doodle.java2d.effect

A BlockingQueue with finite capacity where writes always succeed.

Writes always succeed, overwriting existing values in a FIFO manner. Reads may block until a value is available. This is appropriate for interact applications, where getting the latest data is more important than getting all the data.

A Canvas is an area on the screen to which Pictures can be drawn.

Determines where the center of the canvas is located.

The Frame specifies how to create a Canvas. The idiomatic way to create a Frame is to start with Frame.default and then call the builder methods starting with with.

For example, this Frame specifies a fixed size and a background color.

Frame.default.withSize(300, 300).withBackground(Color.midnightBlue)

A Swing component (a JPanel) that can render a Doodle Picture.

The majority of the code within here runs on the Swing thread. To avoid deadlock, communication with the outside world must be mediated through concurrency safe data structures or similar means.

Utilities for rendering with Java2D

Write an animation as an animated GIF. The GIF file format doesn't support transparency to the degree we need to faithfully render Java2d images. In particular it doesn't support semi-transparent redraw. As a result we just fill with the background color on each frame, if the background is set.

Create a GUI window (a Frame in Swing parlance) around a Java2dPanel.

Determines how the Canvas handles drawing multiple Pictures. The default is to clear the Canvas with the Frame 's background color every time a new picture is rendered. Alternatively a different color can be specified. This allows one to blend together pictures while keeping a constant background.