Some work about adaptive color scheme for Web UI (PR #19901)
http://[316:c51a:62a3:8b9::4]/d4708/qBittorrent/src/branch/adaptive-webui
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468 lines
14 KiB
468 lines
14 KiB
16 years ago
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/*
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* kimgio import filter for MS Windows .ico files
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*
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* Distributed under the terms of the LGPL
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* Copyright (c) 2000 Malte Starostik <malte@kde.org>
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*
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*/
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#include "ico.h"
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#include <cstring>
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#include <cstdlib>
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#include <algorithm>
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#include <vector>
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16 years ago
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#include <QImage>
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#include <QBitmap>
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#include <QApplication>
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#include <QVector>
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#include <QDesktopWidget>
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16 years ago
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namespace
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{
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// Global header (see http://www.daubnet.com/formats/ICO.html)
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struct IcoHeader
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{
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enum Type { Icon = 1, Cursor };
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quint16 reserved;
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quint16 type;
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quint16 count;
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};
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inline QDataStream& operator >>( QDataStream& s, IcoHeader& h )
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{
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return s >> h.reserved >> h.type >> h.count;
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}
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// Based on qt_read_dib et al. from qimage.cpp
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// (c) 1992-2002 Trolltech AS.
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struct BMP_INFOHDR
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{
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static const quint32 Size = 40;
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quint32 biSize; // size of this struct
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quint32 biWidth; // pixmap width
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quint32 biHeight; // pixmap height
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quint16 biPlanes; // should be 1
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quint16 biBitCount; // number of bits per pixel
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enum Compression { RGB = 0 };
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quint32 biCompression; // compression method
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quint32 biSizeImage; // size of image
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quint32 biXPelsPerMeter; // horizontal resolution
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quint32 biYPelsPerMeter; // vertical resolution
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quint32 biClrUsed; // number of colors used
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quint32 biClrImportant; // number of important colors
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};
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const quint32 BMP_INFOHDR::Size;
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QDataStream& operator >>( QDataStream &s, BMP_INFOHDR &bi )
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{
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s >> bi.biSize;
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if ( bi.biSize == BMP_INFOHDR::Size )
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{
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s >> bi.biWidth >> bi.biHeight >> bi.biPlanes >> bi.biBitCount;
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s >> bi.biCompression >> bi.biSizeImage;
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s >> bi.biXPelsPerMeter >> bi.biYPelsPerMeter;
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s >> bi.biClrUsed >> bi.biClrImportant;
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}
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return s;
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}
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#if 0
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QDataStream &operator<<( QDataStream &s, const BMP_INFOHDR &bi )
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{
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s << bi.biSize;
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s << bi.biWidth << bi.biHeight;
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s << bi.biPlanes;
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s << bi.biBitCount;
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s << bi.biCompression;
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s << bi.biSizeImage;
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s << bi.biXPelsPerMeter << bi.biYPelsPerMeter;
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s << bi.biClrUsed << bi.biClrImportant;
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return s;
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}
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#endif
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// Header for every icon in the file
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struct IconRec
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{
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unsigned char width;
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unsigned char height;
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quint16 colors;
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quint16 hotspotX;
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quint16 hotspotY;
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quint32 size;
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quint32 offset;
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};
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inline QDataStream& operator >>( QDataStream& s, IconRec& r )
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{
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return s >> r.width >> r.height >> r.colors
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>> r.hotspotX >> r.hotspotY >> r.size >> r.offset;
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}
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struct LessDifference
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{
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LessDifference( unsigned s, unsigned c )
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: size( s ), colors( c ) {}
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bool operator ()( const IconRec& lhs, const IconRec& rhs ) const
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{
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// closest size match precedes everything else
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if ( std::abs( int( lhs.width - size ) ) <
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std::abs( int( rhs.width - size ) ) ) return true;
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else if ( std::abs( int( lhs.width - size ) ) >
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std::abs( int( rhs.width - size ) ) ) return false;
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else if ( colors == 0 )
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{
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// high/true color requested
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if ( lhs.colors == 0 ) return true;
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else if ( rhs.colors == 0 ) return false;
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else return lhs.colors > rhs.colors;
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}
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else
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{
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// indexed icon requested
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if ( lhs.colors == 0 && rhs.colors == 0 ) return false;
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else if ( lhs.colors == 0 ) return false;
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else return std::abs( int( lhs.colors - colors ) ) <
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std::abs( int( rhs.colors - colors ) );
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}
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}
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unsigned size;
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unsigned colors;
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};
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bool loadFromDIB( QDataStream& stream, const IconRec& rec, QImage& icon )
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{
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BMP_INFOHDR header;
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stream >> header;
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if ( stream.atEnd() || header.biSize != BMP_INFOHDR::Size ||
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header.biSize > rec.size ||
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header.biCompression != BMP_INFOHDR::RGB ||
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( header.biBitCount != 1 && header.biBitCount != 4 &&
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header.biBitCount != 8 && header.biBitCount != 24 &&
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header.biBitCount != 32 ) ) return false;
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unsigned paletteSize, paletteEntries;
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if (header.biBitCount > 8)
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{
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paletteEntries = 0;
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paletteSize = 0;
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}
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else
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{
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paletteSize = (1 << header.biBitCount);
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paletteEntries = paletteSize;
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if (header.biClrUsed && header.biClrUsed < paletteSize)
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paletteEntries = header.biClrUsed;
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}
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// Always create a 32-bit image to get the mask right
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// Note: this is safe as rec.width, rec.height are bytes
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icon = QImage( rec.width, rec.height, QImage::Format_ARGB32 );
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if ( icon.isNull() ) return false;
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QVector< QRgb > colorTable( paletteSize );
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colorTable.fill( QRgb( 0 ) );
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for ( unsigned i = 0; i < paletteEntries; ++i )
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{
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unsigned char rgb[ 4 ];
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stream.readRawData( reinterpret_cast< char* >( &rgb ),
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sizeof( rgb ) );
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colorTable[ i ] = qRgb( rgb[ 2 ], rgb[ 1 ], rgb[ 0 ] );
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}
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unsigned bpl = ( rec.width * header.biBitCount + 31 ) / 32 * 4;
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unsigned char* buf = new unsigned char[ bpl ];
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for ( unsigned y = rec.height; !stream.atEnd() && y--; )
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{
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stream.readRawData( reinterpret_cast< char* >( buf ), bpl );
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unsigned char* pixel = buf;
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16 years ago
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QRgb* p = reinterpret_cast< QRgb* >( icon.scanLine(y));
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switch ( header.biBitCount )
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{
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case 1:
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for ( unsigned x = 0; x < rec.width; ++x )
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*p++ = colorTable[
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( pixel[ x / 8 ] >> ( 7 - ( x & 0x07 ) ) ) & 1 ];
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break;
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case 4:
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for ( unsigned x = 0; x < rec.width; ++x )
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if ( x & 1 ) *p++ = colorTable[ pixel[ x / 2 ] & 0x0f ];
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else *p++ = colorTable[ pixel[ x / 2 ] >> 4 ];
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break;
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case 8:
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for ( unsigned x = 0; x < rec.width; ++x )
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*p++ = colorTable[ pixel[ x ] ];
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break;
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case 24:
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for ( unsigned x = 0; x < rec.width; ++x )
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*p++ = qRgb( pixel[ 3 * x + 2 ],
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pixel[ 3 * x + 1 ],
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pixel[ 3 * x ] );
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break;
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case 32:
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for ( unsigned x = 0; x < rec.width; ++x )
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*p++ = qRgba( pixel[ 4 * x + 2 ],
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pixel[ 4 * x + 1 ],
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pixel[ 4 * x ],
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pixel[ 4 * x + 3] );
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break;
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}
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}
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delete[] buf;
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if ( header.biBitCount < 32 )
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{
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// Traditional 1-bit mask
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bpl = ( rec.width + 31 ) / 32 * 4;
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buf = new unsigned char[ bpl ];
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for ( unsigned y = rec.height; y--; )
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{
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stream.readRawData( reinterpret_cast< char* >( buf ), bpl );
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16 years ago
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QRgb* p = reinterpret_cast< QRgb* >(icon.scanLine(y));
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16 years ago
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for ( unsigned x = 0; x < rec.width; ++x, ++p )
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if ( ( ( buf[ x / 8 ] >> ( 7 - ( x & 0x07 ) ) ) & 1 ) )
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*p &= RGB_MASK;
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}
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delete[] buf;
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}
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return true;
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}
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}
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ICOHandler::ICOHandler()
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{
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}
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bool ICOHandler::canRead() const
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{
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if (canRead(device())) {
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setFormat("ico");
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return true;
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}
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return false;
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}
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bool ICOHandler::read(QImage *outImage)
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{
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qint64 offset = device()->pos();
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QDataStream stream( device() );
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stream.setByteOrder( QDataStream::LittleEndian );
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IcoHeader header;
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stream >> header;
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if ( stream.atEnd() || !header.count ||
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( header.type != IcoHeader::Icon && header.type != IcoHeader::Cursor) )
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return false;
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unsigned requestedSize = 32;
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unsigned requestedColors = QApplication::desktop()->depth() > 8 ? 0 : QApplication::desktop()->depth();
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int requestedIndex = -1;
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#if 0
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if ( io->parameters() )
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{
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QStringList params = QString(io->parameters()).split( ';', QString::SkipEmptyParts );
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QMap< QString, QString > options;
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for ( QStringList::ConstIterator it = params.begin();
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it != params.end(); ++it )
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{
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QStringList tmp = (*it).split( '=', QString::SkipEmptyParts );
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if ( tmp.count() == 2 ) options[ tmp[ 0 ] ] = tmp[ 1 ];
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}
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if ( options[ "index" ].toUInt() )
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requestedIndex = options[ "index" ].toUInt();
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if ( options[ "size" ].toUInt() )
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requestedSize = options[ "size" ].toUInt();
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if ( options[ "colors" ].toUInt() )
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requestedColors = options[ "colors" ].toUInt();
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}
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#endif
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typedef std::vector< IconRec > IconList;
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IconList icons;
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for ( unsigned i = 0; i < header.count; ++i )
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{
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if ( stream.atEnd() )
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return false;
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IconRec rec;
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stream >> rec;
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icons.push_back( rec );
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}
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IconList::const_iterator selected;
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if (requestedIndex >= 0) {
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selected = std::min( icons.begin() + requestedIndex, icons.end() );
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} else {
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selected = std::min_element( icons.begin(), icons.end(),
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LessDifference( requestedSize, requestedColors ) );
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}
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if ( stream.atEnd() || selected == icons.end() ||
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offset + selected->offset > device()->size() )
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return false;
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device()->seek( offset + selected->offset );
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QImage icon;
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if ( loadFromDIB( stream, *selected, icon ) )
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{
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11 years ago
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icon.setText( "X-Index", QString::number( selected - icons.begin() ) );
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16 years ago
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if ( header.type == IcoHeader::Cursor )
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{
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11 years ago
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icon.setText( "X-HotspotX", QString::number( selected->hotspotX ) );
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icon.setText( "X-HotspotY", QString::number( selected->hotspotY ) );
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16 years ago
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}
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*outImage = icon;
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return true;
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}
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return false;
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}
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bool ICOHandler::write(const QImage &/*image*/)
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{
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#if 0
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if (image.isNull())
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return;
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QByteArray dibData;
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QDataStream dib(dibData, QIODevice::ReadWrite);
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dib.setByteOrder(QDataStream::LittleEndian);
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QImage pixels = image;
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QImage mask;
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if (io->image().hasAlphaBuffer())
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mask = image.createAlphaMask();
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else
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mask = image.createHeuristicMask();
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mask.invertPixels();
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for ( int y = 0; y < pixels.height(); ++y )
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for ( int x = 0; x < pixels.width(); ++x )
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if ( mask.pixel( x, y ) == 0 ) pixels.setPixel( x, y, 0 );
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if (!qt_write_dib(dib, pixels))
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return;
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uint hdrPos = dib.device()->at();
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if (!qt_write_dib(dib, mask))
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return;
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memmove(dibData.data() + hdrPos, dibData.data() + hdrPos + BMP_WIN + 8, dibData.size() - hdrPos - BMP_WIN - 8);
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dibData.resize(dibData.size() - BMP_WIN - 8);
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QDataStream ico(device());
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ico.setByteOrder(QDataStream::LittleEndian);
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IcoHeader hdr;
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hdr.reserved = 0;
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hdr.type = Icon;
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hdr.count = 1;
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ico << hdr.reserved << hdr.type << hdr.count;
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IconRec rec;
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rec.width = image.width();
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rec.height = image.height();
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if (image.numColors() <= 16)
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rec.colors = 16;
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else if (image.depth() <= 8)
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rec.colors = 256;
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else
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rec.colors = 0;
|
||
|
|
rec.hotspotX = 0;
|
||
|
|
rec.hotspotY = 0;
|
||
|
|
rec.dibSize = dibData.size();
|
||
|
|
ico << rec.width << rec.height << rec.colors
|
||
|
|
<< rec.hotspotX << rec.hotspotY << rec.dibSize;
|
||
|
|
rec.dibOffset = ico.device()->at() + sizeof(rec.dibOffset);
|
||
|
|
ico << rec.dibOffset;
|
||
|
|
|
||
|
|
BMP_INFOHDR dibHeader;
|
||
|
|
dib.device()->at(0);
|
||
|
|
dib >> dibHeader;
|
||
|
|
dibHeader.biHeight = image.height() << 1;
|
||
|
|
dib.device()->at(0);
|
||
|
|
dib << dibHeader;
|
||
|
|
|
||
|
|
ico.writeRawBytes(dibData.data(), dibData.size());
|
||
|
|
return true;
|
||
|
|
#endif
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
QByteArray ICOHandler::name() const
|
||
|
|
{
|
||
|
|
return "ico";
|
||
|
|
}
|
||
|
|
|
||
|
|
bool ICOHandler::canRead(QIODevice *device)
|
||
|
|
{
|
||
|
|
if (!device) {
|
||
|
|
qWarning("ICOHandler::canRead() called with no device");
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
const qint64 oldPos = device->pos();
|
||
|
|
|
||
|
|
char head[8];
|
||
|
|
qint64 readBytes = device->read(head, sizeof(head));
|
||
|
|
const bool readOk = readBytes == sizeof(head);
|
||
|
|
|
||
|
|
if (device->isSequential()) {
|
||
|
|
while (readBytes > 0)
|
||
|
|
device->ungetChar(head[readBytes-- - 1]);
|
||
|
|
} else {
|
||
|
|
device->seek(oldPos);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( !readOk )
|
||
|
|
return false;
|
||
|
|
|
||
|
|
return head[2] == '\001' && head[3] == '\000' && // type should be 1
|
||
|
|
( head[6] == 16 || head[6] == 32 || head[6] == 64 ) && // width can only be one of those
|
||
|
|
( head[7] == 16 || head[7] == 32 || head[7] == 64 ); // same for height
|
||
|
|
}
|
||
|
|
|
||
|
|
class ICOPlugin : public QImageIOPlugin
|
||
|
|
{
|
||
|
11 years ago
|
#if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
|
||
|
|
Q_PLUGIN_METADATA(IID "org.qbittorrent.ICOPlugin")
|
||
|
|
#endif
|
||
|
16 years ago
|
public:
|
||
|
|
QStringList keys() const;
|
||
|
|
Capabilities capabilities(QIODevice *device, const QByteArray &format) const;
|
||
|
|
QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const;
|
||
|
|
};
|
||
|
|
|
||
|
|
QStringList ICOPlugin::keys() const
|
||
|
|
{
|
||
|
|
return QStringList() << "ico" << "ICO";
|
||
|
|
}
|
||
|
|
|
||
|
|
QImageIOPlugin::Capabilities ICOPlugin::capabilities(QIODevice *device, const QByteArray &format) const
|
||
|
|
{
|
||
|
|
if (format == "ico" || format == "ICO")
|
||
|
|
return Capabilities(CanRead);
|
||
|
|
if (!format.isEmpty())
|
||
|
|
return 0;
|
||
|
|
if (!device->isOpen())
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
Capabilities cap;
|
||
|
|
if (device->isReadable() && ICOHandler::canRead(device))
|
||
|
|
cap |= CanRead;
|
||
|
|
return cap;
|
||
|
|
}
|
||
|
|
|
||
|
|
QImageIOHandler *ICOPlugin::create(QIODevice *device, const QByteArray &format) const
|
||
|
|
{
|
||
|
|
QImageIOHandler *handler = new ICOHandler;
|
||
|
|
handler->setDevice(device);
|
||
|
|
handler->setFormat(format);
|
||
|
|
return handler;
|
||
|
|
}
|
||
|
|
|
||
|
11 years ago
|
#if (QT_VERSION < QT_VERSION_CHECK(5, 0, 0))
|
||
|
16 years ago
|
Q_EXPORT_STATIC_PLUGIN(ICOPlugin)
|
||
|
|
Q_EXPORT_PLUGIN2(ico, ICOPlugin)
|
||
|
11 years ago
|
#endif
|