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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkMasks_DEFINED
#define SkMasks_DEFINED
#include "SkTypes.h"
/*
*
* Contains useful mask routines for SkMaskSwizzler
*
*/
class SkMasks {
public:
/*
*
* Input bit masks format
*
*/
struct InputMasks {
uint32_t red;
uint32_t green;
uint32_t blue;
uint32_t alpha;
};
/*
*
* Contains all of the information for a single mask
*
*/
struct MaskInfo {
uint32_t mask;
uint32_t shift;
uint32_t size;
};
/*
*
* Create the masks object
*
*/
static SkMasks* CreateMasks(InputMasks masks, uint32_t bpp);
/*
*
* Get a color component
*
*/
uint8_t getRed(uint32_t pixel) const;
uint8_t getGreen(uint32_t pixel) const;
uint8_t getBlue(uint32_t pixel) const;
uint8_t getAlpha(uint32_t pixel) const;
/*
*
* Getter for the alpha mask
* The alpha mask may be used in other decoding modes
*
*/
uint32_t getAlphaMask() const {
return fAlpha.mask;
}
private:
/*
*
* Constructor
*
*/
SkMasks(const MaskInfo& red, const MaskInfo& green, const MaskInfo& blue,
const MaskInfo& alpha);
const MaskInfo fRed;
const MaskInfo fGreen;
const MaskInfo fBlue;
const MaskInfo fAlpha;
};
#endif
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