ROKU 4 :: Position problem with Roimagecanvas

This has to do with some funny behavior of roImageCanvas.  It tops out at 1280x720, even if the UI is running FHD.  I've seen this problem in a custom video player that was using GetCanvasRect() to set the video destination on the screen.  In Roku 4 it only covered half the screen.  Best thing to do is to use the width and height from GetCanvasRect() to calculate positions rather than GetDisplaySize().


For reference, here's output from a dummy channel I have to dump all this stuff:

------ Running dev 'Display Modes Dump' main ------

----- roDeviceInfo -----
GetDisplayType = HDTV
GetDisplayMode = 1080p
GetDisplayAspectRatio = 16x9
GetDisplaySize = 
  {
    GetDisplaySize: w = 1920
    GetDisplaySize: h = 1080
  }
GetDisplayProperties = 
  {
    GetDisplayProperties: width = 41
    GetDisplayProperties: height = 23
    GetDisplayProperties: Hdr10 = false
    GetDisplayProperties: DolbyVision = false
    GetDisplayProperties: internal = false
  }
GetSupportedGraphicsResolutions = 
  [
  {
    GetSupportedGraphicsResolutions: width = 1280
    GetSupportedGraphicsResolutions: name = HD
    GetSupportedGraphicsResolutions: preferred = false
    GetSupportedGraphicsResolutions: height = 720
    GetSupportedGraphicsResolutions: ui = false
  }
  {
    GetSupportedGraphicsResolutions: width = 1920
    GetSupportedGraphicsResolutions: name = FHD
    GetSupportedGraphicsResolutions: preferred = true
    GetSupportedGraphicsResolutions: height = 1080
    GetSupportedGraphicsResolutions: ui = true
  }
  ]
GetVideoMode = 1080p
GetCanvasRect = 
  {
    GetCanvasRect: w = 1280
    GetCanvasRect: x = 0
    GetCanvasRect: y = 0
    GetCanvasRect: h = 720
  }
GetUIResolution = 
  {
    GetUIResolution: width = 1920
    GetUIResolution: name = FHD
    GetUIResolution: height = 1080
  }
------------------------