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/*
* copyright (c) 2004, 2005 Michael Thaler <michael.thaler@physik.tu-muenchen.de>
*
* this program is free software; you can redistribute it and/or modify
* it under the terms of the gnu general public license as published by
* the free software foundation; either version 2 of the license, or
* (at your option) any later version.
*
* this program is distributed in the hope that it will be useful,
* but without any warranty; without even the implied warranty of
* merchantability or fitness for a particular purpose. see the
* gnu general public license for more details.
*
* you should have received a copy of the gnu general public license
* along with this program; if not, write to the free software
* foundation, inc., 675 mass ave, cambridge, ma 02139, usa.
*/
#ifndef KIS_SCALE_VISITOR_H_
#define KIS_SCALE_VISITOR_H_
#include "klocale.h"
#include "kis_progress_subject.h"
#include "kis_progress_display_interface.h"
#include "kis_thread.h"
#include "kis_layer_visitor.h"
#include "kis_types.h"
#include "kis_layer.h"
#include "kis_group_layer.h"
#include "kis_paint_layer.h"
#include "kis_adjustment_layer.h"
#include "kis_transaction.h"
#include "kis_undo_adapter.h"
#include "kis_selection.h"
class KisProgressDisplayInterface;
class KisFilterStrategy;
class KisScaleWorker : public KisThread {
/* Structs for the image rescaling routine */
class Contrib {
public:
TQ_INT32 m_pixel;
double m_weight;
};
class ContribList {
public:
TQ_INT32 n; //number of contributors
Contrib *p; //pointer to list of contributions
};
public:
KisScaleWorker(KisPaintDevice * dev, double sx, double sy,
KisFilterStrategy *filterStrategy)
: KisThread()
, m_dev(dev)
, m_sx(sx)
, m_sy(sy)
, m_filterStrategy(filterStrategy) {};
virtual ~KisScaleWorker() {};
void run();
private:
TQ_INT32 m_pixelSize;
KisPaintDevice * m_dev;
double m_sx, m_sy;
KisFilterStrategy * m_filterStrategy;
/**
* calc_x_contrib()
*
* Calculates the filter weights for a single target column.
* contribX->p must be freed afterwards.
*
* Returns -1 if error, 0 otherwise.
*/
int calcContrib(ContribList *contribX, double cale, double fwidth, int srcwidth, KisFilterStrategy *filterStrategy, TQ_INT32 i);
ContribList * contrib; //array of contribution lists
};
class KisScaleVisitor : public KisLayerVisitor, KisProgressSubject {
public:
KisScaleVisitor(KisImageSP img,
double sx,
double sy,
KisProgressDisplayInterface *progress,
KisFilterStrategy *filterStrategy)
: KisLayerVisitor()
, m_img(img)
, m_sx(sx)
, m_sy(sy)
, m_progress(progress)
, m_filterStrategy(filterStrategy)
{
if ( progress )
progress -> setSubject(this, true, true);
emit notifyProgressStage(i18n("Scaling..."),0);
}
virtual ~KisScaleVisitor()
{
// Wait for all threads to finish
KisThread * t;
int threadcount = m_scalethreads.count();
int i = 0;
for ( t = m_scalethreads.first(); t; t = m_scalethreads.next()) {
//progress info
if (t) t->wait();
emit notifyProgress((100 / threadcount) * i);
++i;
}
emit notifyProgressDone();
// Delete all threads
m_scalethreads.setAutoDelete(true);
m_scalethreads.clear();
}
bool visit(KisPaintLayer *layer)
{
// XXX: If all is well, then the image's undoadapter will have started a macro for us
// This will break in a more multi-threaded environment
if (m_img->undoAdapter() && m_img->undoAdapter()->undo()) {
KisTransaction * cmd = new KisTransaction("", layer->paintDevice());
m_img->undoAdapter()->addCommand(cmd);
}
KisScaleWorker * scaleThread = new KisScaleWorker(layer->paintDevice(),
m_sx, m_sy, m_filterStrategy);
m_scalethreads.append(scaleThread);
scaleThread->start();
//scaleThread->run();
layer->setDirty();
return true;
}
bool visit(KisGroupLayer *layer)
{
//KisScaleVisitor visitor (m_img, m_sx, m_sy, m_progress, m_filterStrategy);
// XXX: Maybe faster to scale the projection and do something clever to avoid
// recompositing everything?
layer->resetProjection();
KisLayerSP child = layer->firstChild();
while (child) {
child->accept(*this);
child = child->nextSibling();
}
return true;
}
bool visit(KisPartLayer */*layer*/)
{
return true;
}
virtual bool visit(KisAdjustmentLayer* layer)
{
KisThread * scaleThread = new KisScaleWorker(layer->selection().data(), m_sx, m_sy, m_filterStrategy);
m_scalethreads.append(scaleThread);
scaleThread->start();
layer->resetCache();
layer->setDirty();
return true;
}
// Implement KisProgressSubject
virtual void cancel()
{
KisThread * t;
for ( t = m_scalethreads.first(); t; t = m_scalethreads.next()) {
t->cancel();
}
}
private:
TQPtrList<KisThread> m_scalethreads;
KisImageSP m_img;
double m_sx;
double m_sy;
KisProgressDisplayInterface * m_progress;
KisFilterStrategy * m_filterStrategy;
};
#endif // KIS_SCALE_VISITOR_H_
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