Class: AnimateIt::Verification

Inherits:
Object
  • Object
show all
Defined in:
lib/animate_it/verification.rb

Overview

Pixel-diff harness comparing the client player with legacy filmstrip.

Defined Under Namespace

Classes: Result

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(composition:, host:, step: 10, threshold: 40.0, alpha_threshold: nil, output_dir: nil, playwright_cli: nil, props: {}, ready_timeout: 30_000) ⇒ Verification

Returns a new instance of Verification.



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# File 'lib/animate_it/verification.rb', line 16

def initialize(
  composition:,
  host:,
  step: 10,
  threshold: 40.0,
  alpha_threshold: nil,
  output_dir: nil,
  playwright_cli: nil,
  props: {},
  ready_timeout: 30_000
)
  @composition = composition
  @host = host.delete_suffix("/")
  @step = [step.to_i, 1].max
  @threshold = threshold.to_f
  @alpha_threshold = alpha_threshold.nil? ? @threshold : alpha_threshold.to_f
  @output_dir = Pathname(output_dir || Rails.root.join("tmp/animate_it/verify/#{composition.id}"))
  @playwright_cli = playwright_cli || ENV.fetch("PLAYWRIGHT_CLI_EXECUTABLE_PATH", "npx playwright")
  @props = props.to_h
  @ready_timeout = [ready_timeout.to_i, 1].max
end

Instance Attribute Details

#alpha_threshold ⇒ Object (readonly)

Returns the value of attribute alpha_threshold.



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# File 'lib/animate_it/verification.rb', line 14

def alpha_threshold
  @alpha_threshold
end

#composition ⇒ Object (readonly)

Returns the value of attribute composition.



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# File 'lib/animate_it/verification.rb', line 14

def composition
  @composition
end

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/animate_it/verification.rb', line 14

def host
  @host
end

#output_dir ⇒ Object (readonly)

Returns the value of attribute output_dir.



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# File 'lib/animate_it/verification.rb', line 14

def output_dir
  @output_dir
end

#props ⇒ Object (readonly)

Returns the value of attribute props.



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# File 'lib/animate_it/verification.rb', line 14

def props
  @props
end

#ready_timeout ⇒ Object (readonly)

Returns the value of attribute ready_timeout.



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# File 'lib/animate_it/verification.rb', line 14

def ready_timeout
  @ready_timeout
end

#step ⇒ Object (readonly)

Returns the value of attribute step.



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# File 'lib/animate_it/verification.rb', line 14

def step
  @step
end

#threshold ⇒ Object (readonly)

Returns the value of attribute threshold.



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# File 'lib/animate_it/verification.rb', line 14

def threshold
  @threshold
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/animate_it/verification.rb', line 38

def call
  require "playwright"
  FileUtils.mkdir_p(output_dir)
  results = []

  Playwright.create(playwright_cli_executable_path: @playwright_cli) do |playwright|
    browser = playwright.chromium.launch(
      headless: true,
      args: [
        "--disable-web-security",
        "--disable-lcd-text",
        "--disable-gpu-compositing",
        "--force-color-profile=srgb"
      ]
    )
    begin
      context = browser.new_context(viewport: { width: composition.width, height: composition.height })
      legacy = open_page(context, "filmstrip")
      candidate = open_page(context, "player")

      sample_frames.each do |frame|
        legacy_shot = screenshot(legacy, frame, "legacy")
        candidate_shot = screenshot(candidate, frame, "player")
        results << result_for(frame, legacy_shot, candidate_shot)
      end
    ensure
      browser&.close
    end
  end

  results
end

#sample_frames ⇒ Object 



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# File 'lib/animate_it/verification.rb', line 71

def sample_frames
  max = composition.duration_in_frames - 1
  frames = (0..max).step(step).to_a
  composition.structure_layers.each do |layer|
    [layer.from_frame, layer.to_frame].each do |edge|
      frames.push(edge - 1, edge, edge + 1)
    end
  end
  frames.grep(0..max).sort.uniq
end