From f8a4ad1aeeef1debe6f206bc30696304edd7704c Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Wed, 7 Jan 2009 18:22:56 -0700 Subject: [PATCH] glsl: check that the fragment shader does not write both gl_FragColor and gl_FragData[] --- src/mesa/shader/slang/slang_link.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/src/mesa/shader/slang/slang_link.c b/src/mesa/shader/slang/slang_link.c index 3f953d8..a68cafc 100644 --- a/src/mesa/shader/slang/slang_link.c +++ b/src/mesa/shader/slang/slang_link.c @@ -644,6 +644,17 @@ _slang_link(GLcontext *ctx, } } + /* check that gl_FragColor and gl_FragData are not both written to */ + if (shProg->FragmentProgram) { + GLbitfield outputsWritten = shProg->FragmentProgram->Base.OutputsWritten; + if ((outputsWritten & ((1 << FRAG_RESULT_COLR))) && + (outputsWritten >= (1 << FRAG_RESULT_DATA0))) { + link_error(shProg, "Fragment program cannot write both gl_FragColor" + " and gl_FragData[].\n"); + return; + } + } + if (fragProg && shProg->FragmentProgram) { /* Compute initial program's TexturesUsed info */ -- 2.7.4