add video export examples

external_library/java/video_export/basic.rb

@@ -0,0 +1,44 @@
+#!/usr/bin/env jruby
+# frozen_string_literal: true
+require 'propane'
+
+class BasicExample < Propane::App
+
+  load_library :VideoExport
+  include_package 'com.hamoid'
+
+  # Press 'q' to finish saving the movie and exit.
+
+  # In some systems, if you close your sketch by pressing ESC,
+  # by closing the window, or by pressing STOP, the resulting
+  # movie might be corrupted. If that happens to you, use
+  # video_export.end_movie like you see in this example.
+
+  # In some systems pressing ESC produces correct movies
+  # and .end_movie is not necessary.
+  attr_reader :video_export
+
+  def settings
+    size(600, 600)
+  end
+
+  def setup
+    sketch_title 'Basic Example'
+    @video_export = VideoExport.new(self)
+    video_export.start_movie
+  end
+
+  def draw
+    background(color('#224488'))
+    rect(frame_count * frame_count % width, 0, 40, height)
+    video_export.save_frame
+  end
+
+  def key_pressed
+    return unless (key == 'q')
+    video_export.end_movie
+    exit
+  end
+end
+
+BasicExample.new

external_library/java/video_export/using_pgraphics.rb

@@ -0,0 +1,41 @@
+#!/usr/bin/env jruby
+# frozen_string_literal: true
+require 'propane'
+
+class CreateGraphicsExample < Propane::App
+
+  load_library :VideoExport
+  include_package 'com.hamoid'
+
+  VideoExport
+  attr_reader :pg, :video_export
+
+  def settings
+    size(600, 600)
+  end
+
+  def setup
+    sketch_title 'Create Graphics'
+    @pg = createGraphics(640, 480)
+    @video_export = VideoExport.new(self, data_path('pgraphics.mp4'), pg)
+    video_export.start_movie
+  end
+
+  def draw
+    background(0)
+    text(format('exporting video %d', frame_count), 50, 50)
+    pg.begin_draw
+    pg.background(color('#224488'))
+    pg.rect(pg.width * noise(frame_count * 0.01), 0, 40, pg.height)
+    pg.end_draw
+    video_export.save_frame
+  end
+
+  def key_pressed
+    return unless (key == 'q')
+    video_export.end_movie
+    exit
+  end
+end
+
+CreateGraphicsExample.new