91a798f121
Committed: http://code.google.com/p/skia/source/detail?r=11122 R=reed@google.com Author: bsalomon@google.com Review URL: https://chromiumcodereview.appspot.com/23707019 git-svn-id: http://skia.googlecode.com/svn/trunk@11131 2bbb7eff-a529-9590-31e7-b0007b416f81
25 lines
905 B
C++
25 lines
905 B
C++
/*
|
|
* Copyright 2013 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#include "SkShader.h"
|
|
#include "SkBitmap.h"
|
|
#include "SkRegion.h"
|
|
#include "SkString.h"
|
|
|
|
class SK_API SkBitmapAlphaThresholdShader : public SkShader {
|
|
public:
|
|
/**
|
|
* Creates a shader that samples a bitmap and a region. If the sample is inside the region
|
|
* the alpha of the bitmap color is boosted up to a threshold value. If it is
|
|
* outside the region then the bitmap alpha is decreased to the threshold value.
|
|
* The 0,0 point of the region corresponds to the upper left corner of the bitmap
|
|
* Currently, this only has a GPU implementation, doesn't respect the paint's bitmap
|
|
* filter setting, and always uses clamp mode.
|
|
*/
|
|
static SkShader* Create(const SkBitmap& bitmap, const SkRegion& region, U8CPU threshold);
|
|
};
|