From eb574849356a4edec42aadb22d11157054248077 Mon Sep 17 00:00:00 2001
From: Xiliusha <Xiliusha@outlook.com>
Date: Fri, 26 Feb 2021 10:40:22 +0800
Subject: [PATCH] Backends: DX9: add missing IMGUI_USE_BGRA_PACKED_COLOR
 support. Remove dinput.h headers. (#3844)

---
 backends/imgui_impl_dx9.cpp               | 11 +++++++----
 docs/CHANGELOG.txt                        |  1 +
 examples/example_win32_directx10/main.cpp |  2 --
 examples/example_win32_directx11/main.cpp |  2 --
 examples/example_win32_directx9/main.cpp  |  2 --
 5 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/backends/imgui_impl_dx9.cpp b/backends/imgui_impl_dx9.cpp
index 44dea337..7e851ec7 100644
--- a/backends/imgui_impl_dx9.cpp
+++ b/backends/imgui_impl_dx9.cpp
@@ -11,6 +11,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
+//  2021-03-03: DirectX9: Added support for IMGUI_USE_BGRA_PACKED_COLOR in user's imconfig file.
 //  2021-02-18: DirectX9: Change blending equation to preserve alpha in output buffer.
 //  2019-05-29: DirectX9: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
 //  2019-04-30: DirectX9: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
@@ -28,8 +29,6 @@
 
 // DirectX
 #include <d3d9.h>
-#define DIRECTINPUT_VERSION 0x0800
-#include <dinput.h>
 
 // DirectX data
 static LPDIRECT3DDEVICE9        g_pd3dDevice = NULL;
@@ -140,7 +139,7 @@ void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
     g_pd3dDevice->GetTransform(D3DTS_PROJECTION, &last_projection);
 
     // Copy and convert all vertices into a single contiguous buffer, convert colors to DX9 default format.
-    // FIXME-OPT: This is a waste of resource, the ideal is to use imconfig.h and
+    // FIXME-OPT: This is a minor waste of resource, the ideal is to use imconfig.h and
     //  1) to avoid repacking colors:   #define IMGUI_USE_BGRA_PACKED_COLOR
     //  2) to avoid repacking vertices: #define IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT struct ImDrawVert { ImVec2 pos; float z; ImU32 col; ImVec2 uv; }
     CUSTOMVERTEX* vtx_dst;
@@ -158,7 +157,11 @@ void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
             vtx_dst->pos[0] = vtx_src->pos.x;
             vtx_dst->pos[1] = vtx_src->pos.y;
             vtx_dst->pos[2] = 0.0f;
-            vtx_dst->col = (vtx_src->col & 0xFF00FF00) | ((vtx_src->col & 0xFF0000) >> 16) | ((vtx_src->col & 0xFF) << 16);     // RGBA --> ARGB for DirectX9
+#ifdef IMGUI_USE_BGRA_PACKED_COLOR
+            vtx_dst->col = vtx_src->col;
+#else
+            vtx_dst->col = (vtx_src->col & 0xFF00FF00) | ((vtx_src->col & 0xFF0000) >> 16) | ((vtx_src->col & 0xFF) << 16); // RGBA --> ARGB for DirectX9
+#endif
             vtx_dst->uv[0] = vtx_src->uv.x;
             vtx_dst->uv[1] = vtx_src->uv.y;
             vtx_dst++;
diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index 10761cdb..bc9a75c3 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -62,6 +62,7 @@ Other Changes:
   preserve alpha in output buffer (using SrcBlendAlpha = ONE, DstBlendAlpha = ONE_MINUS_SRC_ALPHA consistently
   accross all backends), facilitating compositing of the output buffer with another buffer.
   (#2693, #2764, #2766, #2873, #3447, #3813, #3816) [@ocornut, @thedmd, @ShawnM427, @Ubpa, @aiekick]
+- Backends: DX9: Fix to support IMGUI_USE_BGRA_PACKED_COLOR. (#3844) [@Xiliusha]
 - Examples: Reworked setup of clear color to be compatible with transparent values.
 - CI: Use a dedicated "scheduled" workflow to trigger scheduled builds. Forks may disable this workflow if
   scheduled builds builds are not required. [@rokups]
diff --git a/examples/example_win32_directx10/main.cpp b/examples/example_win32_directx10/main.cpp
index 2a131c18..b1360018 100644
--- a/examples/example_win32_directx10/main.cpp
+++ b/examples/example_win32_directx10/main.cpp
@@ -7,8 +7,6 @@
 #include "imgui_impl_dx10.h"
 #include <d3d10_1.h>
 #include <d3d10.h>
-#define DIRECTINPUT_VERSION 0x0800
-#include <dinput.h>
 #include <tchar.h>
 
 // Data
diff --git a/examples/example_win32_directx11/main.cpp b/examples/example_win32_directx11/main.cpp
index dd14c2e1..e882f6a1 100644
--- a/examples/example_win32_directx11/main.cpp
+++ b/examples/example_win32_directx11/main.cpp
@@ -6,8 +6,6 @@
 #include "imgui_impl_win32.h"
 #include "imgui_impl_dx11.h"
 #include <d3d11.h>
-#define DIRECTINPUT_VERSION 0x0800
-#include <dinput.h>
 #include <tchar.h>
 
 // Data
diff --git a/examples/example_win32_directx9/main.cpp b/examples/example_win32_directx9/main.cpp
index 54e7026a..ce59a9a8 100644
--- a/examples/example_win32_directx9/main.cpp
+++ b/examples/example_win32_directx9/main.cpp
@@ -6,8 +6,6 @@
 #include "imgui_impl_dx9.h"
 #include "imgui_impl_win32.h"
 #include <d3d9.h>
-#define DIRECTINPUT_VERSION 0x0800
-#include <dinput.h>
 #include <tchar.h>
 
 // Data