Move skia extensions from the port to skia/ext.

webkit/port/platform/graphics/skia/public/PlatformCanvasWin.cpp

-// 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 "PlatformCanvasWin.h"
-
-#include "BitmapPlatformDeviceWin.h"
-
-#include "base/logging.h"
-#include "base/process_util.h"
-
-namespace gfx {
-
-// Crashes the process. This is called when a bitmap allocation fails, and this
-// function tries to determine why it might have failed, and crash on different
-// lines. This allows us to see in crash dumps the most likely reason for the
-// failure. It takes the size of the bitmap we were trying to allocate as its
-// arguments so we can check that as well.
-void CrashForBitmapAllocationFailure(int w, int h) {
-  // The maximum number of GDI objects per process is 10K. If we're very close
-  // to that, it's probably the problem.
-  const int kLotsOfGDIObjs = 9990;
-  CHECK(GetGuiResources(GetCurrentProcess(), GR_GDIOBJECTS) < kLotsOfGDIObjs);
-
-  // If the bitmap is ginormous, then we probably can't allocate it.
-  // We use 64M pixels = 256MB @ 4 bytes per pixel.
-  const int64 kGinormousBitmapPxl = 64000000;
-  CHECK(static_cast<int64>(w) * static_cast<int64>(h) < kGinormousBitmapPxl);
-
-  // If we're using a crazy amount of virtual address space, then maybe there
-  // isn't enough for our bitmap.
-  const int64 kLotsOfMem = 1500000000;  // 1.5GB.
-  scoped_ptr<base::ProcessMetrics> process_metrics(
-      base::ProcessMetrics::CreateProcessMetrics(GetCurrentProcess()));
-  CHECK(process_metrics->GetPagefileUsage() < kLotsOfMem);
-
-  // Everything else.
-  CHECK(0);
-}
-
-
-PlatformCanvasWin::PlatformCanvasWin() : SkCanvas() {
-}
-
-PlatformCanvasWin::PlatformCanvasWin(int width, int height, bool is_opaque)
-    : SkCanvas() {
-  bool initialized = initialize(width, height, is_opaque, NULL);
-  if (!initialized)
-    CrashForBitmapAllocationFailure(width, height);
-}
-
-PlatformCanvasWin::PlatformCanvasWin(int width,
-                                     int height,
-                                     bool is_opaque,
-                                     HANDLE shared_section)
-    : SkCanvas() {
-  bool initialized = initialize(width, height, is_opaque, shared_section);
-  if (!initialized)
-    CrashForBitmapAllocationFailure(width, height);
-}
-
-PlatformCanvasWin::~PlatformCanvasWin() {
-}
-
-bool PlatformCanvasWin::initialize(int width,
-                                   int height,
-                                   bool is_opaque,
-                                   HANDLE shared_section) {
-  SkDevice* device =
-      createPlatformDevice(width, height, is_opaque, shared_section);
-  if (!device)
-    return false;
-
-  setDevice(device);
-  device->unref(); // was created with refcount 1, and setDevice also refs
-  return true;
-}
-
-HDC PlatformCanvasWin::beginPlatformPaint() {
-  return getTopPlatformDevice().getBitmapDC();
-}
-
-void PlatformCanvasWin::endPlatformPaint() {
-  // we don't clear the DC here since it will be likely to be used again
-  // flushing will be done in onAccessBitmap
-}
-
-PlatformDeviceWin& PlatformCanvasWin::getTopPlatformDevice() const {
-  // All of our devices should be our special PlatformDevice.
-  SkCanvas::LayerIter iter(const_cast<PlatformCanvasWin*>(this), false);
-  return *static_cast<PlatformDeviceWin*>(iter.device());
-}
-
-SkDevice* PlatformCanvasWin::createDevice(SkBitmap::Config config,
-                                          int width,
-                                          int height,
-                                          bool is_opaque, bool isForLayer) {
-  DCHECK(config == SkBitmap::kARGB_8888_Config);
-  return createPlatformDevice(width, height, is_opaque, NULL);
-}
-
-SkDevice* PlatformCanvasWin::createPlatformDevice(int width,
-                                                  int height,
-                                                  bool is_opaque,
-                                                  HANDLE shared_section) {
-  HDC screen_dc = GetDC(NULL);
-  SkDevice* device = BitmapPlatformDeviceWin::create(screen_dc, width, height,
-                                                  is_opaque, shared_section);
-  ReleaseDC(NULL, screen_dc);
-  return device;
-}
-
-SkDevice* PlatformCanvasWin::setBitmapDevice(const SkBitmap&) {
-  NOTREACHED();
-  return NULL;
-}
-
-}  // namespace gfx