XenoAtom.Terminal.UI.Graphics 3.4.1

XenoAtom.Terminal.UI.Graphics

Optional terminal image controls and presenters for XenoAtom.Terminal.UI.

This package bridges the core UI graphics display list to XenoAtom.Terminal.Graphics image encoding for Kitty, iTerm2 inline images, and Sixel. It does not depend on text shaping components such as HarfBuzz.

Usage

using XenoAtom.Terminal;
using XenoAtom.Terminal.Graphics;
using XenoAtom.Terminal.UI;
using XenoAtom.Terminal.UI.Controls;
using XenoAtom.Terminal.UI.Graphics;
using UiImageScaleMode = XenoAtom.Terminal.UI.ImageScaleMode;

var image = new Image(TerminalImageSource.FromFile("logo.png"))
{
    CellWidth = 24,
    CellHeight = 12,
    ScaleMode = UiImageScaleMode.Fit,
    PreserveAspectRatio = true,
    AccessibilityText = "Project logo",
    FallbackContent = new TextBlock("[logo]"),
};

Terminal.Run(
    image,
    _ => TerminalLoopResult.Continue,
    new TerminalRunOptions
    {
        GraphicsPresenter = new TerminalImageGraphicsPresenter(),
    });

TerminalImageGraphicsPresenter uses terminal graphics capabilities detected by XenoAtom.Terminal. It can present fullscreen apps through TerminalRunOptions.GraphicsPresenter and inline/live regions through TerminalLiveOptions.GraphicsPresenter. If no presenter is configured, graphics are disabled, or the presenter cannot select a supported protocol, the Image control renders its FallbackContent instead.

When terminal pixel metrics are unavailable, the presenter uses conservative fallback cell pixel dimensions (8×16 by default) so streamed protocols such as Sixel and iTerm2 still produce visible cell-sized images. Override TerminalImageGraphicsPresenterOptions.FallbackCellPixelWidth and FallbackCellPixelHeight if your terminal uses substantially different cell metrics.

Real-time sources can implement ITerminalRealtimeImageSource alongside TerminalImageSource. The Image control subscribes to FrameAvailable, coalesces frame notifications on the app loop, and asks the presenter to encode the latest frame. TerminalImageGraphicsPresenter.Metrics reports encode duration, payload bytes, skipped frame versions, and effective FPS.

For manual validation, force a protocol with TerminalImageGraphicsPresenterOptions.Protocol or XENOATOM_TERMINAL_GRAPHICS=sixel|kitty|iterm2 and run the app in a terminal that supports that protocol. Windows Terminal should normally be detected as Sixel; Visual Studio debug sessions that omit WT_SESSION/WT_PROFILE_ID are handled through VSAPPIDNAME/__VSAPPIDDIR. If a host still strips those signals, forcing XENOATOM_TERMINAL_GRAPHICS=sixel is the recommended validation override.

The samples/ControlsDemo app includes an Images & Graphics page that renders Assets/snow_photo.jpg and a live SkiaSharp-generated frame stream through this presenter.