GRIM: Framebuffer is not complete! status: 36054!

[lmerckx]

For GRIM engine, this error occurs with OpenGL and OpenGLES in fullscreen mode (tested on x64 and Raspberry PI2 and 3).

After some debugging, I came to the conclusion that OpenGLSdlGraphics3dManager::createOrUpdateScreen() is called before the initSize method.
So, variables _engineRequestedWidth and _engineRequestedHeight are still 0; which leads to the creation of a 0x0 frame buffer.
And causes the error and a black screen at startup.

A simple test like this at the beginning of createOrUpdateScreen() works but it is perhaps not the good solution:

if ((_engineRequestedWidth == 0) || (_engineRequestedHeight == 0))
  return;

[joeraz]

I am also experiencing this issue, running on Windows 10. It has happened for me with both daily builds 2.3.0git9310-g3fc7fc285e and 2.3.0git9333-g0582662f64.

[lmerckx]

To help understanding the problem, here is a "stack trace" of the call:

From engine.cpp::initGraphics3d(), a call g_system->setGraphicsMode(...) is done.
Here are the classes and methods called from there:

OSystem_SDL::setGraphicsMode() -> 
    SdlGraphics3dManager::setDefaultFeatureState() -> 
    OpenGLSdlGraphics3dManager::setFeatureState(kFeatureFullscreenMode) -> 
    OpenGLSdlGraphics3dManager::createOrUpdateScreen()

And so, createOrUpdateScreen() is called but initSize() has not been called yet, and _engineRequestedWidth/_engineRequestedHeight are not initialized !

[lmerckx]

Still debugging ...

removing the lines

			if (sdlGraphicsManager)
				sdlGraphics3dManager->setDefaultFeatureState();

in backends/platform/sdl/sdl.cpp, around lines 795, also works.

It seems better because these lines have been added lately to the original ResidualVM code.
Are they really needed ? Because they call createOrUpdateScreen() as side-effect before the end of initialization ...

[aquadran]

fixed with commit bb388295a465ef2443a419bc399ae52e71c39df5