i965/miptree: Add support for imported bo offsets for isl based

Reviewed-by: Jason Ekstrand <[email protected]>
Signed-off-by: Topi Pohjolainen <[email protected]>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index c2d5eafa510..619b00567ed 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -1453,9 +1453,22 @@ intel_miptree_get_image_offset(const struct intel_mipmap_tree *mt,
 			       GLuint level, GLuint slice,
 			       GLuint *x, GLuint *y)
 {
+   if (level == 0 && slice == 0) {
+      *x = mt->level[0].level_x;
+      *y = mt->level[0].level_y;
+      return;
+   }
+
    if (mt->surf.size > 0) {
       uint32_t x_offset_sa, y_offset_sa;
 
+      /* Miptree itself can have an offset only if it represents a single
+       * slice in an imported buffer object.
+       * See intel_miptree_create_for_dri_image().
+       */
+      assert(mt->level[0].level_x == 0);
+      assert(mt->level[0].level_y == 0);
+
       /* Given level is relative to level zero while the miptree may be
        * represent just a subset of all levels starting from 'first_level'.
        */