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Regard gif disposal method; fix bug #18

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This commit is contained in:
Bert Münnich 2011-10-11 20:28:58 +02:00
parent 71e61b13b2
commit 4864f04455
2 changed files with 8 additions and 6 deletions
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2
Makefile
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@ -1,4 +1,4 @@
VERSION = git-20110929
VERSION = git-20111011
CC = gcc
CFLAGS = -Wall -pedantic -O2

12
image.c
View File

@ -137,6 +137,7 @@ bool img_load_gif(img_t *img, const fileinfo_t *file) {
int intoffset[] = { 0, 4, 2, 1 };
int intjump[] = { 8, 8, 4, 2 };
int transp = -1;
unsigned int disposal = 0, prev_disposal = 0;
unsigned int delay = 0;
bool err = false;
@ -178,8 +179,7 @@ bool img_load_gif(img_t *img, const fileinfo_t *file) {
if (delay)
delay = MAX(delay, MIN_GIF_DELAY);
/* TODO: handle disposal method, section 23.c.iv of
http://www.w3.org/Graphics/GIF/spec-gif89a.txt */
disposal = (unsigned int) ext[1] >> 2 & 0x7;
}
ext = NULL;
DGifGetExtensionNext(gif, &ext);
@ -219,7 +219,7 @@ bool img_load_gif(img_t *img, const fileinfo_t *file) {
if (i < y || i >= y + h || j < x || j >= x + w ||
rows[i-y][j-x] == transp)
{
if (prev_frame != NULL)
if (prev_disposal != 2 && prev_frame != NULL)
*ptr = prev_frame[i * sw + j];
else
*ptr = bgpixel;
@ -246,12 +246,14 @@ bool img_load_gif(img_t *img, const fileinfo_t *file) {
}
imlib_context_set_image(im);
prev_frame = imlib_image_get_data_for_reading_only();
imlib_image_set_format("gif");
if (transp >= 0)
imlib_image_set_has_alpha(1);
if (disposal != 3)
prev_frame = imlib_image_get_data_for_reading_only();
prev_disposal = disposal;
if (img->multi.cnt == img->multi.cap) {
img->multi.cap *= 2;
img->multi.frames = (img_frame_t*)