4.3BSD - /usr/src/new/X/libqvss/ddxpacket.c

   1: /* packet.c	Routines to allocate, free, and use packets
   2:  *
   3:  *	OpenDisplay		Open it
   4:  *	InitDisplay		Download it
   5:  *	DisplayDead		Check if dead
   6:  *	Allocate_space		Allocate some temporary storage
   7:  *	Deallocate_space	Flush space of unsent packet
   8:  *
   9:  */
  10: 
  11: 
  12: #include <stdio.h>
  13: #include <fcntl.h>
  14: #include <errno.h>
  15: #include <sys/types.h>
  16: #include <sys/ioctl.h>
  17: #include "ddxqvss.h"
  18: #include <vaxuba/qvioctl.h>
  19: 
  20: vsIoAddr *VSAddr;
  21: vsEvent *VSEvent;
  22: int VSqMax;
  23: 
  24: BITMAP pbm;     /* the actual screen memory    */
  25: BITMAP vbm;     /* the size of the root window */
  26: caddr_t ltable[YSIZE];  /* line address table	       */
  27: 
  28: int vsdev = -1;
  29: extern int errno;
  30: 
  31: /* Open the display */
  32: 
  33: /*ARGSUSED*/
  34: OpenDisplay (vsNumber)
  35:     char *vsNumber;
  36: {
  37:     char vsname[10];
  38: 
  39:     return(vsdev = open ("/dev/mouse", O_RDWR|O_NDELAY));
  40: }
  41: 
  42: /* Do qvss specific initialization */
  43: 
  44: InitDisplay (info)
  45:     register DEVICE *info;
  46: {
  47:     register int i;
  48:     if (ioctl(vsdev,QIOCADDR,&VSAddr) == -1) return(-1);
  49:     if (ioctl(vsdev,QIOCINIT,0) == -1) return(-1);
  50:     VSEvent = VSAddr->ibuff;
  51:     VSqMax = VSAddr->iqsize - 1;
  52:     vbm.data = VSAddr->bitmap;
  53:     vbm.width = VSAddr->max_x;
  54:     vbm.height = VSAddr->max_y;
  55:     pbm.data = VSAddr->bitmap;
  56:     pbm.width = 1024;
  57:     pbm.height = VSAddr->max_y;
  58:     for(i = 0; i < YSIZE; i++)  ltable[i] = VSAddr->bitmap + (i * XSIZE);
  59:     info->id = XDEV_QVSS;
  60:     info->width = vbm.width;
  61:     info->height = vbm.height;
  62:     info->planes = 1;
  63:     info->entries = 0;
  64:     info->mouse = &VSAddr->mouse;
  65:     info->mbox  = &VSAddr->mbox;
  66:     info->queue = (vsEventQueue *) &VSAddr->ibuff;
  67:     return (0);
  68: }
  69: 
  70: /* Check if display is dead */
  71: 
  72: DisplayDead ()
  73: {
  74:     return(0);
  75: }
  76: 
  77: /* the presumption here is that only one Allocate_space call is made/request */
  78: 
  79: #define ABUFSIZE 3072
  80: static char ABuffer[3072];  /* random size buffer for allocate space */
  81: caddr_t AllocateSpace (size)
  82:     register int size;
  83: {
  84:     if (size < ABUFSIZE) return(ABuffer);
  85:     errno = ENOMEM;
  86:     return (NULL);
  87: }

Defined functions

Defined variables

Defined macros