| /* |
| * Copyright 2011 Google Inc. All Rights Reserved. |
| * |
| * 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 SFNTLY_CPP_SRC_SFNTLY_MATH_FONT_MATH_H_ |
| #define SFNTLY_CPP_SRC_SFNTLY_MATH_FONT_MATH_H_ |
| |
| #include "sfntly/port/type.h" |
| |
| namespace sfntly { |
| |
| class FontMath { |
| public: |
| static int32_t Log2(int32_t a) { |
| int r = 0; // r will be lg(a) |
| while (a != 0) { |
| a >>= 1; |
| r++; |
| } |
| return r - 1; |
| } |
| }; |
| |
| } // namespace sfntly |
| |
| #endif // SFNTLY_CPP_SRC_SFNTLY_MATH_FONT_MATH_H_ |