/**
* @param from point from which the line begins
* @param to point at which the line ends
* @param brush brush to draw the line with
*/
void Preview::preview(const dpcore::Point& from, const dpcore::Point& to, const dpcore::Brush& brush)
{
brush_ = brush;
from_ = from;
to_ = to;
const int rad = brush.radius(to.pressure());
QColor color = brush.color(to.pressure());
QPen pen;
if(rad==0) {
pen.setWidth(1);
color.setAlphaF(brush.opacity(to.pressure()));
} else {
pen.setWidth(rad*2);
pen.setCapStyle(Qt::RoundCap);
pen.setJoinStyle(Qt::RoundJoin);
// Approximate brush transparency
const qreal a = brush.opacity(to.pressure()) * rad * (1-brush.spacing()/100.0);
color.setAlphaF(qMin(a, 1.0));
}
pen.setColor(color);
initAppearance(pen);
}
/**
* @param brush brush info to send
*/
void SessionState::sendToolSelect(const dpcore::Brush& brush)
{
host_->sendPacket( protocol::ToolSelect(
host_->localuser_,
brush.subpixel()?SUBPIXEL:0,
brush.blendingMode(),
encodeColor(brush.color(1), brush.opacity(1)),
encodeColor(brush.color(0), brush.opacity(0)),
brush.radius(1),
brush.radius(0),
qRound(brush.hardness(1)*255),
qRound(brush.hardness(0)*255),
brush.spacing()
)
);
}
protocol::MessagePtr brushToToolChange(int userid, int layer, const dpcore::Brush &brush)
{
uint8_t mode = brush.subpixel() ? protocol::TOOL_MODE_SUBPIXEL : 0;
mode |= brush.incremental() ? protocol::TOOL_MODE_INCREMENTAL : 0;
return protocol::MessagePtr(new protocol::ToolChange(
userid,
layer,
brush.blendingMode(),
mode,
brush.spacing(),
brush.color(1.0).rgba(),
brush.color(0.0).rgba(),
brush.hardness(1.0) * 255,
brush.hardness(0.0) * 255,
brush.radius(1.0),
brush.radius(0.0),
brush.opacity(1.0) * 255,
brush.opacity(0.0) * 255
));
}