BitmapImageSingleFrameSkia.h   [plain text]

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#ifndef BitmapImageSingleFrameSkia_h
#define BitmapImageSingleFrameSkia_h

#include "Image.h"
#include "NativeImageSkia.h"

namespace WebCore {

// This image class can be used in places which need an Image, but have
// raw pixel data rather than undecoded image data.
// The Image is simpler than a BitmapImage, as it does not have image
// observers, animation, multiple frames, or non-decoded data.
// Therefore trimming the decoded data (destroyDecodedData()) has no effect.
//
// The difficulty with putting this in BitmapImage::create(NativeImagePtr)
// is that NativeImagePtr = NativeImageSkia, yet callers have SkBitmap.
class BitmapImageSingleFrameSkia : public Image {
public:
    // Creates a new Image from the given SkBitmap.  If "copyPixels" is true, a
    // deep copy is done.  Otherwise, a shallow copy is done (pixel data is
    // ref'ed).
    static PassRefPtr<BitmapImageSingleFrameSkia> create(const SkBitmap&, bool copyPixels);

    virtual bool isBitmapImage() const;

    virtual bool currentFrameHasAlpha();

    virtual IntSize size() const;

    // Do nothing, as we only have the one representation of data (decoded).
    virtual void destroyDecodedData(bool destroyAll = true);

    virtual unsigned decodedSize() const;

    // We only have a single frame.
    virtual NativeImagePtr nativeImageForCurrentFrame();

#if !ASSERT_DISABLED
    virtual bool notSolidColor();
#endif

protected:
    virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, ColorSpace styleColorSpace, CompositeOperator);

private:
    NativeImageSkia m_nativeImage;

    // Creates a new Image from the given SkBitmap, using a shallow copy.
    explicit BitmapImageSingleFrameSkia(const SkBitmap&);
};

FloatRect normalizeRect(const FloatRect&);

} // namespace WebCore

#endif  // BitmapImageSingleFrameSkia_h