On 7/26/07, Hans Fugal <[EMAIL PROTECTED]> wrote: > > ImageMagick does not think these corrupted (identify(1) should return > nonzero if it encounters a corrupted file), but some of them are > obviously not being interpreted correctly by ImageMagick. Try "display > cirrus.rgba" to see what I mean. Unfortunately this means we can't > just use convert(1) or mogrify(1) to fix the files that are broken.
I have looked at some of them, apparently gimp saves 2 channel gray/alpha images when it feels like it. This can be easily checked via the 'file' command. The SGI image specification (link from the osg loader: http://local.wasp.uwa.edu.au/~pbourke/dataformats/sgirgb/sgiversion.html) does not explicitly list this format, but logically I see nothing wrong with it, since the specification does allow 1 channel gray images. Adding an alpha channel feels natural. Moreover, the osg loader seems to do the right thing: unsigned int pixelFormat = raw->sizeZ == 1 ? GL_LUMINANCE : raw->sizeZ == 2 ? GL_LUMINANCE_ALPHA : raw->sizeZ == 3 ? GL_RGB : raw->sizeZ == 4 ? GL_RGBA : (GLenum)-1; (raw->sizeZ is the number of channels) I have never seen a corrupted sky like in your screenshot and haven't experienced any cloud-related crashes either (as far as I can tell). I don't think the textures are corrupted (I assume they would never work then). Rather, I think the different memory layout (due to the different number of channels) might trigger an unrelated bug in the 2 channel case, or there could be some error in the code path handling such images. In the first case, converting the textures to 4 channels might seemingly fix the bug, but it could still be lurking, waiting for a chance to cause a crash. We should try to pinpoint the exact cause so that it can be fixed. Of course I may be completely wrong... Greets, Csaba ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Flightgear-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-devel
