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kaklik |
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#include <QtGui/QMouseEvent> |
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#include "videoWidget.hh" |
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using namespace mimas; |
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VideoWidget::VideoWidget( QWidget *parent, Qt::WFlags ): |
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QGLWidget( parent ), offsetX(0), offsetY(0), zoom(1.0) |
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{ |
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} |
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void VideoWidget::setImage( const image< rgba< unsigned char > > &_img ) |
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{ |
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setImage( 0,0, _img.getWidth(), _img.getHeight(), _img ); |
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} |
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void VideoWidget::setImage( int _offsetX, int _offsetY, |
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int _width, int _height, |
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const image< rgba< unsigned char > > &_img ) |
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{ |
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offsetX = _offsetX; |
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offsetY = _offsetY; |
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img = _img; |
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adaptSize( _width, _height ); |
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update(); |
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} |
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void VideoWidget::wheelEvent( QWheelEvent *e ) |
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{ |
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zoom += e->delta() / 1200.0; |
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if ( zoom < 0.1 ) zoom = 0.1; |
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if ( zoom > 2.5 ) zoom = 2.5; |
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adaptSize( img.getWidth(), img.getHeight() ); |
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update(); |
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} |
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void VideoWidget::initializeGL(void) |
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{ |
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qglClearColor( QColor( 32, 32, 32 ) ); |
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} |
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void VideoWidget::resizeGL( int w, int h ) |
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{ |
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glViewport( 0, 0, (GLint)w, (GLint)h ); |
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glMatrixMode( GL_PROJECTION ); |
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glLoadIdentity(); |
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glOrtho( 0, width(), height(), 0, -1, 1 ); |
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glMatrixMode( GL_MODELVIEW ); |
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} |
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void VideoWidget::paintGL(void) |
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{ |
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glClear( GL_COLOR_BUFFER_BIT ); |
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if ( img.initialised() ) { |
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glPixelStorei( GL_UNPACK_ALIGNMENT, 1 ); |
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// glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 ); |
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// glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 ); |
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// glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 ); |
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glRasterPos2f( offsetX * zoom, offsetY * zoom ); |
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glPixelZoom( zoom, -zoom ); |
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// Direct access to image-memory! |
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glDrawPixels( img.getWidth(), img.getHeight(), |
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GL_BGRA, GL_UNSIGNED_BYTE, img.rawData() ); |
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}; |
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}; |
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void VideoWidget::adaptSize( int w, int h ) |
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{ |
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int |
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newW = (int)( w * zoom ), |
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newH = (int)( h * zoom ); |
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if ( width() != newW || height() != newH ) { |
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resize( newW, newH ); |
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}; |
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} |