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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Copyright (C) 2016 Alex Char.
** Contact: https://www.qt.io/licensing/
**
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.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'), // Icon Composer version
// Legacy:
TypeClut = MAKEOSTYPE('c', 'l', 'u', 't'), // Color look-up table (pre-OS X resources)
TypeTile = MAKEOSTYPE('t', 'i', 'l', 'e'), // Container (icon variants)
TypeOver = MAKEOSTYPE('o', 'v', 'e', 'r'), // Container (icon variants)
TypeOpen = MAKEOSTYPE('o', 'p', 'e', 'n'), // Container (icon variants)
TypeDrop = MAKEOSTYPE('d', 'r', 'o', 'p'), // Container (icon variants)
TypeOdrp = MAKEOSTYPE('o', 'd', 'r', 'p'), // Container (icon variants)
};
quint32 ostype;
quint32 length;
};
struct ICNSEntry
{
enum Group {
GroupUnknown = 0, // Default for invalid ones
GroupMini = 'm', // "mini" (16x12)
GroupSmall = 's', // "small" (16x16)
GroupLarge = 'l', // "large" (32x32)
GroupHuge = 'h', // "huge" (48x48)
GroupThumbnail = 't', // "thumbnail" (128x128)
GroupPortable = 'p', // "portable"? (Speculation, used for png/jp2)
GroupCompressed = 'c', // "compressed"? (Speculation, used for png/jp2)
// Legacy icons:
GroupICON = 'N', // "ICON" (32x32)
};
enum Depth {
DepthUnknown = 0, // Default for invalid or compressed ones
DepthMono = 1,
Depth4bit = 4,
Depth8bit = 8,
Depth32bit = 32
};
enum Flags {
Unknown = 0x0, // Default for invalid ones
IsIcon = 0x1, // Contains a raw icon without alpha or compressed icon
IsMask = 0x2, // Contains alpha mask
IconPlusMask = IsIcon | IsMask // Contains raw icon and mask combined in one entry (double size)
};
enum Format {
FormatUnknown = 0, // Default for invalid or undetermined ones
RawIcon, // Raw legacy icon, uncompressed
RLE24, // Raw 32bit icon, data is compressed
PNG, // Compressed icon in PNG format
JP2 // Compressed icon in JPEG2000 format
};
quint32 ostype; // Real OSType
quint32 variant; // Virtual OSType: a parent container, zero if parent is icns root
Group group; // ASCII character number
quint32 width; // For uncompressed icons only, zero for compressed ones for now
quint32 height; // For uncompressed icons only, zero for compressed ones fow now
Depth depth; // Color depth
Flags flags; // Flags to determine the type of entry
Format dataFormat; // Format of the image data
quint32 dataLength; // Length of the image data in bytes
qint64 dataOffset; // Offset from the initial position of the file/device
ICNSEntry() :
ostype(0), variant(0), group(GroupUnknown), width(0), height(0), depth(DepthUnknown),
flags(Unknown), dataFormat(FormatUnknown), dataLength(0), dataOffset(0)
{
}
};
Q_DECLARE_TYPEINFO(ICNSEntry, Q_MOVABLE_TYPE);
class QICNSHandler : public QImageIOHandler
{
public:
QICNSHandler();
bool canRead() const override;
bool read(QImage *image) override;
bool write(const QImage &image) override;
#if QT_DEPRECATED_SINCE(5, 13)
QByteArray name() const override;
#endif
bool supportsOption(ImageOption option) const override;
QVariant option(ImageOption option) const override;
int imageCount() const override;
bool jumpToImage(int imageNumber) override;
bool jumpToNextImage() override;
static bool canRead(QIODevice *device);
private:
bool ensureScanned() const;
bool scanDevice();
bool addEntry(const ICNSBlockHeader &header, qint64 imgDataOffset, quint32 variant = 0);
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 */
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