Docs » Autodocs » graphics.library » ScrollRasterBF
ScrollRasterBF -- Push bits in rectangle in raster around by
dx,dy towards 0,0 inside rectangle. Newly empty areas
will be filled via EraseRect(). (V39)
ScrollRasterBF(rp, dx, dy, xmin, ymin, xmax, ymax)
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void ScrollRasterBF
(struct RastPort *, WORD, WORD, WORD, WORD, WORD, WORD);
Move the bits in the raster by (dx,dy) towards (0,0)
The space vacated is filled by calling EraseRect().
Limit the scroll operation to the rectangle defined
by (xmin,ymin)(xmax,ymax). Bits outside will not be
affected. If xmax,ymax is outside the rastport then use
the lower right corner of the rastport.
If you are dealing with a SimpleRefresh layered RastPort you
should check rp->Layer->Flags & LAYERREFRESH to see if
there is any damage in the damage list. If there is you should
call the appropriate BeginRefresh(Intuition) or BeginUpdate(graphics)
routine sequence.
rp - pointer to a RastPort structure
dx,dy are integers that may be positive, zero, or negative
xmin,ymin - upper left of bounding rectangle
xmax,ymax - lower right of bounding rectangle
This call is exactly the same as ScrollRaster, except that it calls
EraseRect() instead of RectFill() when clearing the newly exposed
area. This allows use of a custom layer backfill hook.
ScrollRaster(), EraseRect(), intuition.library/ScrollWindowRaster(), <graphics/rastport.h>
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