i965/fs: Preserve the source register type when doing color writes.

When rendering to integer color buffers, we need to be careful to use
MRFs of the correct type when emitting color writes.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index 15009dcc57b3aecab547b8eab082935e48dcf5f8..3e2feafec385a8901d69ff6a99810518390e27d2 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -1853,7 +1853,7 @@ fs_visitor::emit_color_write(int index, int first_color_mrf, fs_reg color)
        * m + 7: a1
        */
       inst = emit(BRW_OPCODE_MOV,
-                 fs_reg(MRF, first_color_mrf + index * reg_width),
+                 fs_reg(MRF, first_color_mrf + index * reg_width, color.type),
                  color);
       inst->saturate = c->key.clamp_fragment_color;
    } else {
@@ -1874,19 +1874,22 @@ fs_visitor::emit_color_write(int index, int first_color_mrf, fs_reg color)
          * destination + 4.
          */
         inst = emit(BRW_OPCODE_MOV,
-                    fs_reg(MRF, BRW_MRF_COMPR4 + first_color_mrf + index),
+                    fs_reg(MRF, BRW_MRF_COMPR4 + first_color_mrf + index,
+                           color.type),
                     color);
         inst->saturate = c->key.clamp_fragment_color;
       } else {
         push_force_uncompressed();
-        inst = emit(BRW_OPCODE_MOV, fs_reg(MRF, first_color_mrf + index),
+        inst = emit(BRW_OPCODE_MOV, fs_reg(MRF, first_color_mrf + index,
+                                           color.type),
                     color);
         inst->saturate = c->key.clamp_fragment_color;
         pop_force_uncompressed();
 
         push_force_sechalf();
         color.sechalf = true;
-        inst = emit(BRW_OPCODE_MOV, fs_reg(MRF, first_color_mrf + index + 4),
+        inst = emit(BRW_OPCODE_MOV, fs_reg(MRF, first_color_mrf + index + 4,
+                                           color.type),
                     color);
         inst->saturate = c->key.clamp_fragment_color;
         pop_force_sechalf();