From kde-kimageshop  Wed Oct 08 23:13:11 2003
From: Patrick Julien <freak () codepimps ! org>
Date: Wed, 08 Oct 2003 23:13:11 +0000
To: kde-kimageshop
Subject: Re: Bwerk!
X-MARC-Message: https://marc.info/?l=kde-kimageshop&m=106566243313232

On October 8, 2003 05:04 pm, Boudewijn Rempt wrote:
> I managed to mess things up good and well...
>
> I added the following to kis_painter, knowing full well I wasn't supposed
> to mess about with QPixmaps, but still doing so for the sake of quick
> results:
>
>

The raw tile stuff is actually 2 coordinates, not 1 coordinate and a size.

> void KisPainter::drawPolyline(const QPointArray& polyline)
> {
>     QRect r = polyline.boundingRect();
>     r = r.normalize();
>
>     KisTileMgrSP tileMgr =  m_device -> data();
>     // Let's hope that PJ counts from left-top to right-bottom, too,
>     KisPixelDataSP pixels = tileMgr->pixelData( r.left(),
>                                                r.top(),
>                                                r.right(),
>                                                r.bottom(),
>                                                TILEMODE_RW );
>
>     QImage image = QImage(  ( int ) pixels->data,
>                             r.width(),
>                             r.height(),
>                             tileMgr->depth() );
>
>     QPixmap buffer = QPixmap( image );
>     QPainter p;
>     p.begin(&buffer);
>     p.drawPolyline( polyline );
>     p.end();
>
>     tileMgr->writePixelData( pixels ); // memcpy to destination
>     tileMgr->releasePixelData( pixels ); // Is this necessary?
>
>     m_device->invalidate( r ); // And this?
> }
>
> And then I called that like this:
>
> void KisToolBrush2::mouseMove(QMouseEvent *e)
> {
>     if ( m_mousePressed ) {
>         m_polyline[2] = m_polyline[1];
>         m_polyline[1] = m_polyline[0];
>         m_polyline[0] = e->pos();
>
>         QRect r = m_polyline.boundingRect();
>         r = r.normalize();
>
>
>         KisImageSP img = m_view -> currentImg();
>         if (img) {
>             KisPaintDeviceSP device = img -> activeDevice();
>             if (device) {
>                 KisPainter p;
>                 p.begin(device);
>                 p.drawPolyline( m_polyline );
>                 p.end();
>
>                 //m_doc -> addCommand(new Brush2Cmd(img));
>                 device->anchor();
>             }
>
>         }
>         img -> invalidate(r);
>         m_view -> updateCanvas(r);
>     }
>
> And now Krita crashes in drawPolyline, giving me the distinc impression I
> should finish reading Accelerated C++ as soon as possible... Back to comfy
> chair and the meditative pipe for now.

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