ParallelDisplayController Class

Package: GHIElectronics.Endpoint.Devices.Display
Namespace: GHIElectronics.Endpoint.Devices.Display

The built-in display driven by the SoC's parallel RGB LCD controller (DRM "DPI" / parallel-RGB). Opens /dev/fb0 inside ParallelDisplayController.Enable, respects the real framebuffer stride, converts source pixel formats to the panel's bit depth, and blits with ParallelDisplayController.Flush.

public sealed class ParallelDisplayController : DisplayController

Constructors

ParallelDisplayController()

public ParallelDisplayController()

Properties

Height

public int Height { get; }

Returns int

IsEnabled

public bool IsEnabled { get; }

Returns bool

Width

public int Width { get; }

Returns int

Methods

Disable()

public override void Disable()

Closes /dev/fb0 and turns the parallel-RGB controller off.

Dispose()

public override void Dispose()

Calls ParallelDisplayController.Disable (best-effort - swallows any exception).

Enable()

public override void Enable()

Programs the parallel-RGB controller from /config/display.json, opens /dev/fb0, and reads the live stride and bits-per-pixel from /sys/class/graphics/fb0 (overriding the configured values if the kernel pinned a different format).

Flush(ReadOnlySpan<byte> pixels, PixelFormat format, int x, int y, int width, int height)

public override void Flush(ReadOnlySpan<byte> pixels, PixelFormat format, int x, int y, int width, int height)

Writes pixels to the region (x, y, width, height), converting from format to the framebuffer's native depth (16, 24, or 32 bpp) one row at a time.

Parameter	Type	Description
pixels	ReadOnlySpan<byte>	Source pixels in format, laid out row by row with no padding.
format	PixelFormat	Source pixel format: Rgb565, Rgb24, Rgb32 or Argb32.
x	int	Left edge of the target region in pixels.
y	int	Top edge of the target region in pixels.
width	int	Region width in pixels.
height	int	Region height in pixels.