Class PNG::Canvas
In: lib/PatchedPNG.rb
Parent: Object

PNG canvas

Methods

[]   []=   each   line   new   point  

Attributes

data  [R]  Raw data
height  [R]  Height of the canvas
width  [R]  Width of the canvas

Public Class methods

Public Instance methods

[](x, y)

Retrieves the color of the pixel at (x, y).

[]=(x, y, color)

Sets the color of the pixel at (x, y) to color.

each() {|x, y, color| ...}

Iterates over each pixel in the canvas.

line(x0, y0, x1, y1, color)

Draws a line using Xiaolin Wu‘s antialiasing technique.

en.wikipedia.org/wiki/Xiaolin_Wu's_line_algorithm

point(x, y, color)

Blends color onto the color at point (x, y).

[Validate]