Flip

FreeBASIC

Flip
 
Changes the current video display page

Syntax

Declare Sub Flip ( ByVal frompage As Long = -1, ByVal topage As Long = -1 )

Usage

Flip [ frompage ] [, topage ]

Parameters

frompage
previous page
topage
new page to display

Description

In normal graphics mode, Flip is an alias for PCopy and ScreenCopy. See ScreenCopy for details.

In OpenGL mode, Flip does a hardware page flip and displays the contents of the backbuffer. It is recommended that you call Flip regularly while in OpenGL mode, otherwise your app may also become unresponsive.

Example

ScreenRes 320, 240, 32, 2    'Sets up the screen to be 320x240 in 32-bit color with 2 video pages.


For n As Integer = 50 To 270

    ScreenSet 1,0     'Sets the working page to 1 and the displayed page to 0
    Cls
    Circle (n, 50),50 ,RGB(255,255,0) 'Draws a circle with a 50 pixel radius in yellow on page 1
    Flip 1,0    'Copies our circle from page 1 to page 0

    Sleep 25
Next

Print "Now wasn't that neat!"
Print "Push any key."
Sleep



Dialect Differences

  • Not available in the -lang qb dialect unless referenced with the alias __Flip.

Differences from QB

  • New to FreeBASIC