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Fixed handling of gif disposal method (issue #23)

This commit is contained in:
Bert Münnich 2011-10-17 18:39:33 +02:00
parent 55da6fb8dd
commit 3e2523818b
2 changed files with 9 additions and 3 deletions
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2
Makefile
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@ -1,4 +1,4 @@
VERSION = git-20111016
VERSION = git-20111017
CC = gcc
CFLAGS = -ansi -Wall -pedantic -O2

10
image.c
View File

@ -133,6 +133,7 @@ bool img_load_gif(img_t *img, const fileinfo_t *file) {
Imlib_Image *im;
int i, j, bg, r, g, b;
int x, y, w, h, sw, sh;
int px, py, pw, ph;
int intoffset[] = { 0, 4, 2, 1 };
int intjump[] = { 8, 8, 4, 2 };
int transp = -1;
@ -156,6 +157,7 @@ bool img_load_gif(img_t *img, const fileinfo_t *file) {
bg = gif->SBackGroundColor;
sw = gif->SWidth;
sh = gif->SHeight;
px = py = pw = ph = 0;
do {
if (DGifGetRecordType(gif, &rec) == GIF_ERROR) {
@ -218,10 +220,13 @@ 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_disposal != 2 && prev_frame != NULL)
if (prev_frame != NULL && (prev_disposal != 2 ||
i < py || i >= py + ph || j < px || j >= px + pw))
{
*ptr = prev_frame[i * sw + j];
else
} else {
*ptr = bgpixel;
}
} else {
r = cmap->Colors[rows[i-y][j-x]].Red;
g = cmap->Colors[rows[i-y][j-x]].Green;
@ -252,6 +257,7 @@ bool img_load_gif(img_t *img, const fileinfo_t *file) {
if (disposal != 3)
prev_frame = imlib_image_get_data_for_reading_only();
prev_disposal = disposal;
px = x, py = y, pw = w, ph = h;
if (img->multi.cnt == img->multi.cap) {
img->multi.cap *= 2;