Class: Iup::ImageRGBA

Inherits:

ImageWidget

• Object
• Widget
• ImageWidget
• Iup::ImageRGBA

Defined in:

lib/wrapped/image.rb

Overview

Image made from RGBA values.

Example

image_data = [
  r1,g1,b1,a1,r2,g2,b2,a2, ... r20,g20,b20,a20, # 4x20 sets of RGBA values
  ... # 20 rows
]
Iup::ImageRGBA.new(20, 20, image_data)

Instance Attribute Summary

Attributes inherited from Widget

#handle

Instance Method Summary

• #initialize(width, height, pixels) {|_self| ... } ⇒ ImageRGBA constructor

  Constructor creates an image from raw pixels.

Methods inherited from ImageWidget

#assign_handle, #bpp, #channels, #height, #hotspot, #rastersize, #save, #wid, #width

Methods inherited from Widget

#active, #assign_handle, #bgcolor, #destroy, #enterwindow_cb=, #fgcolor, #font, #getfocus_cb=, #help_cb=, #k_any=, #killfocus_cb=, #leavewindow_cb=, #map_cb=, #maxsize, #minsize, #open_controls, #size, #unmap_cb=, #visible, #wid, #zorder

Methods included from AttributeBuilders

#define_attribute, #define_id_attribute, #define_id_reader, #define_id_writer, #define_property_attribute, #define_property_reader, #define_property_writer, #define_reader, #define_writer

Methods included from CallbackSetter

#define_callback

Constructor Details

#initialize(width, height, pixels) {|_self| ... } ⇒ ImageRGBA

Constructor creates an image from raw pixels. If a block is given, the new instance is yielded to it.

• width - width of image in pixels

• height - height of image in pixels

• pixels - an array of pixel values, using 4 values per pixel.

Yields:

• (_self)

Yield Parameters:

• _self (Iup::ImageRGBA) —

  the object that the method was called on

# File 'lib/wrapped/image.rb', line 171

def initialize(width, height, pixels)
  @handle = IupLib.IupImageRGBA(width, height, IupLib.pointer_from_chars(pixels))

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