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/*
* This is a quickly hacked program to convert an SVPMI (Super VGA Protected
* Mode Interface) data file to an svgalib driver. Feedback is
* very welcome.
*
* Initial version (Mar 94 HH). Doesn't do much yet.
* Assumes textmode is last defined mode.
* End with ctrl-c. Correct resulting files by hand.
* (add "}" to modetable.svpmi)
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
void parse ();
void
main ()
{
parse ();
}
/* Return pointer to line red from stdin, end marked by CR or CR/LF.
* Initial spaces are removed. */
char *
getline ()
{
static char linebuf[128];
int i, length, spaces;
i = 0;
for (;;)
{
int c;
c = fgetc (stdin);
if (feof (stdin))
return NULL;
if (c == 13)
continue; /* Skip. */
if (c == 10)
break;
linebuf[i] = c;
i++;
}
length = i;
linebuf[i] = 0;
/* Remove initial spaces. */
spaces = 0;
i = 0;
while (i < length)
{
if (linebuf[i] != ' ')
break;
i++;
spaces++;
}
return linebuf + spaces;
}
/* Skip lines until left side of line matches string s. */
char *
getthisline (char *s)
{
char buf[128];
int n;
n = strlen (s);
for (;;)
{
char *line;
line = getline ();
if (strncmp (line, s, n) == 0)
return line;
}
}
/* Get the (n + 1)th word delimited by ' ' and ';' in string s. */
char *
getword (char *s, int n)
{
int i;
char *word;
int mode, wcount;
word = s;
mode = 0; /* Whitespace. */
wcount = 0;
i = 0;
for (i = 0; s[i] != 0; i++)
{
if (s[i] == ' ' || s[i] == ';')
if (mode == 0)
continue;
else
{
s[i] = 0;
if (wcount == n)
return word;
wcount++;
mode = 0;
}
else if (mode == 1)
continue;
else
{
word = &s[i];
mode = 1;
}
}
return NULL;
}
/* Write lines to file until left part matches string s. */
void
writetofileuntilthisline (char *s, FILE * f)
{
int n;
n = strlen (s);
for (;;)
{
char *line;
line = getline ();
if (strncmp (line, s, n) == 0)
break;
fprintf (f, "%s\n", line);
}
}
void
writetofileuntilend (FILE * f)
{
for (;;)
{
char *line;
line = getline ();
if (line == NULL)
return;
fprintf (f, "%s\n", line);
}
}
void
parse ()
{
char *line;
char s[128];
char modename[40];
int modenumber;
FILE *f, *g;
printf ("SVPMI to svgalib driver converter.\n\n");
/* Read header. */
getthisline ("[ADAPTER]");
line = getline ();
printf ("Graphics Adapter string: %s\n", line);
/* Read modes. */
modenumber = 0;
g = fopen ("modetable.svpmi", "wb");
f = fopen ("modes.svpmi", "wb");
fprintf (g, "/* svgalib SVPMI mode table. */\n\n");
fprintf (g, "static svpmi_modeentry svpmi_modes[] = {\n");
for (;;)
{
int XResolution; /* SVPMI modeinfo fields. */
int YResolution;
int BitsPerPixel;
int BytesPerScanline;
int WinAGranularity;
int WinASize;
int WinABase;
int ModeAttributes;
getthisline ("[MODEINFO]");
line = getthisline ("ModeAttributes");
ModeAttributes = atoi (getword (line, 2));
line = getthisline ("WinAGranularity");
WinAGranularity = atoi (getword (line, 2));
line = getthisline ("WinASize");
WinASize = atoi (getword (line, 2));
line = getthisline ("WinABase");
WinABase = atoi (getword (line, 2));
#if 0
if (WinABase != 0xa0000)
{
printf ("Window is not at 0xa0000.\n");
exit (-1);
}
#endif
line = getthisline ("BytesPerScanline");
BytesPerScanline = atoi (getword (line, 2));
line = getthisline ("XResolution");
XResolution = atoi (getword (line, 2));
line = getthisline ("YResolution");
YResolution = atoi (getword (line, 2));
line = getthisline ("BitsPerPixel");
BitsPerPixel = atoi (getword (line, 2));
if (ModeAttributes == 0x07)
{
/* Text mode. */
printf ("Textmode found.\n");
getthisline ("[SETMODE]");
fprintf (f, "static void svpmi_setmode_text() {\n");
writetofileuntilend (f);
fprintf (f, "}\n\n\n");
fprintf (g, "}\n");
fclose (f);
fclose (g);
exit (0);
}
printf ("Mode found: %d x %d, %dbpp %d bpl gran A %d\n",
XResolution, YResolution, BitsPerPixel,
BytesPerScanline, WinAGranularity);
sprintf (modename, "%dx%dx%d", XResolution, YResolution,
1 << BitsPerPixel);
getthisline ("[SETMODE]");
fprintf (f, "static void svpmi_setmode_%s() {\n", modename);
writetofileuntilthisline ("[SETCOLOR]", f);
fprintf (f, "}\n\n\n");
getthisline ("[SETWINDOW]");
fprintf (f, "static void svpmi_setwindow_%s( int r0 ) {\n", modename);
writetofileuntilthisline ("[MODE]", f);
fprintf (f, "}\n\n\n");
fprintf (g, "{ %d, %d, %d, %d, %d, svpmi_setmode_%s, svpmi_setwindow_%s },\n",
XResolution, YResolution, BitsPerPixel,
BytesPerScanline, WinAGranularity, modename, modename);
fflush (f);
fflush (g);
modenumber++;
}
fprintf (g, "}\n");
fclose (f);
fclose (g);
}
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