fxsetup.c

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

       */
      if (ti->LODblend && (TDFX_DEBUG & VERBOSE_DRIVER)) {
	 fprintf(stderr, "fxSetupSingleTMU_NoLock: not blending texture - only one tmu\n");
      }

      grTexClampMode(tmu, ti->sClamp, ti->tClamp);
      grTexFilterMode(tmu, ti->minFilt, ti->maxFilt);
      grTexMipMapMode(tmu, ti->mmMode, FXFALSE);

      grTexSource(tmu, ti->tm[tmu]->startAddr, GR_MIPMAPLEVELMASK_BOTH, &(ti->info));
   }
}

static void
fxSelectSingleTMUSrc_NoLock(fxMesaContext fxMesa, GLint tmu, FxBool LODblend)
{
   struct tdfx_texcombine tex0, tex1;

   if (TDFX_DEBUG & VERBOSE_DRIVER) {
      fprintf(stderr, "fxSelectSingleTMUSrc_NoLock(%d, %d)\n", tmu, LODblend);
   }

   tex0.InvertRGB     = FXFALSE;
   tex0.InvertAlpha   = FXFALSE;
   tex1.InvertRGB     = FXFALSE;
   tex1.InvertAlpha   = FXFALSE;

   if (LODblend) {
      tex0.FunctionRGB   = GR_COMBINE_FUNCTION_BLEND;
      tex0.FactorRGB     = GR_COMBINE_FACTOR_ONE_MINUS_LOD_FRACTION;
      tex0.FunctionAlpha = GR_COMBINE_FUNCTION_BLEND;
      tex0.FactorAlpha   = GR_COMBINE_FACTOR_ONE_MINUS_LOD_FRACTION;

      tex1.FunctionRGB   = GR_COMBINE_FUNCTION_LOCAL;
      tex1.FactorRGB     = GR_COMBINE_FACTOR_NONE;
      tex1.FunctionAlpha = GR_COMBINE_FUNCTION_LOCAL;
      tex1.FactorAlpha   = GR_COMBINE_FACTOR_NONE;

      fxMesa->tmuSrc = FX_TMU_SPLIT;
   }
   else {
      if (tmu != FX_TMU1) {
         tex0.FunctionRGB   = GR_COMBINE_FUNCTION_LOCAL;
         tex0.FactorRGB     = GR_COMBINE_FACTOR_NONE;
         tex0.FunctionAlpha = GR_COMBINE_FUNCTION_LOCAL;
         tex0.FactorAlpha   = GR_COMBINE_FACTOR_NONE;

         tex1.FunctionRGB   = GR_COMBINE_FUNCTION_ZERO;
         tex1.FactorRGB     = GR_COMBINE_FACTOR_NONE;
         tex1.FunctionAlpha = GR_COMBINE_FUNCTION_ZERO;
         tex1.FactorAlpha   = GR_COMBINE_FACTOR_NONE;

	 fxMesa->tmuSrc = FX_TMU0;
      }
      else {
         tex1.FunctionRGB   = GR_COMBINE_FUNCTION_LOCAL;
         tex1.FactorRGB     = GR_COMBINE_FACTOR_NONE;
         tex1.FunctionAlpha = GR_COMBINE_FUNCTION_LOCAL;
         tex1.FactorAlpha   = GR_COMBINE_FACTOR_NONE;

	 /* correct values to set TMU0 in passthrough mode */
         tex0.FunctionRGB   = GR_COMBINE_FUNCTION_BLEND;
         tex0.FactorRGB     = GR_COMBINE_FACTOR_ONE;
         tex0.FunctionAlpha = GR_COMBINE_FUNCTION_BLEND;
         tex0.FactorAlpha   = GR_COMBINE_FACTOR_ONE;

	 fxMesa->tmuSrc = FX_TMU1;
      }
   }

   grTexCombine(GR_TMU0,
                tex0.FunctionRGB,
                tex0.FactorRGB,
                tex0.FunctionAlpha,
                tex0.FactorAlpha,
                tex0.InvertRGB,
                tex0.InvertAlpha);
   if (fxMesa->haveTwoTMUs) {
      grTexCombine(GR_TMU1,
                   tex1.FunctionRGB,
                   tex1.FactorRGB,
                   tex1.FunctionAlpha,
                   tex1.FactorAlpha,
                   tex1.InvertRGB,
                   tex1.InvertAlpha);
   }
}

static void
fxSetupTextureSingleTMU_NoLock(GLcontext * ctx, GLuint textureset)
{
   fxMesaContext fxMesa = FX_CONTEXT(ctx);
   struct tdfx_combine alphaComb, colorComb;
   GrCombineLocal_t localc, locala;
   GLuint unitsmode;
   GLint ifmt;
   tfxTexInfo *ti;
   struct gl_texture_object *tObj = ctx->Texture.Unit[textureset]._Current;
   int tmu;

   if (TDFX_DEBUG & VERBOSE_DRIVER) {
      fprintf(stderr, "fxSetupTextureSingleTMU_NoLock(%d)\n", textureset);
   }

   ti = fxTMGetTexInfo(tObj);

   fxTexValidate(ctx, tObj);

   fxSetupSingleTMU_NoLock(fxMesa, tObj);

   if (ti->whichTMU == FX_TMU_BOTH)
      tmu = FX_TMU0;
   else
      tmu = ti->whichTMU;
   if (fxMesa->tmuSrc != tmu)
      fxSelectSingleTMUSrc_NoLock(fxMesa, tmu, ti->LODblend);

   if (textureset == 0 || !fxMesa->haveTwoTMUs)
      unitsmode = fxGetTexSetConfiguration(ctx, tObj, NULL);
   else
      unitsmode = fxGetTexSetConfiguration(ctx, NULL, tObj);

/*    if(fxMesa->lastUnitsMode==unitsmode) */
/*      return; */

   fxMesa->lastUnitsMode = unitsmode;

   fxMesa->stw_hint_state = 0;
   FX_grHints_NoLock(GR_HINT_STWHINT, 0);

   ifmt = ti->baseLevelInternalFormat;

   if (unitsmode & FX_UM_ALPHA_ITERATED)
      locala = GR_COMBINE_LOCAL_ITERATED;
   else
      locala = GR_COMBINE_LOCAL_CONSTANT;

   if (unitsmode & FX_UM_COLOR_ITERATED)
      localc = GR_COMBINE_LOCAL_ITERATED;
   else
      localc = GR_COMBINE_LOCAL_CONSTANT;

   if (TDFX_DEBUG & (VERBOSE_DRIVER | VERBOSE_TEXTURE))
      fprintf(stderr, "fxSetupTextureSingleTMU_NoLock: envmode is %s\n",
	      _mesa_lookup_enum_by_nr(ctx->Texture.Unit[textureset].EnvMode));

   alphaComb.Local    = locala;
   alphaComb.Invert   = FXFALSE;
   colorComb.Local    = localc;
   colorComb.Invert   = FXFALSE;

   switch (ctx->Texture.Unit[textureset].EnvMode) {
   case GL_DECAL:
      alphaComb.Function = GR_COMBINE_FUNCTION_LOCAL;
      alphaComb.Factor   = GR_COMBINE_FACTOR_NONE;
      alphaComb.Other    = GR_COMBINE_OTHER_NONE;

      colorComb.Function = GR_COMBINE_FUNCTION_BLEND;
      colorComb.Factor   = GR_COMBINE_FACTOR_TEXTURE_ALPHA;
      colorComb.Other    = GR_COMBINE_OTHER_TEXTURE;
      break;
   case GL_MODULATE:
      alphaComb.Function = GR_COMBINE_FUNCTION_SCALE_OTHER;
      alphaComb.Factor   = GR_COMBINE_FACTOR_LOCAL;
      alphaComb.Other    = GR_COMBINE_OTHER_TEXTURE;

      if (ifmt == GL_ALPHA) {
         colorComb.Function = GR_COMBINE_FUNCTION_LOCAL;
         colorComb.Factor   = GR_COMBINE_FACTOR_NONE;
         colorComb.Other    = GR_COMBINE_OTHER_NONE;
      } else {
         colorComb.Function = GR_COMBINE_FUNCTION_SCALE_OTHER;
         colorComb.Factor   = GR_COMBINE_FACTOR_LOCAL;
         colorComb.Other    = GR_COMBINE_OTHER_TEXTURE;
      }
      break;
   case GL_BLEND:
      if (ifmt == GL_LUMINANCE || ifmt == GL_RGB) {
         /* Av = Af */
         alphaComb.Function = GR_COMBINE_FUNCTION_LOCAL;
         alphaComb.Factor   = GR_COMBINE_FACTOR_NONE;
         alphaComb.Other    = GR_COMBINE_OTHER_NONE;
      }
      else if (ifmt == GL_INTENSITY) {
         /* Av = Af * (1 - It) + Ac * It */
         alphaComb.Function = GR_COMBINE_FUNCTION_BLEND;
         alphaComb.Factor   = GR_COMBINE_FACTOR_TEXTURE_ALPHA;
         alphaComb.Other    = GR_COMBINE_OTHER_CONSTANT;
      }
      else {
         /* Av = Af * At */
         alphaComb.Function = GR_COMBINE_FUNCTION_SCALE_OTHER;
         alphaComb.Factor   = GR_COMBINE_FACTOR_LOCAL;
         alphaComb.Other    = GR_COMBINE_OTHER_TEXTURE;
      }

      if (ifmt == GL_ALPHA) {
         colorComb.Function = GR_COMBINE_FUNCTION_LOCAL;
         colorComb.Factor   = GR_COMBINE_FACTOR_NONE;
         colorComb.Other    = GR_COMBINE_OTHER_NONE;
      } else {
         if (fxMesa->type >= GR_SSTTYPE_Voodoo2) {
            colorComb.Function = GR_COMBINE_FUNCTION_BLEND;
            colorComb.Factor   = GR_COMBINE_FACTOR_TEXTURE_RGB;
            colorComb.Other    = GR_COMBINE_OTHER_CONSTANT;
         } else if (ifmt == GL_INTENSITY) {
            /* just a hack: RGB == ALPHA */
            colorComb.Function = GR_COMBINE_FUNCTION_BLEND;
            colorComb.Factor   = GR_COMBINE_FACTOR_TEXTURE_ALPHA;
            colorComb.Other    = GR_COMBINE_OTHER_CONSTANT;
         } else {
            /* Only Voodoo^2 can GL_BLEND (GR_COMBINE_FACTOR_TEXTURE_RGB)
             * These settings assume that the TexEnv color is black and
             * incoming fragment color is white.
             */
            colorComb.Function = GR_COMBINE_FUNCTION_SCALE_OTHER;
            colorComb.Factor   = GR_COMBINE_FACTOR_ONE;
            colorComb.Other    = GR_COMBINE_OTHER_TEXTURE;
            colorComb.Invert   = FXTRUE;
            _mesa_problem(NULL, "can't GL_BLEND with SST1");
         }
      }

      grConstantColorValue(
         (((GLuint)(ctx->Texture.Unit[textureset].EnvColor[0] * 255.0f))      ) |
         (((GLuint)(ctx->Texture.Unit[textureset].EnvColor[1] * 255.0f)) <<  8) |
         (((GLuint)(ctx->Texture.Unit[textureset].EnvColor[2] * 255.0f)) << 16) |
         (((GLuint)(ctx->Texture.Unit[textureset].EnvColor[3] * 255.0f)) << 24));
      break;
   case GL_REPLACE:
      if ((ifmt == GL_RGB) || (ifmt == GL_LUMINANCE)) {
         alphaComb.Function = GR_COMBINE_FUNCTION_LOCAL;
         alphaComb.Factor   = GR_COMBINE_FACTOR_NONE;
         alphaComb.Other    = GR_COMBINE_OTHER_NONE;
      } else {
         alphaComb.Function = GR_COMBINE_FUNCTION_SCALE_OTHER;
         alphaComb.Factor   = GR_COMBINE_FACTOR_ONE;
         alphaComb.Other    = GR_COMBINE_OTHER_TEXTURE;
      }

      if (ifmt == GL_ALPHA) {
         colorComb.Function = GR_COMBINE_FUNCTION_LOCAL;
         colorComb.Factor   = GR_COMBINE_FACTOR_NONE;
         colorComb.Other    = GR_COMBINE_OTHER_NONE;
      } else {
         colorComb.Function = GR_COMBINE_FUNCTION_SCALE_OTHER;
         colorComb.Factor   = GR_COMBINE_FACTOR_ONE;
         colorComb.Other    = GR_COMBINE_OTHER_TEXTURE;
      }
      break;
   case GL_ADD:
      if (ifmt == GL_ALPHA ||
          ifmt == GL_LUMINANCE_ALPHA ||
          ifmt == GL_RGBA) {
         /* product of texel and fragment alpha */
         alphaComb.Function = GR_COMBINE_FUNCTION_SCALE_OTHER;
         alphaComb.Factor   = GR_COMBINE_FACTOR_LOCAL;
         alphaComb.Other    = GR_COMBINE_OTHER_TEXTURE;
      }
      else if (ifmt == GL_LUMINANCE || ifmt == GL_RGB) {
         /* fragment alpha is unchanged */
         alphaComb.Function = GR_COMBINE_FUNCTION_LOCAL;
         alphaComb.Factor   = GR_COMBINE_FACTOR_NONE;
         alphaComb.Other    = GR_COMBINE_OTHER_NONE;
      }
      else {
         /* sum of texel and fragment alpha */
         alphaComb.Function = GR_COMBINE_FUNCTION_SCALE_OTHER_ADD_LOCAL;
         alphaComb.Factor   = GR_COMBINE_FACTOR_ONE;
         alphaComb.Other    = GR_COMBINE_OTHER_TEXTURE;
      }

      if (ifmt == GL_ALPHA) {
         /* rgb unchanged */
         colorComb.Function = GR_COMBINE_FUNCTION_LOCAL;
         colorComb.Factor   = GR_COMBINE_FACTOR_NONE;
         colorComb.Other    = GR_COMBINE_OTHER_NONE;
      }
      else {
         /* sum of texel and fragment rgb */
         colorComb.Function = GR_COMBINE_FUNCTION_SCALE_OTHER_ADD_LOCAL;
         colorComb.Factor   = GR_COMBINE_FACTOR_ONE;
         colorComb.Other    = GR_COMBINE_OTHER_TEXTURE;
      }
      break;
   default:
      if (TDFX_DEBUG & VERBOSE_DRIVER) {
	 fprintf(stderr, "fxSetupTextureSingleTMU_NoLock: %x Texture.EnvMode not yet supported\n",
		 ctx->Texture.Unit[textureset].EnvMode);
      }
      return;
   }

   grAlphaCombine(alphaComb.Function,
                  alphaComb.Factor,
                  alphaComb.Local,
                  alphaComb.Other,
                  alphaComb.Invert);
   grColorCombine(colorComb.Function,
                  colorComb.Factor,
                  colorComb.Local,
                  colorComb.Other,
                  colorComb.Invert);
}

#if 00
static void
fxSetupTextureSingleTMU(GLcontext * ctx, GLuint textureset)
{
   BEGIN_BOARD_LOCK();
   fxSetupTextureSingleTMU_NoLock(ctx, textureset);
   END_BOARD_LOCK();
}
#endif


/************************* Double Texture Set ***************************/

static void
fxSetupDoubleTMU_NoLock(fxMesaContext fxMesa,
			struct gl_texture_object *tObj0,
			struct gl_texture_object *tObj1)
{
#define T0_NOT_IN_TMU  0x01
#define T1_NOT_IN_TMU  0x02
#define T0_IN_TMU0     0x04
#define T1_IN_TMU0     0x08
#define T0_IN_TMU1     0x10
#define T1_IN_TMU1     0x20

   tfxTexInfo *ti0 = fxTMGetTexInfo(tObj0);
   tfxTexInfo *ti1 = fxTMGetTexInfo(tObj1);
   GLuint tstate = 0;
   int tmu0 = 0, tmu1 = 1;

   if (TDFX_DEBUG & VERBOSE_DRIVER) {
      fprintf(stderr, "fxSetupDoubleTMU_NoLock(...)\n");
   }

   /* We shouldn't need to do this. There is something wrong with
      mutlitexturing when the TMUs are swapped. So, we're forcing
      them to always be loaded correctly. !!! */
   if (ti0->whichTMU == FX_TMU1)
      fxTMMoveOutTM_NoLock(fxMesa, tObj0);
   if (ti1->whichTMU == FX_TMU0)
      fxTMMoveOutTM_NoLock(fxMesa, tObj1);

   if (ti0->isInTM) {
      switch (ti0->whichTMU) {
      case FX_TMU0:
	 tstate |= T0_IN_TMU0;
	 break;
      case FX_TMU1:
	 tstate |= T0_IN_TMU1;
	 break;
      case FX_TMU_BOTH:
	 tstate |= T0_IN_TMU0 | T0_IN_TMU1;
	 break;
      case FX_TMU_SPLIT:
	 tstate |= T0_NOT_IN_TMU;
	 break;
      }
   }
   else
      tstate |= T0_NOT_IN_TMU;

   if (ti1->isInTM) {
      switch (ti1->whichTMU) {
      case FX_TMU0:
	 tstate |= T1_IN_TMU0;
	 break;
      case FX_TMU1:
	 tstate |= T1_IN_TMU1;
	 break;
      case FX_TMU_BOTH:
	 tstate |= T1_IN_TMU0 | T1_IN_TMU1;
	 break;
      case FX_TMU_SPLIT:
	 tstate |= T1_NOT_IN_TMU;
	 break;
      }
   }
   else
      tstate |= T1_NOT_IN_TMU;

   ti0->lastTimeUsed = fxMesa->texBindNumber;
   ti1->lastTimeUsed = fxMesa->texBindNumber;

   /* Move texture maps into TMUs */

   if (!(((tstate & T0_IN_TMU0) && (tstate & T1_IN_TMU1)) ||
	 ((tstate & T0_IN_TMU1) && (tstate & T1_IN_TMU0)))) {
      if (tObj0 == tObj1)
	 fxTMMoveInTM_NoLock(fxMesa, tObj1, FX_TMU_BOTH);
      else {
	 /* Find the minimal way to correct the situation */
	 if ((tstate & T0_IN_TMU0) || (tstate & T1_IN_TMU1)) {
	    /* We have one in the standard order, setup the other */
	    if (tstate & T0_IN_TMU0) {	/* T0 is in TMU0, put T1 in TMU1 */
	       fxTMMoveInTM_NoLock(fxMesa, tObj1, FX_TMU1);
	    }
	    else {
	       fxTMMoveInTM_NoLock(fxMesa, tObj0, FX_TMU0);
	    }
	    /* tmu0 and tmu1 are setup */
	 }
	 else if ((tstate & T0_IN_TMU1) || (tstate & T1_IN_TMU0)) {
	    /* we have one in the reverse order, setup the other */
	    if (tstate & T1_IN_TMU0) {	/* T1 is in TMU0, put T0 in TMU1 */
	       fxTMMoveInTM_NoLock(fxMesa, tObj0, FX_TMU1);
	    }
	    else {
	       fxTMMoveInTM_NoLock(fxMesa, tObj1, FX_TMU0);
	    }