Struct GlCompositor 

pub struct GlCompositor { /* private fields */ }

GPU-style compositor that manages surfaces and composites them to a back buffer.

Implementations

impl GlCompositor

pub fn new(viewport_width: u32, viewport_height: u32) -> Self

Create a new compositor with the given viewport dimensions.

pub fn set_clear_color(&mut self, color: u32)

Set the background clear colour.

pub fn width(&self) -> u32

Viewport width.

pub fn height(&self) -> u32

Viewport height.

pub fn surface_count(&self) -> usize

Number of registered surfaces.

pub fn create_surface(&mut self, width: u32, height: u32) -> Option<SurfaceId>

Create a new surface with the given dimensions.

Returns the surface ID, or None if the atlas is full.

pub fn destroy_surface(&mut self, id: SurfaceId) -> bool

Destroy a surface and free its atlas region.

pub fn update_surface(&mut self, id: SurfaceId, pixels: &[u32]) -> bool

Update a surface’s pixel data.

pixels must be exactly width * height ARGB8888 values.

pub fn set_surface_position(&mut self, id: SurfaceId, x: i32, y: i32)

Set a surface’s position.

pub fn set_surface_z_order(&mut self, id: SurfaceId, z: i32)

Set a surface’s z-order.

pub fn set_surface_visible(&mut self, id: SurfaceId, visible: bool)

Set a surface’s visibility.

pub fn set_surface_opacity(&mut self, id: SurfaceId, opacity: u8)

Set a surface’s opacity.

pub fn composite(&mut self)

Composite all visible surfaces to the back buffer.

Surfaces are drawn in z-order (lowest first). The back buffer is cleared before compositing.

pub fn present(&self) -> &[u32]

Return a reference to the composited back buffer.

pub fn get_surface(&self, id: SurfaceId) -> Option<&GlSurface>

Get a surface by ID.

pub fn get_surface_mut(&mut self, id: SurfaceId) -> Option<&mut GlSurface>

Get a mutable reference to a surface by ID.

Trait Implementations

impl Debug for GlCompositor

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.