1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SkFDot6_DEFINED 18 #define SkFDot6_DEFINED 19 20 #include "SkMath.h" 21 22 typedef int32_t SkFDot6; 23 24 #define SK_FDot61 (64) 25 #define SK_FDot6Half (32) 26 27 #ifdef SK_DEBUG 28 inline SkFDot6 SkIntToFDot6(S16CPU x) 29 { 30 SkASSERT(SkToS16(x) == x); 31 return x << 6; 32 } 33 #else 34 #define SkIntToFDot6(x) ((x) << 6) 35 #endif 36 37 #define SkFDot6Floor(x) ((x) >> 6) 38 #define SkFDot6Ceil(x) (((x) + 63) >> 6) 39 #define SkFDot6Round(x) (((x) + 32) >> 6) 40 41 #define SkFixedToFDot6(x) ((x) >> 10) 42 43 inline SkFixed SkFDot6ToFixed(SkFDot6 x) 44 { 45 SkASSERT((x << 10 >> 10) == x); 46 47 return x << 10; 48 } 49 50 #ifdef SK_SCALAR_IS_FLOAT 51 #define SkScalarToFDot6(x) (SkFDot6)((x) * 64) 52 #else 53 #define SkScalarToFDot6(x) ((x) >> 10) 54 #endif 55 56 inline SkFixed SkFDot6Div(SkFDot6 a, SkFDot6 b) 57 { 58 SkASSERT(b != 0); 59 60 if (a == (int16_t)a) 61 return (a << 16) / b; 62 else 63 return SkFixedDiv(a, b); 64 } 65 66 #endif 67 68
