Struct GpuContext 

pub struct GpuContext {
    pub device: Device,
    pub queue: Queue,
    pub color_texture: Texture,
    pub color_view: TextureView,
    pub width: u32,
    pub height: u32,
}

An initialised headless GPU context: device, queue, and an offscreen colour texture (plus its view) sized to the requested surface.

No window or swap-chain surface is involved — rendering goes to the offscreen texture, which can then be read back to CPU memory with crate::gpu::renderer’s readback path.

Fields

device: Device

The logical GPU device.

queue: Queue

The command queue for the device.

color_texture: Texture

The offscreen colour texture (RENDER_ATTACHMENT | COPY_SRC).

color_view: TextureView

A default view over color_texture.

width: u32

Target width in physical pixels.

height: u32

Target height in physical pixels.

Implementations

impl GpuContext

pub fn headless(width: u32, height: u32) -> Result<Self, UiError>

Initialise a headless GPU context with an offscreen target of width × height pixels.

Errors

• UiError::Unsupported — no GPU adapter is available (the caller should treat this as “skip”, not a hard failure), or the requested target dimensions are zero.
• UiError::Backend — the adapter was found but the device request failed.