http://bugs.freedesktop.org/show_bug.cgi?id=10788
Summary: GL_ARB_fragment_program implement incorrect about state
of fragment.fogcoord
Product: Mesa
Version: CVS
Platform: Other
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Mesa core
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
CC: [EMAIL PROTECTED]
In extension GL_ARB_fragment_program, the components value of fragment.fogcoord
are (f, 0, 0, 1), but Mesa assign the components value as (f, f, f, f).
For example:
Call glProgramStringARB with program string:
"!!ARBfp1.0\nATTRIB state_param = fragment.fogcoord;\nMOV result.color,
state_param;\n\nEND";
and set the fog coord as 0.6, then draw a quads, the pixel color should be
(0.6, 0, 0, 1) instead of (0.6, 0.6, 0.6, 0.6);
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