sugar_png    [![Build Status](https://travis-ci.org/zed-0xff/sugar_png.png?branch=master)](https://travis-ci.org/zed-0xff/sugar_png)  [![Dependency Status](https://gemnasium.com/zed-0xff/sugar_png.png)](https://gemnasium.com/zed-0xff/sugar_png)
======


Description
-----------
A pure ruby high-level PNG file creation toolkit.

(If you need a low-level PNG manipulation & analysis toolkit - take a look at [ZPNG](https://github.com/zed-0xff/zpng))

Features
--------
 * neat syntax
 * unicode text drawing support
 * 16-bit color depth support

Installation
------------
    gem install sugar_png

Examples
--------

### Hello World!
<img src="https://raw.githubusercontent.com/zed-0xff/sugar_png/master/samples/readme/hello_world.png" alt="Hello World!" title="Hello World!" align="right" />
```ruby
  SugarPNG.new do
    text "Hello World!"
    save "out.png"
  end
```

### Explicit image dimensions + bg color
<img src="https://raw.githubusercontent.com/zed-0xff/sugar_png/master/samples/readme/explicit_image_dimensions_bg_color.png" alt="Explicit image dimensions + bg color" title="Explicit image dimensions + bg color" align="right" />
```ruby
  SugarPNG.new do
    background 'red' # or :blue, or #ffee00, or :transparent (default)
    width 100
    height 50
    text "Hello World!", :color => '#ffffff'
    save "out.png"
  end
```

### Japanese text with rainbow borders, zoomed 4x
<img src="https://raw.githubusercontent.com/zed-0xff/sugar_png/master/samples/readme/japanese_text_with_rainbow_borders_zoomed_4x.png" alt="Japanese text with rainbow borders, zoomed 4x" title="Japanese text with rainbow borders, zoomed 4x" align="right" />
```ruby
  SugarPNG.new do
    border 1, :red
    border 1, :green
    border 1, :blue
    text '水水水'
    zoom 4

    save "out.png"
  end
```

### White noise
<img src="https://raw.githubusercontent.com/zed-0xff/sugar_png/master/samples/readme/white_noise.png" alt="White noise" title="White noise" align="right" />
```ruby
  SugarPNG.new do
    bg :black  # shortcut for 'background'
    fg :white  # ditto
    width  100
    height 100
    200.times{ pixel(rand(100),rand(100)) }

    save "out.png"
  end
```

### Playing with transparency & 16-bit color depth
<img src="https://raw.githubusercontent.com/zed-0xff/sugar_png/master/samples/readme/playing_with_transparency_16_bit_color_depth.png" alt="Playing with transparency & 16-bit color depth" title="Playing with transparency & 16-bit color depth" align="right" />
```ruby
  SugarPNG.new do |img|
    img.depth = 16

    100.times do |y|
      100.times do |x|
        img[x,y] = [0,65536*x/100,0,65535*y/100] # RGBA
      end
    end

    # 'export' returns PNG image data suitable for streaming to client
    # or manually saving to a file or do whatever you want 
    @data = img.export
  end
```

### Pixels can be set using Ranges, Enumerators & Arrays
<img src="https://raw.githubusercontent.com/zed-0xff/sugar_png/master/samples/readme/pixels_can_be_set_using_ranges_enumerators_arrays.png" alt="Pixels can be set using Ranges, Enumerators & Arrays" title="Pixels can be set using Ranges, Enumerators & Arrays" align="right" />
```ruby
  SugarPNG.new do |img|
    # Ranges
    img[10...50, 10..20] = :blue
    # Array + Enumerator
    img[[1,2,4,8,16,32], 0.step(50,2)] = :red
    img.zoom = 2 
  end.save("out.png")
```

License
-------
Released under the MIT License.  See the [LICENSE](https://github.com/zed-0xff/sugar_png/blob/master/LICENSE.txt) file for further details.