https://bugs.freedesktop.org/show_bug.cgi?id=30261
Summary: [GLSL 1.20] allowing inconsistent invariant
declaration between two vertex shaders
Product: Mesa
Version: git
Platform: All
OS/Version: All
Status: NEW
Severity: minor
Priority: medium
Component: Mesa core
AssignedTo: mesa-dev@lists.freedesktop.org
ReportedBy: gordon....@intel.com
CC: i...@freedesktop.org
Created an attachment (id=38793)
View: https://bugs.freedesktop.org/attachment.cgi?id=38793
Review: https://bugs.freedesktop.org/review?bug=30261&attachment=38793
new piglit case
GLSL 1.20 section 4.3.6 says:
The type and presence of the invariant qualifiers of varying variables with the
same name declared in linked vertex and fragments shaders must match, otherwise
the link command will fail.
GLSL 1.50 section 4.6.1 says more clearly:
For variables leaving one shader and coming into another shader, the invariant
keyword has to be used in both shaders, or a link error will result.
The mesa glsl compiler fails link correctly for one vertex shader and one
fragment shader.
But it links (incorrectly) successfully for two vertex shaders.
This also exists in the old glsl compiler. So I'm not marking this as release
blocker.
Tested on Piketon (i965) with mesa master
ca92ae2699c4aad21c0811b9a5562b9223816caf.
New piglit case attached.
(This issues also applies for centroid. I'll add a new case for it after this
one gets handled.)
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