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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkAlphaThresholdFilter_DEFINED
#define SkAlphaThresholdFilter_DEFINED
#include "SkRegion.h"
#include "SkImageFilter.h"
class SK_API SkAlphaThresholdFilter {
public:
/**
* Creates an image filter that samples a region. If the sample is inside the
* region the alpha of the image is boosted up to a threshold value. If it is
* outside the region then the alpha is decreased to the threshold value.
* The 0,0 point of the region corresponds to the upper left corner of the
* source image.
*/
static SkImageFilter* Create(const SkRegion& region, SkScalar innerThreshold,
SkScalar outerThreshold, SkImageFilter* input = NULL);
};
#endif
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