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| author | Robin Watts <Robin.Watts@artifex.com> | 2020-02-25 18:19:07 +0000 |
|---|---|---|
| committer | Chris Liddell <chris.liddell@artifex.com> | 2020-02-26 08:18:49 +0000 |
| commit | 635303ca7d8a36b3dabc9afbd9132f4b9a36dce5 (patch) | |
| tree | dcd8dd3febb4b1c95daf3885de046b0609457da7 | |
| parent | a00c75369e082798d82202a2b64d8e4b484d0c11 (diff) | |
| download | ghostpdl-635303ca7d8a36b3dabc9afbd9132f4b9a36dce5.tar.gz | |
Fix psdcmyk16 blending issue.
Use uint32_t rather than int to avoid signedness issues.
Seen in the psdcmyk16 page mode rendering of
tests_private/comparefiles/Bug692766.pdf
(bad colors in 4th rgb circle intersection test).
| -rw-r--r-- | base/gxblend.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/base/gxblend.c b/base/gxblend.c index 334f9717d..aa57f5904 100644 --- a/base/gxblend.c +++ b/base/gxblend.c @@ -2188,7 +2188,7 @@ art_pdf_recomposite_group_16(uint16_t *gs_restrict *dstp, uint16_t *gs_restrict { uint16_t dst_alpha; int i; - int tmp; + uint32_t tmp; int scale; uint16_t *gs_restrict dst = *dstp; @@ -2241,7 +2241,7 @@ art_pdf_recomposite_group_16(uint16_t *gs_restrict *dstp, uint16_t *gs_restrict tmp = (src_alpha_g * tmp + 0x8000)>>16; src[n_chan] = tmp; if (dst_alpha_g != NULL) { - int d = *dst_alpha_g; + uint32_t d = *dst_alpha_g; d += d>>15; tmp = (0x10000 - d) * (0xffff - tmp) + 0x8000; *dst_alpha_g = 0xffff - (tmp >> 16); |