void GraphicsObjectData::render(const GraphicsObject& go,
const GraphicsObject* parent,
std::ostream* tree) {
boost::shared_ptr<const Surface> surface = currentSurface(go);
if (surface) {
Rect src = srcRect(go);
Rect dst = dstRect(go, parent);
int alpha = getRenderingAlpha(go, parent);
if (go.buttonUsingOverides()) {
// Tacked on side channel that lets a ButtonObjectSelectLongOperation
// tweak the x/y coordinates of dst. There isn't really a better place to
// put this. It can't go in dstRect() because the LongOperation also
// consults the data from dstRect().
dst = Rect(dst.origin() + Size(go.buttonXOffsetOverride(),
go.buttonYOffsetOverride()),
dst.size());
}
if (tree) {
objectInfo(*tree);
*tree << " Rendering " << src << " to " << dst << endl;
if (parent) {
*tree << " Parent: ";
PrintGraphicsObjectToTree(*parent, tree);
*tree << endl;
}
*tree << " Properties: ";
if (alpha != 255)
*tree << "(alpha=" << alpha << ") ";
PrintGraphicsObjectToTree(go, tree);
*tree << endl;
}
if (parent && parent->hasOwnClip()) {
// In Little Busters, a parent clip rect is used to clip text scrolling
// in the battle system. rlvm has the concept of parent objects badly
// hacked in, and that means we can't directly apply the own clip
// rect. Instead we have to calculate this in terms of the screen
// coordinates and then apply that as a global clip rect.
Point parent_start(parent->x() + parent->xAdjustmentSum(),
parent->y() + parent->yAdjustmentSum());
Rect full_parent_clip =
Rect(parent_start + parent->ownClipRect().origin(),
parent->ownClipRect().size());
Rect clipped_dest = dst.intersection(full_parent_clip);
Rect inset = dst.getInsetRectangle(clipped_dest);
dst = clipped_dest;
src = src.applyInset(inset);
if (tree) {
*tree << " Parent Own Clipping Rect: " << parent->ownClipRect()
<< endl
<< " After clipping: " << src << " to " << dst << endl;
}
}
if (go.hasOwnClip()) {
dst = dst.applyInset(go.ownClipRect());
src = src.applyInset(go.ownClipRect());
if (tree) {
*tree << " Internal Clipping Rect: " << go.ownClipRect() << endl
<< " After internal clipping: " << src << " to " << dst
<< endl;
}
}
// Perform the object clipping.
if (go.hasClip()) {
Rect clipped_dest = dst.intersection(go.clipRect());
// Do nothing if object falls wholly outside clip area
if (clipped_dest.isEmpty())
return;
// Adjust the source rectangle
Rect inset = dst.getInsetRectangle(clipped_dest);
dst = clipped_dest;
src = src.applyInset(inset);
if (tree) {
*tree << " Clipping Rect: " << go.clipRect() << endl
<< " After clipping: " << src << " to " << dst << endl;
}
}
// TODO: Do we want to skip this if no alpha?
surface->renderToScreenAsObject(go, src, dst, alpha);
}
}
