| [Overview][Constants][Types][Procedures and functions][Variables][Index] |
Free a ScreenBuffer structure.
Source position: intuition.pas line 3309
procedure FreeScreenBuffer( |
Screen: PScreen; |
ScreenBuffer: PScreenBuffer |
); |
Screen |
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A pointer to the screen this ScreenBuffer is associated with. |
ScreenBuffer |
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A pointer to a ScreenBuffer structure obtained from AllocScreenBuffer(). It is safe to call this function with a nil argument. It will have no effect. |
Frees a ScreenBuffer structure you got from AllocScreenBuffer(), and releases associated resources. You must call FreeScreenBuffer() before you close your screen.
Notes:
Originally, FreeScreenBuffer() did not WaitBlit() before freeing a BitMap. The intent was that the application should do this. Application writers should ensure that freeing the buffer is safe by calling WaitBlit() themselves.
The SB_SCREEN_BITMAP flag instructs AllocScreenBuffer() to provide a ScreenBuffer referring to the screen's actual bitmap. When you are done changing screen buffers, you must FreeScreenBuffer() the currently-installed ScreenBuffer before you close the screen. Intuition will recognize when FreeScreenBuffer() is called for the currently-installed ScreenBuffer, and will know to free the supporting structures but not the BitMap. CloseScreen() will take care of that.
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Get a ScreenBuffer for double-buffering. |
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Swap the screen's BitMap. |
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Change display memory address for multi-buffered animation |