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| author | Sebastian Rasmussen <sebras@gmail.com> | 2016-10-15 14:07:37 +0800 |
|---|---|---|
| committer | Sebastian Rasmussen <sebras@gmail.com> | 2016-10-16 12:51:01 +0800 |
| commit | 179205713a1baa64b3e8415ae2ede17c9b4786d2 (patch) | |
| tree | da1f4265ad439614b98269c4c835af76e5ab78e7 /source | |
| parent | 6b3af91f1d2349f93ceb77f38a82f640e44c95bc (diff) | |
| download | mupdf-179205713a1baa64b3e8415ae2ede17c9b4786d2.tar.xz | |
gif: Constrain frames to image boundaries.
Diffstat (limited to 'source')
| -rw-r--r-- | source/fitz/load-gif.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/source/fitz/load-gif.c b/source/fitz/load-gif.c index 4e71973b..ea1a696a 100644 --- a/source/fitz/load-gif.c +++ b/source/fitz/load-gif.c @@ -216,7 +216,10 @@ gif_read_line(fz_context *ctx, struct info *info, unsigned char *dest, int ct_en unsigned char *mp = &info->mask[index]; unsigned int x, k; - for (x = 0; x < info->image_width; x++, sp++, mp++, dp += 4) + if (info->image_top + y >= info->height) + return; + + for (x = 0; x < info->image_width && info->image_left + x < info->width; x++, sp++, mp++, dp += 4) if (!info->has_transparency || *sp != info->transparent) { *mp = 0x02; |