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modules/freetype2/include/ftglyph.h@6474c204b198 (annotated)

modules/freetype2/include/ftglyph.h

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/***************************************************************************/
michael@0	2	/* */
michael@0	3	/* ftglyph.h */
michael@0	4	/* */
michael@0	5	/* FreeType convenience functions to handle glyphs (specification). */
michael@0	6	/* */
michael@0	7	/* Copyright 1996-2003, 2006, 2008, 2009, 2011, 2013 by */
michael@0	8	/* David Turner, Robert Wilhelm, and Werner Lemberg. */
michael@0	9	/* */
michael@0	10	/* This file is part of the FreeType project, and may only be used, */
michael@0	11	/* modified, and distributed under the terms of the FreeType project */
michael@0	12	/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
michael@0	13	/* this file you indicate that you have read the license and */
michael@0	14	/* understand and accept it fully. */
michael@0	15	/* */
michael@0	16	/***************************************************************************/
michael@0	17
michael@0	18
michael@0	19	/*************************************************************************/
michael@0	20	/* */
michael@0	21	/* This file contains the definition of several convenience functions */
michael@0	22	/* that can be used by client applications to easily retrieve glyph */
michael@0	23	/* bitmaps and outlines from a given face. */
michael@0	24	/* */
michael@0	25	/* These functions should be optional if you are writing a font server */
michael@0	26	/* or text layout engine on top of FreeType. However, they are pretty */
michael@0	27	/* handy for many other simple uses of the library. */
michael@0	28	/* */
michael@0	29	/*************************************************************************/
michael@0	30
michael@0	31
michael@0	32	#ifndef __FTGLYPH_H__
michael@0	33	#define __FTGLYPH_H__
michael@0	34
michael@0	35
michael@0	36	#include <ft2build.h>
michael@0	37	#include FT_FREETYPE_H
michael@0	38
michael@0	39	#ifdef FREETYPE_H
michael@0	40	#error "freetype.h of FreeType 1 has been loaded!"
michael@0	41	#error "Please fix the directory search order for header files"
michael@0	42	#error "so that freetype.h of FreeType 2 is found first."
michael@0	43	#endif
michael@0	44
michael@0	45
michael@0	46	FT_BEGIN_HEADER
michael@0	47
michael@0	48
michael@0	49	/*************************************************************************/
michael@0	50	/* */
michael@0	51	/* <Section> */
michael@0	52	/* glyph_management */
michael@0	53	/* */
michael@0	54	/* <Title> */
michael@0	55	/* Glyph Management */
michael@0	56	/* */
michael@0	57	/* <Abstract> */
michael@0	58	/* Generic interface to manage individual glyph data. */
michael@0	59	/* */
michael@0	60	/* <Description> */
michael@0	61	/* This section contains definitions used to manage glyph data */
michael@0	62	/* through generic FT_Glyph objects. Each of them can contain a */
michael@0	63	/* bitmap, a vector outline, or even images in other formats. */
michael@0	64	/* */
michael@0	65	/*************************************************************************/
michael@0	66
michael@0	67
michael@0	68	/* forward declaration to a private type */
michael@0	69	typedef struct FT_Glyph_Class_ FT_Glyph_Class;
michael@0	70
michael@0	71
michael@0	72	/*************************************************************************/
michael@0	73	/* */
michael@0	74	/* <Type> */
michael@0	75	/* FT_Glyph */
michael@0	76	/* */
michael@0	77	/* <Description> */
michael@0	78	/* Handle to an object used to model generic glyph images. It is a */
michael@0	79	/* pointer to the @FT_GlyphRec structure and can contain a glyph */
michael@0	80	/* bitmap or pointer. */
michael@0	81	/* */
michael@0	82	/* <Note> */
michael@0	83	/* Glyph objects are not owned by the library. You must thus release */
michael@0	84	/* them manually (through @FT_Done_Glyph) _before_ calling */
michael@0	85	/* @FT_Done_FreeType. */
michael@0	86	/* */
michael@0	87	typedef struct FT_GlyphRec_* FT_Glyph;
michael@0	88
michael@0	89
michael@0	90	/*************************************************************************/
michael@0	91	/* */
michael@0	92	/* <Struct> */
michael@0	93	/* FT_GlyphRec */
michael@0	94	/* */
michael@0	95	/* <Description> */
michael@0	96	/* The root glyph structure contains a given glyph image plus its */
michael@0	97	/* advance width in 16.16 fixed-point format. */
michael@0	98	/* */
michael@0	99	/* <Fields> */
michael@0	100	/* library :: A handle to the FreeType library object. */
michael@0	101	/* */
michael@0	102	/* clazz :: A pointer to the glyph's class. Private. */
michael@0	103	/* */
michael@0	104	/* format :: The format of the glyph's image. */
michael@0	105	/* */
michael@0	106	/* advance :: A 16.16 vector that gives the glyph's advance width. */
michael@0	107	/* */
michael@0	108	typedef struct FT_GlyphRec_
michael@0	109	{
michael@0	110	FT_Library library;
michael@0	111	const FT_Glyph_Class* clazz;
michael@0	112	FT_Glyph_Format format;
michael@0	113	FT_Vector advance;
michael@0	114
michael@0	115	} FT_GlyphRec;
michael@0	116
michael@0	117
michael@0	118	/*************************************************************************/
michael@0	119	/* */
michael@0	120	/* <Type> */
michael@0	121	/* FT_BitmapGlyph */
michael@0	122	/* */
michael@0	123	/* <Description> */
michael@0	124	/* A handle to an object used to model a bitmap glyph image. This is */
michael@0	125	/* a sub-class of @FT_Glyph, and a pointer to @FT_BitmapGlyphRec. */
michael@0	126	/* */
michael@0	127	typedef struct FT_BitmapGlyphRec_* FT_BitmapGlyph;
michael@0	128
michael@0	129
michael@0	130	/*************************************************************************/
michael@0	131	/* */
michael@0	132	/* <Struct> */
michael@0	133	/* FT_BitmapGlyphRec */
michael@0	134	/* */
michael@0	135	/* <Description> */
michael@0	136	/* A structure used for bitmap glyph images. This really is a */
michael@0	137	/* `sub-class' of @FT_GlyphRec. */
michael@0	138	/* */
michael@0	139	/* <Fields> */
michael@0	140	/* root :: The root @FT_Glyph fields. */
michael@0	141	/* */
michael@0	142	/* left :: The left-side bearing, i.e., the horizontal distance */
michael@0	143	/* from the current pen position to the left border of the */
michael@0	144	/* glyph bitmap. */
michael@0	145	/* */
michael@0	146	/* top :: The top-side bearing, i.e., the vertical distance from */
michael@0	147	/* the current pen position to the top border of the glyph */
michael@0	148	/* bitmap. This distance is positive for upwards~y! */
michael@0	149	/* */
michael@0	150	/* bitmap :: A descriptor for the bitmap. */
michael@0	151	/* */
michael@0	152	/* <Note> */
michael@0	153	/* You can typecast an @FT_Glyph to @FT_BitmapGlyph if you have */
michael@0	154	/* `glyph->format == FT_GLYPH_FORMAT_BITMAP'. This lets you access */
michael@0	155	/* the bitmap's contents easily. */
michael@0	156	/* */
michael@0	157	/* The corresponding pixel buffer is always owned by @FT_BitmapGlyph */
michael@0	158	/* and is thus created and destroyed with it. */
michael@0	159	/* */
michael@0	160	typedef struct FT_BitmapGlyphRec_
michael@0	161	{
michael@0	162	FT_GlyphRec root;
michael@0	163	FT_Int left;
michael@0	164	FT_Int top;
michael@0	165	FT_Bitmap bitmap;
michael@0	166
michael@0	167	} FT_BitmapGlyphRec;
michael@0	168
michael@0	169
michael@0	170	/*************************************************************************/
michael@0	171	/* */
michael@0	172	/* <Type> */
michael@0	173	/* FT_OutlineGlyph */
michael@0	174	/* */
michael@0	175	/* <Description> */
michael@0	176	/* A handle to an object used to model an outline glyph image. This */
michael@0	177	/* is a sub-class of @FT_Glyph, and a pointer to @FT_OutlineGlyphRec. */
michael@0	178	/* */
michael@0	179	typedef struct FT_OutlineGlyphRec_* FT_OutlineGlyph;
michael@0	180
michael@0	181
michael@0	182	/*************************************************************************/
michael@0	183	/* */
michael@0	184	/* <Struct> */
michael@0	185	/* FT_OutlineGlyphRec */
michael@0	186	/* */
michael@0	187	/* <Description> */
michael@0	188	/* A structure used for outline (vectorial) glyph images. This */
michael@0	189	/* really is a `sub-class' of @FT_GlyphRec. */
michael@0	190	/* */
michael@0	191	/* <Fields> */
michael@0	192	/* root :: The root @FT_Glyph fields. */
michael@0	193	/* */
michael@0	194	/* outline :: A descriptor for the outline. */
michael@0	195	/* */
michael@0	196	/* <Note> */
michael@0	197	/* You can typecast an @FT_Glyph to @FT_OutlineGlyph if you have */
michael@0	198	/* `glyph->format == FT_GLYPH_FORMAT_OUTLINE'. This lets you access */
michael@0	199	/* the outline's content easily. */
michael@0	200	/* */
michael@0	201	/* As the outline is extracted from a glyph slot, its coordinates are */
michael@0	202	/* expressed normally in 26.6 pixels, unless the flag */
michael@0	203	/* @FT_LOAD_NO_SCALE was used in @FT_Load_Glyph() or @FT_Load_Char(). */
michael@0	204	/* */
michael@0	205	/* The outline's tables are always owned by the object and are */
michael@0	206	/* destroyed with it. */
michael@0	207	/* */
michael@0	208	typedef struct FT_OutlineGlyphRec_
michael@0	209	{
michael@0	210	FT_GlyphRec root;
michael@0	211	FT_Outline outline;
michael@0	212
michael@0	213	} FT_OutlineGlyphRec;
michael@0	214
michael@0	215
michael@0	216	/*************************************************************************/
michael@0	217	/* */
michael@0	218	/* <Function> */
michael@0	219	/* FT_Get_Glyph */
michael@0	220	/* */
michael@0	221	/* <Description> */
michael@0	222	/* A function used to extract a glyph image from a slot. Note that */
michael@0	223	/* the created @FT_Glyph object must be released with @FT_Done_Glyph. */
michael@0	224	/* */
michael@0	225	/* <Input> */
michael@0	226	/* slot :: A handle to the source glyph slot. */
michael@0	227	/* */
michael@0	228	/* <Output> */
michael@0	229	/* aglyph :: A handle to the glyph object. */
michael@0	230	/* */
michael@0	231	/* <Return> */
michael@0	232	/* FreeType error code. 0~means success. */
michael@0	233	/* */
michael@0	234	FT_EXPORT( FT_Error )
michael@0	235	FT_Get_Glyph( FT_GlyphSlot slot,
michael@0	236	FT_Glyph *aglyph );
michael@0	237
michael@0	238
michael@0	239	/*************************************************************************/
michael@0	240	/* */
michael@0	241	/* <Function> */
michael@0	242	/* FT_Glyph_Copy */
michael@0	243	/* */
michael@0	244	/* <Description> */
michael@0	245	/* A function used to copy a glyph image. Note that the created */
michael@0	246	/* @FT_Glyph object must be released with @FT_Done_Glyph. */
michael@0	247	/* */
michael@0	248	/* <Input> */
michael@0	249	/* source :: A handle to the source glyph object. */
michael@0	250	/* */
michael@0	251	/* <Output> */
michael@0	252	/* target :: A handle to the target glyph object. 0~in case of */
michael@0	253	/* error. */
michael@0	254	/* */
michael@0	255	/* <Return> */
michael@0	256	/* FreeType error code. 0~means success. */
michael@0	257	/* */
michael@0	258	FT_EXPORT( FT_Error )
michael@0	259	FT_Glyph_Copy( FT_Glyph source,
michael@0	260	FT_Glyph *target );
michael@0	261
michael@0	262
michael@0	263	/*************************************************************************/
michael@0	264	/* */
michael@0	265	/* <Function> */
michael@0	266	/* FT_Glyph_Transform */
michael@0	267	/* */
michael@0	268	/* <Description> */
michael@0	269	/* Transform a glyph image if its format is scalable. */
michael@0	270	/* */
michael@0	271	/* <InOut> */
michael@0	272	/* glyph :: A handle to the target glyph object. */
michael@0	273	/* */
michael@0	274	/* <Input> */
michael@0	275	/* matrix :: A pointer to a 2x2 matrix to apply. */
michael@0	276	/* */
michael@0	277	/* delta :: A pointer to a 2d vector to apply. Coordinates are */
michael@0	278	/* expressed in 1/64th of a pixel. */
michael@0	279	/* */
michael@0	280	/* <Return> */
michael@0	281	/* FreeType error code (if not 0, the glyph format is not scalable). */
michael@0	282	/* */
michael@0	283	/* <Note> */
michael@0	284	/* The 2x2 transformation matrix is also applied to the glyph's */
michael@0	285	/* advance vector. */
michael@0	286	/* */
michael@0	287	FT_EXPORT( FT_Error )
michael@0	288	FT_Glyph_Transform( FT_Glyph glyph,
michael@0	289	FT_Matrix* matrix,
michael@0	290	FT_Vector* delta );
michael@0	291
michael@0	292
michael@0	293	/*************************************************************************/
michael@0	294	/* */
michael@0	295	/* <Enum> */
michael@0	296	/* FT_Glyph_BBox_Mode */
michael@0	297	/* */
michael@0	298	/* <Description> */
michael@0	299	/* The mode how the values of @FT_Glyph_Get_CBox are returned. */
michael@0	300	/* */
michael@0	301	/* <Values> */
michael@0	302	/* FT_GLYPH_BBOX_UNSCALED :: */
michael@0	303	/* Return unscaled font units. */
michael@0	304	/* */
michael@0	305	/* FT_GLYPH_BBOX_SUBPIXELS :: */
michael@0	306	/* Return unfitted 26.6 coordinates. */
michael@0	307	/* */
michael@0	308	/* FT_GLYPH_BBOX_GRIDFIT :: */
michael@0	309	/* Return grid-fitted 26.6 coordinates. */
michael@0	310	/* */
michael@0	311	/* FT_GLYPH_BBOX_TRUNCATE :: */
michael@0	312	/* Return coordinates in integer pixels. */
michael@0	313	/* */
michael@0	314	/* FT_GLYPH_BBOX_PIXELS :: */
michael@0	315	/* Return grid-fitted pixel coordinates. */
michael@0	316	/* */
michael@0	317	typedef enum FT_Glyph_BBox_Mode_
michael@0	318	{
michael@0	319	FT_GLYPH_BBOX_UNSCALED = 0,
michael@0	320	FT_GLYPH_BBOX_SUBPIXELS = 0,
michael@0	321	FT_GLYPH_BBOX_GRIDFIT = 1,
michael@0	322	FT_GLYPH_BBOX_TRUNCATE = 2,
michael@0	323	FT_GLYPH_BBOX_PIXELS = 3
michael@0	324
michael@0	325	} FT_Glyph_BBox_Mode;
michael@0	326
michael@0	327
michael@0	328	/*************************************************************************/
michael@0	329	/* */
michael@0	330	/* <Enum> */
michael@0	331	/* ft_glyph_bbox_xxx */
michael@0	332	/* */
michael@0	333	/* <Description> */
michael@0	334	/* These constants are deprecated. Use the corresponding */
michael@0	335	/* @FT_Glyph_BBox_Mode values instead. */
michael@0	336	/* */
michael@0	337	/* <Values> */
michael@0	338	/* ft_glyph_bbox_unscaled :: See @FT_GLYPH_BBOX_UNSCALED. */
michael@0	339	/* ft_glyph_bbox_subpixels :: See @FT_GLYPH_BBOX_SUBPIXELS. */
michael@0	340	/* ft_glyph_bbox_gridfit :: See @FT_GLYPH_BBOX_GRIDFIT. */
michael@0	341	/* ft_glyph_bbox_truncate :: See @FT_GLYPH_BBOX_TRUNCATE. */
michael@0	342	/* ft_glyph_bbox_pixels :: See @FT_GLYPH_BBOX_PIXELS. */
michael@0	343	/* */
michael@0	344	#define ft_glyph_bbox_unscaled FT_GLYPH_BBOX_UNSCALED
michael@0	345	#define ft_glyph_bbox_subpixels FT_GLYPH_BBOX_SUBPIXELS
michael@0	346	#define ft_glyph_bbox_gridfit FT_GLYPH_BBOX_GRIDFIT
michael@0	347	#define ft_glyph_bbox_truncate FT_GLYPH_BBOX_TRUNCATE
michael@0	348	#define ft_glyph_bbox_pixels FT_GLYPH_BBOX_PIXELS
michael@0	349
michael@0	350
michael@0	351	/*************************************************************************/
michael@0	352	/* */
michael@0	353	/* <Function> */
michael@0	354	/* FT_Glyph_Get_CBox */
michael@0	355	/* */
michael@0	356	/* <Description> */
michael@0	357	/* Return a glyph's `control box'. The control box encloses all the */
michael@0	358	/* outline's points, including Bézier control points. Though it */
michael@0	359	/* coincides with the exact bounding box for most glyphs, it can be */
michael@0	360	/* slightly larger in some situations (like when rotating an outline */
michael@0	361	/* that contains Bézier outside arcs). */
michael@0	362	/* */
michael@0	363	/* Computing the control box is very fast, while getting the bounding */
michael@0	364	/* box can take much more time as it needs to walk over all segments */
michael@0	365	/* and arcs in the outline. To get the latter, you can use the */
michael@0	366	/* `ftbbox' component, which is dedicated to this single task. */
michael@0	367	/* */
michael@0	368	/* <Input> */
michael@0	369	/* glyph :: A handle to the source glyph object. */
michael@0	370	/* */
michael@0	371	/* mode :: The mode that indicates how to interpret the returned */
michael@0	372	/* bounding box values. */
michael@0	373	/* */
michael@0	374	/* <Output> */
michael@0	375	/* acbox :: The glyph coordinate bounding box. Coordinates are */
michael@0	376	/* expressed in 1/64th of pixels if it is grid-fitted. */
michael@0	377	/* */
michael@0	378	/* <Note> */
michael@0	379	/* Coordinates are relative to the glyph origin, using the y~upwards */
michael@0	380	/* convention. */
michael@0	381	/* */
michael@0	382	/* If the glyph has been loaded with @FT_LOAD_NO_SCALE, `bbox_mode' */
michael@0	383	/* must be set to @FT_GLYPH_BBOX_UNSCALED to get unscaled font */
michael@0	384	/* units in 26.6 pixel format. The value @FT_GLYPH_BBOX_SUBPIXELS */
michael@0	385	/* is another name for this constant. */
michael@0	386	/* */
michael@0	387	/* If the font is tricky and the glyph has been loaded with */
michael@0	388	/* @FT_LOAD_NO_SCALE, the resulting CBox is meaningless. To get */
michael@0	389	/* reasonable values for the CBox it is necessary to load the glyph */
michael@0	390	/* at a large ppem value (so that the hinting instructions can */
michael@0	391	/* properly shift and scale the subglyphs), then extracting the CBox, */
michael@0	392	/* which can be eventually converted back to font units. */
michael@0	393	/* */
michael@0	394	/* Note that the maximum coordinates are exclusive, which means that */
michael@0	395	/* one can compute the width and height of the glyph image (be it in */
michael@0	396	/* integer or 26.6 pixels) as: */
michael@0	397	/* */
michael@0	398	/* { */
michael@0	399	/* width = bbox.xMax - bbox.xMin; */
michael@0	400	/* height = bbox.yMax - bbox.yMin; */
michael@0	401	/* } */
michael@0	402	/* */
michael@0	403	/* Note also that for 26.6 coordinates, if `bbox_mode' is set to */
michael@0	404	/* @FT_GLYPH_BBOX_GRIDFIT, the coordinates will also be grid-fitted, */
michael@0	405	/* which corresponds to: */
michael@0	406	/* */
michael@0	407	/* { */
michael@0	408	/* bbox.xMin = FLOOR(bbox.xMin); */
michael@0	409	/* bbox.yMin = FLOOR(bbox.yMin); */
michael@0	410	/* bbox.xMax = CEILING(bbox.xMax); */
michael@0	411	/* bbox.yMax = CEILING(bbox.yMax); */
michael@0	412	/* } */
michael@0	413	/* */
michael@0	414	/* To get the bbox in pixel coordinates, set `bbox_mode' to */
michael@0	415	/* @FT_GLYPH_BBOX_TRUNCATE. */
michael@0	416	/* */
michael@0	417	/* To get the bbox in grid-fitted pixel coordinates, set `bbox_mode' */
michael@0	418	/* to @FT_GLYPH_BBOX_PIXELS. */
michael@0	419	/* */
michael@0	420	FT_EXPORT( void )
michael@0	421	FT_Glyph_Get_CBox( FT_Glyph glyph,
michael@0	422	FT_UInt bbox_mode,
michael@0	423	FT_BBox *acbox );
michael@0	424
michael@0	425
michael@0	426	/*************************************************************************/
michael@0	427	/* */
michael@0	428	/* <Function> */
michael@0	429	/* FT_Glyph_To_Bitmap */
michael@0	430	/* */
michael@0	431	/* <Description> */
michael@0	432	/* Convert a given glyph object to a bitmap glyph object. */
michael@0	433	/* */
michael@0	434	/* <InOut> */
michael@0	435	/* the_glyph :: A pointer to a handle to the target glyph. */
michael@0	436	/* */
michael@0	437	/* <Input> */
michael@0	438	/* render_mode :: An enumeration that describes how the data is */
michael@0	439	/* rendered. */
michael@0	440	/* */
michael@0	441	/* origin :: A pointer to a vector used to translate the glyph */
michael@0	442	/* image before rendering. Can be~0 (if no */
michael@0	443	/* translation). The origin is expressed in */
michael@0	444	/* 26.6 pixels. */
michael@0	445	/* */
michael@0	446	/* destroy :: A boolean that indicates that the original glyph */
michael@0	447	/* image should be destroyed by this function. It is */
michael@0	448	/* never destroyed in case of error. */
michael@0	449	/* */
michael@0	450	/* <Return> */
michael@0	451	/* FreeType error code. 0~means success. */
michael@0	452	/* */
michael@0	453	/* <Note> */
michael@0	454	/* This function does nothing if the glyph format isn't scalable. */
michael@0	455	/* */
michael@0	456	/* The glyph image is translated with the `origin' vector before */
michael@0	457	/* rendering. */
michael@0	458	/* */
michael@0	459	/* The first parameter is a pointer to an @FT_Glyph handle, that will */
michael@0	460	/* be _replaced_ by this function (with newly allocated data). */
michael@0	461	/* Typically, you would use (omitting error handling): */
michael@0	462	/* */
michael@0	463	/* */
michael@0	464	/* { */
michael@0	465	/* FT_Glyph glyph; */
michael@0	466	/* FT_BitmapGlyph glyph_bitmap; */
michael@0	467	/* */
michael@0	468	/* */
michael@0	469	/* // load glyph */
michael@0	470	/* error = FT_Load_Char( face, glyph_index, FT_LOAD_DEFAUT ); */
michael@0	471	/* */
michael@0	472	/* // extract glyph image */
michael@0	473	/* error = FT_Get_Glyph( face->glyph, &glyph ); */
michael@0	474	/* */
michael@0	475	/* // convert to a bitmap (default render mode + destroying old) */
michael@0	476	/* if ( glyph->format != FT_GLYPH_FORMAT_BITMAP ) */
michael@0	477	/* { */
michael@0	478	/* error = FT_Glyph_To_Bitmap( &glyph, FT_RENDER_MODE_NORMAL, */
michael@0	479	/* 0, 1 ); */
michael@0	480	/* if ( error ) // `glyph' unchanged */
michael@0	481	/* ... */
michael@0	482	/* } */
michael@0	483	/* */
michael@0	484	/* // access bitmap content by typecasting */
michael@0	485	/* glyph_bitmap = (FT_BitmapGlyph)glyph; */
michael@0	486	/* */
michael@0	487	/* // do funny stuff with it, like blitting/drawing */
michael@0	488	/* ... */
michael@0	489	/* */
michael@0	490	/* // discard glyph image (bitmap or not) */
michael@0	491	/* FT_Done_Glyph( glyph ); */
michael@0	492	/* } */
michael@0	493	/* */
michael@0	494	/* */
michael@0	495	/* Here another example, again without error handling: */
michael@0	496	/* */
michael@0	497	/* */
michael@0	498	/* { */
michael@0	499	/* FT_Glyph glyphs[MAX_GLYPHS] */
michael@0	500	/* */
michael@0	501	/* */
michael@0	502	/* ... */
michael@0	503	/* */
michael@0	504	/* for ( idx = 0; i < MAX_GLYPHS; i++ ) */
michael@0	505	/* error = FT_Load_Glyph( face, idx, FT_LOAD_DEFAULT ) || */
michael@0	506	/* FT_Get_Glyph ( face->glyph, &glyph[idx] ); */
michael@0	507	/* */
michael@0	508	/* ... */
michael@0	509	/* */
michael@0	510	/* for ( idx = 0; i < MAX_GLYPHS; i++ ) */
michael@0	511	/* { */
michael@0	512	/* FT_Glyph bitmap = glyphs[idx]; */
michael@0	513	/* */
michael@0	514	/* */
michael@0	515	/* ... */
michael@0	516	/* */
michael@0	517	/* // after this call, `bitmap' no longer points into */
michael@0	518	/* // the `glyphs' array (and the old value isn't destroyed) */
michael@0	519	/* FT_Glyph_To_Bitmap( &bitmap, FT_RENDER_MODE_MONO, 0, 0 ); */
michael@0	520	/* */
michael@0	521	/* ... */
michael@0	522	/* */
michael@0	523	/* FT_Done_Glyph( bitmap ); */
michael@0	524	/* } */
michael@0	525	/* */
michael@0	526	/* ... */
michael@0	527	/* */
michael@0	528	/* for ( idx = 0; i < MAX_GLYPHS; i++ ) */
michael@0	529	/* FT_Done_Glyph( glyphs[idx] ); */
michael@0	530	/* } */
michael@0	531	/* */
michael@0	532	FT_EXPORT( FT_Error )
michael@0	533	FT_Glyph_To_Bitmap( FT_Glyph* the_glyph,
michael@0	534	FT_Render_Mode render_mode,
michael@0	535	FT_Vector* origin,
michael@0	536	FT_Bool destroy );
michael@0	537
michael@0	538
michael@0	539	/*************************************************************************/
michael@0	540	/* */
michael@0	541	/* <Function> */
michael@0	542	/* FT_Done_Glyph */
michael@0	543	/* */
michael@0	544	/* <Description> */
michael@0	545	/* Destroy a given glyph. */
michael@0	546	/* */
michael@0	547	/* <Input> */
michael@0	548	/* glyph :: A handle to the target glyph object. */
michael@0	549	/* */
michael@0	550	FT_EXPORT( void )
michael@0	551	FT_Done_Glyph( FT_Glyph glyph );
michael@0	552
michael@0	553	/* */
michael@0	554
michael@0	555
michael@0	556	/* other helpful functions */
michael@0	557
michael@0	558	/*************************************************************************/
michael@0	559	/* */
michael@0	560	/* <Section> */
michael@0	561	/* computations */
michael@0	562	/* */
michael@0	563	/*************************************************************************/
michael@0	564
michael@0	565
michael@0	566	/*************************************************************************/
michael@0	567	/* */
michael@0	568	/* <Function> */
michael@0	569	/* FT_Matrix_Multiply */
michael@0	570	/* */
michael@0	571	/* <Description> */
michael@0	572	/* Perform the matrix operation `b = a*b'. */
michael@0	573	/* */
michael@0	574	/* <Input> */
michael@0	575	/* a :: A pointer to matrix `a'. */
michael@0	576	/* */
michael@0	577	/* <InOut> */
michael@0	578	/* b :: A pointer to matrix `b'. */
michael@0	579	/* */
michael@0	580	/* <Note> */
michael@0	581	/* The result is undefined if either `a' or `b' is zero. */
michael@0	582	/* */
michael@0	583	FT_EXPORT( void )
michael@0	584	FT_Matrix_Multiply( const FT_Matrix* a,
michael@0	585	FT_Matrix* b );
michael@0	586
michael@0	587
michael@0	588	/*************************************************************************/
michael@0	589	/* */
michael@0	590	/* <Function> */
michael@0	591	/* FT_Matrix_Invert */
michael@0	592	/* */
michael@0	593	/* <Description> */
michael@0	594	/* Invert a 2x2 matrix. Return an error if it can't be inverted. */
michael@0	595	/* */
michael@0	596	/* <InOut> */
michael@0	597	/* matrix :: A pointer to the target matrix. Remains untouched in */
michael@0	598	/* case of error. */
michael@0	599	/* */
michael@0	600	/* <Return> */
michael@0	601	/* FreeType error code. 0~means success. */
michael@0	602	/* */
michael@0	603	FT_EXPORT( FT_Error )
michael@0	604	FT_Matrix_Invert( FT_Matrix* matrix );
michael@0	605
michael@0	606
michael@0	607	/* */
michael@0	608
michael@0	609
michael@0	610	FT_END_HEADER
michael@0	611
michael@0	612	#endif /* __FTGLYPH_H__ */
michael@0	613
michael@0	614
michael@0	615	/* END */
michael@0	616
michael@0	617
michael@0	618	/* Local Variables: */
michael@0	619	/* coding: utf-8 */
michael@0	620	/* End: */