home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Club Amiga de Montreal - CAM
/
CAM_CD_1.iso
/
files
/
580b.lha
/
Wasp_v1.23
/
src.LZH
/
src
/
ppm.c
< prev
next >
Wrap
C/C++ Source or Header
|
1991-11-15
|
3KB
|
208 lines
/* wasp - copyright 1991 by Steven Reiz
* see wasp.c for further info,
* ppm.c, 24/7/91, 22/10/91 - 25/10/91
*/
#include "wasp.h"
/* #include "ppm.sh" */
#ifdef __STDC__
read_ppm(void)
#else
read_ppm()
#endif
{
char c;
int y;
long depth;
char typ[3];
cread(typ, 3);
if (typ[0]!='P' || typ[1]<'0' || typ[1]>'9' || typ[2]!='\n') {
lseek(infd, 0L, 0);
return 0;
}
typ[2]='\0';
xsz=getn(' ');
ysz=getn('\n');
depth=getn('\n')+1;
printf("PPM/%s input; %ld x %ld, depth: %ld\n", typ, xsz, ysz, depth);
fflush(stdout);
if (!outfilename)
exit(0);
if (depth!=256) {
printe("depths other than 256 are not supported\n");
exit(1);
}
rgb=Malloc(ysz*sizeof(u_short *));
for (y=0; y<ysz; ++y)
rgb[y]=Malloc(xsz*sizeof(u_short));
switch (typ[1]) {
case '5':
read_grey8();
break;
case '6':
read_rgb24();
break;
default:
printe("types other than P5 or P6 are not supported\n");
exit(1);
break;
}
return 1;
}
#ifdef __STDC__
write_ppm(void)
#else
write_ppm()
#endif
{
printf("PPM/P6 output; %ld x %ld, depth: 256\n", xsz, ysz);
cwrite("P6\n", 3);
putn((int)xsz);
cwrite(" ", 1);
putn((int)ysz);
cwrite("\n255\n", 5);
write_rgb24();
erase_counter("PPM file written, %ld bytes", lseek(outfd, 0L, 1));
}
#ifdef __STDC__
PRIVATE int getn(char terminator)
#else
PRIVATE int getn(terminator)
char terminator;
#endif
{
int n;
char c;
n=0;
while (1) {
cread(&c, 1);
if (c<'0' || c>'9')
break;
n=10*n+c-'0';
}
assert(c==terminator);
return n;
}
#ifdef __STDC__
PRIVATE int putn(int n)
#else
PRIVATE int getn(n)
int n;
#endif
{
int i;
char line[20];
i=19;
do {
line[i--]=n%10+'0';
n/=10;
} while (n>0);
cwrite(line+i+1, 19-i);
}
#ifdef __STDC__
read_rgb24(void)
#else
read_rgb24()
#endif
{
char *buf;
int width, color;
int y, x;
char *bufp;
u_short *p;
width=xsz*3;
buf=Malloc(width);
init_counter(0, (int)ysz, 10, NULL);
for (y=0; y<ysz; ++y) {
counter();
cread(buf, width);
x=xsz-1;
bufp=buf;
p=rgb[y];
do {
color=(*bufp++ & 0xf0)<<4;
color|= *bufp++ & 0xf0;
color|=(*bufp++ >>4) & 0x0f;
*p++ =color;
} while (--x>=0);
}
erase_counter(NULL);
free(buf);
}
#ifdef __STDC__
read_grey8(void)
#else
read_grey8()
#endif
{
char *buf;
int color;
int y, x;
char *bufp;
u_short *p;
buf=Malloc((int)xsz);
init_counter(0, (int)ysz, 10, NULL);
for (y=0; y<ysz; ++y) {
counter();
cread(buf, (int)xsz);
x=xsz-1;
bufp=buf;
p=rgb[y];
do {
color= *bufp++ & 0xf0;
color|=(color<<4)|(color>>4);
*p++ =color;
} while (--x>=0);
}
erase_counter(NULL);
free(buf);
}
#ifdef __STDC__
write_rgb24(void)
#else
write_rgb24()
#endif
{
char *buf;
int width, color;
int y, x;
char *bufp;
u_short *p;
width=xsz*3;
buf=Malloc(width);
init_counter(0, (int)ysz, 10, NULL);
for (y=0; y<ysz; ++y) {
counter();
x=xsz-1;
bufp=buf;
p=rgb[y];
do {
color= *p++;
*bufp++ =(color>>4)&0xf0;
*bufp++ =color&0xf0;
*bufp++ =color<<4;
} while (--x>=0);
cwrite(buf, width);
}
free(buf);
}