Struct webrender_api::ImageDescriptor

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pub struct ImageDescriptor {
    pub format: ImageFormat,
    pub size: DeviceIntSize,
    pub stride: Option<i32>,
    pub offset: i32,
    pub flags: ImageDescriptorFlags,
}
Expand description

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

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§format: ImageFormat

Format of the image data.

§size: DeviceIntSize

Width and length 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.

Implementations§

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impl ImageDescriptor

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pub fn new( width: i32, height: i32, format: ImageFormat, flags: ImageDescriptorFlags, ) -> Self

Mints a new ImageDescriptor.

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pub fn compute_stride(&self) -> i32

Returns the stride, either via an explicit stride stashed on the object or by the default computation.

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pub fn compute_total_size(&self) -> i32

Computes the total size of the image, in bytes.

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pub fn full_rect(&self) -> DeviceIntRect

Computes the bounding rectangle for the image, rooted at (0, 0).

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pub fn is_opaque(&self) -> bool

Returns true if this descriptor is opaque

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pub fn allow_mipmaps(&self) -> bool

Returns true if this descriptor allows mipmaps

Trait Implementations§

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impl Clone for ImageDescriptor

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fn clone(&self) -> ImageDescriptor

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ImageDescriptor

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for ImageDescriptor

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for ImageDescriptor

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

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for ImageDescriptor

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Copy for ImageDescriptor

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impl StructuralPartialEq for ImageDescriptor

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,