Line data    Source code

       1             : /* This Source Code Form is subject to the terms of the Mozilla Public
       2             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       3             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       4             : 
       5             : #ifndef MOZILLA_GFX_CONVOLUTION_FILTER_H_
       6             : #define MOZILLA_GFX_CONVOLUTION_FILTER_H_
       7             : 
       8             : #include "mozilla/UniquePtr.h"
       9             : 
      10             : class SkConvolutionFilter1D;
      11             : 
      12             : namespace mozilla {
      13             : namespace gfx {
      14             : 
      15             : class ConvolutionFilter
      16             : {
      17             : public:
      18             :   ConvolutionFilter();
      19             :   ~ConvolutionFilter();
      20             : 
      21             :   int32_t MaxFilter() const;
      22             :   int32_t NumValues() const;
      23             : 
      24             :   bool GetFilterOffsetAndLength(int32_t aRowIndex, int32_t* aResultOffset, int32_t* aResultLength);
      25             : 
      26             :   void ConvolveHorizontally(const uint8_t* aSrc, uint8_t* aDst, bool aHasAlpha);
      27             :   void ConvolveVertically(uint8_t* const* aSrc, uint8_t* aDst, int32_t aRowIndex, int32_t aRowSize, bool aHasAlpha);
      28             : 
      29             :   enum class ResizeMethod
      30             :   {
      31             :     BOX,
      32             :     TRIANGLE,
      33             :     LANCZOS3,
      34             :     HAMMING,
      35             :     MITCHELL
      36             :   };
      37             : 
      38             :   bool ComputeResizeFilter(ResizeMethod aResizeMethod, int32_t aSrcSize, int32_t aDstSize);
      39             : 
      40           0 :   static inline size_t PadBytesForSIMD(size_t aBytes) {
      41           0 :     return (aBytes + 31) & ~31;
      42             :   }
      43             : 
      44             : private:
      45             :   UniquePtr<SkConvolutionFilter1D> mFilter;
      46             : };
      47             : 
      48             : } // namespace gfx
      49             : } // namespace mozilla
      50             : 
      51             : #endif /* MOZILLA_GFX_CONVOLUTION_FILTER_H_ */
      52             :