[Mesa-stable] [PATCH] i965: Fix z_offset computation in intel_miptree_unmap_depthstencil()

[Anuj Phogat]

The bug is triggered by using glTexSubImage2d() with GL_DEPTH_STENCIL
as base internal format and non-zero x, y offsets. Currently x, y
offsets are ignored while updating the texture image.

Fixes Khronos GLES3 CTS tests:
npot_tex_sub_image_2d
npot_tex_sub_image_3d
npot_pbo_tex_sub_image_2d
npot_pbo_tex_sub_image_2d

Cc: <mesa-stable at lists.freedesktop.org>
Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
---
 src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index 2ab0faa..b36ffc7 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -2129,9 +2129,9 @@ intel_miptree_unmap_depthstencil(struct brw_context *brw,
 						 x + s_image_x + map->x,
 						 y + s_image_y + map->y,
 						 brw->has_swizzling);
-	    ptrdiff_t z_offset = ((y + z_image_y) *
+	    ptrdiff_t z_offset = ((y + z_image_y + map->y) *
                                   (z_mt->pitch / 4) +
-				  (x + z_image_x));
+				  (x + z_image_x + map->x));
 
 	    if (map_z32f_x24s8) {
 	       z_map[z_offset] = packed_map[(y * map->w + x) * 2 + 0];
-- 
1.9.3