Struct ExternalImageDesc 

pub struct ExternalImageDesc {
    pub planes: Vec<DmaBufPlane>,
    pub fourcc: Fourcc,
    pub modifier: Modifier,
}

An image that already exists, to be imported rather than allocated.

This is the first of the two requirements that exist in the HAL from day one for the sake of the DRM path. The renderer must be able to draw into images it did not allocate — buffers GBM made, or buffers another device allocated and shared — because on a split render/display SoC the display controller and the GPU are different devices with different ideas about memory layout.

Fields

planes: Vec<DmaBufPlane>

Planes making up the image. Most formats are single-plane.

fourcc: Fourcc

The DRM format code the buffer was allocated with.

modifier: Modifier

The layout the buffer was allocated with.

Modifier::INVALID is accepted only where no negotiation took place; a buffer that came out of format negotiation always carries the explicit modifier that was agreed on.

Trait Implementations

impl Debug for ExternalImageDesc

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

Formats the value using the given formatter.