[Mesa-dev] [PATCH] i965: Fix glCompressedTexSubImage2D offsets for ETC textures.

[Paul Berry]

This patch fixes intel_miptree_unmap_etc() (which decompresses ETC
textures to linear) to pay attention to map->x and map->y when writing
to the destination image.  Previously these values were ignored,
causing the xoffset and yoffset parameters passed to
glCompressedTexSubImage2D() to be ignored.
---
 src/mesa/drivers/dri/intel/intel_mipmap_tree.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
index 8d814bd..0c8e479 100644
--- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
@@ -1329,6 +1329,9 @@ intel_miptree_unmap_etc(struct intel_context *intel,
    uint32_t image_y;
    intel_miptree_get_image_offset(mt, level, slice, &image_x, &image_y);
 
+   image_x += map->x;
+   image_y += map->y;
+
    uint8_t *dst = intel_region_map(intel, mt->region, map->mode)
                 + image_y * mt->region->pitch * mt->region->cpp
                 + image_x * mt->region->cpp;
-- 
1.8.0.3