| /***************************************************************************/ |
| /* */ |
| /* ftpfr.h */ |
| /* */ |
| /* FreeType API for accessing PFR-specific data */ |
| /* */ |
| /* Copyright 2002 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 |
| |
| |
| FT_BEGIN_HEADER |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Section> */ |
| /* pfr_fonts */ |
| /* */ |
| /* <Title> */ |
| /* PFR Fonts */ |
| /* */ |
| /* <Abstract> */ |
| /* PFR/TrueDoc specific APIs */ |
| /* */ |
| /* <Description> */ |
| /* This section contains the declaration of PFR-specific functions. */ |
| /* */ |
| /*************************************************************************/ |
| |
| |
| /********************************************************************** |
| * |
| * @function: |
| * FT_Get_PFR_Metrics |
| * |
| * @description: |
| * returns the outline and metrics resolutions of a given PFR |
| * face. |
| * |
| * @input: |
| * face :: handle to input face. It can be a non-PFR face. |
| * |
| * @output: |
| * aoutline_resolution :: |
| * outline resolution. This is equivalent to "face->units_per_EM". |
| * optional (parameter can be NULL) |
| * |
| * ametrics_resolution :: |
| * metrics_resolution. This is equivalent to "outline_resolution" |
| * for non-PFR fonts. can be NULL |
| * optional (parameter can be NULL) |
| * |
| * ametrics_x_scale :: |
| * a 16.16 fixed-point number used to scale distance expressed |
| * in metrics units to device sub-pixels. 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) |
| * |
| * @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: |
| * returns 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 :: handle to input face. |
| * left :: left glyph index |
| * right :: right glyph index |
| * |
| * @output: |
| * avector :: kerning vector |
| * |
| * @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 return 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 sub-pixels |
| */ |
| 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: |
| * returns a given glyph advance, expressed in original metrics units, |
| * from a PFR font. |
| * |
| * @input: |
| * face :: handle to input face. |
| * gindex :: glyph index |
| * |
| * @output: |
| * aadvance :: glyph advance in metrics units |
| * |
| * @return: |
| * 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 sub-pixels (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 /* __FTBDF_H__ */ |
| |
| |
| /* END */ |