| /**************************************************************************** |
| * |
| * ftbbox.h |
| * |
| * FreeType exact bbox computation (specification). |
| * |
| * Copyright (C) 1996-2021 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: */ |