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| |
| #include "qimage.h" |
| |
| #include <private/qcore_mac_p.h> |
| #include <private/qcoregraphics_p.h> |
| |
| #import <Foundation/Foundation.h> |
| #import <CoreGraphics/CoreGraphics.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| /*! |
| Creates a \c CGImage equivalent to this QImage. Returns a |
| \c CGImageRef handle. |
| |
| The returned CGImageRef partakes in the QImage implicit sharing, |
| and holds a reference to the QImage data. CGImage is immutable |
| and will never detach the QImage. Writing to the QImage will detach |
| as usual. |
| |
| This function is fast, and does not copy or convert image data. |
| |
| The following image formats are supported, and will be mapped to |
| a corresponding native image type: |
| |
| \table |
| \header |
| \li Qt |
| \li CoreGraphics |
| \row |
| \li Format_ARGB32 |
| \li kCGImageAlphaFirst | kCGBitmapByteOrder32Host |
| \row |
| \li Format_RGB32 |
| \li kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Host |
| \row |
| \li Format_RGBA8888_Premultiplied |
| \li kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big |
| \row |
| \li Format_RGBA8888 |
| \li kCGImageAlphaLast | kCGBitmapByteOrder32Big |
| \row |
| \li Format_RGBX8888 |
| \li kCGImageAlphaNoneSkipLast | kCGBitmapByteOrder32Big |
| \row |
| \li Format_ARGB32_Premultiplied |
| \li kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host |
| \endtable |
| |
| Other formats are not supported; this function returns a null |
| CGImageRef for those cases. Users of this function may then |
| convert the QImage to a supported formate first, for example |
| Format_ARGB32_Premultiplied. |
| |
| The CGImageRef color space is set to the sRGB color space. |
| |
| \sa QtMac::toNSImage() |
| */ |
| CGImageRef QImage::toCGImage() const |
| { |
| if (isNull()) |
| return nil; |
| |
| CGBitmapInfo bitmapInfo = qt_mac_bitmapInfoForImage(*this); |
| |
| // Format not supported: return nil CGImageRef |
| if (bitmapInfo == kCGImageAlphaNone) |
| return nil; |
| |
| // Create a data provider that owns a copy of the QImage and references the image data. |
| auto deleter = [](void *image, const void *, size_t) |
| { delete static_cast<QImage *>(image); }; |
| QCFType<CGDataProviderRef> dataProvider = |
| CGDataProviderCreateWithData(new QImage(*this), bits(), sizeInBytes(), deleter); |
| |
| QCFType<CGColorSpaceRef> colorSpace = CGColorSpaceCreateWithName(kCGColorSpaceSRGB); |
| |
| const size_t bitsPerComponent = 8; |
| const size_t bitsPerPixel = 32; |
| const CGFloat *decode = nullptr; |
| const bool shouldInterpolate = false; |
| |
| return CGImageCreate(width(), height(), bitsPerComponent, bitsPerPixel, |
| this->bytesPerLine(), colorSpace, bitmapInfo, dataProvider, |
| decode, shouldInterpolate, kCGRenderingIntentDefault); |
| } |
| |
| QT_END_NAMESPACE |