between the contexts, using the GraphicsContext::Traits sharedContext
and setting the same contextID.
When one of these shared contexts is closed, GraphicsContext::close
deletes all GLObjects for that contextID, regardless of the fact that
they are shared. This means that all of the other contexts sharing the
objects have to recompile them.
The attached tweak makes GraphicsContext::close a bit less brutal for
shared contexts. I have also changed a misleading diagnostic message.
"
I also fixed the vsync implementation introduced with rev.11357 that was crashing with the Windows Error #170. So I removed your temporary /* */ around the vsync condition..."
* support for NPOT-textures on IOS
* support for FBOs (only renderToTexture for now) on IOS (should work
for other OpenGL ES 1/2 targets, too)
* FileUtils-support for IOS"
Initial email from Tim : "I've implemented using a timestamp, available with ARB_timer_query and OpenGL 3.3, to gather GPU stats. This is nice because it can accurately fix the GPU draw time with respect to the other times on the stats graph, rather than having to estimate the wall time of the end of GPU drawing. This also prevents anomalies like the GPU phase starting before the draw phase..."
Changes to Tim's submission by Robert: Removal of need for swap buffer callback in ViewerBase.cpp, by
integrating a osg::State::frameCompleted() method that does the stats timing collection. Introduction of a
GraphicsContext::swapBuffersCallbackOrImplementation() method that calls the State::frameCompleted() and
the swap buffers callback or the swapImplementation as required.
As Robert pointed out, i opted for modifying the resize code where the break is to minimize code changes, avoiding the duplicate resize of the viewport with the use of a vector and a search for duplicates. Not very elegant (avoiding an effect of a cause), another approach could be ripping out the method osg::Camera::setViewport(osg::Viewport*) which is more inline with Roberts rationale behind not to share viewports between cameras and left only its overloaded method setViewport(x,y,width,height). But this approach need some refactoring due to the intense use of the method. Notice also that the resize works well without this change if no sharing occurs, and the user of the method can opt for always call setViewport with a new instance.
"
Note from Robert Osfield, changed this submission to use an std::set<Viewport*> rather than an std::vector<> as it keeps the code a bit cleaner and more compact.
Moved the handling of DisplaySettings into Traits constructor.
Added support for s/getGLContextVersion(), s/getGLContextFlags() and s/getGLContextProfileMask() to osg::DisplaySettings.
Added command line and env var support for setting the GLContextVersion, GLContextFlags and GLContextProfileMask to osg::DisplaySettings.
local function pointer to avoid compiler warnings related to case void*.
Moved various OSG classes across to using setGLExtensions instead of getGLExtensions,
and changed them to use typedef declarations in the headers rather than casts in
the .cpp.
Updated wrappers
Created a new GraphicsThread subclass from OperationThread which allows the
GraphicsContext specific calls to be moved out of the base OperationThread class.
Updated the rest of the OSG to respect these changes.
Added and cleaned up DeleteHandler calls in osgViewer to help avoid crashes on exit.
Changed DatabasePager across to dynamically checcking osg::getCompileContext(..)
Updated wrappers.
