intel: Add is_hiz_depth_format() to intel_contex.vtbl

Given a format, is_hiz_depth_format() indicates if HiZ can be enabled on
a depthbuffer of that format.

Reviewed-by: Eric Anholt <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>
Signed-off-by: Chad Versace <[email protected]>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_vtbl.c b/src/mesa/drivers/dri/i965/brw_vtbl.c
index 9f99ef57214..69650e1df77 100644
--- a/src/mesa/drivers/dri/i965/brw_vtbl.c
+++ b/src/mesa/drivers/dri/i965/brw_vtbl.c
@@ -136,6 +136,16 @@ static void brw_invalidate_state( struct intel_context *intel, GLuint new_state
    /* nothing */
 }
 
+/**
+ * \see intel_context.vtbl.is_hiz_depth_format
+ */
+static bool brw_is_hiz_depth_format(struct intel_context *intel,
+                                    gl_format format)
+{
+   /* In the future, this will support Z_FLOAT32. */
+   return intel->has_hiz && (format == MESA_FORMAT_X8_Z24);
+}
+
 
 void brwInitVtbl( struct brw_context *brw )
 {
@@ -152,4 +162,5 @@ void brwInitVtbl( struct brw_context *brw )
    brw->intel.vtbl.set_draw_region = brw_set_draw_region;
    brw->intel.vtbl.debug_batch = brw_debug_batch;
    brw->intel.vtbl.render_target_supported = brw_render_target_supported;
+   brw->intel.vtbl.is_hiz_depth_format = brw_is_hiz_depth_format;
 }