[osg-users] [osgCompute] OpenGL sync object and OSG
Hi forum, To Synchronize the data transfer between the GPU(OpenCL) and CPU i need to use the OpenGL Sync object. If i have to code in OpenGL , the snippet could be laid out as follows: Code: cl_event release_event; cl_int errNum; //OpenGL fence object is created. This creates and inserts a fence sync into //OpenGL command stream GLSync sync = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE,0); //The following command creates an OpenCL event linked to the fence. The OpenCL //event is then used in the event list for clEnqueueAcquireGLObjects(), ensuring that //the acquire call will proceed only after the fence has completed. cl_event gl_event = clCreateEventFromGLsyncKHR(context,sync,NULL); errNum = clEnqueueAcquireGLObjects(commandQueue,1,&cl_tex_mem,0,&gl_event,NULL); //Several other OpenCL commands go on here - mainly kernel execution that will //be handled by the computation node //The following command will return an event object and stored in the release_event. //It can be used to sync upon its completion errNum = clEnqueueReleaseGLObjects(commandQueue,1,&cl_tex_mem,0,NULL,&release_event); //creates the OpenGL sync object linked to the release_event GLsync cl_sync = glCreateSyncFromCLeventARB(context, release_event,0); //a wait is inserted into the OpenGL command stream //that will wait upon the completion of the release_event associated with the clEnqueueReleaseGLObjects(). glWaitSync(cl_sync,0, GL_TIMEOUT_IGNORED); Please Avoid the OpenCL references if it does not make any sense to you. I need some hint on how the gl commands will be distributed in pre and post draw callbacks. Should i create two separate classes that deals with the pre draw callback and post draw callback or just post draw callback will be enough? Best Regards Sajjadul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=55196#55196 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Android osgAndroidExampleGLES2 compiler errors
Dear Jordi Torres, thank you for your suggestion. I downloaded the SVN version of OpenSceneGraph and built it for Android. Now I am able to run the Example without crash. However I get some errors and I can't see any rendered 3d model. This is the log of the app. Code: 07-10 23:02:52.770: W/EGLview(14138): creating OpenGL ES 2.0 context 07-10 23:02:52.790: E/OSGANDROID(14138): Initializing geometry 07-10 23:02:52.790: E/Osg Viewer(14138): Testing 07-10 23:02:52.800: W/Osg Viewer(14138): Warning: detected OpenGL error 'invalid enumerant' at Before Renderer::compile 07-10 23:02:52.830: E/OSGANDROID(14138): Initializing geometry 07-10 23:02:52.830: E/Osg Viewer(14138): Testing 07-10 23:02:52.840: W/Osg Viewer(14138): Warning: detected OpenGL error 'invalid enumerant' at Before Renderer::compile 07-10 23:08:08.958: W/SurfaceView(14138): CHECK surface infomation creating=false formatChanged=false sizeChanged=false visible=false visibleChanged=true surfaceChanged=true realSizeChanged=false redrawNeeded=false left=false top=false 07-10 23:08:09.278: W/IInputConnectionWrapper(14138): showStatusIcon on inactive InputConnection 07-10 23:08:53.751: D/libEGL(15910): loaded /system/lib/egl/libEGL_mali.so 07-10 23:08:53.761: D/libEGL(15910): loaded /system/lib/egl/libGLESv1_CM_mali.so 07-10 23:08:53.761: D/libEGL(15910): loaded /system/lib/egl/libGLESv2_mali.so 07-10 23:08:53.771: W/EGLview(15910): creating OpenGL ES 2.0 context 07-10 23:08:53.781: D/dalvikvm(15910): Trying to load lib /data/data/osg.AndroidExample/lib/libosgNativeLib.so 0x41a44740 07-10 23:08:53.901: D/dalvikvm(15910): Added shared lib /data/data/osg.AndroidExample/lib/libosgNativeLib.so 0x41a44740 07-10 23:08:53.901: D/dalvikvm(15910): No JNI_OnLoad found in /data/data/osg.AndroidExample/lib/libosgNativeLib.so 0x41a44740, skipping init 07-10 23:08:53.911: E/OSGANDROID(15910): Initializing geometry 07-10 23:08:53.911: E/Osg Viewer(15910): Testing 07-10 23:08:53.921: W/Osg Viewer(15910): Warning: detected OpenGL error 'invalid enumerant' at Before Renderer::compile In attachment you can see a screenshot of the app running on my Galaxy S III mini. As you can see from the screenshot there's nothing rendered on the screen. The buttons seem to work correctly because when I press them a label on the screen appears indicating the status of the button. What is the problem in your opinion? Thank you again, John Jorge Izquierdo Ciges wrote: > Osg in Android is not emulator-friendly... and the EGL libraries seem from > emulator instead of a proper device. > > > 2013/7/8 John Moore < ()> > > > Hi Adun (), > > I have done as you said. There was no libgnustl_static.a in the > > $(OSG_ANDROID_DIR)/obj/local/armeabi-v7a folder, so I copied it from > > ANDROID_NDK folder. Specifically I copied it from > > $ANDROID_NDK/sources/cxx-stl/gnu-libstdc++/4.6/libs/armeabi-v7a folder > > > > > > The build-ndk now seems ok, except some warnings that were treated as > > errors because of the -Werror flag in the LOCAL_CFLAGS. > > These are the warnings: > > > > Code: > > > > jni/osgNativeLib.cpp: In function 'void > > Java_osg_AndroidExample_osgNativeLib_loadObject(JNIEnv*, jobject, jstring)': > > jni/osgNativeLib.cpp:78:70: error: converting 'false' to pointer type for > > argument 2 of 'char const* _JNIEnv::GetStringUTFChars(jstring, jboolean*)' > > [-Werror=conversion-null] > > jni/osgNativeLib.cpp: In function 'void > > Java_osg_AndroidExample_osgNativeLib_loadObject(JNIEnv*, jobject, jstring, > > jstring)': > > jni/osgNativeLib.cpp:87:70: error: converting 'false' to pointer type for > > argument 2 of 'char const* _JNIEnv::GetStringUTFChars(jstring, jboolean*)' > > [-Werror=conversion-null] > > jni/osgNativeLib.cpp:88:64: error: converting 'false' to pointer type for > > argument 2 of 'char const* _JNIEnv::GetStringUTFChars(jstring, jboolean*)' > > [-Werror=conversion-null] > > cc1plus: all warnings being treated as errors > > > > > > > > > > I removed the -Werror flag and I was able to successfully complete > > ndk-build. > > > > However when I run the app on ADT, it crashes with this output: > > > > Code: > > > > 07-08 17:32:14.799: D/(633): HostConnection::get() New Host Connection > > established 0x2a117488, tid 633 > > 07-08 17:32:14.809: D/libEGL(633): loaded > > /system/lib/egl/libEGL_emulation.so > > 07-08 17:32:14.809: D/(633): HostConnection::get() New Host Connection > > established 0x2a117530, tid 647 > > 07-08 17:32:14.829: D/libEGL(633): loaded > > /system/lib/egl/libGLESv1_CM_emulation.so > > 07-08 17:32:14.861: D/libEGL(633): loaded > > /system/lib/egl/libGLESv2_emulation.so > > 07-08 17:32:14.899: W/EGLview(633): creating OpenGL ES 2.0 context > > 07-08 17:32:14.899: W/dalvikvm(633): threadid=11: thread exiting with > > uncaught exception (group=0x40a13300) > > 07-08 17:32:14.909: E/AndroidRuntime(633): FATAL EXCEPTION: GLThread 75 > > 07-08 17:32:14.909: E/AndroidRuntime(633): > > java.lang.Illeg
Re: [osg-users] Crash in LightSpacePerspectiveShadowMap
Hi Wojciech, On Thu, Jul 11, 2013 at 1:04 AM, Wojciech Lewandowski wrote: > Hi Jan, > > This looks like interesting problem to debug ;-P but unfortunately I am > really swamped. At least for month if not more. No problem, I am not using this shadow technique atm, so it is not a blocker for me. > > There is one thing you may try to improve that precision. Especially if you > use geocentric earth model. Try setting up modelling frame. osgshadow > example shows how to do that. If this not helps ... I will not be able to > help otherwise too soon. Sorry. I was using a simple scene with a skybox/dome fixed relative to the eye, a 100x100 plane at the origin and a simple golem and the OSG cow at the origin, nothing like the Earth model. I don't have a CoordinateSystemNode in the scene. However, yes, it could be a precision error, because the crash typically happens when I move the camera away from the object. Probably setting a lower limit on the size of the polyhedron beyond which the shadow isn't going to be rendered would work around the issue. Regards, Jan ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
