Line data    Source code

       1             : /*
       2             :  * Copyright 2014 The Android Open Source Project
       3             :  *
       4             :  * Use of this source code is governed by a BSD-style license that can be
       5             :  * found in the LICENSE file.
       6             :  */
       7             : 
       8             : #ifndef SkMatrixImageFilter_DEFINED
       9             : #define SkMatrixImageFilter_DEFINED
      10             : 
      11             : #include "SkImageFilter.h"
      12             : #include "SkMatrix.h"
      13             : 
      14             : /*! \class SkMatrixImageFilter
      15             :     Matrix transformation image filter.  This filter draws its source
      16             :     input transformed by the given matrix.
      17             :  */
      18             : 
      19           0 : class SK_API SkMatrixImageFilter : public SkImageFilter {
      20             : public:
      21             :     /** Construct a 2D transformation image filter.
      22             :      *  @param transform     The matrix to apply when drawing the src bitmap
      23             :      *  @param filterQuality The quality of filtering to apply when scaling.
      24             :      *  @param input         The input image filter.  If nullptr, the src bitmap
      25             :      *                       passed to filterImage() is used instead.
      26             :      */
      27             : 
      28             :     static sk_sp<SkImageFilter> Make(const SkMatrix& transform,
      29             :                                      SkFilterQuality filterQuality,
      30             :                                      sk_sp<SkImageFilter> input);
      31             : 
      32             :     SkRect computeFastBounds(const SkRect&) const override;
      33             : 
      34             :     SK_TO_STRING_OVERRIDE()
      35           0 :     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkMatrixImageFilter)
      36             : 
      37             : protected:
      38             :     SkMatrixImageFilter(const SkMatrix& transform,
      39             :                         SkFilterQuality,
      40             :                         sk_sp<SkImageFilter> input);
      41             :     void flatten(SkWriteBuffer&) const override;
      42             : 
      43             :     sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
      44             :                                         SkIPoint* offset) const override;
      45             :     SkIRect onFilterNodeBounds(const SkIRect& src, const SkMatrix&, MapDirection) const override;
      46             : 
      47             : private:
      48             :     SkMatrix              fTransform;
      49             :     SkFilterQuality       fFilterQuality;
      50             :     typedef SkImageFilter INHERITED;
      51             : };
      52             : 
      53             : #endif