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NAME

VPOrigin: Find the first visible pixel in the ViewPort (V39)

SYNOPSIS

VPOrigin(v, vp, origin1, origin2)

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void VPOrigin(struct View *, struct ViewPort *, Point *, Point *);

FUNCTION

To find the top left visible pixel in a viewport after accounting for hardware limitations.

INPUTS

v: View the ViewPort is in.
vp: This ViewPort
origin1: The Point structure that is to be filled for the first playfield.
origin2: The Point structure that is to be filled for the second playfield, or NULL if not dualplayfield.

RESULT

originx: The Point structure will hold the coordinate in ViewPort resolution of the first visible pixel, relative to the View origin.

NOTES

The ViewPort must have a properly initialised DisplayClip in a ViewPortExtra that has been Associated with the ViewPort.

SEE ALSO

<graphics/view.h> <graphics/gfx.h> GfxNew() GfxAssociate()