Struct ImageDescriptor

pub struct ImageDescriptor {
    pub format: RawImageFormat,
    pub dimensions: (usize, usize),
    pub stride: Option<i32>,
    pub offset: i32,
    pub flags: ImageDescriptorFlags,
}

Metadata (but not storage) describing an image In WebRender.

Fields

format: RawImageFormat

Format of the image data.

dimensions: (usize, usize)

Width and height of the image data, in pixels.

stride: Option<i32>

The number of bytes from the start of one row to the next. If non-None, compute_stride will return this value, otherwise it returns width * bpp. Different source of images have different alignment constraints for rows, so the stride isn’t always equal to width * bpp.

offset: i32

Offset in bytes of the first pixel of this image in its backing buffer. This is used for tiling, wherein WebRender extracts chunks of input images in order to cache, manipulate, and render them individually. This offset tells the texture upload machinery where to find the bytes to upload for this tile. Non-tiled images generally set this to zero.

flags: ImageDescriptorFlags

Various bool flags related to this descriptor.

Trait Implementations

impl Clone for ImageDescriptor

fn clone(&self) -> ImageDescriptor

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ImageDescriptor

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

Formats the value using the given formatter.

impl Hash for ImageDescriptor

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ImageDescriptor

fn cmp(&self, other: &ImageDescriptor) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ImageDescriptor

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for ImageDescriptor

fn partial_cmp(&self, other: &ImageDescriptor) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for ImageDescriptor

impl Eq for ImageDescriptor

impl StructuralPartialEq for ImageDescriptor