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_FDot6One (64) 25 #define SK_FDot6Half (32) 26 27 #ifdef SK_DEBUG 28 inline SkFDot6 SkIntToFDot6(S16CPU x) { 29 SkASSERT(SkToS16(x) == x); 30 return x << 6; 31 } 32 #else 33 #define SkIntToFDot6(x) ((x) << 6) 34 #endif 35 36 #define SkFDot6Floor(x) ((x) >> 6) 37 #define SkFDot6Ceil(x) (((x) + 63) >> 6) 38 #define SkFDot6Round(x) (((x) + 32) >> 6) 39 40 #define SkFixedToFDot6(x) ((x) >> 10) 41 42 inline SkFixed SkFDot6ToFixed(SkFDot6 x) { 43 SkASSERT((x << 10 >> 10) == x); 44 45 return x << 10; 46 } 47 48 #ifdef SK_SCALAR_IS_FLOAT 49 #define SkScalarToFDot6(x) (SkFDot6)((x) * 64) 50 #else 51 #define SkScalarToFDot6(x) ((x) >> 10) 52 #endif 53 54 inline SkFixed SkFDot6Div(SkFDot6 a, SkFDot6 b) { 55 SkASSERT(b != 0); 56 57 if (a == (int16_t)a) { 58 return (a << 16) / b; 59 } else { 60 return SkFixedDiv(a, b); 61 } 62 } 63 64 #endif 65 66
