InputRaster

Wolfram Kernel

Execution environment

Notebook`Kernel`Inputs`

Context

provides a free-drawing 2D input

InputRaster[opts___] _EventObject

provides a free-drawing over an image

InputRaster[img_Image, opts___] _EventObject

Event generation

Fires a single event on any changes on canvas with Image as a payload. For example

bufferImage = ImageData[ConstantImage[{0,0,0,0}, {350,350}], "Byte"];

EventHandler[InputRaster[ImageSize->{350,350}], Function[img,
  bufferImage = ImageData[img, "Byte"];
]]

Image[bufferImage // Offload, "Byte"]

Chaining events

One can reuse another event

InputRaster[event_EventObject, rest__]

Options

ImageSize

If no image or overlay image is provided, one can specify a size for blank canvas. By the default is 300

"OverlayImage"

Places a semitransparent image over the canvas. It comes handy when working with masks for images

"Topic"

Specifies which topic (or pattern) of an event is used. By the default is "Default"

"AllowUpdateWhileDrawing"

By the default is False. Sends new image on every change.