Method transformInputRois

Engine/EffectInstance.cpp:2048–2092

} // EffectInstance::allocateImagePlane

void
EffectInstance::transformInputRois(const EffectInstance* self,
                                   const InputMatrixMapPtr & inputTransforms,
                                   double par,
                                   const RenderScale & scale,
                                   RoIMap* inputsRoi,
                                   std::map<int, EffectInstancePtr>* reroutesMap)
{
    if (!inputTransforms) {
        return;
    }
    //Transform the RoIs by the inverse of the transform matrix (which is in pixel coordinates)
    for (InputMatrixMap::const_iterator it = inputTransforms->begin(); it != inputTransforms->end(); ++it) {
        RectD transformedRenderWindow;
        EffectInstancePtr effectInTransformInput = self->getInput(it->first);
        assert(effectInTransformInput);


        RoIMap::iterator foundRoI = inputsRoi->find(effectInTransformInput);
        if ( foundRoI == inputsRoi->end() ) {
            //There might be no RoI because it was null
            continue;
        }

        // invert it
        Transform::Matrix3x3 invertTransform;
        double det = Transform::matDeterminant(*it->second.cat);
        if (det != 0.) {
            invertTransform = Transform::matInverse(*it->second.cat, det);
        }

        Transform::Matrix3x3 canonicalToPixel = Transform::matCanonicalToPixel(par, scale.x,
                                                                               scale.y, false);
        Transform::Matrix3x3 pixelToCanonical = Transform::matPixelToCanonical(par,  scale.x,
                                                                               scale.y, false);

        invertTransform = Transform::matMul(Transform::matMul(pixelToCanonical, invertTransform), canonicalToPixel);
        Transform::transformRegionFromRoD(foundRoI->second, invertTransform, transformedRenderWindow);

        //Replace the original RoI by the transformed RoI
        inputsRoi->erase(foundRoI);
        inputsRoi->insert( std::make_pair(it->second.newInputEffect->getInput(it->second.newInputNbToFetchFrom), transformedRenderWindow) );
        reroutesMap->insert( std::make_pair(it->first, it->second.newInputEffect) );
    }
}

EffectInstance::RenderRoIRetCode
EffectInstance::renderInputImagesForRoI(const FrameViewRequest* request,