git.sesse.net Git - mlt/blob - src/modules/qt/kdenlivetitle_wrapper.cpp

   1 /*
   2  * kdenlivetitle_wrapper.cpp -- kdenlivetitle wrapper
   3  * Copyright (c) 2009 Marco Gittler <g.marco@freenet.de>
   4  * Copyright (c) 2009 Jean-Baptiste Mardelle <jb@kdenlive.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20
  21 #include "kdenlivetitle_wrapper.h"
  22
  23 #include <QImage>
  24 #include <QPainter>
  25 #include <QDebug>
  26 #include <QApplication>
  27 #include <QMutex>
  28 #include <QGraphicsScene>
  29 #include <QGraphicsTextItem>
  30 #include <QGraphicsSvgItem>
  31 #include <QSvgRenderer>
  32 #include <QTextCursor>
  33 #include <QTextDocument>
  34 #include <QStyleOptionGraphicsItem>
  35
  36 #include <QString>
  37
  38 #include <QDomElement>
  39 #include <QRectF>
  40 #include <QColor>
  41 #include <QWidget>
  42 #include <framework/mlt_log.h>
  43
  44 #if QT_VERSION >= 0x040600
  45 #include <QGraphicsEffect>
  46 #include <QGraphicsBlurEffect>
  47 #include <QGraphicsDropShadowEffect>
  48 #endif
  49
  50 static QApplication *app = NULL;
  51 Q_DECLARE_METATYPE(QTextCursor);
  52
  53 class ImageItem: public QGraphicsItem
  54 {
  55 public:
  56     ImageItem(QImage img)
  57     {
  58         m_img = img;
  59     }
  60     QImage m_img;
  61
  62
  63 protected:
  64
  65 virtual QRectF boundingRect() const
  66 {
  67     return QRectF(0, 0, m_img.width(), m_img.height());
  68 }
  69
  70 virtual void paint( QPainter *painter,
  71                        const QStyleOptionGraphicsItem * /*option*/,
  72                        QWidget* )
  73 {
  74     painter->setRenderHint(QPainter::SmoothPixmapTransform, true);
  75     painter->drawImage(QPoint(), m_img);
  76 }
  77 };
  78
  79
  80 QRectF stringToRect( const QString & s )
  81 {
  82
  83         QStringList l = s.split( ',' );
  84         if ( l.size() < 4 )
  85                 return QRectF();
  86         return QRectF( l.at( 0 ).toDouble(), l.at( 1 ).toDouble(), l.at( 2 ).toDouble(), l.at( 3 ).toDouble() ).normalized();
  87 }
  88
  89 QColor stringToColor( const QString & s )
  90 {
  91         QStringList l = s.split( ',' );
  92         if ( l.size() < 4 )
  93                 return QColor();
  94         return QColor( l.at( 0 ).toInt(), l.at( 1 ).toInt(), l.at( 2 ).toInt(), l.at( 3 ).toInt() );
  95         ;
  96 }
  97 QTransform stringToTransform( const QString& s )
  98 {
  99         QStringList l = s.split( ',' );
 100         if ( l.size() < 9 )
 101                 return QTransform();
 102         return QTransform(
 103                    l.at( 0 ).toDouble(), l.at( 1 ).toDouble(), l.at( 2 ).toDouble(),
 104                    l.at( 3 ).toDouble(), l.at( 4 ).toDouble(), l.at( 5 ).toDouble(),
 105                    l.at( 6 ).toDouble(), l.at( 7 ).toDouble(), l.at( 8 ).toDouble()
 106                );
 107 }
 108
 109 static void qscene_delete( void *data )
 110 {
 111         QGraphicsScene *scene = ( QGraphicsScene * )data;
 112         if (scene) delete scene;
 113         scene = NULL;
 114 }
 115
 116
 117 void loadFromXml( mlt_producer producer, QGraphicsScene *scene, const char *templateXml, const char *templateText )
 118 {
 119         scene->clear();
 120         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 121         QDomDocument doc;
 122         QString data = QString::fromUtf8(templateXml);
 123         QString replacementText = QString::fromUtf8(templateText);
 124         doc.setContent(data);
 125         QDomElement title = doc.documentElement();
 126
 127         // Check for invalid title
 128         if ( title.isNull() || title.tagName() != "kdenlivetitle" ) return;
 129
 130         // Check title locale
 131         if ( title.hasAttribute( "LC_NUMERIC" ) ) {
 132             QString locale = title.attribute( "LC_NUMERIC" );
 133             QLocale::setDefault( locale );
 134         }
 135
 136         int originalWidth;
 137         int originalHeight;
 138         if ( title.hasAttribute("width") ) {
 139             originalWidth = title.attribute("width").toInt();
 140             originalHeight = title.attribute("height").toInt();
 141             scene->setSceneRect(0, 0, originalWidth, originalHeight);
 142         }
 143         else {
 144             originalWidth = scene->sceneRect().width();
 145             originalHeight = scene->sceneRect().height();
 146         }
 147         if ( title.hasAttribute( "out" ) ) {
 148             mlt_properties_set_position( producer_props, "_animation_out", title.attribute( "out" ).toDouble() );
 149         }
 150         else {
 151             mlt_properties_set_position( producer_props, "_animation_out", mlt_producer_get_out( producer ) );
 152         }
 153
 154         mlt_properties_set_int( producer_props, "_original_width", originalWidth );
 155         mlt_properties_set_int( producer_props, "_original_height", originalHeight );
 156
 157         QDomNode node;
 158         QDomNodeList items = title.elementsByTagName("item");
 159         for ( int i = 0; i < items.count(); i++ )
 160         {
 161                 QGraphicsItem *gitem = NULL;
 162                 node = items.item( i );
 163                 QDomNamedNodeMap nodeAttributes = node.attributes();
 164                 int zValue = nodeAttributes.namedItem( "z-index" ).nodeValue().toInt();
 165                 if ( zValue > -1000 )
 166                 {
 167                         if ( nodeAttributes.namedItem( "type" ).nodeValue() == "QGraphicsTextItem" )
 168                         {
 169                                 QDomNamedNodeMap txtProperties = node.namedItem( "content" ).attributes();
 170                                 QFont font( txtProperties.namedItem( "font" ).nodeValue() );
 171                                 QDomNode propsNode = txtProperties.namedItem( "font-bold" );
 172                                 if ( !propsNode.isNull() )
 173                                 {
 174                                         // Old: Bold/Not bold.
 175                                         font.setBold( propsNode.nodeValue().toInt() );
 176                                 }
 177                                 else
 178                                 {
 179                                         // New: Font weight (QFont::)
 180                                         font.setWeight( txtProperties.namedItem( "font-weight" ).nodeValue().toInt() );
 181                                 }
 182                                 font.setItalic( txtProperties.namedItem( "font-italic" ).nodeValue().toInt() );
 183                                 font.setUnderline( txtProperties.namedItem( "font-underline" ).nodeValue().toInt() );
 184                                 // Older Kdenlive version did not store pixel size but point size
 185                                 if ( txtProperties.namedItem( "font-pixel-size" ).isNull() )
 186                                 {
 187                                         QFont f2;
 188                                         f2.setPointSize( txtProperties.namedItem( "font-size" ).nodeValue().toInt() );
 189                                         font.setPixelSize( QFontInfo( f2 ).pixelSize() );
 190                                 }
 191                                 else
 192                                         font.setPixelSize( txtProperties.namedItem( "font-pixel-size" ).nodeValue().toInt() );
 193                                 QColor col( stringToColor( txtProperties.namedItem( "font-color" ).nodeValue() ) );
 194                                 QString text = node.namedItem( "content" ).firstChild().nodeValue();
 195                                 if ( !replacementText.isEmpty() )
 196                                 {
 197                                         text = text.replace( "%s", replacementText );
 198                                 }
 199                                 QGraphicsTextItem *txt = scene->addText(text, font);
 200                                 if (txtProperties.namedItem("font-outline").nodeValue().toDouble()>0.0){
 201                                         QTextDocument *doc = txt->document();
 202                                         // Make sure some that the text item does not request refresh by itself
 203                                         doc->blockSignals(true);
 204                                         QTextCursor cursor(doc);
 205                                         cursor.select(QTextCursor::Document);
 206                                         QTextCharFormat format;
 207                                         format.setTextOutline(
 208                                                         QPen(QColor( stringToColor( txtProperties.namedItem( "font-outline-color" ).nodeValue() ) ),
 209                                                         txtProperties.namedItem("font-outline").nodeValue().toDouble(),
 210                                                         Qt::SolidLine,Qt::RoundCap,Qt::RoundJoin)
 211                                         );
 212                                         format.setForeground(QBrush(col));
 213
 214                                         cursor.mergeCharFormat(format);
 215                                 } else {
 216                                         txt->setDefaultTextColor( col );
 217                                 }
 218
 219                                 // Effects
 220                                 if (!txtProperties.namedItem( "typewriter" ).isNull()) {
 221                                         // typewriter effect
 222                                         mlt_properties_set_int( producer_props, "_animated", 1 );
 223                                         QStringList effetData = QStringList() << "typewriter" << text << txtProperties.namedItem( "typewriter" ).nodeValue();
 224                                         txt->setData(0, effetData);
 225                                         if ( !txtProperties.namedItem( "textwidth" ).isNull() )
 226                                                 txt->setData( 1, txtProperties.namedItem( "textwidth" ).nodeValue() );
 227                                 }
 228
 229                                 if ( txtProperties.namedItem( "alignment" ).isNull() == false )
 230                                 {
 231                                         txt->setTextWidth( txt->boundingRect().width() );
 232                                         QTextOption opt = txt->document()->defaultTextOption ();
 233                                         opt.setAlignment(( Qt::Alignment ) txtProperties.namedItem( "alignment" ).nodeValue().toInt() );
 234                                         txt->document()->setDefaultTextOption (opt);
 235                                 }
 236                                         if ( !txtProperties.namedItem( "kdenlive-axis-x-inverted" ).isNull() )
 237                                 {
 238                                         //txt->setData(OriginXLeft, txtProperties.namedItem("kdenlive-axis-x-inverted").nodeValue().toInt());
 239                                 }
 240                                 if ( !txtProperties.namedItem( "kdenlive-axis-y-inverted" ).isNull() )
 241                                 {
 242                                         //txt->setData(OriginYTop, txtProperties.namedItem("kdenlive-axis-y-inverted").nodeValue().toInt());
 243                                 }
 244                                         gitem = txt;
 245                         }
 246                         else if ( nodeAttributes.namedItem( "type" ).nodeValue() == "QGraphicsRectItem" )
 247                         {
 248                                 QString rect = node.namedItem( "content" ).attributes().namedItem( "rect" ).nodeValue();
 249                                 QString br_str = node.namedItem( "content" ).attributes().namedItem( "brushcolor" ).nodeValue();
 250                                 QString pen_str = node.namedItem( "content" ).attributes().namedItem( "pencolor" ).nodeValue();
 251                                 double penwidth = node.namedItem( "content" ).attributes().namedItem( "penwidth") .nodeValue().toDouble();
 252                                 QGraphicsRectItem *rec = scene->addRect( stringToRect( rect ), QPen( QBrush( stringToColor( pen_str ) ), penwidth, Qt::SolidLine, Qt::SquareCap, Qt::RoundJoin ), QBrush( stringToColor( br_str ) ) );
 253                                 gitem = rec;
 254                         }
 255                         else if ( nodeAttributes.namedItem( "type" ).nodeValue() == "QGraphicsPixmapItem" )
 256                         {
 257                                 const QString url = node.namedItem( "content" ).attributes().namedItem( "url" ).nodeValue();
 258                                 const QString base64 = items.item(i).namedItem("content").attributes().namedItem("base64").nodeValue();
 259                                 QImage img;
 260                                 if (base64.isEmpty()){
 261                                         img.load(url);
 262                                 }else{
 263                                         img.loadFromData(QByteArray::fromBase64(base64.toLatin1()));
 264                                 }
 265                                 ImageItem *rec = new ImageItem(img);
 266                                 scene->addItem( rec );
 267                                 gitem = rec;
 268                         }
 269                         else if ( nodeAttributes.namedItem( "type" ).nodeValue() == "QGraphicsSvgItem" )
 270                         {
 271                                 QString url = items.item(i).namedItem("content").attributes().namedItem("url").nodeValue();
 272                                 QString base64 = items.item(i).namedItem("content").attributes().namedItem("base64").nodeValue();
 273                                 QGraphicsSvgItem *rec = NULL;
 274                                 if (base64.isEmpty()){
 275                                         rec = new QGraphicsSvgItem(url);
 276                                 }else{
 277                                         rec = new QGraphicsSvgItem();
 278                                         QSvgRenderer *renderer= new QSvgRenderer(QByteArray::fromBase64(base64.toLatin1()), rec );
 279                                         rec->setSharedRenderer(renderer);
 280                                 }
 281                                 if (rec){
 282                                         scene->addItem(rec);
 283                                         gitem = rec;
 284                                 }
 285                         }
 286                 }
 287                 //pos and transform
 288                 if ( gitem )
 289                 {
 290                         QPointF p( node.namedItem( "position" ).attributes().namedItem( "x" ).nodeValue().toDouble(),
 291                                    node.namedItem( "position" ).attributes().namedItem( "y" ).nodeValue().toDouble() );
 292                         gitem->setPos( p );
 293                         gitem->setTransform( stringToTransform( node.namedItem( "position" ).firstChild().firstChild().nodeValue() ) );
 294                         int zValue = nodeAttributes.namedItem( "z-index" ).nodeValue().toInt();
 295                         gitem->setZValue( zValue );
 296
 297 #if QT_VERSION >= 0x040600
 298                         // effects
 299                         QDomNode eff = items.item(i).namedItem("effect");
 300                         if (!eff.isNull()) {
 301                                 QDomElement e = eff.toElement();
 302                                 if (e.attribute("type") == "blur") {
 303                                         QGraphicsBlurEffect *blur = new QGraphicsBlurEffect();
 304                                         blur->setBlurRadius(e.attribute("blurradius").toInt());
 305                                         gitem->setGraphicsEffect(blur);
 306                                 }
 307                                 else if (e.attribute("type") == "shadow") {
 308                                         QGraphicsDropShadowEffect *shadow = new QGraphicsDropShadowEffect();
 309                                         shadow->setBlurRadius(e.attribute("blurradius").toInt());
 310                                         shadow->setOffset(e.attribute("xoffset").toInt(), e.attribute("yoffset").toInt());
 311                                         gitem->setGraphicsEffect(shadow);
 312                                 }
 313                         }
 314 #endif
 315                 }
 316         }
 317
 318         QDomNode n = title.firstChildElement("background");
 319         if (!n.isNull()) {
 320                 QColor color = QColor( stringToColor( n.attributes().namedItem( "color" ).nodeValue() ) );
 321                 if (color.alpha() > 0) {
 322                         QGraphicsRectItem *rec = scene->addRect(0, 0, scene->width(), scene->height() , QPen( Qt::NoPen ), QBrush( color ) );
 323                         rec->setZValue(-1100);
 324                 }
 325
 326         }
 327
 328         QString startRect;
 329         n = title.firstChildElement( "startviewport" );
 330         // Check if node exists, if it has an x attribute, it is an old version title, don't use viewport
 331         if (!n.isNull() && !n.toElement().hasAttribute("x"))
 332         {
 333                 startRect = n.attributes().namedItem( "rect" ).nodeValue();
 334         }
 335         n = title.firstChildElement( "endviewport" );
 336         // Check if node exists, if it has an x attribute, it is an old version title, don't use viewport
 337         if (!n.isNull() && !n.toElement().hasAttribute("x"))
 338         {
 339                 QString rect = n.attributes().namedItem( "rect" ).nodeValue();
 340                 if (startRect != rect)
 341                         mlt_properties_set( producer_props, "_endrect", rect.toUtf8().data() );
 342         }
 343         if (!startRect.isEmpty()) {
 344                 mlt_properties_set( producer_props, "_startrect", startRect.toUtf8().data() );
 345         }
 346         return;
 347 }
 348
 349
 350 void drawKdenliveTitle( producer_ktitle self, mlt_frame frame, int width, int height, double position, int force_refresh )
 351 {
 352         // Obtain the producer
 353         mlt_producer producer = &self->parent;
 354         mlt_profile profile = mlt_service_profile ( MLT_PRODUCER_SERVICE( producer ) ) ;
 355         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 356
 357         // Obtain properties of frame
 358         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 359
 360         pthread_mutex_lock( &self->mutex );
 361
 362         // Check if user wants us to reload the image
 363         if ( mlt_properties_get( producer_props, "_animated" ) != NULL || force_refresh == 1 || width != self->current_width || height != self->current_height || mlt_properties_get( producer_props, "_endrect" ) != NULL )
 364         {
 365                 //mlt_cache_item_close( self->image_cache );
 366                 self->current_image = NULL;
 367                 mlt_properties_set_data( producer_props, "cached_image", NULL, 0, NULL, NULL );
 368                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 369         }
 370
 371         if (self->current_image == NULL) {
 372                 // restore QGraphicsScene
 373                 QGraphicsScene *scene = static_cast<QGraphicsScene *> (mlt_properties_get_data( producer_props, "qscene", NULL ));
 374
 375                 if ( force_refresh == 1 && scene )
 376                 {
 377                         scene = NULL;
 378                         mlt_properties_set_data( producer_props, "qscene", NULL, 0, NULL, NULL );
 379                 }
 380
 381                 if ( scene == NULL )
 382                 {
 383                         int argc = 1;
 384                         char* argv[1];
 385                         argv[0] = (char*) "xxx";
 386
 387                         // Warning: all Qt graphic objects (QRect, ...) must be initialized AFTER
 388                         // the QApplication is created, otherwise their will be NULL
 389
 390                         if ( app == NULL ) {
 391                                 if ( qApp ) {
 392                                         app = qApp;
 393                                 }
 394                                 else {
 395 #ifdef linux
 396                                         if ( getenv("DISPLAY") == 0 )
 397                                         {
 398                                                 mlt_log_panic( MLT_PRODUCER_SERVICE( producer ), "Error, cannot render titles without an X11 environment.\nPlease either run melt from an X session or use a fake X server like xvfb:\nxvfb-run -a melt (...)\n" );
 399                                                 pthread_mutex_unlock( &self->mutex );
 400                                                 return;
 401                                         }
 402 #endif
 403                                         app = new QApplication( argc, argv );
 404                                         const char *localename = mlt_properties_get_lcnumeric( MLT_SERVICE_PROPERTIES( MLT_PRODUCER_SERVICE( producer ) ) );
 405                                         QLocale::setDefault( QLocale( localename ) );
 406                                 }
 407                                 qRegisterMetaType<QTextCursor>( "QTextCursor" );
 408                         }
 409                         scene = new QGraphicsScene();
 410                         scene->setItemIndexMethod( QGraphicsScene::NoIndex );
 411                         scene->setSceneRect(0, 0, mlt_properties_get_int( properties, "width" ), mlt_properties_get_int( properties, "height" ));
 412                         if ( mlt_properties_get( producer_props, "resource" ) && mlt_properties_get( producer_props, "resource" )[0] != '\0' )
 413                         {
 414                                 // The title has a resource property, so we read all properties from the resource.
 415                                 // Do not serialize the xmldata
 416                                 loadFromXml( producer, scene, mlt_properties_get( producer_props, "_xmldata" ), mlt_properties_get( producer_props, "templatetext" ) );
 417                         }
 418                         else
 419                         {
 420                                 // The title has no resource, all data should be serialized
 421                                 loadFromXml( producer, scene, mlt_properties_get( producer_props, "xmldata" ), mlt_properties_get( producer_props, "templatetext" ) );
 422
 423                         }
 424                         mlt_properties_set_data( producer_props, "qscene", scene, 0, ( mlt_destructor )qscene_delete, NULL );
 425                 }
 426
 427                 QRectF start = stringToRect( QString( mlt_properties_get( producer_props, "_startrect" ) ) );
 428                 QRectF end = stringToRect( QString( mlt_properties_get( producer_props, "_endrect" ) ) );
 429
 430                 int originalWidth = mlt_properties_get_int( producer_props, "_original_width" );
 431                 int originalHeight= mlt_properties_get_int( producer_props, "_original_height" );
 432                 const QRectF source( 0, 0, width, height );
 433                 if (start.isNull()) {
 434                     start = QRectF( 0, 0, originalWidth, originalHeight );
 435                 }
 436
 437                 // Effects
 438                 QList <QGraphicsItem *> items = scene->items();
 439                 QGraphicsTextItem *titem = NULL;
 440                 for (int i = 0; i < items.count(); i++) {
 441                     titem = static_cast <QGraphicsTextItem*> ( items.at( i ) );
 442                     if (titem && !titem->data( 0 ).isNull()) {
 443                             QStringList params = titem->data( 0 ).toStringList();
 444                             if (params.at( 0 ) == "typewriter" ) {
 445                                     // typewriter effect has 2 param values:
 446                                     // the keystroke delay and a start offset, both in frames
 447                                     QStringList values = params.at( 2 ).split( ";" );
 448                                     int interval = qMax( 0, ( ( int ) position - values.at( 1 ).toInt()) / values.at( 0 ).toInt() );
 449                                     QTextCursor cursor = titem->textCursor();
 450                                     cursor.movePosition(QTextCursor::EndOfBlock);
 451                                     // get the font format
 452                                     QTextCharFormat format = cursor.charFormat();
 453                                     cursor.select(QTextCursor::Document);
 454                                     QString txt = params.at( 1 ).left( interval );
 455                                     // If the string to insert is empty, insert a space / linebreak so that we don't loose
 456                                     // formatting infos for the next iterations
 457                                     int lines = params.at( 1 ).count( '\n' );
 458                                     QString empty = " ";
 459                                     for (int i = 0; i < lines; i++)
 460                                             empty.append( "\n " );
 461                                     cursor.insertText( txt.isEmpty() ? empty : txt, format );
 462                                     if ( !titem->data( 1 ).isNull() )
 463                                           titem->setTextWidth( titem->data( 1 ).toDouble() );
 464                             }
 465                     }
 466                 }
 467
 468                 //must be extracted from kdenlive title
 469                 QImage img( width, height, QImage::Format_ARGB32 );
 470                 img.fill( 0 );
 471                 QPainter p1;
 472                 p1.begin( &img );
 473                 p1.setRenderHints( QPainter::Antialiasing | QPainter::TextAntialiasing | QPainter::HighQualityAntialiasing );
 474                 //| QPainter::SmoothPixmapTransform );
 475                 mlt_position anim_out = mlt_properties_get_position( producer_props, "_animation_out" );
 476
 477                 if (end.isNull())
 478                 {
 479                         scene->render( &p1, source, start, Qt::IgnoreAspectRatio );
 480                 }
 481                 else if ( position > anim_out ) {
 482                         scene->render( &p1, source, end, Qt::IgnoreAspectRatio );
 483                 }
 484                 else {
 485                         double percentage = 0;
 486                         if ( position && anim_out )
 487                                 percentage = position / anim_out;
 488                         QPointF topleft = start.topLeft() + ( end.topLeft() - start.topLeft() ) * percentage;
 489                         QPointF bottomRight = start.bottomRight() + ( end.bottomRight() - start.bottomRight() ) * percentage;
 490                         const QRectF r1( topleft, bottomRight );
 491                         scene->render( &p1, source, r1, Qt::IgnoreAspectRatio );
 492                         if ( profile && !profile->progressive ){
 493                                 int line=0;
 494                                 double percentage_next_filed    = ( position + 0.5 ) / anim_out;
 495                                 QPointF topleft_next_field = start.topLeft() + ( end.topLeft() - start.topLeft() ) * percentage_next_filed;
 496                                 QPointF bottomRight_next_field = start.bottomRight() + ( end.bottomRight() - start.bottomRight() ) * percentage_next_filed;
 497                                 const QRectF r2( topleft_next_field, bottomRight_next_field );
 498                                 QImage img1( width, height, QImage::Format_ARGB32 );
 499                                 img1.fill( 0 );
 500                                 QPainter p2;
 501                                 p2.begin(&img1);
 502                                 p2.setRenderHints( QPainter::Antialiasing | QPainter::TextAntialiasing | QPainter::HighQualityAntialiasing );
 503                                 scene->render(&p2,source,r2,  Qt::IgnoreAspectRatio );
 504                                 p2.end();
 505                                 int next_field_line = (  mlt_properties_get_int( producer_props, "top_field_first" ) ? 1 : 0 );
 506                                 for (line = next_field_line ;line<height;line+=2){
 507                                                 memcpy(img.scanLine(line),img1.scanLine(line),img.bytesPerLine());
 508                                 }
 509
 510                         }
 511                 }
 512                 p1.end();
 513
 514                 int size = width * height * 4;
 515                 uint8_t *pointer=img.bits();
 516                 QRgb* src = ( QRgb* ) pointer;
 517                 self->current_image = ( uint8_t * )mlt_pool_alloc( size );
 518                 uint8_t *dst = self->current_image;
 519
 520                 for ( int i = 0; i < width * height * 4; i += 4 )
 521                 {
 522                         *dst++=qRed( *src );
 523                         *dst++=qGreen( *src );
 524                         *dst++=qBlue( *src );
 525                         *dst++=qAlpha( *src );
 526                         src++;
 527                 }
 528
 529                 mlt_properties_set_data( producer_props, "cached_image", self->current_image, size, mlt_pool_release, NULL );
 530                 self->current_width = width;
 531                 self->current_height = height;
 532         }
 533
 534         pthread_mutex_unlock( &self->mutex );
 535         mlt_properties_set_int( properties, "width", self->current_width );
 536         mlt_properties_set_int( properties, "height", self->current_height );
 537 }
 538
 539