| /***************************************************************************/ |
| /* */ |
| /* cf2fixed.h */ |
| /* */ |
| /* Adobe's code for Fixed Point Mathematics (specification only). */ |
| /* */ |
| /* Copyright 2007-2013 Adobe Systems Incorporated. */ |
| /* */ |
| /* This software, and all works of authorship, whether in source or */ |
| /* object code form as indicated by the copyright notice(s) included */ |
| /* herein (collectively, the "Work") is made available, and may only be */ |
| /* used, modified, and distributed under the FreeType Project License, */ |
| /* LICENSE.TXT. Additionally, subject to the terms and conditions of the */ |
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| /* to any individual or legal entity exercising permissions granted by */ |
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| /* */ |
| /***************************************************************************/ |
| |
| |
| #ifndef __CF2FIXED_H__ |
| #define __CF2FIXED_H__ |
| |
| |
| FT_BEGIN_HEADER |
| |
| |
| /* rasterizer integer and fixed point arithmetic must be 32-bit */ |
| |
| #define CF2_Fixed CF2_F16Dot16 |
| typedef FT_Int32 CF2_Frac; /* 2.30 fixed point */ |
| |
| |
| #define CF2_FIXED_MAX ( (CF2_Fixed)0x7FFFFFFFL ) |
| #define CF2_FIXED_MIN ( (CF2_Fixed)0x80000000L ) |
| #define CF2_FIXED_ONE 0x10000L |
| #define CF2_FIXED_EPSILON 0x0001 |
| |
| /* in C 89, left and right shift of negative numbers is */ |
| /* implementation specific behaviour in the general case */ |
| |
| #define cf2_intToFixed( i ) \ |
| ( (CF2_Fixed)( (FT_UInt32)(i) << 16 ) ) |
| #define cf2_fixedToInt( x ) \ |
| ( (FT_Short)( ( (FT_UInt32)(x) + 0x8000U ) >> 16 ) ) |
| #define cf2_fixedRound( x ) \ |
| ( (CF2_Fixed)( ( (FT_UInt32)(x) + 0x8000U ) & 0xFFFF0000UL ) ) |
| #define cf2_floatToFixed( f ) \ |
| ( (CF2_Fixed)( (f) * 65536.0 + 0.5 ) ) |
| #define cf2_fixedAbs( x ) \ |
| ( (x) < 0 ? -(x) : (x) ) |
| #define cf2_fixedFloor( x ) \ |
| ( (CF2_Fixed)( (FT_UInt32)(x) & 0xFFFF0000UL ) ) |
| #define cf2_fixedFraction( x ) \ |
| ( (x) - cf2_fixedFloor( x ) ) |
| #define cf2_fracToFixed( x ) \ |
| ( (x) < 0 ? -( ( -(x) + 0x2000 ) >> 14 ) \ |
| : ( ( (x) + 0x2000 ) >> 14 ) ) |
| |
| |
| /* signed numeric types */ |
| typedef enum CF2_NumberType_ |
| { |
| CF2_NumberFixed, /* 16.16 */ |
| CF2_NumberFrac, /* 2.30 */ |
| CF2_NumberInt /* 32.0 */ |
| |
| } CF2_NumberType; |
| |
| |
| FT_END_HEADER |
| |
| |
| #endif /* __CF2FIXED_H__ */ |
| |
| |
| /* END */ |