Backends: DX12: use dxgiformat.h to fix using forward declared DXGI_FORMAT (#4594)

backends/imgui_impl_dx12.h

@@ -16,13 +16,8 @@
 
 #pragma once
 #include "imgui.h"      // IMGUI_IMPL_API
+#include <dxgiformat.h> // DXGI_FORMAT
 
-#ifdef _MSC_VER
-#pragma warning (push)
-#pragma warning (disable: 4471) // a forward declaration of an unscoped enumeration must have an underlying type
-#endif
-
-enum DXGI_FORMAT;
 struct ID3D12Device;
 struct ID3D12DescriptorHeap;
 struct ID3D12GraphicsCommandList;
@@ -42,8 +37,3 @@ IMGUI_IMPL_API void     ImGui_ImplDX12_RenderDrawData(ImDrawData* draw_data, ID3
 // Use if you want to reset your rendering device without losing Dear ImGui state.
 IMGUI_IMPL_API void     ImGui_ImplDX12_InvalidateDeviceObjects();
 IMGUI_IMPL_API bool     ImGui_ImplDX12_CreateDeviceObjects();
-
-#ifdef _MSC_VER
-#pragma warning (pop)
-#endif
-

docs/FONTS.md

@@ -27,11 +27,11 @@ In the [misc/fonts/](https://github.com/ocornut/imgui/tree/master/misc/fonts) fo
 ---------------------------------------
  ## Readme First
 
-- All loaded fonts glyphs are rendered into a single texture atlas ahead of time. Calling either of `io.Fonts->GetTexDataAsAlpha8()`, `io.Fonts->GetTexDataAsRGBA32()` or `io.Fonts->Build()` will build the atlas.
+- You can use the `Metrics/Debugger` window (available in `Demo>Tools`) to browse your fonts and understand what's going on if you have an issue. You can also reach it in `Demo->Tools->Style Editor->Fonts`. The same information are also available in the Style Editor under Fonts.
 
-- You can use the style editor `ImGui::ShowStyleEditor()` in the "Fonts" section to browse your fonts and understand what's going on if you have an issue. You can also reach it in `Demo->Tools->Style Editor->Fonts`:
+![imgui_capture_0008](https://user-images.githubusercontent.com/8225057/135429892-0e41ef8d-33c5-4991-bcf6-f997a0bcfd6b.png)
 
-![imgui_capture_0008](https://user-images.githubusercontent.com/8225057/84162822-1a731f00-aa71-11ea-9b6b-89c2332aa161.png)
+- All loaded fonts glyphs are rendered into a single texture atlas ahead of time. Calling either of `io.Fonts->GetTexDataAsAlpha8()`, `io.Fonts->GetTexDataAsRGBA32()` or `io.Fonts->Build()` will build the atlas.
 
 - Make sure your font ranges data are persistent (available during the calls to `GetTexDataAsAlpha8()`/`GetTexDataAsRGBA32()/`Build()`.