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#include <stdio.h>
#include <unistd.h> /* For unlink function */
#include "gd.h"
/* A short program which converts a .png file into a .gd file, for
your convenience in creating images on the fly from a
basis image that must be loaded quickly. The .gd format
is not intended to be a general-purpose format. */
void CompareImages(char *msg, gdImagePtr im1, gdImagePtr im2);
int main(int argc, char **argv)
{
gdImagePtr im1, im2;
FILE *in;
if (argc != 3) {
fprintf(stderr, "Usage: gdcmpgif filename.gif filename.gif\n");
exit(1);
}
in = fopen(argv[1], "rb");
if (!in) {
fprintf(stderr, "Input file does not exist!\n");
exit(1);
}
im1 = gdImageCreateFromGif(in);
fclose(in);
if (!im1) {
fprintf(stderr, "Input is not in GIF format!\n");
exit(1);
}
in = fopen(argv[2], "rb");
if (!in) {
fprintf(stderr, "Input file 2 does not exist!\n");
exit(1);
}
im2 = gdImageCreateFromGif(in);
fclose(in);
if (!im2) {
fprintf(stderr, "Input 2 is not in GIF format!\n");
exit(1);
}
CompareImages("gdcmpgif", im1, im2);
gdImageDestroy(im1);
gdImageDestroy(im2);
return 0;
}
void CompareImages(char *msg, gdImagePtr im1, gdImagePtr im2)
{
int cmpRes;
cmpRes = gdImageCompare(im1, im2);
if (cmpRes & GD_CMP_IMAGE) {
printf("%%%s: ERROR images differ: BAD\n",msg);
} else if (cmpRes != 0) {
printf("%%%s: WARNING images differ: WARNING - Probably OK\n",msg);
} else {
printf("%%%s: OK\n",msg);
return;
}
if (cmpRes & (GD_CMP_SIZE_X + GD_CMP_SIZE_Y)) {
printf("-%s: INFO image sizes differ\n",msg);
}
if (cmpRes & GD_CMP_NUM_COLORS) {
printf("-%s: INFO number of pallette entries differ %d Vs. %d\n",msg,
im1->colorsTotal, im2->colorsTotal);
}
if (cmpRes & GD_CMP_COLOR) {
printf("-%s: INFO actual colours of pixels differ\n",msg);
}
}
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