[Mesa-dev] [PATCH 4/7] glsl: Add gl_{Max, Min}ProgramTexelOffset built-in constants.

[Matt Turner]

Required by ARB_shading_language_420pack. Note that the 420pack spec
incorrectly specifies their values as (Min, Max) = (-7, 8) when they
should be (-8, 7) as listed in the GLSL 4.30 and ESSL 3.0 specs.
---
 src/glsl/builtin_variables.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/glsl/builtin_variables.cpp b/src/glsl/builtin_variables.cpp
index 4bb361c..f4ac205 100644
--- a/src/glsl/builtin_variables.cpp
+++ b/src/glsl/builtin_variables.cpp
@@ -790,6 +790,13 @@ generate_130_uniforms(exec_list *instructions,
                         state->Const.MaxClipPlanes);
    add_builtin_constant(instructions, symtab, "gl_MaxVaryingComponents",
 			state->Const.MaxVaryingFloats);
+
+   if (state->ARB_shading_language_420pack_enable) {
+      add_builtin_constant(instructions, symtab, "gl_MinProgramTexelOffset",
+                           state->Const.MinProgramTexelOffset);
+      add_builtin_constant(instructions, symtab, "gl_MaxProgramTexelOffset",
+                           state->Const.MaxProgramTexelOffset);
+   }
 }
 
 
-- 
1.8.1.5