Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 316 insertions, 0 deletions

diff --git a/kimgio/jp2.cpp b/kimgio/jp2.cpp
new file mode 100644
index 000000000..3e44275d8
--- /dev/null
+++ b/kimgio/jp2.cpp
@@ -0,0 +1,316 @@
+// This library is distributed under the conditions of the GNU LGPL.
+#include "config.h"
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifdef HAVE_JASPER
+
+#include "jp2.h"
+
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#include <ktempfile.h>
+#include <qcolor.h>
+#include <qcstring.h>
+#include <qfile.h>
+#include <qimage.h>
+
+// dirty, but avoids a warning because jasper.h includes jas_config.h.
+#undef PACKAGE
+#undef VERSION
+#include <jasper/jasper.h>
+
+// code taken in parts from JasPer's jiv.c
+
+#define DEFAULT_RATE 0.10
+#define MAXCMPTS 256
+
+
+typedef struct {
+    jas_image_t* image;
+
+    int	cmptlut[MAXCMPTS];
+
+    jas_image_t* altimage;
+} gs_t;
+
+
+jas_image_t*
+read_image( const QImageIO* io )
+{
+    jas_stream_t* in = 0;
+    // for QIODevice's other than QFile, a temp. file is used.
+    KTempFile* tempf = 0;
+
+    QFile* qf = 0;
+    if( ( qf = dynamic_cast<QFile*>( io->ioDevice() ) ) ) {
+        // great, it's a QFile. Let's just take the filename.
+        in = jas_stream_fopen( QFile::encodeName( qf->name() ), "rb" );
+    } else {
+        // not a QFile. Copy the whole data to a temp. file.
+        tempf = new KTempFile();
+        if( tempf->status() != 0 ) {
+            delete tempf;
+            return 0;
+        } // if
+        tempf->setAutoDelete( true );
+        QFile* out = tempf->file();
+        // 4096 (=4k) is a common page size.
+        QByteArray b( 4096 );
+        Q_LONG size;
+        // 0 or -1 is EOF / error
+        while( ( size = io->ioDevice()->readBlock( b.data(), 4096 ) ) > 0 ) {
+            // in case of a write error, still give the decoder a try
+            if( ( out->writeBlock( b.data(), size ) ) == -1 ) break;
+        } // while
+        // flush everything out to disk
+        out->flush();
+
+        in = jas_stream_fopen( QFile::encodeName( tempf->name() ), "rb" );
+    } // else
+    if( !in ) {
+        delete tempf;
+        return 0;
+    } // if
+
+    jas_image_t* image = jas_image_decode( in, -1, 0 );
+    jas_stream_close( in );
+    delete tempf;
+
+    // image may be 0, but that's Ok
+    return image;
+} // read_image
+
+static bool
+convert_colorspace( gs_t& gs )
+{
+    jas_cmprof_t *outprof = jas_cmprof_createfromclrspc( JAS_CLRSPC_SRGB );
+    if( !outprof ) return false;
+
+    gs.altimage = jas_image_chclrspc( gs.image, outprof,
+                                      JAS_CMXFORM_INTENT_PER );
+    if( !gs.altimage ) return false;
+
+    return true;
+} // convert_colorspace
+
+static bool
+render_view( gs_t& gs, QImage& qti )
+{
+    if((gs.cmptlut[0] = jas_image_getcmptbytype(gs.altimage,
+                                                JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_R))) < 0 ||
+       (gs.cmptlut[1] = jas_image_getcmptbytype(gs.altimage,
+                                                JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_G))) < 0 ||
+       (gs.cmptlut[2] = jas_image_getcmptbytype(gs.altimage,
+                                                JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_B))) < 0) {
+        return false;
+    } // if
+
+    const int* cmptlut = gs.cmptlut;
+    int v[3];
+
+    // check that all components have the same size.
+    const int width = jas_image_cmptwidth( gs.altimage, cmptlut[0] );
+    const int height = jas_image_cmptheight( gs.altimage, cmptlut[0] );
+    for( int i = 1; i < 3; ++i ) {
+        if (jas_image_cmptwidth( gs.altimage, cmptlut[i] ) != width ||
+            jas_image_cmptheight( gs.altimage, cmptlut[i] ) != height)
+            return false;
+    } // for
+
+    if( !qti.create( jas_image_width( gs.altimage ),
+                     jas_image_height( gs.altimage ), 32 ) )
+        return false;
+
+    uint32_t* data = (uint32_t*)qti.bits();
+
+    for( int y = 0; y < height; ++y ) {
+        for( int x = 0; x < width; ++x ) {
+            for( int k = 0; k < 3; ++k ) {
+                v[k] = jas_image_readcmptsample( gs.altimage, cmptlut[k], x, y );
+                // if the precision of the component is too small, increase
+                // it to use the complete value range.
+                v[k] <<= 8 - jas_image_cmptprec( gs.altimage, cmptlut[k] );
+
+                if( v[k] < 0 ) v[k] = 0;
+                else if( v[k] > 255 ) v[k] = 255;
+            } // for k
+
+            *data++ = qRgb( v[0], v[1], v[2] );
+        } // for x
+    } // for y
+    return true;
+} // render_view
+
+
+KDE_EXPORT void
+kimgio_jp2_read( QImageIO* io )
+{
+	if( jas_init() ) return;
+
+	gs_t gs;
+	if( !(gs.image = read_image( io )) ) return;
+
+	if( !convert_colorspace( gs ) ) return;
+
+	QImage image;
+	render_view( gs, image );
+
+	if( gs.image ) jas_image_destroy( gs.image );
+	if( gs.altimage ) jas_image_destroy( gs.altimage );
+
+	io->setImage( image );
+	io->setStatus( 0 );
+} // kimgio_jp2_read
+
+
+static jas_image_t*
+create_image( const QImage& qi )
+{
+    // prepare the component parameters
+    jas_image_cmptparm_t* cmptparms = new jas_image_cmptparm_t[ 3 ];
+
+    for ( int i = 0; i < 3; ++i ) {
+        // x and y offset
+        cmptparms[i].tlx = 0;
+        cmptparms[i].tly = 0;
+
+        // the resulting image will be hstep*width x vstep*height !
+        cmptparms[i].hstep = 1;
+        cmptparms[i].vstep = 1;
+        cmptparms[i].width = qi.width();
+        cmptparms[i].height = qi.height();
+
+        // we write everything as 24bit truecolor ATM
+        cmptparms[i].prec = 8;
+        cmptparms[i].sgnd = false;
+    }
+
+    jas_image_t* ji = jas_image_create( 3 /* number components */, cmptparms, JAS_CLRSPC_UNKNOWN );
+    delete[] cmptparms;
+
+    // returning 0 is ok
+    return ji;
+} // create_image
+
+
+static bool
+write_components( jas_image_t* ji, const QImage& qi )
+{
+    const unsigned height = qi.height();
+    const unsigned width = qi.width();
+
+    jas_matrix_t* m = jas_matrix_create( height, width );
+    if( !m ) return false;
+
+    jas_image_setclrspc( ji, JAS_CLRSPC_SRGB );
+
+    jas_image_setcmpttype( ji, 0, JAS_IMAGE_CT_RGB_R );
+    for( uint y = 0; y < height; ++y )
+        for( uint x = 0; x < width; ++x )
+            jas_matrix_set( m, y, x, qRed( qi.pixel( x, y ) ) );
+    jas_image_writecmpt( ji, 0, 0, 0, width, height, m );
+
+    jas_image_setcmpttype( ji, 1, JAS_IMAGE_CT_RGB_G );
+    for( uint y = 0; y < height; ++y )
+        for( uint x = 0; x < width; ++x )
+            jas_matrix_set( m, y, x, qGreen( qi.pixel( x, y ) ) );
+    jas_image_writecmpt( ji, 1, 0, 0, width, height, m );
+
+    jas_image_setcmpttype( ji, 2, JAS_IMAGE_CT_RGB_B );
+    for( uint y = 0; y < height; ++y )
+        for( uint x = 0; x < width; ++x )
+            jas_matrix_set( m, y, x, qBlue( qi.pixel( x, y ) ) );
+    jas_image_writecmpt( ji, 2, 0, 0, width, height, m );
+    jas_matrix_destroy( m );
+
+    return true;
+} // write_components
+
+KDE_EXPORT void
+kimgio_jp2_write( QImageIO* io )
+{
+	if( jas_init() ) return;
+
+	// open the stream. we write directly to the file if possible, to a
+	// temporary file otherwise.
+	jas_stream_t* stream = 0;
+
+	QFile* qf = 0;
+	KTempFile* ktempf = 0;
+	if( ( qf = dynamic_cast<QFile*>( io->ioDevice() ) ) ) {
+		// jas_stream_fdopen works here, but not when reading...
+		stream = jas_stream_fdopen( dup( qf->handle() ), "w" );
+	} else {
+		ktempf = new KTempFile;
+		ktempf->setAutoDelete( true );
+		stream = jas_stream_fdopen( dup( ktempf->handle()), "w" );
+	} // else
+
+
+	// by here, a jas_stream_t is open
+	if( !stream ) return;
+
+	jas_image_t* ji = create_image( io->image() );
+	if( !ji ) {
+		delete ktempf;
+		jas_stream_close( stream );
+		return;
+	} // if
+
+	if( !write_components( ji, io->image() ) ) {
+		delete ktempf;
+		jas_stream_close( stream );
+		jas_image_destroy( ji );
+		return;
+	} // if
+
+	// optstr:
+	// - rate=#B => the resulting file size is about # bytes
+	// - rate=0.0 .. 1.0 => the resulting file size is about the factor times
+	//                      the uncompressed size
+	QString rate;
+	QTextStream ts( &rate, IO_WriteOnly );
+	ts << "rate="
+		<< ( (io->quality() < 0) ? DEFAULT_RATE : io->quality() / 100.0F );
+	int i = jp2_encode( ji, stream, rate.utf8().data() );
+
+	jas_image_destroy( ji );
+	jas_stream_close( stream );
+
+	if( i != 0 ) { delete ktempf; return; }
+
+	if( ktempf ) {
+		// We've written to a tempfile. Copy the data to the final destination.
+		QFile* in = ktempf->file();
+
+		QByteArray b( 4096 );
+		Q_LONG size;
+
+		// seek to the beginning of the file.
+		if( !in->at( 0 ) ) { delete ktempf; return; }
+
+		// 0 or -1 is EOF / error
+		while( ( size = in->readBlock( b.data(), 4096 ) ) > 0 ) {
+			if( ( io->ioDevice()->writeBlock( b.data(), size ) ) == -1 ) {
+				delete ktempf;
+				return;
+			} // if
+		} // while
+		io->ioDevice()->flush();
+		delete ktempf;
+
+		// see if we've left the while loop due to an error.
+		if( size == -1 ) return;
+	} // if
+
+
+	// everything went fine
+	io->setStatus( IO_Ok );
+} // kimgio_jp2_write
+
+#endif // HAVE_JASPER
+