[Mesa-dev] [PATCH 1/2] i965: Fix miptree layout for EGLImage-based renderbuffers

[Chad Versace]

When glEGLImageTargetRenderbufferStorageOES() was given an EGLImage
created from the non-base slice of a miptree,
intel_image_target_renderbuffer_storage() forgot to apply the intra-tile
offsets __DRIimage::tile_x,tile_y to the miptree layout.

This patch fixes the problem with a quick hack suitable for
cherry-picking. A proper fix requires more thorough plumbing in
intel_miptree_create_layout() and brw_tex_layout().

Patch 1/2 that fixes test
'dEQP-EGL.functional.image.create.gles2_cubemap_*'.

Reported-by: Haixia Shi <hshi at chromium.org>
Diagnosed-by: Haixia Shi <hshi at chromium.org>
Cc: Jason Ekstrand <jason at jlekstrand.net>
Cc: Mark Janes <mark.a.janes at intel.com>
Cc: mesa-stable at lists.freedesktop.org
Change-Id: I8a64b0048a1ee9e714ebb3f33fffd8334036450b
---
 src/mesa/drivers/dri/i965/intel_fbo.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/intel_fbo.c b/src/mesa/drivers/dri/i965/intel_fbo.c
index 707a9d2..c4a5048 100644
--- a/src/mesa/drivers/dri/i965/intel_fbo.c
+++ b/src/mesa/drivers/dri/i965/intel_fbo.c
@@ -374,6 +374,19 @@ intel_image_target_renderbuffer_storage(struct gl_context *ctx,
    if (!irb->mt)
       return;
 
+   /* Adjust the miptree's upper-left coordinate.
+    *
+    * FIXME: Adjusting the miptree's layout outside of
+    * intel_miptree_create_layout() is fragile. Plumb the adjustment through
+    * intel_miptree_create_layout() and brw_tex_layout().
+    */
+   irb->mt->level[0].level_x = image->tile_x;
+   irb->mt->level[0].level_y = image->tile_y;
+   irb->mt->level[0].slice[0].x_offset = image->tile_x;
+   irb->mt->level[0].slice[0].y_offset = image->tile_y;
+   irb->mt->total_width += image->tile_x;
+   irb->mt->total_height += image->tile_y;
+
    rb->InternalFormat = image->internal_format;
    rb->Width = image->width;
    rb->Height = image->height;
-- 
2.9.2