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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 "base/gfx/platform_canvas_mac.h"
#include "base/gfx/bitmap_platform_device_mac.h"
#include "base/logging.h"
namespace gfx {
PlatformCanvasMac::PlatformCanvasMac() : SkCanvas() {
}
PlatformCanvasMac::PlatformCanvasMac(int width, int height, bool is_opaque)
: SkCanvas() {
initialize(width, height, is_opaque, NULL);
}
PlatformCanvasMac::PlatformCanvasMac(int width,
int height,
bool is_opaque,
CGContextRef context)
: SkCanvas() {
initialize(width, height, is_opaque, context);
}
PlatformCanvasMac::~PlatformCanvasMac() {
}
void PlatformCanvasMac::initialize(int width,
int height,
bool is_opaque,
CGContextRef context) {
SkDevice* device =
createPlatformDevice(width, height, is_opaque, context);
setDevice(device);
device->unref(); // was created with refcount 1, and setDevice also refs
}
CGContextRef PlatformCanvasMac::beginPlatformPaint() {
return getTopPlatformDevice().GetBitmapContext();
}
void PlatformCanvasMac::endPlatformPaint() {
// flushing will be done in onAccessBitmap
}
PlatformDeviceMac& PlatformCanvasMac::getTopPlatformDevice() const {
// All of our devices should be our special PlatformDeviceMac.
SkCanvas::LayerIter iter(const_cast<PlatformCanvasMac*>(this), false);
return *static_cast<PlatformDeviceMac*>(iter.device());
}
// Clipping -------------------------------------------------------------------
bool PlatformCanvasMac::clipRect(const SkRect& rect, SkRegion::Op op) {
bool ret = SkCanvas::clipRect(rect, op);
getTopPlatformDevice().SetClipRegion(getTotalClip());
return ret;
}
bool PlatformCanvasMac::clipPath(const SkPath& path, SkRegion::Op op) {
bool ret = SkCanvas::clipPath(path, op);
getTopPlatformDevice().SetClipRegion(getTotalClip());
return ret;
}
bool PlatformCanvasMac::clipRegion(const SkRegion& deviceRgn, SkRegion::Op op) {
bool ret = SkCanvas::clipRegion(deviceRgn, op);
getTopPlatformDevice().SetClipRegion(getTotalClip());
return ret;
}
// Transforming ---------------------------------------------------------------
bool PlatformCanvasMac::translate(SkScalar dx, SkScalar dy) {
if (!SkCanvas::translate(dx, dy))
return false;
getTopPlatformDevice().SetTransform(getTotalMatrix());
return true;
}
bool PlatformCanvasMac::scale(SkScalar sx, SkScalar sy) {
if (!SkCanvas::scale(sx, sy))
return false;
getTopPlatformDevice().SetTransform(getTotalMatrix());
return true;
}
int PlatformCanvasMac::saveLayer(const SkRect* bounds,
const SkPaint* paint,
SaveFlags flags) {
int result = SkCanvas::saveLayer(bounds, paint, flags);
// saveLayer will have created a new device which, depending on the clip
// rect, may be smaller than the original layer. Therefore, it will have a
// transform applied, and we need to sync CG with that transform.
SkCanvas::LayerIter iter(this, false);
PlatformDeviceMac& new_device =
*static_cast<PlatformDeviceMac*>(iter.device());
// There man not actually be a new layer if the layer is empty.
if (!iter.done()) {
new_device.SetDeviceOffset(iter.x(), iter.y());
new_device.SetTransform(getTotalMatrix());
new_device.SetClipRegion(getTotalClip());
}
return result;
}
int PlatformCanvasMac::save(SkCanvas::SaveFlags flags) {
int ret = SkCanvas::save(flags);
PlatformDeviceMac& device = getTopPlatformDevice();
device.SetTransform(getTotalMatrix());
device.SetClipRegion(getTotalClip());
return ret;
}
void PlatformCanvasMac::restore() {
SkCanvas::restore();
PlatformDeviceMac& device = getTopPlatformDevice();
device.SetTransform(getTotalMatrix());
device.SetClipRegion(getTotalClip());
}
SkDevice* PlatformCanvasMac::createDevice(SkBitmap::Config config,
int width,
int height,
bool is_opaque) {
DCHECK(config == SkBitmap::kARGB_8888_Config);
return createPlatformDevice(width, height, is_opaque, NULL);
}
SkDevice* PlatformCanvasMac::createPlatformDevice(int width,
int height,
bool is_opaque,
CGContextRef context) {
SkDevice* device = BitmapPlatformDeviceMac::Create(context, width, height,
is_opaque);
return device;
}
SkDevice* PlatformCanvasMac::setBitmapDevice(const SkBitmap&) {
NOTREACHED();
return NULL;
}
} // namespace gfx
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