spu_render.h File Reference

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Functions
void	cmd_render (const struct cell_command_render *render, uint *pos_incr)
	Render primitives.

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Function Documentation

void cmd_render	(	const struct cell_command_render *	render,
		uint *	pos_incr
	)

Render primitives.

Parameters:

pos_incr

returns value indicating how may words to skip after this command in the batch buffer

find tiles which intersect the prim bounding box

loop over tiles, rendering tris

Definition at line 168 of file spu_render.c.

References ALIGN16_ATTRIB, align_pointer(), ASSERT, ASSERT_ALIGN16, cell_init_info::buffers, CELL_BUFFER_SIZE, spu_global::cur_ctile_status, spu_global::cur_ztile_status, Debug, spu_global::fb, get_cz_tiles(), spu_framebuffer::height_tiles, cell_init_info::id, spu_global::init, cell_command_render::inline_verts, cell_command_render::min_index, my_tile(), cell_command_render::num_indexes, cell_command_render::num_verts, PIPE_PRIM_TRIANGLES, cell_command_render::prim_type, put_cz_tiles(), ROUNDUP8, spu, TAG_SURFACE_CLEAR, TAG_VERTEX_BUFFER, tile_bounding_box(), tri_draw(), cell_command_render::vertex_buf, cell_command_render::vertex_size, wait_on_mask(), wait_put_cz_tiles(), and spu_framebuffer::width_tiles.

{
   /* we'll DMA into these buffers */
   ubyte vertex_data[CELL_BUFFER_SIZE] ALIGN16_ATTRIB;
   const uint vertex_size = render->vertex_size; /* in bytes */
   /*const*/ uint total_vertex_bytes = render->num_verts * vertex_size;
   uint index_bytes;
   const ubyte *vertices;
   const ushort *indexes;
   uint i, j;


   if (Debug) {
      printf("SPU %u: RENDER prim %u, num_vert=%u  num_ind=%u  "
             "inline_vert=%u\n",
             spu.init.id,
             render->prim_type,
             render->num_verts,
             render->num_indexes,
             render->inline_verts);

      /*
      printf("       bound: %g, %g .. %g, %g\n",
             render->xmin, render->ymin, render->xmax, render->ymax);
      */
   }

   ASSERT(sizeof(*render) % 4 == 0);
   ASSERT(total_vertex_bytes % 16 == 0);
   ASSERT(render->prim_type == PIPE_PRIM_TRIANGLES);
   ASSERT(render->num_indexes % 3 == 0);


   /* indexes are right after the render command in the batch buffer */
   indexes = (const ushort *) (render + 1);
   index_bytes = ROUNDUP8(render->num_indexes * 2);
   *pos_incr = index_bytes / 8 + sizeof(*render) / 8;


   if (render->inline_verts) {
      /* Vertices are after indexes in batch buffer at next 16-byte addr */
      vertices = (const ubyte *) render + (*pos_incr * 8);
      vertices = (const ubyte *) align_pointer((void *) vertices, 16);
      ASSERT_ALIGN16(vertices);
      *pos_incr = ((vertices + total_vertex_bytes) - (ubyte *) render) / 8;
   }
   else {
      /* Begin DMA fetch of vertex buffer */
      ubyte *src = spu.init.buffers[render->vertex_buf];
      ubyte *dest = vertex_data;

      /* skip vertex data we won't use */
#if 01
      src += render->min_index * vertex_size;
      dest += render->min_index * vertex_size;
      total_vertex_bytes -= render->min_index * vertex_size;
#endif
      ASSERT(total_vertex_bytes % 16 == 0);
      ASSERT_ALIGN16(dest);
      ASSERT_ALIGN16(src);

      mfc_get(dest,   /* in vertex_data[] array */
              (unsigned int) src,  /* src in main memory */
              total_vertex_bytes,  /* size */
              TAG_VERTEX_BUFFER,
              0, /* tid */
              0  /* rid */);

      vertices = vertex_data;

      wait_on_mask(1 << TAG_VERTEX_BUFFER);
   }


   uint txmin, tymin, box_width_tiles, box_num_tiles;
   tile_bounding_box(render, &txmin, &tymin,
                     &box_num_tiles, &box_width_tiles);


   /* make sure any pending clears have completed */
   wait_on_mask(1 << TAG_SURFACE_CLEAR); /* XXX temporary */


   for (i = 0; i < box_num_tiles; i++) {
      const uint tx = txmin + i % box_width_tiles;
      const uint ty = tymin + i / box_width_tiles;

      ASSERT(tx < spu.fb.width_tiles);
      ASSERT(ty < spu.fb.height_tiles);

      if (!my_tile(tx, ty))
         continue;

      spu.cur_ctile_status = spu.ctile_status[ty][tx];
      spu.cur_ztile_status = spu.ztile_status[ty][tx];

      get_cz_tiles(tx, ty);

      uint drawn = 0;

      /* loop over tris */
      for (j = 0; j < render->num_indexes; j += 3) {
         const float *v0, *v1, *v2;

         v0 = (const float *) (vertices + indexes[j+0] * vertex_size);
         v1 = (const float *) (vertices + indexes[j+1] * vertex_size);
         v2 = (const float *) (vertices + indexes[j+2] * vertex_size);

         drawn += tri_draw(v0, v1, v2, tx, ty);
      }

      //printf("SPU %u: drew %u of %u\n", spu.init.id, drawn, render->num_indexes/3);

      /* write color/z tiles back to main framebuffer, if dirtied */
      put_cz_tiles(tx, ty);

      wait_put_cz_tiles(); /* XXX seems unnecessary... */

      spu.ctile_status[ty][tx] = spu.cur_ctile_status;
      spu.ztile_status[ty][tx] = spu.cur_ztile_status;
   }

   if (Debug)
      printf("SPU %u: RENDER done\n",
             spu.init.id);
}

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