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layers.library
  BeginUpdate
  BehindLayer
  CreateBehindHookLayer
  CreateBehindLayer
  CreateUpfrontHookLayer
  CreateUpfrontLayer
  DeleteLayer
  DisposeLayerInfo
  DoHookClipRects
  EndUpdate
  FattenLayerInfo
  InitLayers
  InstallClipRegion
  InstallLayerHook
  InstallLayerInfoHook
  LockLayer
  LockLayerInfo
  LockLayers
  MoveLayer
  MoveLayerInFrontOf
  MoveSizeLayer
  NewLayerInfo
  ScrollLayer
  SizeLayer
  SwapBitsRastPortClipRect
  ThinLayerInfo
  UnlockLayer
  UnlockLayerInfo
  UnlockLayers
  UpfrontLayer
  WhichLayer
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Docs » Autodocs » layers.library » SwapBitsRastPortClipRect

NAME

	SwapBitsRastPortClipRect -- Swap bits between common bitmap
	                            and obscured ClipRect

SYNOPSIS

	SwapBitsRastPortClipRect( rp, cr )
	                          a0  a1
	void SwapBitsRastPortClipRect( struct RastPort *, struct ClipRect *);

FUNCTION

	Support routine useful for those that need to do some
	operations not done by the layer library.  Allows programmer
	to swap the contents of a small BitMap with a subsection of
	the display. This is accomplished without using extra memory.
	The bits in the display RastPort are exchanged with the
	bits in the ClipRect's BitMap.
	Note: the ClipRect structures which the layer library allocates are
	actually a little bigger than those described in the graphics/clip.h
	include file.  So be warned that it is not a good idea to have
	instances of cliprects in your code.

INPUTS

	rp - pointer to rastport
	cr - pointer to cliprect to swap bits with

NOTES

	Because the blit operation started by this function is done asynchronously,
	it is imperative that a WaitBlit() be performed before releasing or using
	the processor to modify any of the associated structures.

NAME

SYNOPSIS

FUNCTION

INPUTS

NOTES

BUGS

SEE ALSO

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