#import "GPUImageTwoPassFilter.h"
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@interface GPUImageSobelEdgeDetectionFilter : GPUImageTwoPassFilter
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{
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GLint texelWidthUniform, texelHeightUniform, edgeStrengthUniform;
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BOOL hasOverriddenImageSizeFactor;
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}
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// The texel width and height factors tweak the appearance of the edges. By default, they match the inverse of the filter size in pixels
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@property(readwrite, nonatomic) CGFloat texelWidth;
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@property(readwrite, nonatomic) CGFloat texelHeight;
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// The filter strength property affects the dynamic range of the filter. High values can make edges more visible, but can lead to saturation. Default of 1.0.
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@property(readwrite, nonatomic) CGFloat edgeStrength;
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@end
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