diff options
Diffstat (limited to 'pdf')
| -rw-r--r-- | pdf/pdf_interpret.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/pdf/pdf_interpret.c b/pdf/pdf_interpret.c index 0720f782..6d312724 100644 --- a/pdf/pdf_interpret.c +++ b/pdf/pdf_interpret.c @@ -1164,10 +1164,15 @@ pdf_show_pattern(pdf_csi *csi, pdf_pattern *pat, fz_rect area, int what) /* patterns are painted using the ctm in effect at the beginning of the content stream */ /* get bbox of shape in pattern space for stamping */ area = fz_transform_rect(invptm, area); - x0 = floorf(area.x0 / pat->xstep); - y0 = floorf(area.y0 / pat->ystep); - x1 = ceilf(area.x1 / pat->xstep); - y1 = ceilf(area.y1 / pat->ystep); + + /* When calculating the number of tiles required, we adjust by a small + * amount to allow for rounding errors. By choosing this amount to be + * smaller than 1/256, we guarantee we won't cause problems that will + * be visible even under our most extreme antialiasing. */ + x0 = floorf(area.x0 / pat->xstep + 0.001); + y0 = floorf(area.y0 / pat->ystep + 0.001); + x1 = ceilf(area.x1 / pat->xstep - 0.001); + y1 = ceilf(area.y1 / pat->ystep - 0.001); oldtopctm = csi->top_ctm; oldtop = csi->gtop; |