void HorizontalSymmetry::generateStrokes(const Stroke& mainStroke, Strokes& strokes,
ToolLoop* loop)
{
int adjust = (loop->getBrush()->bounds().w % 2);
strokes.push_back(mainStroke);
Stroke stroke2;
for (const auto& pt : mainStroke)
stroke2.addPoint(gfx::Point(m_x - (pt.x - m_x + adjust), pt.y));
strokes.push_back(stroke2);
}
void VerticalSymmetry::generateStrokes(const Stroke& mainStroke, Strokes& strokes,
ToolLoop* loop)
{
int adjust = (loop->getBrush()->bounds().h % 2);
strokes.push_back(mainStroke);
Stroke stroke2;
for (const auto& pt : mainStroke)
stroke2.addPoint(gfx::Point(pt.x, m_y - (pt.y - m_y + adjust)));
strokes.push_back(stroke2);
}
void ToolLoopManager::doLoopStep(bool last_step)
{
// Original set of points to interwine (original user stroke,
// relative to sprite origin).
Stroke main_stroke;
if (!last_step)
m_toolLoop->getController()->getStrokeToInterwine(m_stroke, main_stroke);
else
main_stroke = m_stroke;
// Calculate the area to be updated in all document observers.
Symmetry* symmetry = m_toolLoop->getSymmetry();
Strokes strokes;
if (symmetry)
symmetry->generateStrokes(main_stroke, strokes, m_toolLoop);
else
strokes.push_back(main_stroke);
calculateDirtyArea(strokes);
// Validate source image area.
if (m_toolLoop->getInk()->needsSpecialSourceArea()) {
gfx::Region srcArea;
m_toolLoop->getInk()->createSpecialSourceArea(m_dirtyArea, srcArea);
m_toolLoop->validateSrcImage(srcArea);
}
else {
m_toolLoop->validateSrcImage(m_dirtyArea);
}
m_toolLoop->getInk()->prepareForStrokes(m_toolLoop, strokes);
// Invalidate destionation image areas.
if (m_toolLoop->getTracePolicy() == TracePolicy::Last) {
// Copy source to destination (reset the previous trace). Useful
// for tools like Line and Ellipse (we kept the last trace only).
m_toolLoop->invalidateDstImage();
}
else if (m_toolLoop->getTracePolicy() == TracePolicy::AccumulateUpdateLast) {
// Revalidate only this last dirty area (e.g. pixel-perfect
// freehand algorithm needs this trace policy to redraw only the
// last dirty area, which can vary in one pixel from the previous
// tool loop cycle).
m_toolLoop->invalidateDstImage(m_dirtyArea);
}
m_toolLoop->validateDstImage(m_dirtyArea);
// Join or fill user points
if (!m_toolLoop->getFilled() || (!last_step && !m_toolLoop->getPreviewFilled()))
m_toolLoop->getIntertwine()->joinStroke(m_toolLoop, main_stroke);
else
m_toolLoop->getIntertwine()->fillStroke(m_toolLoop, main_stroke);
if (m_toolLoop->getTracePolicy() == TracePolicy::Overlap) {
// Copy destination to source (yes, destination to source). In
// this way each new trace overlaps the previous one.
m_toolLoop->copyValidDstToSrcImage(m_dirtyArea);
}
if (!m_dirtyArea.isEmpty())
m_toolLoop->updateDirtyArea();
}
