Ogre 1.8 iOS GLES2 multiple viewport problem (FSAA related)

[mannam]

Hello,

I found that Ogre renders nothing (everything disappears) when I add an additional viewport, even the new viewport is identical to the original one.

There's no problem with GLES1.

Any idea?

Thanks,
Man

[Wolfmanfx]

Which version do you use? Which platform/device?

[mannam]

I'm using:
official 1.8 release
XCode 4.4.1 iOS 5
iPhone4 iOS 4.3

[mannam]

Update:
- The problem persists in Ogre 1.8.1.
- Simulator has the same problem.

[masterfalcon]

Could you give any more info? Like sample code or steps to reproduce the issue?

[mannam]

I'll try to reproduce it in examples later.

For my project, it happens when a new viewport is created, even it is identical to the default viewport:

Code: Select all

mRenderWindow->addViewport(mDefaultCamera);

[mannam]

Confirmed it's related to FSAA setting.

To reproduce in Ogre iOS template:

1. Create a template project with GLES2 enabled.

2. In ogre.cfg, use the following setting:

Code: Select all

Render System=OpenGL ES 2.x Rendering Subsystem

[OpenGL ES 2.x Rendering Subsystem]
FSAA=4
Full Screen=Yes
RTT Preferred Mode=Copy
Video Mode=768 x 1024
#Video Mode=320 x 480
#Orientation=Portrait

3. In DemoApp::startDemo() in OgreDempApp.cpp, create a viewport right after initOgre() call:

Code: Select all

OgreFramework::getSingletonPtr()->m_pRenderWnd->addViewport(OgreFramework::getSingletonPtr()->m_pCamera, 1);

[masterfalcon]

Good to know. Would you mind filing a bug so this doesn't get lost in the forums?

[mannam]

Added to bug tracker: http://www.ogre3d.org/mantis/view.php?id=590

Update: Both GLES1 and GLES2 has problem.