_z_fail = ctx->Stencil.ZFailFunc[ctx->Stencil._BackFace];
  87       front_pass_z_pass = ctx->Stencil.ZPassFunc[ctx->Stencil._BackFace];
  88       back_ref = ctx->Stencil.Ref[0];
  89       back_mask = ctx->Stencil.ValueMask[0];
  90       back_writemask = ctx->Stencil.WriteMask[0];
  91       back_func = ctx->Stencil.Function[0];
  92       back_fail = ctx->Stencil.FailFunc[0];
  93       back_pass_z_fail = ctx->Stencil.ZFailFunc[0];
  94       back_pass_z_pass = ctx->Stencil.ZPassFunc[0];
  95    }
  96 #define set_ctx_bits(reg, mask, set) do{ \
  97    GLuint dw = i915->state.Ctx[reg]; \
  98    dw &= ~(mask); \
  99    dw |= (set); \
 100    dirty |= dw != i915->state.Ctx[reg]; \
 101    i915->state.Ctx[reg] = dw; \
 102 } while(0)
 103
 104    /* Set front state. */
 105    set_ctx_bits(I915_CTXREG_STATE4,
 106                 MODE4_ENABLE_STENCIL_TEST_MASK |
 107                 MODE4_ENABLE_STENCIL_WRITE_MASK,
 108                 ENABLE_STENCIL_TEST_MASK |
 109                 ENABLE_STENCIL_WRITE_MASK |
 110                 STENCIL_TEST_MASK(front_mask) |
 111                 STENCIL_WRITE_MASK(front_writemask));
 112
 113    set_ctx_bits(I915_CTXREG_LIS5,
 114                 S5_STENCIL_REF_MASK |
 115                 S5_STENCIL_TEST_FUNC_MASK |
 116                 S5_STENCIL_FAIL_MASK |
 117                 S5_STENCIL_PASS_Z_FAIL_MASK |
 118                 S5_STENCIL_PASS_Z_PASS_MASK,
 119                 (front_ref << S5_STENCIL_REF_SHIFT) |
 120                 (intel_translate_compare_func(front_func) << S5_STENCIL_TEST_FUNC_SHIFT) |
 121                 (intel_translate_stencil_op(front_fail) << S5_STENCIL_FAIL_SHIFT) |
 122                 (intel_translate_stencil_op(front_pass_z_fail) <<
 123                  S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 124                 (intel_translate_stencil_op(front_pass_z_pass) <<
 125                  S5_STENCIL_PASS_Z_PASS_SHIFT));
 126
 127    /* Set back state if different from front. */
 128    if (ctx->Stencil._TestTwoSide) {
 129       set_ctx_bits(I915_CTXREG_BF_STENCIL_OPS,
 130                    BFO_STENCIL_REF_MASK |
 131                    BFO_STENCIL_TEST_MASK |
 132                    BFO_STENCIL_FAIL_MASK |
 133                    BFO_STENCIL_PASS_Z_FAIL_MASK |
 134                    BFO_STENCIL_PASS_Z_PASS_MASK,
 135                    BFO_STENCIL_TWO_SIDE |
 136                    (back_ref << BFO_STENCIL_REF_SHIFT) |
 137                    (intel_translate_compare_func(back_func) << BFO_STENCIL_TEST_SHIFT) |
 138                    (intel_translate_stencil_op(back_fail) << BFO_STENCIL_FAIL_SHIFT) |
 139                    (intel_translate_stencil_op(back_pass_z_fail) <<
 140                     BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 141                    (intel_translate_stencil_op(back_pass_z_pass) <<
 142                     BFO_STENCIL_PASS_Z_PASS_SHIFT));
 143
 144       set_ctx_bits(I915_CTXREG_BF_STENCIL_MASKS,
 145                    BFM_STENCIL_TEST_MASK_MASK |
 146                    BFM_STENCIL_WRITE_MASK_MASK,
 147                    BFM_STENCIL_TEST_MASK(back_mask) |
 148                    BFM_STENCIL_WRITE_MASK(back_writemask));
 149    } else {
 150       set_ctx_bits(I915_CTXREG_BF_STENCIL_OPS,
 151                    BFO_STENCIL_TWO_SIDE, 0);
 152    }
 153
 154 #undef set_ctx_bits
 155
 156    if (dirty)
 157       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 158 }
 159
 160 static void
 161 i915StencilFuncSeparate(struct gl_context * ctx, GLenum face, GLenum func, GLint ref,
 162                         GLuint mask)
 163 {
 164 }
 165
 166 static void
 167 i915StencilMaskSeparate(struct gl_context * ctx, GLenum face, GLuint mask)
 168 {
 169 }
 170
 171 static void
 172 i915StencilOpSeparate(struct gl_context * ctx, GLenum face, GLenum fail, GLenum zfail,
 173                       GLenum zpass)
 174 {
 175 }
 176
 177 static void
 178 i915AlphaFunc(struct gl_context * ctx, GLenum func, GLfloat ref)
 179 {
 180    struct i915_context *i915 = I915_CONTEXT(ctx);
 181    int test = intel_translate_compare_func(func);
 182    GLubyte refByte;
 183    GLuint dw;
 184
 185    UNCLAMPED_FLOAT_TO_UBYTE(refByte, ref);
 186
 187    dw = i915->state.Ctx[I915_CTXREG_LIS6];
 188    dw &= ~(S6_ALPHA_TEST_FUNC_MASK | S6_ALPHA_REF_MASK);
 189    dw |= ((test << S6_ALPHA_TEST_FUNC_SHIFT) |
 190           (((GLuint) refByte) << S6_ALPHA_REF_SHIFT));
 191    if (dw != i915->state.Ctx[I915_CTXREG_LIS6]) {
 192       i915->state.Ctx[I915_CTXREG_LIS6] = dw;
 193       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 194    }
 195 }
 196
 197 /* This function makes sure that the proper enables are
 198  * set for LogicOp, Independant Alpha Blend, and Blending.
 199  * It needs to be called from numerous places where we
 200  * could change the LogicOp or Independant Alpha Blend without subsequent
 201  * calls to glEnable.
 202  */
 203 static void
 204 i915EvalLogicOpBlendState(struct gl_context * ctx)
 205 {
 206    struct i915_context *i915 = I915_CONTEXT(ctx);
 207    GLuint dw0, dw1;
 208
 209    dw0 = i915->state.Ctx[I915_CTXREG_LIS5];
 210    dw1 = i915->state.Ctx[I915_CTXREG_LIS6];
 211
 212    if (ctx->Color.ColorLogicOpEnabled) {
 213       dw0 |= S5_LOGICOP_ENABLE;
 214       dw1 &= ~S6_CBUF_BLEND_ENABLE;
 215    }
 216    else {
 217       dw0 &= ~S5_LOGICOP_ENABLE;
 218
 219       if (ctx->Color.BlendEnabled) {
 220          dw1 |= S6_CBUF_BLEND_ENABLE;
 221       }
 222       else {
 223          dw1 &= ~S6_CBUF_BLEND_ENABLE;
 224       }
 225    }
 226    if (dw0 != i915->state.Ctx[I915_CTXREG_LIS5] ||
 227        dw1 != i915->state.Ctx[I915_CTXREG_LIS6]) {
 228       i915->state.Ctx[I915_CTXREG_LIS5] = dw0;
 229       i915->state.Ctx[I915_CTXREG_LIS6] = dw1;
 230
 231       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 232    }
 233 }
 234
 235 static void
 236 i915BlendColor(struct gl_context * ctx, const GLfloat color[4])
 237 {
 238    struct i915_context *i915 = I915_CONTEXT(ctx);
 239    GLubyte r, g, b, a;
 240    GLuint dw;
 241
 242    DBG("%s\n", __FUNCTION__);
 243
 244    UNCLAMPED_FLOAT_TO_UBYTE(r, color[RCOMP]);
 245    UNCLAMPED_FLOAT_TO_UBYTE(g, color[GCOMP]);
 246    UNCLAMPED_FLOAT_TO_UBYTE(b, color[BCOMP]);
 247    UNCLAMPED_FLOAT_TO_UBYTE(a, color[ACOMP]);
 248
 249    dw = (a << 24) | (r << 16) | (g << 8) | b;
 250    if (dw != i915->state.Blend[I915_BLENDREG_BLENDCOLOR1]) {
 251       i915->state.Blend[I915_BLENDREG_BLENDCOLOR1] = dw;
 252       I915_STATECHANGE(i915, I915_UPLOAD_BLEND);
 253    }
 254 }
 255
 256
 257 #define DST_BLND_FACT(f) ((f)<<S6_CBUF_DST_BLEND_FACT_SHIFT)
 258 #define SRC_BLND_FACT(f) ((f)<<S6_CBUF_SRC_BLEND_FACT_SHIFT)
 259 #define DST_ABLND_FACT(f) ((f)<<IAB_DST_FACTOR_SHIFT)
 260 #define SRC_ABLND_FACT(f) ((f)<<IAB_SRC_FACTOR_SHIFT)
 261
 262
 263
 264 static GLuint
 265 translate_blend_equation(GLenum mode)
 266 {
 267    switch (mode) {
 268    case GL_FUNC_ADD:
 269       return BLENDFUNC_ADD;
 270    case GL_MIN:
 271       return BLENDFUNC_MIN;
 272    case GL_MAX:
 273       return BLENDFUNC_MAX;
 274    case GL_FUNC_SUBTRACT:
 275       return BLENDFUNC_SUBTRACT;
 276    case GL_FUNC_REVERSE_SUBTRACT:
 277       return BLENDFUNC_REVERSE_SUBTRACT;
 278    default:
 279       return 0;
 280    }
 281 }
 282
 283 static void
 284 i915UpdateBlendState(struct gl_context * ctx)
 285 {
 286    struct i915_context *i915 = I915_CONTEXT(ctx);
 287    GLuint iab = (i915->state.Blend[I915_BLENDREG_IAB] &
 288                  ~(IAB_SRC_FACTOR_MASK |
 289                    IAB_DST_FACTOR_MASK |
 290                    (BLENDFUNC_MASK << IAB_FUNC_SHIFT) | IAB_ENABLE));
 291
 292    GLuint lis6 = (i915->state.Ctx[I915_CTXREG_LIS6] &
 293                   ~(S6_CBUF_SRC_BLEND_FACT_MASK |
 294                     S6_CBUF_DST_BLEND_FACT_MASK | S6_CBUF_BLEND_FUNC_MASK));
 295
 296    GLuint eqRGB = ctx->Color.Blend[0].EquationRGB;
 297    GLuint eqA = ctx->Color.Blend[0].EquationA;
 298    GLuint srcRGB = ctx->Color.Blend[0].SrcRGB;
 299    GLuint dstRGB = ctx->Color.Blend[0].DstRGB;
 300    GLuint srcA = ctx->Color.Blend[0].SrcA;
 301    GLuint dstA = ctx->Color.Blend[0].DstA;
 302
 303    if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
 304       srcRGB = dstRGB = GL_ONE;
 305    }
 306
 307    if (eqA == GL_MIN || eqA == GL_MAX) {
 308       srcA = dstA = GL_ONE;
 309    }
 310
 311    lis6 |= SRC_BLND_FACT(intel_translate_blend_factor(srcRGB));
 312    lis6 |= DST_BLND_FACT(intel_translate_blend_factor(dstRGB));
 313    lis6 |= translate_blend_equation(eqRGB) << S6_CBUF_BLEND_FUNC_SHIFT;
 314
 315    iab |= SRC_ABLND_FACT(intel_translate_blend_factor(srcA));
 316    iab |= DST_ABLND_FACT(intel_translate_blend_factor(dstA));
 317    iab |= translate_blend_equation(eqA) << IAB_FUNC_SHIFT;
 318
 319    if (srcA != srcRGB || dstA != dstRGB || eqA != eqRGB)
 320       iab |= IAB_ENABLE;
 321
 322    if (iab != i915->state.Blend[I915_BLENDREG_IAB]) {
 323       i915->state.Blend[I915_BLENDREG_IAB] = iab;
 324       I915_STATECHANGE(i915, I915_UPLOAD_BLEND);
 325    }
 326    if (lis6 != i915->state.Ctx[I915_CTXREG_LIS6]) {
 327       i915->state.Ctx[I915_CTXREG_LIS6] = lis6;
 328       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 329    }
 330
 331    /* This will catch a logicop blend equation */
 332    i915EvalLogicOpBlendState(ctx);
 333 }
 334
 335
 336 static void
 337 i915BlendFuncSeparate(struct gl_context * ctx, GLenum srcRGB,
 338                       GLenum dstRGB, GLenum srcA, GLenum dstA)
 339 {
 340    i915UpdateBlendState(ctx);
 341 }
 342
 343
 344 static void
 345 i915BlendEquationSeparate(struct gl_context * ctx, GLenum eqRGB, GLenum eqA)
 346 {
 347    i915UpdateBlendState(ctx);
 348 }
 349
 350
 351 static void
 352 i915DepthFunc(struct gl_context * ctx, GLenum func)
 353 {
 354    struct i915_context *i915 = I915_CONTEXT(ctx);
 355    int test = intel_translate_compare_func(func);
 356    GLuint dw;
 357
 358    DBG("%s\n", __FUNCTION__);
 359
 360    dw = i915->state.Ctx[I915_CTXREG_LIS6];
 361    dw &= ~S6_DEPTH_TEST_FUNC_MASK;
 362    dw |= test << S6_DEPTH_TEST_FUNC_SHIFT;
 363    if (dw != i915->state.Ctx[I915_CTXREG_LIS6]) {
 364       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 365       i915->state.Ctx[I915_CTXREG_LIS6] = dw;
 366    }
 367 }
 368
 369 static void
 370 i915DepthMask(struct gl_context * ctx, GLboolean flag)
 371 {
 372    struct i915_context *i915 = I915_CONTEXT(ctx);
 373    GLuint dw;
 374
 375    DBG("%s flag (%d)\n", __FUNCTION__, flag);
 376
 377    if (!ctx->DrawBuffer || !ctx->DrawBuffer->Visual.depthBits)
 378       flag = false;
 379
 380    dw = i915->state.Ctx[I915_CTXREG_LIS6];
 381    if (flag && ctx->Depth.Test)
 382       dw |= S6_DEPTH_WRITE_ENABLE;
 383    else
 384       dw &= ~S6_DEPTH_WRITE_ENABLE;
 385    if (dw != i915->state.Ctx[I915_CTXREG_LIS6]) {
 386       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 387       i915->state.Ctx[I915_CTXREG_LIS6] = dw;
 388    }
 389 }
 390
 391
 392
 393 /**
 394  * Update the viewport transformation matrix.  Depends on:
 395  *  - viewport pos/size
 396  *  - depthrange
 397  *  - window pos/size or FBO size
 398  */
 399 void
 400 intelCalcViewport(struct gl_context * ctx)
 401 {
 402    struct intel_context *intel = intel_context(ctx);
 403
 404    if (_mesa_is_winsys_fbo(ctx->DrawBuffer)) {
 405       _math_matrix_viewport(&intel->ViewportMatrix,
 406                             ctx->Viewport.X,
 407                             ctx->DrawBuffer->Height - ctx->Viewport.Y,
 408                             ctx->Viewport.Width,
 409                             -ctx->Viewport.Height,
 410                             ctx->Viewport.Near,
 411                             ctx->Viewport.Far,
 412                             1.0);
 413    } else {
 414       _math_matrix_viewport(&intel->ViewportMatrix,
 415                             ctx->Viewport.X,
 416                             ctx->Viewport.Y,
 417                             ctx->Viewport.Width,
 418                             ctx->Viewport.Height,
 419                             ctx->Viewport.Near,
 420                             ctx->Viewport.Far,
 421                             1.0);
 422    }
 423 }
 424
 425
 426 /** Called from ctx->Driver.Viewport() */
 427 static void
 428 i915Viewport(struct gl_context * ctx,
 429               GLint x, GLint y, GLsizei width, GLsizei height)
 430 {
 431    intelCalcViewport(ctx);
 432 }
 433
 434
 435 /** Called from ctx->Driver.DepthRange() */
 436 static void
 437 i915DepthRange(struct gl_context * ctx, GLclampd nearval, GLclampd farval)
 438 {
 439    intelCalcViewport(ctx);
 440 }
 441
 442
 443 /* =============================================================
 444  * Polygon stipple
 445  *
 446  * The i915 supports a 4x4 stipple natively, GL wants 32x32.
 447  * Fortunately stipple is usually a repeating pattern.
 448  */
 449 static void
 450 i915PolygonStipple(struct gl_context * ctx, const GLubyte * mask)
 451 {
 452    struct i915_context *i915 = I915_CONTEXT(ctx);
 453    const GLubyte *m;
 454    GLubyte p[4];
 455    int i, j, k;
 456    int active = (ctx->Polygon.StippleFlag &&
 457                  i915->intel.reduced_primitive == GL_TRIANGLES);
 458    GLuint newMask;
 459
 460    if (active) {
 461       I915_STATECHANGE(i915, I915_UPLOAD_STIPPLE);
 462       i915->state.Stipple[I915_STPREG_ST1] &= ~ST1_ENABLE;
 463    }
 464
 465    /* Use the already unpacked stipple data from the context rather than the
 466     * uninterpreted mask passed in.
 467     */
 468    mask = (const GLubyte *)ctx->PolygonStipple;
 469    m = mask;
 470
 471    p[0] = mask[12] & 0xf;
 472    p[0] |= p[0] << 4;
 473    p[1] = mask[8] & 0xf;
 474    p[1] |= p[1] << 4;
 475    p[2] = mask[4] & 0xf;
 476    p[2] |= p[2] << 4;
 477    p[3] = mask[0] & 0xf;
 478    p[3] |= p[3] << 4;
 479
 480    for (k = 0; k < 8; k++)
 481       for (j = 3; j >= 0; j--)
 482          for (i = 0; i < 4; i++, m++)
 483             if (*m != p[j]) {
 484                i915->intel.hw_stipple = 0;
 485                return;
 486             }
 487
 488    newMask = (((p[0] & 0xf) << 0) |
 489               ((p[1] & 0xf) << 4) |
 490               ((p[2] & 0xf) << 8) | ((p[3] & 0xf) << 12));
 491
 492
 493    if (newMask == 0xffff || newMask == 0x0) {
 494       /* this is needed to make conform pass */
 495       i915->intel.hw_stipple = 0;
 496       return;
 497    }
 498
 499    i915->state.Stipple[I915_STPREG_ST1] &= ~0xffff;
 500    i915->state.Stipple[I915_STPREG_ST1] |= newMask;
 501    i915->intel.hw_stipple = 1;
 502
 503    if (active)
 504       i915->state.Stipple[I915_STPREG_ST1] |= ST1_ENABLE;
 505 }
 506
 507
 508 /* =============================================================
 509  * Hardware clipping
 510  */
 511 static void
 512 i915Scissor(struct gl_context * ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 513 {
 514    struct i915_context *i915 = I915_CONTEXT(ctx);
 515    int x1, y1, x2, y2;
 516
 517    if (!ctx->DrawBuffer)
 518       return;
 519
 520    DBG("%s %d,%d %dx%d\n", __FUNCTION__, x, y, w, h);
 521
 522    if (_mesa_is_winsys_fbo(ctx->DrawBuffer)) {
 523       x1 = x;
 524       y1 = ctx->DrawBuffer->Height - (y + h);
 525       x2 = x + w - 1;
 526       y2 = y1 + h - 1;
 527       DBG("%s %d..%d,%d..%d (inverted)\n", __FUNCTION__, x1, x2, y1, y2);
 528    }
 529    else {
 530       /* FBO - not inverted
 531        */
 532       x1 = x;
 533       y1 = y;
 534       x2 = x + w - 1;
 535       y2 = y + h - 1;
 536       DBG("%s %d..%d,%d..%d (not inverted)\n", __FUNCTION__, x1, x2, y1, y2);
 537    }
 538
 539    x1 = CLAMP(x1, 0, ctx->DrawBuffer->Width - 1);
 540    y1 = CLAMP(y1, 0, ctx->DrawBuffer->Height - 1);
 541    x2 = CLAMP(x2, 0, ctx->DrawBuffer->Width - 1);
 542    y2 = CLAMP(y2, 0, ctx->DrawBuffer->Height - 1);
 543
 544    DBG("%s %d..%d,%d..%d (clamped)\n", __FUNCTION__, x1, x2, y1, y2);
 545
 546    I915_STATECHANGE(i915, I915_UPLOAD_BUFFERS);
 547    i915->state.Buffer[I915_DESTREG_SR1] = (y1 << 16) | (x1 & 0xffff);
 548    i915->state.Buffer[I915_DESTREG_SR2] = (y2 << 16) | (x2 & 0xffff);
 549 }
 550
 551 static void
 552 i915LogicOp(struct gl_context * ctx, GLenum opcode)
 553 {
 554    struct i915_context *i915 = I915_CONTEXT(ctx);
 555    int tmp = intel_translate_logic_op(opcode);
 556
 557    DBG("%s\n", __FUNCTION__);
 558
 559    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 560    i915->state.Ctx[I915_CTXREG_STATE4] &= ~LOGICOP_MASK;
 561    i915->state.Ctx[I915_CTXREG_STATE4] |= LOGIC_OP_FUNC(tmp);
 562 }
 563
 564
 565
 566 static void
 567 i915CullFaceFrontFace(struct gl_context * ctx, GLenum unused)
 568 {
 569    struct i915_context *i915 = I915_CONTEXT(ctx);
 570    GLuint mode, dw;
 571
 572    DBG("%s %d\n", __FUNCTION__,
 573        ctx->DrawBuffer ? ctx->DrawBuffer->Name : 0);
 574
 575    if (!ctx->Polygon.CullFlag) {
 576       mode = S4_CULLMODE_NONE;
 577    }
 578    else if (ctx->Polygon.CullFaceMode != GL_FRONT_AND_BACK) {
 579       mode = S4_CULLMODE_CW;
 580
 581       if (ctx->DrawBuffer && _mesa_is_user_fbo(ctx->DrawBuffer))
 582          mode ^= (S4_CULLMODE_CW ^ S4_CULLMODE_CCW);
 583       if (ctx->Polygon.CullFaceMode == GL_FRONT)
 584          mode ^= (S4_CULLMODE_CW ^ S4_CULLMODE_CCW);
 585       if (ctx->Polygon.FrontFace != GL_CCW)
 586          mode ^= (S4_CULLMODE_CW ^ S4_CULLMODE_CCW);
 587    }
 588    else {
 589       mode = S4_CULLMODE_BOTH;
 590    }
 591
 592    dw = i915->state.Ctx[I915_CTXREG_LIS4];
 593    dw &= ~S4_CULLMODE_MASK;
 594    dw |= mode;
 595    if (dw != i915->state.Ctx[I915_CTXREG_LIS4]) {
 596       i915->state.Ctx[I915_CTXREG_LIS4] = dw;
 597       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 598    }
 599 }
 600
 601 static void
 602 i915LineWidth(struct gl_context * ctx, GLfloat widthf)
 603 {
 604    struct i915_context *i915 = I915_CONTEXT(ctx);
 605    int lis4 = i915->state.Ctx[I915_CTXREG_LIS4] & ~S4_LINE_WIDTH_MASK;
 606    int width;
 607
 608    DBG("%s\n", __FUNCTION__);
 609
 610    width = (int) (widthf * 2);
 611    width = CLAMP(width, 1, 0xf);
 612    lis4 |= width << S4_LINE_WIDTH_SHIFT;
 613
 614    if (lis4 != i915->state.Ctx[I915_CTXREG_LIS4]) {
 615       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 616       i915->state.Ctx[I915_CTXREG_LIS4] = lis4;
 617    }
 618 }
 619
 620 static void
 621 i915PointSize(struct gl_context * ctx, GLfloat size)
 622 {
 623    struct i915_context *i915 = I915_CONTEXT(ctx);
 624    int lis4 = i915->state.Ctx[I915_CTXREG_LIS4] & ~S4_POINT_WIDTH_MASK;
 625    GLint point_size = (int) round(size);
 626
 627    DBG("%s\n", __FUNCTION__);
 628
 629    point_size = CLAMP(point_size, 1, 255);
 630    lis4 |= point_size << S4_POINT_WIDTH_SHIFT;
 631
 632    if (lis4 != i915->state.Ctx[I915_CTXREG_LIS4]) {
 633       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 634       i915->state.Ctx[I915_CTXREG_LIS4] = lis4;
 635    }
 636 }
 637
 638
 639 static void
 640 i915PointParameterfv(struct gl_context * ctx, GLenum pname, const GLfloat *params)
 641 {
 642    struct i915_context *i915 = I915_CONTEXT(ctx);
 643
 644    switch (pname) {
 645    case GL_POINT_SPRITE_COORD_ORIGIN:
 646       /* This could be supported, but it would require modifying the fragment
 647        * program to invert the y component of the texture coordinate by
 648        * inserting a 'SUB tc.y, {1.0}.xxxx, tc' instruction.
 649        */
 650       FALLBACK(&i915->intel, I915_FALLBACK_POINT_SPRITE_COORD_ORIGIN,
 651                (params[0] != GL_UPPER_LEFT));
 652       break;
 653    }
 654 }
 655
 656 void
 657 i915_update_sprite_point_enable(struct gl_context *ctx)
 658 {
 659    struct intel_context *intel = intel_context(ctx);
 660    /* _NEW_PROGRAM */
 661    struct i915_fragment_program *p =
 662       (struct i915_fragment_program *) ctx->FragmentProgram._Current;
 663    const GLbitfield64 inputsRead = p->FragProg.Base.InputsRead;
 664    struct i915_context *i915 = i915_context(ctx);
 665    GLuint s4 = i915->state.Ctx[I915_CTXREG_LIS4] & ~S4_VFMT_MASK;
 666    int i;
 667    GLuint coord_replace_bits = 0x0;
 668    GLuint tex_coord_unit_bits = 0x0;
 669
 670    for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 671       /* _NEW_POINT */
 672       if (ctx->Point.CoordReplace[i] && ctx->Point.PointSprite)
 673          coord_replace_bits |= (1 << i);
 674       if (inputsRead & VARYING_BIT_TEX(i))
 675          tex_coord_unit_bits |= (1 << i);
 676    }
 677
 678    /*
 679     * Here we can't enable the SPRITE_POINT_ENABLE bit when the mis-match
 680     * of tex_coord_unit_bits and coord_replace_bits, or this will make all
 681     * the other non-point-sprite coords(like varying inputs, as we now use
 682     * tex coord to implement varying inputs) be replaced to value (0, 0)-(1, 1).
 683     *
 684     * Thus, do fallback when needed.
 685     */
 686    FALLBACK(intel, I915_FALLBACK_COORD_REPLACE,
 687             coord_replace_bits && coord_replace_bits != tex_coord_unit_bits);
 688
 689    s4 &= ~S4_SPRITE_POINT_ENABLE;
 690    s4 |= (coord_replace_bits && coord_replace_bits == tex_coord_unit_bits) ?
 691          S4_SPRITE_POINT_ENABLE : 0;
 692    if (s4 != i915->state.Ctx[I915_CTXREG_LIS4]) {
 693       i915->state.Ctx[I915_CTXREG_LIS4] = s4;
 694       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 695    }
 696 }
 697
 698
 699 /* =============================================================
 700  * Color masks
 701  */
 702
 703 static void
 704 i915ColorMask(struct gl_context * ctx,
 705               GLboolean r, GLboolean g, GLboolean b, GLboolean a)
 706 {
 707    struct i915_context *i915 = I915_CONTEXT(ctx);
 708    GLuint tmp = i915->state.Ctx[I915_CTXREG_LIS5] & ~S5_WRITEDISABLE_MASK;
 709
 710    DBG("%s r(%d) g(%d) b(%d) a(%d)\n", __FUNCTION__, r, g, b,
 711        a);
 712
 713    if (!r)
 714       tmp |= S5_WRITEDISABLE_RED;
 715    if (!g)
 716       tmp |= S5_WRITEDISABLE_GREEN;
 717    if (!b)
 718       tmp |= S5_WRITEDISABLE_BLUE;
 719    if (!a)
 720       tmp |= S5_WRITEDISABLE_ALPHA;
 721
 722    if (tmp != i915->state.Ctx[I915_CTXREG_LIS5]) {
 723       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 724       i915->state.Ctx[I915_CTXREG_LIS5] = tmp;
 725    }
 726 }
 727
 728 static void
 729 update_specular(struct gl_context * ctx)
 730 {
 731    /* A hack to trigger the rebuild of the fragment program.
 732     */
 733    intel_context(ctx)->NewGLState |= _NEW_TEXTURE;
 734 }
 735
 736 static void
 737 i915LightModelfv(struct gl_context * ctx, GLenum pname, const GLfloat * param)
 738 {
 739    DBG("%s\n", __FUNCTION__);
 740
 741    if (pname == GL_LIGHT_MODEL_COLOR_CONTROL) {
 742       update_specular(ctx);
 743    }
 744 }
 745
 746 static void
 747 i915ShadeModel(struct gl_context * ctx, GLenum mode)
 748 {
 749    struct i915_context *i915 = I915_CONTEXT(ctx);
 750    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 751
 752    if (mode == GL_SMOOTH) {
 753       i915->state.Ctx[I915_CTXREG_LIS4] &= ~(S4_FLATSHADE_ALPHA |
 754                                              S4_FLATSHADE_COLOR |
 755                                              S4_FLATSHADE_SPECULAR);
 756    }
 757    else {
 758       i915->state.Ctx[I915_CTXREG_LIS4] |= (S4_FLATSHADE_ALPHA |
 759                                             S4_FLATSHADE_COLOR |
 760                                             S4_FLATSHADE_SPECULAR);
 761    }
 762 }
 763
 764 /* =============================================================
 765  * Fog
 766  *
 767  * This empty function remains because _mesa_init_driver_state calls
 768  * dd_function_table::Fogfv unconditionally.  We have to have some function
 769  * there so that it doesn't try to call a NULL pointer.
 770  */
 771 static void
 772 i915Fogfv(struct gl_context * ctx, GLenum pname, const GLfloat * param)
 773 {
 774    (void) ctx;
 775    (void) pname;
 776    (void) param;
 777 }
 778
 779 /* =============================================================
 780  */
 781
 782 static void
 783 i915Enable(struct gl_context * ctx, GLenum cap, GLboolean state)
 784 {
 785    struct i915_context *i915 = I915_CONTEXT(ctx);
 786    GLuint dw;
 787
 788    switch (cap) {
 789    case GL_TEXTURE_2D:
 790    case GL_TEXTURE_EXTERNAL_OES:
 791       break;
 792
 793    case GL_LIGHTING:
 794    case GL_COLOR_SUM:
 795       update_specular(ctx);
 796       break;
 797
 798    case GL_ALPHA_TEST:
 799       dw = i915->state.Ctx[I915_CTXREG_LIS6];
 800       if (state)
 801          dw |= S6_ALPHA_TEST_ENABLE;
 802       else
 803          dw &= ~S6_ALPHA_TEST_ENABLE;
 804       if (dw != i915->state.Ctx[I915_CTXREG_LIS6]) {
 805          i915->state.Ctx[I915_CTXREG_LIS6] = dw;
 806          I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 807       }
 808       break;
 809
 810    case GL_BLEND:
 811       i915EvalLogicOpBlendState(ctx);
 812       break;
 813
 814    case GL_COLOR_LOGIC_OP:
 815       i915EvalLogicOpBlendState(ctx);
 816
 817       /* Logicop doesn't seem to work at 16bpp:
 818        */
 819       if (ctx->Visual.rgbBits == 16)
 820          FALLBACK(&i915->intel, I915_FALLBACK_LOGICOP, state);
 821       break;
 822
 823    case GL_FRAGMENT_PROGRAM_ARB:
 824       break;
 825
 826    case GL_DITHER:
 827       dw = i915->state.Ctx[I915_CTXREG_LIS5];
 828       if (state)
 829          dw |= S5_COLOR_DITHER_ENABLE;
 830       else
 831          dw &= ~S5_COLOR_DITHER_ENABLE;
 832       if (dw != i915->state.Ctx[I915_CTXREG_LIS5]) {
 833          i915->state.Ctx[I915_CTXREG_LIS5] = dw;
 834          I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 835       }
 836       break;
 837
 838    case GL_DEPTH_TEST:
 839       dw = i915->state.Ctx[I915_CTXREG_LIS6];
 840
 841       if (!ctx->DrawBuffer || !ctx->DrawBuffer->Visual.depthBits)
 842          state = false;
 843
 844       if (state)
 845          dw |= S6_DEPTH_TEST_ENABLE;
 846       else
 847          dw &= ~S6_DEPTH_TEST_ENABLE;
 848       if (dw != i915->state.Ctx[I915_CTXREG_LIS6]) {
 849          i915->state.Ctx[I915_CTXREG_LIS6] = dw;
 850          I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 851       }
 852
 853       i915DepthMask(ctx, ctx->Depth.Mask);
 854       break;
 855
 856    case GL_SCISSOR_TEST:
 857       I915_STATECHANGE(i915, I915_UPLOAD_BUFFERS);
 858       if (state)
 859          i915->state.Buffer[I915_DESTREG_SENABLE] =
 860             (_3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT);
 861       else
 862          i915->state.Buffer[I915_DESTREG_SENABLE] =
 863             (_3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT);
 864       break;
 865
 866    case GL_LINE_SMOOTH:
 867       dw = i915->state.Ctx[I915_CTXREG_LIS4];
 868       if (state)
 869          dw |= S4_LINE_ANTIALIAS_ENABLE;
 870       else
 871          dw &= ~S4_LINE_ANTIALIAS_ENABLE;
 872       if (dw != i915->state.Ctx[I915_CTXREG_LIS4]) {
 873          i915->state.Ctx[I915_CTXREG_LIS4] = dw;
 874          I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 875       }
 876       break;
 877
 878    case GL_CULL_FACE:
 879       i915CullFaceFrontFace(ctx, 0);
 880       break;
 881
 882    case GL_STENCIL_TEST:
 883       if (!ctx->DrawBuffer || !ctx->DrawBuffer->Visual.stencilBits)
 884          state = false;
 885
 886       dw = i915->state.Ctx[I915_CTXREG_LIS5];
 887       if (state)
 888          dw |= (S5_STENCIL_TEST_ENABLE | S5_STENCIL_WRITE_ENABLE);
 889       else
 890          dw &= ~(S5_STENCIL_TEST_ENABLE | S5_STENCIL_WRITE_ENABLE);
 891       if (dw != i915->state.Ctx[I915_CTXREG_LIS5]) {
 892          i915->state.Ctx[I915_CTXREG_LIS5] = dw;
 893          I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 894       }
 895       break;
 896
 897    case GL_POLYGON_STIPPLE:
 898       /* The stipple command worked on my 855GM box, but not my 845G.
 899        * I'll do more testing later to find out exactly which hardware
 900        * supports it.  Disabled for now.
 901        */
 902       if (i915->intel.hw_stipple &&
 903           i915->intel.reduced_primitive == GL_TRIANGLES) {
 904          I915_STATECHANGE(i915, I915_UPLOAD_STIPPLE);
 905          if (state)
 906             i915->state.Stipple[I915_STPREG_ST1] |= ST1_ENABLE;
 907          else
 908             i915->state.Stipple[I915_STPREG_ST1] &= ~ST1_ENABLE;
 909       }
 910       break;
 911
 912    case GL_POLYGON_SMOOTH:
 913       break;
 914
 915    case GL_POINT_SPRITE:
 916       /* Handle it at i915_update_sprite_point_enable () */
 917       break;
 918
 919    case GL_POINT_SMOOTH:
 920       break;
 921
 922    default:
 923       ;
 924    }
 925 }
 926
 927
 928 static void
 929 i915_init_packets(struct i915_context *i915)
 930 {
 931    /* Zero all state */
 932    memset(&i915->state, 0, sizeof(i915->state));
 933
 934
 935    {
 936       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 937       I915_STATECHANGE(i915, I915_UPLOAD_BLEND);
 938       /* Probably don't want to upload all this stuff every time one
 939        * piece changes.
 940        */
 941       i915->state.Ctx[I915_CTXREG_LI] = (_3DSTATE_LOAD_STATE_IMMEDIATE_1 |
 942                                          I1_LOAD_S(2) |
 943                                          I1_LOAD_S(4) |
 944                                          I1_LOAD_S(5) | I1_LOAD_S(6) | (3));
 945       i915->state.Ctx[I915_CTXREG_LIS2] = 0;
 946       i915->state.Ctx[I915_CTXREG_LIS4] = 0;
 947       i915->state.Ctx[I915_CTXREG_LIS5] = 0;
 948
 949       if (i915->intel.ctx.Visual.rgbBits == 16)
 950          i915->state.Ctx[I915_CTXREG_LIS5] |= S5_COLOR_DITHER_ENABLE;
 951
 952
 953       i915->state.Ctx[I915_CTXREG_LIS6] = (S6_COLOR_WRITE_ENABLE |
 954                                            (2 << S6_TRISTRIP_PV_SHIFT));
 955
 956       i915->state.Ctx[I915_CTXREG_STATE4] = (_3DSTATE_MODES_4_CMD |
 957                                              ENABLE_LOGIC_OP_FUNC |
 958                                              LOGIC_OP_FUNC(LOGICOP_COPY) |
 959                                              ENABLE_STENCIL_TEST_MASK |
 960                                              STENCIL_TEST_MASK(0xff) |
 961                                              ENABLE_STENCIL_WRITE_MASK |
 962                                              STENCIL_WRITE_MASK(0xff));
 963
 964       i915->state.Blend[I915_BLENDREG_IAB] =
 965          (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD | IAB_MODIFY_ENABLE |
 966           IAB_MODIFY_FUNC | IAB_MODIFY_SRC_FACTOR | IAB_MODIFY_DST_FACTOR);
 967
 968       i915->state.Blend[I915_BLENDREG_BLENDCOLOR0] =
 969          _3DSTATE_CONST_BLEND_COLOR_CMD;
 970       i915->state.Blend[I915_BLENDREG_BLENDCOLOR1] = 0;
 971
 972       i915->state.Ctx[I915_CTXREG_BF_STENCIL_MASKS] =
 973          _3DSTATE_BACKFACE_STENCIL_MASKS |
 974          BFM_ENABLE_STENCIL_TEST_MASK |
 975          BFM_ENABLE_STENCIL_WRITE_MASK |
 976          (0xff << BFM_STENCIL_WRITE_MASK_SHIFT) |
 977          (0xff << BFM_STENCIL_TEST_MASK_SHIFT);
 978       i915->state.Ctx[I915_CTXREG_BF_STENCIL_OPS] =
 979          _3DSTATE_BACKFACE_STENCIL_OPS |
 980          BFO_ENABLE_STENCIL_REF |
 981          BFO_ENABLE_STENCIL_FUNCS |
 982          BFO_ENABLE_STENCIL_TWO_SIDE;
 983    }
 984
 985    {
 986       I915_STATECHANGE(i915, I915_UPLOAD_STIPPLE);
 987       i915->state.Stipple[I915_STPREG_ST0] = _3DSTATE_STIPPLE;
 988    }
 989
 990    {
 991       i915->state.Buffer[I915_DESTREG_DV0] = _3DSTATE_DST_BUF_VARS_CMD;
 992
 993       /* scissor */
 994       i915->state.Buffer[I915_DESTREG_SENABLE] =
 995          (_3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT);
 996       i915->state.Buffer[I915_DESTREG_SR0] = _3DSTATE_SCISSOR_RECT_0_CMD;
 997       i915->state.Buffer[I915_DESTREG_SR1] = 0;
 998       i915->state.Buffer[I915_DESTREG_SR2] = 0;
 999    }
1000
1001    i915->state.RasterRules[I915_RASTER_RULES] = _3DSTATE_RASTER_RULES_CMD |
1002       ENABLE_POINT_RASTER_RULE |
1003       OGL_POINT_RASTER_RULE |
1004       ENABLE_LINE_STRIP_PROVOKE_VRTX |
1005       ENABLE_TRI_FAN_PROVOKE_VRTX |
1006       LINE_STRIP_PROVOKE_VRTX(1) |
1007       TRI_FAN_PROVOKE_VRTX(2) | ENABLE_TEXKILL_3D_4D | TEXKILL_4D;
1008
1009 #if 0
1010    {
1011       I915_STATECHANGE(i915, I915_UPLOAD_DEFAULTS);
1012       i915->state.Default[I915_DEFREG_C0] = _3DSTATE_DEFAULT_DIFFUSE;
1013       i915->state.Default[I915_DEFREG_C1] = 0;
1014       i915->state.Default[I915_DEFREG_S0] = _3DSTATE_DEFAULT_SPECULAR;
1015       i915->state.Default[I915_DEFREG_S1] = 0;
1016       i915->state.Default[I915_DEFREG_Z0] = _3DSTATE_DEFAULT_Z;
1017       i915->state.Default[I915_DEFREG_Z1] = 0;
1018    }
1019 #endif
1020
1021
1022    /* These will be emitted every at the head of every buffer, unless
1023     * we get hardware contexts working.
1024     */
1025    i915->state.active = (I915_UPLOAD_PROGRAM |
1026                          I915_UPLOAD_STIPPLE |
1027                          I915_UPLOAD_CTX |
1028                          I915_UPLOAD_BLEND |
1029                          I915_UPLOAD_BUFFERS |
1030                          I915_UPLOAD_INVARIENT |
1031                          I915_UPLOAD_RASTER_RULES);
1032 }
1033
1034 void
1035 i915_update_provoking_vertex(struct gl_context * ctx)
1036 {
1037    struct i915_context *i915 = I915_CONTEXT(ctx);
1038
1039    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
1040    i915->state.Ctx[I915_CTXREG_LIS6] &= ~(S6_TRISTRIP_PV_MASK);
1041
1042    I915_STATECHANGE(i915, I915_UPLOAD_RASTER_RULES);
1043    i915->state.RasterRules[I915_RASTER_RULES] &= ~(LINE_STRIP_PROVOKE_VRTX_MASK |
1044                                                    TRI_FAN_PROVOKE_VRTX_MASK);
1045
1046    /* _NEW_LIGHT */
1047    if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION) {
1048       i915->state.RasterRules[I915_RASTER_RULES] |= (LINE_STRIP_PROVOKE_VRTX(1) |
1049                                                      TRI_FAN_PROVOKE_VRTX(2));
1050       i915->state.Ctx[I915_CTXREG_LIS6] |= (2 << S6_TRISTRIP_PV_SHIFT);
1051    } else {
1052       i915->state.RasterRules[I915_RASTER_RULES] |= (LINE_STRIP_PROVOKE_VRTX(0) |
1053                                                      TRI_FAN_PROVOKE_VRTX(1));
1054       i915->state.Ctx[I915_CTXREG_LIS6] |= (0 << S6_TRISTRIP_PV_SHIFT);
1055     }
1056 }
1057
1058 /* Fallback to swrast for select and feedback.
1059  */
1060 static void
1061 i915RenderMode(struct gl_context *ctx, GLenum mode)
1062 {
1063    struct intel_context *intel = intel_context(ctx);
1064    FALLBACK(intel, INTEL_FALLBACK_RENDERMODE, (mode != GL_RENDER));
1065 }
1066
1067 void
1068 i915InitStateFunctions(struct dd_function_table *functions)
1069 {
1070    functions->AlphaFunc = i915AlphaFunc;
1071    functions->BlendColor = i915BlendColor;
1072    functions->BlendEquationSeparate = i915BlendEquationSeparate;
1073    functions->BlendFuncSeparate = i915BlendFuncSeparate;
1074    functions->ColorMask = i915ColorMask;
1075    functions->CullFace = i915CullFaceFrontFace;
1076    functions->DepthFunc = i915DepthFunc;
1077    functions->DepthMask = i915DepthMask;
1078    functions->Enable = i915Enable;
1079    functions->Fogfv = i915Fogfv;
1080    functions->FrontFace = i915CullFaceFrontFace;
1081    functions->LightModelfv = i915LightModelfv;
1082    functions->LineWidth = i915LineWidth;
1083    functions->LogicOpcode = i915LogicOp;
1084    functions->PointSize = i915PointSize;
1085    functions->PointParameterfv = i915PointParameterfv;
1086    functions->PolygonStipple = i915PolygonStipple;
1087    functions->RenderMode = i915RenderMode;
1088    functions->Scissor = i915Scissor;
1089    functions->ShadeModel = i915ShadeModel;
1090    functions->StencilFuncSeparate = i915StencilFuncSeparate;
1091    functions->StencilMaskSeparate = i915StencilMaskSeparate;
1092    functions->StencilOpSeparate = i915StencilOpSeparate;
1093    functions->DepthRange = i915DepthRange;
1094    functions->Viewport = i915Viewport;
1095 }
1096
1097
1098 void
1099 i915InitState(struct i915_context *i915)
1100 {
1101    struct gl_context *ctx = &i915->intel.ctx;
1102
1103    i915_init_packets(i915);
1104
1105    _mesa_init_driver_state(ctx);
1106 }