Move skia extensions from the port to skia/ext for Windows only. Fixed the

include guards of the moved files, but nothing else.

Review URL: http://codereview.chromium.org/11568

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@5861 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 117 insertions, 0 deletions

diff --git a/skia/ext/platform_canvas_win.cc b/skia/ext/platform_canvas_win.cc
new file mode 100644
index 0000000..e3dffeb7
--- /dev/null
+++ b/skia/ext/platform_canvas_win.cc
@@ -0,0 +1,117 @@
+// 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_win.h"
+
+#include "base/logging.h"
+#include "base/process_util.h"
+#include "skia/ext/bitmap_platform_device_win.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