ShareableBitmapCairo.cpp [plain text]
#include "config.h"
#include "ShareableBitmap.h"
#include <WebCore/BitmapImage.h>
#include <WebCore/CairoUtilities.h>
#include <WebCore/GraphicsContext.h>
#include <WebCore/PlatformContextCairo.h>
#include <WebCore/NotImplemented.h>
using namespace WebCore;
namespace WebKit {
static const cairo_format_t cairoFormat = CAIRO_FORMAT_ARGB32;
size_t ShareableBitmap::numBytesForSize(const WebCore::IntSize& size)
{
return cairo_format_stride_for_width(cairoFormat, size.width()) * size.height();
}
static inline PassRefPtr<cairo_surface_t> createSurfaceFromData(void* data, const WebCore::IntSize& size)
{
const int stride = cairo_format_stride_for_width(cairoFormat, size.width());
return adoptRef(cairo_image_surface_create_for_data(static_cast<unsigned char*>(data), cairoFormat, size.width(), size.height(), stride));
}
std::unique_ptr<GraphicsContext> ShareableBitmap::createGraphicsContext()
{
RefPtr<cairo_surface_t> image = createCairoSurface();
RefPtr<cairo_t> bitmapContext = adoptRef(cairo_create(image.get()));
return std::make_unique<GraphicsContext>(bitmapContext.get());
}
void ShareableBitmap::paint(GraphicsContext& context, const IntPoint& dstPoint, const IntRect& srcRect)
{
paint(context, 1, dstPoint, srcRect);
}
void ShareableBitmap::paint(GraphicsContext& context, float scaleFactor, const IntPoint& dstPoint, const IntRect& srcRect)
{
RefPtr<cairo_surface_t> surface = createSurfaceFromData(data(), m_size);
FloatRect destRect(dstPoint, srcRect.size());
FloatRect srcRectScaled(srcRect);
srcRectScaled.scale(scaleFactor);
context.platformContext()->drawSurfaceToContext(surface.get(), destRect, srcRectScaled, &context);
}
PassRefPtr<cairo_surface_t> ShareableBitmap::createCairoSurface()
{
RefPtr<cairo_surface_t> image = createSurfaceFromData(data(), m_size);
ref(); static cairo_user_data_key_t dataKey;
cairo_surface_set_user_data(image.get(), &dataKey, this, releaseSurfaceData);
return image.release();
}
void ShareableBitmap::releaseSurfaceData(void* typelessBitmap)
{
static_cast<ShareableBitmap*>(typelessBitmap)->deref(); }
PassRefPtr<Image> ShareableBitmap::createImage()
{
RefPtr<cairo_surface_t> surface = createCairoSurface();
if (!surface)
return 0;
return BitmapImage::create(surface.release());
}
}