CGImage (RGB) from webp

WebPImageSource.m

#import <Foundation/Foundation.h>
#import <ImageIO/ImageIO.h>
#import <UIKit/UIKit.h>

#include "../libwebp/src/webp/types.h"
#include "../libwebp/src/webp/decode.h"
#include "../libwebp/src/webp/demux.h"

#import "WebPImageSource.h"

CGImageRef create_webp_rgb(size_t width, size_t height, const uint8_t *ptr, size_t length, CGColorSpaceRef colorSpace) {
	const size_t bytesPerPixel = 3;
	const size_t bytesPerRow = align16(bytesPerPixel * width);
	const size_t size = bytesPerRow * height;
	const CGBitmapInfo bitmapInfo = kCGBitmapByteOrder32Little;
	uint8_t *data = (uint8_t *)malloc(size);
	if (!data) {
		return NULL;
	}
	
	if (!WebPDecodeRGBInto(ptr, length, data, size, (int)bytesPerRow)) {
		return NULL;
	}
	
	CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, data, size, bufferFree);
	CGImageRef image = CGImageCreate(width, height, 8, 8 * bytesPerPixel, bytesPerRow, colorSpace, bitmapInfo, provider, NULL, false, kCGRenderingIntentDefault);
	CGDataProviderRelease(provider);
	return image;
}