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Diffstat (limited to 'src/plugins/imageformats/icns/qicnshandler_p.h')
| -rw-r--r-- | src/plugins/imageformats/icns/qicnshandler_p.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/plugins/imageformats/icns/qicnshandler_p.h b/src/plugins/imageformats/icns/qicnshandler_p.h new file mode 100644 index 0000000..0bfb76d --- /dev/null +++ b/src/plugins/imageformats/icns/qicnshandler_p.h @@ -0,0 +1,151 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Copyright (C) 2013 Alex Char. +** Contact: http://www.qt-project.org/legal +** +** This file is part of the plugins of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional +** rights. These rights are described in the Digia 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. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QICNSHANDLER_P_H +#define QICNSHANDLER_P_H + +#include <QtGui/qimageiohandler.h> +#include <QtCore/qvector.h> + +#ifndef QT_NO_DATASTREAM + +#define MAKEOSTYPE(c0,c1,c2,c3) (((quint8)c0 << 24) | ((quint8)c1 << 16) | ((quint8)c2 << 8) | (quint8)c3) + +QT_BEGIN_NAMESPACE + +struct ICNSBlockHeader +{ + enum OS { + TypeIcns = MAKEOSTYPE('i', 'c', 'n', 's'), // Icns container magic + TypeToc = MAKEOSTYPE('T', 'O', 'C', ' '), // Table of contents + TypeIcnv = MAKEOSTYPE('i', 'c', 'n', 'V'), // Version of the icns tool + // Legacy: + TypeClut = MAKEOSTYPE('c', 'l', 'u', 't') // Color look-up table (pre-OS X resources) + }; + + quint32 ostype; + quint32 length; +}; + +struct ICNSEntry +{ + enum Group { + GroupUnknown = 0, + GroupMini = 'm', // "mini" (16x12) + GroupSmall = 's', // "small" (16x16) + GroupLarge = 'l', // "large" (32x32) + GroupHuge = 'h', // "huge" (48x48) + GroupThumbnail = 't', // "thumbnail" (128x128) + GroupPortable = 'p', // "portable"? (various sizes, png/jp2) + GroupCompressed = 'c', // "compressed"? (various sizes, png/jp2) + // Legacy icons: + GroupICON = 'N', // "ICON" (32x32) + }; + enum Depth { + DepthUnknown = 0, // Default for invalid ones + DepthMono = 1, + Depth4bit = 4, + Depth8bit = 8, + Depth32bit = 32 + }; + enum Mask { + MaskUnknown = 0x0, // Default for invalid ones + IsIcon = 0x1, // Plain icon without alpha + IsMask = 0x2, // The whole icon entry is alpha mask + IconPlusMask = IsMask | IsIcon // Plain icon and alpha mask (double size) + }; + + ICNSBlockHeader header; // Original block header + Group group; // ASCII character number pointing to a format + Depth depth; // Color depth or icon format number for compressed icons + Mask mask; // Flags for uncompressed, should be always IsIcon (0x1) for compressed + quint32 width; // For uncompressed icons only, zero for compressed ones for now + quint32 height; // For uncompressed icons only, zero for compressed ones fow now + quint32 dataLength; // header.length - sizeof(header) + quint32 dataOffset; // Offset from the initial position of the file/device + bool dataIsRLE; // 32bit raw icons may be in rle24 compressed state +}; + +class QICNSHandler : public QImageIOHandler +{ +public: + QICNSHandler(); + + bool canRead() const; + bool read(QImage *image); + bool write(const QImage &image); + + QByteArray name() const; + + bool supportsOption(ImageOption option) const; + QVariant option(ImageOption option) const; + + int imageCount() const; + bool jumpToImage(int imageNumber); + bool jumpToNextImage(); + + static bool canRead(QIODevice *device); + +private: + bool ensureScanned() const; + bool scanDevice(); + void addEntry(const ICNSBlockHeader &header, quint32 imgDataOffset); + const ICNSEntry &getIconMask(const ICNSEntry &icon) const; + +private: + enum ScanState { + ScanError = -1, + ScanNotScanned = 0, + ScanSuccess = 1, + }; + + int m_currentIconIndex; + QVector<ICNSEntry> m_icons; + QVector<ICNSEntry> m_masks; + ScanState m_state; +}; + +QT_END_NAMESPACE + +#endif // QT_NO_DATASTREAM + +#endif /* QICNSHANDLER_P_H */ |