sp_quad_coverage.c File Reference

Include dependency graph for sp_quad_coverage.c:

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Functions
static void	coverage_quad (struct quad_stage *qs, struct quad_header *quad)
	Apply AA coverage to quad alpha valus.
static void	coverage_begin (struct quad_stage *qs)
static void	coverage_destroy (struct quad_stage *qs)
struct quad_stage *	sp_quad_coverage_stage (struct softpipe_context *softpipe)

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Function Documentation

static void coverage_begin

(

struct quad_stage *

qs

)

[static]

Definition at line 71 of file sp_quad_coverage.c.

References quad_stage::begin, and quad_stage::next.

{
   qs->next->begin(qs->next);
}

static void coverage_destroy

(

struct quad_stage *

qs

)

[static]

Definition at line 77 of file sp_quad_coverage.c.

References FREE.

{
   FREE( qs );
}

static void coverage_quad	(	struct quad_stage *	qs,
		struct quad_header *	quad
	)			[static]

Apply AA coverage to quad alpha valus.

Author:

Brian Paul Multiply quad's alpha values by the fragment coverage.

Definition at line 46 of file sp_quad_coverage.c.

References assert, quad_header_output::color, quad_header_input::coverage, softpipe_context::framebuffer, quad_header::input, pipe_rasterizer_state::line_smooth, quad_stage::next, pipe_framebuffer_state::num_cbufs, quad_header::output, pipe_rasterizer_state::point_smooth, pipe_rasterizer_state::poly_smooth, quad_header_input::prim, PRIM_LINE, PRIM_POINT, PRIM_TRI, QUAD_SIZE, softpipe_context::rasterizer, quad_stage::run, and quad_stage::softpipe.

{
   struct softpipe_context *softpipe = qs->softpipe;

   if ((softpipe->rasterizer->poly_smooth && quad->input.prim == PRIM_TRI) ||
       (softpipe->rasterizer->line_smooth && quad->input.prim == PRIM_LINE) ||
       (softpipe->rasterizer->point_smooth && quad->input.prim == PRIM_POINT)) {
      uint cbuf;

      /* loop over colorbuffer outputs */
      for (cbuf = 0; cbuf < softpipe->framebuffer.num_cbufs; cbuf++) {
         float (*quadColor)[4] = quad->output.color[cbuf];
         unsigned j;
         for (j = 0; j < QUAD_SIZE; j++) {
            assert(quad->input.coverage[j] >= 0.0);
            assert(quad->input.coverage[j] <= 1.0);
         quadColor[3][j] *= quad->input.coverage[j];
         }
      }
   }

   qs->next->run(qs->next, quad);
}

struct quad_stage* sp_quad_coverage_stage

(

struct softpipe_context *

softpipe

)

[read]

Definition at line 83 of file sp_quad_coverage.c.

References quad_stage::begin, CALLOC_STRUCT, coverage_begin(), coverage_destroy(), coverage_quad(), quad_stage::destroy, quad_stage::run, and quad_stage::softpipe.

{
   struct quad_stage *stage = CALLOC_STRUCT(quad_stage);

   stage->softpipe = softpipe;
   stage->begin = coverage_begin;
   stage->run = coverage_quad;
   stage->destroy = coverage_destroy;

   return stage;
}

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