format.c revision 23a0898a 
1/* $Xorg: format.c,v 1.4 2001/02/09 02:04:04 xorgcvs Exp $ */
2/*
3 * Copyright 1990, 1991 Network Computing Devices;
4 * Portions Copyright 1987 by Digital Equipment Corporation
5 *
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that
9 * copyright notice and this permission notice appear in supporting
10 * documentation, and that the names of Network Computing Devices or Digital
11 * not be used in advertising or publicity pertaining to distribution of the
12 * software without specific, written prior permission. Network Computing
13 * Devices and Digital make no representations about the suitability of
14 * this software for any purpose.  It is provided "as is" without express
15 * or implied warranty.
16 *
17 * NETWORK COMPUTING DEVICES AND DIGITAL DISCLAIM ALL WARRANTIES WITH
18 * REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
19 * AND FITNESS, IN NO EVENT SHALL NETWORK COMPUTING DEVICES OR DIGITAL BE
20 * LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
21 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
22 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
23 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
24 */
25
26/*
27
28Copyright 1987, 1998  The Open Group
29
30Permission to use, copy, modify, distribute, and sell this software and its
31documentation for any purpose is hereby granted without fee, provided that
32the above copyright notice appear in all copies and that both that
33copyright notice and this permission notice appear in supporting
34documentation.
35
36The above copyright notice and this permission notice shall be included
37in all copies or substantial portions of the Software.
38
39THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
40OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
41MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
42IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
43OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
44ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
45OTHER DEALINGS IN THE SOFTWARE.
46
47Except as contained in this notice, the name of The Open Group shall
48not be used in advertising or otherwise to promote the sale, use or
49other dealings in this Software without prior written authorization
50from The Open Group.
51
52*/
53/* $XFree86: xc/lib/font/util/format.c,v 1.4 2001/01/17 19:43:33 dawes Exp $ */
54
55#ifdef HAVE_CONFIG_H
56#include <config.h>
57#endif
58#include	<X11/fonts/FSproto.h>
59#include	<X11/fonts/font.h>
60#include	<X11/fonts/fontstruct.h>
61#include	<X11/fonts/fontutil.h>
62
63int
64CheckFSFormat(fsBitmapFormat format,
65	      fsBitmapFormatMask fmask,
66	      int *bit_order,
67	      int *byte_order,
68	      int *scan,
69	      int *glyph,
70	      int *image)
71{
72    /* convert format to what the low levels want */
73    if (fmask & BitmapFormatMaskBit) {
74	*bit_order = format & BitmapFormatBitOrderMask;
75	*bit_order = (*bit_order == BitmapFormatBitOrderMSB)
76	    	     ? MSBFirst : LSBFirst;
77    }
78    if (fmask & BitmapFormatMaskByte) {
79	*byte_order = format & BitmapFormatByteOrderMask;
80	*byte_order = (*byte_order == BitmapFormatByteOrderMSB)
81	    	      ? MSBFirst : LSBFirst;
82    }
83    if (fmask & BitmapFormatMaskScanLineUnit) {
84	*scan = format & BitmapFormatScanlineUnitMask;
85	/* convert byte paddings into byte counts */
86	switch (*scan) {
87	case BitmapFormatScanlineUnit8:
88	    *scan = 1;
89	    break;
90	case BitmapFormatScanlineUnit16:
91	    *scan = 2;
92	    break;
93	case BitmapFormatScanlineUnit32:
94	    *scan = 4;
95	    break;
96	default:
97	    return BadFontFormat;
98	}
99    }
100    if (fmask & BitmapFormatMaskScanLinePad) {
101	*glyph = format & BitmapFormatScanlinePadMask;
102	/* convert byte paddings into byte counts */
103	switch (*glyph) {
104	case BitmapFormatScanlinePad8:
105	    *glyph = 1;
106	    break;
107	case BitmapFormatScanlinePad16:
108	    *glyph = 2;
109	    break;
110	case BitmapFormatScanlinePad32:
111	    *glyph = 4;
112	    break;
113	default:
114	    return BadFontFormat;
115	}
116    }
117    if (fmask & BitmapFormatMaskImageRectangle) {
118	*image = format & BitmapFormatImageRectMask;
119
120	if (*image != BitmapFormatImageRectMin &&
121		*image != BitmapFormatImageRectMaxWidth &&
122		*image != BitmapFormatImageRectMax)
123	    return BadFontFormat;
124    }
125    return Successful;
126}
127