void MirrorItem::paint(QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * /*widget*/)
{
// TODO: real HQ rendering, skipping the pixmap (better result)!
// generate Reflection pixmap, if needed
if (m_dirty || m_pixmap.isNull() || RenderOpts::HQRendering) {
// change pixmap size to match the bounding rect
if (m_pixmap.size() != m_boundingRect.size().toSize())
m_pixmap = QPixmap(m_boundingRect.width(), m_boundingRect.height());
// clear pixmap
m_pixmap.fill(Qt::transparent);
// find out the Transform chain to mirror a rotated item
QRectF sceneRectF = m_source->mapToScene(m_source->boundingRect()).boundingRect();
QTransform tFromItem = m_source->transform() * QTransform(1, 0, 0, 1, m_source->pos().x(), m_source->pos().y());
QTransform tFromPixmap = QTransform(1, 0, 0, -1.0, sceneRectF.left(), sceneRectF.bottom());
QTransform tItemToPixmap = tFromItem * tFromPixmap.inverted();
// draw the transformed item onto the pixmap
QPainter p(&m_pixmap);
p.setRenderHint(QPainter::Antialiasing, true);
p.setTransform(tItemToPixmap, true);
m_source->paint(&p, 0, 0);
p.end();
// add a linear alpha channel to the image
QPixmap alphaPixmap(m_pixmap.size());
QPainter alphaPainter(&alphaPixmap);
QLinearGradient alphaGradient(0, 0, 0, alphaPixmap.height());
alphaGradient.setColorAt(0.0 , QColor(128, 128, 128));
alphaGradient.setColorAt(0.50, QColor( 32, 32, 32));
alphaGradient.setColorAt(1.0 , QColor( 0, 0, 0));
alphaPainter.fillRect(alphaPixmap.rect(), alphaGradient);
alphaPainter.end();
m_pixmap.setAlphaChannel(alphaPixmap);
// reset dirty
m_dirty = false;
}
// draw the reflection pixmap
if (!option)
painter->drawPixmap(0, 0, m_pixmap);
else
painter->drawPixmap(option->rect, m_pixmap, option->rect);
}
void Carton::paintFaceReflectionTexture(QPainter *painter, Faces face)
{
if (m_specularityValue <= 0)
return;
const Faces emittingFace =
face == FrontReflection?Front
:face == BackReflection?Back
:face == LeftReflection?Left
:/* face == RightReflection? */Right;
const QSizeF faceSize(this->faceSize(face));
const qreal faceWith = faceSize.width();
const qreal faceHeight = faceSize.height();
const qreal reflectionHeight = faceHeight/100 * m_specularityValue;
const qreal remainingFaceHeight = faceHeight - reflectionHeight;
QImage blendImage(QSizeF(faceWith, reflectionHeight).toSize(), QImage::Format_ARGB32);
QPainter blendPainter(&blendImage);
blendPainter.translate(0, -remainingFaceHeight);
paintFaceTexture(&blendPainter, emittingFace);
blendPainter.end();
QImage alphaImage(QSizeF(faceWith, reflectionHeight).toSize(), QImage::Format_ARGB32);
QPainter alphaPainter(&alphaImage);
QLinearGradient alphaGradient(0, 0, 0, faceHeight);
alphaGradient.setColorAt(0, Qt::black);
alphaGradient.setColorAt(1, Qt::lightGray);
alphaPainter.setPen(Qt::NoPen);
alphaPainter.fillRect(QRectF(0, 0, faceWith, reflectionHeight), alphaGradient);
blendImage.setAlphaChannel(alphaImage);
alphaPainter.end();
painter->save();
painter->drawImage(0, int(remainingFaceHeight), blendImage);
painter->restore();
}
