38 lines
1.2 KiB
Mathematica
38 lines
1.2 KiB
Mathematica
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// MBIMImageUtils.m
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// kordophoned
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//
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// Created by James Magahern on 12/20/22.
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// Copyright © 2022 James Magahern. All rights reserved.
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//
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#import "MBIMImageUtils.h"
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#import <ImageIO/ImageIO.h>
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NSData* MBIMCGImageJPEGRepresentation(CGImageRef imageRef)
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{
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if (imageRef == NULL) return nil;
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NSNumber *const DPI = @72.0;
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NSNumber *const compressionQuality = @0.9;
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NSDictionary *properties = @{
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(__bridge NSString *)kCGImagePropertyDPIWidth : DPI,
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(__bridge NSString *)kCGImagePropertyDPIHeight : DPI,
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(__bridge NSString *)kCGImageDestinationLossyCompressionQuality : compressionQuality,
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};
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bool success = false;
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NSMutableData *data = [NSMutableData data];
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if (data) {
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CGImageDestinationRef imageDestination = CGImageDestinationCreateWithData((CFMutableDataRef)data, CFSTR("public.jpeg"), 1/*count*/, NULL/*options*/);
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if (imageDestination != NULL) {
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CGImageDestinationAddImage(imageDestination, imageRef, (__bridge CFDictionaryRef)properties);
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success = CGImageDestinationFinalize(imageDestination);
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CFRelease(imageDestination);
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}
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}
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return success ? data : nil;
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}
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