i965/fs: Rudimentary support for non-floating point texture results.

Not all texturing operations return floating point data.  For example,
the resinfo message (textureSize or TXS) returns integer data.  In the
future, we'll also add integer texture support.

ir_texture's type field contains this information; use its base type to
appropriately type the destination register.  We want to keep it as a
four component vector, however, since SIMD8 samplers always have a
response length of 4.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index 764351a34f999a69c9c1f37af109cffaf6b28d82..792799d9063c3cf44bbf929d9009bc7cb6279e5f 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -1075,7 +1075,7 @@ fs_visitor::visit(ir_texture *ir)
    /* Writemasking doesn't eliminate channels on SIMD8 texture
     * samples, so don't worry about them.
     */
-   fs_reg dst = fs_reg(this, glsl_type::vec4_type);
+   fs_reg dst = fs_reg(this, glsl_type::get_instance(ir->type->base_type, 4, 1));
 
    if (intel->gen >= 7) {
       inst = emit_texture_gen7(ir, dst, coordinate, sampler);