Method _setupTarget

Engine/source/postFx/postEffect.cpp:1215–1368

}

void PostEffect::_setupTarget( const SceneRenderState *state, bool *outClearTarget )
{
   if (  mNamedTarget.isRegistered() || 
         mTargetName.compare( "$outTex", 0, String::NoCase ) == 0 )
   {
      // Size it relative to the texture of the first stage or
      // if NULL then use the current target.

      Point2I targetSize;

      // If we have an absolute target size then use that.
      if ( !mTargetSize.isZero() )
         targetSize = mTargetSize;

      // Else generate a relative size using the target scale.
      else if ( mActiveTextures[ 0 ] )
      {
         const Point3I &texSize = mActiveTextures[ 0 ]->getSize();

         targetSize.set(   texSize.x * mTargetScale.x,
                           texSize.y * mTargetScale.y );
      }
      else
      {
         GFXTarget *oldTarget = GFX->getActiveRenderTarget();
         const Point2I &oldTargetSize = oldTarget->getSize();

         targetSize.set(   oldTargetSize.x * mTargetScale.x,
                           oldTargetSize.y * mTargetScale.y );
      }

      // Make sure its at least 1x1.
      targetSize.setMax( Point2I::One );

      if (  mNamedTarget.isRegistered() ||
            !mTargetTex ||
            mTargetTex.getWidthHeight() != targetSize )
      {
         mTargetTex.set( targetSize.x, targetSize.y, mTargetFormat,
            &PostFxTargetProfile, "PostEffect::_setupTarget" );

         if ( mTargetClear == PFXTargetClear_OnCreate )
            *outClearTarget = true;

         if(mTargetViewport == PFXTargetViewport_GFXViewport)
         {
            // We may need to scale the GFX viewport to fit within
            // our target texture size
            GFXTarget *oldTarget = GFX->getActiveRenderTarget();
            const Point2I &oldTargetSize = oldTarget->getSize();
            Point2F scale(targetSize.x / F32(oldTargetSize.x), targetSize.y / F32(oldTargetSize.y));

            const RectI &viewport = GFX->getViewport();

            mNamedTarget.setViewport( RectI( viewport.point.x*scale.x, viewport.point.y*scale.y, viewport.extent.x*scale.x, viewport.extent.y*scale.y ) );
         }
         else if(mTargetViewport == PFXTargetViewport_NamedInTexture0 && mActiveNamedTarget[0] && mActiveNamedTarget[0]->getTexture())
         {