1 /* 2 * Copyright 2012 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 SkColorTable_DEFINED 9 #define SkColorTable_DEFINED 10 11 #include "SkColor.h" 12 #include "SkRefCnt.h" 13 14 /** \class SkColorTable 15 16 SkColorTable holds an array SkPMColors (premultiplied 32-bit colors) used by 17 8-bit bitmaps, where the bitmap bytes are interpreted as indices into the colortable. 18 19 SkColorTable is thread-safe. 20 */ 21 class SkColorTable : public SkRefCnt { 22 public: 23 /** Copy up to 256 colors into a new SkColorTable. 24 */ 25 SkColorTable(const SkPMColor colors[], int count); 26 ~SkColorTable() override; 27 28 /** Returns the number of colors in the table. 29 */ 30 int count() const { return fCount; } 31 32 /** Returns the specified color from the table. In the debug build, this asserts that 33 * the index is in range (0 <= index < count). 34 */ 35 SkPMColor operator[](int index) const { 36 SkASSERT(fColors != nullptr && (unsigned)index < (unsigned)fCount); 37 return fColors[index]; 38 } 39 40 /** Return the array of colors for reading. */ 41 const SkPMColor* readColors() const { return fColors; } 42 43 private: 44 SkPMColor* fColors; 45 int fCount; 46 47 typedef SkRefCnt INHERITED; 48 }; 49 50 #endif 51
