Ogre texture to CEGUI texture

[Lastmerlin]

I want to convert an Ogre::TexturePtr to a CEGUI::Texture.

There are several Code examples around, but I get an error for each one ^^

This is how I create the Ogre Texture:

Code: Select all

Ogre::TexturePtr texture = Ogre::TextureManager::getSingleton().createManual( "minimap_tex",
         Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, Ogre::TEX_TYPE_2D,
   512, 512, 0, Ogre::PF_R8G8B8, Ogre::TU_RENDERTARGET );


Now three attempts for the CEGUI Texture:
1. based on Ogre wiki
http://www.ogre3d.org/wiki/index.php/File_DialogBuild.cpp

Code: Select all

CEGUI::OgreCEGUITexture* ceguiTex = (CEGUI::OgreCEGUITexture*) CEGUI::System::getSingleton().getRenderer()->createTexture();
ceguiTex->setOgreTexture(texture);


2. Based on Ogre tutorial
http://www.ogre3d.org/wiki/index.php/Basic_Tutorial_7

Code: Select all

CEGUI::OgreCEGUITexture* ceguiTex = (CEGUI::OgreCEGUITexture*) CEGUI::System::getSingleton().getRenderer()->createTexture((CEGUI::utf8*)"minimap_tex");


3. Based on some forum thread here

Code: Select all

CEGUI::OgreCEGUITexture* ceguiTex = (CEGUI::OgreCEGUITexture*) CEGUI::System::getSingleton().getRenderer()->createTexture(texture);


The first one gives a linking error

undefined reference to `CEGUI::OgreCEGUITexture::setOgreTexture(Ogre::TexturePtr&)'

while the latter two give the compile time error that I am calling createTexture with wrong arguments. I guess the first attempt is closest to the solution.

Concerning the linker error: I am already using these libs:

pkg-config --libs CEGUI-OGRE
-lCEGUIOgreRenderer -lOgreMain -lCEGUIBase

whats missing ?

Thank you very much

[CrazyEddie]

Hi,

I'm not sure why you get the undefined reference error, it seems strange. This probably means the solution is staring us in the face

In order to use the 'other' approach, you basically require either to cast the renderer returned from CEGUI::System to the CEGUI::OgreCEGUIRenderer (which is only to require the Ogre specific renderer header; it contains a default for the resourceGroup second parameter), or specify the second parameter explicitly yourself as, probably "General".

So:

Code: Select all

CEGUI::OgreCEGUITexture* ceguiTex = (CEGUI::OgreCEGUITexture*)((OgreCEGUIRenderer*)CEGUI::System::getSingleton().getRenderer())->createTexture((CEGUI::utf8*)"minimap_tex");

or

Code: Select all

CEGUI::OgreCEGUITexture* ceguiTex = (CEGUI::OgreCEGUITexture*)CEGUI::System::getSingleton().getRenderer()->createTexture((CEGUI::utf8*)"minimap_tex", "General");

HTH

CE

[Lastmerlin]

Thanks, code is compiling now - although not doing what it is intended to do so far
I hope to get that fixed on my own

[Van]

CEGUI: 0.6.2
Ogre: 1.6.2


Here is how we do it

Code: Select all


   // Create an Ogre Render To Texture process.
   Ogre::TexturePtr mTexturePtr = Ogre::TextureManager::getSingleton().createManual(
      "Hangar/Ship/Display/RTT",
      Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
      Ogre::TEX_TYPE_2D,
      512, 512,
      0,
      Ogre::PF_B8G8R8A8,   // <<< Note we use an ALPHA channel for transparency.
      Ogre::TU_RENDERTARGET );
     
   Ogre::RenderTarget *mRTT = mTexturePtr->getBuffer()->getRenderTarget();


... Some code for Ogre to create cameras and stuff ...

   // Create CEGUI texture from the Ogre RTT
   CEGUI::Texture *mTexture = mGlobalResource->CEGUIRenderer->createTexture( "Hangar/Ship/Display/RTT" );

   // Create CEGUI Imageset
   CEGUI::Imageset *mRTTImageSet = CEGUI::ImagesetManager::getSingleton().createImageset( "Hangar/Ship/Display/ImageSet", mTexture );
   
   // Define a CEGUI Image
   mRTTImageSet->defineImage(
      "Hangar/Ship/Display/Image",
      CEGUI::Point( 0.0f, 0.0f ),
      CEGUI::Size( mTexture->getWidth(), mTexture->getHeight() ),
      CEGUI::Point( 0.0f, 0.0f ) );

   // Set the Image in the StaticImage widow.
   mSIShipImage->setProperty( "Image", "set:Hangar/Ship/Display/ImageSet image:Hangar/Ship/Display/Image" );