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/*
Copyright (C) 2014 Sebastian Herbord. All rights reserved.
This file is part of Mod Organizer.
Mod Organizer 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 3 of the License, or
(at your option) any later version.
Mod Organizer 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 Mod Organizer. If not, see <http://www.gnu.org/licenses/>.
*/
#include "previewgenerator.h"
#include <QFileInfo>
#include <QLabel>
#include <QImageReader>
#include <QTextEdit>
#include <QGLPixelBuffer>
#include <QDesktopWidget>
#include <utility.h>
PreviewGenerator::PreviewGenerator()
{
// set up image reader to be used for all image types qt (the current installation) supports
auto imageReader = std::bind(&PreviewGenerator::genImagePreview, this, std::placeholders::_1);
foreach (const QByteArray &fileType, QImageReader::supportedImageFormats()) {
m_PreviewGenerators[QString(fileType).toLower()] = imageReader;
}
m_PreviewGenerators["txt"]
= std::bind(&PreviewGenerator::genTxtPreview, this, std::placeholders::_1);
m_PreviewGenerators["dds"]
= std::bind(&PreviewGenerator::genDDSPreview, this, std::placeholders::_1);
QDesktopWidget desk;
m_MaxSize = desk.screenGeometry().size() * 0.8;
}
bool PreviewGenerator::previewSupported(const QString &fileExtension) const
{
return m_PreviewGenerators.find(fileExtension.toLower()) != m_PreviewGenerators.end();
}
QWidget *PreviewGenerator::genPreview(const QString &fileName) const
{
auto iter = m_PreviewGenerators.find(QFileInfo(fileName).completeSuffix().toLower());
if (iter != m_PreviewGenerators.end()) {
return iter->second(fileName);
} else {
return nullptr;
}
}
QWidget *PreviewGenerator::genImagePreview(const QString &fileName) const
{
QLabel *label = new QLabel();
label->setPixmap(QPixmap(fileName));
return label;
}
QWidget *PreviewGenerator::genTxtPreview(const QString &fileName) const
{
QTextEdit *edit = new QTextEdit();
edit->setText(MOBase::readFileText(fileName));
edit->setReadOnly(true);
return edit;
}
QWidget *PreviewGenerator::genDDSPreview(const QString &fileName) const
{
QGLWidget glWidget;
glWidget.makeCurrent();
GLuint texture = glWidget.bindTexture(fileName);
if (!texture)
return nullptr;
// Determine the size of the DDS image
GLint width, height;
glBindTexture(GL_TEXTURE_2D, texture);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height);
if (width == 0 || height == 0)
return nullptr;
QGLPixelBuffer pbuffer(QSize(width, height), glWidget.format(), &glWidget);
if (!pbuffer.makeCurrent())
return nullptr;
pbuffer.drawTexture(QRectF(-1, -1, 2, 2), texture);
QLabel *label = new QLabel();
QImage image = pbuffer.toImage();
if ((image.size().width() > m_MaxSize.width()) ||
(image.size().height() > m_MaxSize.height())) {
image = image.scaled(m_MaxSize, Qt::KeepAspectRatio);
}
label->setPixmap(QPixmap::fromImage(image));
return label;
}
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