init_vip(char *name)
{
if (name == NULL || name[0] == 0)
return(0);
if ((vdh.alloced = load_exe(name, &vdh.eh)) != NULL)
{
zero_structure(&vdh.vh, sizeof(vdh.vh) );
vdh.vh.vip_magic = DVIP_MAGIC;
(*vdh.eh.entry_point)(&vdh.vh, continu_box);
if (vdh.vh.vip_magic != VIP_MAGIC)
{
continu_line("Bad tablet driver protocol.");
freemem(vdh.alloced);
return(0);
}
if (!(*vdh.vh.init_vip_device)(&vdh.vh, continu_box))
{
char *bufs[3];
bufs[0] = name;
bufs[1] = "Tablet not attatched";
bufs[2] = NULL;
continu_box(bufs);
freemem(vdh.alloced);
return(0);
}
return(1);
}
}
verify_exe_head(int file, Exe_head *exe)
{
if (!test_exe_head(file, exe))
{
continu_line("Not a good tablet driver.");
return(0);
}
return(1);
}
open_verify_vision()
{
int i;
if ((bopen(vision_name, &vision_bf)) == 0)
{
cant_find(vision_name);
return(0);
}
if (bread(&vision_bf, &vh, sizeof(vh)) <
sizeof(vh))
{
vitrunc();
return(0);
}
linebytes = VWID;
switch (vh.imgdata.pixsiz)
{
case 16:
bap = 2;
break;
case 24:
bap = 3;
break;
case 32:
bap = 4;
break;
default:
continu_box(not_vision_lines);
return(0);
}
linebytes *= bap;
switch (vh.imgtype)
{
case 2: /* uncompressed */
is_compressed = 0;
break;
case 10:
is_compressed = 1;
break;
default:
continu_line(vision_103 /* "Unknown compression type" */);
return(0);
}
if ((vh.imgdata.imgdesc & INLEAVE) != 0)
{
continu_line(vision_104 /* "Sorry, can't deal with Interleave" */);
return(0);
}
if ((buf = lbegmem(linebytes + 130*bap)) == NULL)
return(0);
over = buf + linebytes; /* extra at end to make decompression easier */
for (i=0; i<3; i++)
{
if ((rgb_bufs[i] = begmem(VWID)) == NULL)
return(0);
}
is_flipped = !((vh.imgdata.imgdesc&SCRORG) == SCRORG);
if ((pic_cel = alloc_cel(VWID, vh.imgdata.height,
vh.imgdata.xorg, vh.imgdata.yorg)) == NULL)
return(0);
vstart = pic_cel->p;
vnext = pic_cel->bpr;
if (is_flipped)
{
vstart = long_to_pt(
pt_to_long(vstart) + vnext * (vh.imgdata.height-1));
vnext = -vnext;
}
data_offset = vh.idlength + sizeof(vh);
if (vh.maptype != 0)
data_offset += ((vh.cms.mapbits+7)/8)*vh.cms.maplen;
return(1);
}