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| author | Simon Bünzli <zeniko@gmail.com> | 2015-01-18 16:37:41 +0100 |
|---|---|---|
| committer | Simon Bünzli <zeniko@gmail.com> | 2015-01-20 20:55:58 +0100 |
| commit | 57fbed681778012810594a3974906ed767b11dbf (patch) | |
| tree | 1f518a5da59819f1857134cf683d3b159c55495c /source/pdf/pdf-op-run.c | |
| parent | 3f7e3314739c91a170677954f160ee978eed76c7 (diff) | |
| download | mupdf-57fbed681778012810594a3974906ed767b11dbf.tar.xz | |
don't omit patterns with huge xstep/ystep values
If a pattern is expected to be rendered exactly once and its relevant
part covers the target area, the xstep and ystep values may be far
larger than the pattern's relevant content. Due to rounding applied in
pdf_show_pattern, such patterns have been omitted so far. This issue is
exposed e.g. by the document linked from
http://forums.fofou.org/sumatrapdf/topic?id=3184639 .
Diffstat (limited to 'source/pdf/pdf-op-run.c')
| -rw-r--r-- | source/pdf/pdf-op-run.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/source/pdf/pdf-op-run.c b/source/pdf/pdf-op-run.c index 22e6a4be..73f89fd3 100644 --- a/source/pdf/pdf-op-run.c +++ b/source/pdf/pdf-op-run.c @@ -671,6 +671,13 @@ pdf_show_pattern(pdf_csi *csi, pdf_run_state *pr, pdf_pattern *pat, pdf_gstate * y0 = floorf(fy0 + 0.001); x1 = ceilf(fx1 - 0.001); y1 = ceilf(fy1 - 0.001); + /* The above adjustments cause problems for sufficiently + * large values for xstep/ystep which may be used if the + * pattern is expected to be rendered exactly once. */ + if (fx1 > fx0 && x1 == x0) + x1 = x0 + 1; + if (fy1 > fy0 && y1 == y0) + y1 = y0 + 1; for (y = y0; y < y1; y++) { |