blob: 93a4517a66c4ab1e7529025d7a690ca436519723 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <gif_lib.h>
#include "meh.h"
unsigned char *loadgif(FILE *f, int *bufwidth, int *bufheight){
GifFileType *gif;
SavedImage *img;
GifColorType *colormap;
unsigned char *buf;
if(!(gif = DGifOpenFileHandle(fileno(f)))){
return NULL;
}
if(DGifSlurp(gif) == GIF_ERROR){
return NULL;
}
img = &gif->SavedImages[0];
*bufwidth = img->ImageDesc.Width;
*bufheight = img->ImageDesc.Height;
buf = malloc(img->ImageDesc.Width * img->ImageDesc.Height * 3);
if(img->ImageDesc.ColorMap)
colormap = img->ImageDesc.ColorMap->Colors;
else if(gif->SColorMap)
colormap = gif->SColorMap->Colors;
else
return NULL;
int i, j = 0;
for(i = 0; i < img->ImageDesc.Width * img->ImageDesc.Height; i++){
unsigned char idx = img->RasterBits[i];
buf[j++] = colormap[idx].Red;
buf[j++] = colormap[idx].Green;
buf[j++] = colormap[idx].Blue;
}
return buf;
}
|
