void scheduleGL(std::tr1::function<void()> glBlock, ZPos z)
{
// TODO: Document this case: Clipped-away GL blocks are *not* being run.
if (clipRectStack.clippedWorldAway())
return;
int complementOfBlockIndex = ~(int)glBlocks.size();
glBlocks.push_back(glBlock);
DrawOp op;
op.verticesOrBlockIndex = complementOfBlockIndex;
op.renderState.transform = ¤tTransform();
if (const ClipRect* cr = clipRectStack.maybeEffectiveRect())
op.renderState.clipRect = *cr;
op.z = z;
ops.push_back(op);
}
void compileTo(VertexArrays& vas)
{
if (!glBlocks.empty())
throw std::logic_error("Custom code cannot be recorded into a macro");
std::stable_sort(ops.begin(), ops.end());
for (DrawOps::const_iterator op = ops.begin(), end = ops.end(); op != end; ++op)
op->compileTo(vas);
}
void clear()
{
absoluteTransforms.resize(1);
// Important!! Due to all the swapping, the first entry in the list is not necessarily
// the base matrix. We need to restore it.
absoluteTransforms.front() = scale(1);
individualTransforms.resize(1);
clipRectStack.clear();
glBlocks.clear();
ops.clear();
}
void performDrawOpsAndCode()
{
// Apply Z-Ordering.
std::stable_sort(ops.begin(), ops.end());
RenderStateManager manager;
#ifdef GOSU_IS_IPHONE
if (ops.empty())
return;
DrawOps::const_iterator current = ops.begin(), last = ops.end() - 1;
for (; current != last; ++current)
{
manager.setRenderState(current->renderState);
current->perform(&*(current + 1));
}
manager.setRenderState(last->renderState);
last->perform(0);
#else
for (DrawOps::const_iterator current = ops.begin(), last = ops.end();
current != last; ++current)
{
manager.setRenderState(current->renderState);
if (current->verticesOrBlockIndex >= 0)
current->perform(0);
else
{
// GL code
int blockIndex = ~current->verticesOrBlockIndex;
assert (blockIndex >= 0);
assert (blockIndex < glBlocks.size());
glBlocks[blockIndex]();
manager.enforceAfterUntrustedGL();
}
}
#endif
}
// This retains the current stack of transforms and clippings.
void clearQueue()
{
glBlocks.clear();
ops.clear();
}
