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 SkColorPalette_DEFINED 9 #define SkColorPalette_DEFINED 10 11 #include "include/core/SkColor.h" 12 #include "include/core/SkRefCnt.h" 13 #include "include/core/SkTypes.h" 14 15 /** \class SkColorPalette 16 17 SkColorPalette holds an array of SkPMColors (premultiplied 32-bit colors) used by 18 8-bit bitmaps, where the bitmap bytes are interpreted as indices into the colortable. 19 20 SkColorPalette is thread-safe. 21 */ 22 class SkColorPalette : public SkRefCnt { 23 public: 24 /** Copy up to 256 colors into a new SkColorPalette. 25 */ 26 SkColorPalette(const SkPMColor colors[], int count); 27 ~SkColorPalette() override; 28 29 /** Returns the number of colors in the table. 30 */ count()31 int count() const { return fCount; } 32 33 /** Returns the specified color from the table. In the debug build, this asserts that 34 * the index is in range (0 <= index < count). 35 */ 36 SkPMColor operator[](int index) const { 37 SkASSERT(fColors != nullptr && (unsigned)index < (unsigned)fCount); 38 return fColors[index]; 39 } 40 41 /** Return the array of colors for reading. */ readColors()42 const SkPMColor* readColors() const { return fColors; } 43 44 private: 45 SkPMColor* fColors; 46 int fCount; 47 48 using INHERITED = SkRefCnt; 49 }; 50 51 #endif 52