コード例 #1
0
ファイル: st_program.c プロジェクト: ashmew2/kolibriosSVN
/**
 * Translate a Mesa fragment shader into a TGSI shader using extra info in
 * the key.
 * \return  new fragment program variant
 */
static struct st_fp_variant *
st_translate_fragment_program(struct st_context *st,
                              struct st_fragment_program *stfp,
                              const struct st_fp_variant_key *key)
{
   struct pipe_context *pipe = st->pipe;
   struct st_fp_variant *variant = CALLOC_STRUCT(st_fp_variant);
   GLboolean deleteFP = GL_FALSE;

   GLuint outputMapping[FRAG_RESULT_MAX];
   GLuint inputMapping[VARYING_SLOT_MAX];
   GLuint interpMode[PIPE_MAX_SHADER_INPUTS];  /* XXX size? */
   GLuint interpLocation[PIPE_MAX_SHADER_INPUTS];
   GLuint attr;
   GLbitfield64 inputsRead;
   struct ureg_program *ureg;

   GLboolean write_all = GL_FALSE;

   ubyte input_semantic_name[PIPE_MAX_SHADER_INPUTS];
   ubyte input_semantic_index[PIPE_MAX_SHADER_INPUTS];
   uint fs_num_inputs = 0;

   ubyte fs_output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
   ubyte fs_output_semantic_index[PIPE_MAX_SHADER_OUTPUTS];
   uint fs_num_outputs = 0;

   if (!variant)
      return NULL;

   assert(!(key->bitmap && key->drawpixels));

   if (key->bitmap) {
      /* glBitmap drawing */
      struct gl_fragment_program *fp; /* we free this temp program below */

      st_make_bitmap_fragment_program(st, &stfp->Base,
                                      &fp, &variant->bitmap_sampler);

      variant->parameters = _mesa_clone_parameter_list(fp->Base.Parameters);
      stfp = st_fragment_program(fp);
      deleteFP = GL_TRUE;
   }
   else if (key->drawpixels) {
      /* glDrawPixels drawing */
      struct gl_fragment_program *fp; /* we free this temp program below */

      if (key->drawpixels_z || key->drawpixels_stencil) {
         fp = st_make_drawpix_z_stencil_program(st, key->drawpixels_z,
                                                key->drawpixels_stencil);
      }
      else {
         /* RGBA */
         st_make_drawpix_fragment_program(st, &stfp->Base, &fp);
         variant->parameters = _mesa_clone_parameter_list(fp->Base.Parameters);
         deleteFP = GL_TRUE;
      }
      stfp = st_fragment_program(fp);
   }

   if (!stfp->glsl_to_tgsi)
      _mesa_remove_output_reads(&stfp->Base.Base, PROGRAM_OUTPUT);

   /*
    * Convert Mesa program inputs to TGSI input register semantics.
    */
   inputsRead = stfp->Base.Base.InputsRead;
   for (attr = 0; attr < VARYING_SLOT_MAX; attr++) {
      if ((inputsRead & BITFIELD64_BIT(attr)) != 0) {
         const GLuint slot = fs_num_inputs++;

         inputMapping[attr] = slot;
         if (stfp->Base.IsCentroid & BITFIELD64_BIT(attr))
            interpLocation[slot] = TGSI_INTERPOLATE_LOC_CENTROID;
         else if (stfp->Base.IsSample & BITFIELD64_BIT(attr))
            interpLocation[slot] = TGSI_INTERPOLATE_LOC_SAMPLE;
         else
            interpLocation[slot] = TGSI_INTERPOLATE_LOC_CENTER;

         if (key->persample_shading)
            interpLocation[slot] = TGSI_INTERPOLATE_LOC_SAMPLE;

         switch (attr) {
         case VARYING_SLOT_POS:
            input_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
            input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
            break;
         case VARYING_SLOT_COL0:
            input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
            input_semantic_index[slot] = 0;
            interpMode[slot] = st_translate_interp(stfp->Base.InterpQualifier[attr],
                                                   TRUE);
            break;
         case VARYING_SLOT_COL1:
            input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
            input_semantic_index[slot] = 1;
            interpMode[slot] = st_translate_interp(stfp->Base.InterpQualifier[attr],
                                                   TRUE);
            break;
         case VARYING_SLOT_FOGC:
            input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
            input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
            break;
         case VARYING_SLOT_FACE:
            input_semantic_name[slot] = TGSI_SEMANTIC_FACE;
            input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
            break;
         case VARYING_SLOT_PRIMITIVE_ID:
            input_semantic_name[slot] = TGSI_SEMANTIC_PRIMID;
            input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
            break;
         case VARYING_SLOT_LAYER:
            input_semantic_name[slot] = TGSI_SEMANTIC_LAYER;
            input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
            break;
         case VARYING_SLOT_VIEWPORT:
            input_semantic_name[slot] = TGSI_SEMANTIC_VIEWPORT_INDEX;
            input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
            break;
         case VARYING_SLOT_CLIP_DIST0:
            input_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
            input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
            break;
         case VARYING_SLOT_CLIP_DIST1:
            input_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
            input_semantic_index[slot] = 1;
            interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
            break;
            /* In most cases, there is nothing special about these
             * inputs, so adopt a convention to use the generic
             * semantic name and the mesa VARYING_SLOT_ number as the
             * index.
             *
             * All that is required is that the vertex shader labels
             * its own outputs similarly, and that the vertex shader
             * generates at least every output required by the
             * fragment shader plus fixed-function hardware (such as
             * BFC).
             *
             * However, some drivers may need us to identify the PNTC and TEXi
             * varyings if, for example, their capability to replace them with
             * sprite coordinates is limited.
             */
         case VARYING_SLOT_PNTC:
            if (st->needs_texcoord_semantic) {
               input_semantic_name[slot] = TGSI_SEMANTIC_PCOORD;
               input_semantic_index[slot] = 0;
               interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
               break;
            }
            /* fall through */
         case VARYING_SLOT_TEX0:
         case VARYING_SLOT_TEX1:
         case VARYING_SLOT_TEX2:
         case VARYING_SLOT_TEX3:
         case VARYING_SLOT_TEX4:
         case VARYING_SLOT_TEX5:
         case VARYING_SLOT_TEX6:
         case VARYING_SLOT_TEX7:
            if (st->needs_texcoord_semantic) {
               input_semantic_name[slot] = TGSI_SEMANTIC_TEXCOORD;
               input_semantic_index[slot] = attr - VARYING_SLOT_TEX0;
               interpMode[slot] =
                  st_translate_interp(stfp->Base.InterpQualifier[attr], FALSE);
               break;
            }
            /* fall through */
         case VARYING_SLOT_VAR0:
         default:
            /* Semantic indices should be zero-based because drivers may choose
             * to assign a fixed slot determined by that index.
             * This is useful because ARB_separate_shader_objects uses location
             * qualifiers for linkage, and if the semantic index corresponds to
             * these locations, linkage passes in the driver become unecessary.
             *
             * If needs_texcoord_semantic is true, no semantic indices will be
             * consumed for the TEXi varyings, and we can base the locations of
             * the user varyings on VAR0.  Otherwise, we use TEX0 as base index.
             */
            assert(attr >= VARYING_SLOT_TEX0);
            input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
            input_semantic_index[slot] = st_get_generic_varying_index(st, attr);
            if (attr == VARYING_SLOT_PNTC)
               interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
            else
               interpMode[slot] = st_translate_interp(stfp->Base.InterpQualifier[attr],
                                                      FALSE);
            break;
         }
      }
      else {
         inputMapping[attr] = -1;
      }
   }

   /*
    * Semantics and mapping for outputs
    */
   {
      uint numColors = 0;
      GLbitfield64 outputsWritten = stfp->Base.Base.OutputsWritten;

      /* if z is written, emit that first */
      if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
         fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_POSITION;
         fs_output_semantic_index[fs_num_outputs] = 0;
         outputMapping[FRAG_RESULT_DEPTH] = fs_num_outputs;
         fs_num_outputs++;
         outputsWritten &= ~(1 << FRAG_RESULT_DEPTH);
      }

      if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_STENCIL)) {
         fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_STENCIL;
         fs_output_semantic_index[fs_num_outputs] = 0;
         outputMapping[FRAG_RESULT_STENCIL] = fs_num_outputs;
         fs_num_outputs++;
         outputsWritten &= ~(1 << FRAG_RESULT_STENCIL);
      }

      if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_SAMPLE_MASK)) {
         fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_SAMPLEMASK;
         fs_output_semantic_index[fs_num_outputs] = 0;
         outputMapping[FRAG_RESULT_SAMPLE_MASK] = fs_num_outputs;
         fs_num_outputs++;
         outputsWritten &= ~(1 << FRAG_RESULT_SAMPLE_MASK);
      }

      /* handle remaining outputs (color) */
      for (attr = 0; attr < FRAG_RESULT_MAX; attr++) {
         if (outputsWritten & BITFIELD64_BIT(attr)) {
            switch (attr) {
            case FRAG_RESULT_DEPTH:
            case FRAG_RESULT_STENCIL:
            case FRAG_RESULT_SAMPLE_MASK:
               /* handled above */
               assert(0);
               break;
            case FRAG_RESULT_COLOR:
               write_all = GL_TRUE; /* fallthrough */
            default:
               assert(attr == FRAG_RESULT_COLOR ||
                      (FRAG_RESULT_DATA0 <= attr && attr < FRAG_RESULT_MAX));
               fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_COLOR;
               fs_output_semantic_index[fs_num_outputs] = numColors;
               outputMapping[attr] = fs_num_outputs;
               numColors++;
               break;
            }

            fs_num_outputs++;
         }
      }
   }

   ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
   if (ureg == NULL) {
      free(variant);
      return NULL;
   }

   if (ST_DEBUG & DEBUG_MESA) {
      _mesa_print_program(&stfp->Base.Base);
      _mesa_print_program_parameters(st->ctx, &stfp->Base.Base);
      debug_printf("\n");
   }
   if (write_all == GL_TRUE)
      ureg_property(ureg, TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS, 1);

   if (stfp->Base.FragDepthLayout != FRAG_DEPTH_LAYOUT_NONE) {
      switch (stfp->Base.FragDepthLayout) {
      case FRAG_DEPTH_LAYOUT_ANY:
         ureg_property(ureg, TGSI_PROPERTY_FS_DEPTH_LAYOUT,
                       TGSI_FS_DEPTH_LAYOUT_ANY);
         break;
      case FRAG_DEPTH_LAYOUT_GREATER:
         ureg_property(ureg, TGSI_PROPERTY_FS_DEPTH_LAYOUT,
                       TGSI_FS_DEPTH_LAYOUT_GREATER);
         break;
      case FRAG_DEPTH_LAYOUT_LESS:
         ureg_property(ureg, TGSI_PROPERTY_FS_DEPTH_LAYOUT,
                       TGSI_FS_DEPTH_LAYOUT_LESS);
         break;
      case FRAG_DEPTH_LAYOUT_UNCHANGED:
         ureg_property(ureg, TGSI_PROPERTY_FS_DEPTH_LAYOUT,
                       TGSI_FS_DEPTH_LAYOUT_UNCHANGED);
         break;
      default:
         assert(0);
      }
   }

   if (stfp->glsl_to_tgsi)
      st_translate_program(st->ctx,
                           TGSI_PROCESSOR_FRAGMENT,
                           ureg,
                           stfp->glsl_to_tgsi,
                           &stfp->Base.Base,
                           /* inputs */
                           fs_num_inputs,
                           inputMapping,
                           input_semantic_name,
                           input_semantic_index,
                           interpMode,
                           interpLocation,
                           /* outputs */
                           fs_num_outputs,
                           outputMapping,
                           fs_output_semantic_name,
                           fs_output_semantic_index, FALSE,
                           key->clamp_color );
   else
      st_translate_mesa_program(st->ctx,
                                TGSI_PROCESSOR_FRAGMENT,
                                ureg,
                                &stfp->Base.Base,
                                /* inputs */
                                fs_num_inputs,
                                inputMapping,
                                input_semantic_name,
                                input_semantic_index,
                                interpMode,
                                /* outputs */
                                fs_num_outputs,
                                outputMapping,
                                fs_output_semantic_name,
                                fs_output_semantic_index, FALSE,
                                key->clamp_color);

   variant->tgsi.tokens = ureg_get_tokens( ureg, NULL );
   ureg_destroy( ureg );

   if (ST_DEBUG & DEBUG_TGSI) {
      tgsi_dump(variant->tgsi.tokens, 0/*TGSI_DUMP_VERBOSE*/);
      debug_printf("\n");
   }

   /* fill in variant */
   variant->driver_shader = pipe->create_fs_state(pipe, &variant->tgsi);
   variant->key = *key;

   if (deleteFP) {
      /* Free the temporary program made above */
      struct gl_fragment_program *fp = &stfp->Base;
      _mesa_reference_fragprog(st->ctx, &fp, NULL);
   }

   return variant;
}
コード例 #2
0
/**
 * Translate a Mesa fragment shader into a TGSI shader using extra info in
 * the key.
 * \return  new fragment program variant
 */
static struct st_fp_variant *
st_translate_fragment_program(struct st_context *st,
                              struct st_fragment_program *stfp,
                              const struct st_fp_variant_key *key)
{
   struct pipe_context *pipe = st->pipe;
   struct st_fp_variant *variant = CALLOC_STRUCT(st_fp_variant);
   GLboolean deleteFP = GL_FALSE;

   GLuint outputMapping[FRAG_RESULT_MAX];
   GLuint inputMapping[VARYING_SLOT_MAX];
   GLuint interpMode[PIPE_MAX_SHADER_INPUTS];  /* XXX size? */
   GLuint attr;
   GLbitfield64 inputsRead;
   struct ureg_program *ureg;

   GLboolean write_all = GL_FALSE;

   ubyte input_semantic_name[PIPE_MAX_SHADER_INPUTS];
   ubyte input_semantic_index[PIPE_MAX_SHADER_INPUTS];
   GLboolean is_centroid[PIPE_MAX_SHADER_INPUTS];
   uint fs_num_inputs = 0;

   ubyte fs_output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
   ubyte fs_output_semantic_index[PIPE_MAX_SHADER_OUTPUTS];
   uint fs_num_outputs = 0;

   if (!variant)
      return NULL;

   assert(!(key->bitmap && key->drawpixels));

   if (key->bitmap) {
      /* glBitmap drawing */
      struct gl_fragment_program *fp; /* we free this temp program below */

      st_make_bitmap_fragment_program(st, &stfp->Base,
                                      &fp, &variant->bitmap_sampler);

      variant->parameters = _mesa_clone_parameter_list(fp->Base.Parameters);
      stfp = st_fragment_program(fp);
      deleteFP = GL_TRUE;
   }
   else if (key->drawpixels) {
      /* glDrawPixels drawing */
      struct gl_fragment_program *fp; /* we free this temp program below */

      if (key->drawpixels_z || key->drawpixels_stencil) {
         fp = st_make_drawpix_z_stencil_program(st, key->drawpixels_z,
                                                key->drawpixels_stencil);
      }
      else {
         /* RGBA */
         st_make_drawpix_fragment_program(st, &stfp->Base, &fp);
         variant->parameters = _mesa_clone_parameter_list(fp->Base.Parameters);
         deleteFP = GL_TRUE;
      }
      stfp = st_fragment_program(fp);
   }

   if (!stfp->glsl_to_tgsi)
      _mesa_remove_output_reads(&stfp->Base.Base, PROGRAM_OUTPUT);

   /*
    * Convert Mesa program inputs to TGSI input register semantics.
    */
   inputsRead = stfp->Base.Base.InputsRead;
   for (attr = 0; attr < VARYING_SLOT_MAX; attr++) {
      if ((inputsRead & BITFIELD64_BIT(attr)) != 0) {
         const GLuint slot = fs_num_inputs++;

         inputMapping[attr] = slot;
         is_centroid[slot] = (stfp->Base.IsCentroid & BITFIELD64_BIT(attr)) != 0;

         switch (attr) {
         case VARYING_SLOT_POS:
            input_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
            input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
            break;
         case VARYING_SLOT_COL0:
            input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
            input_semantic_index[slot] = 0;
            interpMode[slot] = st_translate_interp(stfp->Base.InterpQualifier[attr],
                                                   TRUE);
            break;
         case VARYING_SLOT_COL1:
            input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
            input_semantic_index[slot] = 1;
            interpMode[slot] = st_translate_interp(stfp->Base.InterpQualifier[attr],
                                                   TRUE);
            break;
         case VARYING_SLOT_FOGC:
            input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
            input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
            break;
         case VARYING_SLOT_FACE:
            input_semantic_name[slot] = TGSI_SEMANTIC_FACE;
            input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
            break;
         case VARYING_SLOT_CLIP_DIST0:
            input_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
            input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
            break;
         case VARYING_SLOT_CLIP_DIST1:
            input_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
            input_semantic_index[slot] = 1;
            interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
            break;
            /* In most cases, there is nothing special about these
             * inputs, so adopt a convention to use the generic
             * semantic name and the mesa VARYING_SLOT_ number as the
             * index.
             *
             * All that is required is that the vertex shader labels
             * its own outputs similarly, and that the vertex shader
             * generates at least every output required by the
             * fragment shader plus fixed-function hardware (such as
             * BFC).
             *
             * There is no requirement that semantic indexes start at
             * zero or be restricted to a particular range -- nobody
             * should be building tables based on semantic index.
             */
         case VARYING_SLOT_PNTC:
         case VARYING_SLOT_TEX0:
         case VARYING_SLOT_TEX1:
         case VARYING_SLOT_TEX2:
         case VARYING_SLOT_TEX3:
         case VARYING_SLOT_TEX4:
         case VARYING_SLOT_TEX5:
         case VARYING_SLOT_TEX6:
         case VARYING_SLOT_TEX7:
         case VARYING_SLOT_VAR0:
         default:
            /* Actually, let's try and zero-base this just for
             * readability of the generated TGSI.
             */
            assert(attr >= VARYING_SLOT_TEX0);
            input_semantic_index[slot] = (attr - VARYING_SLOT_TEX0);
            input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
            if (attr == VARYING_SLOT_PNTC)
               interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
            else
               interpMode[slot] = st_translate_interp(stfp->Base.InterpQualifier[attr],
                                                      FALSE);
            break;
         }
      }
      else {
         inputMapping[attr] = -1;
      }
   }

   /*
    * Semantics and mapping for outputs
    */
   {
      uint numColors = 0;
      GLbitfield64 outputsWritten = stfp->Base.Base.OutputsWritten;

      /* if z is written, emit that first */
      if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
         fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_POSITION;
         fs_output_semantic_index[fs_num_outputs] = 0;
         outputMapping[FRAG_RESULT_DEPTH] = fs_num_outputs;
         fs_num_outputs++;
         outputsWritten &= ~(1 << FRAG_RESULT_DEPTH);
      }

      if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_STENCIL)) {
         fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_STENCIL;
         fs_output_semantic_index[fs_num_outputs] = 0;
         outputMapping[FRAG_RESULT_STENCIL] = fs_num_outputs;
         fs_num_outputs++;
         outputsWritten &= ~(1 << FRAG_RESULT_STENCIL);
      }

      /* handle remaining outputs (color) */
      for (attr = 0; attr < FRAG_RESULT_MAX; attr++) {
         if (outputsWritten & BITFIELD64_BIT(attr)) {
            switch (attr) {
            case FRAG_RESULT_DEPTH:
            case FRAG_RESULT_STENCIL:
               /* handled above */
               assert(0);
               break;
            case FRAG_RESULT_COLOR:
               write_all = GL_TRUE; /* fallthrough */
            default:
               assert(attr == FRAG_RESULT_COLOR ||
                      (FRAG_RESULT_DATA0 <= attr && attr < FRAG_RESULT_MAX));
               fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_COLOR;
               fs_output_semantic_index[fs_num_outputs] = numColors;
               outputMapping[attr] = fs_num_outputs;
               numColors++;
               break;
            }

            fs_num_outputs++;
         }
      }
   }

   ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
   if (ureg == NULL) {
      free(variant);
      return NULL;
   }

   if (ST_DEBUG & DEBUG_MESA) {
      _mesa_print_program(&stfp->Base.Base);
      _mesa_print_program_parameters(st->ctx, &stfp->Base.Base);
      debug_printf("\n");
   }
   if (write_all == GL_TRUE)
      ureg_property_fs_color0_writes_all_cbufs(ureg, 1);

   if (stfp->Base.FragDepthLayout != FRAG_DEPTH_LAYOUT_NONE) {
      switch (stfp->Base.FragDepthLayout) {
      case FRAG_DEPTH_LAYOUT_ANY:
         ureg_property_fs_depth_layout(ureg, TGSI_FS_DEPTH_LAYOUT_ANY);
         break;
      case FRAG_DEPTH_LAYOUT_GREATER:
         ureg_property_fs_depth_layout(ureg, TGSI_FS_DEPTH_LAYOUT_GREATER);
         break;
      case FRAG_DEPTH_LAYOUT_LESS:
         ureg_property_fs_depth_layout(ureg, TGSI_FS_DEPTH_LAYOUT_LESS);
         break;
      case FRAG_DEPTH_LAYOUT_UNCHANGED:
         ureg_property_fs_depth_layout(ureg, TGSI_FS_DEPTH_LAYOUT_UNCHANGED);
         break;
      default:
         assert(0);
      }
   }

   if (stfp->glsl_to_tgsi)
      st_translate_program(st->ctx,
                           TGSI_PROCESSOR_FRAGMENT,
                           ureg,
                           stfp->glsl_to_tgsi,
                           &stfp->Base.Base,
                           /* inputs */
                           fs_num_inputs,
                           inputMapping,
                           input_semantic_name,
                           input_semantic_index,
                           interpMode,
                           is_centroid,
                           /* outputs */
                           fs_num_outputs,
                           outputMapping,
                           fs_output_semantic_name,
                           fs_output_semantic_index, FALSE,
                           key->clamp_color );
   else
      st_translate_mesa_program(st->ctx,
                                TGSI_PROCESSOR_FRAGMENT,
                                ureg,
                                &stfp->Base.Base,
                                /* inputs */
                                fs_num_inputs,
                                inputMapping,
                                input_semantic_name,
                                input_semantic_index,
                                interpMode,
                                /* outputs */
                                fs_num_outputs,
                                outputMapping,
                                fs_output_semantic_name,
                                fs_output_semantic_index, FALSE,
                                key->clamp_color);

   variant->tgsi.tokens = ureg_get_tokens( ureg, NULL );
   ureg_destroy( ureg );

   /* fill in variant */
   variant->driver_shader = pipe->create_fs_state(pipe, &variant->tgsi);
   variant->key = *key;

   if (ST_DEBUG & DEBUG_TGSI) {
      tgsi_dump( variant->tgsi.tokens, 0/*TGSI_DUMP_VERBOSE*/ );
      debug_printf("\n");
   }

   if (deleteFP) {
      /* Free the temporary program made above */
      struct gl_fragment_program *fp = &stfp->Base;
      _mesa_reference_fragprog(st->ctx, &fp, NULL);
   }

   return variant;
}