66 lines
1.9 KiB
Objective-C
66 lines
1.9 KiB
Objective-C
//
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// UIImage+WebP.m
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// SDWebImage
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//
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// Created by Olivier Poitrey on 07/06/13.
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// Copyright (c) 2013 Dailymotion. All rights reserved.
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//
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#ifdef SD_WEBP
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#import "UIImage+WebP.h"
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#import "webp/decode.h"
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// Callback for CGDataProviderRelease
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static void FreeImageData(void *info, const void *data, size_t size)
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{
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free((void *)data);
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}
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@implementation UIImage (WebP)
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+ (UIImage *)sd_imageWithWebPData:(NSData *)data {
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WebPDecoderConfig config;
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if (!WebPInitDecoderConfig(&config)) {
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return nil;
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}
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config.output.colorspace = MODE_rgbA;
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config.options.use_threads = 1;
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// Decode the WebP image data into a RGBA value array.
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if (WebPDecode(data.bytes, data.length, &config) != VP8_STATUS_OK) {
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return nil;
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}
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int width = config.input.width;
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int height = config.input.height;
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if (config.options.use_scaling) {
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width = config.options.scaled_width;
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height = config.options.scaled_height;
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}
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// Construct a UIImage from the decoded RGBA value array.
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CGDataProviderRef provider =
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CGDataProviderCreateWithData(NULL, config.output.u.RGBA.rgba, config.output.u.RGBA.size, FreeImageData);
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CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
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CGBitmapInfo bitmapInfo = kCGBitmapByteOrder32Big | kCGImageAlphaPremultipliedLast;
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CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;
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CGImageRef imageRef = CGImageCreate(width, height, 8, 32, 4 * width, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent);
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CGColorSpaceRelease(colorSpaceRef);
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CGDataProviderRelease(provider);
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UIImage *image = [[UIImage alloc] initWithCGImage:imageRef];
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CGImageRelease(imageRef);
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return image;
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}
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@end
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// Functions to resolve some undefined symbols when using WebP and force_load flag
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void WebPInitPremultiplyNEON(void) {}
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void WebPInitUpsamplersNEON(void) {}
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void VP8DspInitNEON(void) {}
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#endif
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