Window.h

/*
 
MIT License
 
Copyright (c) 2017 FMI Open Development / Markus Peura, first.last@fmi.fi
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
 
*/
/*
Part of Rack development has been done in the BALTRAD projects part-financed
by the European Union (European Regional Development Fund and European
Neighbourhood Partnership Instrument, Baltic Sea Region Programme 2007-2013)
*/
#ifndef DRAIN_WINDOW_H_
#define DRAIN_WINDOW_H_
 
#include "drain/util/Frame.h"
#include "drain/util/Functor.h"
#include "drain/util/FunctorBank.h"
#include "drain/util/Static.h"
#include "ImageView.h"
#include "ImageTray.h"
#include "CoordinateHandler.h"
 
 
namespace drain
{
 
namespace image
{
 
 
class WindowConfig { //: public BeanLike { // {  // TODO:
 
public:
 
    template <class FT=IdentityFunctor>
    inline
    WindowConfig(int width=1, int height=0, const FT & functor = FT()) : frame(width,height ? height : width){
        key = functor.getName();
        functorParameters.importCastableMap(functor.getParameters());
    };
 
    inline
    WindowConfig(const WindowConfig & conf) :
        // BeanLike(conf),
        frame(conf.frame),
        key(conf.key)
        //clonerBase(conf.clonerBase)
    {
        //ftorMapEntry = getFunctorBank().find2<IdentityFunctor>(); //  .getMap().begin();
        functorParameters.importCastableMap(conf.functorParameters); // maybe different from cloned ones!
        //parameters.copyStruct(conf.parameters, conf, *this);
    };
 
 
    // Width and height of the window, in pixels.
    Frame2D<int> frame;
 
    // Return width of the window, in pixels.
    inline
    int getWidth() const {
        return frame.width;
    };
 
    // Return height of the window, in pixels.
    inline
    int getHeight() const {
        return frame.height;
    };
 
    typedef typename FunctorBank::map_t fmap_t;
    typedef typename fmap_t::const_iterator ftor_entry_t;
 
    VariableMap functorParameters;
 
 
 
    inline
    void setFunctor(const std::string & ftorKey){
 
        FunctorBank & functorBank = getFunctorBank();
        const std::string k = functorBank.resolve(ftorKey); // empty ok, idFtor!
 
        const fmap_t & m = functorBank.getMap();
        ftor_entry_t it = m.find(k);
        if (it != m.end()){
            key = it->first;
        }
        else {
            throw std::runtime_error(ftorKey + '[' + k + "]: no such entry, using IdentityFunctor");
        }
    };
 
 
    // Needed?
    inline
    const fmap_t::key_type & getFunctorName() const {
        return key;
    };
 
 
 
    inline
    const VariableMap & getFunctorParams() const{
        return functorParameters;
    };
 
 
protected:
 
    std::string key;
 
 
};
 
std::ostream & operator<<(std::ostream & ostr, const WindowConfig & conf);
 
 
DRAIN_TYPENAME(WindowConfig);
 
 
 
class WindowCoreBase {
 
public:
 
    virtual inline
    ~WindowCoreBase(){};
 
    virtual inline
    void setSrcFrame(const ImageFrame & src){
        ImageTray<const Channel> srcTray; //(src);
        srcTray.setChannels(src);
        setSrcFrames(srcTray);
    }
 
    virtual
    void setSrcFrames(const ImageTray<const Channel> & srcTray) = 0;
 
 
 
    virtual inline
    void setDstFrame(ImageFrame & dst){
        ImageTray<Channel> dstTray; //(dst);
        dstTray.setChannels(dst);
        setDstFrames(dstTray);
    }
 
    virtual
    void setDstFrames(ImageTray<Channel> & dstTray) = 0;
 
 
};
 
 
 
class WindowCore : public WindowCoreBase { // rename BasicWindow
 
public:
 
    ImageView src;
    ImageView dst;
 
    virtual inline
    void setSrcFrames(const ImageTray<const Channel> & srcTray){
 
        Logger mout(getImgLog(), "WindowCore", __FUNCTION__);
 
        if (srcTray.empty()){
            mout.error("src: no channels" );
            return;
        }
 
        if (srcTray.size() > 1){
            mout.warn("src: multiple channels" );
        }
 
        //mout.warn("scale:" , srcTray.get(0).getScaling() );
        //mout.note("scale:" , srcTray.get(0).getChannel(0).getScaling() );
        src.setView(srcTray.get(0));
        //mout.warn("scale:" , src.getScaling() );
 
        if (!srcTray.alpha.empty()){
            setSrcFrameWeight(srcTray.getAlpha(0));
        }
 
    };
 
 
    virtual inline
    void setDstFrames(ImageTray<Channel> & dstTray){
 
        Logger mout(getImgLog(), "WindowCore", __FUNCTION__);
 
        if (dstTray.empty()){
            mout.error("dst: no channels" );
            return;
        }
 
        if (dstTray.size() > 1){
            mout.warn("dst: multiple channels" );
        }
 
        dst.setView(dstTray.get(0));
 
        if (!dstTray.alpha.empty()){
            setDstFrameWeight(dstTray.getAlpha(0));
        }
 
    };
 
    // Optional
    virtual inline
    void setSrcFrameWeight(const ImageFrame & srcW){
        Logger mout(getImgLog(), "WindowCore", __FUNCTION__);
        mout.warn("Not implemented" );
    };
 
    virtual inline
    void setDstFrameWeight(ImageFrame & dstW){
        Logger mout(getImgLog(), "WindowCore", __FUNCTION__);
        mout.warn("Not implemented" );
    };
 
};
 
DRAIN_TYPENAME(WindowCore);
 
class WeightedWindowCore : public WindowCore {
 
public:
 
    WeightedWindowCore(){};
 
    virtual
    ~WeightedWindowCore(){};
 
 
    virtual inline
    void setSrcFrameWeight(const ImageFrame & srcW){
        srcWeight.setView(srcW);
    };
 
    virtual inline
    void setDstFrameWeight(ImageFrame & dstW){
        dstWeight.setView(dstW);
    };
 
    // toOStr() ?
 
// protected:
 
    ImageView srcWeight;
 
    ImageView dstWeight;
 
 
};
 
DRAIN_TYPENAME(WeightedWindowCore);
 
 
class MultiChannelWindowCore : public drain::image::WeightedWindowCore {
 
public:
 
    MultiChannelWindowCore(){};
 
    virtual
    ~MultiChannelWindowCore(){};
 
    ImageTray<const Channel> srcTray;
    ImageTray<Channel> dstTray;
 
    virtual inline
    void setSrcFrame(const Channel & srcChannel){// ALERT! Unintentional Shadow (arg: ImageFrame -> Channel)
        ImageTray<const Channel> srcChannels;
        srcChannels.set(srcChannel);
        setSrcFrames(srcChannels);
    }
 
    virtual inline
    void setDstFrame(Channel & dstChannel){  // ALERT! Unintentional Shadow (arg: ImageFrame -> Channel)
        ImageTray<Channel> dstChannels;
        dstChannels.set(dstChannel);
        setDstFrames(dstChannels);
    }
 
    void setSrcFrames(const ImageTray<const Channel> & srcTray){
 
        drain::Logger mout(getImgLog(), "MultiChannelWindowCore", __FUNCTION__);
 
        mout.debug("setting srcTray" );
 
        //this->srcTray.clear();
        this->srcTray.copy(srcTray);
        if (!srcTray.empty()){
            this->src.setView(srcTray.get());
        }
        else {
            mout.warn("setting empty srcTray" );
        }
 
 
        if (!srcTray.alpha.empty()){
            this->srcWeight.setView(srcTray.alpha.get());
        }
        else {
            mout.debug("no srcTray.alpha" );
        }
 
        mout.debug2(this->srcTray );
 
    };
 
    void setDstFrames(ImageTray<Channel> & dstTray){
 
        drain::Logger mout(getImgLog(), "MultiChannelWindowCore", __FUNCTION__);
 
        mout.debug("setting dstTray" );
 
        //this->dstTray.clear();
        this->dstTray.copy(dstTray);
        if (!dstTray.empty()){
            this->dst.setView(this->dstTray.get());
        }
        else {
            mout.warn("setting empty dstTray" );
        }
 
 
        if (!dstTray.alpha.empty()){
            this->dstWeight.setView(this->dstTray.alpha.get());
        }
        else {
            mout.debug("no srcTray.alpha" );
            // mout.warn("setting empty srcTray" );
        }
 
        mout.debug2(this->dstTray );
 
        /*
        if (dstTray.size() != 2){
            mout.note(dstTray );
            mout.error("dst should have exactly 2 image channels" );
        }
        */
 
    };
 
 
 
};
 
 
 
 
template <class C = WindowConfig, class R = WindowCore>
class Window : public R { // consider : public BeanLike ?
 
public:
 
    typedef C conf_t;
 
    conf_t conf;
 
    UniCloner<UnaryFunctor> unicloner;
 
    // Final function, set upon instantiation
    drain::UnaryFunctor & myFunctor;
 
    Window(size_t width=1, size_t height=0) :
        //conf(width, height),
        unicloner(getFunctorBank()),
        myFunctor(unicloner.getCloned(conf.getFunctorName())), //
        //myFunctor(this->conf.getFunctor()),
        resetAtEdges(false),
        SCALE(true),
        iRange(0,0),
        jRange(0,0)
    {
        setSize(width, height==0 ? width : height);
        myFunctor.setParameters(conf.functorParameters);
        location.setLocation(0, 0);
    };
 
    Window(const C & conf) :
        conf(conf),
        unicloner(getFunctorBank()),
        myFunctor(unicloner.getCloned(conf.getFunctorName())), //
        // myFunctor(this->conf.getFunctor(conf.getFunctorName())), //
        resetAtEdges(false),
        SCALE(true),
        iRange(0,0),
        jRange(0,0)
    {
        setSize(conf.frame.width, conf.frame.height);
        myFunctor.setParameters(conf.functorParameters);
        location.setLocation(0, 0);
    }
 
    Window(const Window & window) :
        conf(window.conf),
        myFunctor(this->conf.getFunctor(window.conf.getFunctorName())),
        resetAtEdges(window.resetAtEdges),
        SCALE(window.SCALE),
        iRange(window.iRange),
        jRange(window.jRange)
    {
        setSize(conf.frame.width, conf.frame.height);
        myFunctor.setParameters(window.conf.functorParameters);
        location.setLocation(0, 0);
    }
    // Future option...
    /*
    Window(const R & core, size_t width=1, size_t height=0) : R(core), resetAtEdges(false){
            setSize(width, height==0 ? width : height);
            location.setLocation(0, 0);
    };
    */
 
    virtual
    ~Window(){
        //  << this->conf.getFunctorCloner().size() <<
        //std::cerr << "Erasing: myFunctor " << std::endl;
    };
 
    //  Not final, because some derived classes like SlidingStripe's need to redefine this
    virtual inline
    void setSize(size_t width, size_t height){
        conf.frame.set(width, height);
    }
 
 
    inline
    size_t getArea(){
        return conf.frame.getArea();
    };
 
    inline
    size_t getSamplingArea(){ return samplingArea;};
 
 
 
 
    virtual
    void run();
 
    virtual
    void toStream(std::ostream & ostr) const;
 
 
protected:
 
 
    virtual inline
    bool isHorizontal() const { return (this->conf.frame.width > this->conf.frame.height); };
 
    Point2D<int> location;
 
    int samplingArea = 0;
 
    bool resetAtEdges = false;  // NEW
 
    bool SCALE = true; // NEW
 
    virtual inline
    void initialize(){
        //setScaling();
        setImageLimits();
        setLoopLimits();
        this->location.setLocation(0,0);
    };
 
    virtual
    void update(){};
 
 
    virtual
    void write() = 0; // {};
 
 
 
 
    virtual inline
    bool reset(){
        return true;
    };
 
 
    /*
    virtual
    void se t S caling() const {
        // SCALE = src.scaling.isScaled() || dst.scaling.isScaled();
    };
    */
 
    // Window limits, not image limits
    mutable Range<int> iRange;
    mutable Range<int> jRange;
 
 
    virtual
    void setImageLimits() const = 0;
 
 
    virtual inline
    void setLoopLimits(int width, int height){
        samplingArea = width * height;
        iRange.min = -(static_cast<int>(width)-1)/2;   // note unsigned risk!
        iRange.max = width/2;
        jRange.min = -(static_cast<int>(height)-1)/2;
        jRange.max = height/2;
    }
 
    inline
    void setLoopLimits(){
        setLoopLimits(conf.frame.width, conf.frame.height);
    }
 
 
    // This is like a global member, useful for update(int) functions.
    mutable CoordinateHandler2D coordinateHandler;
 
    // Debugging utility. Returns true on every (2^bit)'th diagonal location (x==y).
    inline
    bool debugDiag(int bit = 4){
        return (this->location.x == this->location.y) && ((this->location.x&((1<<bit)-1)) == 0);
    };
};
 
 
 
template <class C, class R>
void Window<C,R>::toStream(std::ostream &ostr) const {
    ostr << "Window: " << conf.frame << ' ';
    ostr << '[' << iRange << '|' << jRange << ']';
    //ostr << " in (" << srcWidth << 'x' <<  srcHeight << ") ";
    ostr << '@' << location << ',' << coordinateHandler << ' ';
    ostr << "functor: " << this->myFunctor << '\n';
    /*
    ostr << "src: " << src << " scaling:" << (int)SCALE << '\n';
    ostr << "dst: " << dst << '\n';
    ostr << "srcW:" << srcWeight << '\n';
    ostr << "dstW:" << dstWeight << '\n';
    */
}
 
 
template <class P, class R>
void Window<P,R>::run(){
 
    initialize();
 
    int &i = location.x;
    int &j = location.y;
 
    const Range<int> & horzRange = coordinateHandler.getXRange();
    const Range<int> & vertRange = coordinateHandler.getYRange();
 
 
    if (isHorizontal()){
        for (j = 0; j <= vertRange.max; ++j) {
            for (i = 0; i <= horzRange.max; ++i) {
                update();
                write();
            }
            if (resetAtEdges){
                if (!reset())
                    return; // ?
            }
        }
    }
    else {
        for (i = 0; i <= horzRange.max; ++i) {
            for (j = 0; j <= vertRange.max; ++j) {
                update();
                write();
            }
            if (resetAtEdges){
                if (!reset())
                    return;// ?
            }
        }
    }
 
}
 
 
template <class P, class R>
inline
std::ostream & operator<<(std::ostream &ostr, const drain::image::Window<P,R> &w){
    w.toStream(ostr);
    return ostr;
}
 
 
} // image
 
template <class P, class R>
struct TypeName<image::Window<P,R> > {
 
    static const std::string & str(){
        static const std::string name = std::string("Window<") + drain::TypeName<P>::str() + ',' + drain::TypeName<R>::str() + '>'; // todo: develop
        return name;
    }
 
};
 
} // drain
 
 
 
#endif /* Drain_WINDOWOP_H_*/