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#include "worker.h"
#include "resourcemanager.h"
#include "kpage.h"
#include "canvas.h"
#include "selection.h"
#include "util.h"
#include "config.h"
#include <list>
#include <iostream>
#if QT_VERSION >= 0x050000
# include <poppler-qt5.h>
#else
# include <poppler-qt4.h>
#endif
using namespace std;
Worker::Worker(ResourceManager *res) :
die(false),
res(res) {
// load config options
CFG *config = CFG::get_instance();
smooth_downscaling = config->get_value("Settings/thumbnail_filter").toBool();
thumbnail_size = config->get_value("Settings/thumbnail_size").toInt();
}
void Worker::run() {
while (1) {
res->requestSemaphore.acquire(1);
if (die) {
break;
}
// get next page to render
res->requestMutex.lock();
int page, width, index;
map<int,Request>::iterator less = res->requests.lower_bound(res->center_page);
map<int,Request>::iterator greater = less--;
map<int,Request>::iterator closest;
if (greater != res->requests.end()) {
if (greater != res->requests.begin()) {
// favour nearby page, go down first
if (greater->first + less->first <= res->center_page * 2) {
closest = greater;
} else {
closest = less;
}
} else {
closest = greater;
}
} else {
closest = less;
}
page = closest->first;
index = closest->second.get_lowest_index();
width = closest->second.width[index];
if (closest->second.remove_index_ok(index)) {
res->requestSemaphore.release(1);
} else {
res->requests.erase(closest);
}
res->requestMutex.unlock();
// check for duplicate requests
KPage &kp = res->k_page[page];
kp.mutex.lock();
bool render_new = true;
if (kp.status[index] == width && kp.rotation[index] == res->rotation) {
if (kp.img[index].isNull()) { // only invert colors
render_new = false;
} else { // nothing to do
kp.mutex.unlock();
continue;
}
}
int rotation = res->rotation;
kp.mutex.unlock();
// open page
#ifdef DEBUG
cerr << " rendering page " << page << " for index " << index << ", center: " << res->center_page << endl;
#endif
Poppler::Page *p = NULL;
if (render_new) {
p = res->doc->page(page);
if (p == NULL) {
cerr << "failed to load page " << page << endl;
continue;
}
// render page
float dpi = 72.0 * width / res->get_page_width(page);
QImage img = p->renderToImage(dpi, dpi, -1, -1, -1, -1,
static_cast<Poppler::Page::Rotation>(rotation));
if (img.isNull()) {
cerr << "failed to render page " << page << endl;
continue;
}
// insert new image
kp.mutex.lock();
if (kp.inverted_colors) {
kp.img[index] = QImage();
kp.img_other[index] = img;
} else {
kp.img[index] = img;
kp.img_other[index] = QImage();
}
kp.status[index] = width;
kp.rotation[index] = rotation;
} else {
// image already exists
kp.mutex.lock();
}
if (kp.inverted_colors) {
// generate inverted image
kp.img[index] = kp.img_other[index];
invert_image(&kp.img[index]);
}
// create thumbnail
if (kp.thumbnail.isNull()) {
Qt::TransformationMode mode = Qt::FastTransformation;
if (smooth_downscaling) {
mode = Qt::SmoothTransformation;
}
// scale
if (kp.inverted_colors) {
kp.thumbnail = kp.img_other[index].scaled(QSize(thumbnail_size, thumbnail_size), Qt::IgnoreAspectRatio, mode);
} else {
kp.thumbnail = kp.img[index].scaled(QSize(thumbnail_size, thumbnail_size), Qt::IgnoreAspectRatio, mode);
}
// rotate
if (kp.rotation[index] != 0) {
QTransform trans;
trans.rotate(-kp.rotation[index] * 90);
kp.thumbnail = kp.thumbnail.transformed(trans);
}
kp.thumbnail_other = kp.thumbnail;
invert_image(&kp.thumbnail_other);
if (kp.inverted_colors) {
kp.thumbnail.swap(kp.thumbnail_other);
}
}
kp.mutex.unlock();
res->garbageMutex.lock();
res->garbage[index].insert(page);
res->garbageMutex.unlock();
emit page_rendered(page);
// collect goto links
res->link_mutex.lock();
if (kp.links == NULL) {
res->link_mutex.unlock();
QList<Poppler::Link *> *links = new QList<Poppler::Link *>;
QList<Poppler::Link *> l = p->links();
links->swap(l);
res->link_mutex.lock();
kp.links = links;
}
if (kp.text == NULL) {
res->link_mutex.unlock();
QList<Poppler::TextBox *> text = p->textList();
// assign boxes to lines
// make single parts from chained boxes
set<Poppler::TextBox *> used;
QList<SelectionPart *> selection_parts;
Q_FOREACH(Poppler::TextBox *box, text) {
if (used.find(box) != used.end()) {
continue;
}
used.insert(box);
SelectionPart *p = new SelectionPart(box);
selection_parts.push_back(p);
Poppler::TextBox *next = box->nextWord();
while (next != NULL) {
used.insert(next);
p->add_word(next);
next = next->nextWord();
}
}
// sort by y coordinate
stable_sort(selection_parts.begin(), selection_parts.end(), selection_less_y);
QRectF line_box;
QList<SelectionLine *> *lines = new QList<SelectionLine *>();
Q_FOREACH(SelectionPart *part, selection_parts) {
QRectF box = part->get_bbox();
// box fits into line_box's line
if (!lines->empty() && box.y() <= line_box.center().y() && box.bottom() > line_box.center().y()) {
float ratio_w = box.width() / line_box.width();
float ratio_h = box.height() / line_box.height();
if (ratio_w < 1.0f) {
ratio_w = 1.0f / ratio_w;
}
if (ratio_h < 1.0f) {
ratio_h = 1.0f / ratio_h;
}
if (ratio_w > 1.3f && ratio_h > 1.3f) {
lines->back()->sort();
lines->push_back(new SelectionLine(part));
line_box = part->get_bbox();
} else {
lines->back()->add_part(part);
}
// it doesn't fit, create new line
} else {
if (!lines->empty()) {
lines->back()->sort();
}
lines->push_back(new SelectionLine(part));
line_box = part->get_bbox();
}
}
if (!lines->empty()) {
lines->back()->sort();
}
res->link_mutex.lock();
kp.text = lines;
}
res->link_mutex.unlock();
delete p;
}
}
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