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Diffstat (limited to 'src/freetype/psfixed.h')
| -rw-r--r-- | src/freetype/psfixed.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/freetype/psfixed.h b/src/freetype/psfixed.h new file mode 100644 index 0000000..219589e --- /dev/null +++ b/src/freetype/psfixed.h @@ -0,0 +1,95 @@ +/***************************************************************************/ +/* */ +/* 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) < 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 /* PSFIXED_H_ */ + + +/* END */ |