Class: PSD::Renderer

Inherits:
Object
  • Object
show all
Includes:
CanvasManagement
Defined in:
lib/psd/renderer.rb,
lib/psd/renderer/mask.rb,
lib/psd/renderer/canvas.rb,
lib/psd/renderer/blender.rb,
lib/psd/renderer/mask_canvas.rb,
lib/psd/renderer/vector_shape.rb,
lib/psd/renderer/cairo_helpers.rb,
lib/psd/renderer/clipping_mask.rb,
lib/psd/renderer/canvas_management.rb

Defined Under Namespace

Modules: CairoHelpers, CanvasManagement Classes: Blender, Canvas, ClippingMask, Mask, MaskCanvas, VectorShape

Instance Method Summary collapse

Methods included from CanvasManagement

#active_canvas, #create_group_canvas, #pop_canvas, #push_canvas, #stack_inspect

Constructor Details

#initialize(node, opts = {}) ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/psd/renderer.rb', line 7

def initialize(node, opts = {})
  @root_node = node
  @opts = opts

  # Our canvas always starts as the full document size because
  # all measurements are relative to this size. We can later crop
  # the image if needed.
  @width = @root_node.document_dimensions[0].to_i
  @height = @root_node.document_dimensions[1].to_i

  @canvas_stack = []
  @node_stack = [@root_node]

  @rendered = false
end

Instance Method Details

#execute_pipeline ⇒ Object 



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# File 'lib/psd/renderer.rb', line 35

def execute_pipeline
  PSD.logger.debug "Executing pipeline on #{active_node.debug_name}"
  children.reverse.each do |child|
    # We skip over hidden nodes.
    next unless child.visible?

    if child.group?
      push_node(child)

      if child.passthru_blending?
        PSD.logger.debug "#{child.name} is a group with passthru blending"
        execute_pipeline
      else
        PSD.logger.debug "#{child.name} is a group with #{child.blending_mode} blending"
        
        create_group_canvas(child)
        execute_pipeline
        
        child_canvas = pop_canvas
        child_canvas.paint_to active_canvas
      end

      pop_node and next
    end

    canvas = Canvas.new(child, nil, nil, @opts)
    canvas.paint_to active_canvas
  end
end

#render! ⇒ Object 



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# File 'lib/psd/renderer.rb', line 23

def render!
  PSD.logger.debug "Beginning render process"

  # Create our base canvas
  create_group_canvas(active_node, active_node.width, active_node.height, base: true)

  # Begin the rendering process
  execute_pipeline

  @rendered = true
end

#to_png ⇒ Object 



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# File 'lib/psd/renderer.rb', line 65

def to_png
  render! unless @rendered
  active_canvas.canvas
end