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/* This file is (c) 2014 Abs62
* Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */
#include "tiff.hh"
#ifdef MAKE_EXTRA_TIFF_HANDLER
#if defined (Q_OS_WIN)
#include "tiff/tiff.h"
#include "tiff/tiffio.h"
#else
#include "tiff.h"
#include "tiffio.h"
#endif
#endif
#include <QBuffer>
#include <QApplication>
#include <QScreen>
namespace GdTiff
{
#ifdef MAKE_EXTRA_TIFF_HANDLER
tsize_t tiffReadProc( thandle_t fd, tdata_t buf, tsize_t size )
{
return static_cast< QIODevice * >( fd )->read( static_cast< char * >( buf ), size );
}
tsize_t tiffWriteProc( thandle_t fd, tdata_t buf, tsize_t size )
{
Q_UNUSED( fd )
Q_UNUSED( buf )
Q_UNUSED( size )
return 0;
}
toff_t tiffSeekProc( thandle_t fd, toff_t off, int whence )
{
QIODevice * device = static_cast< QIODevice * >( fd );
switch (whence) {
case SEEK_SET:
device->seek( off );
break;
case SEEK_CUR:
device->seek( device->pos() + off );
break;
case SEEK_END:
device->seek( device->size() + off );
break;
}
return device->pos();
}
int tiffCloseProc( thandle_t fd )
{
Q_UNUSED( fd )
return 0;
}
toff_t tiffSizeProc( thandle_t fd )
{
return static_cast< QIODevice * >( fd )->size();
}
int tiffMapProc( thandle_t fd, tdata_t * pbase, toff_t * psize )
{
Q_UNUSED( fd )
Q_UNUSED( pbase )
Q_UNUSED( psize )
return 0;
}
void tiffUnmapProc( thandle_t fd, tdata_t base, toff_t size )
{
Q_UNUSED( fd )
Q_UNUSED( base )
Q_UNUSED( size )
}
bool tiffToQImage( const char * data, int size, QImage & image )
{
QByteArray arr = QByteArray::fromRawData( data, size );
QBuffer buf;
buf.setData( arr );
buf.open( QIODevice::ReadOnly );
TIFF *const tiff = TIFFClientOpen( "foo",
"r",
&buf,
tiffReadProc,
tiffWriteProc,
tiffSeekProc,
tiffCloseProc,
tiffSizeProc,
tiffMapProc,
tiffUnmapProc );
if( !tiff )
return false;
uint32 width, height;
if( !TIFFGetField( tiff, TIFFTAG_IMAGEWIDTH, &width )
|| !TIFFGetField( tiff, TIFFTAG_IMAGELENGTH, &height ) )
{
TIFFClose( tiff );
return false;
}
uint16 bitPerSample;
if( !TIFFGetField( tiff, TIFFTAG_BITSPERSAMPLE, &bitPerSample ) )
bitPerSample = 1;
uint16 samplesPerPixel; // they may be e.g. grayscale with 2 samples per pixel
if( !TIFFGetField( tiff, TIFFTAG_SAMPLESPERPIXEL, &samplesPerPixel ) )
samplesPerPixel = 1;
if( bitPerSample == 1 && samplesPerPixel == 1 )
{
QImage tiffImage( width, height, QImage::Format_Mono );
QVector<QRgb> colortable( 2 );
colortable[0] = 0xffffffff;
colortable[1] = 0xff000000;
tiffImage.setColorTable( colortable );
for ( uint32 y = 0; y < height; ++y )
{
if( TIFFReadScanline( tiff, tiffImage.scanLine( y ), y, 0 ) < 0 )
{
TIFFClose( tiff );
return false;
}
}
image = tiffImage;
TIFFClose( tiff );
return true;
}
TIFFClose( tiff );
return false;
}
#endif
void tiff2img( vector< char > & data, const char * format )
{
QImage img = QImage::fromData( (unsigned char *)&data.front(), data.size() );
#ifdef MAKE_EXTRA_TIFF_HANDLER
if( img.isNull() )
tiffToQImage( &data.front(), data.size(), img );
#endif
if( !img.isNull() )
{
QByteArray ba;
QBuffer buffer( &ba );
buffer.open( QIODevice::WriteOnly );
QSize screenSize = QApplication::primaryScreen()->availableSize();
QSize imgSize = img.size();
int scaleSize = qMin( imgSize.width(), screenSize.width() );
img.scaledToWidth( scaleSize ).save( &buffer, format );
data.resize( buffer.size() );
memcpy( &data.front(), buffer.data(), data.size() );
buffer.close();
}
}
} // namespace
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