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+/* $Xorg: lbxopts.h,v 1.3 2000/08/18 04:05:45 coskrey Exp $ */
+/*
+ * Copyright 1994 Network Computing Devices, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name Network Computing Devices, Inc. not be
+ * used in advertising or publicity pertaining to distribution of this
+ * software without specific, written prior permission.
+ *
+ * THIS SOFTWARE IS PROVIDED `AS-IS'. NETWORK COMPUTING DEVICES, INC.,
+ * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT
+ * LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE, OR NONINFRINGEMENT. IN NO EVENT SHALL NETWORK
+ * COMPUTING DEVICES, INC., BE LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING
+ * SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOSS OF USE, DATA,
+ * OR PROFITS, EVEN IF ADVISED OF THE POSSIBILITY THEREOF, AND REGARDLESS OF
+ * WHETHER IN AN ACTION IN CONTRACT, TORT OR NEGLIGENCE, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+/* $XFree86: xc/include/extensions/lbxopts.h,v 1.5 2001/01/17 17:53:21 dawes Exp $ */
+
+#ifndef _LBX_OPTS_H_
+#define _LBX_OPTS_H_
+
+/*
+ * Negotiable configuration options
+ */
+#define LBX_OPT_DELTA_PROXY 0
+#define LBX_OPT_DELTA_SERVER 1
+#define LBX_OPT_STREAM_COMP 2
+#define LBX_OPT_BITMAP_COMP 3
+#define LBX_OPT_PIXMAP_COMP 4
+#define LBX_OPT_MSG_COMP 5 /* aka "squishing" */
+#define LBX_OPT_USE_TAGS 6
+#define LBX_OPT_CMAP_ALL 7
+#define LBX_OPT_EXTENSION 255
+
+/*
+ * Length fields are encoded in 1 or 3 bytes
+ */
+#define LBX_OPT_SMALLLEN_SIZE 1
+#define LBX_OPT_BIGLEN_SIZE 3
+#define LBX_OPT_BIGLEN_MIN 256
+
+#define LBX_OPT_DECODE_LEN(p, len, size) \
+ if ((p)[0]) { \
+ (len) = (p)[0]; \
+ (size) = LBX_OPT_SMALLLEN_SIZE; \
+ } \
+ else { \
+ (len) = ((LBX_OPT_BIGLEN_MIN + (p)[1]) << 8) | (p)[2]; \
+ (size) = LBX_OPT_BIGLEN_SIZE; \
+ }
+
+/*
+ * Option header lengths
+ */
+#define LBX_OPT_SMALLHDR_LEN (1 + LBX_OPT_SMALLLEN_SIZE)
+#define LBX_OPT_BIGHDR_LEN (1 + LBX_OPT_BIGLEN_SIZE)
+
+/*
+ * Delta compression parameters
+ */
+#define LBX_OPT_DELTA_REQLEN 6
+#define LBX_OPT_DELTA_REPLYLEN 2
+#define LBX_OPT_DELTA_NCACHE_DFLT 16
+#define LBX_OPT_DELTA_MSGLEN_MIN 32
+#define LBX_OPT_DELTA_MSGLEN_DFLT 64
+
+
+/*
+ * Stream compression opts
+ */
+
+#include <sys/types.h>
+
+#if defined(WIN32) || (defined(USG) && !defined(CRAY) && !defined(umips) && !defined(MOTOROLA) && !defined(uniosu) && !defined(__sxg__))
+
+struct iovec {
+ caddr_t iov_base;
+ int iov_len;
+};
+
+#else
+#ifndef Lynx
+#include <sys/uio.h>
+#else
+#include <uio.h>
+#endif
+#endif
+
+typedef void *LbxStreamCompHandle;
+
+typedef struct _LbxStreamOpts {
+ LbxStreamCompHandle (*streamCompInit)(int fd, pointer arg);
+ pointer streamCompArg;
+ int (*streamCompStuffInput)(
+ int fd,
+ unsigned char *buf,
+ int buflen
+ );
+ int (*streamCompInputAvail)(
+ int fd
+ );
+ int (*streamCompFlush)(
+ int fd
+ );
+ int (*streamCompRead)(
+ int fd,
+ unsigned char *buf,
+ int buflen
+ );
+ int (*streamCompWriteV)(
+ int fd,
+ struct iovec *iov,
+ int iovcnt
+ );
+ void (*streamCompOn)(
+ int fd
+ );
+ void (*streamCompOff)(
+ int fd
+ );
+ void (*streamCompFreeHandle)(
+ LbxStreamCompHandle handle
+ );
+} LbxStreamOpts;
+
+#endif /* _LBX_OPTS_H_ */