Class: ImageRuby::Image
Class Method Summary collapse
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.from_file(path) ⇒ Object
load a image from file.
Instance Method Summary collapse
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#encode(format, output) ⇒ Object
encodes the image with the specific format writting the result to output output can be a string or a open file on binary mode.
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#initialize(width_, height_, color = nil) ⇒ Image
constructor
Create an image with the given width and height filled with the specified color (black if not specified) Also, the method allow the construction of image pixel by pixel if a block is passed.
Constructor Details
#initialize(width_, height_, color = nil) ⇒ Image
Create an image with the given width and height filled with the specified color (black if not specified) Also, the method allow the construction of image pixel by pixel if a block is passed
Examples:
image = Image.new(30,20) # creates an image of width 30, height 20 and filled with black
image = Image.new(30,20,Color.orange) # creates an image of width 30, height 20 and filled with orange
image = Image.new(30,20) {|x,y| Color.from_rgb(x*8,0,0) } # creates an image of width 30, height 20 and filled with a gradient
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# File 'lib/imageruby/image.rb', line 43 def initialize(width_, height_, color = nil) super() initialize_bitmap_representation(width_, height_, color) if block_given? (0..width_-1).each do |x_| (0..height_-1).each do |y_| set_pixel(x_,y_, yield(x_,y_) ) end end end end |
Class Method Details
.from_file(path) ⇒ Object
load a image from file
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# File 'lib/imageruby/image.rb', line 65 def self.from_file(path) FileLoader.load(path) end |
Instance Method Details
#encode(format, output) ⇒ Object
encodes the image with the specific format writting the result to output output can be a string or a open file on binary mode
To save a image to a file on disk use the method Image#save
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# File 'lib/imageruby/image.rb', line 60 def encode(format,output) Encoder.encode(self,format,output) end |