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/dd.h"
  34 #include "tnl/tnl.h"
  35 #include "tnl/t_context.h"
  36
  37 #include "texmem.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(GLcontext * 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
  60    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
  61
  62    /* The 915 considers CW to be "front" for two-sided stencil, so choose
  63     * appropriately.
  64     */
  65    /* _NEW_POLYGON | _NEW_STENCIL */
  66    if (ctx->Polygon.FrontFace == GL_CW) {
  67       front_ref = ctx->Stencil.Ref[0];
  68       front_mask = ctx->Stencil.ValueMask[0];
  69       front_writemask = ctx->Stencil.WriteMask[0];
  70       front_func = ctx->Stencil.Function[0];
  71       front_fail = ctx->Stencil.FailFunc[0];
  72       front_pass_z_fail = ctx->Stencil.ZFailFunc[0];
  73       front_pass_z_pass = ctx->Stencil.ZPassFunc[0];
  74       back_ref = ctx->Stencil.Ref[ctx->Stencil._BackFace];
  75       back_mask = ctx->Stencil.ValueMask[ctx->Stencil._BackFace];
  76       back_writemask = ctx->Stencil.WriteMask[ctx->Stencil._BackFace];
  77       back_func = ctx->Stencil.Function[ctx->Stencil._BackFace];
  78       back_fail = ctx->Stencil.FailFunc[ctx->Stencil._BackFace];
  79       back_pass_z_fail = ctx->Stencil.ZFailFunc[ctx->Stencil._BackFace];
  80       back_pass_z_pass = ctx->Stencil.ZPassFunc[ctx->Stencil._BackFace];
  81    } else {
  82       front_ref = ctx->Stencil.Ref[ctx->Stencil._BackFace];
  83       front_mask = ctx->Stencil.ValueMask[ctx->Stencil._BackFace];
  84       front_writemask = ctx->Stencil.WriteMask[ctx->Stencil._BackFace];
  85       front_func = ctx->Stencil.Function[ctx->Stencil._BackFace];
  86       front_fail = ctx->Stencil.FailFunc[ctx->Stencil._BackFace];
  87       front_pass_z_fail = ctx->Stencil.ZFailFunc[ctx->Stencil._BackFace];
  88       front_pass_z_pass = ctx->Stencil.ZPassFunc[ctx->Stencil._BackFace];
  89       back_ref = ctx->Stencil.Ref[0];
  90       back_mask = ctx->Stencil.ValueMask[0];
  91       back_writemask = ctx->Stencil.WriteMask[0];
  92       back_func = ctx->Stencil.Function[0];
  93       back_fail = ctx->Stencil.FailFunc[0];
  94       back_pass_z_fail = ctx->Stencil.ZFailFunc[0];
  95       back_pass_z_pass = ctx->Stencil.ZPassFunc[0];
  96    }
  97
  98    /* Set front state. */
  99    i915->state.Ctx[I915_CTXREG_STATE4] &= ~(MODE4_ENABLE_STENCIL_TEST_MASK |
 100                                             MODE4_ENABLE_STENCIL_WRITE_MASK);
 101    i915->state.Ctx[I915_CTXREG_STATE4] |= (ENABLE_STENCIL_TEST_MASK |
 102                                            ENABLE_STENCIL_WRITE_MASK |
 103                                            STENCIL_TEST_MASK(front_mask) |
 104                                            STENCIL_WRITE_MASK(front_writemask));
 105
 106    i915->state.Ctx[I915_CTXREG_LIS5] &= ~(S5_STENCIL_REF_MASK |
 107                                           S5_STENCIL_TEST_FUNC_MASK |
 108                                           S5_STENCIL_FAIL_MASK |
 109                                           S5_STENCIL_PASS_Z_FAIL_MASK |
 110                                           S5_STENCIL_PASS_Z_PASS_MASK);
 111
 112    i915->state.Ctx[I915_CTXREG_LIS5] |=
 113       (front_ref << S5_STENCIL_REF_SHIFT) |
 114       (intel_translate_compare_func(front_func) << S5_STENCIL_TEST_FUNC_SHIFT) |
 115       (intel_translate_stencil_op(front_fail) << S5_STENCIL_FAIL_SHIFT) |
 116       (intel_translate_stencil_op(front_pass_z_fail) <<
 117        S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 118       (intel_translate_stencil_op(front_pass_z_pass) <<
 119        S5_STENCIL_PASS_Z_PASS_SHIFT);
 120
 121    /* Set back state if different from front. */
 122    if (ctx->Stencil._TestTwoSide) {
 123       i915->state.Ctx[I915_CTXREG_BF_STENCIL_OPS] &=
 124          ~(BFO_STENCIL_REF_MASK |
 125            BFO_STENCIL_TEST_MASK |
 126            BFO_STENCIL_FAIL_MASK |
 127            BFO_STENCIL_PASS_Z_FAIL_MASK |
 128            BFO_STENCIL_PASS_Z_PASS_MASK);
 129       i915->state.Ctx[I915_CTXREG_BF_STENCIL_OPS] |= BFO_STENCIL_TWO_SIDE |
 130          (back_ref << BFO_STENCIL_REF_SHIFT) |
 131          (intel_translate_compare_func(back_func) << BFO_STENCIL_TEST_SHIFT) |
 132          (intel_translate_stencil_op(back_fail) << BFO_STENCIL_FAIL_SHIFT) |
 133          (intel_translate_stencil_op(back_pass_z_fail) <<
 134           BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 135          (intel_translate_stencil_op(back_pass_z_pass) <<
 136           BFO_STENCIL_PASS_Z_PASS_SHIFT);
 137
 138       i915->state.Ctx[I915_CTXREG_BF_STENCIL_MASKS] &=
 139          ~(BFM_STENCIL_TEST_MASK_MASK |
 140            BFM_STENCIL_WRITE_MASK_MASK);
 141       i915->state.Ctx[I915_CTXREG_BF_STENCIL_MASKS] |=
 142          BFM_STENCIL_TEST_MASK(back_mask) |
 143          BFM_STENCIL_WRITE_MASK(back_writemask);
 144    } else {
 145       i915->state.Ctx[I915_CTXREG_BF_STENCIL_OPS] &= ~BFO_STENCIL_TWO_SIDE;
 146    }
 147 }
 148
 149 static void
 150 i915StencilFuncSeparate(GLcontext * ctx, GLenum face, GLenum func, GLint ref,
 151                         GLuint mask)
 152 {
 153 }
 154
 155 static void
 156 i915StencilMaskSeparate(GLcontext * ctx, GLenum face, GLuint mask)
 157 {
 158 }
 159
 160 static void
 161 i915StencilOpSeparate(GLcontext * ctx, GLenum face, GLenum fail, GLenum zfail,
 162                       GLenum zpass)
 163 {
 164 }
 165
 166 static void
 167 i915AlphaFunc(GLcontext * ctx, GLenum func, GLfloat ref)
 168 {
 169    struct i915_context *i915 = I915_CONTEXT(ctx);
 170    int test = intel_translate_compare_func(func);
 171    GLubyte refByte;
 172
 173    UNCLAMPED_FLOAT_TO_UBYTE(refByte, ref);
 174
 175    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 176    i915->state.Ctx[I915_CTXREG_LIS6] &= ~(S6_ALPHA_TEST_FUNC_MASK |
 177                                           S6_ALPHA_REF_MASK);
 178    i915->state.Ctx[I915_CTXREG_LIS6] |= ((test << S6_ALPHA_TEST_FUNC_SHIFT) |
 179                                          (((GLuint) refByte) <<
 180                                           S6_ALPHA_REF_SHIFT));
 181 }
 182
 183 /* This function makes sure that the proper enables are
 184  * set for LogicOp, Independant Alpha Blend, and Blending.
 185  * It needs to be called from numerous places where we
 186  * could change the LogicOp or Independant Alpha Blend without subsequent
 187  * calls to glEnable.
 188  */
 189 static void
 190 i915EvalLogicOpBlendState(GLcontext * ctx)
 191 {
 192    struct i915_context *i915 = I915_CONTEXT(ctx);
 193
 194    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 195
 196    if (RGBA_LOGICOP_ENABLED(ctx)) {
 197       i915->state.Ctx[I915_CTXREG_LIS5] |= S5_LOGICOP_ENABLE;
 198       i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_CBUF_BLEND_ENABLE;
 199    }
 200    else {
 201       i915->state.Ctx[I915_CTXREG_LIS5] &= ~S5_LOGICOP_ENABLE;
 202
 203       if (ctx->Color.BlendEnabled) {
 204          i915->state.Ctx[I915_CTXREG_LIS6] |= S6_CBUF_BLEND_ENABLE;
 205       }
 206       else {
 207          i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_CBUF_BLEND_ENABLE;
 208       }
 209    }
 210 }
 211
 212 static void
 213 i915BlendColor(GLcontext * ctx, const GLfloat color[4])
 214 {
 215    struct i915_context *i915 = I915_CONTEXT(ctx);
 216    GLubyte r, g, b, a;
 217
 218    DBG("%s\n", __FUNCTION__);
 219
 220    UNCLAMPED_FLOAT_TO_UBYTE(r, color[RCOMP]);
 221    UNCLAMPED_FLOAT_TO_UBYTE(g, color[GCOMP]);
 222    UNCLAMPED_FLOAT_TO_UBYTE(b, color[BCOMP]);
 223    UNCLAMPED_FLOAT_TO_UBYTE(a, color[ACOMP]);
 224
 225    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 226    i915->state.Ctx[I915_CTXREG_BLENDCOLOR1] =
 227       (a << 24) | (r << 16) | (g << 8) | b;
 228 }
 229
 230
 231 #define DST_BLND_FACT(f) ((f)<<S6_CBUF_DST_BLEND_FACT_SHIFT)
 232 #define SRC_BLND_FACT(f) ((f)<<S6_CBUF_SRC_BLEND_FACT_SHIFT)
 233 #define DST_ABLND_FACT(f) ((f)<<IAB_DST_FACTOR_SHIFT)
 234 #define SRC_ABLND_FACT(f) ((f)<<IAB_SRC_FACTOR_SHIFT)
 235
 236
 237
 238 static GLuint
 239 translate_blend_equation(GLenum mode)
 240 {
 241    switch (mode) {
 242    case GL_FUNC_ADD:
 243       return BLENDFUNC_ADD;
 244    case GL_MIN:
 245       return BLENDFUNC_MIN;
 246    case GL_MAX:
 247       return BLENDFUNC_MAX;
 248    case GL_FUNC_SUBTRACT:
 249       return BLENDFUNC_SUBTRACT;
 250    case GL_FUNC_REVERSE_SUBTRACT:
 251       return BLENDFUNC_REVERSE_SUBTRACT;
 252    default:
 253       return 0;
 254    }
 255 }
 256
 257 static void
 258 i915UpdateBlendState(GLcontext * ctx)
 259 {
 260    struct i915_context *i915 = I915_CONTEXT(ctx);
 261    GLuint iab = (i915->state.Ctx[I915_CTXREG_IAB] &
 262                  ~(IAB_SRC_FACTOR_MASK |
 263                    IAB_DST_FACTOR_MASK |
 264                    (BLENDFUNC_MASK << IAB_FUNC_SHIFT) | IAB_ENABLE));
 265
 266    GLuint lis6 = (i915->state.Ctx[I915_CTXREG_LIS6] &
 267                   ~(S6_CBUF_SRC_BLEND_FACT_MASK |
 268                     S6_CBUF_DST_BLEND_FACT_MASK | S6_CBUF_BLEND_FUNC_MASK));
 269
 270    GLuint eqRGB = ctx->Color.BlendEquationRGB;
 271    GLuint eqA = ctx->Color.BlendEquationA;
 272    GLuint srcRGB = ctx->Color.BlendSrcRGB;
 273    GLuint dstRGB = ctx->Color.BlendDstRGB;
 274    GLuint srcA = ctx->Color.BlendSrcA;
 275    GLuint dstA = ctx->Color.BlendDstA;
 276
 277    if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
 278       srcRGB = dstRGB = GL_ONE;
 279    }
 280
 281    if (eqA == GL_MIN || eqA == GL_MAX) {
 282       srcA = dstA = GL_ONE;
 283    }
 284
 285    lis6 |= SRC_BLND_FACT(intel_translate_blend_factor(srcRGB));
 286    lis6 |= DST_BLND_FACT(intel_translate_blend_factor(dstRGB));
 287    lis6 |= translate_blend_equation(eqRGB) << S6_CBUF_BLEND_FUNC_SHIFT;
 288
 289    iab |= SRC_ABLND_FACT(intel_translate_blend_factor(srcA));
 290    iab |= DST_ABLND_FACT(intel_translate_blend_factor(dstA));
 291    iab |= translate_blend_equation(eqA) << IAB_FUNC_SHIFT;
 292
 293    if (srcA != srcRGB || dstA != dstRGB || eqA != eqRGB)
 294       iab |= IAB_ENABLE;
 295
 296    if (iab != i915->state.Ctx[I915_CTXREG_IAB] ||
 297        lis6 != i915->state.Ctx[I915_CTXREG_LIS6]) {
 298       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 299       i915->state.Ctx[I915_CTXREG_IAB] = iab;
 300       i915->state.Ctx[I915_CTXREG_LIS6] = lis6;
 301    }
 302
 303    /* This will catch a logicop blend equation */
 304    i915EvalLogicOpBlendState(ctx);
 305 }
 306
 307
 308 static void
 309 i915BlendFuncSeparate(GLcontext * ctx, GLenum srcRGB,
 310                       GLenum dstRGB, GLenum srcA, GLenum dstA)
 311 {
 312    i915UpdateBlendState(ctx);
 313 }
 314
 315
 316 static void
 317 i915BlendEquationSeparate(GLcontext * ctx, GLenum eqRGB, GLenum eqA)
 318 {
 319    i915UpdateBlendState(ctx);
 320 }
 321
 322
 323 static void
 324 i915DepthFunc(GLcontext * ctx, GLenum func)
 325 {
 326    struct i915_context *i915 = I915_CONTEXT(ctx);
 327    int test = intel_translate_compare_func(func);
 328
 329    DBG("%s\n", __FUNCTION__);
 330
 331    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 332    i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_DEPTH_TEST_FUNC_MASK;
 333    i915->state.Ctx[I915_CTXREG_LIS6] |= test << S6_DEPTH_TEST_FUNC_SHIFT;
 334 }
 335
 336 static void
 337 i915DepthMask(GLcontext * ctx, GLboolean flag)
 338 {
 339    struct i915_context *i915 = I915_CONTEXT(ctx);
 340
 341    DBG("%s flag (%d)\n", __FUNCTION__, flag);
 342
 343    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 344
 345    if (flag && ctx->Depth.Test)
 346       i915->state.Ctx[I915_CTXREG_LIS6] |= S6_DEPTH_WRITE_ENABLE;
 347    else
 348       i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_DEPTH_WRITE_ENABLE;
 349 }
 350
 351
 352
 353 /**
 354  * Update the viewport transformation matrix.  Depends on:
 355  *  - viewport pos/size
 356  *  - depthrange
 357  *  - window pos/size or FBO size
 358  */
 359 void
 360 intelCalcViewport(GLcontext * ctx)
 361 {
 362    struct intel_context *intel = intel_context(ctx);
 363    const GLfloat *v = ctx->Viewport._WindowMap.m;
 364    const GLfloat depthScale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
 365    GLfloat *m = intel->ViewportMatrix.m;
 366    GLfloat yScale, yBias;
 367
 368    if (ctx->DrawBuffer->Name) {
 369       /* User created FBO */
 370       /* y=0=bottom */
 371       yScale = 1.0;
 372       yBias = 0.0;
 373    }
 374    else {
 375       /* window buffer, y=0=top */
 376       yScale = -1.0;
 377       yBias = (intel->driDrawable) ? intel->driDrawable->h : 0.0F;
 378    }
 379
 380    m[MAT_SX] = v[MAT_SX];
 381    m[MAT_TX] = v[MAT_TX];
 382
 383    m[MAT_SY] = v[MAT_SY] * yScale;
 384    m[MAT_TY] = v[MAT_TY] * yScale + yBias;
 385
 386    m[MAT_SZ] = v[MAT_SZ] * depthScale;
 387    m[MAT_TZ] = v[MAT_TZ] * depthScale;
 388 }
 389
 390
 391 /** Called from ctx->Driver.Viewport() */
 392 static void
 393 i915Viewport(GLcontext * ctx,
 394               GLint x, GLint y, GLsizei width, GLsizei height)
 395 {
 396    intelCalcViewport(ctx);
 397
 398    intel_viewport(ctx, x, y, width, height);
 399 }
 400
 401
 402 /** Called from ctx->Driver.DepthRange() */
 403 static void
 404 i915DepthRange(GLcontext * ctx, GLclampd nearval, GLclampd farval)
 405 {
 406    intelCalcViewport(ctx);
 407 }
 408
 409
 410 /* =============================================================
 411  * Polygon stipple
 412  *
 413  * The i915 supports a 4x4 stipple natively, GL wants 32x32.
 414  * Fortunately stipple is usually a repeating pattern.
 415  */
 416 static void
 417 i915PolygonStipple(GLcontext * ctx, const GLubyte * mask)
 418 {
 419    struct i915_context *i915 = I915_CONTEXT(ctx);
 420    const GLubyte *m;
 421    GLubyte p[4];
 422    int i, j, k;
 423    int active = (ctx->Polygon.StippleFlag &&
 424                  i915->intel.reduced_primitive == GL_TRIANGLES);
 425    GLuint newMask;
 426
 427    if (active) {
 428       I915_STATECHANGE(i915, I915_UPLOAD_STIPPLE);
 429       i915->state.Stipple[I915_STPREG_ST1] &= ~ST1_ENABLE;
 430    }
 431
 432    /* Use the already unpacked stipple data from the context rather than the
 433     * uninterpreted mask passed in.
 434     */
 435    mask = (const GLubyte *)ctx->PolygonStipple;
 436    m = mask;
 437
 438    p[0] = mask[12] & 0xf;
 439    p[0] |= p[0] << 4;
 440    p[1] = mask[8] & 0xf;
 441    p[1] |= p[1] << 4;
 442    p[2] = mask[4] & 0xf;
 443    p[2] |= p[2] << 4;
 444    p[3] = mask[0] & 0xf;
 445    p[3] |= p[3] << 4;
 446
 447    for (k = 0; k < 8; k++)
 448       for (j = 3; j >= 0; j--)
 449          for (i = 0; i < 4; i++, m++)
 450             if (*m != p[j]) {
 451                i915->intel.hw_stipple = 0;
 452                return;
 453             }
 454
 455    newMask = (((p[0] & 0xf) << 0) |
 456               ((p[1] & 0xf) << 4) |
 457               ((p[2] & 0xf) << 8) | ((p[3] & 0xf) << 12));
 458
 459
 460    if (newMask == 0xffff || newMask == 0x0) {
 461       /* this is needed to make conform pass */
 462       i915->intel.hw_stipple = 0;
 463       return;
 464    }
 465
 466    i915->state.Stipple[I915_STPREG_ST1] &= ~0xffff;
 467    i915->state.Stipple[I915_STPREG_ST1] |= newMask;
 468    i915->intel.hw_stipple = 1;
 469
 470    if (active)
 471       i915->state.Stipple[I915_STPREG_ST1] |= ST1_ENABLE;
 472 }
 473
 474
 475 /* =============================================================
 476  * Hardware clipping
 477  */
 478 static void
 479 i915Scissor(GLcontext * ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 480 {
 481    struct i915_context *i915 = I915_CONTEXT(ctx);
 482    int x1, y1, x2, y2;
 483
 484    if (!ctx->DrawBuffer)
 485       return;
 486
 487    DBG("%s %d,%d %dx%d\n", __FUNCTION__, x, y, w, h);
 488
 489    if (ctx->DrawBuffer->Name == 0) {
 490       x1 = x;
 491       y1 = ctx->DrawBuffer->Height - (y + h);
 492       x2 = x + w - 1;
 493       y2 = y1 + h - 1;
 494       DBG("%s %d..%d,%d..%d (inverted)\n", __FUNCTION__, x1, x2, y1, y2);
 495    }
 496    else {
 497       /* FBO - not inverted
 498        */
 499       x1 = x;
 500       y1 = y;
 501       x2 = x + w - 1;
 502       y2 = y + h - 1;
 503       DBG("%s %d..%d,%d..%d (not inverted)\n", __FUNCTION__, x1, x2, y1, y2);
 504    }
 505
 506    x1 = CLAMP(x1, 0, ctx->DrawBuffer->Width - 1);
 507    y1 = CLAMP(y1, 0, ctx->DrawBuffer->Height - 1);
 508    x2 = CLAMP(x2, 0, ctx->DrawBuffer->Width - 1);
 509    y2 = CLAMP(y2, 0, ctx->DrawBuffer->Height - 1);
 510
 511    DBG("%s %d..%d,%d..%d (clamped)\n", __FUNCTION__, x1, x2, y1, y2);
 512
 513    I915_STATECHANGE(i915, I915_UPLOAD_BUFFERS);
 514    i915->state.Buffer[I915_DESTREG_SR1] = (y1 << 16) | (x1 & 0xffff);
 515    i915->state.Buffer[I915_DESTREG_SR2] = (y2 << 16) | (x2 & 0xffff);
 516 }
 517
 518 static void
 519 i915LogicOp(GLcontext * ctx, GLenum opcode)
 520 {
 521    struct i915_context *i915 = I915_CONTEXT(ctx);
 522    int tmp = intel_translate_logic_op(opcode);
 523
 524    DBG("%s\n", __FUNCTION__);
 525
 526    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 527    i915->state.Ctx[I915_CTXREG_STATE4] &= ~LOGICOP_MASK;
 528    i915->state.Ctx[I915_CTXREG_STATE4] |= LOGIC_OP_FUNC(tmp);
 529 }
 530
 531
 532
 533 static void
 534 i915CullFaceFrontFace(GLcontext * ctx, GLenum unused)
 535 {
 536    struct i915_context *i915 = I915_CONTEXT(ctx);
 537    GLuint mode;
 538
 539    DBG("%s %d\n", __FUNCTION__,
 540        ctx->DrawBuffer ? ctx->DrawBuffer->Name : 0);
 541
 542    if (!ctx->Polygon.CullFlag) {
 543       mode = S4_CULLMODE_NONE;
 544    }
 545    else if (ctx->Polygon.CullFaceMode != GL_FRONT_AND_BACK) {
 546       mode = S4_CULLMODE_CW;
 547
 548       if (ctx->DrawBuffer && ctx->DrawBuffer->Name != 0)
 549          mode ^= (S4_CULLMODE_CW ^ S4_CULLMODE_CCW);
 550       if (ctx->Polygon.CullFaceMode == GL_FRONT)
 551          mode ^= (S4_CULLMODE_CW ^ S4_CULLMODE_CCW);
 552       if (ctx->Polygon.FrontFace != GL_CCW)
 553          mode ^= (S4_CULLMODE_CW ^ S4_CULLMODE_CCW);
 554    }
 555    else {
 556       mode = S4_CULLMODE_BOTH;
 557    }
 558
 559    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 560    i915->state.Ctx[I915_CTXREG_LIS4] &= ~S4_CULLMODE_MASK;
 561    i915->state.Ctx[I915_CTXREG_LIS4] |= mode;
 562 }
 563
 564 static void
 565 i915LineWidth(GLcontext * ctx, GLfloat widthf)
 566 {
 567    struct i915_context *i915 = I915_CONTEXT(ctx);
 568    int lis4 = i915->state.Ctx[I915_CTXREG_LIS4] & ~S4_LINE_WIDTH_MASK;
 569    int width;
 570
 571    DBG("%s\n", __FUNCTION__);
 572
 573    width = (int) (widthf * 2);
 574    CLAMP_SELF(width, 1, 0xf);
 575    lis4 |= width << S4_LINE_WIDTH_SHIFT;
 576
 577    if (lis4 != i915->state.Ctx[I915_CTXREG_LIS4]) {
 578       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 579       i915->state.Ctx[I915_CTXREG_LIS4] = lis4;
 580    }
 581 }
 582
 583 static void
 584 i915PointSize(GLcontext * ctx, GLfloat size)
 585 {
 586    struct i915_context *i915 = I915_CONTEXT(ctx);
 587    int lis4 = i915->state.Ctx[I915_CTXREG_LIS4] & ~S4_POINT_WIDTH_MASK;
 588    GLint point_size = (int) size;
 589
 590    DBG("%s\n", __FUNCTION__);
 591
 592    CLAMP_SELF(point_size, 1, 255);
 593    lis4 |= point_size << S4_POINT_WIDTH_SHIFT;
 594
 595    if (lis4 != i915->state.Ctx[I915_CTXREG_LIS4]) {
 596       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 597       i915->state.Ctx[I915_CTXREG_LIS4] = lis4;
 598    }
 599 }
 600
 601
 602 /* =============================================================
 603  * Color masks
 604  */
 605
 606 static void
 607 i915ColorMask(GLcontext * ctx,
 608               GLboolean r, GLboolean g, GLboolean b, GLboolean a)
 609 {
 610    struct i915_context *i915 = I915_CONTEXT(ctx);
 611    GLuint tmp = i915->state.Ctx[I915_CTXREG_LIS5] & ~S5_WRITEDISABLE_MASK;
 612
 613    DBG("%s r(%d) g(%d) b(%d) a(%d)\n", __FUNCTION__, r, g, b,
 614        a);
 615
 616    if (!r)
 617       tmp |= S5_WRITEDISABLE_RED;
 618    if (!g)
 619       tmp |= S5_WRITEDISABLE_GREEN;
 620    if (!b)
 621       tmp |= S5_WRITEDISABLE_BLUE;
 622    if (!a)
 623       tmp |= S5_WRITEDISABLE_ALPHA;
 624
 625    if (tmp != i915->state.Ctx[I915_CTXREG_LIS5]) {
 626       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 627       i915->state.Ctx[I915_CTXREG_LIS5] = tmp;
 628    }
 629 }
 630
 631 static void
 632 update_specular(GLcontext * ctx)
 633 {
 634    /* A hack to trigger the rebuild of the fragment program.
 635     */
 636    intel_context(ctx)->NewGLState |= _NEW_TEXTURE;
 637 }
 638
 639 static void
 640 i915LightModelfv(GLcontext * ctx, GLenum pname, const GLfloat * param)
 641 {
 642    DBG("%s\n", __FUNCTION__);
 643
 644    if (pname == GL_LIGHT_MODEL_COLOR_CONTROL) {
 645       update_specular(ctx);
 646    }
 647 }
 648
 649 static void
 650 i915ShadeModel(GLcontext * ctx, GLenum mode)
 651 {
 652    struct i915_context *i915 = I915_CONTEXT(ctx);
 653    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 654
 655    if (mode == GL_SMOOTH) {
 656       i915->state.Ctx[I915_CTXREG_LIS4] &= ~(S4_FLATSHADE_ALPHA |
 657                                              S4_FLATSHADE_COLOR |
 658                                              S4_FLATSHADE_SPECULAR);
 659    }
 660    else {
 661       i915->state.Ctx[I915_CTXREG_LIS4] |= (S4_FLATSHADE_ALPHA |
 662                                             S4_FLATSHADE_COLOR |
 663                                             S4_FLATSHADE_SPECULAR);
 664    }
 665 }
 666
 667 /* =============================================================
 668  * Fog
 669  */
 670 void
 671 i915_update_fog(GLcontext * ctx)
 672 {
 673    struct i915_context *i915 = I915_CONTEXT(ctx);
 674    GLenum mode;
 675    GLboolean enabled;
 676    GLboolean try_pixel_fog;
 677
 678    if (ctx->FragmentProgram._Current) {
 679       /* Pull in static fog state from program */
 680       mode = ctx->FragmentProgram._Current->FogOption;
 681       enabled = (mode != GL_NONE);
 682       try_pixel_fog = 0;
 683    }
 684    else {
 685       enabled = ctx->Fog.Enabled;
 686       mode = ctx->Fog.Mode;
 687 #if 0
 688       /* XXX - DISABLED -- Need ortho fallback */
 689       try_pixel_fog = (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT
 690                        && ctx->Hint.Fog == GL_NICEST);
 691 #else
 692       try_pixel_fog = 0;
 693 #endif
 694    }
 695
 696    if (!enabled) {
 697       i915->vertex_fog = I915_FOG_NONE;
 698    }
 699    else if (try_pixel_fog) {
 700       I915_STATECHANGE(i915, I915_UPLOAD_FOG);
 701       i915->state.Fog[I915_FOGREG_MODE1] &= ~FMC1_FOGFUNC_MASK;
 702       i915->vertex_fog = I915_FOG_PIXEL;
 703
 704       switch (mode) {
 705       case GL_LINEAR:
 706          if (ctx->Fog.End <= ctx->Fog.Start) {
 707             /* XXX - this won't work with fragment programs.  Need to
 708              * either fallback or append fog instructions to end of
 709              * program in the case of linear fog.
 710              */
 711             printf("vertex fog!\n");
 712             i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_VERTEX;
 713             i915->vertex_fog = I915_FOG_VERTEX;
 714          }
 715          else {
 716             GLfloat c2 = 1.0 / (ctx->Fog.End - ctx->Fog.Start);
 717             GLfloat c1 = ctx->Fog.End * c2;
 718
 719             i915->state.Fog[I915_FOGREG_MODE1] &= ~FMC1_C1_MASK;
 720             i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_PIXEL_LINEAR;
 721             i915->state.Fog[I915_FOGREG_MODE1] |=
 722                ((GLuint) (c1 * FMC1_C1_ONE)) & FMC1_C1_MASK;
 723
 724             if (i915->state.Fog[I915_FOGREG_MODE1] & FMC1_FOGINDEX_Z) {
 725                i915->state.Fog[I915_FOGREG_MODE2]
 726                   = (GLuint) (c2 * FMC2_C2_ONE);
 727             }
 728             else {
 729                fi_type fi;
 730                fi.f = c2;
 731                i915->state.Fog[I915_FOGREG_MODE2] = fi.i;
 732             }
 733          }
 734          break;
 735       case GL_EXP:
 736          i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_PIXEL_EXP;
 737          break;
 738       case GL_EXP2:
 739          i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_PIXEL_EXP2;
 740          break;
 741       default:
 742          break;
 743       }
 744    }
 745    else { /* if (i915->vertex_fog != I915_FOG_VERTEX) */
 746       I915_STATECHANGE(i915, I915_UPLOAD_FOG);
 747       i915->state.Fog[I915_FOGREG_MODE1] &= ~FMC1_FOGFUNC_MASK;
 748       i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_VERTEX;
 749       i915->vertex_fog = I915_FOG_VERTEX;
 750    }
 751
 752    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 753    I915_ACTIVESTATE(i915, I915_UPLOAD_FOG, enabled);
 754    if (enabled)
 755       i915->state.Ctx[I915_CTXREG_LIS5] |= S5_FOG_ENABLE;
 756    else
 757       i915->state.Ctx[I915_CTXREG_LIS5] &= ~S5_FOG_ENABLE;
 758
 759    /* Always enable pixel fog.  Vertex fog using fog coord will conflict
 760     * with fog code appended onto fragment program.
 761     */
 762     _tnl_allow_vertex_fog( ctx, 0 );
 763     _tnl_allow_pixel_fog( ctx, 1 );
 764 }
 765
 766 static void
 767 i915Fogfv(GLcontext * ctx, GLenum pname, const GLfloat * param)
 768 {
 769    struct i915_context *i915 = I915_CONTEXT(ctx);
 770
 771    switch (pname) {
 772    case GL_FOG_COORDINATE_SOURCE_EXT:
 773    case GL_FOG_MODE:
 774    case GL_FOG_START:
 775    case GL_FOG_END:
 776       break;
 777
 778    case GL_FOG_DENSITY:
 779       I915_STATECHANGE(i915, I915_UPLOAD_FOG);
 780
 781       if (i915->state.Fog[I915_FOGREG_MODE1] & FMC1_FOGINDEX_Z) {
 782          i915->state.Fog[I915_FOGREG_MODE3] =
 783             (GLuint) (ctx->Fog.Density * FMC3_D_ONE);
 784       }
 785       else {
 786          fi_type fi;
 787          fi.f = ctx->Fog.Density;
 788          i915->state.Fog[I915_FOGREG_MODE3] = fi.i;
 789       }
 790       break;
 791
 792    case GL_FOG_COLOR:
 793       I915_STATECHANGE(i915, I915_UPLOAD_FOG);
 794       i915->state.Fog[I915_FOGREG_COLOR] =
 795          (_3DSTATE_FOG_COLOR_CMD |
 796           ((GLubyte) (ctx->Fog.Color[0] * 255.0F) << 16) |
 797           ((GLubyte) (ctx->Fog.Color[1] * 255.0F) << 8) |
 798           ((GLubyte) (ctx->Fog.Color[2] * 255.0F) << 0));
 799       break;
 800
 801    default:
 802       break;
 803    }
 804 }
 805
 806 static void
 807 i915Hint(GLcontext * ctx, GLenum target, GLenum state)
 808 {
 809    switch (target) {
 810    case GL_FOG_HINT:
 811       break;
 812    default:
 813       break;
 814    }
 815 }
 816
 817 /* =============================================================
 818  */
 819
 820 static void
 821 i915Enable(GLcontext * ctx, GLenum cap, GLboolean state)
 822 {
 823    struct i915_context *i915 = I915_CONTEXT(ctx);
 824
 825    switch (cap) {
 826    case GL_TEXTURE_2D:
 827       break;
 828
 829    case GL_LIGHTING:
 830    case GL_COLOR_SUM:
 831       update_specular(ctx);
 832       break;
 833
 834    case GL_ALPHA_TEST:
 835       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 836       if (state)
 837          i915->state.Ctx[I915_CTXREG_LIS6] |= S6_ALPHA_TEST_ENABLE;
 838       else
 839          i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_ALPHA_TEST_ENABLE;
 840       break;
 841
 842    case GL_BLEND:
 843       i915EvalLogicOpBlendState(ctx);
 844       break;
 845
 846    case GL_COLOR_LOGIC_OP:
 847       i915EvalLogicOpBlendState(ctx);
 848
 849       /* Logicop doesn't seem to work at 16bpp:
 850        */
 851       if (ctx->Visual.rgbBits == 16)
 852          FALLBACK(&i915->intel, I915_FALLBACK_LOGICOP, state);
 853       break;
 854
 855    case GL_FRAGMENT_PROGRAM_ARB:
 856       break;
 857
 858    case GL_DITHER:
 859       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 860       if (state)
 861          i915->state.Ctx[I915_CTXREG_LIS5] |= S5_COLOR_DITHER_ENABLE;
 862       else
 863          i915->state.Ctx[I915_CTXREG_LIS5] &= ~S5_COLOR_DITHER_ENABLE;
 864       break;
 865
 866    case GL_DEPTH_TEST:
 867       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 868       if (state)
 869          i915->state.Ctx[I915_CTXREG_LIS6] |= S6_DEPTH_TEST_ENABLE;
 870       else
 871          i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_DEPTH_TEST_ENABLE;
 872
 873       i915DepthMask(ctx, ctx->Depth.Mask);
 874       break;
 875
 876    case GL_SCISSOR_TEST:
 877       I915_STATECHANGE(i915, I915_UPLOAD_BUFFERS);
 878       if (state)
 879          i915->state.Buffer[I915_DESTREG_SENABLE] =
 880             (_3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT);
 881       else
 882          i915->state.Buffer[I915_DESTREG_SENABLE] =
 883             (_3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT);
 884       break;
 885
 886    case GL_LINE_SMOOTH:
 887       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 888       if (state)
 889          i915->state.Ctx[I915_CTXREG_LIS4] |= S4_LINE_ANTIALIAS_ENABLE;
 890       else
 891          i915->state.Ctx[I915_CTXREG_LIS4] &= ~S4_LINE_ANTIALIAS_ENABLE;
 892       break;
 893
 894    case GL_FOG:
 895       break;
 896
 897    case GL_CULL_FACE:
 898       i915CullFaceFrontFace(ctx, 0);
 899       break;
 900
 901    case GL_STENCIL_TEST:
 902       {
 903          GLboolean hw_stencil = GL_FALSE;
 904          if (ctx->DrawBuffer) {
 905             struct intel_renderbuffer *irbStencil
 906                = intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_STENCIL);
 907             hw_stencil = (irbStencil && irbStencil->region);
 908          }
 909          if (hw_stencil) {
 910             I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 911             if (state)
 912                i915->state.Ctx[I915_CTXREG_LIS5] |= (S5_STENCIL_TEST_ENABLE |
 913                                                      S5_STENCIL_WRITE_ENABLE);
 914             else
 915                i915->state.Ctx[I915_CTXREG_LIS5] &= ~(S5_STENCIL_TEST_ENABLE |
 916                                                       S5_STENCIL_WRITE_ENABLE);
 917          }
 918          else {
 919             FALLBACK(&i915->intel, I915_FALLBACK_STENCIL, state);
 920          }
 921       }
 922       break;
 923
 924    case GL_POLYGON_STIPPLE:
 925       /* The stipple command worked on my 855GM box, but not my 845G.
 926        * I'll do more testing later to find out exactly which hardware
 927        * supports it.  Disabled for now.
 928        */
 929       if (i915->intel.hw_stipple &&
 930           i915->intel.reduced_primitive == GL_TRIANGLES) {
 931          I915_STATECHANGE(i915, I915_UPLOAD_STIPPLE);
 932          if (state)
 933             i915->state.Stipple[I915_STPREG_ST1] |= ST1_ENABLE;
 934          else
 935             i915->state.Stipple[I915_STPREG_ST1] &= ~ST1_ENABLE;
 936       }
 937       break;
 938
 939    case GL_POLYGON_SMOOTH:
 940       break;
 941
 942    case GL_POINT_SMOOTH:
 943       break;
 944
 945    default:
 946       ;
 947    }
 948 }
 949
 950
 951 static void
 952 i915_init_packets(struct i915_context *i915)
 953 {
 954    /* Zero all state */
 955    memset(&i915->state, 0, sizeof(i915->state));
 956
 957
 958    {
 959       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 960       /* Probably don't want to upload all this stuff every time one
 961        * piece changes.
 962        */
 963       i915->state.Ctx[I915_CTXREG_LI] = (_3DSTATE_LOAD_STATE_IMMEDIATE_1 |
 964                                          I1_LOAD_S(2) |
 965                                          I1_LOAD_S(4) |
 966                                          I1_LOAD_S(5) | I1_LOAD_S(6) | (3));
 967       i915->state.Ctx[I915_CTXREG_LIS2] = 0;
 968       i915->state.Ctx[I915_CTXREG_LIS4] = 0;
 969       i915->state.Ctx[I915_CTXREG_LIS5] = 0;
 970
 971       if (i915->intel.ctx.Visual.rgbBits == 16)
 972          i915->state.Ctx[I915_CTXREG_LIS5] |= S5_COLOR_DITHER_ENABLE;
 973
 974
 975       i915->state.Ctx[I915_CTXREG_LIS6] = (S6_COLOR_WRITE_ENABLE |
 976                                            (2 << S6_TRISTRIP_PV_SHIFT));
 977
 978       i915->state.Ctx[I915_CTXREG_STATE4] = (_3DSTATE_MODES_4_CMD |
 979                                              ENABLE_LOGIC_OP_FUNC |
 980                                              LOGIC_OP_FUNC(LOGICOP_COPY) |
 981                                              ENABLE_STENCIL_TEST_MASK |
 982                                              STENCIL_TEST_MASK(0xff) |
 983                                              ENABLE_STENCIL_WRITE_MASK |
 984                                              STENCIL_WRITE_MASK(0xff));
 985
 986       i915->state.Ctx[I915_CTXREG_IAB] =
 987          (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD | IAB_MODIFY_ENABLE |
 988           IAB_MODIFY_FUNC | IAB_MODIFY_SRC_FACTOR | IAB_MODIFY_DST_FACTOR);
 989
 990       i915->state.Ctx[I915_CTXREG_BLENDCOLOR0] =
 991          _3DSTATE_CONST_BLEND_COLOR_CMD;
 992       i915->state.Ctx[I915_CTXREG_BLENDCOLOR1] = 0;
 993
 994       i915->state.Ctx[I915_CTXREG_BF_STENCIL_MASKS] =
 995          _3DSTATE_BACKFACE_STENCIL_MASKS |
 996          BFM_ENABLE_STENCIL_TEST_MASK |
 997          BFM_ENABLE_STENCIL_WRITE_MASK |
 998          (0xff << BFM_STENCIL_WRITE_MASK_SHIFT) |
 999          (0xff << BFM_STENCIL_TEST_MASK_SHIFT);
1000       i915->state.Ctx[I915_CTXREG_BF_STENCIL_OPS] =
1001          _3DSTATE_BACKFACE_STENCIL_OPS |
1002          BFO_ENABLE_STENCIL_REF |
1003          BFO_ENABLE_STENCIL_FUNCS |
1004          BFO_ENABLE_STENCIL_TWO_SIDE;
1005    }
1006
1007    {
1008       I915_STATECHANGE(i915, I915_UPLOAD_STIPPLE);
1009       i915->state.Stipple[I915_STPREG_ST0] = _3DSTATE_STIPPLE;
1010    }
1011
1012
1013    {
1014       I915_STATECHANGE(i915, I915_UPLOAD_FOG);
1015       i915->state.Fog[I915_FOGREG_MODE0] = _3DSTATE_FOG_MODE_CMD;
1016       i915->state.Fog[I915_FOGREG_MODE1] = (FMC1_FOGFUNC_MODIFY_ENABLE |
1017                                             FMC1_FOGFUNC_VERTEX |
1018                                             FMC1_FOGINDEX_MODIFY_ENABLE |
1019                                             FMC1_FOGINDEX_W |
1020                                             FMC1_C1_C2_MODIFY_ENABLE |
1021                                             FMC1_DENSITY_MODIFY_ENABLE);
1022       i915->state.Fog[I915_FOGREG_COLOR] = _3DSTATE_FOG_COLOR_CMD;
1023    }
1024
1025    {
1026       i915->state.Buffer[I915_DESTREG_DV0] = _3DSTATE_DST_BUF_VARS_CMD;
1027
1028       /* scissor */
1029       i915->state.Buffer[I915_DESTREG_SENABLE] =
1030          (_3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT);
1031       i915->state.Buffer[I915_DESTREG_SR0] = _3DSTATE_SCISSOR_RECT_0_CMD;
1032       i915->state.Buffer[I915_DESTREG_SR1] = 0;
1033       i915->state.Buffer[I915_DESTREG_SR2] = 0;
1034    }
1035
1036
1037 #if 0
1038    {
1039       I915_STATECHANGE(i915, I915_UPLOAD_DEFAULTS);
1040       i915->state.Default[I915_DEFREG_C0] = _3DSTATE_DEFAULT_DIFFUSE;
1041       i915->state.Default[I915_DEFREG_C1] = 0;
1042       i915->state.Default[I915_DEFREG_S0] = _3DSTATE_DEFAULT_SPECULAR;
1043       i915->state.Default[I915_DEFREG_S1] = 0;
1044       i915->state.Default[I915_DEFREG_Z0] = _3DSTATE_DEFAULT_Z;
1045       i915->state.Default[I915_DEFREG_Z1] = 0;
1046    }
1047 #endif
1048
1049
1050    /* These will be emitted every at the head of every buffer, unless
1051     * we get hardware contexts working.
1052     */
1053    i915->state.active = (I915_UPLOAD_PROGRAM |
1054                          I915_UPLOAD_STIPPLE |
1055                          I915_UPLOAD_CTX |
1056                          I915_UPLOAD_BUFFERS | I915_UPLOAD_INVARIENT);
1057 }
1058
1059 void
1060 i915InitStateFunctions(struct dd_function_table *functions)
1061 {
1062    functions->AlphaFunc = i915AlphaFunc;
1063    functions->BlendColor = i915BlendColor;
1064    functions->BlendEquationSeparate = i915BlendEquationSeparate;
1065    functions->BlendFuncSeparate = i915BlendFuncSeparate;
1066    functions->ColorMask = i915ColorMask;
1067    functions->CullFace = i915CullFaceFrontFace;
1068    functions->DepthFunc = i915DepthFunc;
1069    functions->DepthMask = i915DepthMask;
1070    functions->Enable = i915Enable;
1071    functions->Fogfv = i915Fogfv;
1072    functions->FrontFace = i915CullFaceFrontFace;
1073    functions->Hint = i915Hint;
1074    functions->LightModelfv = i915LightModelfv;
1075    functions->LineWidth = i915LineWidth;
1076    functions->LogicOpcode = i915LogicOp;
1077    functions->PointSize = i915PointSize;
1078    functions->PolygonStipple = i915PolygonStipple;
1079    functions->Scissor = i915Scissor;
1080    functions->ShadeModel = i915ShadeModel;
1081    functions->StencilFuncSeparate = i915StencilFuncSeparate;
1082    functions->StencilMaskSeparate = i915StencilMaskSeparate;
1083    functions->StencilOpSeparate = i915StencilOpSeparate;
1084    functions->DepthRange = i915DepthRange;
1085    functions->Viewport = i915Viewport;
1086 }
1087
1088
1089 void
1090 i915InitState(struct i915_context *i915)
1091 {
1092    GLcontext *ctx = &i915->intel.ctx;
1093
1094    i915_init_packets(i915);
1095
1096    _mesa_init_driver_state(ctx);
1097
1098    memcpy(&i915->initial, &i915->state, sizeof(i915->state));
1099    i915->current = &i915->state;
1100 }