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Example: SDL3+Metal: fixed missing multi-viewport support.

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ocornut
2026-08-06 22:02:03 +02:00
parent 6ca5197cf8
commit cf27a555ad
1 changed files with 22 additions and 2 deletions
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24
examples/example_sdl3_metal/main.mm
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@@ -62,6 +62,10 @@ int main(int, char**)
ImGuiIO& io = ImGui::GetIO(); (void)io;
io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
io.ConfigFlags |= ImGuiConfigFlags_DockingEnable; // Enable Docking
io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable; // Enable Multi-Viewport / Platform Windows
//io.ConfigViewportsNoAutoMerge = true;
//io.ConfigViewportsNoTaskBarIcon = true;
// Setup Dear ImGui style
ImGui::StyleColorsDark();
@@ -71,6 +75,15 @@ int main(int, char**)
ImGuiStyle& style = ImGui::GetStyle();
style.ScaleAllSizes(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. (in docking branch: using io.ConfigDpiScaleFonts=true automatically overrides this for every window depending on the current monitor)
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.
// When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
{
style.WindowRounding = 0.0f;
style.Colors[ImGuiCol_WindowBg].w = 1.0f;
}
// Setup Platform/Renderer backends
ImGui_ImplMetal_Init(layer.device);
@@ -97,7 +110,7 @@ int main(int, char**)
// Our state
bool show_demo_window = true;
bool show_another_window = false;
float clear_color[4] = { 0.45f, 0.55f, 0.60f, 1.00f };
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
bool done = false;
@@ -135,7 +148,7 @@ int main(int, char**)
id<CAMetalDrawable> drawable = [layer nextDrawable];
id<MTLCommandBuffer> commandBuffer = [commandQueue commandBuffer];
renderPassDescriptor.colorAttachments[0].clearColor = MTLClearColorMake(clear_color[0] * clear_color[3], clear_color[1] * clear_color[3], clear_color[2] * clear_color[3], clear_color[3]);
renderPassDescriptor.colorAttachments[0].clearColor = MTLClearColorMake(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
renderPassDescriptor.colorAttachments[0].texture = drawable.texture;
renderPassDescriptor.colorAttachments[0].loadAction = MTLLoadActionClear;
renderPassDescriptor.colorAttachments[0].storeAction = MTLStoreActionStore;
@@ -192,6 +205,13 @@ int main(int, char**)
[renderEncoder popDebugGroup];
[renderEncoder endEncoding];
// Update and Render additional Platform Windows
if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
{
ImGui::UpdatePlatformWindows();
ImGui::RenderPlatformWindowsDefault();
}
[commandBuffer presentDrawable:drawable];
[commandBuffer commit];
}