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Diffstat (limited to 'src/plugins/imageformats/tga/qtgafile.h')
| -rw-r--r-- | src/plugins/imageformats/tga/qtgafile.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/plugins/imageformats/tga/qtgafile.h b/src/plugins/imageformats/tga/qtgafile.h new file mode 100644 index 0000000..8aaaf1c --- /dev/null +++ b/src/plugins/imageformats/tga/qtgafile.h @@ -0,0 +1,157 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the TGA plugin in the Qt ImageFormats module. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QTGAFILE_H +#define QTGAFILE_H + +#include <QtGui/QColor> +#include <QtGui/QImage> + +QT_BEGIN_NAMESPACE + +class QIODevice; + +class QTgaFile +{ +public: + enum Compression { + NoCompression = 0, + RleCompression = 1 + }; + + enum HeaderOffset { + IdLength = 0, /* 00h Size of Image ID field */ + ColorMapType = 1, /* 01h Color map type */ + ImageType = 2, /* 02h Image type code */ + CMapStart = 3, /* 03h Color map origin */ + CMapLength = 5, /* 05h Color map length */ + CMapDepth = 7, /* 07h Depth of color map entries */ + XOffset = 8, /* 08h X origin of image */ + YOffset = 10, /* 0Ah Y origin of image */ + Width = 12, /* 0Ch Width of image */ + Height = 14, /* 0Eh Height of image */ + PixelDepth = 16, /* 10h Image pixel size */ + ImageDescriptor = 17, /* 11h Image descriptor byte */ + HeaderSize = 18 + }; + + enum FooterOffset { + ExtensionOffset = 0, + DeveloperOffset = 4, + SignatureOffset = 8, + FooterSize = 26 + }; + + QTgaFile(QIODevice *); + ~QTgaFile(); + + inline bool isValid() const; + inline QString errorMessage() const; + QImage readImage(); + inline int xOffset() const; + inline int yOffset() const; + inline int width() const; + inline int height() const; + inline QSize size() const; + inline Compression compression() const; + +private: + static inline quint16 littleEndianInt(const unsigned char *d); + + QString mErrorMessage; + unsigned char mHeader[HeaderSize]; + QIODevice *mDevice; +}; + +inline bool QTgaFile::isValid() const +{ + return mErrorMessage.isEmpty(); +} + +inline QString QTgaFile::errorMessage() const +{ + return mErrorMessage; +} + +/*! + \internal + Returns the integer encoded in the two little endian bytes at \a d. +*/ +inline quint16 QTgaFile::littleEndianInt(const unsigned char *d) +{ + return d[0] + d[1] * 256; +} + +inline int QTgaFile::xOffset() const +{ + return littleEndianInt(&mHeader[XOffset]); +} + +inline int QTgaFile::yOffset() const +{ + return littleEndianInt(&mHeader[YOffset]); +} + +inline int QTgaFile::width() const +{ + return littleEndianInt(&mHeader[Width]); +} + +inline int QTgaFile::height() const +{ + return littleEndianInt(&mHeader[Height]); +} + +inline QSize QTgaFile::size() const +{ + return QSize(width(), height()); +} + +inline QTgaFile::Compression QTgaFile::compression() const +{ + // TODO: for now, only handle type 2 files, with no color table + // and no compression + return NoCompression; +} + +QT_END_NAMESPACE + +#endif // QTGAFILE_H |