| /* |
| * Copyright (C) 2011 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef SkBitSet_DEFINED |
| #define SkBitSet_DEFINED |
| |
| #include "SkTypes.h" |
| #include "SkTDArray.h" |
| |
| class SkBitSet { |
| public: |
| /** NumberOfBits must be greater than zero. |
| */ |
| explicit SkBitSet(int numberOfBits); |
| explicit SkBitSet(const SkBitSet& source); |
| |
| const SkBitSet& operator=(const SkBitSet& rhs); |
| bool operator==(const SkBitSet& rhs); |
| bool operator!=(const SkBitSet& rhs); |
| |
| /** Clear all data. |
| */ |
| void clearAll(); |
| |
| /** Set the value of the index-th bit. |
| */ |
| void setBit(int index, bool value); |
| |
| /** Test if bit index is set. |
| */ |
| bool isBitSet(int index) const; |
| |
| /** Or bits from source. false is returned if this doesn't have the same |
| * bit count as source. |
| */ |
| bool orBits(const SkBitSet& source); |
| |
| /** Export set bits to unsigned int array. (used in font subsetting) |
| */ |
| void exportTo(SkTDArray<uint32_t>* array) const; |
| |
| private: |
| SkAutoFree fBitData; |
| // Dword (32-bit) count of the bitset. |
| size_t fDwordCount; |
| size_t fBitCount; |
| |
| uint32_t* internalGet(int index) const { |
| SkASSERT((size_t)index < fBitCount); |
| size_t internalIndex = index / 32; |
| SkASSERT(internalIndex < fDwordCount); |
| return (uint32_t*)fBitData.get() + internalIndex; |
| } |
| }; |
| |
| |
| #endif |