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;
; ------------------------------------------------------------
;
;   PureBasic - Sprite example file (slightly modified)
;
;    (c) Fantaisie Software
;
; ------------------------------------------------------------
;


;#########################################################################################################
; With OpenGL (default subsystem) ScreenID() always returns null.
; But ScreenID() works fine with subsystems DirectX9 and DirectX11.
; ( x64 and x86; ASM and C backend )
;#########################################################################################################
;DirectX9
;DirectX11


If InitSprite() = 0 Or InitKeyboard() = 0
  MessageRequester("Error", "Sprite system can't be initialized", 0)
  End
EndIf

If ExamineDesktops() = 0
  MessageRequester("Error", "ExamineDesktops() = 0", 0)
  End
EndIf
sw = DesktopWidth(0)
sh = DesktopHeight(0)
sd = DesktopDepth(0)

If OpenScreen(sw, sh, sd, "Sprite")

  ; Load our 16 bit sprite (which is a 24 bit picture in fact, as BMP doesn't support 16 bit format)
  ;
  LoadSprite(0, #PB_Compiler_Home + "examples/sources/Data/PureBasic.bmp")
  CopySprite(0, 1, 0)
  
  Repeat
    
    ; Inverse the buffers (the back become the front (visible)... And we can do the rendering on the back)
    
    FlipBuffers()
    
    ClearScreen(RGB(0,0,0))
    
    ; Draw our sprite

    ClipSprite(0, 0, 0, x, x/8)
     
    DisplaySprite(0, x, 100)
    DisplaySprite(1, x, x)
    DisplaySprite(0, 600-x, x)
    
    ;#####################################################################################################
    ; Draw ScreenID (upper left screen corner)
    ;#####################################################################################################
    If StartDrawing(ScreenOutput())
      DrawText(0, 0, "ScreenID = "+Str(ScreenID()))
      StopDrawing()
    EndIf
    
    x+1
    
    ExamineKeyboard()
  Until KeyboardPushed(#PB_Key_Escape)
  
Else
  MessageRequester("Error", "Can't open a "+sw+"*"+sh+" - "+sd+" bit screen !", 0)
EndIf