From 6bca62e7c79747089d2f093992a491aba0dbbeff Mon Sep 17 00:00:00 2001
From: Benjamin Stover <bstover@mozilla.com>
Date: Mon, 29 Aug 2011 10:56:50 -0700
Subject: [PATCH] Bug 634759 Allow buffer rotation for mobile r=roc

---
 gfx/layers/basic/BasicLayers.cpp     | 5 +++--
 gfx/layers/opengl/ThebesLayerOGL.cpp | 4 +++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/gfx/layers/basic/BasicLayers.cpp b/gfx/layers/basic/BasicLayers.cpp
index 2cc07308f77..3d8a391ec05 100644
--- a/gfx/layers/basic/BasicLayers.cpp
+++ b/gfx/layers/basic/BasicLayers.cpp
@@ -713,12 +713,13 @@ BasicThebesLayer::PaintThebes(gfxContext* aContext,
 
   {
     PRUint32 flags = 0;
+#ifndef MOZ_GFX_OPTIMIZE_MOBILE
     gfxMatrix transform;
     if (!GetEffectiveTransform().CanDraw2D(&transform) ||
-        transform.HasNonIntegerTranslation() ||
-        MustRetainContent() /*<=> has shadow layer*/) {
+        transform.HasNonIntegerTranslation()) {
       flags |= ThebesLayerBuffer::PAINT_WILL_RESAMPLE;
     }
+#endif
     Buffer::PaintState state =
       mBuffer.BeginPaint(this, contentType, flags);
     mValidRegion.Sub(mValidRegion, state.mRegionToInvalidate);
diff --git a/gfx/layers/opengl/ThebesLayerOGL.cpp b/gfx/layers/opengl/ThebesLayerOGL.cpp
index e8b2687cd1e..23c9ede0f12 100644
--- a/gfx/layers/opengl/ThebesLayerOGL.cpp
+++ b/gfx/layers/opengl/ThebesLayerOGL.cpp
@@ -749,8 +749,9 @@ ThebesLayerOGL::RenderLayer(int aPreviousFrameBuffer,
     CanUseOpaqueSurface() ? gfxASurface::CONTENT_COLOR :
                             gfxASurface::CONTENT_COLOR_ALPHA;
 
-  gfxMatrix transform2d;
   PRUint32 flags = 0;
+#ifndef MOZ_GFX_OPTIMIZE_MOBILE
+  gfxMatrix transform2d;
   if (GetEffectiveTransform().Is2D(&transform2d)) {
     if (transform2d.HasNonIntegerTranslation()) {
       flags |= ThebesLayerBufferOGL::PAINT_WILL_RESAMPLE;
@@ -758,6 +759,7 @@ ThebesLayerOGL::RenderLayer(int aPreviousFrameBuffer,
   } else {
     flags |= ThebesLayerBufferOGL::PAINT_WILL_RESAMPLE;
   }
+#endif
 
   Buffer::PaintState state = mBuffer->BeginPaint(contentType, flags);
   mValidRegion.Sub(mValidRegion, state.mRegionToInvalidate);