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ImGui4NET.Sample.OpenGL3

English | 简体中文

A complete Dear ImGui application built directly on the raw ImGui4NET bindings: OpenTK supplies the window and the OpenGL 4.1 context, and every pixel of the UI is drawn through ImDrawList.

Dashboard

What it demonstrates

  • Bare-metal bindings — ImGui.CreateContext, ImGuiIO, ImGui.NewFrame and ImGui_ImplOpenGL3.* are called exactly as the C++ API defines them. There is no wrapper layer.
  • Custom-drawn chrome — the top bar, left rail, stat cards, sparklines, progress rings and the two-series chart are all ImDrawList primitives, so the layout does not depend on the stock widget metrics.
  • Microsoft YaHei — ShowcaseUi.LoadFonts loads msyh.ttc from the Windows font directory with the Simplified Chinese glyph range, falling back to other CJK fonts and finally to the embedded default. All text sizes are baked from that single font through the dynamic atlas added in Dear ImGui 1.92.
  • imgui_club — the Memory tab embeds MemoryEditor from ImGui4NET.Club.
  • Screenshot capture — Screenshot.Capture reads the back buffer with glReadPixels and writes a PNG, which is how the images below were produced.

Requirements

  • .NET 10 SDK
  • A GPU/driver with OpenGL 4.1
  • Windows for the Microsoft YaHei font path; other platforms fall back automatically

Running

dotnet run --project samples/ImGui4NET.Sample.OpenGL3

Press Esc to quit and F12 to save a screenshot next to the working directory.

Pages

Dashboard

Four stat cards with animated sparklines and progress rings, a live two-series throughput chart, and a table of recent CI builds.

Dashboard

Components

Custom toggle switches, sliders, a profile combo, circular gauges, an accent colour picker with a clickable palette, and a tree view. Each card is a child window so the stock widgets flow normally inside it.

Components

Memory

The imgui_club Memory Editor, driven through its pure C# port (MemoryEditor.DrawContents).

Memory

Project layout

File Purpose
Program.cs OpenTK host: context creation, per-frame input feed, render loop
ShowcaseUi.cs The whole dashboard: theme, fonts, layout, custom widgets
Screenshot.cs glReadPixels back-buffer capture to PNG