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| author | Robin Watts <robin.watts@artifex.com> | 2012-11-21 14:52:41 +0000 |
|---|---|---|
| committer | Robin Watts <robin.watts@artifex.com> | 2012-11-21 14:55:27 +0000 |
| commit | 17db20e94e9973ed76b033fbe30afc3fed20e5b6 (patch) | |
| tree | bd16cc6ff1661d3b7a2bcfae38b5b7f72114b803 /fitz | |
| parent | 92e95c9f19bfe54077389ecde805dafc960a62c6 (diff) | |
| download | mupdf-17db20e94e9973ed76b033fbe30afc3fed20e5b6.tar.xz | |
Bug 693458: Fix calculation of pointer offset in subsampler.
Thanks to zeniko for pointing this out. Non monochrome subsamples
would have gone wrong in the last line.
Diffstat (limited to 'fitz')
| -rw-r--r-- | fitz/res_pixmap.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fitz/res_pixmap.c b/fitz/res_pixmap.c index 8eb489d1..be0196dd 100644 --- a/fitz/res_pixmap.c +++ b/fitz/res_pixmap.c @@ -898,7 +898,7 @@ fz_subsample_pixmap(fz_context *ctx, fz_pixmap *tile, int factor) int back4 = strayX*n-1; int strayY = h%f; int divY = (strayY ? 65536/(strayY*f) : 0); - int back5 = fwd * strayY - 1; + int back5 = fwd * strayY - n; int divXY = (strayY*strayX ? 65536/(strayX*strayY) : 0); fz_subsample_pixmap_ARM(s, w, h, f, factor, n, fwd, back, back2, fwd2, divX, back4, fwd4, fwd3, @@ -957,7 +957,7 @@ fz_subsample_pixmap(fz_context *ctx, fz_pixmap *tile, int factor) if (y > 0) { int div = y * f; - int back5 = fwd * y - 1; + int back5 = fwd * y - n; for (x = w - f; x >= 0; x -= f) { for (nn = n; nn > 0; nn--) |