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| author | Robin Watts <robin.watts@artifex.com> | 2017-10-03 16:50:56 +0100 |
|---|---|---|
| committer | Robin Watts <robin.watts@artifex.com> | 2017-10-03 16:50:56 +0100 |
| commit | 4a7815f3b929a05ec8b5aaac965d62d5d370dcbe (patch) | |
| tree | af216a8c7021aa7edf20f5328cebd42bc8d5abd3 /base/gxblend1.c | |
| parent | 71e8599455a7befc7a14f6cd1353c9231fb93d48 (diff) | |
| download | ghostpdl-4a7815f3b929a05ec8b5aaac965d62d5d370dcbe.tar.gz | |
Fix incorrect group alpha calculation.
In pdf14_compose_group, in the tos_isolated case, for simple
blends, we call art_pdf_composite_group_8 to apply blend_mode
to both process and spots. A side effect of this call is to
update the contents of nos_alpha_g_ptr.
In more complex blends, we split the process and spots into
2 different calls to the same function. The current code
however passes nos_alpha_g_ptr to both however, resulting in
it being updated twice.
Fixed here by making one of them take NULL.
Diffstat (limited to 'base/gxblend1.c')
| -rw-r--r-- | base/gxblend1.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/base/gxblend1.c b/base/gxblend1.c index b720a755a..931d298f1 100644 --- a/base/gxblend1.c +++ b/base/gxblend1.c @@ -549,7 +549,7 @@ pdf14_compose_group(pdf14_buf *tos, pdf14_buf *nos, pdf14_buf *maskbuf, tos_pixel[n_chan - num_spots] = tos_pixel[n_chan]; /* Blend process with blend mode */ - art_pdf_composite_group_8(nos_pixel, nos_alpha_g_ptr, tos_pixel, + art_pdf_composite_group_8(nos_pixel, NULL, tos_pixel, n_chan - num_spots, pix_alpha, blend_mode, pblend_procs, pdev); |