Merge branch 'master' into docking

# Conflicts:
#	backends/imgui_impl_glfw.cpp
#	backends/imgui_impl_sdl.cpp

backends/imgui_impl_glfw.cpp

@@ -21,6 +21,7 @@
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
 //  2022-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
+//  2022-02-07: Added ImGui_ImplGlfw_InstallCallbacks()/ImGui_ImplGlfw_RestoreCallbacks() helpers to facilitate user installing callbacks after iniitializing backend.
 //  2022-01-26: Inputs: replaced short-lived io.AddKeyModsEvent() (added two weeks ago)with io.AddKeyEvent() using ImGuiKey_ModXXX flags. Sorry for the confusion.
 //  2021-01-20: Inputs: calling new io.AddKeyAnalogEvent() for gamepad support, instead of writing directly to io.NavInputs[].
 //  2022-01-17: Inputs: calling new io.AddMousePosEvent(), io.AddMouseButtonEvent(), io.AddMouseWheelEvent() API (1.87+).
@@ -110,6 +111,7 @@ struct ImGui_ImplGlfw_Data
     double                  Time;
     GLFWwindow*             MouseWindow;
     GLFWcursor*             MouseCursors[ImGuiMouseCursor_COUNT];
+    ImVec2                  LastValidMousePos;
     GLFWwindow*             KeyOwnerWindows[GLFW_KEY_LAST];
     bool                    InstalledCallbacks;
     bool                    WantUpdateMonitors;
@@ -374,8 +376,11 @@ void ImGui_ImplGlfw_CursorPosCallback(GLFWwindow* window, double x, double y)
         y += window_y;
     }
     io.AddMousePosEvent((float)x, (float)y);
+    bd->LastValidMousePos = ImVec2((float)x, (float)y);
 }
 
+// Workaround: X11 seems to send spurious Leave/Enter events which would make us lose our position,
+// so we back it up and restore on Leave/Enter (see https://github.com/ocornut/imgui/issues/4984)
 void ImGui_ImplGlfw_CursorEnterCallback(GLFWwindow* window, int entered)
 {
     ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
@@ -384,9 +389,13 @@ void ImGui_ImplGlfw_CursorEnterCallback(GLFWwindow* window, int entered)
 
     ImGuiIO& io = ImGui::GetIO();
     if (entered)
-        bd->MouseWindow = window;
-    if (!entered && bd->MouseWindow == window)
     {
+        bd->MouseWindow = window;
+        io.AddMousePosEvent(bd->LastValidMousePos.x, bd->LastValidMousePos.y);
+    }
+    else if (!entered && bd->MouseWindow == window)
+    {
+        bd->LastValidMousePos = io.MousePos;
         bd->MouseWindow = NULL;
         io.AddMousePosEvent(-FLT_MAX, -FLT_MAX);
     }
@@ -408,6 +417,48 @@ void ImGui_ImplGlfw_MonitorCallback(GLFWmonitor*, int)
     bd->WantUpdateMonitors = true;
 }
 
+void ImGui_ImplGlfw_InstallCallbacks(GLFWwindow* window)
+{
+    ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
+    IM_ASSERT(bd->InstalledCallbacks == false && "Callbacks already installed!");
+    IM_ASSERT(bd->Window == window);
+
+    bd->PrevUserCallbackWindowFocus = glfwSetWindowFocusCallback(window, ImGui_ImplGlfw_WindowFocusCallback);
+    bd->PrevUserCallbackCursorEnter = glfwSetCursorEnterCallback(window, ImGui_ImplGlfw_CursorEnterCallback);
+    bd->PrevUserCallbackCursorPos = glfwSetCursorPosCallback(window, ImGui_ImplGlfw_CursorPosCallback);
+    bd->PrevUserCallbackMousebutton = glfwSetMouseButtonCallback(window, ImGui_ImplGlfw_MouseButtonCallback);
+    bd->PrevUserCallbackScroll = glfwSetScrollCallback(window, ImGui_ImplGlfw_ScrollCallback);
+    bd->PrevUserCallbackKey = glfwSetKeyCallback(window, ImGui_ImplGlfw_KeyCallback);
+    bd->PrevUserCallbackChar = glfwSetCharCallback(window, ImGui_ImplGlfw_CharCallback);
+    bd->PrevUserCallbackMonitor = glfwSetMonitorCallback(ImGui_ImplGlfw_MonitorCallback);
+    bd->InstalledCallbacks = true;
+}
+
+void ImGui_ImplGlfw_RestoreCallbacks(GLFWwindow* window)
+{
+    ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
+    IM_ASSERT(bd->InstalledCallbacks == true && "Callbacks not installed!");
+    IM_ASSERT(bd->Window == window);
+
+    glfwSetWindowFocusCallback(window, bd->PrevUserCallbackWindowFocus);
+    glfwSetCursorEnterCallback(window, bd->PrevUserCallbackCursorEnter);
+    glfwSetCursorPosCallback(window, bd->PrevUserCallbackCursorPos);
+    glfwSetMouseButtonCallback(window, bd->PrevUserCallbackMousebutton);
+    glfwSetScrollCallback(window, bd->PrevUserCallbackScroll);
+    glfwSetKeyCallback(window, bd->PrevUserCallbackKey);
+    glfwSetCharCallback(window, bd->PrevUserCallbackChar);
+    glfwSetMonitorCallback(bd->PrevUserCallbackMonitor);
+    bd->InstalledCallbacks = false;
+    bd->PrevUserCallbackWindowFocus = NULL;
+    bd->PrevUserCallbackCursorEnter = NULL;
+    bd->PrevUserCallbackCursorPos = NULL;
+    bd->PrevUserCallbackMousebutton = NULL;
+    bd->PrevUserCallbackScroll = NULL;
+    bd->PrevUserCallbackKey = NULL;
+    bd->PrevUserCallbackChar = NULL;
+    bd->PrevUserCallbackMonitor = NULL;
+}
+
 static bool ImGui_ImplGlfw_Init(GLFWwindow* window, bool install_callbacks, GlfwClientApi client_api)
 {
     ImGuiIO& io = ImGui::GetIO();
@@ -456,25 +507,8 @@ static bool ImGui_ImplGlfw_Init(GLFWwindow* window, bool install_callbacks, Glfw
     glfwSetErrorCallback(prev_error_callback);
 
     // Chain GLFW callbacks: our callbacks will call the user's previously installed callbacks, if any.
-    bd->PrevUserCallbackWindowFocus = NULL;
-    bd->PrevUserCallbackCursorEnter = NULL;
-    bd->PrevUserCallbackMousebutton = NULL;
-    bd->PrevUserCallbackScroll = NULL;
-    bd->PrevUserCallbackKey = NULL;
-    bd->PrevUserCallbackChar = NULL;
-    bd->PrevUserCallbackMonitor = NULL;
     if (install_callbacks)
-    {
+        ImGui_ImplGlfw_InstallCallbacks(window);
-        bd->InstalledCallbacks = true;
-        bd->PrevUserCallbackWindowFocus = glfwSetWindowFocusCallback(window, ImGui_ImplGlfw_WindowFocusCallback);
-        bd->PrevUserCallbackCursorEnter = glfwSetCursorEnterCallback(window, ImGui_ImplGlfw_CursorEnterCallback);
-        bd->PrevUserCallbackCursorPos = glfwSetCursorPosCallback(window, ImGui_ImplGlfw_CursorPosCallback);
-        bd->PrevUserCallbackMousebutton = glfwSetMouseButtonCallback(window, ImGui_ImplGlfw_MouseButtonCallback);
-        bd->PrevUserCallbackScroll = glfwSetScrollCallback(window, ImGui_ImplGlfw_ScrollCallback);
-        bd->PrevUserCallbackKey = glfwSetKeyCallback(window, ImGui_ImplGlfw_KeyCallback);
-        bd->PrevUserCallbackChar = glfwSetCharCallback(window, ImGui_ImplGlfw_CharCallback);
-        bd->PrevUserCallbackMonitor = glfwSetMonitorCallback(ImGui_ImplGlfw_MonitorCallback);
-    }
 
     // Update monitors the first time (note: monitor callback are broken in GLFW 3.2 and earlier, see github.com/glfw/glfw/issues/784)
     ImGui_ImplGlfw_UpdateMonitors();
@@ -517,16 +551,7 @@ void ImGui_ImplGlfw_Shutdown()
     ImGui_ImplGlfw_ShutdownPlatformInterface();
 
     if (bd->InstalledCallbacks)
-    {
+        ImGui_ImplGlfw_RestoreCallbacks(bd->Window);
-        glfwSetWindowFocusCallback(bd->Window, bd->PrevUserCallbackWindowFocus);
-        glfwSetCursorEnterCallback(bd->Window, bd->PrevUserCallbackCursorEnter);
-        glfwSetCursorPosCallback(bd->Window, bd->PrevUserCallbackCursorPos);
-        glfwSetMouseButtonCallback(bd->Window, bd->PrevUserCallbackMousebutton);
-        glfwSetScrollCallback(bd->Window, bd->PrevUserCallbackScroll);
-        glfwSetKeyCallback(bd->Window, bd->PrevUserCallbackKey);
-        glfwSetCharCallback(bd->Window, bd->PrevUserCallbackChar);
-        glfwSetMonitorCallback(bd->PrevUserCallbackMonitor);
-    }
 
     for (ImGuiMouseCursor cursor_n = 0; cursor_n < ImGuiMouseCursor_COUNT; cursor_n++)
         glfwDestroyCursor(bd->MouseCursors[cursor_n]);
@@ -575,6 +600,7 @@ static void ImGui_ImplGlfw_UpdateMouseData()
                     mouse_x += window_x;
                     mouse_y += window_y;
                 }
+                bd->LastValidMousePos = ImVec2((float)mouse_x, (float)mouse_y);
                 io.AddMousePosEvent((float)mouse_x, (float)mouse_y);
             }
         }

backends/imgui_impl_glfw.h

@@ -34,9 +34,13 @@ IMGUI_IMPL_API bool     ImGui_ImplGlfw_InitForOther(GLFWwindow* window, bool ins
 IMGUI_IMPL_API void     ImGui_ImplGlfw_Shutdown();
 IMGUI_IMPL_API void     ImGui_ImplGlfw_NewFrame();
 
-// GLFW callbacks
+// GLFW callbacks (installer)
-// - When calling Init with 'install_callbacks=true': GLFW callbacks will be installed for you. They will call user's previously installed callbacks, if any.
+// - When calling Init with 'install_callbacks=true': ImGui_ImplGlfw_InstallCallbacks() is called. GLFW callbacks will be installed for you. They will chain-call user's previously installed callbacks, if any.
-// - When calling Init with 'install_callbacks=false': GLFW callbacks won't be installed. You will need to call those function yourself from your own GLFW callbacks.
+// - When calling Init with 'install_callbacks=false': GLFW callbacks won't be installed. You will need to call individual function yourself from your own GLFW callbacks.
+IMGUI_IMPL_API void     ImGui_ImplGlfw_InstallCallbacks(GLFWwindow* window);
+IMGUI_IMPL_API void     ImGui_ImplGlfw_RestoreCallbacks(GLFWwindow* window);
+
+// GLFW callbacks (individual callbacks to call if you didn't install callbacks)
 IMGUI_IMPL_API void     ImGui_ImplGlfw_WindowFocusCallback(GLFWwindow* window, int focused);        // Since 1.84
 IMGUI_IMPL_API void     ImGui_ImplGlfw_CursorEnterCallback(GLFWwindow* window, int entered);        // Since 1.84
 IMGUI_IMPL_API void     ImGui_ImplGlfw_CursorPosCallback(GLFWwindow* window, double x, double y);   // Since 1.87

backends/imgui_impl_opengl3.cpp

@@ -110,7 +110,11 @@
 
 // GL includes
 #if defined(IMGUI_IMPL_OPENGL_ES2)
-#include <GLES2/gl2.h>
+#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV))
+#include <OpenGLES/ES2/gl.h>    // Use GL ES 2
+#else
+#include <GLES2/gl2.h>          // Use GL ES 2
+#endif
 #if defined(__EMSCRIPTEN__)
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES

backends/imgui_impl_osx.mm

@@ -25,6 +25,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
+//  2022-02-07: Inputs: Forward keyDown/keyUp events to OS when unused by dear imgui.
 //  2022-01-31: Fix building with old Xcode versions that are missing gamepad features.
 //  2022-01-26: Inputs: replaced short-lived io.AddKeyModsEvent() (added two weeks ago)with io.AddKeyEvent() using ImGuiKey_ModXXX flags. Sorry for the confusion.
 //  2021-01-20: Inputs: calling new io.AddKeyAnalogEvent() for gamepad support, instead of writing directly to io.NavInputs[].
@@ -133,7 +134,8 @@ static double GetMachAbsoluteTimeInSeconds()
 
 - (void)keyDown:(NSEvent*)event
 {
-    ImGui_ImplOSX_HandleEvent(event, self);
+    if (!ImGui_ImplOSX_HandleEvent(event, self))
+        [super keyDown:event];
 
     // Call to the macOS input manager system.
     [self interpretKeyEvents:@[event]];
@@ -141,7 +143,8 @@ static double GetMachAbsoluteTimeInSeconds()
 
 - (void)keyUp:(NSEvent*)event
 {
-    ImGui_ImplOSX_HandleEvent(event, self);
+    if (!ImGui_ImplOSX_HandleEvent(event, self))
+        [super keyUp:event];
 }
 
 - (void)insertText:(id)aString replacementRange:(NSRange)replacementRange

backends/imgui_impl_sdl.cpp

@@ -21,6 +21,7 @@
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
 //  2022-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
+//  2022-02-04: Added SDL_Renderer* parameter to ImGui_ImplSDL2_InitForSDLRenderer(), so we can use SDL_GetRendererOutputSize() instead of SDL_GL_GetDrawableSize() when bound to a SDL_Renderer.
 //  2022-01-26: Inputs: replaced short-lived io.AddKeyModsEvent() (added two weeks ago)with io.AddKeyEvent() using ImGuiKey_ModXXX flags. Sorry for the confusion.
 //  2021-01-20: Inputs: calling new io.AddKeyAnalogEvent() for gamepad support, instead of writing directly to io.NavInputs[].
 //  2022-01-17: Inputs: calling new io.AddMousePosEvent(), io.AddMouseButtonEvent(), io.AddMouseWheelEvent() API (1.87+).
@@ -90,6 +91,7 @@ static const Uint32 SDL_WINDOW_VULKAN = 0x10000000;
 struct ImGui_ImplSDL2_Data
 {
     SDL_Window*     Window;
+    SDL_Renderer*   Renderer;
     Uint64          Time;
     Uint32          MouseWindowID;
     int             MouseButtonsDown;
@@ -344,7 +346,7 @@ bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event)
     return false;
 }
 
-static bool ImGui_ImplSDL2_Init(SDL_Window* window, void* sdl_gl_context)
+static bool ImGui_ImplSDL2_Init(SDL_Window* window, SDL_Renderer* renderer, void* sdl_gl_context)
 {
     ImGuiIO& io = ImGui::GetIO();
     IM_ASSERT(io.BackendPlatformUserData == NULL && "Already initialized a platform backend!");
@@ -376,6 +378,7 @@ static bool ImGui_ImplSDL2_Init(SDL_Window* window, void* sdl_gl_context)
 #endif
 
     bd->Window = window;
+    bd->Renderer = renderer;
     bd->MouseCanUseGlobalState = mouse_can_use_global_state;
 
     io.SetClipboardTextFn = ImGui_ImplSDL2_SetClipboardText;
@@ -426,7 +429,7 @@ static bool ImGui_ImplSDL2_Init(SDL_Window* window, void* sdl_gl_context)
 
 bool ImGui_ImplSDL2_InitForOpenGL(SDL_Window* window, void* sdl_gl_context)
 {
-    return ImGui_ImplSDL2_Init(window, sdl_gl_context);
+    return ImGui_ImplSDL2_Init(window, NULL, sdl_gl_context);
 }
 
 bool ImGui_ImplSDL2_InitForVulkan(SDL_Window* window)
@@ -434,7 +437,7 @@ bool ImGui_ImplSDL2_InitForVulkan(SDL_Window* window)
 #if !SDL_HAS_VULKAN
     IM_ASSERT(0 && "Unsupported");
 #endif
-    if (!ImGui_ImplSDL2_Init(window, NULL))
+    if (!ImGui_ImplSDL2_Init(window, NULL, NULL))
         return false;
     ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
     bd->UseVulkan = true;
@@ -446,17 +449,17 @@ bool ImGui_ImplSDL2_InitForD3D(SDL_Window* window)
 #if !defined(_WIN32)
     IM_ASSERT(0 && "Unsupported");
 #endif
-    return ImGui_ImplSDL2_Init(window, NULL);
+    return ImGui_ImplSDL2_Init(window, NULL, NULL);
 }
 
 bool ImGui_ImplSDL2_InitForMetal(SDL_Window* window)
 {
-    return ImGui_ImplSDL2_Init(window, NULL);
+    return ImGui_ImplSDL2_Init(window, NULL, NULL);
 }
 
-bool ImGui_ImplSDL2_InitForSDLRenderer(SDL_Window* window)
+bool ImGui_ImplSDL2_InitForSDLRenderer(SDL_Window* window, SDL_Renderer* renderer)
 {
-    return ImGui_ImplSDL2_Init(window, NULL);
+    return ImGui_ImplSDL2_Init(window, renderer, NULL);
 }
 
 void ImGui_ImplSDL2_Shutdown()
@@ -648,6 +651,9 @@ void ImGui_ImplSDL2_NewFrame()
     SDL_GetWindowSize(bd->Window, &w, &h);
     if (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_MINIMIZED)
         w = h = 0;
+    if (bd->Renderer != NULL)
+        SDL_GetRendererOutputSize(bd->Renderer, &display_w, &display_h);
+    else
         SDL_GL_GetDrawableSize(bd->Window, &display_w, &display_h);
     io.DisplaySize = ImVec2((float)w, (float)h);
     if (w > 0 && h > 0)

backends/imgui_impl_sdl.h

@@ -21,13 +21,14 @@
 #include "imgui.h"      // IMGUI_IMPL_API
 
 struct SDL_Window;
+struct SDL_Renderer;
 typedef union SDL_Event SDL_Event;
 
 IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForOpenGL(SDL_Window* window, void* sdl_gl_context);
 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);
+IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForSDLRenderer(SDL_Window* window, SDL_Renderer* renderer);
 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_sdlrenderer.cpp

@@ -211,7 +211,7 @@ bool ImGui_ImplSDLRenderer_CreateFontsTexture()
     io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);   // Load as RGBA 32-bit (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory.
 
     // Upload texture to graphics system
-    bd->FontTexture = SDL_CreateTexture(bd->SDLRenderer, SDL_PIXELFORMAT_RGBA32, SDL_TEXTUREACCESS_STATIC, width, height);
+    bd->FontTexture = SDL_CreateTexture(bd->SDLRenderer, SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STATIC, width, height);
     if (bd->FontTexture == NULL)
     {
         SDL_Log("error creating texture");

docs/CHANGELOG.txt

@@ -153,6 +153,8 @@ Breaking Changes:
   - If calling ImGui_ImplGlfw_InitXXX with install_callbacks=true: nothing to do. is already done for you.
   - If calling ImGui_ImplGlfw_InitXXX with install_callbacks=false: you WILL NEED to register the GLFW callback
     using glfwSetCursorPosCallback() and forward it to the backend function ImGui_ImplGlfw_CursorPosCallback().
+- Backends: SDL: Added SDL_Renderer* parameter to ImGui_ImplSDL2_InitForSDLRenderer(), so backend can call
+  SDL_GetRendererOutputSize() to obtain framebuffer size valid for hi-dpi. (#4927) [@Clownacy]
 - Commented out redirecting functions/enums names that were marked obsolete in 1.69, 1.70, 1.71, 1.72 (March-July 2019)
   - ImGui::SetNextTreeNodeOpen()        -> use ImGui::SetNextItemOpen()
   - ImGui::GetContentRegionAvailWidth() -> use ImGui::GetContentRegionAvail().x
@@ -198,6 +200,8 @@ Other Changes:
 - Backends: GLFW: Submit mouse data using io.AddMousePosEvent(), AddMouseButtonEvent(), AddMouseWheelEvent() functions. (#4858)
 - Backends: GLFW: Retrieve mouse position using glfwSetCursorPosCallback() + fallback when focused but not hovered/captured.
 - Backends: GLFW: Submit gamepad data using io.AddKeyEvent/AddKeyAnalogEvent() functions, stopped writing to io.NavInputs[]. (#4858)
+- Backends: GLFW: Added ImGui_ImplGlfw_InstallCallbacks()/ImGui_ImplGlfw_RestoreCallbacks() helpers to facilitate user installing
+  callbacks after iniitializing backend. (#4981)
 - Backends: Win32: Submit keys using io.AddKeyEvent(). Submit keymods using io.AddKeyModsEvent() at the same time. (#2625)
 - Backends: Win32: Retrieve mouse position using WM_MOUSEMOVE/WM_MOUSELEAVE + fallback when focused but not hovered/captured.
 - Backends: Win32: Submit mouse data using io.AddMousePosEvent(), AddMouseButtonEvent(), AddMouseWheelEvent() functions. (#4858)
@@ -217,15 +221,18 @@ Other Changes:
 - Backends: OSX: Added basic Platform IME support. (#3108, #2598) [@liuliu]
 - Backends: OSX: Fix Game Controller nav mapping to use shoulder for both focusing and tweak speed. (#4759)
 - Backends: OSX: Fix building with old Xcode versions that are missing gamepad features. [@rokups]
+- Backends: OSX: Forward keyDown/keyUp events to OS when unused by Dear ImGui.
 - Backends: Android, GLUT: Submit keys using io.AddKeyEvent(). Submit keymods using io.AddKeyModsEvent() at the same time. (#2625)
 - Backends: Android, GLUT: Submit mouse data using io.AddMousePosEvent(), AddMouseButtonEvent(), AddMouseWheelEvent() functions. (#4858)
 - Backends: OpenGL3: Fixed a buffer overflow in imgui_impl_opengl3_loader.h init (added in 1.86). (#4468, #4830) [@dymk]
   It would generally not have noticeable side-effect at runtime but would be detected by runtime checkers.
+- Backends: OpenGL3: Fix OpenGL ES2 includes on Apple systems. [@rokups]
 - Backends: Metal: Added Apple Metal C++ API support. (#4824, #4746) [@luigifcruz]
   Enable with '#define IMGUI_IMPL_METAL_CPP' in your imconfig.h file.
 - Backends: Metal: Ignore ImDrawCmd where ElemCount == 0, which are normally not emitted by the library but
   can theorically be created by user code manipulating a ImDrawList. (#4857)
 - Backends: Vulkan: Added support for ImTextureID as VkDescriptorSet, add ImGui_ImplVulkan_AddTexture(). (#914) [@martty]
+- Backends: SDL_Renderer: Fix texture atlas format on big-endian hardware (#4927) [@Clownacy]
 - Backends: WebGPU: Fixed incorrect size parameters in wgpuRenderPassEncoderSetIndexBuffer() and
   wgpuRenderPassEncoderSetVertexBuffer() calls. (#4891) [@FeepsDev]
 

examples/example_sdl_sdlrenderer/main.cpp

@@ -30,7 +30,7 @@ int main(int, char**)
     }
 
     // Setup window
-    SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
+    SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
     SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+SDL_Renderer example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, window_flags);
 
     // Setup SDL_Renderer instance
@@ -56,7 +56,7 @@ int main(int, char**)
     //ImGui::StyleColorsClassic();
 
     // Setup Platform/Renderer backends
-    ImGui_ImplSDL2_InitForSDLRenderer(window);
+    ImGui_ImplSDL2_InitForSDLRenderer(window, renderer);
     ImGui_ImplSDLRenderer_Init(renderer);
 
     // Load Fonts
@@ -100,7 +100,7 @@ int main(int, char**)
 
         // Start the Dear ImGui frame
         ImGui_ImplSDLRenderer_NewFrame();
-        ImGui_ImplSDL2_NewFrame(window);
+        ImGui_ImplSDL2_NewFrame();
         ImGui::NewFrame();
 
         // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).