Class: Iup::Image

Inherits:
ImageWidget show all
Defined in:
lib/wrapped/image.rb

Overview

Image made from greyscale values. For example:

 pixmap_x = [
  1,2,3,3,3,3,3,3,3,2,1, 
  2,1,2,3,3,3,3,3,2,1,2, 
  3,2,1,2,3,3,3,2,1,2,3, 
  3,3,2,1,2,3,2,1,2,3,3, 
  3,3,3,2,1,2,1,2,3,3,3, 
  3,3,3,3,2,1,2,3,3,3,3, 
  3,3,3,2,1,2,1,2,3,3,3, 
  3,3,2,1,2,3,2,1,2,3,3, 
  3,2,1,2,3,3,3,2,1,2,3, 
  2,1,2,3,3,3,3,3,2,1,2, 
  1,2,3,3,3,3,3,3,3,2,1
]

img = Image.new 11, 11, pixmap_x

Instance Attribute Summary

Attributes inherited from Widget

#handle

Instance Method Summary collapse

Methods inherited from ImageWidget

#color, #colour, #save

Methods inherited from Widget

#assign_handle, #enterwindow_cb, #getfocus_cb, #help_cb, #k_any, #killfocus_cb, #leavewindow_cb, #map_cb, #open_controls, #unmap_cb

Methods included from AttributeBuilders

#define_attribute, #define_id_attribute, #define_id_readonly, #define_id_writeonly, #define_property_attribute, #define_property_writeonly, #define_readonly, #define_writeonly

Methods included from CallbackSetter

#define_callback

Constructor Details

#initialize(width, height, pixels, &block) ⇒ Image

Constructor creates an image from raw pixels, using 1-value per pixel.

width

width of image in pixels

height

height of image in pixels

pixels

an array of pixel values

block

an optional block to set attributes



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# File 'lib/wrapped/image.rb', line 81

def initialize width, height, pixels, &block
  @handle = IupLib.IupImage width, height, IupLib.pointer_from_chars(pixels)

  # run any provided block on instance, to set up further attributes
  self.instance_eval &block if block_given?
end