Class: Vizcore::Renderer::Snapshot

Inherits:
Object
  • Object
show all
Defined in:
lib/vizcore/renderer/snapshot.rb

Overview

Builds one analyzed scene frame and writes a PNG preview.

Instance Method Summary collapse

Constructor Details

#initialize(config:, width: SnapshotRenderer::DEFAULT_WIDTH, height: SnapshotRenderer::DEFAULT_HEIGHT) ⇒ Snapshot

Returns a new instance of Snapshot.



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# File 'lib/vizcore/renderer/snapshot.rb', line 12

def initialize(config:, width: SnapshotRenderer::DEFAULT_WIDTH, height: SnapshotRenderer::DEFAULT_HEIGHT)
  @config = config
  @width = width
  @height = height
end

Instance Method Details

#write(out:) ⇒ Hash

Returns snapshot metadata.

Parameters:

  • out (String, Pathname)

Returns:

  • (Hash) —

    snapshot metadata



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# File 'lib/vizcore/renderer/snapshot.rb', line 20

def write(out:)
  output_path = Pathname.new(out.to_s).expand_path
  frame_source = SceneFrameSource.new(config: @config)
  frame_source.start
  frame = frame_source.capture
  png = SnapshotRenderer.new(width: @width, height: @height).render(
    scene: frame.fetch(:scene),
    audio: frame.fetch(:audio)
  )

  FileUtils.mkdir_p(output_path.dirname)
  File.binwrite(output_path, png)
  { path: output_path, scene: frame.fetch(:scene_name), width: @width, height: @height }
ensure
  frame_source&.stop
end