gallium/u_blitter: add helper for blitting via resource_copy_region

v2: fix off-by-one error in is_box_inside_resource, add comments

Reviewed-by: Brian Paul <[email protected]>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_blitter.h b/src/gallium/auxiliary/util/u_blitter.h
index 026e88b5154..40636c61619 100644
--- a/src/gallium/auxiliary/util/u_blitter.h
+++ b/src/gallium/auxiliary/util/u_blitter.h
@@ -142,6 +142,18 @@ void util_blitter_draw_rectangle(struct blitter_context *blitter,
                                  enum blitter_attrib_type type,
                                  const union pipe_color_union *attrib);
 
+/**
+ * Try to do a blit using resource_copy_region. The function calls
+ * resource_copy_region if the blit description is compatible with it.
+ *
+ * It returns TRUE if the blit was done using resource_copy_region.
+ *
+ * It returns FALSE otherwise and the caller must fall back to a more generic
+ * codepath for the blit operation. (e.g. by using u_blitter)
+ */
+boolean util_try_blit_via_copy_region(struct pipe_context *ctx,
+                                      const struct pipe_blit_info *blit);
+
 /*
  * These states must be saved before any of the following functions are called:
  * - vertex buffers