i965: Add helper functions to calculate the slice pitch of an array or 3D miptree.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
index 77b029452b4..8b42e4adb79 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
@@ -735,6 +735,24 @@ intel_miptree_updownsample(struct brw_context *brw,
                            struct intel_mipmap_tree *src,
                            struct intel_mipmap_tree *dst);
 
+/**
+ * Horizontal distance from one slice to the next in the two-dimensional
+ * miptree layout.
+ */
+unsigned
+brw_miptree_get_horizontal_slice_pitch(const struct brw_context *brw,
+                                       const struct intel_mipmap_tree *mt,
+                                       unsigned level);
+
+/**
+ * Vertical distance from one slice to the next in the two-dimensional miptree
+ * layout.
+ */
+unsigned
+brw_miptree_get_vertical_slice_pitch(const struct brw_context *brw,
+                                     const struct intel_mipmap_tree *mt,
+                                     unsigned level);
+
 void brw_miptree_layout(struct brw_context *brw, struct intel_mipmap_tree *mt);
 
 void *intel_miptree_map_raw(struct brw_context *brw,