Merge latest from ocornut/imgui

examples/directx12_example/imgui_impl_dx12.h

@@ -1,17 +1,22 @@
 // ImGui Win32 + DirectX12 binding
+// In this binding, ImTextureID is used to store a 'D3D12_GPU_DESCRIPTOR_HANDLE' texture identifier. Read the FAQ about ImTextureID in imgui.cpp.
+
 // You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
 // If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
 // If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
 // https://github.com/ocornut/imgui
 
-#include <d3d12.h>
+struct ID3D12Device;
+struct ID3D12GraphicsCommandList;
+struct D3D12_CPU_DESCRIPTOR_HANDLE;
+struct D3D12_GPU_DESCRIPTOR_HANDLE;
 
 // cmdList is the command list that the implementation will use to render the
 // GUI.
 //
 // Before calling ImGui::Render(), caller must prepare cmdList by resetting it
 // and setting the appropriate render target and descriptor heap that contains
-// fontSrv*puDescHandle.
+// fontSrvCpuDescHandle/fontSrvGpuDescHandle.
 //
 // fontSrvCpuDescHandle and fontSrvGpuDescHandle are handles to a single SRV
 // descriptor to use for the internal font texture.