DragImageChromiumMac.cpp [plain text]
#include "config.h"
#include "DragImage.h"
#include "Image.h"
#include "NotImplemented.h"
#include <wtf/RetainPtr.h>
#include <CoreGraphics/CGBitmapContext.h>
#include <CoreGraphics/CGImage.h>
namespace WebCore {
IntSize dragImageSize(DragImageRef image)
{
if (!image)
return IntSize();
return IntSize(CGImageGetWidth(image), CGImageGetHeight(image));
}
void deleteDragImage(DragImageRef image)
{
CGImageRelease(image);
}
DragImageRef scaleDragImage(DragImageRef image, FloatSize scale)
{
if (!image)
return 0;
size_t width = roundf(CGImageGetWidth(image) * scale.width());
size_t height = roundf(CGImageGetHeight(image) * scale.height());
RetainPtr<CGColorSpaceRef> deviceRGB(WTF::AdoptCF, CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB));
CGContextRef context = CGBitmapContextCreate(0, width, height, 8, width * 4, deviceRGB.get(), kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host);
if (!context)
return 0;
CGContextDrawImage(context, CGRectMake(0, 0, width, height), image);
CGImageRelease(image);
CGImageRef scaledImage = CGBitmapContextCreateImage(context);
CGContextRelease(context);
return scaledImage;
}
DragImageRef dissolveDragImageToFraction(DragImageRef image, float delta)
{
if (!image)
return 0;
size_t width = CGImageGetWidth(image);
size_t height = CGImageGetHeight(image);
RetainPtr<CGColorSpaceRef> deviceRGB(WTF::AdoptCF, CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB));
CGContextRef context = CGBitmapContextCreate(0, width, height, 8, width * 4, deviceRGB.get(), kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host);
if (!context)
return 0;
CGContextSetAlpha(context, delta);
CGContextSetBlendMode(context, kCGBlendModeNormal);
CGContextDrawImage(context, CGRectMake(0, 0, width, height), image);
CGImageRelease(image);
CGImageRef dissolvedImage = CGBitmapContextCreateImage(context);
CGContextRelease(context);
return dissolvedImage;
}
DragImageRef createDragImageFromImage(Image* image, RespectImageOrientationEnum)
{
if (!image)
return 0;
return CGImageCreateCopy(image->nativeImageForCurrentFrame());
}
DragImageRef createDragImageIconForCachedImage(CachedImage*)
{
notImplemented();
return 0;
}
}