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39
40#ifndef QBMPHANDLER_P_H
41#define QBMPHANDLER_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtGui/private/qtguiglobal_p.h>
55#include "QtGui/qimageiohandler.h"
56
57#ifndef QT_NO_IMAGEFORMAT_BMP
58
59QT_BEGIN_NAMESPACE
60
61struct BMP_FILEHDR { // BMP file header
62 char bfType[2]; // "BM"
63 qint32 bfSize; // size of file
64 qint16 bfReserved1;
65 qint16 bfReserved2;
66 qint32 bfOffBits; // pointer to the pixmap bits
67};
68
69struct BMP_INFOHDR { // BMP information header
70 qint32 biSize; // size of this struct
71 qint32 biWidth; // pixmap width
72 qint32 biHeight; // pixmap height
73 qint16 biPlanes; // should be 1
74 qint16 biBitCount; // number of bits per pixel
75 qint32 biCompression; // compression method
76 qint32 biSizeImage; // size of image
77 qint32 biXPelsPerMeter; // horizontal resolution
78 qint32 biYPelsPerMeter; // vertical resolution
79 qint32 biClrUsed; // number of colors used
80 qint32 biClrImportant; // number of important colors
81 // V4:
82 quint32 biRedMask;
83 quint32 biGreenMask;
84 quint32 biBlueMask;
85 quint32 biAlphaMask;
86 qint32 biCSType;
87 qint32 biEndpoints[9];
88 qint32 biGammaRed;
89 qint32 biGammaGreen;
90 qint32 biGammaBlue;
91 // V5:
92 qint32 biIntent;
93 qint32 biProfileData;
94 qint32 biProfileSize;
95 qint32 biReserved;
96};
97
98// BMP-Handler, which is also able to read and write the DIB
99// (Device-Independent-Bitmap) format used internally in the Windows operating
100// system for OLE/clipboard operations. DIB is a subset of BMP (without file
101// header). The Windows platform plugin accesses the DIB-functionality.
102
103class QBmpHandler : public QImageIOHandler
104{
105public:
106 enum InternalFormat {
107 DibFormat,
108 BmpFormat
109 };
110
111 explicit QBmpHandler(InternalFormat fmt = BmpFormat);
112 bool canRead() const override;
113 bool read(QImage *image) override;
114 bool write(const QImage &image) override;
115
116 static bool canRead(QIODevice *device);
117
118 QVariant option(ImageOption option) const override;
119 void setOption(ImageOption option, const QVariant &value) override;
120 bool supportsOption(ImageOption option) const override;
121
122private:
123 bool readHeader();
124 inline QByteArray formatName() const;
125
126 enum State {
127 Ready,
128 ReadHeader,
129 Error
130 };
131
132 const InternalFormat m_format;
133
134 State state;
135 BMP_FILEHDR fileHeader;
136 BMP_INFOHDR infoHeader;
137 qint64 startpos;
138};
139
140QT_END_NAMESPACE
141
142#endif // QT_NO_IMAGEFORMAT_BMP
143
144#endif // QBMPHANDLER_P_H
145