102 lines
5.1 KiB
C
102 lines
5.1 KiB
C
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/***************************************************************************/
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/* */
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/* ftbbox.h */
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/* */
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/* FreeType exact bbox computation (specification). */
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/* */
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/* Copyright 1996-2001, 2003, 2007, 2011, 2013 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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/*************************************************************************/
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/* */
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/* This component has a _single_ role: to compute exact outline bounding */
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/* boxes. */
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/* */
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/* It is separated from the rest of the engine for various technical */
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/* reasons. It may well be integrated in `ftoutln' later. */
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/* */
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/*************************************************************************/
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#ifndef __FTBBOX_H__
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#define __FTBBOX_H__
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#ifdef FREETYPE_H
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#error "freetype.h of FreeType 1 has been loaded!"
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#error "Please fix the directory search order for header files"
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#error "so that freetype.h of FreeType 2 is found first."
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#endif
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FT_BEGIN_HEADER
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/*************************************************************************/
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/* */
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/* <Section> */
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/* outline_processing */
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/* */
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* <Function> */
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/* FT_Outline_Get_BBox */
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/* */
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/* <Description> */
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/* Compute the exact bounding box of an outline. This is slower */
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/* than computing the control box. However, it uses an advanced */
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/* algorithm that returns _very_ quickly when the two boxes */
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/* coincide. Otherwise, the outline Bézier arcs are traversed to */
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/* extract their extrema. */
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/* */
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/* <Input> */
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/* outline :: A pointer to the source outline. */
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/* */
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/* <Output> */
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/* abbox :: The outline's exact bounding box. */
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/* */
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/* <Return> */
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/* FreeType error code. 0~means success. */
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/* */
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/* <Note> */
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/* If the font is tricky and the glyph has been loaded with */
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/* @FT_LOAD_NO_SCALE, the resulting BBox is meaningless. To get */
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/* reasonable values for the BBox it is necessary to load the glyph */
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/* at a large ppem value (so that the hinting instructions can */
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/* properly shift and scale the subglyphs), then extracting the BBox, */
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/* which can be eventually converted back to font units. */
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/* */
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FT_EXPORT( FT_Error )
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FT_Outline_Get_BBox( FT_Outline* outline,
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FT_BBox *abbox );
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/* */
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FT_END_HEADER
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#endif /* __FTBBOX_H__ */
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/* END */
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/* Local Variables: */
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/* coding: utf-8 */
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/* End: */
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