PassOwnPtr<GraphicsContext> BackingStore::createGraphicsContext()
{
RetainPtr<CGColorSpaceRef> colorSpace(AdoptCF, CGColorSpaceCreateDeviceRGB());
RetainPtr<CGContextRef> bitmapContext(AdoptCF, CGBitmapContextCreate(data(), m_size.width(), m_size.height(), 8, m_size.width() * 4, colorSpace.get(),
kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host));
// We want the origin to be in the top left corner so flip the backing store context.
CGContextTranslateCTM(bitmapContext.get(), 0, m_size.height());
CGContextScaleCTM(bitmapContext.get(), 1, -1);
return adoptPtr(new GraphicsContext(bitmapContext.get()));
}
void ChunkedUpdateDrawingArea::paintIntoUpdateChunk(UpdateChunk* updateChunk)
{
RetainPtr<CGColorSpaceRef> colorSpace(AdoptCF, CGColorSpaceCreateDeviceRGB());
RetainPtr<CGContextRef> bitmapContext(AdoptCF, CGBitmapContextCreate(updateChunk->data(), updateChunk->rect().width(), updateChunk->rect().height(), 8, updateChunk->rect().width() * 4, colorSpace.get(), kCGImageAlphaPremultipliedLast));
// WebCore expects a flipped coordinate system.
CGContextTranslateCTM(bitmapContext.get(), 0.0, updateChunk->rect().height());
CGContextScaleCTM(bitmapContext.get(), 1.0, -1.0);
// Now paint into the backing store.
GraphicsContext graphicsContext(bitmapContext.get());
graphicsContext.translate(-updateChunk->rect().x(), -updateChunk->rect().y());
m_webPage->drawRect(graphicsContext, updateChunk->rect());
}
PassRefPtr<BitmapImage> BitmapImage::create(HBITMAP hBitmap)
{
DIBSECTION dibSection;
if (!GetObject(hBitmap, sizeof(DIBSECTION), &dibSection))
return 0;
ASSERT(dibSection.dsBm.bmBitsPixel == 32);
if (dibSection.dsBm.bmBitsPixel != 32)
return 0;
ASSERT(dibSection.dsBm.bmBits);
if (!dibSection.dsBm.bmBits)
return 0;
RetainPtr<CGContextRef> bitmapContext(AdoptCF, CGBitmapContextCreate(dibSection.dsBm.bmBits, dibSection.dsBm.bmWidth, dibSection.dsBm.bmHeight, 8,
dibSection.dsBm.bmWidthBytes, deviceRGBColorSpaceRef(), kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst));
// The BitmapImage takes ownership of this.
CGImageRef cgImage = CGBitmapContextCreateImage(bitmapContext.get());
return adoptRef(new BitmapImage(cgImage));
}
