backends_test for 1.92.0

backend_test/example_glfw_opengl3/main.c

@@ -43,8 +43,9 @@ int main(int argc, char *argv[])
 
   // just an extra window hint for resize
   glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE);
+  float main_scale = ImGui_ImplGlfw_GetContentScaleForMonitor(glfwGetPrimaryMonitor()); // Valid on GLFW 3.3+ only
+  window = glfwCreateWindow((int)(1280 * main_scale), (int)(800 * main_scale), "Dear ImGui GLFW+OpenGL3 example", NULL, NULL);
 
-  window = glfwCreateWindow(1024, 768, "Hello World!", NULL, NULL);
   if (!window) 
   {
     printf("Failed to create window! Terminating!\n");
@@ -72,6 +73,15 @@ int main(int argc, char *argv[])
   ioptr->ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;     // Enable Multi-Viewport / Platform Windows
 #endif
 
+
+    // Setup scaling
+    ImGuiStyle* style = igGetStyle();
+    ImGuiStyle_ScaleAllSizes(style, main_scale);        // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
+    style->FontScaleDpi = main_scale;        // Set initial font scale. (using io.ConfigDpiScaleFonts=true makes this unnecessary. We leave both here for documentation purpose)
+#if GLFW_VERSION_MAJOR >= 3 && GLFW_VERSION_MINOR >= 3
+    ioptr->ConfigDpiScaleFonts = true;          // [Experimental] Automatically overwrite style.FontScaleDpi in Begin() when Monitor DPI changes. This will scale fonts but _NOT_ scale sizes/padding for now.
+    ioptr->ConfigDpiScaleViewports = true;      // [Experimental] Scale Dear ImGui and Platform Windows when Monitor DPI changes.
+#endif
   ImGui_ImplGlfw_InitForOpenGL(window, true);
   ImGui_ImplOpenGL3_Init(glsl_version);
 

backend_test/example_sdl3_vulkan/main.c

@@ -392,8 +392,9 @@ int main(int argc, char* argv[])
 #endif
 
     // Create window with Vulkan graphics context
-    SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_VULKAN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIGH_PIXEL_DENSITY | SDL_WINDOW_HIDDEN);
+    float main_scale = SDL_GetDisplayContentScale(SDL_GetPrimaryDisplay());
-    SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL3+Vulkan example", 1280, 720, window_flags);
+    SDL_WindowFlags window_flags = SDL_WINDOW_VULKAN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIDDEN | SDL_WINDOW_HIGH_PIXEL_DENSITY;
+    SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL3+Vulkan example", (int)(1280 * main_scale), (int)(720 * main_scale), window_flags);
     if (window == NULL)
     {
         printf("Error: SDL_CreateWindow(): %s\n", SDL_GetError());
@@ -451,6 +452,10 @@ int main(int argc, char* argv[])
 
     // When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
     ImGuiStyle* style = igGetStyle();
+    ImGuiStyle_ScaleAllSizes(style, main_scale);        // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
+    style->FontScaleDpi = main_scale;        // Set initial font scale. (using io.ConfigDpiScaleFonts=true makes this unnecessary. We leave both here for documentation purpose)
+    io->ConfigDpiScaleFonts = true;          // [Experimental] Automatically overwrite style.FontScaleDpi in Begin() when Monitor DPI changes. This will scale fonts but _NOT_ scale sizes/padding for now.
+    io->ConfigDpiScaleViewports = true;      // [Experimental] Scale Dear ImGui and Platform Windows when Monitor DPI changes.
     if (io->ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
     {
         style->WindowRounding = 0.0f;

backend_test/example_sdl_opengl3/main.c

@@ -10,6 +10,10 @@
 #include <GL/gl.h>
 #include <GL/glu.h>
 
+#ifdef _WIN32
+#include <windows.h>        // SetProcessDPIAware()
+#endif
+
 #ifdef IMGUI_HAS_IMSTR
 #define igBegin igBegin_Str
 #define igSliderFloat igSliderFloat_Str
@@ -24,6 +28,9 @@ SDL_Window *window = NULL;
 
 int main(int argc, char* argv[])
 {
+#ifdef _WIN32
+    SetProcessDPIAware();
+#endif
 
   if (SDL_Init(SDL_INIT_VIDEO) < 0) {
     SDL_Log("failed to init: %s", SDL_GetError());
@@ -54,11 +61,10 @@ int main(int argc, char* argv[])
   SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
   SDL_DisplayMode current;
   SDL_GetCurrentDisplayMode(0, &current);
-  
+  float main_scale = ImGui_ImplSDL2_GetContentScaleForDisplay(0);
-  window = SDL_CreateWindow(
+  SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
-      "Hello", 0, 0, 1024, 768,
+  window = SDL_CreateWindow("Dear ImGui SDL2+OpenGL3 example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, (int)(1280 * main_scale), (int)(720 * main_scale), window_flags);
-      SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE
+ 
-      );
   if (window == NULL) {
     SDL_Log("Failed to create window: %s", SDL_GetError());
     return -1;
@@ -83,6 +89,14 @@ int main(int argc, char* argv[])
   ioptr->ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;         // Enable Multi-Viewport / Platform Windows
 #endif
   
+    // Setup scaling
+    ImGuiStyle* style = igGetStyle();
+    ImGuiStyle_ScaleAllSizes(style, main_scale);        // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
+    style->FontScaleDpi = main_scale;        // Set initial font scale. (using io.ConfigDpiScaleFonts=true makes this unnecessary. We leave both here for documentation purpose)
+    ioptr->ConfigDpiScaleFonts = true;          // [Experimental] Automatically overwrite style.FontScaleDpi in Begin() when Monitor DPI changes. This will scale fonts but _NOT_ scale sizes/padding for now.
+    ioptr->ConfigDpiScaleViewports = true;      // [Experimental] Scale Dear ImGui and Platform Windows when Monitor DPI changes.
+
+
   ImGui_ImplSDL2_InitForOpenGL(window, gl_context);
   ImGui_ImplOpenGL3_Init(glsl_version);
 

backend_test/example_sdl_vulkan/main.c

@@ -11,6 +11,10 @@
 #include <volk.h>
 #endif
 
+#ifdef _WIN32
+#include <windows.h>        // SetProcessDPIAware()
+#endif
+
 //this must be equal to that in imgui_impl_vulkan.h
 #define IMGUI_IMPL_VULKAN_MINIMUM_IMAGE_SAMPLER_POOL_SIZE   (1)     // Minimum per atlas
 
@@ -376,6 +380,9 @@ static void FramePresent(ImGui_ImplVulkanH_Window* wd)
 // Main code
 int main(int argc, char* argv[])
 {
+#ifdef _WIN32
+    SetProcessDPIAware();
+#endif
     //g_MainWindowData.ClearEnable = true;
 	//ImGui_ImplVulkanH_Window_Construct(&g_MainWindowData);
 	g_MainWindowData = *ImGui_ImplVulkanH_Window_ImGui_ImplVulkanH_Window();
@@ -391,9 +398,10 @@ int main(int argc, char* argv[])
     SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1");
 #endif
 
-    // Create window with Vulkan graphics context
+    float main_scale = ImGui_ImplSDL2_GetContentScaleForDisplay(0);
     SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_VULKAN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
-    SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+Vulkan example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, window_flags);
+    SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+Vulkan example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, (int)(1280 * main_scale), (int)(720 * main_scale), window_flags);
+    
     if (window == NULL)
     {
         printf("Error: SDL_CreateWindow(): %s\n", SDL_GetError());
@@ -445,6 +453,10 @@ int main(int argc, char* argv[])
         style->Colors[ImGuiCol_WindowBg].w = 1.0f;
     }
 
+    // Setup scaling
+    ImGuiStyle_ScaleAllSizes(style, main_scale);        // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
+    style->FontScaleDpi = main_scale;        // Set initial font scale. (using io.ConfigDpiScaleFonts=true makes this unnecessary. We leave both here for documentation purpose)
+
     // Setup Platform/Renderer backends
     ImGui_ImplSDL2_InitForVulkan(window);
     ImGui_ImplVulkan_InitInfo init_info = {};

backend_test/example_sdlgpu3/main.c

@@ -13,18 +13,22 @@
 #define igGetIO igGetIO_Nil
 
 int main() {
-    if (!SDL_Init(SDL_INIT_VIDEO)) {
+    if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMEPAD)) {
       fprintf(stderr, "Failed to init video! %s", SDL_GetError());
       return 1;
     };
     
-    SDL_Window *window = NULL;
+    float main_scale = SDL_GetDisplayContentScale(SDL_GetPrimaryDisplay());
-    window = SDL_CreateWindow("cimgui SDL3+SDL_GPU example", 1280, 720, SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIGH_PIXEL_DENSITY);
+    SDL_WindowFlags window_flags = SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIDDEN | SDL_WINDOW_HIGH_PIXEL_DENSITY;
+    SDL_Window* window = NULL;
+    window = SDL_CreateWindow("Dear ImGui SDL3+SDL_GPU example", (int)(1280 * main_scale), (int)(720 * main_scale), window_flags);
     if (window == NULL)
     {
         printf("Error: SDL_CreateWindow(): %s\n", SDL_GetError());
         return -1;
     }
+    SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
+    SDL_ShowWindow(window);
 
     // Create GPU Device
     SDL_GPUDevice* gpu_device = SDL_CreateGPUDevice(SDL_GPU_SHADERFORMAT_SPIRV | SDL_GPU_SHADERFORMAT_DXIL | SDL_GPU_SHADERFORMAT_METALLIB,true,NULL);
@@ -52,6 +56,12 @@ int main() {
     // Setup Dear ImGui style
     igStyleColorsDark(NULL);
     //igStyleColorsLight(NULL);
+    // Setup scaling
+    ImGuiStyle* style = igGetStyle();
+    ImGuiStyle_ScaleAllSizes(style, main_scale);        // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
+    style->FontScaleDpi = main_scale;        // Set initial font scale. (using io.ConfigDpiScaleFonts=true makes this unnecessary. We leave both here for documentation purpose)
+    io->ConfigDpiScaleFonts = true;          // [Experimental] Automatically overwrite style.FontScaleDpi in Begin() when Monitor DPI changes. This will scale fonts but _NOT_ scale sizes/padding for now.
+    io->ConfigDpiScaleViewports = true;      // [Experimental] Scale Dear ImGui and Platform Windows when Monitor DPI changes.
 
     // Setup Platform/Renderer backends
     ImGui_ImplSDL3_InitForSDLGPU(window);
@@ -158,7 +168,7 @@ int main() {
         if (swapchain_texture != NULL && !is_minimized)
         {
             // This is mandatory: call Imgui_ImplSDLGPU3_PrepareDrawData() to upload the vertex/index buffer!
-            Imgui_ImplSDLGPU3_PrepareDrawData(draw_data, command_buffer);
+            ImGui_ImplSDLGPU3_PrepareDrawData(draw_data, command_buffer);
 
             // Setup and start a render pass
             SDL_GPUColorTargetInfo target_info ;//= {};