//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void Rendering::renderOverlayItems(OpenGLContext* oglContext, bool useSoftwareRendering)
{
OverlayItemRectMap itemRectMap;
calculateOverlayItemLayout(&itemRectMap);
// Must setup a scissor to limit the overlay items to the current viewport, as they might setup a local viewport (e.g. navigation cube)
GLboolean scissorWasOn = glIsEnabled(GL_SCISSOR_TEST);
int scissorBox[4] = {0, 0, -1, -1};
glGetIntegerv(GL_SCISSOR_BOX, scissorBox);
glScissor(static_cast<GLsizei>(m_camera->viewport()->x()), static_cast<GLsizei>(m_camera->viewport()->y()), static_cast<GLsizei>(m_camera->viewport()->width()), static_cast<GLsizei>(m_camera->viewport()->height()));
glEnable(GL_SCISSOR_TEST);
const size_t numOverlayItems = m_overlayItems.size();
for (size_t i = 0; i < numOverlayItems; i++)
{
OverlayItem* item = m_overlayItems.at(i);
Vec2i pos(0, 0);
Vec2ui size(0, 0);
if (item->layoutScheme() == OverlayItem::FIXED_POSITION)
{
pos = item->fixedPosition();
size = item->sizeHint();
}
else
{
// Item should be laid out already - grab its pos/size from the layout map
OverlayItemRectMap::iterator it = itemRectMap.find(item);
if (it != itemRectMap.end())
{
Recti rect = it->second;
pos = rect.min();
size.set(static_cast<uint>(rect.width()), static_cast<uint>(rect.height()));
}
}
if (!size.isZero())
{
if (useSoftwareRendering)
{
item->renderSoftware(oglContext, pos, size);
}
else
{
item->render(oglContext, pos, size);
}
}
}
// Restore scissor settings
if (!scissorWasOn) glDisable(GL_SCISSOR_TEST);
glScissor(scissorBox[0], scissorBox[1], scissorBox[2], scissorBox[3]);
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
cvf::Recti Rendering::overlayItemRect(OverlayItem* item)
{
OverlayItemRectMap itemRectMap;
calculateOverlayItemLayout(&itemRectMap);
OverlayItemRectMap::iterator it = itemRectMap.find(item);
if (it != itemRectMap.end())
{
return it->second;
}
return cvf::Recti();
}
//--------------------------------------------------------------------------------------------------
/// Get the the overlay item (if any) at the given cursor position
//--------------------------------------------------------------------------------------------------
OverlayItem* Rendering::overlayItemFromWindowCoordinates(int x, int y)
{
OverlayItemRectMap itemRectMap;
calculateOverlayItemLayout(&itemRectMap);
const size_t numOverlayItems = m_overlayItems.size();
for (size_t i = 0; i < numOverlayItems; i++)
{
OverlayItem* item = m_overlayItems.at(i);
OverlayItemRectMap::iterator it = itemRectMap.find(item);
if (it != itemRectMap.end())
{
Recti rect = it->second;
if (item->pick(x, y, rect.min(), Vec2ui(static_cast<cvf::uint>(rect.width()), static_cast<cvf::uint>(rect.height()))))
{
return item;
}
}
}
return NULL;
}
