** Summary changed: - upgrade to 13.4: wrong/strange behavior opengel es vertex shader + upgrade to 13.4: wrong/strange behavior opengl es vertex shader
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1176818 Title: upgrade to 13.4: wrong/strange behavior opengl es vertex shader Status in “mesa” package in Ubuntu: New Bug description: Graphics: Intel® 965GM I suspect (I am not a mesa etc. specialist) sth wrong in the mesa lib, because opengl ES isn't working correctly any more. I had a WebGL app running nicely in FireFox and Chromium (Ubuntu 12.10). I upgraded from 12.10(64bits) to 13.4 (64bits). Now it does not work correctly any more in FireFox as well as Chromium. No errors, but serious wrong behavior. It still works correctly on other machines (ubuntu 12.04/FireFox, macBook/FireFox, windows/Chromium). The bug turns up in the following lines of the vertex shader (coming from javascript/WebGL) ----------- uniform mediump vec3 criticalHeights; attribute mediump vec3 vertex; ... if(criticalHeights[2] > vertex.z ) {varAmbientLight = redAmbientLight; varDiffuseLight = redDiffuseLight;}; } ----------- criticalHeights[2] and vertex.z vary between -100 and + a few hundred. the 'if' statement always returns true, even with extreme values like -1000000.0 < vertex.z or criticalHeights[2] > 1000000.0 Please find attached output of glxinfo. Thanks. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1176818/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
