mirror of
https://github.com/JakubMelka/PDF4QT.git
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JBIG2 file viewer
This commit is contained in:
Jakub Melka
36
JBIG2_Viewer/JBIG2_Viewer.pro
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36
JBIG2_Viewer/JBIG2_Viewer.pro
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QT += core gui
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greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
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CONFIG += c++11
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# The following define makes your compiler emit warnings if you use
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# any Qt feature that has been marked deprecated (the exact warnings
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# depend on your compiler). Please consult the documentation of the
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# deprecated API in order to know how to port your code away from it.
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DEFINES += QT_DEPRECATED_WARNINGS
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# You can also make your code fail to compile if it uses deprecated APIs.
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# In order to do so, uncomment the following line.
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# You can also select to disable deprecated APIs only up to a certain version of Qt.
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#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
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QMAKE_CXXFLAGS += /std:c++latest /utf-8
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INCLUDEPATH += $$PWD/../PDFForQtLib/Sources
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DESTDIR = $$OUT_PWD/..
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LIBS += -L$$OUT_PWD/..
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LIBS += -lPDFForQtLib
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SOURCES += \
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main.cpp \
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mainwindow.cpp
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HEADERS += \
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mainwindow.h
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FORMS += \
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mainwindow.ui
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16
JBIG2_Viewer/main.cpp
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16
JBIG2_Viewer/main.cpp
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#include "mainwindow.h"
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#include <QApplication>
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int main(int argc, char *argv[])
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{
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QApplication a(argc, argv);
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QCoreApplication::setOrganizationName("MelkaJ");
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QCoreApplication::setApplicationName("JBIG2_image_viewer");
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QCoreApplication::setApplicationVersion("1.0");
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MainWindow w;
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w.show();
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return a.exec();
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}
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114
JBIG2_Viewer/mainwindow.cpp
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114
JBIG2_Viewer/mainwindow.cpp
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#include "mainwindow.h"
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#include "ui_mainwindow.h"
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#include "pdfexception.h"
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#include "pdfjbig2decoder.h"
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#include <QFile>
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#include <QFileDialog>
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#include <QImageReader>
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#include <QHBoxLayout>
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#include <QLabel>
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#include <QPixmap>
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#include <QSettings>
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#include <QMessageBox>
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MainWindow::MainWindow(QWidget* parent) :
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QMainWindow(parent),
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ui(new Ui::MainWindow)
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{
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ui->setupUi(this);
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setWindowState(Qt::WindowMaximized);
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QSettings settings(QSettings::IniFormat, QSettings::UserScope, QCoreApplication::organizationName(), QCoreApplication::applicationName());
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m_directory = settings.value("Directory").toString();
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}
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MainWindow::~MainWindow()
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{
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QSettings settings(QSettings::IniFormat, QSettings::UserScope, QCoreApplication::organizationName(), QCoreApplication::applicationName());
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settings.setValue("Directory", m_directory);
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delete ui;
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}
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void MainWindow::reportRenderError(pdf::RenderErrorType type, QString message)
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{
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Q_UNUSED(type);
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QMessageBox::critical(this, tr("Error"), message);
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}
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void MainWindow::on_actionAddImage_triggered()
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{
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QString fileName = QFileDialog::getOpenFileName(this, tr("Open image"), m_directory, QString("Bitmap image (*.bmp)"));
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if (QFile::exists(fileName))
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{
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QImageReader reader(fileName);
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QImage image = reader.read();
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if (!image.isNull())
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{
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QFileInfo file(fileName);
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m_directory = file.filePath();
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addImage(file.fileName(), qMove(image));
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}
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}
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}
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void MainWindow::addImage(QString title, QImage image)
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{
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QGroupBox* groupBox = new QGroupBox(this);
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QHBoxLayout* layout = new QHBoxLayout(groupBox);
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groupBox->setTitle(title);
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QLabel* label = new QLabel(groupBox);
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layout->addWidget(label);
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label->setPixmap(QPixmap::fromImage(image));
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label->setFixedSize(image.size());
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ui->imagesMainLayout->addWidget(groupBox);
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}
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void MainWindow::on_actionClear_triggered()
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{
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for (int i = 0; i < ui->imagesMainLayout->count(); ++i)
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{
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ui->imagesMainLayout->itemAt(i)->widget()->deleteLater();
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}
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}
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void MainWindow::on_actionAdd_JBIG2_image_triggered()
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{
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QString fileName = QFileDialog::getOpenFileName(this, tr("Open image"), m_directory, QString("JBIG2 image (*.jb2)"));
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if (QFile::exists(fileName))
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{
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QFile file(fileName);
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if (file.open(QFile::ReadOnly))
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{
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m_directory = QFileInfo(file).filePath();
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QByteArray data = file.readAll();
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file.close();
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try
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{
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if (data.startsWith( "\x97\x4A\x42\x32\x0D\x0A\x1A\x0A"))
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{
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data = data.mid(13);
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}
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pdf::PDFJBIG2Decoder decoder(data, QByteArray(), this);
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pdf::PDFImageData imageData = decoder.decode(pdf::PDFImageData::MaskingType::None);
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if (imageData.isValid())
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{
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QImage image(imageData.getWidth(), imageData.getHeight(), QImage::Format_Mono);
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const uchar* sourceData = reinterpret_cast<const uchar*>(imageData.getData().constData());
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std::copy(sourceData, sourceData + imageData.getData().size(), image.bits());
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addImage(file.fileName(), qMove(image));
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}
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}
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catch (pdf::PDFException exception)
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{
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QMessageBox::critical(this, tr("Error"), exception.getMessage());
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}
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}
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}
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}
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35
JBIG2_Viewer/mainwindow.h
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35
JBIG2_Viewer/mainwindow.h
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#ifndef MAINWINDOW_H
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#define MAINWINDOW_H
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#include <QMainWindow>
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#include "pdfexception.h"
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QT_BEGIN_NAMESPACE
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namespace Ui { class MainWindow; }
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QT_END_NAMESPACE
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class MainWindow : public QMainWindow, public pdf::PDFRenderErrorReporter
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{
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Q_OBJECT
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public:
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MainWindow(QWidget* parent = nullptr);
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virtual ~MainWindow() override;
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virtual void reportRenderError(pdf::RenderErrorType type, QString message) override;
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private slots:
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void on_actionAddImage_triggered();
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void on_actionClear_triggered();
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void on_actionAdd_JBIG2_image_triggered();
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private:
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void addImage(QString title, QImage image);
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Ui::MainWindow* ui;
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QString m_directory;
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};
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#endif // MAINWINDOW_H
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110
JBIG2_Viewer/mainwindow.ui
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110
JBIG2_Viewer/mainwindow.ui
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<?xml version="1.0" encoding="UTF-8"?>
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<ui version="4.0">
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<class>MainWindow</class>
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<widget class="QMainWindow" name="MainWindow">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>800</width>
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<height>600</height>
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</rect>
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</property>
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<property name="windowTitle">
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<string>JBIG2 Image Viewer</string>
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</property>
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<widget class="QWidget" name="centralwidget">
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<layout class="QHBoxLayout" name="horizontalLayout">
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<item>
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<widget class="QScrollArea" name="scrollArea">
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<property name="widgetResizable">
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<bool>true</bool>
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</property>
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<widget class="QWidget" name="scrollAreaWidgetContents_2">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>780</width>
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<height>537</height>
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</rect>
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</property>
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<layout class="QHBoxLayout" name="horizontalLayout_2">
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<item>
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<widget class="QGroupBox" name="groupBox">
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<property name="title">
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<string>Images</string>
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</property>
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<layout class="QHBoxLayout" name="imagesMainLayout">
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<property name="spacing">
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<number>0</number>
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</property>
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<property name="leftMargin">
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<number>0</number>
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</property>
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<property name="topMargin">
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<number>0</number>
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</property>
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<property name="rightMargin">
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<number>0</number>
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</property>
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<property name="bottomMargin">
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<number>0</number>
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</property>
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</layout>
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</widget>
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</item>
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</layout>
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</widget>
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</widget>
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</item>
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</layout>
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</widget>
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<widget class="QMenuBar" name="menubar">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>800</width>
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<height>21</height>
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</rect>
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</property>
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<widget class="QMenu" name="menuFile">
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<property name="title">
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<string>File</string>
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</property>
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<addaction name="actionAddImage"/>
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<addaction name="actionAdd_JBIG2_image"/>
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<addaction name="actionClear"/>
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</widget>
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<addaction name="menuFile"/>
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</widget>
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<widget class="QStatusBar" name="statusbar"/>
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<action name="actionAddImage">
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<property name="text">
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<string>Add image</string>
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</property>
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<property name="shortcut">
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<string>Ctrl+O</string>
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</property>
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</action>
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<action name="actionClear">
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<property name="text">
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<string>Clear</string>
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</property>
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<property name="shortcut">
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<string>Ctrl+W</string>
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</property>
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</action>
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<action name="actionAdd_JBIG2_image">
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<property name="text">
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<string>Add JBIG2 image</string>
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</property>
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<property name="shortcut">
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<string>Ctrl+J</string>
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</property>
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</action>
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</widget>
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<resources/>
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<connections/>
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</ui>
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