I have managed to get OpenJPEG to compile in my iOS app, but I have no clue where to begin trying to convert a UIImage to a J2K file or J2K in memory buffer. Suggestions?
问问题
2146 次
1 回答
4
显然 ImageIO 可以做到这一点。您需要将图像 io 框架添加到您的项目中,然后此代码对我有用:
#import <ImageIO/ImageIO.h> // or @import ImageIO if modules enabled
#import <MobileCoreServices/MobileCoreServices.h>
// ...
// quality is 0-1 (0 = smallest file size, 1 = lossless quality)
+ (NSData*) convertToJPEG2000:(UIImage*)image withQuality:(float)quality
{
NSMutableData* d = [NSMutableData data];
CGImageDestinationRef destinationRef = CGImageDestinationCreateWithData((__bridge CFMutableDataRef)d, kUTTypeJPEG2000, 1, NULL);
CGImageDestinationSetProperties(destinationRef, NULL);
CGImageDestinationAddImage(destinationRef, image.CGImage, (__bridge CFDictionaryRef)@{ (NSString*)kCGImageDestinationLossyCompressionQuality: @(quality) });
if (!CGImageDestinationFinalize(destinationRef))
{
d = nil;
}
CFRelease(destinationRef);
return d;
}
于 2013-11-03T17:57:41.060 回答