ShareableBitmapCG.cpp [plain text]
#include "config.h"
#include "ShareableBitmap.h"
#include <WebCore/BitmapImage.h>
#include <WebCore/GraphicsContext.h>
#include <wtf/RetainPtr.h>
#include "CGUtilities.h"
using namespace WebCore;
namespace WebKit {
static CGBitmapInfo bitmapInfo(ShareableBitmap::Flags flags)
{
CGBitmapInfo info = kCGBitmapByteOrder32Host;
if (flags & ShareableBitmap::SupportsAlpha)
info |= kCGImageAlphaPremultipliedFirst;
else
info |= kCGImageAlphaNoneSkipFirst;
return info;
}
std::unique_ptr<GraphicsContext> ShareableBitmap::createGraphicsContext()
{
RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());
ref(); RetainPtr<CGContextRef> bitmapContext = adoptCF(CGBitmapContextCreateWithData(data(),
m_size.width(), m_size.height(), 8, m_size.width() * 4, colorSpace.get(),
bitmapInfo(m_flags), releaseBitmapContextData, this));
CGContextTranslateCTM(bitmapContext.get(), 0, m_size.height());
CGContextScaleCTM(bitmapContext.get(), 1, -1);
return std::make_unique<GraphicsContext>(bitmapContext.get());
}
void ShareableBitmap::paint(WebCore::GraphicsContext& context, const IntPoint& destination, const IntRect& source)
{
paintImage(context.platformContext(), makeCGImageCopy().get(), 1, destination, source);
}
void ShareableBitmap::paint(WebCore::GraphicsContext& context, float scaleFactor, const IntPoint& destination, const IntRect& source)
{
paintImage(context.platformContext(), makeCGImageCopy().get(), scaleFactor, destination, source);
}
RetainPtr<CGImageRef> ShareableBitmap::makeCGImageCopy()
{
auto graphicsContext = createGraphicsContext();
RetainPtr<CGImageRef> image = adoptCF(CGBitmapContextCreateImage(graphicsContext->platformContext()));
return image;
}
RetainPtr<CGImageRef> ShareableBitmap::makeCGImage()
{
ref(); RetainPtr<CGDataProvider> dataProvider = adoptCF(CGDataProviderCreateWithData(this, data(), sizeInBytes(), releaseDataProviderData));
return createCGImage(dataProvider.get());
}
RetainPtr<CGImageRef> ShareableBitmap::createCGImage(CGDataProviderRef dataProvider) const
{
ASSERT_ARG(dataProvider, dataProvider);
RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());
RetainPtr<CGImageRef> image = adoptCF(CGImageCreate(m_size.width(), m_size.height(), 8, 32, m_size.width() * 4, colorSpace.get(), bitmapInfo(m_flags), dataProvider, 0, false, kCGRenderingIntentDefault));
return image;
}
void ShareableBitmap::releaseBitmapContextData(void* typelessBitmap, void* typelessData)
{
ShareableBitmap* bitmap = static_cast<ShareableBitmap*>(typelessBitmap);
ASSERT_UNUSED(typelessData, bitmap->data() == typelessData);
bitmap->deref(); }
void ShareableBitmap::releaseDataProviderData(void* typelessBitmap, const void* typelessData, size_t)
{
ShareableBitmap* bitmap = static_cast<ShareableBitmap*>(typelessBitmap);
ASSERT_UNUSED(typelessData, bitmap->data() == typelessData);
bitmap->deref(); }
PassRefPtr<Image> ShareableBitmap::createImage()
{
RetainPtr<CGImageRef> platformImage = makeCGImage();
if (!platformImage)
return nullptr;
return BitmapImage::create(platformImage.get());
}
}