Line data    Source code

       1             : /*
       2             :  * Copyright 2015 Google Inc.
       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 GrDistanceFieldAdjustTable_DEFINED
       9             : #define GrDistanceFieldAdjustTable_DEFINED
      10             : 
      11             : #include "SkRefCnt.h"
      12             : #include "SkScalar.h"
      13             : 
      14             : // Distance field text needs this table to compute a value for use in the fragment shader.
      15             : // Because the GrAtlasTextContext can go out of scope before the final flush, this needs to be
      16             : // refcnted and malloced
      17             : struct GrDistanceFieldAdjustTable : public SkNVRefCnt<GrDistanceFieldAdjustTable> {
      18           0 :     GrDistanceFieldAdjustTable() { this->buildDistanceAdjustTables(); }
      19           0 :     ~GrDistanceFieldAdjustTable() {
      20           0 :         delete[] fTable;
      21           0 :         delete[] fGammaCorrectTable;
      22           0 :     }
      23             : 
      24           0 :     const SkScalar& getAdjustment(int i, bool useGammaCorrectTable) const {
      25           0 :         return useGammaCorrectTable ? fGammaCorrectTable[i] : fTable[i];
      26             :     }
      27             : 
      28             : private:
      29             :     void buildDistanceAdjustTables();
      30             : 
      31             :     SkScalar* fTable;
      32             :     SkScalar* fGammaCorrectTable;
      33             : };
      34             : 
      35             : #endif