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gallium: use hardcoded cliptest code for fixed planes

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This commit is contained in:
Keith Whitwell 2007-12-10 22:38:44 +00:00
parent f2feb2e4c7
commit 0a79c65073
1 changed files with 12 additions and 1 deletions
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13
src/mesa/pipe/draw/draw_vertex_shader.c
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@ -51,7 +51,18 @@ compute_clipmask(const float *clip, /*const*/ float plane[][4], unsigned nr)
unsigned mask = 0;
unsigned i;
for (i = 0; i < nr; i++) {
/* Do the hardwired planes first:
*/
if (-clip[0] + clip[3] < 0) mask |= CLIP_RIGHT_BIT;
if ( clip[0] + clip[3] < 0) mask |= CLIP_LEFT_BIT;
if (-clip[1] + clip[3] < 0) mask |= CLIP_TOP_BIT;
if ( clip[1] + clip[3] < 0) mask |= CLIP_BOTTOM_BIT;
if (-clip[2] + clip[3] < 0) mask |= CLIP_FAR_BIT;
if ( clip[2] + clip[3] < 0) mask |= CLIP_NEAR_BIT;
/* Followed by any remaining ones:
*/
for (i = 6; i < nr; i++) {
if (dot4(clip, plane[i]) < 0)
mask |= (1<<i);
}