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44 lines
1.6 KiB
Objective-C
44 lines
1.6 KiB
Objective-C
#import "TGListThumbnailSignals.h"
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#import "TGImageUtils.h"
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#import "TGImageBlur.h"
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@implementation TGListThumbnailSignals
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+ (UIImage *)listThumbnail:(CGSize)size image:(UIImage *)image blurImage:(bool)blurImage averageColor:(uint32_t *)averageColor pixelProcessingBlock:(void (^)(void *, int, int, int))pixelProcessingBlock
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{
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CGSize pixelSize = size;
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if (TGIsRetina())
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{
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pixelSize.width *= 2.0f;
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pixelSize.height *= 2.0f;
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}
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CGSize renderSize = TGScaleToFill(image.size, pixelSize);
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UIImage *resultImage = nil;
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if (blurImage)
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resultImage = TGBlurredRectangularImage(image, pixelSize, renderSize, averageColor, pixelProcessingBlock);
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else
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resultImage = TGScaleAndCropImageToPixelSize(image, pixelSize, renderSize, averageColor, pixelProcessingBlock);
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return resultImage;
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}
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+ (SSignal *)signalForListThumbnail:(CGSize)size image:(UIImage *)image blurImage:(bool)blurImage pixelProcessingBlock:(void (^)(void *, int, int, int))pixelProcessingBlock calculateAverageColor:(bool)calculateAverageColor
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{
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return [[SSignal alloc] initWithGenerator:^id<SDisposable> (SSubscriber *subscriber)
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{
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uint32_t averageColor = 0;
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UIImage *resultImage = [self listThumbnail:size image:image blurImage:blurImage averageColor:calculateAverageColor ? &averageColor : NULL pixelProcessingBlock:pixelProcessingBlock];
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if (resultImage != nil)
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{
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if (calculateAverageColor)
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[subscriber putNext:@(averageColor)];
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[subscriber putNext:resultImage];
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}
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[subscriber putCompletion];
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return nil;
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}];
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}
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@end
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