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// 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()
: SkCanvas(SkNEW(BitmapPlatformDeviceFactory)) {
}
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();
}
PlatformDevice::PlatformSurface BeginPlatformPaint(SkCanvas* canvas) {
return GetTopPlatformDevice(canvas)->BeginPlatformPaint();
}
void EndPlatformPaint(SkCanvas* canvas) {
GetTopPlatformDevice(canvas)->EndPlatformPaint();
}
} // namespace skia
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