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                             STUMPYPNG/GIF

                              Leon Rische
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                         [2019-07-22 Mon 20:15]


Table of Contents
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1. StumpyPNG
2. StumpyGIF





1 StumpyPNG
===========

  Crystal library for reading and writing png files, with support for
  Adam7 interlacing and all kinds of color types.

  Source code on Github: [stumpycr/stumpy_png]

  ,----
  | include StumpyPNG
  |
  | canvas = Canvas.new(256, 256)
  |
  | (0...255).each do |x|
  |   (0...255).each do |y|
  |     # RGBA.from_rgb_n(values, bit_depth) is an internal helper method
  |     # that creates an RGBA object from a rgb triplet with a given bit depth
  |     color = RGBA.from_rgb_n(x, y, 255, 8)
  |     canvas[x, y] = color
  |   end
  | end
  |
  | StumpyPNG.write(canvas, "rainbow.png")
  `----


[stumpycr/stumpy_png] <https://github.com/stumpycr/stumpy_png>


2 StumpyGIF
===========

  Crystal library for creating (animated) gif files.

  Source code on Github: [stumpycr/stumpy_gif]

  <file:images/stumpy/rainbow_neuquant.gif>


[stumpycr/stumpy_gif] <https://github.com/stumpycr/stumpy_gif>