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/****************************************************************************
*
* ftsynth.h
*
* FreeType synthesizing code for emboldening and slanting
* (specification).
*
* Copyright (C) 2000-2024 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 */
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