Class SimpleImGuiScene

Simple class to wrap everything necessary to use ImGui inside a window. Currently this always creates a new window rather than take ownership of an existing one.

Internally this uses SDL and DirectX 11 or OpenGL 3.2. Rendering is tied to vsync.

Inheritance

System.Object

SimpleImGuiScene

Implements

System.IDisposable

Inherited Members

System.Object.ToString()

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

Namespace: ImGuiScene

Assembly: ImGuiScene.dll

Syntax

public class SimpleImGuiScene : IDisposable

Constructors

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SimpleImGuiScene(RendererFactory.RendererBackend, WindowCreateInfo, Boolean)

Creates a new window and a new renderer of the specified type, and initializes ImGUI.

Declaration

public SimpleImGuiScene(RendererFactory.RendererBackend rendererBackend, WindowCreateInfo createInfo, bool enableRenderDebugging = false)

Parameters

Type	Name	Description
RendererFactory.RendererBackend	rendererBackend
WindowCreateInfo	createInfo	Creation details for the window.
System.Boolean	enableRenderDebugging	Whether to enable debugging of the renderer internals. This will likely greatly impact performance and is not usually recommended.

Fields

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OnBuildUI

User methods invoked every ImGui frame to construct custom UIs.

Declaration

public SimpleImGuiScene.BuildUIDelegate OnBuildUI

Field Value

Type	Description
SimpleImGuiScene.BuildUIDelegate

Properties

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FramerateLimit

The method of framerate control used by the scene and renderer. The default behavior is Vsync, which is greatly recommended unless you have a specific need to change it.

Declaration

public FramerateLimit FramerateLimit { get; set; }

Property Value

Type	Description
FramerateLimit

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ImGuiIniPath

Declaration

public string ImGuiIniPath { get; set; }

Property Value

Type	Description
System.String

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OnSDLEvent

Delegate for providing user event handler methods that want to respond to SDL_Events. This is just a convenience wrapper around OnSDLEvent.

Declaration

public SimpleSDLWindow.ProcessEventDelegate OnSDLEvent { get; set; }

Property Value

Type	Description
SimpleSDLWindow.ProcessEventDelegate

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PauseWhenUnfocused

Whether rendering should be paused when the window is not active. Window events will still be processed. This should help reduce processing when the overlay is not the focus, but obviously cannot be used if you are rendering dynamic data.

Declaration

public bool PauseWhenUnfocused { get; set; }

Property Value

Type	Description
System.Boolean

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Renderer

The renderer backend being used to render into this window.

Declaration

public IRenderer Renderer { get; }

Property Value

Type	Description
IRenderer

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ShouldQuit

Whether the user application has requested the system to terminate.

Declaration

public bool ShouldQuit { get; set; }

Property Value

Type	Description
System.Boolean

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Window

The main application container window where we do all our rendering and input processing.

Declaration

public SimpleSDLWindow Window { get; }

Property Value

Type	Description
SimpleSDLWindow

Methods

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CreateOverlay(RendererFactory.RendererBackend, SDL.SDL_Scancode, Single[], Boolean)

Helper method to create a fullscreen transparent overlay that exits when pressing the specified key.

Declaration

public static SimpleImGuiScene CreateOverlay(RendererFactory.RendererBackend rendererBackend, SDL.SDL_Scancode closeOverlayKey = SDL.SDL_Scancode.SDL_SCANCODE_ESCAPE, float[] transparentColor = null, bool enableRenderDebugging = false)

Parameters

Type	Name	Description
RendererFactory.RendererBackend	rendererBackend	Which rendering backend to use.
SDL.SDL_Scancode	closeOverlayKey	Which SDL.SDL_Scancode to listen for in order to exit the scene. Defaults to SDL_SCANCODE_ESCAPE.
System.Single[]	transparentColor	A float[4] representing the background window color that will be masked as transparent. Defaults to solid black.
System.Boolean	enableRenderDebugging	Whether to enable debugging of the renderer internals. This will likely greatly impact performance and is not usually recommended.

Returns

Type	Description
SimpleImGuiScene

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Dispose()

Declaration

public void Dispose()

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Dispose(Boolean)

Declaration

protected virtual void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing

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Finalize()

Declaration

protected void Finalize()

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LoadImage(Byte[])

Loads an image from a byte array of image data and creates the corresponding texture resource.

Declaration

public TextureWrap LoadImage(byte[] imageBytes)

Parameters

Type	Name	Description
System.Byte[]	imageBytes	The raw image data

Returns

Type	Description
TextureWrap	A TextureWrap associated with the loaded texture resource, containing a handle suitable for direct use in ImGui, or null on failure.

Remarks

Currently any textures created by this method are managed automatically and exist until this class object is Disposed.

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LoadImage(String)

Loads an image from a file and creates the corresponding GPU texture.

Declaration

public TextureWrap LoadImage(string path)

Parameters

Type	Name	Description
System.String	path	The filepath to the image

Returns

Type	Description
TextureWrap	A TextureWrap associated with the loaded texture resource, containing a handle suitable for direct use in ImGui, or null on failure.

Remarks

Currently any textures created by this method are managed automatically and exist until this class object is Disposed.

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LoadImageRaw(Byte[], Int32, Int32, Int32)

Declaration

public TextureWrap LoadImageRaw(byte[] imageData, int width, int height, int numChannels = 4)

Parameters

Type	Name	Description
System.Byte[]	imageData
System.Int32	width
System.Int32	height
System.Int32	numChannels

Returns

Type	Description
TextureWrap

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Run()

Simple method to run the scene in a loop until the window is closed or the application requests an exit (via ShouldQuit)

Declaration

public void Run()

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Update()

Performs a single-frame update of ImGui and renders it to the window. This method does not check any quit conditions.

Declaration

public void Update()

Implements

System.IDisposable