Wrap the auxiliary functions for ImGuiImplSDL2 and 3.

Author: James Johnson

Imgui/interface/ImGuiImplSDL2.hpp

@@ -30,6 +30,7 @@
 #include "ImGuiImplDiligent.hpp"
 
 extern "C" struct SDL_Window;
+extern "C" struct _SDL_GameController;
 extern "C" union SDL_Event;
 
 namespace Diligent
@@ -55,5 +56,14 @@ class ImGuiImplSDL2 final : public ImGuiImplDiligent
                           SURFACE_TRANSFORM SurfacePreTransform) override final;
     virtual void Render(IDeviceContext* pCtx) override final;
     bool         HandleSDLEvent(const SDL_Event* ev);
+    float        GetContentScaleForWindow(SDL_Window* pWindow);
+    float        GetContentScaleForDisplay(int pDisplayIndex);
+    enum GAMEPAD_MODE
+    {
+        GAMEPAD_MODE_AUTO_FIRST,
+        GAMEPAD_MODE_AUTO_ALL,
+        GAMEPAD_MODE_MANUAL
+    };
+    void SetGamepadMode(GAMEPAD_MODE mode, _SDL_GameController** pManualGamepadsArray = nullptr, int pManualGamepadsCount = -1);
 };
 } // namespace Diligent

Imgui/interface/ImGuiImplSDL3.hpp

@@ -30,6 +30,7 @@
 #include "ImGuiImplDiligent.hpp"
 
 extern "C" struct SDL_Window;
+extern "C" struct SDL_Gamepad;
 extern "C" union SDL_Event;
 
 namespace Diligent
@@ -55,5 +56,12 @@ class ImGuiImplSDL3 final : public ImGuiImplDiligent
                           SURFACE_TRANSFORM SurfacePreTransform) override final;
     virtual void Render(IDeviceContext* pCtx) override final;
     bool         HandleSDLEvent(const SDL_Event* ev);
+    enum GAMEPAD_MODE
+    {
+        GAMEPAD_MODE_AUTO_FIRST,
+        GAMEPAD_MODE_AUTO_ALL,
+        GAMEPAD_MODE_MANUAL
+    };
+    void SetGamepadMode(GAMEPAD_MODE mode, SDL_Gamepad** pManualGamepadsArray = nullptr, int pManualGamepadsCount = -1);
 };
 } // namespace Diligent

Imgui/src/ImGuiImplSDL2.cpp

@@ -92,4 +92,32 @@ bool ImGuiImplSDL2::HandleSDLEvent(const SDL_Event* ev)
     return ImGui_ImplSDL2_ProcessEvent(ev);
 }
 
+float ImGuiImplSDL2::GetContentScaleForWindow(SDL_Window* pWindow)
+{
+    return ImGui_ImplSDL2_GetContentScaleForWindow(pWindow);
+}
+
+float ImGuiImplSDL2::GetContentScaleForDisplay(int pDisplayIndex)
+{
+    return ImGui_ImplSDL2_GetContentScaleForDisplay(pDisplayIndex);
+}
+
+void ImGuiImplSDL2::SetGamepadMode(GAMEPAD_MODE pGamepadMode, _SDL_GameController** pManualGamepadsArray, int pManualGamepadsCount)
+{
+    ImGui_ImplSDL2_GamepadMode GamepadMode{};
+    switch (pGamepadMode)
+    {
+        case GAMEPAD_MODE_AUTO_FIRST:
+            GamepadMode = ImGui_ImplSDL2_GamepadMode_AutoFirst;
+            break;
+        case GAMEPAD_MODE_AUTO_ALL:
+            GamepadMode = ImGui_ImplSDL2_GamepadMode_AutoAll;
+            break;
+        case GAMEPAD_MODE_MANUAL:
+            GamepadMode = ImGui_ImplSDL2_GamepadMode_Manual;
+            break;
+    }
+    ImGui_ImplSDL2_SetGamepadMode(GamepadMode, pManualGamepadsArray, pManualGamepadsCount);
+}
+
 } // namespace Diligent

Imgui/src/ImGuiImplSDL3.cpp

@@ -92,4 +92,22 @@ bool ImGuiImplSDL3::HandleSDLEvent(const SDL_Event* ev)
     return ImGui_ImplSDL3_ProcessEvent(ev);
 }
 
+void ImGuiImplSDL3::SetGamepadMode(GAMEPAD_MODE pGamepadMode, SDL_Gamepad** pManualGamepadsArray, int pManualGamepadsCount)
+{
+    ImGui_ImplSDL3_GamepadMode GamepadMode{};
+    switch (pGamepadMode)
+    {
+        case GAMEPAD_MODE_AUTO_FIRST:
+            GamepadMode = ImGui_ImplSDL3_GamepadMode_AutoFirst;
+            break;
+        case GAMEPAD_MODE_AUTO_ALL:
+            GamepadMode = ImGui_ImplSDL3_GamepadMode_AutoAll;
+            break;
+        case GAMEPAD_MODE_MANUAL:
+            GamepadMode = ImGui_ImplSDL3_GamepadMode_Manual;
+            break;
+    }
+    ImGui_ImplSDL3_SetGamepadMode(GamepadMode, pManualGamepadsArray, pManualGamepadsCount);
+}
+
 } // namespace Diligent