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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_mac.h"
#include "skia/ext/bitmap_platform_device_mac.h"
#include "third_party/skia/include/core/SkTypes.h"
namespace skia {
PlatformCanvasMac::PlatformCanvasMac() : SkCanvas() {
}
PlatformCanvasMac::PlatformCanvasMac(int width, int height, bool is_opaque)
: SkCanvas() {
initialize(width, height, is_opaque);
}
PlatformCanvasMac::PlatformCanvasMac(int width,
int height,
bool is_opaque,
CGContextRef context)
: SkCanvas() {
initialize(width, height, is_opaque);
}
PlatformCanvasMac::PlatformCanvasMac(int width,
int height,
bool is_opaque,
uint8_t* data)
: SkCanvas() {
initialize(width, height, is_opaque, data);
}
PlatformCanvasMac::~PlatformCanvasMac() {
}
bool PlatformCanvasMac::initialize(int width,
int height,
bool is_opaque) {
SkDevice* device = createPlatformDevice(width, height, is_opaque, NULL);
if (!device)
return false;
setDevice(device);
device->unref(); // was created with refcount 1, and setDevice also refs
return true;
}
bool PlatformCanvasMac::initialize(int width,
int height,
bool is_opaque,
uint8_t* data) {
CGContextRef context = NULL;
CGColorSpaceRef colorSpace;
colorSpace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
context = CGBitmapContextCreate(
data, width, height, 8 /* bits per plane */, 4 * width /* stride */,
colorSpace, kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host);
CGColorSpaceRelease(colorSpace);
if (!context)
return false;
// Change the coordinate system to match WebCore's
CGContextTranslateCTM(context, 0, height);
CGContextScaleCTM(context, 1.0, -1.0);
SkDevice* device = createPlatformDevice(width, height, is_opaque, context);
if (!device)
return false;
setDevice(device);
device->unref(); // was created with refcount 1, and setDevice also refs
return true;
}
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());
}
SkDevice* PlatformCanvasMac::createDevice(SkBitmap::Config config,
int width,
int height,
bool is_opaque, bool isForLayer) {
SkASSERT(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&) {
SkASSERT(false);
return NULL;
}
// static
size_t PlatformCanvasMac::StrideForWidth(unsigned width) {
return 4 * width;
}
} // namespace skia
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