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 <QtGui/QTextCursor>
  32 #include <QtGui/QStyleOptionGraphicsItem>
  33
  34 #include <QtCore/QString>
  35
  36 #include <QtXml/QDomElement>
  37 #include <QtCore/QRectF>
  38 #include <QtGui/QColor>
  39 #include <QtGui/QWidget>
  40 #include <framework/mlt_log.h>
  41
  42 static QApplication *app = NULL;
  43
  44 class ImageItem: public QGraphicsRectItem
  45 {
  46 public:
  47     ImageItem(QImage img)
  48     {
  49         m_img = img;
  50     }
  51     QImage m_img;
  52
  53
  54 protected:
  55 virtual void paint( QPainter *painter,
  56                        const QStyleOptionGraphicsItem * /*option*/,
  57                        QWidget* )
  58 {
  59     painter->setRenderHint(QPainter::SmoothPixmapTransform, true);
  60     painter->drawImage(QPoint(), m_img);
  61 }
  62 };
  63
  64
  65 QString rectTransform( QString s, QTransform t )
  66 {
  67         QStringList l = s.split( ',' );
  68         return QString::number(l.at(0).toDouble() * t.m11()) + ',' + QString::number(l.at(1).toDouble() * t.m22()) + ',' + QString::number(l.at(2).toDouble() * t.m11()) + ',' + QString::number(l.at(3).toDouble() * t.m22());
  69 }
  70
  71 QString colorToString( const QColor& c )
  72 {
  73         QString ret = "%1,%2,%3,%4";
  74         ret = ret.arg( c.red() ).arg( c.green() ).arg( c.blue() ).arg( c.alpha() );
  75         return ret;
  76 }
  77
  78 QString rectFToString( const QRectF& c )
  79 {
  80         QString ret = "%1,%2,%3,%4";
  81         ret = ret.arg( c.top() ).arg( c.left() ).arg( c.width() ).arg( c.height() );
  82         return ret;
  83 }
  84
  85 QRectF stringToRect( const QString & s )
  86 {
  87
  88         QStringList l = s.split( ',' );
  89         if ( l.size() < 4 )
  90                 return QRectF();
  91         return QRectF( l.at( 0 ).toDouble(), l.at( 1 ).toDouble(), l.at( 2 ).toDouble(), l.at( 3 ).toDouble() ).normalized();
  92 }
  93
  94 QColor stringToColor( const QString & s )
  95 {
  96         QStringList l = s.split( ',' );
  97         if ( l.size() < 4 )
  98                 return QColor();
  99         return QColor( l.at( 0 ).toInt(), l.at( 1 ).toInt(), l.at( 2 ).toInt(), l.at( 3 ).toInt() );
 100         ;
 101 }
 102 QTransform stringToTransform( const QString& s )
 103 {
 104         QStringList l = s.split( ',' );
 105         if ( l.size() < 9 )
 106                 return QTransform();
 107         return QTransform(
 108                    l.at( 0 ).toDouble(), l.at( 1 ).toDouble(), l.at( 2 ).toDouble(),
 109                    l.at( 3 ).toDouble(), l.at( 4 ).toDouble(), l.at( 5 ).toDouble(),
 110                    l.at( 6 ).toDouble(), l.at( 7 ).toDouble(), l.at( 8 ).toDouble()
 111                );
 112 }
 113
 114 static void qscene_delete( void *data )
 115 {
 116         QGraphicsScene *scene = ( QGraphicsScene * )data;
 117         if (scene) delete scene;
 118         scene = NULL;
 119 }
 120
 121
 122 void loadFromXml( mlt_producer producer, QGraphicsScene *scene, const char *templateXml, const char *templateText )
 123 {
 124         scene->clear();
 125         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 126         QDomDocument doc;
 127         QString data = QString::fromUtf8(templateXml);
 128         QString replacementText = QString::fromUtf8(templateText);
 129         doc.setContent(data);
 130         QDomElement title = doc.documentElement();
 131
 132         // Check for invalid title
 133         if ( title.isNull() || title.tagName() != "kdenlivetitle" ) return;
 134
 135         QTransform transform;
 136         if ( title.hasAttribute("width") ) {
 137             int originalWidth = title.attribute("width").toInt();
 138             mlt_properties_set_int( producer_props, "_original_width", originalWidth );
 139             int originalHeight = title.attribute("height").toInt();
 140             mlt_properties_set_int( producer_props, "_original_height", originalHeight );
 141             scene->setSceneRect(0, 0, originalWidth, originalHeight);
 142         }
 143
 144         QDomNodeList items = title.elementsByTagName("item");
 145         for ( int i = 0; i < items.count(); i++ )
 146         {
 147                 QGraphicsItem *gitem = NULL;
 148                 int zValue = items.item( i ).attributes().namedItem( "z-index" ).nodeValue().toInt();
 149                 if ( zValue > -1000 )
 150                 {
 151                         if ( items.item( i ).attributes().namedItem( "type" ).nodeValue() == "QGraphicsTextItem" )
 152                         {
 153                                 QDomNamedNodeMap txtProperties = items.item( i ).namedItem( "content" ).attributes();
 154                                 QFont font( txtProperties.namedItem( "font" ).nodeValue() );
 155                                         QDomNode node = txtProperties.namedItem( "font-bold" );
 156                                 if ( !node.isNull() )
 157                                 {
 158                                 // Old: Bold/Not bold.
 159                                         font.setBold( node.nodeValue().toInt() );
 160                                 }
 161                                 else
 162                                 {
 163                                         // New: Font weight (QFont::)
 164                                         font.setWeight( txtProperties.namedItem( "font-weight" ).nodeValue().toInt() );
 165                                 }
 166                                         font.setItalic( txtProperties.namedItem( "font-italic" ).nodeValue().toInt() );
 167                                 font.setUnderline( txtProperties.namedItem( "font-underline" ).nodeValue().toInt() );
 168                                 // Older Kdenlive version did not store pixel size but point size
 169                                 if ( txtProperties.namedItem( "font-pixel-size" ).isNull() )
 170                                 {
 171                                         QFont f2;
 172                                         f2.setPointSize( txtProperties.namedItem( "font-size" ).nodeValue().toInt() );
 173                                         font.setPixelSize( QFontInfo( f2 ).pixelSize() );
 174                                 }
 175                                 else
 176                                         font.setPixelSize( txtProperties.namedItem( "font-pixel-size" ).nodeValue().toInt() );
 177                                 QColor col( stringToColor( txtProperties.namedItem( "font-color" ).nodeValue() ) );
 178                                 QString text = items.item( i ).namedItem( "content" ).firstChild().nodeValue();
 179                                 if ( !replacementText.isEmpty() )
 180                                 {
 181                                         text = text.replace( "%s", replacementText );
 182                                 }
 183                                 QGraphicsTextItem *txt = scene->addText(text, font);
 184                                 txt->setDefaultTextColor( col );
 185                                 if ( txtProperties.namedItem( "alignment" ).isNull() == false )
 186                                 {
 187                                         txt->setTextWidth( txt->boundingRect().width() );
 188                                         QTextCursor cur = txt->textCursor();
 189                                         QTextBlockFormat format = cur.blockFormat();
 190                                         format.setAlignment(( Qt::Alignment ) txtProperties.namedItem( "alignment" ).nodeValue().toInt() );
 191                                         cur.select( QTextCursor::Document );
 192                                         cur.setBlockFormat( format );
 193                                         txt->setTextCursor( cur );
 194                                         cur.clearSelection();
 195                                         txt->setTextCursor( cur );
 196                                 }
 197                                         if ( !txtProperties.namedItem( "kdenlive-axis-x-inverted" ).isNull() )
 198                                 {
 199                                         //txt->setData(OriginXLeft, txtProperties.namedItem("kdenlive-axis-x-inverted").nodeValue().toInt());
 200                                 }
 201                                 if ( !txtProperties.namedItem( "kdenlive-axis-y-inverted" ).isNull() )
 202                                 {
 203                                         //txt->setData(OriginYTop, txtProperties.namedItem("kdenlive-axis-y-inverted").nodeValue().toInt());
 204                                 }
 205                                         gitem = txt;
 206                         }
 207                         else if ( items.item( i ).attributes().namedItem( "type" ).nodeValue() == "QGraphicsRectItem" )
 208                         {
 209                                 QString rect = items.item( i ).namedItem( "content" ).attributes().namedItem( "rect" ).nodeValue();
 210                                 QString br_str = items.item( i ).namedItem( "content" ).attributes().namedItem( "brushcolor" ).nodeValue();
 211                                 QString pen_str = items.item( i ).namedItem( "content" ).attributes().namedItem( "pencolor" ).nodeValue();
 212                                 double penwidth = items.item( i ).namedItem( "content" ).attributes().namedItem( "penwidth") .nodeValue().toDouble();
 213                                 QGraphicsRectItem *rec = scene->addRect( stringToRect( rect ), QPen( QBrush( stringToColor( pen_str ) ), penwidth ), QBrush( stringToColor( br_str ) ) );
 214                                 gitem = rec;
 215                         }
 216                         else if ( items.item( i ).attributes().namedItem( "type" ).nodeValue() == "QGraphicsPixmapItem" )
 217                         {
 218                                 const QString url = items.item( i ).namedItem( "content" ).attributes().namedItem( "url" ).nodeValue();
 219                                 QImage img( url );
 220                                 ImageItem *rec = new ImageItem(img);
 221                                 scene->addItem( rec );
 222                                 gitem = rec;
 223                         }
 224                         else if ( items.item( i ).attributes().namedItem( "type" ).nodeValue() == "QGraphicsSvgItem" )
 225                         {
 226                                 const QString url = items.item( i ).namedItem( "content" ).attributes().namedItem( "url" ).nodeValue();
 227                                 QGraphicsSvgItem *rec = new QGraphicsSvgItem(url);
 228                                 scene->addItem(rec);
 229                                 gitem = rec;
 230                         }
 231                 }
 232                 //pos and transform
 233                 if ( gitem )
 234                 {
 235                         QPointF p( items.item( i ).namedItem( "position" ).attributes().namedItem( "x" ).nodeValue().toDouble(),
 236                                    items.item( i ).namedItem( "position" ).attributes().namedItem( "y" ).nodeValue().toDouble() );
 237                         gitem->setPos( p );
 238                         gitem->setTransform( stringToTransform( items.item( i ).namedItem( "position" ).firstChild().firstChild().nodeValue() ) );
 239                         int zValue = items.item( i ).attributes().namedItem( "z-index" ).nodeValue().toInt();
 240                         gitem->setZValue( zValue );
 241                 }
 242         }
 243
 244         QDomNode n = doc.documentElement().firstChildElement("background");
 245         if (!n.isNull()) {
 246                 QColor color = QColor( stringToColor( n.attributes().namedItem( "color" ).nodeValue() ) );
 247                 if (color.alpha() > 0) {
 248                         QGraphicsRectItem *rec = scene->addRect(0, 0, scene->width(), scene->height() , QPen( Qt::NoPen ), QBrush( color ) );
 249                         rec->setZValue(-1100);
 250                 }
 251
 252         }
 253
 254         QString startRect;
 255         n = doc.documentElement().firstChildElement( "startviewport" );
 256         if (!n.isNull())
 257         {
 258                 startRect = n.attributes().namedItem( "rect" ).nodeValue();
 259         }
 260         n = doc.documentElement().firstChildElement( "endviewport" );
 261         if (!n.isNull())
 262         {
 263                 QString rect = n.attributes().namedItem( "rect" ).nodeValue();
 264                 if (startRect != rect)
 265                         mlt_properties_set( producer_props, "_endrect", rect.toUtf8().data() );
 266         }
 267         if (!startRect.isEmpty()) {
 268                 mlt_properties_set( producer_props, "_startrect", startRect.toUtf8().data() );
 269         }
 270         return;
 271 }
 272
 273
 274 void drawKdenliveTitle( producer_ktitle self, mlt_frame frame, int width, int height, double position, int force_refresh )
 275 {
 276         // Obtain the producer
 277         mlt_producer producer = &self->parent;
 278         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 279
 280         // Obtain properties of frame
 281         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 282
 283         pthread_mutex_lock( &self->mutex );
 284
 285         // Check if user wants us to reload the image
 286         if ( force_refresh == 1 || width != self->current_width || height != self->current_height || mlt_properties_get( producer_props, "_endrect" ) != NULL )
 287         {
 288                 //mlt_cache_item_close( self->image_cache );
 289                 self->current_image = NULL;
 290                 mlt_properties_set_data( producer_props, "cached_image", NULL, 0, NULL, NULL );
 291                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 292         }
 293
 294         if (self->current_image == NULL) {
 295                 // restore QGraphicsScene
 296                 QGraphicsScene *scene = static_cast<QGraphicsScene *> (mlt_properties_get_data( producer_props, "qscene", NULL ));
 297
 298                 if ( force_refresh == 1 && scene )
 299                 {
 300                         scene = NULL;
 301                         mlt_properties_set_data( producer_props, "qscene", NULL, 0, NULL, NULL );
 302                 }
 303
 304                 if ( scene == NULL )
 305                 {
 306                         int argc = 1;
 307                         char* argv[1];
 308                         argv[0] = (char*) "xxx";
 309
 310                         // Warning: all Qt graphic objects (QRect, ...) must be initialized AFTER
 311                         // the QApplication is created, otherwise their will be NULL
 312
 313                         if (qApp) {
 314                                 app = qApp;
 315                         }
 316                         else {
 317 #ifdef linux
 318                                 if ( getenv("DISPLAY") == 0 )
 319                                 {
 320                                         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" );
 321                                         pthread_mutex_unlock( &self->mutex );
 322                                         exit(1);
 323                                         return;
 324                                 }
 325 #endif
 326                                 app = new QApplication( argc, argv );
 327                         }
 328                         scene = new QGraphicsScene();
 329                         loadFromXml( producer, scene, mlt_properties_get( producer_props, "xmldata" ), mlt_properties_get( producer_props, "templatetext" ) );
 330                         mlt_properties_set_data( producer_props, "qscene", scene, 0, ( mlt_destructor )qscene_delete, NULL );
 331                 }
 332
 333                 QRectF start = stringToRect( QString( mlt_properties_get( producer_props, "_startrect" ) ) );
 334                 QRectF end = stringToRect( QString( mlt_properties_get( producer_props, "_endrect" ) ) );
 335
 336                 int originalWidth = mlt_properties_get_int( producer_props, "_original_width" );
 337                 int originalHeight= mlt_properties_get_int( producer_props, "_original_height" );
 338                 const QRectF source( 0, 0, width, height );
 339                 if (start.isNull()) {
 340                     start = QRectF( 0, 0, originalWidth, originalHeight );
 341                 }
 342
 343                 //must be extracted from kdenlive title
 344                 QImage img( width, height, QImage::Format_ARGB32 );
 345                 img.fill( 0 );
 346                 QPainter p1;
 347                 p1.begin( &img );
 348                 p1.setRenderHints( QPainter::Antialiasing | QPainter::TextAntialiasing | QPainter::HighQualityAntialiasing );
 349                 //| QPainter::SmoothPixmapTransform );
 350                 if (end.isNull())
 351                 {
 352                         scene->render( &p1, source, start, Qt::IgnoreAspectRatio );
 353                 }
 354                 else
 355                 {
 356                         QPointF topleft = start.topLeft() + ( end.topLeft() - start.topLeft() ) * position;
 357                         QPointF bottomRight = start.bottomRight() + ( end.bottomRight() - start.bottomRight() ) * position;
 358                         const QRectF r1( topleft, bottomRight );
 359                         scene->render( &p1, source, r1, Qt::IgnoreAspectRatio );
 360                 }
 361                 p1.end();
 362
 363                 int size = width * height * 4;
 364                 uint8_t *pointer=img.bits();
 365                 QRgb* src = ( QRgb* ) pointer;
 366                 self->current_image = ( uint8_t * )mlt_pool_alloc( size );
 367                 uint8_t *dst = self->current_image;
 368
 369                 for ( int i = 0; i < width * height * 4; i += 4 )
 370                 {
 371                         *dst++=qRed( *src );
 372                         *dst++=qGreen( *src );
 373                         *dst++=qBlue( *src );
 374                         *dst++=qAlpha( *src );
 375                         src++;
 376                 }
 377
 378                 mlt_properties_set_data( producer_props, "cached_image", self->current_image, size, mlt_pool_release, NULL );
 379                 self->current_width = width;
 380                 self->current_height = height;
 381         }
 382
 383         pthread_mutex_unlock( &self->mutex );
 384         mlt_properties_set_int( properties, "width", self->current_width );
 385         mlt_properties_set_int( properties, "height", self->current_height );
 386 }
 387
 388