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authorKeith Whitwell <keith@tungstengraphics.com>2007-12-10 22:38:44 +0000
committerKeith Whitwell <keith@tungstengraphics.com>2007-12-10 22:38:44 +0000
commit0a79c65073db7dbeb9a83e40a4516edcb4f25ee5 (patch)
tree347e6dd22f4d16fb31ce4782bf25776a996e6a3f /src
parentf2feb2e4c7304b1c57af2f77f00766cb529822da (diff)
gallium: use hardcoded cliptest code for fixed planes
Diffstat (limited to 'src')
-rw-r--r--src/mesa/pipe/draw/draw_vertex_shader.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/src/mesa/pipe/draw/draw_vertex_shader.c b/src/mesa/pipe/draw/draw_vertex_shader.c
index eef71a7a4a..5294d38f47 100644
--- a/src/mesa/pipe/draw/draw_vertex_shader.c
+++ b/src/mesa/pipe/draw/draw_vertex_shader.c
@@ -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);
}