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