bitmapfunc.c revision 7f7f5e4e 
1/* $Xorg: bitmapfunc.c,v 1.5 2001/02/09 02:04:02 xorgcvs Exp $ */
2
3/*
4
5Copyright 1991, 1998  The Open Group
6
7Permission to use, copy, modify, distribute, and sell this software and its
8documentation for any purpose is hereby granted without fee, provided that
9the above copyright notice appear in all copies and that both that
10copyright notice and this permission notice appear in supporting
11documentation.
12
13The above copyright notice and this permission notice shall be included in
14all copies or substantial portions of the Software.
15
16THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
19OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
20AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22
23Except as contained in this notice, the name of The Open Group shall not be
24used in advertising or otherwise to promote the sale, use or other dealings
25in this Software without prior written authorization from The Open Group.
26
27*/
28
29/* $XFree86: xc/lib/font/bitmap/bitmapfunc.c,v 3.17 2002/09/19 13:21:58 tsi Exp $ */
30
31/*
32 * Author:  Keith Packard, MIT X Consortium
33 */
34
35#ifdef HAVE_CONFIG_H
36#include <config.h>
37#endif
38
39/*
40 * Translate monolithic #defines to modular definitions
41 */
42
43#ifdef PCFFORMAT
44#define XFONT_PCFFORMAT 1
45#endif
46
47#ifdef SNFFORMAT
48#define XFONT_SNFFORMAT 1
49#endif
50
51#ifdef BDFFORMAT
52#define XFONT_BDFFORMAT 1
53#endif
54
55#include <X11/fonts/fntfilst.h>
56#include <X11/fonts/bitmap.h>
57#include <X11/fonts/fontutil.h>
58#include <X11/fonts/bdfint.h>
59#include <X11/fonts/pcf.h>
60#include "snfstr.h"
61
62typedef struct _BitmapFileFunctions {
63    int         (*ReadFont) (FontPtr /* pFont */, FontFilePtr /* file */,
64			     int /* bit */, int /* byte */,
65			     int /* glyph */, int /* scan */);
66    int         (*ReadInfo) (  FontInfoPtr /* pFontInfo */,
67			       FontFilePtr /* file */ );
68}           BitmapFileFunctionsRec, *BitmapFileFunctionsPtr;
69
70static int BitmapGetRenderIndex(FontRendererPtr renderer);
71
72/*
73 * the readers[] and renderers[] arrays must be in the same order,
74 * and also in the same order as scale[] and find_scale[] in bitscale.c
75 *
76 */
77static BitmapFileFunctionsRec readers[] = {
78#if XFONT_PCFFORMAT
79    { pcfReadFont, pcfReadFontInfo} ,
80    { pcfReadFont, pcfReadFontInfo} ,
81# ifdef X_GZIP_FONT_COMPRESSION
82    { pcfReadFont, pcfReadFontInfo} ,
83# endif
84# ifdef X_BZIP2_FONT_COMPRESSION
85    { pcfReadFont, pcfReadFontInfo} ,
86# endif
87#endif
88#if XFONT_SNFFORMAT
89    { snfReadFont, snfReadFontInfo},
90    { snfReadFont, snfReadFontInfo},
91# ifdef X_GZIP_FONT_COMPRESSION
92    { snfReadFont, snfReadFontInfo} ,
93# endif
94# ifdef X_BZIP2_FONT_COMPRESSION
95    { snfReadFont, snfReadFontInfo} ,
96# endif
97#endif
98#if XFONT_BDFFORMAT
99    { bdfReadFont, bdfReadFontInfo} ,
100    { bdfReadFont, bdfReadFontInfo} ,
101# ifdef X_GZIP_FONT_COMPRESSION
102    { bdfReadFont, bdfReadFontInfo} ,
103# endif
104# ifdef X_BZIP2_FONT_COMPRESSION
105    { bdfReadFont, bdfReadFontInfo} ,
106# endif
107#endif
108};
109
110
111#define CAPABILITIES (CAP_MATRIX | CAP_CHARSUBSETTING)
112
113static int
114BitmapOpenBitmap (FontPathElementPtr fpe, FontPtr *ppFont, int flags,
115		  FontEntryPtr entry, char *fileName,
116		  fsBitmapFormat format, fsBitmapFormatMask fmask,
117		  FontPtr non_cachable_font) /* We don't do licensing */
118{
119    FontFilePtr	file;
120    FontPtr     pFont;
121    int         i;
122    int         ret;
123    int         bit,
124                byte,
125                glyph,
126                scan,
127		image;
128
129    i = BitmapGetRenderIndex(entry->u.bitmap.renderer);
130    file = FontFileOpen (fileName);
131    if (!file)
132	return BadFontName;
133    if (!(pFont = CreateFontRec())) {
134	fprintf(stderr, "Error: Couldn't allocate pFont (%ld)\n",
135		(unsigned long)sizeof(FontRec));
136	FontFileClose (file);
137	return AllocError;
138    }
139    /* set up default values */
140    FontDefaultFormat(&bit, &byte, &glyph, &scan);
141    /* get any changes made from above */
142    ret = CheckFSFormat(format, fmask, &bit, &byte, &scan, &glyph, &image);
143
144    /* Fill in font record. Data format filled in by reader. */
145    pFont->refcnt = 0;
146
147    ret = (*readers[i].ReadFont) (pFont, file, bit, byte, glyph, scan);
148
149    FontFileClose (file);
150    if (ret != Successful) {
151	free(pFont);
152    } else {
153	*ppFont = pFont;
154    }
155    return ret;
156}
157
158static int
159BitmapGetInfoBitmap (FontPathElementPtr fpe, FontInfoPtr pFontInfo,
160		     FontEntryPtr entry, char *fileName)
161{
162    FontFilePtr file;
163    int		i;
164    int		ret;
165    FontRendererPtr renderer;
166
167    renderer = FontFileMatchRenderer (fileName);
168    if (!renderer)
169	return BadFontName;
170    i = BitmapGetRenderIndex(renderer);
171    file = FontFileOpen (fileName);
172    if (!file)
173	return BadFontName;
174    ret = (*readers[i].ReadInfo) (pFontInfo, file);
175    FontFileClose (file);
176    return ret;
177}
178
179static FontRendererRec	renderers[] = {
180#if XFONT_PCFFORMAT
181    { ".pcf", 4, BitmapOpenBitmap, BitmapOpenScalable,
182	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
183	CAPABILITIES },
184    { ".pcf.Z", 6, BitmapOpenBitmap, BitmapOpenScalable,
185	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
186	CAPABILITIES },
187# ifdef X_GZIP_FONT_COMPRESSION
188    { ".pcf.gz", 7,
189	BitmapOpenBitmap, BitmapOpenScalable,
190	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
191	CAPABILITIES },
192# endif
193# ifdef X_BZIP2_FONT_COMPRESSION
194    { ".pcf.bz2", 8,
195	BitmapOpenBitmap, BitmapOpenScalable,
196	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
197	CAPABILITIES },
198# endif
199#endif
200#if XFONT_SNFFORMAT
201    { ".snf", 4, BitmapOpenBitmap, BitmapOpenScalable,
202	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
203	CAPABILITIES },
204    { ".snf.Z", 6, BitmapOpenBitmap, BitmapOpenScalable,
205	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
206	CAPABILITIES },
207# ifdef X_GZIP_FONT_COMPRESSION
208    { ".snf.gz", 7, BitmapOpenBitmap, BitmapOpenScalable,
209	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
210	CAPABILITIES },
211# endif
212# ifdef X_BZIP2_FONT_COMPRESSION
213    { ".snf.bz2", 8, BitmapOpenBitmap, BitmapOpenScalable,
214	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
215	CAPABILITIES },
216# endif
217#endif
218#if XFONT_BDFFORMAT
219    { ".bdf", 4, BitmapOpenBitmap, BitmapOpenScalable,
220	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
221	CAPABILITIES },
222    { ".bdf.Z", 6, BitmapOpenBitmap, BitmapOpenScalable,
223	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
224	CAPABILITIES },
225# ifdef X_GZIP_FONT_COMPRESSION
226    { ".bdf.gz", 7, BitmapOpenBitmap, BitmapOpenScalable,
227	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
228	CAPABILITIES },
229# endif
230# ifdef X_BZIP2_FONT_COMPRESSION
231    { ".bdf.bz2", 8, BitmapOpenBitmap, BitmapOpenScalable,
232	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
233	CAPABILITIES },
234# endif
235#endif
236};
237
238#define numRenderers	(sizeof renderers / sizeof renderers[0])
239
240void
241BitmapRegisterFontFileFunctions (void)
242{
243    int	    i;
244
245    for (i = 0; i < numRenderers; i++)
246	FontFileRegisterRenderer (&renderers[i]);
247}
248
249/*
250 * compute offset into renderers array - used to find the font reader,
251 * the font info reader, and the bitmap scaling routine.  All users
252 * of this routine must be kept in step with the renderer array.
253 */
254static int
255BitmapGetRenderIndex(FontRendererPtr renderer)
256{
257    return renderer - renderers;
258}
259