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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QBMPHANDLER_P_H
#define QBMPHANDLER_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "QtGui/qimageiohandler.h"
#ifndef QT_NO_IMAGEFORMAT_BMP
QT_BEGIN_NAMESPACE
struct BMP_FILEHDR { // BMP file header
char bfType[2]; // "BM"
qint32 bfSize; // size of file
qint16 bfReserved1;
qint16 bfReserved2;
qint32 bfOffBits; // pointer to the pixmap bits
};
struct BMP_INFOHDR { // BMP information header
qint32 biSize; // size of this struct
qint32 biWidth; // pixmap width
qint32 biHeight; // pixmap height
qint16 biPlanes; // should be 1
qint16 biBitCount; // number of bits per pixel
qint32 biCompression; // compression method
qint32 biSizeImage; // size of image
qint32 biXPelsPerMeter; // horizontal resolution
qint32 biYPelsPerMeter; // vertical resolution
qint32 biClrUsed; // number of colors used
qint32 biClrImportant; // number of important colors
};
// BMP-Handler, which is also able to read and write the DIB
// (Device-Independent-Bitmap) format used internally in the Windows operating
// system for OLE/clipboard operations. DIB is a subset of BMP (without file
// header). The Windows-Lighthouse plugin accesses the DIB-functionality.
class QBmpHandler : public QImageIOHandler
{
public:
enum InternalFormat {
DibFormat,
BmpFormat
};
explicit QBmpHandler(InternalFormat fmt = BmpFormat);
bool canRead() const;
bool read(QImage *image);
bool write(const QImage &image);
QByteArray name() const;
static bool canRead(QIODevice *device);
QVariant option(ImageOption option) const;
void setOption(ImageOption option, const QVariant &value);
bool supportsOption(ImageOption option) const;
private:
bool readHeader();
inline QByteArray formatName() const;
enum State {
Ready,
ReadHeader,
Error
};
const InternalFormat m_format;
State state;
BMP_FILEHDR fileHeader;
BMP_INFOHDR infoHeader;
int startpos;
};
QT_END_NAMESPACE
#endif // QT_NO_IMAGEFORMAT_BMP
#endif // QBMPHANDLER_P_H
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