From d83d2ea9a6562314388c0a1941137001960b6453 Mon Sep 17 00:00:00 2001 From: Anuj Phogat Date: Thu, 5 Mar 2015 11:07:52 -0800 Subject: glsl: Generate link error for non-matching gl_FragCoord redeclarations in different fragment shaders. This also applies to a case when gl_FragCoord is redeclared with no layout qualifiers in one fragment shader and not declared but used in other fragment shader. Signed-off-by: Anuj Phogat Khronos Bug#12957 Cc: "10.5" Reviewed-by: Chris Forbes (cherry picked from commit d8208312a3a200b4e6d71ce533d835b2d705234a) --- src/glsl/linker.cpp | 15 ++------------- 1 file changed, 2 insertions(+), 13 deletions(-) diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp index 3f5eac1e26c..01526de56c6 100644 --- a/src/glsl/linker.cpp +++ b/src/glsl/linker.cpp @@ -1364,24 +1364,13 @@ link_fs_input_layout_qualifiers(struct gl_shader_program *prog, * "If gl_FragCoord is redeclared in any fragment shader in a program, * it must be redeclared in all the fragment shaders in that program * that have a static use gl_FragCoord." - * - * Exclude the case when one of the 'linked_shader' or 'shader' redeclares - * gl_FragCoord with no layout qualifiers but the other one doesn't - * redeclare it. If we strictly follow GLSL 1.50 spec's language, it - * should be a link error. But, generating link error for this case will - * be a wrong behaviour which spec didn't intend to do and it could also - * break some applications. */ if ((linked_shader->redeclares_gl_fragcoord && !shader->redeclares_gl_fragcoord - && shader->uses_gl_fragcoord - && (linked_shader->origin_upper_left - || linked_shader->pixel_center_integer)) + && shader->uses_gl_fragcoord) || (shader->redeclares_gl_fragcoord && !linked_shader->redeclares_gl_fragcoord - && linked_shader->uses_gl_fragcoord - && (shader->origin_upper_left - || shader->pixel_center_integer))) { + && linked_shader->uses_gl_fragcoord)) { linker_error(prog, "fragment shader defined with conflicting " "layout qualifiers for gl_FragCoord\n"); } -- cgit v1.2.3