BufferImage class

An image object, pixel data stored in a Uint8List

Inheritance

• Object
• AbstractImage
• BufferImage

Constructors

BufferImage(dynamic width, dynamic height)

create BufferImage with specified with and height

BufferImage.raw(Uint8List data, {required int width, required int height})

Properties

buffer → Uint8List

the color data of this image

no setter

bytePerPixel → int

no setter, override

hashCode → int

The hash code for this object.

no setter, inherited

height → int

no setter, override

pixels → List<int>

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

width → int

no setter, override

Methods

clip(int newWidth, int newHeight, [int offsetX = 0, int offsetY = 0]) → void

Clip the image to newWidth & newHeight from Offset(offsetX, offsetY)

override

clipPath(Path path, {bool doAntiAlias = true}) → Future<void>

Clip this image with path, use a Canvas render

copy() → BufferImage

A copy of this BufferImage

override

drawIcon(IconData icon, double size, Offset offset, Color color, [BlendMode mode = BlendMode.srcOver]) → Future<void>

drawImage(BufferImage image, Offset offset, [BlendMode mode = BlendMode.srcOver]) → void

Draw the image on this image at offset, use the mode

drawPath(Path path, Color color, {BlendMode mode = BlendMode.srcOver, PaintingStyle style = PaintingStyle.fill, double strokeWidth = 0}) → Future<void>

Draw the path on this image, use a Canvas render

drawRect(Rect rect, Color color, [BlendMode mode = BlendMode.srcOver]) → void

Draw a rect on this image with color, use the mode

override

drawText(String text, TextStyle style, Offset offset, [BlendMode mode = BlendMode.srcOver]) → Future<void>

getChannel(int x, int y, [ImageChannel? channel]) → int

override

getChannelSafe(int x, int y, [int? defaultValue, ImageChannel? channel]) → int

override

getColor(int x, int y) → Color

get the Color at Offset(x, y)

override

getColorSafe(int x, int y, [Color? defaultColor = const Color(0x00ffffff)]) → Color

get the Color at Offset(x, y) with out error

override

getImage() → Future<Image>

Get the Image Object from this image

getOffset(int x, int y) → int

inherited

inverse() → void

inverse phase

override

mask(Color color, [BlendMode mode = BlendMode.color]) → void

Mask the image with color use mode(see BlendMode)

maskImage(BufferImage image, [BlendMode mode = BlendMode.color, Point<int>? offset, int repeat = RepeatMode.repeatAll]) → void

Mask the image with another image use mode(see BlendMode)

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

resize(double ratio, [SampleMode sample = SampleMode.nearest]) → void

scale by ratio width sample

override

resizeTo(int newWidth, int newHeight, [SampleMode sample = SampleMode.nearest]) → void

scale to specified size (newWidth and newHeight) with sample

override

rotate(double radian, {bool isAntialias = true, SampleMode sample = SampleMode.bilinear, Color bgColor = const Color.fromARGB(0, 255, 255, 255), bool isClip = false}) → void

Rotate image by the specified radian, The blank area is filled with the specified bgColor If isClip, hold the old width & height (clip the image data out of canvas) Else adjust the canvas to fit the rotated image isAntialias not implemented

override

scaleDown(double scale) → void

zoom out an image. calc the avg channels of the colors in area as the new color

override

setChannel(int x, int y, int value, [ImageChannel? channel]) → void

override

setChannelSafe(int x, int y, int value, [ImageChannel? channel]) → void

override

setColor(int x, int y, Color color) → void

set the Color at Offset(x, y)

override

setColorSafe(int x, int y, Color color) → void

set Color at Offset(x, y) without error

override

toGray([GrayScale? grayScale]) → GrayImage

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

fromFile(Uint8List fileData) → Future<BufferImage?>

load image from a image fileData use system codec(decodeImageFromList)

fromGray(GrayImage grayImage) → BufferImage

fromImage(Image image) → Future<BufferImage>

load data from an Image