Backends+Examples: SDL2: renamed imgui_impl_sdl.cpp/.h to imgui_impl_sdl2.cpp/.h. (#6146)

+ CI: Update Windows CI to update SDL 2.26.3 instead of 2.0.10

docs/BACKENDS.md

@@ -6,7 +6,7 @@ _(You may browse this at https://github.com/ocornut/imgui/blob/master/docs/BACKE
 your application or engine to easily integrate Dear ImGui.** Each backend is typically self-contained in a pair of files: imgui_impl_XXXX.cpp + imgui_impl_XXXX.h.
 
 - The 'Platform' backends are in charge of: mouse/keyboard/gamepad inputs, cursor shape, timing, and windowing.<BR>
-  e.g. Windows ([imgui_impl_win32.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_win32.cpp)), GLFW ([imgui_impl_glfw.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_glfw.cpp)), SDL2 ([imgui_impl_sdl.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_sdl.cpp)), etc.
+  e.g. Windows ([imgui_impl_win32.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_win32.cpp)), GLFW ([imgui_impl_glfw.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_glfw.cpp)), SDL2 ([imgui_impl_sdl2.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_sdl2.cpp)), etc.
 
 - The 'Renderer' backends are in charge of: creating atlas texture, and rendering imgui draw data.<BR>
   e.g. DirectX11 ([imgui_impl_dx11.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_dx11.cpp)), OpenGL/WebGL ([imgui_impl_opengl3.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_opengl3.cpp)), Vulkan ([imgui_impl_vulkan.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_vulkan.cpp)), etc.
@@ -62,7 +62,7 @@ List of Platforms Backends:
     imgui_impl_android.cpp    ; Android native app API
     imgui_impl_glfw.cpp       ; GLFW (Windows, macOS, Linux, etc.) http://www.glfw.org/
     imgui_impl_osx.mm         ; macOS native API (not as feature complete as glfw/sdl backends)
-    imgui_impl_sdl.cpp        ; SDL2 (Windows, macOS, Linux, iOS, Android) https://www.libsdl.org
+    imgui_impl_sdl2.cpp       ; SDL2 (Windows, macOS, Linux, iOS, Android) https://www.libsdl.org
     imgui_impl_win32.cpp      ; Win32 native API (Windows)
     imgui_impl_glut.cpp       ; GLUT/FreeGLUT (this is prehistoric software and absolutely not recommended today!)
 
@@ -83,8 +83,8 @@ List of high-level Frameworks Backends (combining Platform + Renderer):
 
     imgui_impl_allegro5.cpp
 
-Emscripten is also supported.
-The [example_emscripten_opengl3](https://github.com/ocornut/imgui/tree/master/examples/example_emscripten_opengl3) app uses imgui_impl_sdl.cpp + imgui_impl_opengl3.cpp, but other combos are possible.
+Emscripten is also supported!
+The SDL+GL, GLFW+GL and SDL+WebGPU examples are all ready to build and run with Emscripten.
 
 ### Backends for third-party frameworks, graphics API or other languages
 
@@ -97,7 +97,7 @@ If you are not sure which backend to use, the recommended platform/frameworks fo
 |Library |Website |Backend |Note |
 |--------|--------|--------|-----|
 | GLFW | https://github.com/glfw/glfw | imgui_impl_glfw.cpp | |
-| SDL2 | https://www.libsdl.org | imgui_impl_sdl.cpp | |
+| SDL2 | https://www.libsdl.org | imgui_impl_sdl2.cpp | |
 | Sokol | https://github.com/floooh/sokol | [util/sokol_imgui.h](https://github.com/floooh/sokol/blob/master/util/sokol_imgui.h) | Lower-level than GLFW/SDL |
 
 

docs/CHANGELOG.txt

@@ -35,6 +35,14 @@ HOW TO UPDATE?
  VERSION 1.89.3 (In Progress)
 -----------------------------------------------------------------------
 
+Breaking Changes:
+
+- Backends+Examples: SDL2: renamed all unnumbered references to "sdl" to "sdl2".
+  This is in prevision for the future release of SDL3 (#6146)
+  - imgui_impl_sdl.cpp -> imgui_impl_sdl2.cpp
+  - imgui_impl_sdl.h   -> imgui_impl_sdl2.h
+  - example_sdl_xxxx/  -> example_sdl2_xxxx/ (folders and projects)
+
 All changes:
 
 - Inputs, Scrolling: Made horizontal scroll wheel and horizontal scroll direction consistent
@@ -83,12 +91,12 @@ All changes:
   hasPreciseScrollingDeltas==false (e.g. non-Apple mices).
 - Backends: Win32: flipping WM_MOUSEHWHEEL value to match other backends and
   offer consistent horizontal scrolling direction. (#4019)
-- Backends: SDL: flipping SDL_MOUSEWHEEL 'wheel.x' value to match other backends and
+- Backends: SDL2: flipping SDL_MOUSEWHEEL 'wheel.x' value to match other backends and
   offer consistent horizontal scrolling direction. (#4019)
-- Backends: SDL: Removed SDL_MOUSEWHEEL value clamping. (#4019, #6096, #6081)
-- Backends: SDL: Added support for SDL 2.0.18+ preciseX/preciseY mouse wheel data
+- Backends: SDL2: Removed SDL_MOUSEWHEEL value clamping. (#4019, #6096, #6081)
+- Backends: SDL2: Added support for SDL 2.0.18+ preciseX/preciseY mouse wheel data
   for smooth scrolling as reported by SDL. (#4019, #6096)
-- Backends: SDL: Avoid calling SDL_SetCursor() when cursor has not changed, as the function
+- Backends: SDL2: Avoid calling SDL_SetCursor() when cursor has not changed, as the function
   is surprisingly costly on Mac with latest SDL (may be fixed in next SDL version). (#6113)
 - Backends: GLFW: Registering custom low-level mouse wheel handler to get more accurate
   scrolling impulses on Emscripten. (#4019, #6096) [@ocornut, @wolfpld, @tolopolarity]
@@ -97,13 +105,13 @@ All changes:
   the 'window' parameter. (#6142)
 - Backends: WebGPU: Fix building for latest WebGPU specs (remove implicit layout generation).
   (#6117, #4116, #3632) [@tonygrue, @bfierz]
-- Examples: refactored SDL+GL and GLFW+GL examples to compile with Emscripten.
+- Examples: refactored SDL2+GL and GLFW+GL examples to compile with Emscripten.
   (#2492, #2494, #3699, #3705) [@ocornut, @nicolasnoble]
   The dedicated example_emscripten_opengl3/ has been removed.
 - Examples: Win32: Fixed examples using RegisterClassW() since 1.89 to also call
   DefWindowProcW() instead of DefWindowProc() so that title text are correctly converted
   when application is compiled without /DUNICODE. (#5725, #5961, #5975) [@markreidvfx]
-- Examples: SDL+SDL_Renderer: Added call to SDL_RenderSetScale() to display is correct on a
+- Examples: SDL2+SDL_Renderer: Added call to SDL_RenderSetScale() to display is correct on a
   Retina display (albeit lower-res as our other unmodified examples). (#6121, #6065, #5931).
 
 

docs/EXAMPLES.md

@@ -107,7 +107,7 @@ OSX + OpenGL2 example. <BR>
 [example_emscripten_wgpu/](https://github.com/ocornut/imgui/blob/master/examples/example_emscripten_wgpu/) <BR>
 Emcripten + GLFW + WebGPU example. <BR>
 = main.cpp + imgui_impl_glfw.cpp + imgui_impl_wgpu.cpp
-Note that the 'example_glfw_opengl3' and 'example_sdl_opengl3' examples also supports Emscripten!
+Note that the 'example_glfw_opengl3' and 'example_sdl2_opengl3' examples also supports Emscripten!
 
 [example_glfw_metal/](https://github.com/ocornut/imgui/blob/master/examples/example_glfw_metal/) <BR>
 GLFW (Mac) + Metal example. <BR>
@@ -146,40 +146,40 @@ Null example, compile and link imgui, create context, run headless with no input
 This is used to quickly test compilation of core imgui files in as many setups as possible.
 Because this application doesn't create a window nor a graphic context, there's no graphics output.
 
-[example_sdl_directx11/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl_directx11/) <BR>
+[example_sdl2_directx11/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl2_directx11/) <BR>
 SDL2 + DirectX11 example, Windows only. <BR>
-= main.cpp + imgui_impl_sdl.cpp + imgui_impl_dx11.cpp <BR>
-This to demonstrate usage of DirectX with SDL.
+= main.cpp + imgui_impl_sdl2.cpp + imgui_impl_dx11.cpp <BR>
+This to demonstrate usage of DirectX with SDL2.
 
-[example_sdl_metal/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl_metal/) <BR>
-SDL2 (Mac) + Metal example. <BR>
-= main.mm + imgui_impl_sdl.cpp + imgui_impl_metal.mm
+[example_sdl2_metal/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl2_metal/) <BR>
+SDL2 + Metal example, Mac only. <BR>
+= main.mm + imgui_impl_sdl2.cpp + imgui_impl_metal.mm
 
-[example_sdl_opengl2/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl_opengl2/) <BR>
+[example_sdl2_opengl2/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl2_opengl2/) <BR>
 SDL2 (Win32, Mac, Linux etc.) + OpenGL example (legacy, fixed pipeline). <BR>
-= main.cpp + imgui_impl_sdl.cpp + imgui_impl_opengl2.cpp <BR>
+= main.cpp + imgui_impl_sdl2.cpp + imgui_impl_opengl2.cpp <BR>
 **DO NOT USE OPENGL2 CODE IF YOUR CODE/ENGINE IS USING GL OR WEBGL (SHADERS, VBO, VAO, etc.)** <BR>
 This code is mostly provided as a reference to learn about Dear ImGui integration, because it is shorter.
 If your code is using GL3+ context or any semi modern GL calls, using this renderer is likely to
 make things more complicated, will require your code to reset many GL attributes to their initial
 state, and might confuse your GPU driver. One star, not recommended.
 
-[example_sdl_opengl3/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl_opengl3/) <BR>
+[example_sdl2_opengl3/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl2_opengl3/) <BR>
 SDL2 (Win32, Mac, Linux, etc.) + OpenGL3+/ES2/ES3 example. <BR>
-= main.cpp + imgui_impl_sdl.cpp + imgui_impl_opengl3.cpp <BR>
+= main.cpp + imgui_impl_sdl2.cpp + imgui_impl_opengl3.cpp <BR>
 This uses more modern GL calls and custom shaders. <BR>
 This support building with Emscripten and targetting WebGL.<BR>
 Prefer using that if you are using modern GL or WebGL in your application.
 
-[example_sdl_sdlrenderer/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl_sdlrenderer/) <BR>
+[example_sdl2_sdlrenderer/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl2_sdlrenderer/) <BR>
 SDL2 (Win32, Mac, Linux, etc.) + SDL_Renderer (most graphics backends are supported underneath) <BR>
-= main.cpp + imgui_impl_sdl.cpp + imgui_impl_sdlrenderer.cpp <BR>
+= main.cpp + imgui_impl_sdl2.cpp + imgui_impl_sdlrenderer.cpp <BR>
 This requires SDL 2.0.18+ (released November 2021) <BR>
 We do not really recommend using SDL_Renderer as it is a rather primitive API.
 
-[example_sdl_vulkan/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl_vulkan/) <BR>
+[example_sdl2_vulkan/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl2_vulkan/) <BR>
 SDL2 (Win32, Mac, Linux, etc.) + Vulkan example. <BR>
-= main.cpp + imgui_impl_sdl.cpp + imgui_impl_vulkan.cpp <BR>
+= main.cpp + imgui_impl_sdl2.cpp + imgui_impl_vulkan.cpp <BR>
 This is quite long and tedious, because: Vulkan. <BR>
 For this example, the main.cpp file exceptionally use helpers function from imgui_impl_vulkan.h/cpp.