//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
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]);
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void Rendering::calculateOverlayItemLayoutForSchemeAndCorner(OverlayItemRectMap* itemRectMap, OverlayItem::LayoutScheme layoutScheme, OverlayItem::AnchorCorner anchorCorner)
{
CVF_ASSERT(layoutScheme == OverlayItem::HORIZONTAL || layoutScheme == OverlayItem::VERTICAL);
const int border = 3;
const Vec2i vpSize = Vec2i(static_cast<int>(m_camera->viewport()->width()), static_cast<int>(m_camera->viewport()->height()));
const Vec2i vpPos = Vec2i(m_camera->viewport()->x(), m_camera->viewport()->y());
Vec2i cursor(0,0);
switch (anchorCorner)
{
case OverlayItem::TOP_LEFT: cursor.set(border, vpSize.y() - border); break;
case OverlayItem::TOP_RIGHT: cursor.set(vpSize.x() - border, vpSize.y() - border); break;
case OverlayItem::BOTTOM_LEFT: cursor.set(border, border); break;
case OverlayItem::BOTTOM_RIGHT: cursor.set(vpSize.x() - border, border); break;
default: cursor.set(border,border);
}
cursor += vpPos;
// Adjust starting cursor position based on other already placed items in this anchor corner
// The assumption here is that for each corner, the horizontal layout has already been added to the map
if (layoutScheme == OverlayItem::VERTICAL)
{
OverlayItemRectMap::iterator it;
for (it = itemRectMap->begin(); it != itemRectMap->end(); ++it)
{
const OverlayItem* placedItem = it->first;
const Recti placedItemRect = it->second;
if (placedItem->anchorCorner() == anchorCorner && placedItemRect.contains(cursor))
{
if (anchorCorner == OverlayItem::BOTTOM_LEFT || anchorCorner == OverlayItem::BOTTOM_RIGHT)
{
cursor.y() += placedItemRect.height() + border;
}
else
{
cursor.y() -= placedItemRect.height() + border;
}
}
}
}
const size_t numOverlayItems = m_overlayItems.size();
for (size_t i = 0; i < numOverlayItems; i++)
{
OverlayItem* item = m_overlayItems.at(i);
if ((item->anchorCorner() == anchorCorner) && (item->layoutScheme() == layoutScheme))
{
// Find this position and size
Vec2i position = cursor;
Vec2ui size = item->sizeHint();
if ((anchorCorner == OverlayItem::TOP_RIGHT) || (anchorCorner == OverlayItem::BOTTOM_RIGHT))
{
position.x() -= size.x();
}
if ((anchorCorner == OverlayItem::TOP_LEFT) || (anchorCorner == OverlayItem::TOP_RIGHT))
{
position.y() -= size.y();
}
// Store the position in the map
Recti rect(position.x(), position.y(), static_cast<int>(size.x()), static_cast<int>(size.y()));
(*itemRectMap)[item] = rect;
// Find next position, moving the cursor
if (layoutScheme == OverlayItem::HORIZONTAL)
{
if ((anchorCorner == OverlayItem::TOP_LEFT) || (anchorCorner == OverlayItem::BOTTOM_LEFT))
{
cursor.x() += (size.x() + border);
}
else
{
cursor.x() -= (size.x() + border);
}
}
else if (layoutScheme == OverlayItem::VERTICAL)
{
if ((anchorCorner == OverlayItem::BOTTOM_LEFT) || (anchorCorner == OverlayItem::BOTTOM_RIGHT))
{
cursor.y() += (size.y() + border);
}
else
{
cursor.y() -= (size.y() + border);
}
}
else
{
CVF_FAIL_MSG("Unhandled OverlayItem::LayoutDirection");
}
}
}
}