sp_quad_bufloop.c File Reference

Include dependency graph for sp_quad_bufloop.c:

Go to the source code of this file.

Functions
static void	cbuf_loop_quad (struct quad_stage *qs, struct quad_header *quad)
	Loop over colorbuffers, passing quad to next stage each time.
static void	cbuf_loop_begin (struct quad_stage *qs)
static void	cbuf_loop_destroy (struct quad_stage *qs)
struct quad_stage *	sp_quad_bufloop_stage (struct softpipe_context *softpipe)
	Create the colorbuffer loop stage.

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Function Documentation

static void cbuf_loop_begin

(

struct quad_stage *

qs

)

[static]

Definition at line 46 of file sp_quad_bufloop.c.

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

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

static void cbuf_loop_destroy

(

struct quad_stage *

qs

)

[static]

Definition at line 52 of file sp_quad_bufloop.c.

References FREE.

{
   FREE( qs );
}

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

Loop over colorbuffers, passing quad to next stage each time.

Definition at line 13 of file sp_quad_bufloop.c.

References assert, softpipe_context::framebuffer, quad_stage::next, pipe_framebuffer_state::num_cbufs, PIPE_MAX_COLOR_BUFS, QUAD_SIZE, quad_stage::run, and quad_stage::softpipe.

{
   struct softpipe_context *softpipe = qs->softpipe;
   float tmp[PIPE_MAX_COLOR_BUFS][4][QUAD_SIZE];
   unsigned i;

   assert(sizeof(quad->outputs.color) == sizeof(tmp));
   assert(softpipe->framebuffer.num_cbufs <= PIPE_MAX_COLOR_BUFS);

   /* make copy of original colors since they can get modified
    * by blending and masking.
    * XXX we won't have to do this if the fragment program actually emits
    * N separate colors and we're drawing to N color buffers (MRT).
    * But if we emitted one color and glDrawBuffer(GL_FRONT_AND_BACK) is
    * in effect, we need to save/restore colors like this.
    */
   memcpy(tmp, quad->outputs.color, sizeof(tmp));

   for (i = 0; i < softpipe->framebuffer.num_cbufs; i++) {
      /* set current cbuffer */
#if 0 /* obsolete & going away */
      softpipe->current_cbuf = i;
#endif

      /* pass blended quad to next stage */
      qs->next->run(qs->next, quad);

      /* restore quad's colors for next buffer */
      memcpy(quad->outputs.color, tmp, sizeof(tmp));
   }
}

struct quad_stage* sp_quad_bufloop_stage

(

struct softpipe_context *

softpipe

)

[read]

Create the colorbuffer loop stage.

This is used to implement multiple render targets and GL_FRONT_AND_BACK rendering.

Definition at line 63 of file sp_quad_bufloop.c.

References quad_stage::begin, CALLOC_STRUCT, cbuf_loop_begin(), cbuf_loop_destroy(), cbuf_loop_quad(), quad_stage::destroy, quad_stage::run, and quad_stage::softpipe.

{
   struct quad_stage *stage = CALLOC_STRUCT(quad_stage);

   stage->softpipe = softpipe;
   stage->begin = cbuf_loop_begin;
   stage->run = cbuf_loop_quad;
   stage->destroy = cbuf_loop_destroy;

   return stage;
}

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