JpegDecoder class
Decode a jpeg encoded image.
Constructors
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- info ↔ JpegInfo?
-
getter/setter pair
- input ↔ InputBuffer?
-
getter/setter pair
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
decode(
Uint8List bytes, {int? frame}) → Image? -
Decode the file and extract a single image from it. If the file is
animated, and
frame
is specified, that particular frame will be decoded. Otherwise if the image is animated andframe
is null, the returned Image will include all frames. If there was a problem decoding the Image, null will be returned.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 haveframe
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 -
isValidFile(
Uint8List data) → bool -
Is the given file a valid JPEG image?
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
numFrames(
) → int -
How many frames are available to be decoded. startDecode should have
been called first. Non animated image files will have a single frame.
override
-
startDecode(
Uint8List bytes) → DecodeInfo? -
Start decoding the data as an animation sequence, but don't actually
process the frames until they are requested with decodeFrame.
override
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited