Sprite *ComposerEngine::addSprite(uint16 id, uint16 animId, uint16 zorder, const Common::Point &pos) {
Sprite sprite;
bool foundSprite = false;
// re-use old sprite, if any (the BMAP for this id might well have
// changed in the meantime, but the scripts depend on that!)
for (Common::List<Sprite>::iterator i = _sprites.begin(); i != _sprites.end(); i++) {
if (i->_id != id)
continue;
if (getGameType() == GType_ComposerV1) {
if (i->_animId != animId)
continue;
} else if (i->_animId && animId && (i->_animId != animId))
continue;
dirtySprite(*i);
// if the zordering is identical, modify it in-place
if (i->_zorder == zorder) {
i->_animId = animId;
i->_pos = pos;
dirtySprite(*i);
return &(*i);
}
// otherwise, take a copy and remove it from the list
sprite = *i;
foundSprite = true;
_sprites.erase(i);
break;
}
sprite._animId = animId;
sprite._zorder = zorder;
sprite._pos = pos;
if (!foundSprite) {
sprite._id = id;
if (!initSprite(sprite)) {
debug(1, "ignoring addSprite on invalid sprite %d", id);
return NULL;
}
}
dirtySprite(sprite);
for (Common::List<Sprite>::iterator i = _sprites.begin(); i != _sprites.end(); i++) {
if (sprite._zorder <= i->_zorder)
continue;
// insert *before* this sprite
_sprites.insert(i, sprite);
--i;
return &(*i);
}
_sprites.push_back(sprite);
return &_sprites.back();
}
void ComposerEngine::setBackground(uint16 id) {
for (Common::List<Sprite>::iterator i = _sprites.begin(); i != _sprites.end(); i++) {
if (i->_id)
continue;
dirtySprite(*i);
i->_surface.free();
i->_id = id;
if (!initSprite(*i))
error("failed to set background %d", id);
dirtySprite(*i);
i->_id = 0;
return;
}
Sprite *background = addSprite(id, 0, 0xffff, Common::Point());
if (background)
background->_id = 0;
}
void ComposerEngine::removeSprite(uint16 id, uint16 animId) {
for (Common::List<Sprite>::iterator i = _sprites.begin(); i != _sprites.end(); i++) {
if (!i->_id || (id && i->_id != id))
continue;
if (i->_animId && animId && (i->_animId != animId))
continue;
dirtySprite(*i);
i->_surface.free();
i = _sprites.reverse_erase(i);
if (id)
break;
}
}
