acotilla91

sub gifDecoderDidFinish(frames as Object, fps as Float)
  m.animator.callFunc("start", frames, fps, m.posterGrid.getChild(m.focusedItem))
end sub

acotilla91

sub focusItem(item as Integer)
  (...)
  ' Stop previous poster animation
  m.animator.callFunc("finish")
end sub

acotilla91

sub init()
  m.animator = createObject("roSGNode", "FrameAnimator")
  (...)
end sub

acotilla91

sub init()
  m.animator = CreateObject("roSGNode", "Timer")
  m.animator.ObserveField("fire", "displayNextFrame")
  m.animator.repeat = true

  m.frames = []
  m.frameIndex = -1
  m.poster = invalid
end sub

acotilla91

<component name="FrameAnimator" extends="Node">
  <interface>
    <function name="start"/>
    <function name="finish"/>
  </interface>

  <script type="text/brightscript" uri="pkg:/components/FrameAnimator.brs"/>
</component>

acotilla91

sub focusItem(item as Integer)
  (...)
  ' Start decoder
  m.decoder.callFunc("decodeGIF", getGIFUrl(item))
end sub

acotilla91

sub gifDecoderDidFinish(frames as Object, fps as Float)
  ?"frames "frames
end sub

acotilla91

sub init()
  m.decoder = createObject("roSGNode", "GIFDecoder")
  m.decoder.delegate = m.top
  (...)
end sub

acotilla91

<component name="AppScene" extends="Scene">
  <interface>
    <!-- GIFDecoder callback -->
    <function name="gifDecoderDidFinish"/>
  </interface>

  <script type="text/brightscript" uri="pkg:/components/AppScene.brs"/>
</component>

acotilla91

sub decodeGIF(gifPath as String)
  m.top.functionName = "runDecoder"

  m.gifPath = gifPath
  m.gifName = CreateObject("roPath", m.gifPath).split().basename
  m.top.control = "RUN"
end sub

sub runDecoder()
  ' Load the main GIF into memory.