ili9341 copy background

[stan cartwright]

Probably seems silly but ili9341 and gcb work fast and cheap display.
notice there's SetAddressWindow_ILI9341 ( x,y,xwidth,yheight) which is not documented but safe to use.
There's now a readpixel_ILI9341 so thought about copying part of screen to an array

sub getbgnd
  ptr=1
  for hs=sprite_y to sprite_y+sprite_height
   for ws=sprite_x to sprite_x+sprite_width
      backgnd(ptr) = ReadPixel_ILI9341(ws,hs) and 0xfffff
      ptr++
   next ws
  next hs
end sub

and to replace the background

sub restorebgnd (sprite_x,sprite_y) ;fills box with sprite data
  SetAddressWindow_ILI9341 ( sprite_x,sprite_y,sprite_x + sprite_width-1,sprite_y + sprite_height - 1 )
;  SetAddressWindow_ILI9341 ( sprite_x,sprite_y,sprite_x + 23,sprite_y + 23)
  for ptr=1 to sprite_width * sprite_height
    SendWord_ILI9341 backgnd(ptr)
  next ptr
end sub

Is there a faster way like SetAddressWindow_ILI9341 but a window that can read height * width pixels and store them rather than the calculations to find a pixel x,y and then get it's colour for width * height times?

I really like these displays and gcb cos they cheap and you can use your imagination...
within glcd limits.
I push the boat out for this display. The 8bit use does not seem to do it justice but
I'm very happy with the gcld driver. Excellent!

[stan cartwright]

oh dear,arrays are only bytes
dim backgnd (255) as long compiles.
so if I want to store pixel background I use 3 bytes for every pixel as they are long values and then process the array which would be 3 times bigger as bytes. dim backgnd (765).
I don't think this project is gonna work out too good. pity