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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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v_13_05
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colton
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xwd.c
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C/C++ Source or Header
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1995-02-21
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84 lines
/*
* Listing 6 - xwd.c (loader)
*/
#include <stdio.h>
#include <math.h>
#include <X11/XWDFile.h>
#include "ips_image.h"
void read_ximage();
int
main(argc, argv)
int argc;
char **argv;
{
ips_header header;
ips_image image;
if (argc < 3) {
printf("Usage: %s infile outfile\n", argv[0]);
exit(1);
}
read_ximage(&header, &image, argv[1]);
img_to_ips(&header, &image, argv[2]);
exit(0);
}
void
read_ximage(header, image, filename)
ips_header *header;
ips_image *image;
char *filename;
{
int i, pad, rightpad;
char buf[1024];
FILE *fp;
unsigned char *p;
XWDColor xcmap[256];
XWDFileHeader xheader;
if((fp = fopen(filename, "r")) == NULL) {
perror("read_ximage");
exit(1);
}
fread(&xheader, 1, sizeof(XWDFileHeader), fp);
fread(buf, 1, (xheader.header_size - sizeof(XWDFileHeader)), fp);
fread(xcmap, 1, sizeof(XWDColor) * xheader.ncolors, fp);
p = image->data = (unsigned char *)
malloc(xheader.pixmap_width * xheader.pixmap_height);
rightpad = xheader.bytes_per_line - xheader.pixmap_width;
for (i=0; i<xheader.pixmap_height; i++) {
fread((p + (i * xheader.pixmap_width)), 1,
xheader.pixmap_width, fp);
for (pad=0; pad < rightpad; pad++)
fgetc(fp);
}
header->bpp = 8;
header->cmap_count = xheader.ncolors;
header->width = xheader.pixmap_width;
header->height = xheader.pixmap_height;
for(i=0; i < header->cmap_count; i++) {
image->cmap[i].pixel = i;
image->cmap[i].red = xcmap[i].red >> 8;
image->cmap[i].green = xcmap[i].green >> 8;
image->cmap[i].blue = xcmap[i].blue >> 8;
}
fclose(fp);
}