Hi
sorry about not testing this sooner, it took my some time to understand
what's going on.
I've removed the modification I made to keep unassociated alpha, and
updated to OIIO 1.6.10.
My app crashes the same way it was crashing before when loading my test
file, so I guess your patch didn't have any effect on this issue.
It's very weird that you didn't get the crash.
Here's the stack I get:
#0 0x7f2fbfbdcde7 in _ZN11OpenImageIO4v1_612convert_typeIhfEET0_RKT_
(0x1ebde7:0x1ebdb6+0x31) from ./libOpenImageIO.so.1.6
#1 0x7f2fbfc71cad in _ZNK11OpenImageIO4v1_69DataProxyIhfEcvfEv
(0x280cad:0x280c92+0x1b) from ./libOpenImageIO.so.1.6
#2 0x7f2fbfc6765a from ./libOpenImageIO.so.1.6
#3 0x7f2fbfc663e4 in
_ZN11OpenImageIO4v1_67premultEiiiiiiNS0_8TypeDescEPvlllii
(0x2753e4:0x2752a1+0x143) from ./libOpenImageIO.so.1.6
#4 0x7f2fbfff9a47 in
_ZN11OpenImageIO4v1_69TIFFInput14read_scanlinesEiiiiiNS0_8TypeDescEPvll
(0x608a47:0x608920+0x127) from ./libOpenImageIO.so.1.6
I guess the issue is here, in premult_impl:
DataArrayProxy<T,float> val ((T*)pixel);
_*float alpha = val[alpha_channel];*_
for (int c = chbegin; c < chend; ++c) {
alpha_channel is set to 3 in the spec, but the file only has a luminance
and an alpha channel.
My call to OIIO is:
if(file->read_scanlines(y_start, y_end, 0, i, 1, spec.format,
out_data))
'i' being the index of the current channel to read: I'm reading channel
one after the other.
I hope this can help.
On 01/06/2016 08:36 AM, Larry Gritz wrote:
I am unable to reproduce, and suspect it is fixed by this patch:
https://github.com/OpenImageIO/oiio/pull/1278
That should be in both the current master and RB-1.6.
Can you confirm on your end?
-- lg
On Jan 5, 2016, at 4:47 AM, Michel Lerenard <[email protected]> wrote:
Hi,
First, happy new year to all of you. May 2016 be bug free. ;)
Sorry to bother you again with this, but did anyone had some time to have a
look at the file attached ?
On 10/26/2015 09:21 AM, Michel Lerenard wrote:
Sorry, I didn't realize the website converted the file when I uploaded it.
It seems all site are converting the picture to their own format, so here's the
file on a standard hosting site:
http://s000.tinyupload.com/index.php?file_id=42596689254225391199
Hopefully it should work.
On 10/23/2015 07:34 PM, Larry Gritz wrote:
I'm confused, that's a png file, how does it ever hit TIFFInput::read_scanlines?
On Oct 23, 2015, at 9:07 AM, Michel Lerenard <[email protected]> wrote:
Hi,
I've encountered a file that makes OIIO crashes during load. The file has an
unassociated alpha channel, and by default OIIO tries to premult it in
TIFFInput::read_scanlines.
The process crashes.
I can prevent the crash by adding "config.attribute ("oiio:UnassociatedAlpha",
1);" into my config spec before I load the file.
I've upped the file here, if anyone can have a look at it ?
http://s28.postimg.org/df6s8zbn1/zlf_density.png
I'm wondering if I can detect that the process will fail and add the flag at
load ?
I made a test with a smaller file (256*256), and it does no crash, weirdly.
Thanks.
Michel
--
Larry Gritz
[email protected]
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--
Larry Gritz
[email protected]
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