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Edit File: ftpfr.h
/***************************************************************************/ /* */ /* ftpfr.h */ /* */ /* FreeType API for accessing PFR-specific data (specification only). */ /* */ /* Copyright 2002-2018 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. */ /* */ /***************************************************************************/ #ifndef FTPFR_H_ #define FTPFR_H_ #include <ft2build.h> #include FT_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 /*************************************************************************/ /* */ /* <Section> */ /* pfr_fonts */ /* */ /* <Title> */ /* PFR Fonts */ /* */ /* <Abstract> */ /* PFR/TrueDoc specific API. */ /* */ /* <Description> */ /* This section contains the declaration of PFR-specific functions. */ /* */ /*************************************************************************/ /********************************************************************** * * @function: * FT_Get_PFR_Metrics * * @description: * Return the outline and metrics resolutions of a given PFR face. * * @input: * face :: Handle to the input face. It can be a non-PFR face. * * @output: * aoutline_resolution :: * Outline resolution. This is equivalent to `face->units_per_EM' * for non-PFR fonts. Optional (parameter can be NULL). * * ametrics_resolution :: * Metrics resolution. This is equivalent to `outline_resolution' * for non-PFR fonts. Optional (parameter can be NULL). * * ametrics_x_scale :: * A 16.16 fixed-point number used to scale distance expressed * in metrics units to device subpixels. This is equivalent to * `face->size->x_scale', but for metrics only. Optional (parameter * can be NULL). * * ametrics_y_scale :: * Same as `ametrics_x_scale' but for the vertical direction. * optional (parameter can be NULL). * * @return: * FreeType error code. 0~means success. * * @note: * If the input face is not a PFR, this function will return an error. * However, in all cases, it will return valid values. */ FT_EXPORT( FT_Error ) FT_Get_PFR_Metrics( FT_Face face, FT_UInt *aoutline_resolution, FT_UInt *ametrics_resolution, FT_Fixed *ametrics_x_scale, FT_Fixed *ametrics_y_scale ); /********************************************************************** * * @function: * FT_Get_PFR_Kerning * * @description: * Return the kerning pair corresponding to two glyphs in a PFR face. * The distance is expressed in metrics units, unlike the result of * @FT_Get_Kerning. * * @input: * face :: A handle to the input face. * * left :: Index of the left glyph. * * right :: Index of the right glyph. * * @output: * avector :: A kerning vector. * * @return: * FreeType error code. 0~means success. * * @note: * This function always return distances in original PFR metrics * units. This is unlike @FT_Get_Kerning with the @FT_KERNING_UNSCALED * mode, which always returns distances converted to outline units. * * You can use the value of the `x_scale' and `y_scale' parameters * returned by @FT_Get_PFR_Metrics to scale these to device subpixels. */ FT_EXPORT( FT_Error ) FT_Get_PFR_Kerning( FT_Face face, FT_UInt left, FT_UInt right, FT_Vector *avector ); /********************************************************************** * * @function: * FT_Get_PFR_Advance * * @description: * Return a given glyph advance, expressed in original metrics units, * from a PFR font. * * @input: * face :: A handle to the input face. * * gindex :: The glyph index. * * @output: * aadvance :: The glyph advance in metrics units. * * @return: * FreeType error code. 0~means success. * * @note: * You can use the `x_scale' or `y_scale' results of @FT_Get_PFR_Metrics * to convert the advance to device subpixels (i.e., 1/64th of pixels). */ FT_EXPORT( FT_Error ) FT_Get_PFR_Advance( FT_Face face, FT_UInt gindex, FT_Pos *aadvance ); /* */ FT_END_HEADER #endif /* FTPFR_H_ */ /* END */
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