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authorKeith Whitwell <keithw@vmware.com>2009-07-02 11:28:56 +0100
committerKeith Whitwell <keithw@vmware.com>2009-07-02 11:28:56 +0100
commitb3e8e1cd4c1584f735e35914861ae2e8ae5b6b2b (patch)
treef3d95e61071c5ab50cc461b3cc86f7ad7ec06554
parent578230dbbffbf5317d6002d1023dcd62b57186f5 (diff)
mesa: ensure UsesFogFragCoord value is set for non-glsl shaders
With recent changes to support frontfacing in glsl, it is necessary to ensure that the UsesFogFragCoord value is accurate in all shaders. We were previously not setting it for fixed-function and ARB_fs shaders.
-rw-r--r--src/mesa/shader/arbprogparse.c7
-rw-r--r--src/mesa/shader/programopt.c1
2 files changed, 8 insertions, 0 deletions
diff --git a/src/mesa/shader/arbprogparse.c b/src/mesa/shader/arbprogparse.c
index bb4c5b38d4..f5053d3289 100644
--- a/src/mesa/shader/arbprogparse.c
+++ b/src/mesa/shader/arbprogparse.c
@@ -3922,6 +3922,13 @@ _mesa_parse_arb_fragment_program(GLcontext* ctx, GLenum target,
if (program->FogOption)
program->Base.InputsRead |= FRAG_BIT_FOGC;
+
+ /* XXX: assume that ARB fragment programs don't have access to the
+ * FrontFacing and PointCoord values stuffed into the fog
+ * coordinate in GLSL shaders.
+ */
+ if (program->Base.InputsRead & FRAG_BIT_FOGC)
+ program->UsesFogFragCoord = TRUE;
if (program->Base.Instructions)
_mesa_free(program->Base.Instructions);
diff --git a/src/mesa/shader/programopt.c b/src/mesa/shader/programopt.c
index f70c75cec8..ac5fe0f691 100644
--- a/src/mesa/shader/programopt.c
+++ b/src/mesa/shader/programopt.c
@@ -396,6 +396,7 @@ _mesa_append_fog_code(GLcontext *ctx, struct gl_fragment_program *fprog)
fprog->Base.Instructions = newInst;
fprog->Base.NumInstructions = inst - newInst;
fprog->Base.InputsRead |= FRAG_BIT_FOGC;
+ fprog->UsesFogFragCoord = GL_TRUE;
/* XXX do this? fprog->FogOption = GL_NONE; */
}