class Phantom::SVG::Parser::GIFReader
GIF reader.
Public Instance Methods
read(path, _options = {})
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Read gif file from path.
# File lib/phantom/parser/gif_reader.rb, line 16 def read(path, _options = {}) reset return if path.nil? || path.empty? frames = create_frames(path) @frames += frames @width = "#{frames.first.width}" @height = "#{frames.first.height}" @loops = 0 @skip_first = frames[0].duration == 0.0 @has_animation = true end
Private Instance Methods
create_frames(path, _duration = nil)
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Create frames for each frame in the gif.
# File lib/phantom/parser/gif_reader.rb, line 33 def create_frames(path, _duration = nil) frames = [] lst = ImageList.new path lst = lst.coalesce lst.each do |img| frame = set_param(img) frames << frame end frames end
create_surfaces(img)
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Create surfaces.
# File lib/phantom/parser/gif_reader.rb, line 59 def create_surfaces(img) img.format = 'PNG' base64 = Base64.encode64(img.to_blob) image = REXML::Element.new('image') image.add_attributes( 'width' => img.columns, 'height' => img.rows, 'xlink:href' => "data:image/png;base64,#{base64}" ) [image] end
set_param(img)
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# File lib/phantom/parser/gif_reader.rb, line 46 def set_param(img) frame = Phantom::SVG::Frame.new frame.width = "#{img.columns}px" frame.height = "#{img.rows}px" frame.viewbox.set_from_text("0 0 #{img.columns} #{img.rows}") frame.surfaces = create_surfaces(img) frame.duration = img.delay * 0.01 unless img.delay.nil? frame.namespaces = { 'xmlns' => 'http://www.w3.org/2000/svg', 'xlink' => 'http://www.w3.org/1999/xlink' } frame end