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Annotation of 43BSD/contrib/X/libqvss/ddxpacket.c, revision 1.1

1.1     ! root        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: }
        !            88: 
        !            89: 

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