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Diffstat (limited to 'modules/freetype2/include/freetype/ftsynth.h')
| -rw-r--r-- | modules/freetype2/include/freetype/ftsynth.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/modules/freetype2/include/freetype/ftsynth.h b/modules/freetype2/include/freetype/ftsynth.h new file mode 100644 index 0000000000..af90967dda --- /dev/null +++ b/modules/freetype2/include/freetype/ftsynth.h @@ -0,0 +1,104 @@ +/**************************************************************************** + * + * ftsynth.h + * + * FreeType synthesizing code for emboldening and slanting + * (specification). + * + * Copyright (C) 2000-2023 by + * David Turner, Robert Wilhelm, and Werner Lemberg. + * + * This file is part of the FreeType project, and may only be used, + * modified, and distributed under the terms of the FreeType project + * license, LICENSE.TXT. By continuing to use, modify, or distribute + * this file you indicate that you have read the license and + * understand and accept it fully. + * + */ + + + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + /********* *********/ + /********* WARNING, THIS IS ALPHA CODE! THIS API *********/ + /********* IS DUE TO CHANGE UNTIL STRICTLY NOTIFIED BY THE *********/ + /********* FREETYPE DEVELOPMENT TEAM *********/ + /********* *********/ + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + + + /* Main reason for not lifting the functions in this module to a */ + /* 'standard' API is that the used parameters for emboldening and */ + /* slanting are not configurable. Consider the functions as a */ + /* code resource that should be copied into the application and */ + /* adapted to the particular needs. */ + + +#ifndef FTSYNTH_H_ +#define FTSYNTH_H_ + + +#include <freetype/freetype.h> + +#ifdef FREETYPE_H +#error "freetype.h of FreeType 1 has been loaded!" +#error "Please fix the directory search order for header files" +#error "so that freetype.h of FreeType 2 is found first." +#endif + + +FT_BEGIN_HEADER + + /* Embolden a glyph by a 'reasonable' value (which is highly a matter of */ + /* taste). This function is actually a convenience function, providing */ + /* a wrapper for @FT_Outline_Embolden and @FT_Bitmap_Embolden. */ + /* */ + /* For emboldened outlines the height, width, and advance metrics are */ + /* increased by the strength of the emboldening -- this even affects */ + /* mono-width fonts! */ + /* */ + /* You can also call @FT_Outline_Get_CBox to get precise values. */ + FT_EXPORT( void ) + FT_GlyphSlot_Embolden( FT_GlyphSlot slot ); + + /* Precisely adjust the glyph weight either horizontally or vertically. */ + /* The `xdelta` and `ydelta` values are fractions of the face Em size */ + /* (in fixed-point format). Considering that a regular face would have */ + /* stem widths on the order of 0.1 Em, a delta of 0.05 (0x0CCC) should */ + /* be very noticeable. To increase or decrease the weight, use positive */ + /* or negative values, respectively. */ + FT_EXPORT( void ) + FT_GlyphSlot_AdjustWeight( FT_GlyphSlot slot, + FT_Fixed xdelta, + FT_Fixed ydelta ); + + + /* Slant an outline glyph to the right by about 12 degrees. */ + FT_EXPORT( void ) + FT_GlyphSlot_Oblique( FT_GlyphSlot slot ); + + /* Slant an outline glyph by a given sine of an angle. You can apply */ + /* slant along either x- or y-axis by choosing a corresponding non-zero */ + /* argument. If both slants are non-zero, some affine transformation */ + /* will result. */ + FT_EXPORT( void ) + FT_GlyphSlot_Slant( FT_GlyphSlot slot, + FT_Fixed xslant, + FT_Fixed yslant ); + + /* */ + + +FT_END_HEADER + +#endif /* FTSYNTH_H_ */ + + +/* END */ |