paysages3d/gui_qt/basepreview.cpp

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#include "basepreview.h"
#include <QVector>
#include <QPainter>
#include <QTimer>
#include <QWheelEvent>
#include <QLabel>
#include <QMenu>
#include <assert.h>
#include <math.h>
#include "tools.h"
#include "../lib_paysages/system.h"
/*************** PreviewChunk ***************/
class PreviewChunk
{
public:
PreviewChunk(BasePreview* preview, int xstart, int ystart, int xsize, int ysize)
{
_preview = preview;
_xstart = xstart;
_ystart = ystart;
_xsize = xsize;
_ysize = ysize;
_need_render = true;
_rendering = false;
_alive = true;
_priority = xstart;
}
inline BasePreview* preview()
{
return _preview;
}
inline int priority()
{
return _priority;
}
inline bool isOnFront()
{
return _preview->isVisible() && _preview->window()->isActiveWindow();
}
bool isFrom(BasePreview* preview)
{
return _preview == preview;
}
void interrupt()
{
_alive = false;
}
void update()
{
_priority = _xstart;
_need_render = true;
}
bool render()
{
bool changed = false;
int revision;
if (_rendering)
{
return false;
}
_rendering = true;
_alive = true;
if (_need_render)
{
if (!isOnFront())
{
_priority = -1;
_rendering = false;
return false;
}
_need_render = false;
QImage pixbuf = _preview->startChunkTransaction(_xstart, _ystart, _xsize, _ysize, &revision);
for (int x = 0; x < _xsize; x++)
{
for (int y = 0; y < _ysize; y++)
{
QRgb col = pixbuf.pixel(x, y);
if (!_alive)
{
_need_render = true;
_preview->rollbackChunkTransaction();
_rendering = false;
return true;
}
if (qAlpha(col) < 255)
{
QColor newcol = _preview->getPixelColor(_xstart + x, _ystart + y);
newcol.setAlpha(255);
pixbuf.setPixel(x, y, newcol.rgb());
changed = true;
}
}
}
if (changed)
{
_need_render = not _preview->commitChunkTransaction(&pixbuf, _xstart, _ystart, _xsize, _ysize, revision);
}
else
{
_preview->rollbackChunkTransaction();
}
}
if (not _need_render)
{
_priority = -1;
}
_rendering = false;
return _need_render;
}
private:
BasePreview* _preview;
int _priority;
bool _alive;
bool _need_render;
bool _rendering;
int _xstart;
int _ystart;
int _xsize;
int _ysize;
};
static PreviewDrawingManager* _drawing_manager = NULL;
/*************** PreviewDrawingThread ***************/
PreviewDrawingThread::PreviewDrawingThread() :
QThread()
{
_running = false;
}
void PreviewDrawingThread::askStop()
{
_running = false;
}
void PreviewDrawingThread::run()
{
_running = true;
while (_running)
{
_drawing_manager->performOneThreadJob();
QThread::usleep(5000);
}
}
/*************** PreviewDrawingManager ***************/
PreviewDrawingManager::PreviewDrawingManager()
{
_thread_count = systemGetCoreCount();
}
void PreviewDrawingManager::startThreads()
{
for (int i = 0; i < _thread_count; i++)
{
PreviewDrawingThread* thread = new PreviewDrawingThread();
_threads.append(thread);
thread->start();
}
}
void PreviewDrawingManager::stopThreads()
{
logDebug(QString("[Previews] Stopping all render threads"));
for (int i = 0; i < _threads.size(); i++)
{
_threads.at(i)->askStop();
}
for (int i = 0; i < _chunks.size(); i++)
{
_chunks.at(i)->interrupt();
}
for (int i = 0; i < _threads.size(); i++)
{
_threads.at(i)->wait();
}
}
void PreviewDrawingManager::addChunk(PreviewChunk* chunk)
{
_lock.lock();
_chunks.append(chunk);
_updateQueue.append(chunk);
_lock.unlock();
}
void PreviewDrawingManager::removeChunks(BasePreview* preview)
{
int removed = 0;
for (int i = 0; i < _chunks.size(); i++)
{
PreviewChunk* chunk;
chunk = _chunks.at(i);
if (chunk->isFrom(preview))
{
_lock.lock();
_chunks.remove(i);
_updateQueue.removeAll(chunk);
_lock.unlock();
removed++;
i--;
}
}
logDebug(QString("[Previews] %1 chunks removed, %2 remaining").arg(removed).arg(_chunks.size()));
}
void PreviewDrawingManager::suspendChunks(BasePreview* preview)
{
_lock.lock();
for (int i = 0; i < _updateQueue.size(); i++)
{
PreviewChunk* chunk;
chunk = _updateQueue.at(i);
if (chunk->isFrom(preview))
{
_updateQueue.takeAt(i);
i--;
}
}
for (int i = 0; i < _chunks.size(); i++)
{
_chunks.at(i)->interrupt();
}
_lock.unlock();
}
void PreviewDrawingManager::updateChunks(BasePreview* preview)
{
for (int i = 0; i < _chunks.size(); i++)
{
PreviewChunk* chunk;
chunk = _chunks.at(i);
if (chunk->isFrom(preview))
{
chunk->update();
_lock.lock();
if (!_updateQueue.contains(chunk))
{
_updateQueue.prepend(chunk);
}
_lock.unlock();
}
}
}
void PreviewDrawingManager::updateAllChunks()
{
logDebug(QString("[Previews] Reviving all %1 preview chunks").arg(_chunks.size()));
for (int i = 0; i < _chunks.size(); i++)
{
PreviewChunk* chunk;
chunk = _chunks.at(i);
if (chunk->isOnFront())
{
chunk->update();
_lock.lock();
if (!_updateQueue.contains(chunk))
{
_updateQueue.prepend(chunk);
}
_lock.unlock();
}
}
}
static bool _cmpChunkPriority(const PreviewChunk* chunk1, const PreviewChunk* chunk2)
{
return ((PreviewChunk*)chunk1)->priority() < ((PreviewChunk*)chunk2)->priority();
}
void PreviewDrawingManager::performOneThreadJob()
{
PreviewChunk* chunk;
chunk = NULL;
_lock.lock();
if (!_updateQueue.isEmpty())
{
qSort(_updateQueue.begin(), _updateQueue.end(), _cmpChunkPriority);
chunk = _updateQueue.takeFirst();
}
_lock.unlock();
if (chunk)
{
if (chunk->render())
{
_lock.lock();
if (!_updateQueue.contains(chunk))
{
_updateQueue.append(chunk);
}
_lock.unlock();
}
}
}
int PreviewDrawingManager::chunkCount()
{
return _chunks.size();
}
/*************** BasePreview ***************/
BasePreview::BasePreview(QWidget* parent) :
QWidget(parent)
{
this->_lock_drawing = new QMutex();
this->conf_scroll_xmin = 0.0;
this->conf_scroll_xmax = 0.0;
this->conf_scroll_xinit = 0.0;
this->conf_scroll_ymin = 0.0;
this->conf_scroll_ymax = 0.0;
this->conf_scroll_yinit = 0.0;
this->conf_scale_min = 1.0;
this->conf_scale_max = 1.0;
this->conf_scale_init = 1.0;
this->conf_scale_step = 0.0;
this->conf_scroll_logarithmic = false;
this->scaling = 1.0;
this->scalingbase = 1.0;
this->xoffset = 0.0;
this->yoffset = 0.0;
this->_pixbuf = new QImage(this->size(), QImage::Format_ARGB32);
this->_pixbuf->fill(0x00000000);
_width = width();
_height = height();
_revision = 0;
_transactions_count = 0;
_redraw_requested = false;
_info = new QLabel(this);
_info->setVisible(false);
_info->setStyleSheet("QLabel { background-color: white; color: black; }");
this->alive = true;
QObject::connect(this, SIGNAL(contentChange()), this, SLOT(update()));
this->setMinimumSize(256, 256);
this->setMaximumSize(256, 256);
this->resize(256, 256);
startTimer(50);
}
BasePreview::~BasePreview()
{
alive = false;
_drawing_manager->removeChunks(this);
delete _info;
delete _pixbuf;
delete _lock_drawing;
}
void BasePreview::addOsd(QString name)
{
_osd.append(PreviewOsd::getInstance(name));
setMouseTracking(true);
}
void BasePreview::savePack(PackStream* stream)
{
packWriteDouble(stream, &this->xoffset);
packWriteDouble(stream, &this->yoffset);
packWriteDouble(stream, &this->scalingbase);
// TODO Save choices and toggles
}
void BasePreview::loadPack(PackStream* stream)
{
packReadDouble(stream, &this->xoffset);
packReadDouble(stream, &this->yoffset);
packReadDouble(stream, &this->scalingbase);
// TODO Save choices and toggles
updateScaling();
emit contentChange();
}
void BasePreview::initDrawers()
{
_drawing_manager = new PreviewDrawingManager();
_drawing_manager->startThreads();
}
void BasePreview::stopDrawers()
{
_drawing_manager->stopThreads();
}
void BasePreview::reviveAll()
{
_drawing_manager->updateAllChunks();
}
void BasePreview::updateData()
{
}
QColor BasePreview::getColor(double x, double y)
{
return QColor(0, 0, 0);
}
void BasePreview::configScaling(double min, double max, double step, double init, bool logarithmic)
{
double size = (double) width();
if (size >= 1.0)
{
conf_scale_min = min / size;
conf_scale_max = max / size;
conf_scale_step = step / size;
conf_scale_init = init / size;
conf_scroll_logarithmic = logarithmic;
scalingbase = init / size;
if (conf_scroll_logarithmic && conf_scale_max - conf_scale_min > 0.0000001)
{
scalingbase = pow((scalingbase - conf_scale_min) / (conf_scale_max - conf_scale_min), 0.5) * (conf_scale_max - conf_scale_min) + conf_scale_min;
}
updateScaling();
redraw();
}
}
void BasePreview::configScrolling(double xmin, double xmax, double xinit, double ymin, double ymax, double yinit)
{
conf_scroll_xmin = xmin;
conf_scroll_xmax = xmax;
conf_scroll_xinit = xinit;
conf_scroll_ymin = ymin;
conf_scroll_ymax = ymax;
conf_scroll_yinit = yinit;
xoffset = xinit;
yoffset = yinit;
redraw();
}
void BasePreview::addChoice(const QString& key, const QString& title, const QStringList& choices, int init_value)
{
_ContextChoice choice;
choice.title = title;
choice.items << choices;
choice.current = init_value;
_choices.insert(key, choice);
choiceChangeEvent(key, init_value);
}
void BasePreview::choiceChangeEvent(const QString&, int)
{
}
void BasePreview::addToggle(const QString& key, const QString& text, bool init_value)
{
_ContextToggle toggle;
toggle.title = text;
toggle.value = init_value;
_toggles.insert(key, toggle);
toggleChangeEvent(key, init_value);
}
void BasePreview::toggleChangeEvent(QString, bool)
{
}
void BasePreview::redraw()
{
_drawing_manager->suspendChunks(this);
_redraw_requested = true;
}
QImage BasePreview::startChunkTransaction(int x, int y, int w, int h, int* revision)
{
QImage result;
_lock_drawing->lock();
*revision = _revision;
result = _pixbuf->copy(x, y, w, h);
_transactions_count++;
_lock_drawing->unlock();
return result;
}
bool BasePreview::commitChunkTransaction(QImage* chunk, int x, int y, int w, int h, int revision)
{
bool result;
_lock_drawing->lock();
if (revision == _revision)
{
for (int ix = 0; ix < w; ix++)
{
for (int iy = 0; iy < h; iy++)
{
_pixbuf->setPixel(x + ix, y + iy, chunk->pixel(ix, iy));
}
}
emit contentChange();
result = true;
}
else
{
result = false;
}
_transactions_count--;
_lock_drawing->unlock();
return result;
}
void BasePreview::rollbackChunkTransaction()
{
_lock_drawing->lock();
_transactions_count--;
_lock_drawing->unlock();
}
QColor BasePreview::getPixelColor(int x, int y)
{
return getColor((double) (x - _width / 2) * scaling + xoffset, (double) (y - _height / 2) * scaling + yoffset);
}
void BasePreview::timerEvent(QTimerEvent*)
{
_lock_drawing->lock();
if (_redraw_requested && _transactions_count == 0)
{
updateData();
invalidatePixbuf(128);
_redraw_requested = false;
}
_lock_drawing->unlock();
}
void BasePreview::choiceSelected(QAction* action)
{
switch (action->property("mode").toInt())
{
case 1:
{
QString key = action->property("key").toString();
int value = action->property("value").toInt();
_choices[key].current = value;
choiceChangeEvent(key, value);
break;
}
case 2:
{
QString key = action->property("key").toString();
bool value = action->property("value").toBool();
_toggles[key].value = value;
toggleChangeEvent(key, value);
break;
}
default:
;
}
}
void BasePreview::showEvent(QShowEvent* event)
{
updateChunks();
}
void BasePreview::resizeEvent(QResizeEvent* event)
{
QImage* image;
int added = 0;
this->_lock_drawing->lock();
image = this->_pixbuf;
_width = event->size().width();
_height = event->size().height();
this->_pixbuf = new QImage(this->size(), QImage::Format_ARGB32);
this->_pixbuf->fill(0x00000000);
_drawing_manager->removeChunks(this);
for (int x = 0; x < _width; x += 32)
{
for (int y = 0; y < _height; y += 32)
{
_drawing_manager->addChunk(new PreviewChunk(this, x, y, x + 32 > _width ? _width - x : 32, y + 32 > _height ? _height - y : 32));
added++;
}
}
logDebug(QString("[Previews] %1 chunks added, %2 total").arg(added).arg(_drawing_manager->chunkCount()));
delete image;
this->_lock_drawing->unlock();
}
void BasePreview::paintEvent(QPaintEvent* event)
{
QPainter painter(this);
painter.drawImage(0, 0, *this->_pixbuf);
QImage osd(_pixbuf->size(), _pixbuf->format());
osd.fill(0x00000000);
for (int i = 0; i < _osd.size(); i++)
{
_osd[i]->apply(&osd, xoffset, yoffset, scaling);
}
painter.drawImage(0, 0, osd);
}
void BasePreview::updateScaling()
{
if (conf_scroll_logarithmic && conf_scale_max - conf_scale_min > 0.0000001)
{
scaling = pow((scalingbase - conf_scale_min) / (conf_scale_max - conf_scale_min), 2.0) * (conf_scale_max - conf_scale_min) + conf_scale_min;
}
else
{
scaling = scalingbase;
}
}
void BasePreview::updateChunks()
{
_drawing_manager->updateChunks(this);
_revision++;
}
void BasePreview::invalidatePixbuf(int value)
{
for (int ix = 0; ix < _width; ix++)
{
for (int iy = 0; iy < _height; iy++)
{
QRgb col = _pixbuf->pixel(ix, iy);
if (qAlpha(col) == 255)
{
_pixbuf->setPixel(ix, iy, qRgba(qRed(col), qGreen(col), qBlue(col), value));
}
}
}
updateChunks();
}
void BasePreview::contextMenuEvent(QContextMenuEvent* event)
{
QMenu menu(this);
// TODO Get menu items from OSDs
// Fill with choices
QHashIterator<QString, _ContextChoice> iter1(_choices);
while (iter1.hasNext())
{
if (not menu.isEmpty())
{
menu.addSeparator();
}
iter1.next();
menu.addAction(QString(" %1 ").arg(iter1.value().title))->setDisabled(true);
QStringList list = iter1.value().items;
for (int i = 0; i < list.count(); i++)
{
QAction* action = menu.addAction(list[i]);
action->setProperty("mode", 1);
action->setProperty("key", iter1.key());
action->setProperty("value", i);
if (i == iter1.value().current)
{
action->setIcon(QIcon("images/choice_on.png"));
action->setIconVisibleInMenu(true);
}
}
}
// Fill with toggles
QHashIterator<QString, _ContextToggle> iter2(_toggles);
while (iter2.hasNext())
{
if (not menu.isEmpty() and not iter2.hasPrevious())
{
menu.addSeparator();
}
iter2.next();
QAction* action = menu.addAction(iter2.value().title);
action->setProperty("mode", 2);
action->setProperty("key", iter2.key());
action->setProperty("value", not iter2.value().value);
if (iter2.value().value)
{
action->setIcon(QIcon("images/toggle_on.png"));
action->setIconVisibleInMenu(true);
}
}
if (not menu.isEmpty())
{
connect(&menu, SIGNAL(triggered(QAction*)), this, SLOT(choiceSelected(QAction*)));
menu.exec(event->globalPos());
event->accept();
}
}
void BasePreview::mousePressEvent(QMouseEvent* event)
{
if (event->button() == Qt::LeftButton)
{
mousex = event->x();
mousey = event->y();
}
}
void BasePreview::mouseMoveEvent(QMouseEvent* event)
{
int width, height;
width = this->width();
height = this->height();
if (event->buttons() & Qt::LeftButton)
{
int dx, dy;
int ndx, ndy;
dx = event->x() - mousex;
dy = event->y() - mousey;
ndx = dx;
ndy = dy;
if (xoffset - dx * scaling > conf_scroll_xmax)
{
ndx = (int) floor((conf_scroll_xmax - xoffset) / scaling);
}
if (xoffset - dx * scaling < conf_scroll_xmin)
{
ndx = (int) floor((conf_scroll_xmin - xoffset) / scaling);
}
if (yoffset - dy * scaling > conf_scroll_ymax)
{
ndy = (int) floor((conf_scroll_ymax - yoffset) / scaling);
}
if (yoffset - dy * scaling < conf_scroll_ymin)
{
ndy = (int) floor((conf_scroll_ymin - yoffset) / scaling);
}
if (ndx != 0 || ndy != 0)
{
if (ndx <= -width || ndx >= width || ndy <= -height || ndy >= height)
{
xoffset -= (double) ndx * scaling;
yoffset -= (double) ndy * scaling;
_lock_drawing->lock();
_pixbuf->fill(0x00000000);
updateChunks();
_lock_drawing->unlock();
}
else
{
int xstart, xsize, ystart, ysize;
_lock_drawing->lock();
xoffset -= (double) ndx * scaling;
yoffset -= (double) ndy * scaling;
if (ndx < 0)
{
xstart = -ndx;
xsize = width + ndx;
}
else
{
xstart = 0;
xsize = width - ndx;
}
if (ndy < 0)
{
ystart = -ndy;
ysize = height + ndy;
}
else
{
ystart = 0;
ysize = height - ndy;
}
QImage part = _pixbuf->copy(xstart, ystart, xsize, ysize);
_pixbuf->fill(0x00000000);
QPainter painter(_pixbuf);
painter.drawImage(xstart + ndx, ystart + ndy, part);
updateChunks();
_lock_drawing->unlock();
emit contentChange();
}
}
mousex = event->x();
mousey = event->y();
}
else
{
// Get text info from OSD
bool found = false;
for (int i = 0; i < _osd.size(); i++)
{
double x = xoffset + (event->x() - width / 2) * scaling;
double y = yoffset + (event->y() - height / 2) * scaling;
QString info = _osd[i]->getToolTip(x, y, scaling);
if (not info.isEmpty())
{
_info->setText(info);
_info->setVisible(true);
found = true;
break;
}
}
if (not found)
{
_info->setVisible(false);
}
}
}
void BasePreview::wheelEvent(QWheelEvent* event)
{
double factor;
double old_scaling;
int width, height;
int new_width, new_height;
if (event->modifiers() & Qt::ShiftModifier)
{
factor = 5.0;
}
else if (event->modifiers() & Qt::ControlModifier)
{
factor = 0.2;
}
else
{
factor = 1.0;
}
if (event->orientation() == Qt::Vertical)
{
if (event->delta() > 0 && scalingbase > conf_scale_min)
{
scalingbase -= factor * conf_scale_step;
if (scalingbase < conf_scale_min)
{
scalingbase = conf_scale_min;
}
}
else if (event->delta() < 0 && scalingbase < conf_scale_max)
{
scalingbase += factor * conf_scale_step;
if (scalingbase > conf_scale_max)
{
scalingbase = conf_scale_max;
}
}
else
{
event->ignore();
return;
}
}
else
{
event->ignore();
return;
}
old_scaling = scaling;
updateScaling();
width = _pixbuf->width();
height = _pixbuf->height();
if (scaling < old_scaling)
{
_lock_drawing->lock();
new_width = (int) floor(((double) width) * scaling / old_scaling);
new_height = (int) floor(((double) height) * scaling / old_scaling);
QImage part = _pixbuf->copy((width - new_width) / 2, (height - new_height) / 2, new_width, new_height).scaled(width, height, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
_pixbuf->fill(0x00000000);
QPainter painter(_pixbuf);
painter.drawImage(0, 0, part);
invalidatePixbuf(254);
_lock_drawing->unlock();
emit contentChange();
}
else if (scaling > old_scaling)
{
_lock_drawing->lock();
QImage part = _pixbuf->scaled((int) floor(((double) width) * old_scaling / scaling), (int) floor(((double) height) * old_scaling / scaling), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
_pixbuf->fill(0x00000000);
QPainter painter(_pixbuf);
painter.drawImage((width - part.width()) / 2, (height - part.height()) / 2, part);
invalidatePixbuf(254);
_lock_drawing->unlock();
emit contentChange();
}
event->accept();
}
void BasePreview::leaveEvent(QEvent* event)
{
_info->setVisible(false);
}