void scheduleDrawOp(DrawOp op)
{
if (clipRectStack.clippedWorldAway())
return;
#ifdef GOSU_IS_IPHONE
// No triangles, no lines supported
assert (op.verticesOrBlockIndex == 4);
#endif
op.renderState.transform = &transformStack.current();
if (const ClipRect* cr = clipRectStack.maybeEffectiveRect())
op.renderState.clipRect = *cr;
ops.push_back(op);
}
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 = &transformStack.current();
if (const ClipRect* cr = clipRectStack.maybeEffectiveRect())
op.renderState.clipRect = *cr;
op.z = z;
ops.push_back(op);
}
void beginClipping(double x, double y, double width, double height, double screenHeight)
{
// Apply current transformation.
double left = x, right = x + width;
double top = y, bottom = y + height;
applyTransform(transformStack.current(), left, top);
applyTransform(transformStack.current(), right, bottom);
double physX = std::min(left, right);
double physY = std::min(top, bottom);
double physWidth = std::abs(left - right);
double physHeight = std::abs(top - bottom);
// Adjust for OpenGL having the wrong idea of where y=0 is.
// TODO: This should really happen *right before* setting up
// the glScissor.
physY = screenHeight - physY - physHeight;
clipRectStack.beginClipping(physX, physY, physWidth, physHeight);
}