[Mesa-stable] [PATCH] meta: Fix BlitFramebuffer temp texture setup

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Pass the correct src coordinates to CopyTexSubImage()
when creating the temporary texture, and also take care to adjust
flipX/Y if the original src coordinates were flipped compared to
the new temporary texture src coordinates.

This fixes all the flip_src_x/y tests in
piglit.spec.arb_framebuffer_object.fbo-blit-stretch on i915, but
we're still left with the some failures in the stretch tests.

It looks to me like commit b702233f53d6 ("meta: Refactor the
BlitFramebuffer color CopyTexImage fallback.") most likely
broke this codepath.

Cc: mesa-stable at lists.freedesktop.org
Cc: Eric Anholt <eric at anholt.net>
Cc: Kenneth Graunke <kenneth at whitecape.org>
Cc: Ian Romanick <ian.d.romanick at intel.com>
Cc: Anuj Phogat <anuj.phogat at gmail.com>
Fixes: b702233f53d6 ("meta: Refactor the BlitFramebuffer color CopyTexImage fallback.")
References: https://bugs.freedesktop.org/show_bug.cgi?id=101414
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 src/mesa/drivers/common/meta_blit.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/common/meta_blit.c b/src/mesa/drivers/common/meta_blit.c
index 7adad469aceb..7262ecdfaf13 100644
--- a/src/mesa/drivers/common/meta_blit.c
+++ b/src/mesa/drivers/common/meta_blit.c
@@ -680,12 +680,16 @@ blitframebuffer_texture(struct gl_context *ctx,
       }
 
       _mesa_meta_setup_copypix_texture(ctx, meta_temp_texture,
-                                       srcX0, srcY0,
+                                       MIN2(srcX0, srcX1),
+                                       MIN2(srcY0, srcY1),
                                        srcW, srcH,
                                        tex_base_format,
                                        filter);
 
-
+      if (srcX0 > srcX1)
+         flipX = -flipX;
+      if (srcY0 > srcY1)
+         flipY = -flipY;
       srcX0 = 0;
       srcY0 = 0;
       srcX1 = srcW;
-- 
2.13.0