Linux ip-172-26-7-228 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64
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#include <stdio.h>
#include <stdlib.h>
#include "gd.h"
#include "gdtest.h"
#define WIDTH 150
#define HEIGHT 1
#define DELAY 100
#define PROBE_SIZE 11
int main()
{
FILE *fp;
char *file;
gdImagePtr im0, im1, im2;
int i;
char *buf;
/* generate a GIF animation */
im0 = gdImageCreate(WIDTH, HEIGHT);
if (!im0) return 1;
for (i = 0; i < WIDTH; i++) {
int c = gdImageColorAllocate(im0, i, 0xff, 0xff);
gdImageSetPixel(im0, i, 0, c);
}
file = gdTestTempFile("bug00227.gif");
fp = fopen(file, "wb");
if (!fp) return 1;
gdImageGifAnimBegin(im0, fp, 0, 0);
gdImageGifAnimAdd(im0, fp, 1, 0, 0, DELAY, 1, NULL);
im1 = gdImageCreate(WIDTH, HEIGHT);
if (!im1) return 1;
for (i = 0; i < WIDTH; i++) {
int c = gdImageColorAllocate(im1, i, 0x00, 0xff);
gdImageSetPixel(im1, i, 0, c);
}
gdImageGifAnimAdd(im1, fp, 1, 0, 0, DELAY, 1, im0);
im2 = gdImageCreate(WIDTH, HEIGHT);
if (!im2) return 1;
for (i = 0; i < WIDTH; i++) {
int c = gdImageColorAllocate(im2, i, 0xff, 0x00);
gdImageSetPixel(im2, i, 0, c);
}
gdImageGifAnimAdd(im2, fp, 1, 0, 0, DELAY, 1, im1);
gdImageGifAnimEnd(fp);
fclose(fp);
gdImageDestroy(im0);
gdImageDestroy(im1);
gdImageDestroy(im2);
/* check the Global Color Table flag */
fp = fopen(file, "rb");
if (!fp) return 1;
buf = malloc(PROBE_SIZE);
if (!buf) return 1;
if (PROBE_SIZE != fread(buf, 1, PROBE_SIZE, fp)) return 1;
if (buf[PROBE_SIZE-1] & 0x80) return 1;
free(buf);
fclose(fp);
return 0;
}
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