Re: [osg-users] osg::notify crash, not thread safe
Hi David, There were various changes to osg::Notify during the 3.1.x dev cycle. Could you try out OSG-3.2 and see how you get on. Robert. On 2 August 2013 22:54, David Fries da...@fries.net wrote: I spent a few days tracking down a crash I was having generally when a terrapage terrain was paging. This is using OSG 3.1, when I finally caught the corruption I found that both the DatabasePager thread and the Draw thread were calling OSG_NOTIFY. I wrote up a test that does little more than start up a bunch of threads and print messages and found it too crashes. I am testing on both Linux x86-64 gcc 4.7.2, and Windows 7 Visual Studio 10 and both crash, though it crashes much quicker on Windows. It will crash pretty quickly with the default (no arguments) on Windows. The following arguments are working for me to crash on Linux on a 12 core (24 with hyperthreading), x86-64 system. ./ThreadedNotify 48 1000 2 2 It has been pointed out that cout/cerr are thread safe, so it should be possible to make osg::notify thread safe as well. In this program it helps when I reduce the notification level, at least with the low number of messages being printed it seems to be unlikely. -- David Fries da...@fries.netPGP pub CB1EE8F0 http://fries.net/~david/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Problem loading RGB values when alpha = 0 on mac osx
HI Paulo, I'll have to defer to OSX experts to help out with this one as I don't have experitise on the Mac, nor a Mac to work with. Hopefully they will chip in. Robert. On 3 August 2013 13:35, Paulo Silva paulo.jn...@gmail.com wrote: Ok, let me make a small update, I was able to get osg-3.2 to load the example image using the code in attach. I can't be precise in what worked, but I guess updating libpng helped. Now it output: 0 0 0 0 0 0 0 1 0 128 128 2 64 128 191 4 64 128 191 8 64 128 191 16 64 128 191 32 64 128 191 64 64 128 191 128 64 128 192 255 Which is still not the desired result, but it is different from the old result 0 0 0 0 0 0 0 1 0 127 127 2 63 127 191 4 63 127 191 8 63 127 191 16 63 127 191 32 63 127 191 64 63 127 191 128 64 128 192 255 Weird, weird. I guess I'll have to separate channels into several images as a workaround - at least for now. tschüss ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [osgPlugins] Probleme with PNG plugin: when there are no_data value(generated by GDAL)
HI Mohammed, I don't know whether PNG can handle what you want from it, whether GDAL is buggy, or whether the OSG's plugin can't handle the niche type of .png file GDAL is generating. You are a programming, have all the OSG source code available to you so if you want to delve deeper that have a go at see what might being going astray. As a general comment, GeoTiff is the standard image format for doing geospatial work, one doesn't normally touch png for geospatial work as it's not at all designed for it. I don't know what you are looking at .png in the convtex of geosptail work. Robert. On 3 August 2013 13:52, Mohammed Djeralfia osgfo...@tevs.eu wrote: Hi I have generated a png image from GDAL with no_data values to set the black color to transparant with this command line: gdal_translate.exe --a_nodata 0 -of PNG -ot byte thumbnail.png thumbnail_no_data.png the image is loaded correctly in any viewer (Windows , photoshop...) BUT when I load it with osgViewer --image thumbnail_no_data.png the image is zoomed and not dispalyed correctly: [Image: http://forum.osgearth.org/file/n7581916/badImage.png ] if I don not specify the no_data in GDAL transformation it will be displayed correctly in the osgViewer: [Image: http://forum.osgearth.org/file/n7581916/goodImage.png ] When I maked a comparison between them with photoshop , I see that both have a GRAY CHANNEL , but for the image with no_data there is another CHANNEL that is a mask(perhaps to specify where there are the no_data???) So I think that the PNG Plugin can not read the mask generated by GDAL. I hope that someone can help me with this. I have post before this probleme on the GENERAL brunch: http://forum.openscenegraph.org/viewtopic.php?t=12492 The attached images Thank you! -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=55752#55752 Attachments: http://forum.openscenegraph.org//files/tempview_512.png http://forum.openscenegraph.org//files/tempview_hide_419.png ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Problem loading RGB values when alpha = 0 on mac osx
Hi Paulo, Am 02.08.2013 um 21:14 schrieb Paulo Silva paulo.jn...@gmail.com: Somewhere in the loading some sort of alpha pre-multiplying is going on. Unfortunately the imageio-plugin load its files with premultiplied alpha, as you discovered already. The image-io-plugin does demultiply the alpha again, but can't restore rgb-values with alpha 0 and there are some rounding differences. Between 3.0 and 3.2 I added an optimization to use apples optimized demultipliying-algorithm instead of the prior home cooked version. If you are in need for exact rgba-values use libpng (just edit the cmake-files) or another image-plugin like rgba. cheers, Stephan ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Problem loading RGB values when alpha = 0 on mac osx
Hi Stephan, thanks for the tip. I'll look into the cmake-files to see if I can select libpng instead. cheers, Paulo ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] deferred shading in osg
Hi Community, has anyone has done some work on this and willing to share hints, snippets ? Thanks a lot! Nick -- trajce nikolov nick ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] deferred shading in osg
Hi Nick, You may want to have a look at the osgeffectcompositor example in the osgRecipes project, which is an initial deferred shading framework for OSG. Also there is the osgPPU project that can do the same work for you, I think. Wang Rui 2013/8/5 Trajce Nikolov NICK trajce.nikolov.n...@gmail.com Hi Community, has anyone has done some work on this and willing to share hints, snippets ? Thanks a lot! Nick -- trajce nikolov nick ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
