Backends: SDL_Renderer3: fixed default sampler not being Linear. (#7616, #9470, #9378)

backends/imgui_impl_sdlrenderer3.cpp

@@ -25,6 +25,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
+//  2026-07-15: Fixed default sampler state to be linear (broken 2026-04-23). (#9470, #9378)
 //  2026-04-23: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. (#9378)
 //  2026-03-12: Fixed invalid assert in ImGui_ImplSDLRenderer3_UpdateTexture() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295)
 //  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
@@ -77,10 +78,14 @@ static ImGui_ImplSDLRenderer3_Data* ImGui_ImplSDLRenderer3_GetBackendData()
 // Functions
 static void ImGui_ImplSDLRenderer3_SetupRenderState(SDL_Renderer* renderer)
 {
+    ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData();
+
     // Clear out any viewports and cliprect set by the user
     // FIXME: Technically speaking there are lots of other things we could backup/setup/restore during our render process.
     SDL_SetRenderViewport(renderer, nullptr);
     SDL_SetRenderClipRect(renderer, nullptr);
+
+    bd->CurrentScaleMode = SDL_SCALEMODE_LINEAR;
 }
 
 void ImGui_ImplSDLRenderer3_NewFrame()

docs/CHANGELOG.txt

@@ -158,6 +158,8 @@ Other Changes:
       Fixes an issue running on macOS with Wine. [#9427, #6577) [@perminovVS]
     - Expose selected render state in ImGui_ImplOpenGL3_RenderState, allowing to
       dynamically select between use of glBindSampler() and glTexParameter(). (#9378)
+  - SDLRenderer3:
+    - Fixed default sampler not being Linear. Regression in 1.92.8. (#7616, #9470, #9378) [@ShiroKSH]
   - Win32:
     - Uses `SetProcessDpiAwarenessContext()` instead of `SetThreadDpiAwarenessContext()`
       when available, fixing OpenGL DPI scaling issues as e.g. NVIDIA drivers tends