bool GiCanvasGdip::beginPaint(HDC hdc, HDC attribDC, bool buffered, bool overlay)
{
bool ret = (NULL == m_draw->m_gs)
&& GiCanvasWin::beginPaint(hdc, attribDC, buffered, overlay);
if (!ret)
return false;
buffered = buffered && !gs()->isPrint();
COLORREF cr = ::GetBkColor(hdc);
m_draw->m_bkColor.set(GetRValue(cr), GetGValue(cr), GetBValue(cr));
GdipOverlayBmp oldDrawing;
if (buffered && overlay)
oldDrawing.save(m_owner, hdc);
m_draw->m_gs = new G::Graphics(hdc);
if (m_draw->m_gs == NULL)
{
GiCanvasWin::endPaint(false);
return false;
}
if (buffered)
{
m_draw->m_memBitmap = new G::Bitmap(xf().getWidth(), xf().getHeight());
m_draw->m_memGs = G::Graphics::FromImage(m_draw->m_memBitmap);
oldDrawing.draw(m_draw->m_memGs);
}
_antiAliasModeChanged(gs()->isAntiAliasMode());
return ret;
}
void GiGraphics::setAntiAliasMode(bool antiAlias)
{
m_impl->antiAlias = antiAlias;
SafeCall(m_impl->canvas, _antiAliasModeChanged(antiAlias));
}
