sp_quad_occlusion.c File Reference

Include dependency graph for sp_quad_occlusion.c:

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Functions
static unsigned	count_bits (unsigned val)
	Quad occlusion counter stage.
static void	occlusion_count_quad (struct quad_stage *qs, struct quad_header *quad)
static void	occlusion_begin (struct quad_stage *qs)
static void	occlusion_destroy (struct quad_stage *qs)
struct quad_stage *	sp_quad_occlusion_stage (struct softpipe_context *softpipe)

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Function Documentation

static unsigned count_bits

(

unsigned

val

)

[static]

Quad occlusion counter stage.

Author:

Brian Paul

Definition at line 42 of file sp_quad_occlusion.c.

{
   unsigned i;

   for (i = 0; val ; val >>= 1)
      i += (val & 1);

   return i;
}

static void occlusion_begin

(

struct quad_stage *

qs

)

[static]

Definition at line 63 of file sp_quad_occlusion.c.

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

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

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

Definition at line 53 of file sp_quad_occlusion.c.

References count_bits(), quad_header::inout, quad_header_inout::mask, quad_stage::next, softpipe_context::occlusion_count, quad_stage::run, and quad_stage::softpipe.

{
   struct softpipe_context *softpipe = qs->softpipe;

   softpipe->occlusion_count += count_bits(quad->inout.mask);

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

static void occlusion_destroy

(

struct quad_stage *

qs

)

[static]

Definition at line 69 of file sp_quad_occlusion.c.

References FREE.

{
   FREE( qs );
}

struct quad_stage* sp_quad_occlusion_stage

(

struct softpipe_context *

softpipe

)

[read]

Definition at line 75 of file sp_quad_occlusion.c.

References quad_stage::begin, CALLOC_STRUCT, quad_stage::destroy, occlusion_begin(), occlusion_count_quad(), occlusion_destroy(), quad_stage::run, and quad_stage::softpipe.

{
   struct quad_stage *stage = CALLOC_STRUCT(quad_stage);

   stage->softpipe = softpipe;
   stage->begin = occlusion_begin;
   stage->run = occlusion_count_quad;
   stage->destroy = occlusion_destroy;

   return stage;
}

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