Docs » Autodocs » graphics.library » MakeVPort
MakeVPort -- generate display copper list for a viewport.
error = MakeVPort( view, viewport )
d0 a0 a1
ULONG MakeVPort( struct View *, struct ViewPort * );
Uses information in the View, ViewPort, ViewPort->RasInfo to
construct and intermediate copper list for this ViewPort.
view - pointer to a View structure
viewport - pointer to a ViewPort structure
The viewport must have valid pointer to a RasInfo.
constructs intermediate copper list and puts pointers in
viewport.DspIns
If the ColorMap ptr in ViewPort is NULL then it uses colors
from the default color table.
If DUALPF in Modes then there must be a second RasInfo pointed
to by the first RasInfo
From V39, MakeVPort can return a ULONG error value (previous versions
returned void), to indicate that either not enough memory could be
allocated for MakeVPort's use, or that the ViewPort mode
and bitplane alignments are incorrect for the bitplane's depth.
You should check for these error values - they are defined in
<graphics/view.h>.
In V37 and earlier, narrow Viewports (whose righthand edge is
less than 3/4 of the way across the display) do not work properly.
InitVPort(), MrgCop(), <graphics/view.h>, intuition.library/MakeScreen(), intuition.library/RemakeDisplay(), intuition.library/RethinkDisplay()
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