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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qtgahandler.h"
#include "qtgafile.h"
#include <QtCore/QVariant>
#include <QtCore/QDebug>
#include <QtGui/QImage>
QT_BEGIN_NAMESPACE
QTgaHandler::QTgaHandler()
: QImageIOHandler()
, tga(0)
{
}
QTgaHandler::~QTgaHandler()
{
delete tga;
}
bool QTgaHandler::canRead() const
{
if (!tga)
tga = new QTgaFile(device());
if (tga->isValid())
{
setFormat("tga");
return true;
}
qWarning("QTgaHandler::canRead(): %s", qPrintable(tga->errorMessage()));
return false;
}
bool QTgaHandler::canRead(QIODevice *device)
{
if (!device) {
qWarning("QTgaHandler::canRead() called with no device");
return false;
}
// TGA reader implementation needs a seekable QIODevice, so
// sequential devices are not supported
if (device->isSequential())
return false;
qint64 pos = device->pos();
bool isValid;
{
QTgaFile tga(device);
isValid = tga.isValid();
}
device->seek(pos);
return isValid;
}
bool QTgaHandler::read(QImage *image)
{
if (!canRead())
return false;
*image = tga->readImage();
return !image->isNull();
}
QVariant QTgaHandler::option(ImageOption option) const
{
if (option == Size && canRead()) {
return tga->size();
} else if (option == CompressionRatio) {
return tga->compression();
} else if (option == ImageFormat) {
return QImage::Format_ARGB32;
}
return QVariant();
}
void QTgaHandler::setOption(ImageOption option, const QVariant &value)
{
Q_UNUSED(option);
Q_UNUSED(value);
}
bool QTgaHandler::supportsOption(ImageOption option) const
{
return option == CompressionRatio
|| option == Size
|| option == ImageFormat;
}
QT_END_NAMESPACE
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