components/x11/libdga/src/dga_pixshared.h

   1 /* Copyright (c) 1993, 1998, Oracle and/or its affiliates. All rights reserved.
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a
   4  * copy of this software and associated documentation files (the "Software"),
   5  * to deal in the Software without restriction, including without limitation
   6  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   7  * and/or sell copies of the Software, and to permit persons to whom the
   8  * Software is furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice (including the next
  11  * paragraph) shall be included in all copies or substantial portions of the
  12  * Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20  * DEALINGS IN THE SOFTWARE.
  21  */
  22
  23
  24 #ifndef _DGA_PIXSHARED_H
  25 #define _DGA_PIXSHARED_H
  26
  27 /*
  28  * dga_pixshared.h - Sun Direct Graphics Access shared page include file.
  29  */
  30
  31 /* Below is the definition of the pixmap shared page structure plus all
  32  * the other misc. definitions and structures that are used in both the
  33  * server and dga client library.
  34  *
  35  *  Shared Pixmap Information.  This structure contains the information
  36  *  necessary to allow the server and client to share access to a DGA
  37  *  pixmap .  This information is located in the first page of
  38  *  the shared memory created by the server in response to a call to
  39  *  XDgaGrabPixmap().  The server communicates the current state
  40  *  of the shared pixmap to the client through the fields within
  41  *  this structure.
  42  */
  43
  44 typedef u_int *PX_LOCKP_T;
  45
  46 #define PXMPMAGIC 0x50584D50 /* "PXMP"=0x50584D50 */
  47 #define PXMPVERS        0       /* Current version number */
  48
  49 typedef struct shpx_entry_0 {
  50     u_int s_fd;           /* server's file descriptor */
  51     u_int offset;         /* offset to first pixmap info struct*/
  52     u_int s_size;         /* current total file size */
  53 } SHPX_ENTRY_0;
  54
  55 typedef struct shpx_entry_1 {
  56     int   s_num_shpx;     /* current number of shared pixmaps */
  57     u_int s_dir_seq;      /* server's shpx directory change cnt*/
  58     u_int s_next_offset;  /* server's next avail offset */
  59 } SHPX_ENTRY_1;
  60
  61 typedef struct shpx_entry {
  62     u_int xid;            /* xid of shared pixmap */
  63     u_int offset;         /* offset to info struct */
  64     u_int size;           /* total size of this pixmap */
  65 } SHPX_ENTRY;
  66
  67 typedef union shpx_directory {
  68     SHPX_ENTRY_0 shpx_entry_0;
  69     SHPX_ENTRY_1 shpx_entry_1;
  70     SHPX_ENTRY shpx_entry;
  71 } SHPX_DIRECTORY;
  72
  73 typedef struct shared_pixmap_info {
  74     u_int   magic;        /* magic number, "PXMP"=0x50584D50 */
  75     u_char  version;      /* version, currently 0 */
  76     u_char  obsolete;     /* pixmap info obsolete flag */
  77     u_char  device;       /* device type identifier from fbio.h ???*/
  78     u_char  cached;       /* 1 = pixels cached on hw; 0 = pixels in mem */
  79     u_int   s_cacheseq;   /* server's cache sequence count */
  80     u_int   s_modified;   /* server has changed this data struct*/
  81     u_int   data_offset;  /* offset to pixel data */
  82     u_int   device_offset;      /* offset to device specific section */
  83     short   width;        /* pixmap width */
  84     short   height;       /* pixmap height */
  85     u_int   linebytes;    /* bytes per scanline */
  86     u_char  depth;        /* pixmap depth */
  87     u_char  bitsperpixel;   /* pixmap bitsPerPixel */
  88     u_char  pad1[2];        /* Unused pad area */
  89     u_int   s_fd;         /* server's file descriptor */
  90     u_int   s_size;       /* server's size of pixel array */
  91     u_int   s_dir_index;  /* server's shpx directory index */
  92     SHPX_DIRECTORY  *s_shpx_dir;    /* server's pointer to shpx dir */
  93     u_char  *s_pixels;    /* server shared pixel memory pointer*/
  94     u_char  scr_name[32]; /* screen name for cached pixmap */
  95     u_char  fn[256];      /* Shared file name */
  96     u_int   p_refcnt;     /* for nested locking */
  97     PX_LOCKP_T   p_lockp;       /* pointer to lockpage */
  98     PX_LOCKP_T   p_unlockp;     /* pointer to unlockpage */
  99     uint32_t  p_cookie;        /* "cookie" for lock pages */
 100     int     locktype;       /* type of locking */
 101     u_int   s_devinfoseq;   /* indicates change to dev_info */
 102     /* DO NOT ADD ANYTHING BELOW dev_info  - if you need to any any
 103      * thing, do so after this line and above dev_info
 104     */
 105     char dev_info[32];    /* device specific information */
 106 } SHARED_PIXMAP_INFO;
 107
 108 #endif /* _DGA_PIXSHARED_H */