1 2 /* 3 * Copyright 2012 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #ifndef SkColorTable_DEFINED 11 #define SkColorTable_DEFINED 12 13 #include "../private/SkOnce.h" 14 #include "SkColor.h" 15 #include "SkFlattenable.h" 16 #include "SkImageInfo.h" 17 18 /** \class SkColorTable 19 20 SkColorTable holds an array SkPMColors (premultiplied 32-bit colors) used by 21 8-bit bitmaps, where the bitmap bytes are interpreted as indices into the colortable. 22 23 SkColorTable is thread-safe. 24 */ 25 class SkColorTable : public SkRefCnt { 26 public: 27 /** Copy up to 256 colors into a new SkColorTable. 28 */ 29 SkColorTable(const SkPMColor colors[], int count); 30 ~SkColorTable() override; 31 32 /** Returns the number of colors in the table. 33 */ 34 int count() const { return fCount; } 35 36 /** Returns the specified color from the table. In the debug build, this asserts that 37 * the index is in range (0 <= index < count). 38 */ 39 SkPMColor operator[](int index) const { 40 SkASSERT(fColors != nullptr && (unsigned)index < (unsigned)fCount); 41 return fColors[index]; 42 } 43 44 /** Return the array of colors for reading. */ 45 const SkPMColor* readColors() const { return fColors; } 46 47 // may return null 48 static void Skip(SkReadBuffer&); 49 50 private: 51 SkPMColor* fColors; 52 int fCount; 53 54 typedef SkRefCnt INHERITED; 55 }; 56 57 #endif 58
