intel/isl: Add a helper for getting the byte/tile offset of a subimage

Frequently, get_image_offset_sa is combined with get_intratile_offset_sa
so it makes sense to have a single helper to do both.  If the caller
doesn't want the intratile offsets, it can simply pass NULL and ISL will
assert that they are 0.

Reviewed-by: Topi Pohjolainen <[email protected]>

1 files changed, 21 insertions, 0 deletions

diff --git a/src/intel/isl/isl.h b/src/intel/isl/isl.h
index 8b2d264f8b2..658f67e4ae3 100644
--- a/src/intel/isl/isl.h
+++ b/src/intel/isl/isl.h
@@ -1590,6 +1590,27 @@ isl_surf_get_image_offset_el(const struct isl_surf *surf,
                              uint32_t *y_offset_el);
 
 /**
+ * Calculate the offset, in bytes and intratile surface samples, to a
+ * subimage in the surface.
+ *
+ * This is equivalent to calling isl_surf_get_image_offset_el, passing the
+ * result to isl_tiling_get_intratile_offset_el, and converting the tile
+ * offsets to samples.
+ *
+ * @invariant level < surface levels
+ * @invariant logical_array_layer < logical array length of surface
+ * @invariant logical_z_offset_px < logical depth of surface at level
+ */
+void
+isl_surf_get_image_offset_B_tile_sa(const struct isl_surf *surf,
+                                    uint32_t level,
+                                    uint32_t logical_array_layer,
+                                    uint32_t logical_z_offset_px,
+                                    uint32_t *offset_B,
+                                    uint32_t *x_offset_sa,
+                                    uint32_t *y_offset_sa);
+
+/**
  * @brief Calculate the intratile offsets to a surface.
  *
  * In @a base_address_offset return the offset from the base of the surface to