| 1 | /**************************************************************************** |
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| 2 | * |
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| 3 | * ftsynth.h |
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| 4 | * |
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| 5 | * FreeType synthesizing code for emboldening and slanting |
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| 6 | * (specification). |
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| 7 | * |
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| 8 | * Copyright (C) 2000-2021 by |
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| 9 | * David Turner, Robert Wilhelm, and Werner Lemberg. |
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| 10 | * |
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| 11 | * This file is part of the FreeType project, and may only be used, |
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| 12 | * modified, and distributed under the terms of the FreeType project |
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| 13 | * license, LICENSE.TXT. By continuing to use, modify, or distribute |
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| 14 | * this file you indicate that you have read the license and |
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| 15 | * understand and accept it fully. |
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| 16 | * |
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| 17 | */ |
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| 18 | |
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| 19 | |
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| 20 | /*************************************************************************/ |
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| 21 | /*************************************************************************/ |
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| 22 | /*************************************************************************/ |
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| 23 | /*************************************************************************/ |
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| 24 | /*************************************************************************/ |
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| 25 | /********* *********/ |
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| 26 | /********* WARNING, THIS IS ALPHA CODE! THIS API *********/ |
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| 27 | /********* IS DUE TO CHANGE UNTIL STRICTLY NOTIFIED BY THE *********/ |
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| 28 | /********* FREETYPE DEVELOPMENT TEAM *********/ |
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| 29 | /********* *********/ |
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| 30 | /*************************************************************************/ |
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| 31 | /*************************************************************************/ |
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| 32 | /*************************************************************************/ |
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| 33 | /*************************************************************************/ |
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| 34 | /*************************************************************************/ |
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| 35 | |
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| 36 | |
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| 37 | /* Main reason for not lifting the functions in this module to a */ |
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| 38 | /* 'standard' API is that the used parameters for emboldening and */ |
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| 39 | /* slanting are not configurable. Consider the functions as a */ |
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| 40 | /* code resource that should be copied into the application and */ |
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| 41 | /* adapted to the particular needs. */ |
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| 42 | |
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| 43 | |
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| 44 | #ifndef FTSYNTH_H_ |
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| 45 | #define FTSYNTH_H_ |
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| 46 | |
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| 47 | |
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| 48 | #include <freetype/freetype.h> |
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| 49 | |
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| 50 | #ifdef FREETYPE_H |
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| 51 | #error "freetype.h of FreeType 1 has been loaded!" |
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| 52 | #error "Please fix the directory search order for header files" |
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| 53 | #error "so that freetype.h of FreeType 2 is found first." |
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| 54 | #endif |
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| 55 | |
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| 56 | |
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| 57 | FT_BEGIN_HEADER |
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| 58 | |
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| 59 | /* Embolden a glyph by a 'reasonable' value (which is highly a matter of */ |
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| 60 | /* taste). This function is actually a convenience function, providing */ |
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| 61 | /* a wrapper for @FT_Outline_Embolden and @FT_Bitmap_Embolden. */ |
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| 62 | /* */ |
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| 63 | /* For emboldened outlines the height, width, and advance metrics are */ |
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| 64 | /* increased by the strength of the emboldening -- this even affects */ |
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| 65 | /* mono-width fonts! */ |
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| 66 | /* */ |
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| 67 | /* You can also call @FT_Outline_Get_CBox to get precise values. */ |
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| 68 | FT_EXPORT( void ) |
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| 69 | FT_GlyphSlot_Embolden( FT_GlyphSlot slot ); |
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| 70 | |
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| 71 | /* Slant an outline glyph to the right by about 12 degrees. */ |
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| 72 | FT_EXPORT( void ) |
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| 73 | FT_GlyphSlot_Oblique( FT_GlyphSlot slot ); |
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| 74 | |
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| 75 | /* */ |
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| 76 | |
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| 77 | |
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| 78 | FT_END_HEADER |
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| 79 | |
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| 80 | #endif /* FTSYNTH_H_ */ |
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| 81 | |
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| 82 | |
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| 83 | /* END */ |
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| 84 | |
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