Struct DisplayParams 

pub struct DisplayParams {
    pub src_rect: Rect,
    pub src_rect_fixed: Option<FixedRect>,
    pub dst_rect: Rect,
    pub rotation: u64,
    pub alpha: Option<u16>,
    pub zpos: Option<u64>,
    pub color_primaries: Option<ColorPrimaries>,
    pub source_eotf: Option<TransferFunction>,
    pub color_encoding: Option<ColorEncoding>,
    pub color_range: Option<ColorRange>,
}

How a layer should be displayed.

Fields

src_rect: Rect

Region of the buffer to show.

A zero width or height means “the buffer’s full extent” — see lower_layer, where that resolution happens.

src_rect_fixed: Option<FixedRect>

The source crop at sub-pixel precision.

When set it takes precedence over src_rect and is written to SRC_X/Y/W/H as given; a zero width or height still means the buffer’s full extent. The composition fallback, which samples whole pixels, rounds it. None: src_rect applies.

dst_rect: Rect

Region of the CRTC to show it on.

x/y are signed: a plane may extend off-screen.

rotation: u64

Rotate and reflect bits, as a DRM_MODE_ROTATE_* / DRM_MODE_REFLECT_* mask. Zero means no rotation, and nothing is written.

alpha: Option<u16>

Per-plane alpha, if the caller set one.

zpos: Option<u64>

Stacking position, if the caller set one.

Left unset deliberately by most callers — see lower_layer for why writing a default here rather than leaving it alone is actively harmful.

color_primaries: Option<ColorPrimaries>

The container colorimetry this layer’s content is in.

Feeds the scene’s choice of connector Colorspace – the widest-gamut layer wins – and seeds the mastering primaries when the frame is HDR. None means the producer did not say, and the scene leaves the connector property alone rather than guessing.

source_eotf: Option<TransferFunction>

The transfer function the content is encoded with.

None is the SDR transfer. When any layer in a frame reports PQ or HLG the scene declares HDR on the connector.

color_encoding: Option<ColorEncoding>

The YCbCr-to-RGB matrix this layer’s pixels were encoded with: the plane’s COLOR_ENCODING.

None asks for BT.709. Only YUV formats are converted, so an RGB layer is unaffected either way; the scene still writes the value, to displace whatever the previous client left on the plane. A plane without the encoding asked for gets BT.709, or BT.601 where that is all it has.

color_range: Option<ColorRange>

Whether this layer’s YCbCr is limited or full range: the plane’s COLOR_RANGE. None asks for limited, which most camera and broadcast video is.

Implementations

impl DisplayParams

pub fn ycbcr(&self) -> Ycbcr

The YCbCr interpretation this layer asks its plane for, defaults applied.

Trait Implementations

impl Clone for DisplayParams

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for DisplayParams

impl Debug for DisplayParams

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

Formats the value using the given formatter.

impl Default for DisplayParams

fn default() -> Self

Returns the “default value” for a type.

impl Eq for DisplayParams

impl PartialEq for DisplayParams

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for DisplayParams