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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
#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/private/qtguiglobal_p.h>
#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
// V4:
quint32 biRedMask;
quint32 biGreenMask;
quint32 biBlueMask;
quint32 biAlphaMask;
qint32 biCSType;
qint32 biEndpoints[9];
qint32 biGammaRed;
qint32 biGammaGreen;
qint32 biGammaBlue;
// V5:
qint32 biIntent;
qint32 biProfileData;
qint32 biProfileSize;
qint32 biReserved;
};
// 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 platform plugin accesses the DIB-functionality.
class QBmpHandler : public QImageIOHandler
{
public:
enum InternalFormat {
DibFormat,
BmpFormat
};
explicit QBmpHandler(InternalFormat fmt = BmpFormat);
bool canRead() const override;
bool read(QImage *image) override;
bool write(const QImage &image) override;
static bool canRead(QIODevice *device);
QVariant option(ImageOption option) const override;
void setOption(ImageOption option, const QVariant &value) override;
bool supportsOption(ImageOption option) const override;
private:
bool readHeader();
inline QByteArray formatName() const;
enum State {
Ready,
ReadHeader,
Error
};
const InternalFormat m_format;
State state;
BMP_FILEHDR fileHeader;
BMP_INFOHDR infoHeader;
qint64 startpos;
};
QT_END_NAMESPACE
#endif // QT_NO_IMAGEFORMAT_BMP
#endif // QBMPHANDLER_P_H
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