glsl: Change texel offsets to a single vector rvalue.

Having these as actual integer values makes it difficult to implement
the texture*Offset built-in functions, since the offset is actually a
function parameter (which doesn't have a constant value).

The original rationale was that some hardware needs these offset baked
into the instruction opcode.  However, at least i965 should be able to
support non-constant offsets.  Others should be able to rely on inlining
and constant propagation.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/glsl/ir_hv_accept.cpp b/src/glsl/ir_hv_accept.cpp
index be8b36a7cf8..4a607dc8749 100644
--- a/src/glsl/ir_hv_accept.cpp
+++ b/src/glsl/ir_hv_accept.cpp
@@ -187,6 +187,12 @@ ir_texture::accept(ir_hierarchical_visitor *v)
 	 return (s == visit_continue_with_parent) ? visit_continue : s;
    }
 
+   if (this->offset) {
+      s = this->offset->accept(v);
+      if (s != visit_continue)
+	 return (s == visit_continue_with_parent) ? visit_continue : s;
+   }
+
    switch (this->op) {
    case ir_tex:
       break;