| /**************************************************************************** |
| * |
| * psfixed.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 |
| * FreeType Project License, each contributor to the Work hereby grants |
| * to any individual or legal entity exercising permissions granted by |
| * the FreeType Project License and this section (hereafter, "You" or |
| * "Your") a perpetual, worldwide, non-exclusive, no-charge, |
| * royalty-free, irrevocable (except as stated in this section) patent |
| * license to make, have made, use, offer to sell, sell, import, and |
| * otherwise transfer the Work, where such license applies only to those |
| * patent claims licensable by such contributor that are necessarily |
| * infringed by their contribution(s) alone or by combination of their |
| * contribution(s) with the Work to which such contribution(s) was |
| * submitted. If You institute patent litigation against any entity |
| * (including a cross-claim or counterclaim in a lawsuit) alleging that |
| * the Work or a contribution incorporated within the Work constitutes |
| * direct or contributory patent infringement, then any patent licenses |
| * granted to You under this License for that Work shall terminate as of |
| * the date such litigation is filed. |
| * |
| * By using, modifying, or distributing the Work you indicate that you |
| * have read and understood the terms and conditions of the |
| * FreeType Project License as well as those provided in this section, |
| * and you accept them fully. |
| * |
| */ |
| |
| |
| #ifndef PSFIXED_H_ |
| #define PSFIXED_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 ( (CF2_Fixed)0x10000L ) |
| #define CF2_FIXED_EPSILON ( (CF2_Fixed)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_doubleToFixed( f ) \ |
| ( (CF2_Fixed)( (f) * 65536.0 + 0.5 ) ) |
| #define cf2_fixedAbs( x ) \ |
| ( (x) < 0 ? NEG_INT32( 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) + 0x2000 - ( (x) < 0 ) ) >> 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 /* PSFIXED_H_ */ |
| |
| |
| /* END */ |
