103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
|
/****************************************************************************
|
||
|
|
*
|
||
|
|
* 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 <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:
|
||
|
|
* 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: */
|