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Code Issues Releases Activity

avcodec/gif: fix issues with transparent crop

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Resolves issues with some transparent gifs.
This commit is contained in:
Jacob Graff 2019-05-09 16:45:56 -04:00 committed by Paul B Mahol
parent 68bac50604
commit 0158dd14a3
1 changed files with 6 additions and 6 deletions
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12
libavcodec/gif.c
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@ -136,7 +136,7 @@ static void gif_crop_translucent(AVCodecContext *avctx,
while (*y_start < y_end) {
int is_trans = 1;
for (int i = 0; i < w; i++) {
if (buf[w * *y_start + i] != trans) {
if (buf[linesize * *y_start + i] != trans) {
is_trans = 0;
break;
}
@ -148,10 +148,10 @@ static void gif_crop_translucent(AVCodecContext *avctx,
}
// crop bottom
while (y_end < h) {
while (y_end > *y_start) {
int is_trans = 1;
for (int i = 0; i < w; i++) {
if (buf[w * y_end + i] != trans) {
if (buf[linesize * y_end + i] != trans) {
is_trans = 0;
break;
}
@ -165,7 +165,7 @@ static void gif_crop_translucent(AVCodecContext *avctx,
while (*x_start < x_end) {
int is_trans = 1;
for (int i = *y_start; i < y_end; i++) {
if (buf[w * i + *x_start] != trans) {
if (buf[linesize * i + *x_start] != trans) {
is_trans = 0;
break;
}
@ -176,10 +176,10 @@ static void gif_crop_translucent(AVCodecContext *avctx,
}
// crop right
while (x_end < w) {
while (x_end > *x_start) {
int is_trans = 1;
for (int i = *y_start; i < y_end; i++) {
if (buf[w * i + x_end] != trans) {
if (buf[linesize * i + x_end] != trans) {
is_trans = 0;
break;
}