Home / Autodocs / graphics.library
NAME
- MakeVPort
-
generate display copper list for a viewport.
SYNOPSIS
error = MakeVPort( view, viewport )
ULONG MakeVPort( struct View *, struct ViewPort * );
d0 a0 a1
FUNCTION
Uses information in the View, ViewPort, ViewPort->RasInfo to construct and intermediate copper list for this ViewPort.
INPUTS
- view
-
pointer to a View structure
- viewport
-
pointer to a ViewPort structure The viewport must have valid pointer to a RasInfo.
RESULT
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>.
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>.
BUGS
In V37 and earlier, narrow Viewports (whose righthand edge is less than 3/4 of the way across the display) do not work properly.