WebPDecoder class

Decode a WebP formatted image. This supports lossless (vp8l), lossy (vp8), lossy+alpha, and animated WebP images.

Inheritance

• Object
• Decoder
• WebPDecoder

Constructors

WebPDecoder([List<int>? bytes])

Properties

hashCode → int

The hash code for this object.

no setter, inherited

info → WebPInfo?

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

decodeAnimation(List<int> bytes) → Animation?

Decode all of the frames of an animated webp. For single image webps, this will return an animation with a single frame.

override

decodeFrame(int frame) → Image?

Decode a single frame from the data that was set with startDecode. If frame is out of the range of available frames, null is returned. Non animated image files will only have frame 0. An Image is returned, which provides the image, and top-left coordinates of the image, as animated frames may only occupy a subset of the canvas.

override

decodeHdrFrame(int frame) → HdrImage?

Decode a single high dynamic range (HDR) frame from the data that was set with startDecode. If the format of the file does not support HDR images, the regular image will be converted to an HDR image as (color / 255). If frame is out of the range of available frames, null is returned. Non animated image files will only have frame 0. An Image is returned, which provides the image, and top-left coordinates of the image, as animated frames may only occupy a subset of the canvas.

inherited

decodeHdrImage(List<int> bytes, {int frame = 0}) → HdrImage?

Decode the file and extract a single High Dynamic Range (HDR) image from it. HDR images are stored in floating-poing values. If the format of the file does not support HDR images, the regular image will be converted to an HDR image as (color / 255). If the file is animated, the specified frame will be decoded. If there was a problem decoding the file, null is returned.

inherited

decodeImage(List<int> bytes, {int frame = 0}) → Image?

Decode a WebP formatted file stored in bytes into an Image. If it's not a valid webp file, null is returned. If the webp file stores animated frames, only the first image will be returned. Use decodeAnimation to decode the full animation.

override

isValidFile(List<int> bytes) → bool

Is the given file a valid WebP image?

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

numFrames() → int

How many frames are available to decode?

override

startDecode(List<int> bytes) → WebPInfo?

Validate the file is a WebP image and get information about it. If the file is not a valid WebP image, null is returned.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited