Here's a small patch which makes color / blend logic ops work with r200/radeon (untested on radeon). It's actually a copy&paste job from the mesa sources, mesa has the comment
/* This is needed to support 1.1's RGB logic ops AND
* 1.0's blending logicops.
*/
wherever it tries to figure out if logic ops are actually enabled. Looks like a trap in the OGL specification ;-), maybe other drivers might be affected?
Patch fixes samples/blendeq and samples/blendxor (on my rv250), I hope it doesn't break anything.
Good catch.
[snip]
- if ( ctx->Color.ColorLogicOpEnabled ) {
+ if ( ctx->Color.ColorLogicOpEnabled || (ctx->Color.BlendEnabled && mode ==
GL_LOGIC_OP)) {
There's derrived state that Mesa calculates just for this case. The test should be 'if ( ctx->Color._LogicOpEnabled )'.
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