Class: Skia::PictureRecorder

Inherits:
Object
  • Object
show all
Defined in:
lib/skia/picture.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PictureRecorder

Returns a new instance of PictureRecorder.

Raises:



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# File 'lib/skia/picture.rb', line 65

def initialize
  @ptr = Native.sk_picture_recorder_new
  raise Error, "Failed to create picture recorder" if @ptr.nil? || @ptr.null?

  @recording = false
end

Instance Method Details

#begin_recording(bounds) ⇒ Object

Raises:



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# File 'lib/skia/picture.rb', line 76

def begin_recording(bounds)
  bounds_struct = bounds.to_struct
  canvas_ptr = Native.sk_picture_recorder_begin_recording(@ptr, bounds_struct)
  raise Error, "Failed to begin recording" if canvas_ptr.nil? || canvas_ptr.null?

  @recording = true
  canvas = Canvas.new(canvas_ptr)

  if block_given?
    yield canvas
    end_recording
  else
    canvas
  end
end

#delete ⇒ Object 



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# File 'lib/skia/picture.rb', line 115

def delete
  Native.sk_picture_recorder_delete(@ptr) if @ptr
  @ptr = nil
end

#end_recording ⇒ Object

Raises:



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# File 'lib/skia/picture.rb', line 101

def end_recording
  return nil unless @recording

  ptr = Native.sk_picture_recorder_end_recording(@ptr)
  @recording = false
  raise Error, "Failed to end recording" if ptr.nil? || ptr.null?

  Picture.new(ptr)
end

#ptr ⇒ Object 



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# File 'lib/skia/picture.rb', line 72

def ptr
  @ptr
end

#recording? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/skia/picture.rb', line 111

def recording?
  @recording
end

#recording_canvas ⇒ Object 



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# File 'lib/skia/picture.rb', line 92

def recording_canvas
  return nil unless @recording

  canvas_ptr = Native.sk_picture_get_recording_canvas(@ptr)
  return nil if canvas_ptr.nil? || canvas_ptr.null?

  Canvas.new(canvas_ptr)
end