cell_state_derived.c File Reference

Include dependency graph for cell_state_derived.c:

Go to the source code of this file.

Functions
static void	calculate_vertex_layout (struct cell_context *cell)
	Determine how to map vertex program outputs to fragment program inputs.
void	cell_update_derived (struct cell_context *cell)
	Update derived state, send current state to SPUs prior to rendering.

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Function Documentation

static void calculate_vertex_layout

(

struct cell_context *

cell

)

[static]

Determine how to map vertex program outputs to fragment program inputs.

Basically, this will be used when computing the triangle interpolation coefficients from the post-transform vertex attributes.

Definition at line 44 of file cell_state_derived.c.

References assert, CELL_NEW_VERTEX_INFO, cell_context::dirty, cell_context::draw, draw_compute_vertex_size(), draw_emit_vertex_attr(), draw_find_vs_output(), EMIT_1F, EMIT_4F, pipe_rasterizer_state::flatshade, cell_context::fs, cell_fragment_shader_state::info, tgsi_shader_info::input_semantic_index, tgsi_shader_info::input_semantic_name, INTERP_CONSTANT, INTERP_LINEAR, INTERP_NONE, INTERP_PERSPECTIVE, INTERP_POS, vertex_info::num_attribs, tgsi_shader_info::num_inputs, cell_context::rasterizer, vertex_info::size, TGSI_SEMANTIC_COLOR, TGSI_SEMANTIC_FOG, TGSI_SEMANTIC_GENERIC, TGSI_SEMANTIC_POSITION, cell_context::vbuf, and cell_context::vertex_info.

{
   const struct cell_fragment_shader_state *fs = cell->fs;
   const enum interp_mode colorInterp
      = cell->rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
   struct vertex_info *vinfo = &cell->vertex_info;
   uint i;
   int src;

#if 0
   if (cell->vbuf) {
      /* if using the post-transform vertex buffer, tell draw_vbuf to
       * simply emit the whole post-xform vertex as-is:
       */
      struct vertex_info *vinfo_vbuf = &cell->vertex_info_vbuf;
      vinfo_vbuf->num_attribs = 0;
      draw_emit_vertex_attr(vinfo_vbuf, EMIT_ALL, INTERP_NONE, 0);
      vinfo_vbuf->size = 4 * vs->num_outputs + sizeof(struct vertex_header)/4;
   }
#endif

   /* reset vinfo */
   vinfo->num_attribs = 0;

   /* we always want to emit vertex pos */
   src = draw_find_vs_output(cell->draw, TGSI_SEMANTIC_POSITION, 0);
   assert(src >= 0);
   draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_POS, src);


   /*
    * Loop over fragment shader inputs, searching for the matching output
    * from the vertex shader.
    */
   for (i = 0; i < fs->info.num_inputs; i++) {
      switch (fs->info.input_semantic_name[i]) {
      case TGSI_SEMANTIC_POSITION:
         /* already done above */
         break;

      case TGSI_SEMANTIC_COLOR:
         src = draw_find_vs_output(cell->draw, TGSI_SEMANTIC_COLOR, 
                                   fs->info.input_semantic_index[i]);
         assert(src >= 0);
         draw_emit_vertex_attr(vinfo, EMIT_4F, colorInterp, src);
         break;

      case TGSI_SEMANTIC_FOG:
         src = draw_find_vs_output(cell->draw, TGSI_SEMANTIC_FOG, 0);
#if 1
         if (src < 0) /* XXX temp hack, try demos/fogcoord.c with this */
            src = 0;
#endif
         assert(src >= 0);
         draw_emit_vertex_attr(vinfo, EMIT_1F, INTERP_PERSPECTIVE, src);
         break;

      case TGSI_SEMANTIC_GENERIC:
         /* this includes texcoords and varying vars */
         src = draw_find_vs_output(cell->draw, TGSI_SEMANTIC_GENERIC,
                              fs->info.input_semantic_index[i]);
         assert(src >= 0);
         draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
         break;

      default:
         assert(0);
      }
   }

   draw_compute_vertex_size(vinfo);

   /* XXX only signal this if format really changes */
   cell->dirty |= CELL_NEW_VERTEX_INFO;
}

void cell_update_derived

(

struct cell_context *

cell

)

Update derived state, send current state to SPUs prior to rendering.

Definition at line 152 of file cell_state_derived.c.

{
   if (cell->dirty & (CELL_NEW_RASTERIZER |
                      CELL_NEW_FS |
                      CELL_NEW_VS))
      calculate_vertex_layout( cell );

#if 0
   if (cell->dirty & (CELL_NEW_SCISSOR |
                      CELL_NEW_DEPTH_STENCIL_ALPHA |
                      CELL_NEW_FRAMEBUFFER))
      compute_cliprect(cell);
#endif

   cell_emit_state(cell);

   cell->dirty = 0;

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