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draw: don't use clipvertex output if user plane clipping is disabled 

The non-llvm path made sure that both clip and pre_clip_pos point to the data
output by position, not clipvertex, if user based clipping is disabled.
However, the llvm path did not, which apparently led to failures if
gl_ClipVertex was written but user plane clipping not enabled (bug 80183).
Why I have no idea really, but just make it match the non-llvm behavior...

Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Roland Scheidegger 2014-08-09 03:51:23 +02:00
parent 0f4c5a70c6
commit 6d2ecdb4a6
1 changed files with 2 additions and 2 deletions
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4
src/gallium/auxiliary/draw/draw_llvm.c
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@ -1732,8 +1732,8 @@ draw_llvm_generate(struct draw_llvm *llvm, struct draw_llvm_variant *variant,
if (pos != -1 && cv != -1) {
/* store original positions in clip before further manipulation */
store_clip(gallivm, vs_type, io, outputs, 0, cv);
store_clip(gallivm, vs_type, io, outputs, 1, pos);
store_clip(gallivm, vs_type, io, outputs, FALSE, key->clip_user ? cv : pos);
store_clip(gallivm, vs_type, io, outputs, TRUE, pos);
/* do cliptest */
if (enable_cliptest) {