bitmapfunc.c revision 0145ab54 
1/*
2
3Copyright 1991, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25*/
26
27/*
28 * Author:  Keith Packard, MIT X Consortium
29 */
30
31#ifdef HAVE_CONFIG_H
32#include <config.h>
33#endif
34
35#include <X11/fonts/fntfilst.h>
36#include <X11/fonts/bitmap.h>
37#include <X11/fonts/fontutil.h>
38#if XFONT_BDFFORMAT
39#include <X11/fonts/bdfint.h>
40#endif
41#if XFONT_PCFFORMAT
42#include <X11/fonts/pcf.h>
43#endif
44#if XFONT_SNFFORMAT
45#include "snfstr.h"
46#endif
47
48#if XFONT_PCFFORMAT || XFONT_SNFFORMAT || XFONT_BDFFORMAT
49typedef struct _BitmapFileFunctions {
50    int         (*ReadFont) (FontPtr /* pFont */, FontFilePtr /* file */,
51			     int /* bit */, int /* byte */,
52			     int /* glyph */, int /* scan */);
53    int         (*ReadInfo) (  FontInfoPtr /* pFontInfo */,
54			       FontFilePtr /* file */ );
55}           BitmapFileFunctionsRec, *BitmapFileFunctionsPtr;
56
57static int BitmapGetRenderIndex(FontRendererPtr renderer);
58
59/*
60 * the readers[] and renderers[] arrays must be in the same order,
61 * and also in the same order as scale[] and find_scale[] in bitscale.c
62 *
63 */
64static BitmapFileFunctionsRec readers[] = {
65#if XFONT_PCFFORMAT
66    { pcfReadFont, pcfReadFontInfo} ,
67    { pcfReadFont, pcfReadFontInfo} ,
68# ifdef X_GZIP_FONT_COMPRESSION
69    { pcfReadFont, pcfReadFontInfo} ,
70# endif
71# ifdef X_BZIP2_FONT_COMPRESSION
72    { pcfReadFont, pcfReadFontInfo} ,
73# endif
74#endif
75#if XFONT_SNFFORMAT
76    { snfReadFont, snfReadFontInfo},
77    { snfReadFont, snfReadFontInfo},
78# ifdef X_GZIP_FONT_COMPRESSION
79    { snfReadFont, snfReadFontInfo} ,
80# endif
81# ifdef X_BZIP2_FONT_COMPRESSION
82    { snfReadFont, snfReadFontInfo} ,
83# endif
84#endif
85#if XFONT_BDFFORMAT
86    { bdfReadFont, bdfReadFontInfo} ,
87    { bdfReadFont, bdfReadFontInfo} ,
88# ifdef X_GZIP_FONT_COMPRESSION
89    { bdfReadFont, bdfReadFontInfo} ,
90# endif
91# ifdef X_BZIP2_FONT_COMPRESSION
92    { bdfReadFont, bdfReadFontInfo} ,
93# endif
94#endif
95};
96
97
98#define CAPABILITIES (CAP_MATRIX | CAP_CHARSUBSETTING)
99
100static int
101BitmapOpenBitmap (FontPathElementPtr fpe, FontPtr *ppFont, int flags,
102		  FontEntryPtr entry, char *fileName,
103		  fsBitmapFormat format, fsBitmapFormatMask fmask,
104		  FontPtr non_cachable_font) /* We don't do licensing */
105{
106    FontFilePtr	file;
107    FontPtr     pFont;
108    int         i;
109    int         ret;
110    int         bit,
111                byte,
112                glyph,
113                scan,
114		image;
115
116    i = BitmapGetRenderIndex(entry->u.bitmap.renderer);
117    file = FontFileOpen (fileName);
118    if (!file)
119	return BadFontName;
120    if (!(pFont = CreateFontRec())) {
121	fprintf(stderr, "Error: Couldn't allocate pFont (%ld)\n",
122		(unsigned long)sizeof(FontRec));
123	FontFileClose (file);
124	return AllocError;
125    }
126    /* set up default values */
127    FontDefaultFormat(&bit, &byte, &glyph, &scan);
128    /* get any changes made from above */
129    ret = CheckFSFormat(format, fmask, &bit, &byte, &scan, &glyph, &image);
130
131    /* Fill in font record. Data format filled in by reader. */
132    pFont->refcnt = 0;
133
134    ret = (*readers[i].ReadFont) (pFont, file, bit, byte, glyph, scan);
135
136    FontFileClose (file);
137    if (ret != Successful) {
138	free(pFont);
139    } else {
140	*ppFont = pFont;
141    }
142    return ret;
143}
144
145static int
146BitmapGetInfoBitmap (FontPathElementPtr fpe, FontInfoPtr pFontInfo,
147		     FontEntryPtr entry, char *fileName)
148{
149    FontFilePtr file;
150    int		i;
151    int		ret;
152    FontRendererPtr renderer;
153
154    renderer = FontFileMatchRenderer (fileName);
155    if (!renderer)
156	return BadFontName;
157    i = BitmapGetRenderIndex(renderer);
158    file = FontFileOpen (fileName);
159    if (!file)
160	return BadFontName;
161    ret = (*readers[i].ReadInfo) (pFontInfo, file);
162    FontFileClose (file);
163    return ret;
164}
165
166static FontRendererRec	renderers[] = {
167#if XFONT_PCFFORMAT
168    { ".pcf", 4, BitmapOpenBitmap, BitmapOpenScalable,
169	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
170	CAPABILITIES },
171    { ".pcf.Z", 6, BitmapOpenBitmap, BitmapOpenScalable,
172	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
173	CAPABILITIES },
174# ifdef X_GZIP_FONT_COMPRESSION
175    { ".pcf.gz", 7,
176	BitmapOpenBitmap, BitmapOpenScalable,
177	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
178	CAPABILITIES },
179# endif
180# ifdef X_BZIP2_FONT_COMPRESSION
181    { ".pcf.bz2", 8,
182	BitmapOpenBitmap, BitmapOpenScalable,
183	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
184	CAPABILITIES },
185# endif
186#endif
187#if XFONT_SNFFORMAT
188    { ".snf", 4, BitmapOpenBitmap, BitmapOpenScalable,
189	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
190	CAPABILITIES },
191    { ".snf.Z", 6, BitmapOpenBitmap, BitmapOpenScalable,
192	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
193	CAPABILITIES },
194# ifdef X_GZIP_FONT_COMPRESSION
195    { ".snf.gz", 7, BitmapOpenBitmap, BitmapOpenScalable,
196	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
197	CAPABILITIES },
198# endif
199# ifdef X_BZIP2_FONT_COMPRESSION
200    { ".snf.bz2", 8, BitmapOpenBitmap, BitmapOpenScalable,
201	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
202	CAPABILITIES },
203# endif
204#endif
205#if XFONT_BDFFORMAT
206    { ".bdf", 4, BitmapOpenBitmap, BitmapOpenScalable,
207	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
208	CAPABILITIES },
209    { ".bdf.Z", 6, BitmapOpenBitmap, BitmapOpenScalable,
210	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
211	CAPABILITIES },
212# ifdef X_GZIP_FONT_COMPRESSION
213    { ".bdf.gz", 7, BitmapOpenBitmap, BitmapOpenScalable,
214	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
215	CAPABILITIES },
216# endif
217# ifdef X_BZIP2_FONT_COMPRESSION
218    { ".bdf.bz2", 8, BitmapOpenBitmap, BitmapOpenScalable,
219	BitmapGetInfoBitmap, BitmapGetInfoScalable, 0,
220	CAPABILITIES },
221# endif
222#endif
223};
224
225#define numRenderers	(sizeof renderers / sizeof renderers[0])
226
227void
228BitmapRegisterFontFileFunctions (void)
229{
230    int	    i;
231
232    for (i = 0; i < numRenderers; i++)
233	FontFileRegisterRenderer (&renderers[i]);
234}
235
236/*
237 * compute offset into renderers array - used to find the font reader,
238 * the font info reader, and the bitmap scaling routine.  All users
239 * of this routine must be kept in step with the renderer array.
240 */
241static int
242BitmapGetRenderIndex(FontRendererPtr renderer)
243{
244    return renderer - renderers;
245}
246
247#else
248void
249BitmapRegisterFontFileFunctions (void)
250{
251    /* nothing to do */
252}
253#endif /* XFONT_PCFFORMAT || XFONT_SNFFORMAT || XFONT_BDFFORMAT */
254