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InitRastPort -- Initialize raster port structure
InitRastPort( rp )
a1
void InitRastPort(struct RastPort *rp);
Initialize a RastPort structure to standard values.
rp = pointer to a RastPort structure.
all entries in RastPort get zeroed out, with the following exceptions:
Mask, FgPen, AOLPen, and LinePtrn are set to -1.
The DrawMode is set to JAM2
The font is set to the standard system font
The struct Rastport describes a control structure
for a write-able raster. The RastPort structure
describes how a complete single playfield display
will be written into. A RastPort structure is
referenced whenever any drawing or filling
operations are to be performed on a section of
memory.
The section of memory which is being used in this
way may or may not be presently a part of the
current actual onscreen display memory. The name
of the actual memory section which is linked to
the RastPort is referred to here as a "raster" or
as a bitmap.
NOTE: Calling the routine InitRastPort only
establishes various defaults. It does NOT
establish where, in memory, the rasters are
located. To do graphics with this RastPort the user
must set up the BitMap pointer in the RastPort.
<graphics/rastport.h>
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