public void Begin(int fixWidth = -1, int fixHeight = -1)
{
ImGuiHelper.AnimatingElement();
var renderWidth = Math.Max(120, (int)ImGui.GetWindowWidth() - MarginW);
var renderHeight = Math.Max(120, (int)ImGui.GetWindowHeight() - MarginH);
if (fixWidth > 0)
{
renderWidth = fixWidth;
}
if (fixHeight > 0)
{
renderHeight = fixHeight;
}
//Generate render target
if (rh != renderHeight || rw != renderWidth)
{
if (RenderTarget != null)
{
ImGuiHelper.DeregisterTexture(RenderTarget.Texture);
RenderTarget.Dispose();
}
RenderTarget = new RenderTarget2D(renderWidth, renderHeight);
rid = ImGuiHelper.RegisterTexture(RenderTarget.Texture);
rw = renderWidth;
rh = renderHeight;
}
if (mw.Config.MSAA != 0 && ((mrw != rw) || (mrh != rh) || (msamples != mw.Config.MSAA)))
{
if (msaa != null)
{
msaa.Dispose();
}
msaa = new MultisampleTarget(rw, rh, mw.Config.MSAA);
}
else if (msaa != null)
{
msaa.Dispose();
mrw = mrh = -1;
msamples = 0;
msaa = null;
}
cc = rstate.ClearColor;
if (mw.Config.MSAA != 0)
{
rstate.RenderTarget = msaa;
}
else
{
rstate.RenderTarget = RenderTarget;
}
vps.Push(0, 0, rw, rh);
rstate.Cull = true;
rstate.DepthEnabled = true;
rstate.ClearColor = Background;
rstate.ClearAll();
}