Removal of dependencies on PlatformDevice classes.

skia/ext/platform_canvas.cc

 // Copyright (c) 2006-2008 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 "skia/ext/platform_canvas.h"
 
 #include "skia/ext/bitmap_platform_device.h"
 #include "third_party/skia/include/core/SkTypes.h"
 
-namespace {
-skia::PlatformDevice* GetTopPlatformDevice(const SkCanvas* canvas) {
-  // All of our devices should be our special PlatformDevice.
-  SkCanvas::LayerIter iter(const_cast<SkCanvas*>(canvas), false);
-  return static_cast<skia::PlatformDevice*>(iter.device());
-}
-}
-
 namespace skia {
 
 PlatformCanvas::PlatformCanvas() {
   setDeviceFactory(SkNEW(BitmapPlatformDeviceFactory))->unref();
 }
 
 PlatformCanvas::PlatformCanvas(SkDeviceFactory* factory) : SkCanvas(factory) {
 }
 
 SkDevice* PlatformCanvas::setBitmapDevice(const SkBitmap&) {
   SkASSERT(false);  // Should not be called.
   return NULL;
 }
 
-PlatformDevice& PlatformCanvas::getTopPlatformDevice() const {
-  return *GetTopPlatformDevice(this);
-}
-
 // static
 size_t PlatformCanvas::StrideForWidth(unsigned width) {
   return 4 * width;
 }
 
 bool PlatformCanvas::initializeWithDevice(SkDevice* device) {
   if (!device)
     return false;
 
   setDevice(device);
   device->unref();  // Was created with refcount 1, and setDevice also refs.
   return true;
 }
 
 SkCanvas* CreateBitmapCanvas(int width, int height, bool is_opaque) {
   return new PlatformCanvas(width, height, is_opaque);
 }
 
-bool SupportsPlatformPaint(const SkCanvas* canvas) {
-  // TODO(alokp): Rename PlatformDevice::IsNativeFontRenderingAllowed after
-  // removing these calls from WebKit.
-  return GetTopPlatformDevice(canvas)->IsNativeFontRenderingAllowed();
+SkDevice* GetTopDevice(const SkCanvas& canvas) {
+  SkCanvas::LayerIter iter(const_cast<SkCanvas*>(&canvas), false);
+  return iter.device();
 }
 
-PlatformDevice::PlatformSurface BeginPlatformPaint(SkCanvas* canvas) {
-  return GetTopPlatformDevice(canvas)->BeginPlatformPaint();
+bool SupportsPlatformPaint(const SkCanvas* canvas) {
+  // TODO(alokp): Rename IsNativeFontRenderingAllowed after removing these
+  // calls from WebKit.
+  return IsNativeFontRenderingAllowed(GetTopDevice(*canvas));
+}
+
+PlatformSurface BeginPlatformPaint(SkCanvas* canvas) {
+  return BeginPlatformPaint(GetTopDevice(*canvas));
 }
 
 void EndPlatformPaint(SkCanvas* canvas) {
-  GetTopPlatformDevice(canvas)->EndPlatformPaint();
+  EndPlatformPaint(GetTopDevice(*canvas));
+}
+
+void DrawToNativeContext(SkCanvas* canvas, PlatformSurface context, int x,
+                         int y, const PlatformRect* src_rect) {
+  DrawToNativeContext(GetTopDevice(*canvas), context, x, y, src_rect);
+}
+
+void MakeOpaque(SkCanvas* canvas, int x, int y, int width, int height) {
+  MakeOpaque(GetTopDevice(*canvas), x, y, width, height);
 }
 
 }  // namespace skia