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