mesa: fix another "out of samplers" problem

Now only the samplers that are actually used by texture() functions are
saved in the uniform variable list.  Before, we could run out of samplers
if too many were declared while only some of them were actually used.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c
index 500112b6f6..b7a3cfb617 100644
--- a/src/mesa/shader/slang/slang_emit.c
+++ b/src/mesa/shader/slang/slang_emit.c
@@ -1290,6 +1290,7 @@ emit_tex(slang_emit_info *emitInfo, slang_ir_node *n)
 
    /* Child[0] is the sampler (a uniform which'll indicate the texture unit) */
    assert(n->Children[0]->Store);
+   assert(n->Children[0]->Store->File == PROGRAM_SAMPLER);
    /* Store->Index is the sampler index */
    assert(n->Children[0]->Store->Index >= 0);
    /* Store->Size is the texture target */
@@ -1299,6 +1300,10 @@ emit_tex(slang_emit_info *emitInfo, slang_ir_node *n)
    inst->TexSrcTarget = n->Children[0]->Store->Size;
    inst->TexSrcUnit = n->Children[0]->Store->Index; /* i.e. uniform's index */
 
+   /* mark the sampler as being used */
+   _mesa_use_uniform(emitInfo->prog->Parameters,
+                     (char *) n->Children[0]->Var->a_name);
+
    return inst;
 }
 
@@ -2104,7 +2109,8 @@ emit_var_ref(slang_emit_info *emitInfo, slang_ir_node *n)
 
       n->Store->Index = index;
    }
-   else if (n->Store->File == PROGRAM_UNIFORM) {
+   else if (n->Store->File == PROGRAM_UNIFORM ||
+            n->Store->File == PROGRAM_SAMPLER) {
       /* mark var as used */
       _mesa_use_uniform(emitInfo->prog->Parameters, (char *) n->Var->a_name);
    }