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// Copyright (c) 2011 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 "base/logging.h"
#include "build/build_config.h"
#include "skia/ext/bitmap_platform_device.h"
#include "skia/ext/platform_device.h"
#include "third_party/skia/include/core/SkMetaData.h"
#include "third_party/skia/include/core/SkTypes.h"
namespace {
#if defined(OS_MACOSX)
const char kIsPreviewMetafileKey[] = "CrIsPreviewMetafile";
void SetBoolMetaData(const SkCanvas& canvas, const char* key, bool value) {
SkMetaData& meta = skia::GetMetaData(canvas);
meta.setBool(key, value);
}
bool GetBoolMetaData(const SkCanvas& canvas, const char* key) {
bool value;
SkMetaData& meta = skia::GetMetaData(canvas);
if (!meta.findBool(key, &value))
value = false;
return value;
}
#endif
} // namespace
namespace skia {
SkBaseDevice* GetTopDevice(const SkCanvas& canvas) {
return canvas.getTopDevice(true);
}
SkBitmap ReadPixels(SkCanvas* canvas) {
SkBitmap bitmap;
bitmap.setInfo(canvas->imageInfo());
canvas->readPixels(&bitmap, 0, 0);
return bitmap;
}
bool GetWritablePixels(SkCanvas* canvas, SkPixmap* result) {
if (!canvas || !result) {
return false;
}
SkImageInfo info;
size_t row_bytes;
void* pixels = canvas->accessTopLayerPixels(&info, &row_bytes);
if (!pixels) {
result->reset();
return false;
}
result->reset(info, pixels, row_bytes);
return true;
}
bool SupportsPlatformPaint(const SkCanvas* canvas) {
PlatformDevice* platform_device = GetPlatformDevice(GetTopDevice(*canvas));
return platform_device && platform_device->SupportsPlatformPaint();
}
PlatformSurface BeginPlatformPaint(SkCanvas* canvas) {
PlatformDevice* platform_device = GetPlatformDevice(GetTopDevice(*canvas));
if (platform_device)
return platform_device->BeginPlatformPaint();
return 0;
}
void EndPlatformPaint(SkCanvas* canvas) {
PlatformDevice* platform_device = GetPlatformDevice(GetTopDevice(*canvas));
if (platform_device)
platform_device->EndPlatformPaint();
}
size_t PlatformCanvasStrideForWidth(unsigned width) {
return 4 * width;
}
SkCanvas* CreateCanvas(const skia::RefPtr<SkBaseDevice>& device, OnFailureType failureType) {
if (!device) {
if (CRASH_ON_FAILURE == failureType)
SK_CRASH();
return nullptr;
}
return new SkCanvas(device.get());
}
SkMetaData& GetMetaData(const SkCanvas& canvas) {
SkBaseDevice* device = canvas.getDevice();
DCHECK(device != nullptr);
return device->getMetaData();
}
#if defined(OS_MACOSX)
void SetIsPreviewMetafile(const SkCanvas& canvas, bool is_preview) {
SetBoolMetaData(canvas, kIsPreviewMetafileKey, is_preview);
}
bool IsPreviewMetafile(const SkCanvas& canvas) {
return GetBoolMetaData(canvas, kIsPreviewMetafileKey);
}
CGContextRef GetBitmapContext(const SkCanvas& canvas) {
SkBaseDevice* device = GetTopDevice(canvas);
PlatformDevice* platform_device = GetPlatformDevice(device);
return platform_device ? platform_device->GetBitmapContext() :
nullptr;
}
#endif
} // namespace skia
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