void ExpandCelCanvas::validateSourceCanvas(const gfx::Region& rgn)
{
getSourceCanvas();
gfx::Region rgnToValidate(rgn);
rgnToValidate.offset(-m_bounds.getOrigin());
rgnToValidate.createSubtraction(rgnToValidate, m_validSrcRegion);
rgnToValidate.createIntersection(rgnToValidate, gfx::Region(m_srcImage->bounds()));
if (m_celImage) {
gfx::Region rgnToClear;
rgnToClear.createSubtraction(rgnToValidate,
gfx::Region(m_celImage->bounds()
.offset(m_origCelPos)
.offset(-m_bounds.getOrigin())));
for (const auto& rc : rgnToClear)
fill_rect(m_srcImage, rc, m_srcImage->maskColor());
for (const auto& rc : rgnToValidate)
m_srcImage->copy(m_celImage, rc.x, rc.y,
rc.x+m_bounds.x-m_origCelPos.x,
rc.y+m_bounds.y-m_origCelPos.y, rc.w, rc.h);
}
else {
for (const auto& rc : rgnToValidate)
fill_rect(m_srcImage, rc, m_srcImage->maskColor());
}
m_validSrcRegion.createUnion(m_validSrcRegion, rgnToValidate);
}
void ExpandCelCanvas::validateDestCanvas(const gfx::Region& rgn)
{
Image* src;
int src_x, src_y;
if ((m_flags & NeedsSource) == NeedsSource) {
validateSourceCanvas(rgn);
src = m_srcImage.get();
src_x = m_bounds.x;
src_y = m_bounds.y;
}
else {
src = m_celImage.get();
src_x = m_origCelPos.x;
src_y = m_origCelPos.y;
}
getDestCanvas();
gfx::Region rgnToValidate(rgn);
rgnToValidate.offset(-m_bounds.origin());
rgnToValidate.createSubtraction(rgnToValidate, m_validDstRegion);
rgnToValidate.createIntersection(rgnToValidate, gfx::Region(m_dstImage->bounds()));
if (src) {
gfx::Region rgnToClear;
rgnToClear.createSubtraction(rgnToValidate,
gfx::Region(src->bounds()
.offset(src_x, src_y)
.offset(-m_bounds.origin())));
for (const auto& rc : rgnToClear)
fill_rect(m_dstImage.get(), rc, m_dstImage->maskColor());
for (const auto& rc : rgnToValidate)
m_dstImage->copy(src,
gfx::Clip(rc.x, rc.y,
rc.x+m_bounds.x-src_x,
rc.y+m_bounds.y-src_y, rc.w, rc.h));
}
else {
for (const auto& rc : rgnToValidate)
fill_rect(m_dstImage.get(), rc, m_dstImage->maskColor());
}
m_validDstRegion.createUnion(m_validDstRegion, rgnToValidate);
}
