Re-implement GLSL texture sampler variables.

GLSL sampler variables indicate which texture unit to use for TEX instructions.
Previously, this was baked into the fragment/vertex program and couldn't be
readily changed once set.
Now, SamplerUnits[] array indicates which texture unit is to be used for
each sampler variable.  These values are set with glUniform1i().
This is extra state that must be passed to the fragment/vertex program
executor at runtime.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c
index fe13f2865c..2b08e7020f 100644
--- a/src/mesa/shader/slang/slang_emit.c
+++ b/src/mesa/shader/slang/slang_emit.c
@@ -906,11 +906,15 @@ emit_tex(slang_emit_info *emitInfo, slang_ir_node *n)
    assert(n->Children[0]->Store->Size >= TEXTURE_1D_INDEX);
    assert(n->Children[0]->Store->Size <= TEXTURE_RECT_INDEX);
 
-   inst->Sampler = n->Children[0]->Store->Index; /* i.e. uniform's index */
    inst->TexSrcTarget = n->Children[0]->Store->Size;
+#if 0
    inst->TexSrcUnit = 27; /* Dummy value; the TexSrcUnit will be computed at
                            * link time, using the sampler uniform's value.
                            */
+   inst->Sampler = n->Children[0]->Store->Index; /* i.e. uniform's index */
+#else
+   inst->TexSrcUnit = n->Children[0]->Store->Index; /* i.e. uniform's index */
+#endif
    return inst;
 }