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 = ¤tTransform();
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 = ¤tTransform();
if (const ClipRect* cr = clipRectStack.maybeEffectiveRect())
op.renderState.clipRect = *cr;
op.z = z;
ops.push_back(op);
}
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 beginClipping(int x, int y, int width, int height, int screenHeight)
{
// Apply current transformation.
double left = x, right = x + width;
double top = y, bottom = y + height;
applyTransform(currentTransform(), left, top);
applyTransform(currentTransform(), right, bottom);
int physX = std::min(left, right);
int physY = std::min(top, bottom);
int physWidth = std::abs(int(left - right));
int physHeight = std::abs(int(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);
}
void endClipping()
{
clipRectStack.endClipping();
}
// This clears the queue and starts with new stacks. This must not be called
// when endClipping/popTransform calls might still be pending.
void reset()
{
transformStack.reset();
clipRectStack.clear();
clearQueue();
}
