1 /* 2 * Copyright 2016 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 SkColorLookUpTable_DEFINED 9 #define SkColorLookUpTable_DEFINED 10 11 #include "SkNx.h" 12 #include "SkRefCnt.h" 13 #include "SkTemplates.h" 14 15 // TODO: scope inside SkColorLookUpTable 16 static constexpr uint8_t kMaxColorChannels = 4; 17 18 class SkColorLookUpTable : public SkRefCnt { 19 public: 20 static constexpr uint8_t kOutputChannels = 3; 21 22 SkColorLookUpTable(uint8_t inputChannels, const uint8_t limits[]); 23 24 int inputChannels() const { return fInputChannels; } 25 int outputChannels() const { return kOutputChannels; } 26 27 // TODO: Rename to somethingBetter(int)? 28 int gridPoints(int dimension) const { 29 SkASSERT(dimension >= 0 && dimension < inputChannels()); 30 return fLimits[dimension]; 31 } 32 33 // Objects of this type are created in a custom fashion using sk_malloc_throw 34 // and therefore must be sk_freed. 35 void* operator new(size_t size) = delete; 36 void* operator new(size_t, void* p) { return p; } 37 void operator delete(void* p) { sk_free(p); } 38 39 const float* table() const { 40 return SkTAddOffset<const float>(this, sizeof(SkColorLookUpTable)); 41 } 42 43 private: 44 uint8_t fInputChannels; 45 uint8_t fLimits[kMaxColorChannels]; 46 }; 47 48 #endif 49
