Backends: SDL2,SDL3: added ImGui_ImplSDL2_InitForOther() / ImGui_ImplSDL3_InitForOther().

e.g. WebGPU users use a similarly named functions from GLFW backend.

backends/imgui_impl_sdl2.cpp

@@ -478,6 +478,11 @@ bool ImGui_ImplSDL2_InitForSDLRenderer(SDL_Window* window, SDL_Renderer* rendere
     return ImGui_ImplSDL2_Init(window, renderer);
 }
 
+bool ImGui_ImplSDL2_InitForOther(SDL_Window* window)
+{
+    return ImGui_ImplSDL2_Init(window, nullptr);
+}
+
 void ImGui_ImplSDL2_Shutdown()
 {
     ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();

backends/imgui_impl_sdl2.h

@@ -28,6 +28,7 @@ IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForVulkan(SDL_Window* window);
 IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForD3D(SDL_Window* window);
 IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForMetal(SDL_Window* window);
 IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForSDLRenderer(SDL_Window* window, SDL_Renderer* renderer);
+IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForOther(SDL_Window* window);
 IMGUI_IMPL_API void     ImGui_ImplSDL2_Shutdown();
 IMGUI_IMPL_API void     ImGui_ImplSDL2_NewFrame();
 IMGUI_IMPL_API bool     ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event);

backends/imgui_impl_sdl3.cpp

@@ -413,6 +413,11 @@ bool ImGui_ImplSDL3_InitForSDLRenderer(SDL_Window* window, SDL_Renderer* rendere
     return ImGui_ImplSDL3_Init(window, renderer);
 }
 
+bool ImGui_ImplSDL2_InitForOther(SDL_Window* window)
+{
+    return ImGui_ImplSDL2_Init(window, nullptr);
+}
+
 void ImGui_ImplSDL3_Shutdown()
 {
     ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();

backends/imgui_impl_sdl3.h

@@ -30,6 +30,7 @@ IMGUI_IMPL_API bool     ImGui_ImplSDL3_InitForVulkan(SDL_Window* window);
 IMGUI_IMPL_API bool     ImGui_ImplSDL3_InitForD3D(SDL_Window* window);
 IMGUI_IMPL_API bool     ImGui_ImplSDL3_InitForMetal(SDL_Window* window);
 IMGUI_IMPL_API bool     ImGui_ImplSDL3_InitForSDLRenderer(SDL_Window* window, SDL_Renderer* renderer);
+IMGUI_IMPL_API bool     ImGui_ImplSDL3_InitForOther(SDL_Window* window);
 IMGUI_IMPL_API void     ImGui_ImplSDL3_Shutdown();
 IMGUI_IMPL_API void     ImGui_ImplSDL3_NewFrame();
 IMGUI_IMPL_API bool     ImGui_ImplSDL3_ProcessEvent(const SDL_Event* event);

docs/CHANGELOG.txt

@@ -58,6 +58,9 @@ Other changes:
 - Debug Tools: Metrics: Fixed "Drawlists" section and per-viewport equivalent
   appearing empty (regression in 1.89.8).
 - Demo: Demonstrate out-of-order rendering using ImDrawListSplitter.
+- Backends: SDL2,SDL3: added ImGui_ImplSDL2_InitForOther()/ImGui_ImplSDL3_InitForOther()
+  for consistency (matching GLFW backend) and as most initialization paths don't actually
+  need to care about rendering backend.
 
 
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