经过一整天的搜索,我找到了一些类似的答案,但似乎没有什么对我有用。
我已经构建了一个要在 OSX 中使用的应用程序,它从用户输入的目录中获取图像列表,通过重命名过程运行每个图像,转换为 JPG,并希望在您的帮助下转换为 RGB 颜色。
NSImage *image = [[NSImage alloc] initWithContentsOfFile:from];
NSInteger imageWidth = image.size.width * 4.16666666667;
NSInteger imageHeight = image.size.height * 4.16666666667;
NSBitmapImageRep* theRGBImageRep = [[NSBitmapImageRep alloc]
initWithBitmapDataPlanes:NULL pixelsWide:imageWidth pixelsHigh:imageHeight
bitsPerSample: 8 samplesPerPixel: 4 hasAlpha: YES isPlanar: NO
colorSpaceName: NSCalibratedRGBColorSpace bytesPerRow: 0 bitsPerPixel: 0];
NSGraphicsContext* theContext = [NSGraphicsContext
graphicsContextWithBitmapImageRep: theRGBImageRep];
NSImageRep* theImageRep = [image bestRepresentationForRect:
NSMakeRect(0.0, 0.0, imageWidth, imageHeight) context:theContext
hints:[NSDictionary dictionaryWithObject:NSDeviceRGBColorSpace
forKey:NSDeviceColorSpaceName]];
[NSGraphicsContext saveGraphicsState];
[NSGraphicsContext setCurrentContext: theContext];
NSRect theBoundsRect = NSMakeRect(0.0, 0.0, [theRGBImageRep pixelsWide],
[theRGBImageRep pixelsHigh]);
[[NSColor clearColor] set];
NSRectFill(theBoundsRect);
[theImageRep drawInRect: theBoundsRect];
[NSGraphicsContext restoreGraphicsState];;
[image addRepresentation: theRGBImageRep];
NSDictionary *imageProps = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat:1.0],NSImageCompressionFactor, nil];
NSData *bitmapData = [theRGBImageRep representationUsingType:NSJPEGFileType
properties:imageProps];
if ([bitmapData writeToFile:toJPG atomically:YES] == YES){
feedback = [NSString stringWithFormat:@"%@ -> %@\n", string, jpgFileName];
[readOut insertText:feedback];
[readOut display];
} else {
feedback = [NSString stringWithFormat:@"%@ - FAILED\n", string];
[errorLog insertText:feedback];
[errorLog display];
}
如果图像在指定文件夹中正确输出为 JPEG,但始终保持 CMYK。还有其他人遇到这个吗?
已编辑以显示已清除的结果:
更新的代码(这是当前给出的淘汰结果)