/**************************************************************************** * * ftbbox.h * * FreeType exact bbox computation (specification). * * Copyright (C) 1996-2020 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. * */ /************************************************************************** * * This component has a _single_ role: to compute exact outline bounding * boxes. * * It is separated from the rest of the engine for various technical * reasons. It may well be integrated in 'ftoutln' later. * */ #ifndef FTBBOX_H_ #define FTBBOX_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 /************************************************************************** * * @section: * outline_processing * */ /************************************************************************** * * @function: * FT_Outline_Get_BBox * * @description: * Compute the exact bounding box of an outline. This is slower than * computing the control box. However, it uses an advanced algorithm * that returns _very_ quickly when the two boxes coincide. Otherwise, * the outline Bezier arcs are traversed to extract their extrema. * * @input: * outline :: * A pointer to the source outline. * * @output: * abbox :: * The outline's exact bounding box. * * @return: * FreeType error code. 0~means success. * * @note: * If the font is tricky and the glyph has been loaded with * @FT_LOAD_NO_SCALE, the resulting BBox is meaningless. To get * reasonable values for the BBox it is necessary to load the glyph at a * large ppem value (so that the hinting instructions can properly shift * and scale the subglyphs), then extracting the BBox, which can be * eventually converted back to font units. */ FT_EXPORT( FT_Error ) FT_Outline_Get_BBox( FT_Outline* outline, FT_BBox *abbox ); /* */ FT_END_HEADER #endif /* FTBBOX_H_ */ /* END */ /* Local Variables: */ /* coding: utf-8 */ /* End: */