michael@0: 
michael@0: /*
michael@0:  * Copyright 2006 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #ifndef SkFDot6_DEFINED
michael@0: #define SkFDot6_DEFINED
michael@0: 
michael@0: #include "SkScalar.h"
michael@0: #include "SkMath.h"
michael@0: 
michael@0: typedef int32_t SkFDot6;
michael@0: 
michael@0: #define SK_FDot6One         (64)
michael@0: #define SK_FDot6Half        (32)
michael@0: 
michael@0: #ifdef SK_DEBUG
michael@0:     inline SkFDot6 SkIntToFDot6(S16CPU x) {
michael@0:         SkASSERT(SkToS16(x) == x);
michael@0:         return x << 6;
michael@0:     }
michael@0: #else
michael@0:     #define SkIntToFDot6(x) ((x) << 6)
michael@0: #endif
michael@0: 
michael@0: #define SkFDot6Floor(x)     ((x) >> 6)
michael@0: #define SkFDot6Ceil(x)      (((x) + 63) >> 6)
michael@0: #define SkFDot6Round(x)     (((x) + 32) >> 6)
michael@0: 
michael@0: #define SkFixedToFDot6(x)   ((x) >> 10)
michael@0: 
michael@0: inline SkFixed SkFDot6ToFixed(SkFDot6 x) {
michael@0:     SkASSERT((x << 10 >> 10) == x);
michael@0: 
michael@0:     return x << 10;
michael@0: }
michael@0: 
michael@0: #define SkScalarToFDot6(x)  (SkFDot6)((x) * 64)
michael@0: #define SkFDot6ToScalar(x)  ((SkScalar)(x) * 0.015625f)
michael@0: 
michael@0: inline SkFixed SkFDot6Div(SkFDot6 a, SkFDot6 b) {
michael@0:     SkASSERT(b != 0);
michael@0: 
michael@0:     if (a == (int16_t)a) {
michael@0:         return (a << 16) / b;
michael@0:     } else {
michael@0:         return SkFixedDiv(a, b);
michael@0:     }
michael@0: }
michael@0: 
michael@0: #endif