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glsl2: Allow a fragment shader to not write a color.

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I can't find any text justifying this check, and it caused a
reasonable-looking shader in glsl-bug-22603 (which writes only
gl_FragDepth) to fail.
This commit is contained in:
Eric Anholt
2010-06-30 14:51:50 -07:00
parent 3e2127b9de
commit 97eba76b8c
1 changed files with 0 additions and 6 deletions
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6
src/glsl/linker.cpp
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@@ -232,12 +232,6 @@ validate_fragment_shader_executable(struct gl_shader_program *prog,
frag_color.run(shader->ir);
frag_data.run(shader->ir);
if (!frag_color.variable_found() && !frag_data.variable_found()) {
linker_error_printf(prog, "fragment shader does not write to "
"`gl_FragColor' or `gl_FragData'\n");
return false;
}
if (frag_color.variable_found() && frag_data.variable_found()) {
linker_error_printf(prog, "fragment shader writes to both "
"`gl_FragColor' and `gl_FragData'\n");