从 HEIF 文件创建 CGImage

Question

这就是我将 JPEG 或 PNG 文件加载到CG图像:

imgDataProvider = CGDataProviderCreateWithFilename( [imgFilepath UTF8String] );

if( [[imgFilepath pathExtension] isEqualToString: @"png"] )
{
    image = CGImageCreateWithPNGDataProvider(imgDataProvider, NULL, true, kCGRenderingIntentDefault);
}
else if( [[imgFilepath pathExtension] isEqualToString: @"jpg"] || [[imgFilepath pathExtension] isEqualToString: @"jpeg"] )
{
    image = CGImageCreateWithJPEGDataProvider(imgDataProvider, NULL, true, kCGRenderingIntentDefault);
}

不幸的是，它不是 CGImageCreateWith... 的变体HEIF

我如何创建一个CG图像来自 HEIF 编码的图像文件？

Answer 1

这比我想象的要容易

imageSrc = CGImageSourceCreateWithURL( (CFURLRef)[NSURL fileURLWithPath:imgFilepath], nil );
image = CGImageSourceCreateImageAtIndex( imageSrc, 0, nil );