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draw: disable depth clipping if depth clamp is enabled

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This commit is contained in:
Marek Olšák 2010-07-21 20:31:39 +02:00
parent c304869ec0
commit 9ca48de106
3 changed files with 11 additions and 4 deletions
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1
src/gallium/auxiliary/draw/draw_context.c
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@ -216,6 +216,7 @@ void draw_set_clip_state( struct draw_context *draw,
assert(clip->nr <= PIPE_MAX_CLIP_PLANES);
memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0]));
draw->nr_planes = 6 + clip->nr;
draw->depth_clamp = clip->depth_clamp;
}

1
src/gallium/auxiliary/draw/draw_private.h
View file

@ -249,6 +249,7 @@ struct draw_context
*/
float plane[12][4];
unsigned nr_planes;
boolean depth_clamp;
/* If a prim stage introduces new vertex attributes, they'll be stored here
*/

13
src/gallium/auxiliary/draw/draw_pt_post_vs.c
View file

@ -57,7 +57,8 @@ dot4(const float *a, const float *b)
}
static INLINE unsigned
compute_clipmask_gl(const float *clip, /*const*/ float plane[][4], unsigned nr)
compute_clipmask_gl(const float *clip, /*const*/ float plane[][4], unsigned nr,
boolean clip_depth)
{
unsigned mask = 0x0;
unsigned i;
@ -74,8 +75,10 @@ compute_clipmask_gl(const float *clip, /*const*/ float plane[][4], unsigned nr)
if ( clip[0] + clip[3] < 0) mask |= (1<<1);
if (-clip[1] + clip[3] < 0) mask |= (1<<2);
if ( clip[1] + clip[3] < 0) mask |= (1<<3);
if ( clip[2] + clip[3] < 0) mask |= (1<<4); /* match mesa clipplane numbering - for now */
if (-clip[2] + clip[3] < 0) mask |= (1<<5); /* match mesa clipplane numbering - for now */
if (clip_depth) {
if ( clip[2] + clip[3] < 0) mask |= (1<<4); /* match mesa clipplane numbering - for now */
if (-clip[2] + clip[3] < 0) mask |= (1<<5); /* match mesa clipplane numbering - for now */
}
/* Followed by any remaining ones:
*/
@ -120,9 +123,11 @@ static boolean post_vs_cliptest_viewport_gl( struct pt_post_vs *pvs,
out->clip[3] = position[3];
out->vertex_id = 0xffff;
/* Disable depth clipping if depth clamping is enabled. */
out->clipmask = compute_clipmask_gl(out->clip,
pvs->draw->plane,
pvs->draw->nr_planes);
pvs->draw->nr_planes,
!pvs->draw->depth_clamp);
clipped += out->clipmask;
if (out->clipmask == 0)