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iOS: add helper to convert UIImage to QImage 

Going through the UIImage.CGImage flattens the image to monochrome.

Change-Id: If74c33badb4e94253b3bf21b6d69bb9f521d6bff
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
bb10
Volker Hilsheimer 2023-11-16 17:10:50 +01:00
parent 54656da9ac
commit 4373c4436a
2 changed files with 30 additions and 3 deletions
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18
src/gui/painting/qcoregraphics.mm
View File

@ -182,6 +182,24 @@ QPixmap qt_mac_toQPixmap(const NSImage *image, const QSizeF &size)
#endif // Q_OS_MACOS
#ifdef Q_OS_IOS
QImage qt_mac_toQImage(const UIImage *image, QSizeF size)
{
QImage ret(size.width(), size.height(), QImage::Format_ARGB32_Premultiplied);
ret.fill(Qt::transparent);
QMacCGContext ctx(&ret);
if (!ctx)
return QImage();
UIGraphicsPushContext(ctx);
const CGRect rect = CGRectMake(0, 0, size.width(), size.height());
[image drawInRect:rect];
UIGraphicsPopContext();
return ret;
}
#endif // Q_OS_IOS
// ---------------------- Colors and Brushes ----------------------
QColor qt_mac_toQColor(CGColorRef color)

15
src/gui/painting/qcoregraphics_p.h
View File

@ -23,15 +23,24 @@
#include <CoreGraphics/CoreGraphics.h>
#if defined(__OBJC__) && defined(Q_OS_MACOS)
#include <AppKit/AppKit.h>
#define HAVE_APPKIT
#if defined(__OBJC__)
# if defined(Q_OS_MACOS)
# include <AppKit/AppKit.h>
# define HAVE_APPKIT
# elif defined(Q_OS_IOS)
# include <UIKit/UIKit.h>
# define HAVE_UIKIT
# endif
#endif
QT_BEGIN_NAMESPACE
Q_GUI_EXPORT CGBitmapInfo qt_mac_bitmapInfoForImage(const QImage &image);
#ifdef HAVE_UIKIT
Q_GUI_EXPORT QImage qt_mac_toQImage(const UIImage *image, QSizeF size);
#endif
#ifdef HAVE_APPKIT
Q_GUI_EXPORT QPixmap qt_mac_toQPixmap(const NSImage *image, const QSizeF &size);