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New 'draw' module for primitive drawing (clipping, culling, etc).

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This commit is contained in:
Brian
2007-07-09 16:14:26 -06:00
parent 9fbdf50078
commit 279ffe3f16
21 changed files with 372 additions and 338 deletions
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21
src/mesa/pipe/draw/draw_cull.c
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@@ -27,11 +27,10 @@
/* Authors: Keith Whitwell <keith@tungstengraphics.com>
*/
#include "imports.h"
#include "main/imports.h"
#include "pipe/p_defines.h"
#include "sp_context.h"
#include "sp_prim.h"
#include "draw_private.h"
@@ -52,7 +51,7 @@ static void cull_begin( struct prim_stage *stage )
{
struct cull_stage *cull = cull_stage(stage);
cull->mode = stage->softpipe->setup.cull_mode;
cull->mode = stage->draw->setup.cull_mode;
stage->next->begin( stage->next );
}
@@ -76,10 +75,13 @@ static void cull_tri( struct prim_stage *stage,
_mesa_printf("%s %f\n", __FUNCTION__, header->det );
if (header->det != 0) {
/* non-zero area */
GLuint mode = (header->det < 0) ? PIPE_WINDING_CW : PIPE_WINDING_CCW;
if ((mode & cull_stage(stage)->mode) == 0)
if ((mode & cull_stage(stage)->mode) == 0) {
/* triangle is not culled, pass to next stage */
stage->next->tri( stage->next, header );
}
}
}
@@ -97,18 +99,23 @@ static void cull_point( struct prim_stage *stage,
stage->next->point( stage->next, header );
}
static void cull_end( struct prim_stage *stage )
{
stage->next->end( stage->next );
}
struct prim_stage *prim_cull( struct softpipe_context *softpipe )
/**
* Create a new polygon culling stage.
*/
struct prim_stage *prim_cull( struct draw_context *draw )
{
struct cull_stage *cull = CALLOC_STRUCT(cull_stage);
prim_alloc_tmps( &cull->stage, 0 );
cull->stage.softpipe = softpipe;
cull->stage.draw = draw;
cull->stage.next = NULL;
cull->stage.begin = cull_begin;
cull->stage.point = cull_point;