Add flag for drawing layers to screen with Ganesh

ui/gfx/skia_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/skia_util.h"
 
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkColorFilter.h"
 #include "third_party/skia/include/core/SkColorPriv.h"
 #include "third_party/skia/include/core/SkUnPreMultiply.h"
 #include "third_party/skia/include/effects/SkBlurMaskFilter.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
 #include "third_party/skia/include/effects/SkLayerDrawLooper.h"
 #include "ui/gfx/image/image_skia_rep.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/rect_f.h"
 #include "ui/gfx/shadow_value.h"
+#include "ui/gfx/transform.h"
 
 namespace gfx {
 
 SkRect RectToSkRect(const Rect& rect) {
   SkRect r;
   r.iset(rect.x(), rect.y(), rect.right(), rect.bottom());
   return r;
 }
 
 SkIRect RectToSkIRect(const Rect& rect) {
@@ skipping 11 matching lines @@
                           SkFloatToScalar(rect.height()));
 }
 
 RectF SkRectToRectF(const SkRect& rect) {
   return RectF(SkScalarToFloat(rect.x()),
                SkScalarToFloat(rect.y()),
                SkScalarToFloat(rect.width()),
                SkScalarToFloat(rect.height()));
 }
 
+void TransformToFlattenedSkMatrix(const gfx::Transform& transform,
+                                  SkMatrix* flattened) {
+  // Convert from 4x4 to 3x3 by dropping the third row and column.
+  flattened->set(0, SkDoubleToScalar(transform.matrix().getDouble(0, 0)));
+  flattened->set(1, SkDoubleToScalar(transform.matrix().getDouble(0, 1)));
+  flattened->set(2, SkDoubleToScalar(transform.matrix().getDouble(0, 3)));
+  flattened->set(3, SkDoubleToScalar(transform.matrix().getDouble(1, 0)));
+  flattened->set(4, SkDoubleToScalar(transform.matrix().getDouble(1, 1)));
+  flattened->set(5, SkDoubleToScalar(transform.matrix().getDouble(1, 3)));
+  flattened->set(6, SkDoubleToScalar(transform.matrix().getDouble(3, 0)));
+  flattened->set(7, SkDoubleToScalar(transform.matrix().getDouble(3, 1)));
+  flattened->set(8, SkDoubleToScalar(transform.matrix().getDouble(3, 3)));
+}
 
 skia::RefPtr<SkShader> CreateImageRepShader(const gfx::ImageSkiaRep& image_rep,
                                             SkShader::TileMode tile_mode,
                                             const SkMatrix& local_matrix) {
   skia::RefPtr<SkShader> shader = skia::AdoptRef(SkShader::CreateBitmapShader(
       image_rep.sk_bitmap(), tile_mode, tile_mode));
   SkScalar scale_x = local_matrix.getScaleX();
   SkScalar scale_y = local_matrix.getScaleY();
   SkScalar bitmap_scale = SkFloatToScalar(image_rep.GetScale());
 
@@ skipping 102 matching lines @@
     } else {
       rgba[i + 0] = SkGetPackedR32(pixel_in);
       rgba[i + 1] = SkGetPackedG32(pixel_in);
       rgba[i + 2] = SkGetPackedB32(pixel_in);
       rgba[i + 3] = alpha;
     }
   }
 }
 
 }  // namespace gfx