1/***********************************************************
2
3Copyright 1987, 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
25Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
26
27                        All Rights Reserved
28
29Permission to use, copy, modify, and distribute this software and its
30documentation for any purpose and without fee is hereby granted,
31provided that the above copyright notice appear in all copies and that
32both that copyright notice and this permission notice appear in
33supporting documentation, and that the name of Digital not be
34used in advertising or publicity pertaining to distribution of the
35software without specific, written prior permission.
36
37DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
43SOFTWARE.
44
45******************************************************************/
46
47#ifndef SERVERMD_H
48#define SERVERMD_H 1
49
50#if !defined(_DIX_CONFIG_H_) && !defined(_XORG_SERVER_H_)
51#error Drivers must include xorg-server.h before any other xserver headers
52#error xserver code must include dix-config.h before any other headers
53#endif
54
55#include <X11/Xarch.h>		/* for X_LITTLE_ENDIAN/X_BIG_ENDIAN */
56
57#if X_BYTE_ORDER == X_LITTLE_ENDIAN
58#define IMAGE_BYTE_ORDER        LSBFirst
59#define BITMAP_BIT_ORDER        LSBFirst
60#elif X_BYTE_ORDER == X_BIG_ENDIAN
61#define IMAGE_BYTE_ORDER        MSBFirst
62#define BITMAP_BIT_ORDER        MSBFirst
63#else
64#error "Too weird to live."
65#endif
66
67#ifndef GLYPHPADBYTES
68#define GLYPHPADBYTES           4
69#endif
70
71/* size of buffer to use with GetImage, measured in bytes. There's obviously
72 * a trade-off between the amount of heap used and the number of times the
73 * ddx routine has to be called.
74 */
75#ifndef IMAGE_BUFSIZE
76#define IMAGE_BUFSIZE		(64*1024)
77#endif
78
79/* pad scanline to a longword */
80#ifndef BITMAP_SCANLINE_UNIT
81#define BITMAP_SCANLINE_UNIT	32
82#endif
83
84#ifndef BITMAP_SCANLINE_PAD
85#define BITMAP_SCANLINE_PAD  32
86#define LOG2_BITMAP_PAD		5
87#define LOG2_BYTES_PER_SCANLINE_PAD	2
88#endif
89
90#include <X11/Xfuncproto.h>
91/*
92 *   This returns the number of padding units, for depth d and width w.
93 * For bitmaps this can be calculated with the macros above.
94 * Other depths require either grovelling over the formats field of the
95 * screenInfo or hardwired constants.
96 */
97
98typedef struct _PaddingInfo {
99    int padRoundUp;             /* pixels per pad unit - 1 */
100    int padPixelsLog2;          /* log 2 (pixels per pad unit) */
101    int padBytesLog2;           /* log 2 (bytes per pad unit) */
102    int notPower2;              /* bitsPerPixel not a power of 2 */
103    int bytesPerPixel;          /* only set when notPower2 is TRUE */
104    int bitsPerPixel;           /* bits per pixel */
105} PaddingInfo;
106extern _X_EXPORT PaddingInfo PixmapWidthPaddingInfo[];
107
108/* The only portable way to get the bpp from the depth is to look it up */
109#define BitsPerPixel(d) (PixmapWidthPaddingInfo[d].bitsPerPixel)
110
111#define PixmapWidthInPadUnits(w, d) \
112    (PixmapWidthPaddingInfo[d].notPower2 ? \
113    (((int)(w) * PixmapWidthPaddingInfo[d].bytesPerPixel +  \
114	         PixmapWidthPaddingInfo[d].bytesPerPixel) >> \
115	PixmapWidthPaddingInfo[d].padBytesLog2) : \
116    ((int)((w) + PixmapWidthPaddingInfo[d].padRoundUp) >> \
117	PixmapWidthPaddingInfo[d].padPixelsLog2))
118
119/*
120 *	Return the number of bytes to which a scanline of the given
121 * depth and width will be padded.
122 */
123#define PixmapBytePad(w, d) \
124    (PixmapWidthInPadUnits(w, d) << PixmapWidthPaddingInfo[d].padBytesLog2)
125
126#define BitmapBytePad(w) \
127    (((int)((w) + BITMAP_SCANLINE_PAD - 1) >> LOG2_BITMAP_PAD) << LOG2_BYTES_PER_SCANLINE_PAD)
128
129#endif                          /* SERVERMD_H */
130