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| author | Robin Watts <robin.watts@artifex.com> | 2013-02-27 16:21:36 +0000 |
|---|---|---|
| committer | Robin Watts <robin.watts@artifex.com> | 2013-02-27 16:21:36 +0000 |
| commit | 4d7c32754abb96b5cbbea6cd98d5ca386ad2a81e (patch) | |
| tree | 69af71c711d0d9b493ad8f1586001138c986ac7e /draw | |
| parent | 963c5f195d44fd46d79c312f35dc3c4d623a8a16 (diff) | |
| download | mupdf-4d7c32754abb96b5cbbea6cd98d5ca386ad2a81e.tar.xz | |
Bug 693640: Fix interpolated painting of images going out of range
When calculating the texture position for interpolated painting we
apply a voodoo correction. This was causing problems by taking us
out of bounds; simply add some checks to avoid this taking us out
of range.
This causes many differences, all small, or progressions. In particular
it solves several 'white lines' cases where images didn't quite
line up.
Diffstat (limited to 'draw')
| -rw-r--r-- | draw/draw_affine.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/draw/draw_affine.c b/draw/draw_affine.c index 32e890f8..c0fe1fea 100644 --- a/draw/draw_affine.c +++ b/draw/draw_affine.c @@ -673,7 +673,11 @@ fz_paint_image_imp(fz_pixmap *dst, const fz_irect *scissor, fz_pixmap *shape, fz * that we have found. */ if (dolerp) { u -= 32768; + if (u < 0) + u = 0; v -= 32768; + if (v < 0) + v = 0; } dp = dst->samples + (unsigned int)(((y - dst->y) * dst->w + (x - dst->x)) * dst->n); |