void
setvideomode(int ax, int bx, int cx, int dx)
{
if (g_disk_flag)
{
enddisk();
}
if (videoflag)
{
endvideo();
videoflag = 0;
}
g_good_mode = true;
switch (g_dot_mode)
{
case 0: // text
clear();
/*
touchwin(curwin);
*/
wrefresh(curwin);
break;
case 11:
startdisk();
dotwrite = writedisk;
dotread = readdisk;
lineread = normalineread;
linewrite = normaline;
break;
case 19: // X window
putprompt();
dotwrite = writevideo;
dotread = readvideo;
lineread = readvideoline;
linewrite = writevideoline;
videoflag = 1;
startvideo();
setforgraphics();
break;
default:
std::printf("Bad mode %d\n", g_dot_mode);
exit(-1);
}
if (g_dot_mode != 0)
{
loaddac();
g_and_color = g_colors - 1;
g_box_count = 0;
}
g_vesa_x_res = g_screen_x_dots;
g_vesa_y_res = g_screen_y_dots;
}
int targa_startdisk(FILE *targafp, int overhead)
{
int i;
if (driver_diskp()) // ditch the original file, make just the targa
{
enddisk(); // close the 'screen'
setnullvideo(); // set readdot and writedot routines to do nothing
}
headerlength = overhead;
fp = targafp;
disktarga = true;
i = common_startdisk(xdots*3, ydots, colors);
high_offset = 100000000L; // targa not necessarily init'd to zeros
return i;
}
int pot_startdisk()
{
int i;
if (driver_diskp()) // ditch the original disk file
{
enddisk();
}
else
{
showtempmsg("clearing 16bit pot work area");
}
headerlength = 0;
disktarga = false;
i = common_startdisk(sxdots, sydots << 1, colors);
cleartempmsg();
if (i == 0)
{
disk16bit = true;
}
return i;
}
int common_startdisk(long newrowsize, long newcolsize, int colors)
{
int freemem;
long memorysize;
unsigned int *fwd_link = nullptr;
long longtmp;
unsigned int cache_size;
BYTE *tempfar = nullptr;
if (g_disk_flag)
{
enddisk();
}
if (driver_diskp()) // otherwise, real screen also in use, don't hit it
{
char buf[128];
helptitle();
driver_set_attr(1, 0, C_DVID_BKGRD, 24*80); // init rest to background
for (int i = 0; i < BOXDEPTH; ++i)
{
driver_set_attr(BOXROW+i, BOXCOL, C_DVID_LO, BOXWIDTH); // init box
}
driver_put_string(BOXROW+2, BOXCOL+4, C_DVID_HI, "'Disk-Video' mode");
sprintf(buf, "Screen resolution: %d x %d", sxdots, sydots);
driver_put_string(BOXROW+4, BOXCOL+4, C_DVID_LO, buf);
if (disktarga)
{
driver_put_string(-1, -1, C_DVID_LO, " 24 bit Targa");
}
else
{
driver_put_string(-1, -1, C_DVID_LO, " Colors: ");
sprintf(buf, "%d", colors);
driver_put_string(-1, -1, C_DVID_LO, buf);
}
sprintf(buf, "Save name: %s", savename);
driver_put_string(BOXROW+8, BOXCOL+4, C_DVID_LO, buf);
driver_put_string(BOXROW+10, BOXCOL+4, C_DVID_LO, "Status:");
dvid_status(0, "clearing the 'screen'");
}
high_offset = -1;
seek_offset = high_offset;
cur_offset = seek_offset;
cur_row = -1;
if (disktarga)
{
pixelshift = 0;
}
else
{
pixelshift = 3;
int i = 2;
while (i < colors)
{
i *= i;
--pixelshift;
}
}
timetodisplay = bf_math != bf_math_type::NONE ? 10 : 1000; // time-to-g_driver-status counter
/* allocate cache: try for the max; leave FREEMEMk free if we can get
that much or more; if we can't get that much leave 1/2 of whatever
there is free; demand a certain minimum or nogo at all */
freemem = FREEMEM;
for (cache_size = CACHEMAX; cache_size >= CACHEMIN; --cache_size)
{
longtmp = ((int)cache_size < freemem) ?
(long)cache_size << 11 : (long)(cache_size+freemem) << 10;
tempfar = static_cast<BYTE *>(malloc(longtmp));
if (tempfar != nullptr)
{
free(tempfar);
break;
}
}
if (debugflag == debug_flags::force_disk_min_cache)
{
cache_size = CACHEMIN;
}
longtmp = (long)cache_size << 10;
cache_start = (cache *)malloc(longtmp);
if (cache_size == 64)
{
--longtmp; // safety for next line
}
cache_lru = cache_start;
cache_end = cache_lru + longtmp/sizeof(*cache_start);
membuf = (BYTE *)malloc((long)BLOCKLEN);
if (cache_start == nullptr || membuf == nullptr)
{
stopmsg(STOPMSG_NONE,
"*** insufficient free memory for cache buffers ***");
return -1;
}
if (driver_diskp())
{
char buf[50];
sprintf(buf, "Cache size: %dK", cache_size);
driver_put_string(BOXROW+6, BOXCOL+4, C_DVID_LO, buf);
}
// preset cache to all invalid entries so we don't need free list logic
for (int i = 0; i < HASHSIZE; ++i)
{
hash_ptr[i] = 0xffff; // 0xffff marks the end of a hash chain
}
longtmp = 100000000L;
for (cache *ptr1 = cache_start; ptr1 < cache_end; ++ptr1)
{
ptr1->dirty = false;
ptr1->lru = false;
longtmp += BLOCKLEN;
fwd_link = &hash_ptr[(((unsigned short)longtmp >> BLOCKSHIFT) & (HASHSIZE-1))];
ptr1->offset = longtmp;
ptr1->hashlink = *fwd_link;
*fwd_link = (int)((char *)ptr1 - (char *)cache_start);
}
memorysize = (long)(newcolsize) * newrowsize + headerlength;
int i = (short)memorysize & (BLOCKLEN-1);
if (i != 0)
{
memorysize += BLOCKLEN - i;
}
memorysize >>= pixelshift;
memorysize >>= BLOCKSHIFT;
g_disk_flag = true;
rowsize = (unsigned int) newrowsize;
colsize = (unsigned int) newcolsize;
if (disktarga)
{
// Retrieve the header information first
BYTE *tmpptr;
tmpptr = membuf;
fseek(fp, 0L, SEEK_SET);
for (int i = 0; i < headerlength; i++)
{
*tmpptr++ = (BYTE)fgetc(fp);
}
fclose(fp);
dv_handle = MemoryAlloc((U16)BLOCKLEN, memorysize, DISK);
}
else
{
dv_handle = MemoryAlloc((U16)BLOCKLEN, memorysize, MEMORY);
}
if (dv_handle == 0)
{
stopmsg(STOPMSG_NONE, "*** insufficient free memory/disk space ***");
g_good_mode = false;
rowsize = 0;
return -1;
}
if (driver_diskp())
{
driver_put_string(BOXROW+2, BOXCOL+23, C_DVID_LO,
(MemoryType(dv_handle) == DISK) ? "Using your Disk Drive" : "Using your memory");
}
membufptr = membuf;
if (disktarga)
{
// Put header information in the file
MoveToMemory(membuf, (U16)headerlength, 1L, 0, dv_handle);
}
else
{
for (long offset = 0; offset < memorysize; offset++)
{
SetMemory(0, (U16)BLOCKLEN, 1L, offset, dv_handle);
if (driver_key_pressed()) // user interrupt
{
// esc to cancel, else continue
if (stopmsg(STOPMSG_CANCEL, "Disk Video initialization interrupted:\n"))
{
enddisk();
g_good_mode = false;
return -2; // -1 == failed, -2 == cancel
}
}
}
}
if (driver_diskp())
{
dvid_status(0, "");
}
return 0;
}
