56 lines
2.0 KiB
Objective-C
56 lines
2.0 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import <Foundation/Foundation.h>
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#import <CoreGraphics/CoreGraphics.h>
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@class UTType;
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NS_ASSUME_NONNULL_BEGIN
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// Those values define the allowed ranges for the scaling factor and compression quality settings
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extern const CGFloat FBMinScalingFactor;
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extern const CGFloat FBMaxScalingFactor;
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extern const CGFloat FBMinCompressionQuality;
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extern const CGFloat FBMaxCompressionQuality;
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@interface FBImageProcessor : NSObject
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/**
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Puts the passed image on the queue and dispatches a scaling operation. If there is already a image on the
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queue it will be replaced with the new one
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@param image The image to scale down
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@param completionHandler called after successfully scaling down an image
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@param scalingFactor the scaling factor in range 0.01..1.0. A value of 1.0 won't perform scaling at all
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*/
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- (void)submitImageData:(NSData *)image
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scalingFactor:(CGFloat)scalingFactor
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completionHandler:(void (^)(NSData *))completionHandler;
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/**
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Scales and crops the source image
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@param image The source image data
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@param uti Either UTTypePNG or UTTypeJPEG
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@param scalingFactor Scaling factor in range 0.01..1.0. A value of 1.0 won't perform scaling at all
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@param compressionQuality the compression quality in range 0.0..1.0 (0.0 for max. compression and 1.0 for lossless compression).
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Only works if UTI is set to kUTTypeJPEG
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@param error The actual error instance if the returned result is nil
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@returns Processed image data compressed according to the given UTI or nil in case of a failure
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*/
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- (nullable NSData *)scaledImageWithData:(NSData *)image
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uti:(UTType *)uti
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scalingFactor:(CGFloat)scalingFactor
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compressionQuality:(CGFloat)compressionQuality
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error:(NSError **)error;
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@end
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NS_ASSUME_NONNULL_END
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