void BrushPreview::updatePreview()
{
#ifndef DESIGNER_PLUGIN
if(!m_preview) {
m_preview = new paintcore::LayerStack;
m_previewCache = new paintcore::LayerStackPixmapCacheObserver(this);
m_previewCache->attachToLayerStack(m_preview);
}
auto layerstack = m_preview->editor(0);
if(m_preview->width() == 0) {
const QSize size = contentsRect().size();
layerstack.resize(0, size.width(), size.height(), 0);
layerstack.createLayer(0, 0, QColor(0,0,0), false, false, QString());
} else if(m_preview->width() != contentsRect().width() || m_preview->height() != contentsRect().height()) {
layerstack.resize(0, contentsRect().width() - m_preview->width(), contentsRect().height() - m_preview->height(), 0);
}
QRectF previewRect(
m_preview->width()/8,
m_preview->height()/4,
m_preview->width()-m_preview->width()/4,
m_preview->height()-m_preview->height()/2
);
paintcore::PointVector pointvector;
switch(_shape) {
case Stroke: pointvector = brushes::shapes::sampleStroke(previewRect); break;
case Line:
pointvector
<< paintcore::Point(previewRect.left(), previewRect.top(), 1.0)
<< paintcore::Point(previewRect.right(), previewRect.bottom(), 1.0);
break;
case Rectangle: pointvector = brushes::shapes::rectangle(previewRect); break;
case Ellipse: pointvector = brushes::shapes::ellipse(previewRect); break;
case FloodFill:
case FloodErase: pointvector = brushes::shapes::sampleBlob(previewRect); break;
}
QColor bgcolor = m_bg;
brushes::ClassicBrush brush = m_brush;
// Special handling for some blending modes
// TODO this could be implemented in some less ad-hoc way
if(brush.blendingMode() == paintcore::BlendMode::MODE_BEHIND) {
// "behind" mode needs a transparent layer for anything to show up
brush.setBlendingMode(paintcore::BlendMode::MODE_NORMAL);
} else if(brush.blendingMode() == paintcore::BlendMode::MODE_COLORERASE) {
// Color-erase mode: use fg color as background
bgcolor = m_color;
}
if(_shape == FloodFill) {
brush.setColor(bgcolor);
}
auto layer = layerstack.getEditableLayerByIndex(0);
layer.putTile(0, 0, 99999, isTransparentBackground() ? paintcore::Tile() : paintcore::Tile(bgcolor));
brushes::BrushEngine brushengine;
brushengine.setBrush(1, 1, brush);
for(int i=0;i<pointvector.size();++i)
brushengine.strokeTo(pointvector[i], layer.layer());
brushengine.endStroke();
const auto dabs = brushengine.takeDabs();
for(int i=0;i<dabs.size();++i)
brushes::drawBrushDabsDirect(*dabs.at(i), layer);
layer.mergeSublayer(1);
if(_shape == FloodFill || _shape == FloodErase) {
paintcore::FillResult fr = paintcore::floodfill(m_preview, previewRect.center().toPoint(), _shape == FloodFill ? m_color : QColor(), _fillTolerance, 0, false, 360000);
if(_fillExpansion>0)
fr = paintcore::expandFill(fr, _fillExpansion, m_color);
if(!fr.image.isNull())
layer.putImage(fr.x, fr.y, fr.image, _shape == FloodFill ? (_underFill ? paintcore::BlendMode::MODE_BEHIND : paintcore::BlendMode::MODE_NORMAL) : paintcore::BlendMode::MODE_ERASE);
}
m_needupdate=false;
#endif
}
void BrushPreview::updatePreview()
{
if(!m_preview) {
m_preview = new paintcore::LayerStack;
QSize size = contentsRect().size();
m_preview->resize(0, size.width(), size.height(), 0);
m_preview->createLayer(0, 0, QColor(0,0,0), false, false, QString());
} else if(m_preview->width() != contentsRect().width() || m_preview->height() != contentsRect().height()) {
m_preview->resize(0, contentsRect().width() - m_preview->width(), contentsRect().height() - m_preview->height(), 0);
}
QRectF previewRect(
m_preview->width()/8,
m_preview->height()/4,
m_preview->width()-m_preview->width()/4,
m_preview->height()-m_preview->height()/2
);
paintcore::PointVector pointvector;
switch(_shape) {
case Stroke: pointvector = paintcore::shapes::sampleStroke(previewRect); break;
case Line:
pointvector
<< paintcore::Point(previewRect.left(), previewRect.top(), 1.0)
<< paintcore::Point(previewRect.right(), previewRect.bottom(), 1.0);
break;
case Rectangle: pointvector = paintcore::shapes::rectangle(previewRect); break;
case Ellipse: pointvector = paintcore::shapes::ellipse(previewRect); break;
case FloodFill: pointvector = paintcore::shapes::sampleBlob(previewRect); break;
}
QColor bgcolor = m_bg;
paintcore::Brush brush = m_brush;
// Special handling for some blending modes
// TODO this could be implemented in some less ad-hoc way
if(brush.blendingMode() == 11) {
// "behind" mode needs a transparent layer for anything to show up
brush.setBlendingMode(paintcore::BlendMode::MODE_NORMAL);
} else if(brush.blendingMode() == 12) {
// Color-erase mode: use fg color as background
bgcolor = m_color;
}
if(_shape == FloodFill) {
brush.setColor(bgcolor);
}
paintcore::Layer *layer = m_preview->getLayerByIndex(0);
layer->fillRect(QRect(0, 0, layer->width(), layer->height()), isTransparentBackground() ? QColor(Qt::transparent) : bgcolor, paintcore::BlendMode::MODE_REPLACE);
paintcore::StrokeState ss(brush);
for(int i=1;i<pointvector.size();++i)
layer->drawLine(0, brush, pointvector[i-1], pointvector[i], ss);
layer->mergeSublayer(0);
if(_shape == FloodFill) {
paintcore::FillResult fr = paintcore::floodfill(m_preview, previewRect.center().toPoint(), m_color, _fillTolerance, 0, false);
if(_fillExpansion>0)
fr = paintcore::expandFill(fr, _fillExpansion, m_color);
layer->putImage(fr.x, fr.y, fr.image, _underFill ? paintcore::BlendMode::MODE_BEHIND : paintcore::BlendMode::MODE_NORMAL);
}
m_needupdate=false;
}
