Pulled flat history from subversion.

[git-p4: depot-paths = "//src/png/dev/": change = 2769]

CHANGES

@@ -0,0 +1,12 @@
+== 1.1.0
+
+* Fixed bug in PNG::Canvas#each
+* Patch from Tom Werner
+  * Added PNG::Canvas#inpsect
+  * Added PNG::Canvas#to_s
+  * Added PNG::Color#to_ascii
+* Sped up PNG#to_blob with RubyInline
+
+== 1.0.0
+
+BIRTHDAY!

Manifest.txt

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+CHANGES
+Manifest.txt
+README
+Rakefile
+example/lines.rb
+example/profile.rb
+lib/png.rb
+test/test_png.rb

README

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+= png
+
+== About
+
+png is an almost-pure-ruby PNG library.  It lets you write a PNG without any C
+libraries.  It might be a bit "slow", especially if you don't have a C
+compiler.
+
+== Installing png
+
+Just install the gem:
+
+  $ sudo gem install png
+
+== Using png
+
+  require 'png'
+
+  canvas = PNG::Canvas.new 200, 200
+
+  # Set a point to a color
+  canvas[100, 100] = PNG::Color::Black
+
+  # draw an anti-aliased line
+  canvas.line 50, 50, 100, 50, PNG::Color::Blue
+
+  png = PNG.new canvas
+  png.save 'blah.png'
+

Rakefile

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+require 'rubygems'
+require 'rake'
+
+$VERBOSE = nil
+
+$spec = Gem::Specification.new do |s|
+  s.name = 'png'
+  s.version = '1.1.0'
+  s.summary = 'An almost-pure-ruby PNG library'
+  s.description = 'png allows you to write a PNG file without installing any C libraries.'
+  s.author = 'Ryan Davis'
+  s.email = 'ryand-ruby@zenspider.com'
+
+  s.has_rdoc = true
+  s.files = File.read('Manifest.txt').split($/)
+  s.require_path = 'lib'
+
+  s.add_dependency 'RubyInline', '>= 3.5.0'
+end
+
+require '../../tasks/project_defaults'
+
+# vim: syntax=Ruby

example/lines.rb

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+#!/usr/local/bin/ruby -w
+
+require 'png'
+
+canvas = PNG::Canvas.new 1024, 1024, PNG::Color::Black
+
+#canvas.each do |x, y|
+#  case x
+#  when y then
+#    canvas.point(x, y, Color::Black)
+#  when 50 then
+#    canvas.point(x, y, Color::Background)
+#  end
+#  canvas.point(x, y, Color::Green) if y = 200
+#end
+
+canvas.line  50,  50, 100,  50, PNG::Color::Blue
+canvas.line  50,  50,  50, 100, PNG::Color::Blue
+canvas.line 100,  50, 150, 100, PNG::Color::Blue
+canvas.line 100,  50, 125, 100, PNG::Color::Green # currently wrong
+canvas.line 100,  50, 200,  75, PNG::Color::Green # currently wrong
+canvas.line   0, 200, 200,   0, PNG::Color::Black
+
+png = PNG.new canvas
+png.save 'blah.png'
+`open blah.png`
+

example/profile.rb

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+require 'png'
+
+class PNGProfile
+
+  def draw
+    canvas = PNG::Canvas.new 400, 400
+    png = PNG.new canvas
+    png.to_blob
+  end
+
+end
+
+pp = PNGProfile.new
+
+10.times do pp.draw end
+

example/profile_lines.rb

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+require 'png'
+
+class PNGProfileLine
+
+  COLORS = [
+    PNG::Color::Red,
+    PNG::Color::Orange,
+    PNG::Color::Yellow,
+    PNG::Color::Green,
+    PNG::Color::Blue,
+    PNG::Color::Purple,
+  ]
+
+  def draw
+    line = 0
+    canvas = PNG::Canvas.new 100, 100
+
+    0.step 99, 10 do |x|
+      canvas.line x, 0, 99 - x, 99, COLORS[line % 6]
+      line += 1
+    end
+
+    0.step 99, 10 do |y|
+      canvas.line 0, y, 99, y, COLORS[line % 6]
+      line += 1
+    end
+
+    canvas
+  end
+
+end
+
+ppl = PNGProfileLine.new
+
+5.times do ppl.draw end
+#PNG.new(ppl.draw).save 'x.png'
+