| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| /** |
| * @author Igor V. Stolyarov |
| */ |
| |
| #ifndef _LUT_TABLES_ |
| #define _LUT_TABLES_ |
| |
| |
| #define MUL(a, b) mulLUT[(a)][(b)] |
| #define DIV(a, b) divLUT[(a)][(b)] |
| |
| #define COMPOSE(sa, sr, sg, sb, fs, da, dr, dg, db, fd) \ |
| da = MUL(sa, fs) + MUL(da, fd); \ |
| dr = MUL(sr, fs) + MUL(dr, fd); \ |
| dg = MUL(sg, fs) + MUL(dg, fd); \ |
| db = MUL(sb, fs) + MUL(db, fd); |
| |
| #define COMPOSE_EXT(sa, sr, sg, sb, fs, da, dr, dg, db, fd, alpha) \ |
| sa = MUL(alpha, sa); \ |
| sr = MUL(alpha, sr); \ |
| sg = MUL(alpha, sg); \ |
| sb = MUL(alpha, sb); \ |
| da = MUL(sa, fs) + MUL(da, fd); \ |
| dr = MUL(sr, fs) + MUL(dr, fd); \ |
| dg = MUL(sg, fs) + MUL(dg, fd); \ |
| db = MUL(sb, fs) + MUL(db, fd); |
| |
| extern unsigned char mulLUT[256][256]; /* Multiply Lookup table */ |
| extern unsigned char divLUT[256][256]; /* Divide Lookup table */ |
| extern bool mulLUT_inited; |
| extern bool divLUT_inited; |
| |
| void init_mulLUT(); |
| void init_divLUT(); |
| |
| #endif |
