fxsetup.h

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

         colorComb.ModeB   = GR_FUNC_MODE_NEGATIVE_X;
         colorComb.SourceC = GR_CMBX_LOCAL_TEXTURE_RGB;
         colorComb.InvertC = FXFALSE;
         colorComb.SourceD = GR_CMBX_B;
      }

      fxMesa->Glide.grConstantColorValueExt(tmu,
         (((GLuint)(envColor[0] * 255.0f))      ) |
         (((GLuint)(envColor[1] * 255.0f)) <<  8) |
         (((GLuint)(envColor[2] * 255.0f)) << 16) |
         (((GLuint)(envColor[3] * 255.0f)) << 24));
      break;
   case GL_REPLACE:
      if (ifmt == GL_LUMINANCE || ifmt == GL_RGB) {
         alphaComb.SourceA = locala;
         alphaComb.ModeA   = GR_FUNC_MODE_X;
         alphaComb.SourceB = GR_CMBX_ZERO;
         alphaComb.ModeB   = GR_FUNC_MODE_X;
         alphaComb.SourceC = GR_CMBX_ZERO;
         alphaComb.InvertC = FXTRUE;
         alphaComb.SourceD = GR_CMBX_ZERO;
      } else {
         alphaComb.SourceA = GR_CMBX_LOCAL_TEXTURE_ALPHA;
         alphaComb.ModeA   = GR_FUNC_MODE_X;
         alphaComb.SourceB = GR_CMBX_ZERO;
         alphaComb.ModeB   = GR_FUNC_MODE_X;
         alphaComb.SourceC = GR_CMBX_ZERO;
         alphaComb.InvertC = FXTRUE;
         alphaComb.SourceD = GR_CMBX_ZERO;
      }

      if (ifmt == GL_ALPHA) {
         colorComb.SourceA = localc;
         colorComb.ModeA   = GR_FUNC_MODE_X;
         colorComb.SourceB = GR_CMBX_ZERO;
         colorComb.ModeB   = GR_FUNC_MODE_X;
         colorComb.SourceC = GR_CMBX_ZERO;
         colorComb.InvertC = FXTRUE;
         colorComb.SourceD = GR_CMBX_ZERO;
      } else {
         colorComb.SourceA = GR_CMBX_LOCAL_TEXTURE_RGB;
         colorComb.ModeA   = GR_FUNC_MODE_X;
         colorComb.SourceB = GR_CMBX_ZERO;
         colorComb.ModeB   = GR_FUNC_MODE_X;
         colorComb.SourceC = GR_CMBX_ZERO;
         colorComb.InvertC = FXTRUE;
         colorComb.SourceD = GR_CMBX_ZERO;
      }
      break;
   case GL_ADD:
      if (ifmt == GL_LUMINANCE || ifmt == GL_RGB) {
         alphaComb.SourceA = locala;
         alphaComb.ModeA   = GR_FUNC_MODE_X;
         alphaComb.SourceB = GR_CMBX_ZERO;
         alphaComb.ModeB   = GR_FUNC_MODE_X;
         alphaComb.SourceC = GR_CMBX_ZERO;
         alphaComb.InvertC = FXTRUE;
         alphaComb.SourceD = GR_CMBX_ZERO;
      } else if (ifmt == GL_INTENSITY) {
         alphaComb.SourceA = locala;
         alphaComb.ModeA   = GR_FUNC_MODE_X;
         alphaComb.SourceB = GR_CMBX_LOCAL_TEXTURE_ALPHA;
         alphaComb.ModeB   = GR_FUNC_MODE_X;
         alphaComb.SourceC = GR_CMBX_ZERO;
         alphaComb.InvertC = FXTRUE;
         alphaComb.SourceD = GR_CMBX_ZERO;
      } else {
         alphaComb.SourceA = locala;
         alphaComb.ModeA   = GR_FUNC_MODE_X;
         alphaComb.SourceB = GR_CMBX_ZERO;
         alphaComb.ModeB   = GR_FUNC_MODE_X;
         alphaComb.SourceC = GR_CMBX_LOCAL_TEXTURE_ALPHA;
         alphaComb.InvertC = FXFALSE;
         alphaComb.SourceD = GR_CMBX_ZERO;
      }

      if (ifmt == GL_ALPHA) {
         colorComb.SourceA = localc;
         colorComb.ModeA   = GR_FUNC_MODE_X;
         colorComb.SourceB = GR_CMBX_ZERO;
         colorComb.ModeB   = GR_FUNC_MODE_X;
         colorComb.SourceC = GR_CMBX_ZERO;
         colorComb.InvertC = FXTRUE;
         colorComb.SourceD = GR_CMBX_ZERO;
      } else {
         colorComb.SourceA = localc;
         colorComb.ModeA   = GR_FUNC_MODE_X;
         colorComb.SourceB = GR_CMBX_LOCAL_TEXTURE_RGB;
         colorComb.ModeB   = GR_FUNC_MODE_X;
         colorComb.SourceC = GR_CMBX_ZERO;
         colorComb.InvertC = FXTRUE;
         colorComb.SourceD = GR_CMBX_ZERO;
      }
      break;
    /* COMBINE_EXT */
    case GL_COMBINE_EXT:
      /* XXX todo - INCOMPLETE!!! */
      if (TDFX_DEBUG & (VERBOSE_DRIVER | VERBOSE_TEXTURE)) {
#if 1
         fprintf(stderr, "COMBINE_EXT: %s + %s\n",
	      _mesa_lookup_enum_by_nr(texUnit->Combine.ModeRGB),
	      _mesa_lookup_enum_by_nr(texUnit->Combine.ModeA));
#else
         fprintf(stderr, "Texture Unit %d\n", textureset);
         fprintf(stderr, "  GL_TEXTURE_ENV_MODE = %s\n", _mesa_lookup_enum_by_nr(texUnit->EnvMode));
         fprintf(stderr, "  GL_COMBINE_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.ModeRGB));
         fprintf(stderr, "  GL_COMBINE_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.ModeA));
         fprintf(stderr, "  GL_SOURCE0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[0]));
         fprintf(stderr, "  GL_SOURCE1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[1]));
         fprintf(stderr, "  GL_SOURCE2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[2]));
         fprintf(stderr, "  GL_SOURCE0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[0]));
         fprintf(stderr, "  GL_SOURCE1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[1]));
         fprintf(stderr, "  GL_SOURCE2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[2]));
         fprintf(stderr, "  GL_OPERAND0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[0]));
         fprintf(stderr, "  GL_OPERAND1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[1]));
         fprintf(stderr, "  GL_OPERAND2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[2]));
         fprintf(stderr, "  GL_OPERAND0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[0]));
         fprintf(stderr, "  GL_OPERAND1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[1]));
         fprintf(stderr, "  GL_OPERAND2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[2]));
         fprintf(stderr, "  GL_RGB_SCALE = %d\n", 1 << texUnit->Combine.ScaleShiftRGB);
         fprintf(stderr, "  GL_ALPHA_SCALE = %d\n", 1 << texUnit->Combine.ScaleShiftA);
         fprintf(stderr, "  GL_TEXTURE_ENV_COLOR = (%f, %f, %f, %f)\n", envColor[0], envColor[1], envColor[2], envColor[3]);
#endif
      }

      alphaComb.Shift   = texUnit->Combine.ScaleShiftA;
      colorComb.Shift   = texUnit->Combine.ScaleShiftRGB;

      switch (texUnit->Combine.ModeRGB) {
             case GL_MODULATE:
                  /* Arg0 * Arg1 == (A + 0) * C + 0 */
                  TEXENV_SETUP_ARG_RGB(colorComb.SourceA,
                                       texUnit->Combine.SourceRGB[0],
                                       texUnit->Combine.OperandRGB[0],
                                       localc, locala);
                  TEXENV_SETUP_MODE_RGB(colorComb.ModeA,
                                        texUnit->Combine.OperandRGB[0]);
                  colorComb.SourceB = GR_CMBX_ZERO;
                  colorComb.ModeB   = GR_FUNC_MODE_ZERO;
                  TEXENV_SETUP_ARG_RGB(colorComb.SourceC,
                                       texUnit->Combine.SourceRGB[1],
                                       texUnit->Combine.OperandRGB[1],
                                       localc, locala);
                  colorComb.InvertC = TEXENV_OPERAND_INVERTED(
                                       texUnit->Combine.OperandRGB[1]);
                  colorComb.SourceD = GR_CMBX_ZERO;
                  break;
             case GL_REPLACE:
                  /* Arg0 == (A + 0) * 1 + 0 */
                  TEXENV_SETUP_ARG_RGB(colorComb.SourceA,
                                       texUnit->Combine.SourceRGB[0],
                                       texUnit->Combine.OperandRGB[0],
                                       localc, locala);
                  TEXENV_SETUP_MODE_RGB(colorComb.ModeA,
                                        texUnit->Combine.OperandRGB[0]);
                  colorComb.SourceB = GR_CMBX_ZERO;
                  colorComb.ModeB   = GR_FUNC_MODE_ZERO;
                  colorComb.SourceC = GR_CMBX_ZERO;
                  colorComb.InvertC = FXTRUE;
                  colorComb.SourceD = GR_CMBX_ZERO;
                  break;
             case GL_ADD:
                  /* Arg0 + Arg1 = (A + B) * 1 + 0 */
                  TEXENV_SETUP_ARG_RGB(colorComb.SourceA,
                                       texUnit->Combine.SourceRGB[0],
                                       texUnit->Combine.OperandRGB[0],
                                       localc, locala);
                  TEXENV_SETUP_MODE_RGB(colorComb.ModeA,
                                        texUnit->Combine.OperandRGB[0]);
                  TEXENV_SETUP_ARG_RGB(colorComb.SourceB,
                                       texUnit->Combine.SourceRGB[1],
                                       texUnit->Combine.OperandRGB[1],
                                       localc, locala);
                  TEXENV_SETUP_MODE_RGB(colorComb.ModeB,
                                        texUnit->Combine.OperandRGB[1]);
                  colorComb.SourceC = GR_CMBX_ZERO;
                  colorComb.InvertC = FXTRUE;
                  colorComb.SourceD = GR_CMBX_ZERO;
                  break;
             case GL_INTERPOLATE_EXT:
                  /* Arg0 * Arg2 + Arg1 * (1 - Arg2) ==
                   * (Arg0 - Arg1) * Arg2 + Arg1 == (A - B) * C + D
                   */
                  TEXENV_SETUP_ARG_RGB(colorComb.SourceA,
                                       texUnit->Combine.SourceRGB[0],
                                       texUnit->Combine.OperandRGB[0],
                                       localc, locala);
                  TEXENV_SETUP_MODE_RGB(colorComb.ModeA,
                                        texUnit->Combine.OperandRGB[0]);
                  TEXENV_SETUP_ARG_RGB(colorComb.SourceB,
                                       texUnit->Combine.SourceRGB[1],
                                       texUnit->Combine.OperandRGB[1],
                                       localc, locala);
                  if (TEXENV_OPERAND_INVERTED(texUnit->Combine.OperandRGB[1])) {
                     /* Hack alert!!! This case is wrong!!! */
                     fprintf(stderr, "COMBINE_EXT_color: WRONG!!!\n");
                     colorComb.ModeB = GR_FUNC_MODE_NEGATIVE_X;
                  } else {
                     colorComb.ModeB = GR_FUNC_MODE_NEGATIVE_X;
                  }
                  /*
                   * The Source/Operand for the C value must
                   * specify some kind of alpha value.
                   */
                  TEXENV_SETUP_ARG_A(colorComb.SourceC,
                                     texUnit->Combine.SourceRGB[2],
                                     texUnit->Combine.OperandRGB[2],
                                     locala);
                  colorComb.InvertC = FXFALSE;
                  colorComb.SourceD = GR_CMBX_B;
                  break;
             default:
                  fprintf(stderr, "COMBINE_EXT_color: %s\n",
                                  _mesa_lookup_enum_by_nr(texUnit->Combine.ModeRGB));
      }

      switch (texUnit->Combine.ModeA) {
             case GL_MODULATE:
                  /* Arg0 * Arg1 == (A + 0) * C + 0 */
                  TEXENV_SETUP_ARG_A(alphaComb.SourceA,
                                     texUnit->Combine.SourceA[0],
                                     texUnit->Combine.OperandA[0],
                                     locala);
                  TEXENV_SETUP_MODE_A(alphaComb.ModeA,
                                      texUnit->Combine.OperandA[0]);
                  alphaComb.SourceB = GR_CMBX_ZERO;
                  alphaComb.ModeB   = GR_FUNC_MODE_ZERO;
                  TEXENV_SETUP_ARG_A(alphaComb.SourceC,
                                     texUnit->Combine.SourceA[1],
                                     texUnit->Combine.OperandA[1],
                                     locala);
                  alphaComb.InvertC = TEXENV_OPERAND_INVERTED(
                                       texUnit->Combine.OperandA[1]);
                  alphaComb.SourceD = GR_CMBX_ZERO;
                  break;
             case GL_REPLACE:
                 /* Arg0 == (A + 0) * 1 + 0 */
                  TEXENV_SETUP_ARG_A(alphaComb.SourceA,
                                     texUnit->Combine.SourceA[0],
                                     texUnit->Combine.OperandA[0],
                                     locala);
                  TEXENV_SETUP_MODE_A(alphaComb.ModeA,
                                      texUnit->Combine.OperandA[0]);
                  alphaComb.SourceB = GR_CMBX_ZERO;
                  alphaComb.ModeB   = GR_FUNC_MODE_ZERO;
                  alphaComb.SourceC = GR_CMBX_ZERO;
                  alphaComb.InvertC = FXTRUE;
                  alphaComb.SourceD = GR_CMBX_ZERO;
                  break;
             case GL_ADD:
                  /* Arg0 + Arg1 = (A + B) * 1 + 0 */
                  TEXENV_SETUP_ARG_A(alphaComb.SourceA,
                                     texUnit->Combine.SourceA[0],
                                     texUnit->Combine.OperandA[0],
                                     locala);
                  TEXENV_SETUP_MODE_A(alphaComb.ModeA,
                                      texUnit->Combine.OperandA[0]);
                  TEXENV_SETUP_ARG_A(alphaComb.SourceB,
                                     texUnit->Combine.SourceA[1],
                                     texUnit->Combine.OperandA[1],
                                     locala);
                  TEXENV_SETUP_MODE_A(alphaComb.ModeB,
                                      texUnit->Combine.OperandA[1]);
                  alphaComb.SourceC = GR_CMBX_ZERO;
                  alphaComb.InvertC = FXTRUE;
                  alphaComb.SourceD = GR_CMBX_ZERO;
                  break;
             default:
                  fprintf(stderr, "COMBINE_EXT_alpha: %s\n",
                                  _mesa_lookup_enum_by_nr(texUnit->Combine.ModeA));
      }

      fxMesa->Glide.grConstantColorValueExt(tmu,
         (((GLuint)(envColor[0] * 255.0f))      ) |
         (((GLuint)(envColor[1] * 255.0f)) <<  8) |
         (((GLuint)(envColor[2] * 255.0f)) << 16) |
         (((GLuint)(envColor[3] * 255.0f)) << 24));
      break;

   default:
      if (TDFX_DEBUG & VERBOSE_DRIVER) {
	 fprintf(stderr, "fxSetupTextureEnvNapalm_NoLock: %x Texture.EnvMode not yet supported\n",
		 texUnit->EnvMode);
      }