i965: Add support for EXT_texture_swizzle to the new FS backend.

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index dd2af2bd1d322adaf449f197fe29c4f99a06575a..5ebf9063df2b8f10cf3a0c35d213ef21fe68bde6 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -1437,6 +1437,27 @@ fs_visitor::visit(ir_texture *ir)
 
    if (ir->shadow_comparitor)
       inst->shadow_compare = true;
+
+   if (c->key.tex_swizzles[inst->sampler] != SWIZZLE_NOOP) {
+      fs_reg swizzle_dst = fs_reg(this, glsl_type::vec4_type);
+
+      for (int i = 0; i < 4; i++) {
+        int swiz = GET_SWZ(c->key.tex_swizzles[inst->sampler], i);
+        fs_reg l = swizzle_dst;
+        l.reg_offset += i;
+
+        if (swiz == SWIZZLE_ZERO) {
+           emit(fs_inst(BRW_OPCODE_MOV, l, fs_reg(0.0f)));
+        } else if (swiz == SWIZZLE_ONE) {
+           emit(fs_inst(BRW_OPCODE_MOV, l, fs_reg(1.0f)));
+        } else {
+           fs_reg r = dst;
+           r.reg_offset += GET_SWZ(c->key.tex_swizzles[inst->sampler], i);
+           emit(fs_inst(BRW_OPCODE_MOV, l, r));
+        }
+      }
+      this->result = swizzle_dst;
+   }
 }
 
 void