overlay creation from a callback

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ciberfred
Gnoblar
Posts: 7
Joined: Fri Feb 19, 2021 4:09 pm
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overlay creation from a callback

Post by ciberfred »

Ogre Version: :1.12.10:
Operating System: :Debian 11:
Render System: :OpenGL:

Hello all, maybe someone already get the same problem, but well.
I would like to create textoverlay with the overlay system all by code.
if i put the code to load font, create overlay, panel and textarea juste before show the window all is ok.

If i call overlay's functions calls in a callback (that is launched for each overlay element needed), i get this opengl error:

Code: Select all

terminate called after throwing an instance of 'Ogre::InternalErrorException'
what():  InternalErrorException: Cannot create GL vertex buffer in GLHardwareVertexBuffer::GLHardwareVertexBuffer at ./RenderSystems/GL/src/OgreGLHardwareVertexBuffer.cpp (line 46)

note that all instance are laucnhed when the callback is setup and call but i get this error, it's seems that opengl is not initialized but it's already done as i get a window with some elements in it....

any ideas ?

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rpgplayerrobin
Gnoll
Posts: 620
Joined: Wed Mar 18, 2009 3:03 am
x 355

Re: overlay creation from a callback

Post by rpgplayerrobin »

I think you will have to come with more information.

How does your code look when you create the overlays/panels/textarea?
And what kind of a callback do you mean exactly? From where? And how does the code for that look exactly?

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ciberfred
Gnoblar
Posts: 7
Joined: Fri Feb 19, 2021 4:09 pm
x 2

Re: overlay creation from a callback

Post by ciberfred »

well the callback (actually) is like this :

Code: Select all

Ogre::OverlayContainer*	container[50];
Ogre::TextAreaOverlayElement* displayElement[50];
Ogre::Overlay* pin_overlay;
void CALLBACK VPinmame::OnDisplayAvailable(int index, int displayCount, PinmameDisplayLayout* p_displayLayout) {
Ogre::OverlayManager* overm=Ogre::OverlayManager::getSingletonPtr();
		if(!overm) std::cout<<"ERROR !!!!!"<<std::endl;
		if(overm->hasOverlayElement("GUI")) std::cout<<"OK !!"<<std::endl;
		container[index] = static_cast<Ogre::OverlayContainer*>(overm->createOverlayElement("Panel", "GUI"+std::to_string(index)));
		container[index]->setPosition(0,0+(index*50));
		container[index]->setDimensions(400,100);
		container[index]->setMetricsMode(Ogre::GMM_PIXELS);
		displayElement[index] = static_cast<Ogre::TextAreaOverlayElement*>(overm->createOverlayElement("TextArea", "TextAreaName"+std::to_string(index)));
		displayElement[index]->setMetricsMode(Ogre::GMM_PIXELS);
		displayElement[index]->setDimensions(0,0);
		displayElement[index]->setPosition(0,0+(index*50));
		displayElement[index]->setFontName("DejaVu",Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
		displayElement[index]->setParameter("horz_align", "left");
		displayElement[index]->setParameter("vert_align", "top");
		displayElement[index]->setParameter("char_height", "42");
		displayElement[index]->setColour(Ogre::ColourValue(0.0f,1.0f,0.0f, 0.5f));
		displayElement[index]->setCaption(Ogre::String("Hello World!"+std::to_string(index)));
		container[index]->addChild(displayElement[index]);
		pin_overlay->add2D(container[index]);
		pin_overlay->show();
}

the error come from the show() function.

in the 'main' function i have this :

Code: Select all

 [...]
Ogre::OverlaySystem* ovsys = new Ogre::OverlaySystem();
	this->m_backscn_mgr->addRenderQueueListener(ovsys);

Ogre::FontManager &fontMgr = Ogre::FontManager::getSingleton();
Ogre::ResourcePtr p_font= fontMgr.create("DejaVu", Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME );
p_font->setParameter("type", "truetype");
p_font->setParameter("source", "DejaVuSans.ttf");
p_font->setParameter("size", "26");
p_font->setParameter("resolution", "96");
p_font->load();
if(!p_font->isLoaded())
	std::cout << "ERROR : FONT LOAD ERROR" << std::endl;
std::cout << "FONT LOADED " << p_font->getName() <<std::endl;

Ogre::OverlayManager& overm = Ogre::OverlayManager::getSingleton();
Ogre::Overlay* p_overlay= overm.create("Backglassover");
Ogre::OverlayContainer* p_container = static_cast<Ogre::OverlayContainer*>(overm.createOverlayElement("Panel", "GUI"));
p_container->setPosition(0,0);
p_container->setDimensions(400,100);
p_container->setMetricsMode(Ogre::GMM_PIXELS);
Ogre::TextAreaOverlayElement* p_text = static_cast<Ogre::TextAreaOverlayElement*>(overm.createOverlayElement("TextArea", "TextAreaName"));
p_text->setMetricsMode(Ogre::GMM_PIXELS);
p_text->setDimensions(0, 0);
p_text->setPosition(0,0);
p_text->setFontName(p_font->getName(),Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
p_text->setParameter("horz_align", "left");
p_text->setParameter("vert_align", "top");
p_text->setParameter("char_height", "26");
p_text->setColour(Ogre::ColourValue(0.0f,1.0f,0.0f, 0.5f));
p_text->setCaption(Ogre::String("Hello World!"));
p_container->addChild(p_text);
p_overlay->add2D(p_container);
p_overlay->show();
[...]

In the main function all is ok, window is show with the overlay text and the main function is execute before the callback creation (if i comment the call to show() function in the callback function).

the error as i see is a call to glGenBuffersARB() in ogre part....so for me there is something that in the thread that opengl is not know or setup

valgrind debug tell me this :

Code: Select all

OverlayElementFactory for type Panel registered.
OverlayElementFactory for type BorderPanel registered.
OverlayElementFactory for type TextArea registered.
Registering ResourceManager for type Font
Texture 'DejaVuTexture': Loading 1 faces(PF_BYTE_LA,512x512x1) Internal format is PF_BYTE_LA,512x512x1.
FONT LOADED DejaVu
I/O warning : failed to load external entity "../../src/files/Nudge Test and Calibration.directB2S"
ERROR: can't load ../../src/files/Nudge Test and Calibration.directB2S  associate file
Backglass render 
PINMAME: name=hh, description=Haunted House (rev. 2), manufacturer=Gottlieb, year=1982, flags=0, found=1
PINMAME: ok 
osd_display_loading_rom_message(): loading u2_80.bin   ...
osd_display_loading_rom_message(): loading u3_80.bin   ...
osd_display_loading_rom_message(): loading 669-2.cpu   ...
osd_display_loading_rom_message(): loading 669-s1.snd  ...
osd_display_loading_rom_message(): loading 669-s2.snd  ...
osd_display_loading_rom_message():
osd_create_display: 60.00 fps
OnAudioAvailable(): channels=1, sampleRate=44100.00, framesPerSecond=60.00, samplesPerFrame=735, bufferSize=16384
PULSE init...
OnStateUpdated(): state=1
OnMechAvailable: mechNo=0, type=5, length=240, steps=240, pos=0, speed=0
OnDisplayAvailable(): index=0, displayCount=9, type=3, top=0, left=0, width=0, height=0, depth=0, length=6

OK !!

==35589== Thread 12:
==35589== Conditional jump or move depends on uninitialised value(s)
==35589==    at 0xC978AF3: Ogre::GLHardwareVertexBuffer::GLHardwareVertexBuffer(Ogre::HardwareBufferManagerBase*, unsigned long, unsigned long, int, bool) (in /usr/lib/x86_64-linux-gnu/OGRE/RenderSystem_GL.so.1.12.10)
==35589==    by 0xC9738C8: Ogre::GLHardwareBufferManager::createVertexBuffer(unsigned long, unsigned long, int, bool) (in /usr/lib/x86_64-linux-gnu/OGRE/RenderSystem_GL.so.1.12.10)
==35589==    by 0x490346F: Ogre::PanelOverlayElement::_restoreManualHardwareResources() (in /usr/lib/x86_64-linux-gnu/libOgreOverlay.so.1.12.10)
==35589==    by 0x48F23F9: Ogre::Overlay::show() (in /usr/lib/x86_64-linux-gnu/libOgreOverlay.so.1.12.10)
==35589==    by 0x52C9567: libpinmame_update_display (in /usr/local/lib/libpinmame.so.3.5)
==35589==    by 0x521BDB3: updateDisplay (in /usr/local/lib/libpinmame.so.3.5)
==35589==    by 0x521BE32: video_update_core_gen (in /usr/local/lib/libpinmame.so.3.5)
==35589==    by 0x516354E: force_partial_update (in /usr/local/lib/libpinmame.so.3.5)
==35589==    by 0x5163589: draw_screen (in /usr/local/lib/libpinmame.so.3.5)
==35589==    by 0x51638D4: updatescreen (in /usr/local/lib/libpinmame.so.3.5)
==35589==    by 0x50E7336: cpu_vblankcallback (in /usr/local/lib/libpinmame.so.3.5)
==35589==    by 0x50E6FDD: cpu_firstvblankcallback (in /usr/local/lib/libpinmame.so.3.5)
==35589== 
terminate called after throwing an instance of 'Ogre::InternalErrorException'
  what():  InternalErrorException: Cannot create GL vertex buffer in GLHardwareVertexBuffer::GLHardwareVertexBuffer at ./RenderSystems/GL/src/OgreGLHardwareVertexBuffer.cpp (line 46)

==35589== 
==35589== Process terminating with default action of signal 6 (SIGABRT)
==35589==    at 0x812DCE1: raise (raise.c:51)
==35589==    by 0x8117536: abort (abort.c:79)
==35589==    by 0x7E5F7EB: ??? (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.28)
==35589==    by 0x7E6A965: ??? (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.28)
==35589==    by 0x7E6A9D0: std::terminate() (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.28)
==35589==    by 0x7E6AC64: __cxa_throw (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.28)
==35589==    by 0xC93FAD6: ??? (in /usr/lib/x86_64-linux-gnu/OGRE/RenderSystem_GL.so.1.12.10)
==35589==    by 0xC9738C8: Ogre::GLHardwareBufferManager::createVertexBuffer(unsigned long, unsigned long, int, bool) (in /usr/lib/x86_64-linux-gnu/OGRE/RenderSystem_GL.so.1.12.10)
==35589==    by 0x490346F: Ogre::PanelOverlayElement::_restoreManualHardwareResources() (in /usr/lib/x86_64-linux-gnu/libOgreOverlay.so.1.12.10)
==35589==    by 0x48F23F9: Ogre::Overlay::show() (in /usr/lib/x86_64-linux-gnu/libOgreOverlay.so.1.12.10)
==35589==    by 0x52C9567: libpinmame_update_display (in /usr/local/lib/libpinmame.so.3.5)
==35589==    by 0x521BDB3: updateDisplay (in /usr/local/lib/libpinmame.so.3.5)

so for now i don't know where to look for...

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paroj
OGRE Team Member
OGRE Team Member
Posts: 1995
Joined: Sun Mar 30, 2014 2:51 pm
x 1075
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Re: overlay creation from a callback

Post by paroj »

you must access the overlay system only from the main render thread.

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