| /* |
| * 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 "include/core/SkTypes.h" |
| |
| #include <cstdint> |
| |
| // Contains useful mask routines for SkMaskSwizzler |
| class SkMasks { |
| public: |
| //Contains all of the information for a single mask |
| struct MaskInfo { |
| uint32_t mask; |
| uint32_t shift; // To the left |
| uint32_t size; // Of mask width |
| }; |
| |
| constexpr SkMasks(const MaskInfo red, const MaskInfo green, const MaskInfo blue, |
| const MaskInfo alpha) |
| : fRed(red) |
| , fGreen(green) |
| , fBlue(blue) |
| , fAlpha(alpha) { } |
| |
| //Input bit masks format |
| struct InputMasks { |
| uint32_t red; |
| uint32_t green; |
| uint32_t blue; |
| uint32_t alpha; |
| }; |
| |
| // Create the masks object |
| static SkMasks* CreateMasks(InputMasks masks, int bytesPerPixel); |
| |
| // 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: |
| const MaskInfo fRed; |
| const MaskInfo fGreen; |
| const MaskInfo fBlue; |
| const MaskInfo fAlpha; |
| }; |
| |
| #endif |