llvmpipe: get rid of depth swizzling.

Eliminating this we no longer need to copy between linear and swizzled layout.
This is probably not quite ideal since it's a bit more work for now, could do
some optimizations by moving depth testing outside the fragment shader loop
(but tricky for early depth test as we don't have neither the mask nor the
interpolated z in the right order handy).
The large amount of tile/untile code is no longer needed will be deleted
in next commit.
No piglit regressions.
v2: change a forgotten LAYOUT_NONE to LAYOUT_LINEAR.
v3: fix (bogus) uninitialized variable warnings, add comments, fix a bad type

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_jit.h b/src/gallium/drivers/llvmpipe/lp_jit.h
index 4eddb2a..4e9ca76 100644
--- a/src/gallium/drivers/llvmpipe/lp_jit.h
+++ b/src/gallium/drivers/llvmpipe/lp_jit.h
@@ -193,6 +193,7 @@ enum {
  * @param mask          mask of visible pixels in block
  * @param thread_data   task thread data
  * @param stride        color buffer row stride in bytes
+ * @param depth_stride  depth buffer row stride in bytes
  */
 typedef void
 (*lp_jit_frag_func)(const struct lp_jit_context *context,
@@ -206,7 +207,8 @@ typedef void
                     void *depth,
                     uint32_t mask,
                     struct lp_jit_thread_data *thread_data,
-                    unsigned *stride);
+                    unsigned *stride,
+                    unsigned depth_stride);
 
 
 void