r200_texstate.c

mesa-6.5-minigui源码

      case GL_MODULATE_SIGNED_ADD_ATI:
	 alpha_combine = (R200_TXA_BIAS_ARG_C |	/* new */
			  R200_TXA_OP_MADD); /* was ADDSIGNED */
	 R200_ALPHA_ARG( 0, A );
	 R200_ALPHA_ARG( 1, C );
	 R200_ALPHA_ARG( 2, B );
	 break;
      case GL_MODULATE_SUBTRACT_ATI:
	 alpha_combine = (R200_TXA_NEG_ARG_C |
			  R200_TXA_OP_MADD);
	 R200_ALPHA_ARG( 0, A );
	 R200_ALPHA_ARG( 1, C );
	 R200_ALPHA_ARG( 2, B );
	 break;
      default:
	 return GL_FALSE;
      }

      if ( (texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA_EXT)
	   || (texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA) ) {
	 alpha_scale |= R200_TXA_DOT_ALPHA;
	 Ashift = RGBshift;
      }

      /* Step 3:
       * Apply the scale factor.
       */
      color_scale |= (RGBshift << R200_TXC_SCALE_SHIFT);
      alpha_scale |= (Ashift   << R200_TXA_SCALE_SHIFT);

      /* All done!
       */
   }

   if ( rmesa->hw.pix[slot].cmd[PIX_PP_TXCBLEND] != color_combine ||
	rmesa->hw.pix[slot].cmd[PIX_PP_TXABLEND] != alpha_combine ||
	rmesa->hw.pix[slot].cmd[PIX_PP_TXCBLEND2] != color_scale ||
	rmesa->hw.pix[slot].cmd[PIX_PP_TXABLEND2] != alpha_scale) {
      R200_STATECHANGE( rmesa, pix[slot] );
      rmesa->hw.pix[slot].cmd[PIX_PP_TXCBLEND] = color_combine;
      rmesa->hw.pix[slot].cmd[PIX_PP_TXABLEND] = alpha_combine;
      rmesa->hw.pix[slot].cmd[PIX_PP_TXCBLEND2] = color_scale;
      rmesa->hw.pix[slot].cmd[PIX_PP_TXABLEND2] = alpha_scale;
   }

   return GL_TRUE;
}

#define REF_COLOR 1
#define REF_ALPHA 2

static GLboolean r200UpdateAllTexEnv( GLcontext *ctx )
{
   r200ContextPtr rmesa = R200_CONTEXT(ctx);
   GLint i, j, currslot;
   GLint maxunitused = -1;
   GLboolean texregfree[6] = {GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE};
   GLubyte stageref[7] = {0, 0, 0, 0, 0, 0, 0};
   GLint nextunit[R200_MAX_TEXTURE_UNITS] = {0, 0, 0, 0, 0, 0};
   GLint currentnext = -1;
   GLboolean ok;

   /* find highest used unit */
   for ( j = 0; j < R200_MAX_TEXTURE_UNITS; j++) {
      if (ctx->Texture.Unit[j]._ReallyEnabled) {
	 maxunitused = j;
      }
   }
   stageref[maxunitused + 1] = REF_COLOR | REF_ALPHA;

   for ( j = maxunitused; j >= 0; j-- ) {
      const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[j];

      rmesa->state.texture.unit[j].outputreg = -1;

      if (stageref[j + 1]) {

	 /* use the lowest available reg. That gets us automatically reg0 for the last stage.
	    need this even for disabled units, as it may get referenced due to the replace
	    optimization */
	 for ( i = 0 ; i < R200_MAX_TEXTURE_UNITS; i++ ) {
	    if (texregfree[i]) {
	       rmesa->state.texture.unit[j].outputreg = i;
	       break;
	    }
	 }
	 if (rmesa->state.texture.unit[j].outputreg == -1) {
	    /* no more free regs we can use. Need a fallback :-( */
	    return GL_FALSE;
         }

         nextunit[j] = currentnext;

         if (!texUnit->_ReallyEnabled) {
	 /* the not enabled stages are referenced "indirectly",
            must not cut off the lower stages */
	    stageref[j] = REF_COLOR | REF_ALPHA;
	    continue;
         }
	 currentnext = j;
 
	 const GLuint numColorArgs = texUnit->_CurrentCombine->_NumArgsRGB;
	 const GLuint numAlphaArgs = texUnit->_CurrentCombine->_NumArgsA;
	 const GLboolean isdot3rgba = (texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA) ||
				      (texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA_EXT);


	 /* check if we need the color part, special case for dot3_rgba
	    as if only the alpha part is referenced later on it still is using the color part */
	 if ((stageref[j + 1] & REF_COLOR) || isdot3rgba) {
	    for ( i = 0 ; i < numColorArgs ; i++ ) {
	       const GLuint srcRGBi = texUnit->_CurrentCombine->SourceRGB[i];
	       const GLuint op = texUnit->_CurrentCombine->OperandRGB[i];
	       switch ( srcRGBi ) {
	       case GL_PREVIOUS:
		  /* op 0/1 are referencing color, op 2/3 alpha */
		  stageref[j] |= (op >> 1) + 1;
	          break;
	       case GL_TEXTURE:
		  texregfree[j] = GL_FALSE;
		  break;
	       case GL_TEXTURE0:
	       case GL_TEXTURE1:
	       case GL_TEXTURE2:
	       case GL_TEXTURE3:
	       case GL_TEXTURE4:
	       case GL_TEXTURE5:
		  texregfree[srcRGBi - GL_TEXTURE0] = GL_FALSE;
	          break;
	       default: /* don't care about other sources here */
		  break;
	       }
	    }
	 }

	 /* alpha args are ignored for dot3_rgba */
	 if ((stageref[j + 1] & REF_ALPHA) && !isdot3rgba) {

	    for ( i = 0 ; i < numAlphaArgs ; i++ ) {
	       const GLuint srcAi = texUnit->_CurrentCombine->SourceA[i];
	       switch ( srcAi ) {
	       case GL_PREVIOUS:
		  stageref[j] |= REF_ALPHA;
		  break;
	       case GL_TEXTURE:
		  texregfree[j] = GL_FALSE;
		  break;
	       case GL_TEXTURE0:
	       case GL_TEXTURE1:
	       case GL_TEXTURE2:
	       case GL_TEXTURE3:
	       case GL_TEXTURE4:
	       case GL_TEXTURE5:
		  texregfree[srcAi - GL_TEXTURE0] = GL_FALSE;
		  break;
	       default: /* don't care about other sources here */
		  break;
	       }
	    }
	 }
      }
   }

   /* don't enable texture sampling for units if the result is not used */
   for (i = 0; i < R200_MAX_TEXTURE_UNITS; i++) {
      if (ctx->Texture.Unit[i]._ReallyEnabled && !texregfree[i])
	 rmesa->state.texture.unit[i].unitneeded = ctx->Texture.Unit[i]._ReallyEnabled;
      else rmesa->state.texture.unit[i].unitneeded = 0;
   }

   ok = GL_TRUE;
   currslot = 0;
   rmesa->state.envneeded = 1;

   i = 0;
   while ((i <= maxunitused) && (i >= 0)) {
      /* only output instruction if the results are referenced */
      if (ctx->Texture.Unit[i]._ReallyEnabled && stageref[i+1]) {
         GLuint replaceunit = i;
	 /* try to optimize GL_REPLACE away (only one level deep though) */
	 if (	(ctx->Texture.Unit[i]._CurrentCombine->ModeRGB == GL_REPLACE) &&
		(ctx->Texture.Unit[i]._CurrentCombine->ModeA == GL_REPLACE) &&
		(ctx->Texture.Unit[i]._CurrentCombine->ScaleShiftRGB == 0) &&
		(ctx->Texture.Unit[i]._CurrentCombine->ScaleShiftA == 0) &&
		(nextunit[i] > 0) ) {
	    /* yippie! can optimize it away! */
	    replaceunit = i;
	    i = nextunit[i];
	 }

	 /* need env instruction slot */
	 rmesa->state.envneeded |= 1 << currslot;
	 ok = r200UpdateTextureEnv( ctx, i, currslot, replaceunit );
	 if (!ok) return GL_FALSE;
	 currslot++;
      }
      i = i + 1;
   }

   if (currslot == 0) {
      /* need one stage at least */
      rmesa->state.texture.unit[0].outputreg = 0;
      ok = r200UpdateTextureEnv( ctx, 0, 0, 0 );
   }

   R200_STATECHANGE( rmesa, ctx );
   rmesa->hw.ctx.cmd[CTX_PP_CNTL] &= ~(R200_TEX_BLEND_ENABLE_MASK | R200_MULTI_PASS_ENABLE);
   rmesa->hw.ctx.cmd[CTX_PP_CNTL] |= rmesa->state.envneeded << R200_TEX_BLEND_0_ENABLE_SHIFT;

   return ok;
}

#undef REF_COLOR
#undef REF_ALPHA


#define TEXOBJ_TXFILTER_MASK (R200_MAX_MIP_LEVEL_MASK |		\
			      R200_MIN_FILTER_MASK | 		\
			      R200_MAG_FILTER_MASK |		\
			      R200_MAX_ANISO_MASK |		\
			      R200_YUV_TO_RGB |			\
			      R200_YUV_TEMPERATURE_MASK |	\
			      R200_CLAMP_S_MASK | 		\
			      R200_CLAMP_T_MASK | 		\
			      R200_BORDER_MODE_D3D )

#define TEXOBJ_TXFORMAT_MASK (R200_TXFORMAT_WIDTH_MASK |	\
			      R200_TXFORMAT_HEIGHT_MASK |	\
			      R200_TXFORMAT_FORMAT_MASK |	\
			      R200_TXFORMAT_F5_WIDTH_MASK |	\
			      R200_TXFORMAT_F5_HEIGHT_MASK |	\
			      R200_TXFORMAT_ALPHA_IN_MAP |	\
			      R200_TXFORMAT_CUBIC_MAP_ENABLE |	\
			      R200_TXFORMAT_NON_POWER2)

#define TEXOBJ_TXFORMAT_X_MASK (R200_DEPTH_LOG2_MASK |		\
                                R200_TEXCOORD_MASK |		\
                                R200_CLAMP_Q_MASK | 		\
                                R200_VOLUME_FILTER_MASK)


static void import_tex_obj_state( r200ContextPtr rmesa,
				  int unit,
				  r200TexObjPtr texobj )
{
   GLuint *cmd = R200_DB_STATE( tex[unit] );

   cmd[TEX_PP_TXFILTER] &= ~TEXOBJ_TXFILTER_MASK;
   cmd[TEX_PP_TXFILTER] |= texobj->pp_txfilter & TEXOBJ_TXFILTER_MASK;
   cmd[TEX_PP_TXFORMAT] &= ~TEXOBJ_TXFORMAT_MASK;
   cmd[TEX_PP_TXFORMAT] |= texobj->pp_txformat & TEXOBJ_TXFORMAT_MASK;
   cmd[TEX_PP_TXFORMAT_X] &= ~TEXOBJ_TXFORMAT_X_MASK;
   cmd[TEX_PP_TXFORMAT_X] |= texobj->pp_txformat_x & TEXOBJ_TXFORMAT_X_MASK;
   cmd[TEX_PP_TXSIZE] = texobj->pp_txsize; /* NPOT only! */
   cmd[TEX_PP_TXPITCH] = texobj->pp_txpitch; /* NPOT only! */
   cmd[TEX_PP_BORDER_COLOR] = texobj->pp_border_color;
   if (rmesa->r200Screen->drmSupportsFragShader) {
      cmd[TEX_PP_TXOFFSET_NEWDRM] = texobj->pp_txoffset;
   }
   else {
      cmd[TEX_PP_TXOFFSET_OLDDRM] = texobj->pp_txoffset;
   }

   if (texobj->base.tObj->Target == GL_TEXTURE_CUBE_MAP) {
      GLuint *cube_cmd = R200_DB_STATE( cube[unit] );
      GLuint bytesPerFace = texobj->base.totalSize / 6;
      ASSERT(texobj->base.totalSize % 6 == 0);
      cube_cmd[CUBE_PP_CUBIC_FACES] = texobj->pp_cubic_faces;
      if (rmesa->r200Screen->drmSupportsFragShader) {
	 /* that value is submitted twice. could change cube atom
	    to not include that command when new drm is used */
	 cmd[TEX_PP_CUBIC_FACES] = texobj->pp_cubic_faces;
      }
      cube_cmd[CUBE_PP_CUBIC_OFFSET_F1] = texobj->pp_txoffset + 1 * bytesPerFace;
      cube_cmd[CUBE_PP_CUBIC_OFFSET_F2] = texobj->pp_txoffset + 2 * bytesPerFace;
      cube_cmd[CUBE_PP_CUBIC_OFFSET_F3] = texobj->pp_txoffset + 3 * bytesPerFace;
      cube_cmd[CUBE_PP_CUBIC_OFFSET_F4] = texobj->pp_txoffset + 4 * bytesPerFace;
      cube_cmd[CUBE_PP_CUBIC_OFFSET_F5] = texobj->pp_txoffset + 5 * bytesPerFace;
      R200_DB_STATECHANGE( rmesa, &rmesa->hw.cube[unit] );
   }
   R200_DB_STATECHANGE( rmesa, &rmesa->hw.tex[unit] );

   texobj->dirty_state &= ~(1<<unit);
}


static void set_texgen_matrix( r200ContextPtr rmesa, 
			       GLuint unit,
			       const GLfloat *s_plane,
			       const GLfloat *t_plane,
			       const GLfloat *r_plane,
			       const GLfloat *q_plane )
{
   GLfloat m[16];

   m[0]  = s_plane[0];
   m[4]  = s_plane[1];
   m[8]  = s_plane[2];
   m[12] = s_plane[3];

   m[1]  = t_plane[0];
   m[5]  = t_plane[1];
   m[9]  = t_plane[2];
   m[13] = t_plane[3];

   m[2]  = r_plane[0];
   m[6]  = r_plane[1];
   m[10] = r_plane[2];
   m[14] = r_plane[3];

   m[3]  = q_plane[0];
   m[7]  = q_plane[1];
   m[11] = q_plane[2];
   m[15] = q_plane[3];

   _math_matrix_loadf( &(rmesa->TexGenMatrix[unit]), m);
   _math_matrix_analyse( &(rmesa->TexGenMatrix[unit]) );
   rmesa->TexGenEnabled |= R200_TEXMAT_0_ENABLE<<unit;
}


/*
 * Returns GL_FALSE if fallback required.  
 */
static GLboolean r200_validate_texgen( GLcontext *ctx, GLuint unit )
{  
   r200ContextPtr rmesa = R200_CONTEXT(ctx);
   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
   GLuint inputshift = R200_TEXGEN_0_INPUT_SHIFT + unit*4;
   GLuint tgi, tgcm;
   GLuint mode = 0;
   GLboolean mixed_fallback = GL_FALSE;
   static const GLfloat I[16] = {
      1,  0,  0,  0,
      0,  1,  0,  0,
      0,  0,  1,  0,
      0,  0,  0,  1 };
   static const GLfloat reflect[16] = {
      -1,  0,  0,  0,
       0, -1,  0,  0,
       0,  0,  -1, 0,
       0,  0,  0,  1 };

   rmesa->TexGenCompSel &= ~(R200_OUTPUT_TEX_0 << unit);
   rmesa->TexGenEnabled &= ~(R200_TEXGEN_TEXMAT_0_ENABLE<<unit);
   rmesa->TexGenEnabled &= ~(R200_TEXMAT_0_ENABLE<<unit);
   rmesa->TexGenNeedNormals[unit] = GL_FALSE;
   tgi = rmesa->hw.tcg.cmd[TCG_TEX_PROC_CTL_1] & ~(R200_TEXGEN_INPUT_MASK <<
						   inputshift);
   tgcm = rmesa->hw.tcg.cmd[TCG_TEX_PROC_CTL_2] & ~(R200_TEXGEN_COMP_MASK <<
						    (unit * 4));

   if (0) 
      fprintf(stderr, "%s unit %d\n", __FUNCTION__, unit);

   if (texUnit->TexGenEnabled & S_BIT) {
      mode = texUnit->GenModeS;
   } else {
      tgcm |= R200_TEXGEN_COMP_S << (unit * 4);
   }

   if (texUnit->TexGenEnabled & T_BIT) {
      if (texUnit->GenModeT != mode)
	 mixed_fallback = GL_TRUE;
   } else {
      tgcm |= R200_TEXGEN_COMP_T << (unit * 4);
   }

   if (texUnit->TexGenEnabled & R_BIT) {
      if (texUnit->GenModeR != mode)
	 mixed_fallback = GL_TRUE;
   } else {
      tgcm |= R200_TEXGEN_COMP_R << (unit * 4);
   }

   if (texUnit->TexGenEnabled & Q_BIT) {
      if (texUnit->GenModeQ != mode)
	 mixed_fallback = GL_TRUE;
   } else {
      tgcm |= R200_TEXGEN_COMP_Q << (unit * 4);
   }

   if (mixed_fallback) {
      if (R200_DEBUG & DEBUG_FALLBACKS)
	 fprintf(stderr, "fallback mixed texgen, 0x%x (0x%x 0x%x 0x%x 0x%x)\n",
		 texUnit->TexGenEnabled, texUnit->GenModeS, texUnit->GenModeT,
		 texUnit->GenModeR, texUnit->GenModeQ);
      return GL_FALSE;
   }

   switch (mode) {
   case GL_OBJECT_LINEAR:
      tgi |= R200_TEXGEN_INPUT_OBJ << inputshift;
      set_texgen_matrix( rmesa, unit, 
	 (texUnit->TexGenEnabled & S_BIT) ? texUnit->ObjectPlaneS : I,
	 (texUnit->TexGenEnabled & T_BIT) ? texUnit->ObjectPlaneT : I + 4,
	 (texUnit->TexGenEnabled & R_BIT) ? texUnit->ObjectPlaneR : I + 8,
	 (texUnit->TexGenEnabled & Q_BIT) ? texUnit->ObjectPlaneQ : I + 12);
      break;

   case GL_EYE_LINEAR:
      tgi |= R200_TEXGEN_INPUT_EYE << inputshift;
      set_texgen_matrix( rmesa, unit, 
	 (texUnit->TexGenEnabled & S_BIT) ? texUnit->EyePlaneS : I,
	 (texUnit->TexGenEnabled & T_BIT) ? texUnit->EyePlaneT : I + 4,
	 (texUnit->TexGenEnabled & R_BIT) ? texUnit->EyePlaneR : I + 8,
	 (texUnit->TexGenEnabled & Q_BIT) ? texUnit->EyePlaneQ : I + 12);
      break;

   case GL_REFLECTION_MAP_NV:
      rmesa->TexGenNeedNormals[unit] = GL_TRUE;
      tgi |= R200_TEXGEN_INPUT_EYE_REFLECT<<inputshift;
      set_texgen_matrix( rmesa, unit, 
	 (texUnit->TexGenEnabled & S_BIT) ? reflect : I,
	 (texUnit->TexGenEnabled & T_BIT) ? reflect + 4 : I + 4,
	 (texUnit->TexGenEnabled & R_BIT) ? reflect + 8 : I + 8,
	 I + 12);
      break;

   case GL_NORMAL_MAP_NV:
      rmesa->TexGenNeedNormals[unit] = GL_TRUE;
      tgi |= R200_TEXGEN_INPUT_EYE_NORMAL<<inputshift;
      break;

   case GL_SPHERE_MAP:
      rmesa->TexGenNeedNormals[unit] = GL_TRUE;
      tgi |= R200_TEXGEN_INPUT_SPHERE<<inputshift;
      break;

   case 0:
      /* All texgen units were disabled, so just pass coords through. */
      tgi |= unit << inputshift;
      break;

   default:
      /* Unsupported mode, fallback:
       */
      if (R200_DEBUG & DEBUG_FALLBACKS)
	 fprintf(stderr, "fallback unsupported texgen, %d\n",
		 texUnit->GenModeS);
      return GL_FALSE;
   }

   rmesa->TexGenEnabled |= R200_TEXGEN_TEXMAT_0_ENABLE << unit;
   rmesa->TexGenCompSel |= R200_OUTPUT_TEX_0 << unit;

   if (tgi != rmesa->hw.tcg.cmd[TCG_TEX_PROC_CTL_1] ||