TSE Simple Full Screen Shader Effect

//---------------------------------------
//  fullscreen shader effects
//---------------------------------------
   ShaderData			* mNightEffectShader;
   ShaderData			* mHeatEffectShader;
   Point2F				offsetConsts[4];
   Point4F				offsets;
   ColorF				mFilterColor;
   GFXTexHandle			mSurface[3];
// TGEA 1.7 MOD - Begin
   GFXTextureTargetRef                     mRenderTarget;
// TGEA 1.7 MOD - End
   GFXTexHandle			mBitmapObject;
   StringTableEntry		mBitmapName;
//---------------------------------------

//GFXVideoMode mode = GFX->getVideoMode();
   //mSurface[0].set( mode.resolution.x, mode.resolution.y, GFXFormatR8G8B8A8, &GFXDefaultRenderTargetProfile, 1 );

void GameTSCtrl::renderWorldEffect(const RectI &updateRect, ShaderData *mEffectShader, U32 objMask, GFXFillMode fMode)
{

   FrameAllocator::setWaterMark(0);
 
// TGEA 1.7 MOD - Begin
   if (mRenderTarget == NULL)
	 mRenderTarget = GFX->allocRenderToTextureTarget();

   Point2I cursize = gClientSceneGraph->getDisplayTargetResolution();
   for (int i =0; i < 3; i++)
   {
      if (mSurface[i].isNull())
	 mSurface[i] = GFX->getTextureManager()->createTexture(cursize.x, cursize.y, GFXFormatR8G8B8X8, &GFXDefaultRenderTargetProfile);
   }
// TGEA 1.7 MOD - End
 
   // rectangle points for calcs later
   Point2I a = updateRect.point;
   Point2I b = updateRect.point + updateRect.extent;
 
   GFX->setZEnable( true ); //glEnable(GL_DEPTH_TEST);
   GFX->setZFunc( GFXCmpLessEqual ); //glDepthFunc(GL_LEQUAL);
 
   // Update the dynamic cubemaps on reflective objects
   SimSet *reflectSet = dynamic_cast<SimSet*>( Sim::findObject( "reflectiveSet" ) );
 
   for( SimSetIterator itr(reflectSet); *itr; ++itr )
   {
      if( *itr )
      {
         SceneObject *obj = (SceneObject*) *itr;
         obj->updateReflection();
      }
   }
 

   // Need to consoldate to one clear call // glClear(GL_DEPTH_BUFFER_BIT);
   GFX->setCullMode( GFXCullNone );//glDisable(GL_CULL_FACE);
 
   //************************************
   //************************************
   //************************************
   GFX->setFillMode(fMode);
 
// TGEA 1.7 MOD - Begin
   GFX->pushActiveRenderTarget();

	// Set a starting texture so we can bind w/o any nulls.
   mRenderTarget->attachTexture(GFXTextureTarget::Color0, mSurface[0]);
 
   GFX->setActiveRenderTarget(mRenderTarget);
// TGEA 1.7 MOD - End
 
   // if it's wireframe we have to clear every frame
   if (fMode == GFXFillWireframe)
   {
        GFX->clear( GFXClearTarget, ColorI(0.5,0.5,0.5,0.5), 1.0f, 0 );
   }
 

   // assign the render mask if one came in
   if (objMask)
   {
        gClientSceneGraph->renderScene(  objMask  );
   } else {
        gClientSceneGraph->renderScene( );
   }
 

    GFX->setFillMode(GFXFillSolid);
 
// TGEA 1.7 MOD - Begin
     mRenderTarget->attachTexture(GFXTextureTarget::Color0, NULL);
     GFX->popActiveRenderTarget();
// TGEA 1.7 MOD - End
 
   //************************************
   //************************************
   //************************************
 
    // set the clip
    GFX->setClipRect(updateRect);
 
    // turn off  z clipping
    GFX->setZEnable( false );
 

   //************************************
   //************************************
   //************************************
 

//after this is all surfaces
//**************************************
 
    // set ortho projection matrix
	// this makes ur view of the effect appears as directly above
    MatrixF proj = GFX->getProjectionMatrix();
    MatrixF newMat(true);
    GFX->setProjectionMatrix( newMat );
    GFX->pushWorldMatrix();
    GFX->setWorldMatrix( newMat );   
    GFX->setVertexShaderConstF( 0, (float*)&newMat, 4 );  // send the matrix to the shader
       


// 
//**********************************
 
	// ortho geometry
    GFXVertexBuffer *vb=NULL;
    PrimBuild::color4f( mFilterColor.red , mFilterColor.green , mFilterColor.blue, mFilterColor.alpha );
    PrimBuild::beginToBuffer( GFXTriangleFan, 4 );
      PrimBuild::texCoord2f( 0.0, 1.0 );
      PrimBuild::vertex3f( -1.0 , -1.0 , 0.0 );
      
      PrimBuild::texCoord2f( 0.0, 0.0 );
      PrimBuild::vertex3f( -1.0 ,  1.0 , 0.0 );
      
      PrimBuild::texCoord2f( 1.0, 0.0 );
      PrimBuild::vertex3f(  1.0 ,  1.0 , 0.0 );
      
      PrimBuild::texCoord2f( 1.0, 1.0 );
      PrimBuild::vertex3f(  1.0 , -1.0 , 0.0 );
    U32 numPrims;
    vb =  PrimBuild::endToBuffer( numPrims );
   

   mEffectShader->shader->process();
 
   GFX->setTexture( 0, mSurface[0] );
 
   GFX->setVertexBuffer( vb );
   GFX->drawPrimitive( GFXTriangleFan, 0, 2 );
 
   GFX->disableShaders();
 

//**********************************************

 
   // render state cleanup
   GFX->setAlphaBlendEnable( false );
   GFX->setCullMode( GFXCullNone );
   GFX->setLightingEnable( false );
   GFX->setZWriteEnable( true );
   GFX->setTextureStageColorOp( 0, GFXTOPDisable );  
   GFX->disableShaders();
 
   GFX->popWorldMatrix();
 
   FrameAllocator::setWaterMark(0);
}