GWBASIC User's Manual

GW-BASIC User's Guide
PAINT Statement
Purpose:
To fill in a graphics figure with the selected attribute.
Syntax:
PAINT (x start,y start)[,paint attribute[,border attribute][,bckgrnd
attribute]]
Comments:
The PAINT statement fills in an arbitrary graphics figure of the specified border attribute with the
specified paint attribute. If paint attribute is not given, it will default to the foreground
attribute (3 or 1). border attribute defaults to paint attribute. See the COLOR and
PALETTE statements for more information.
PAINT must start on a non-border point, otherwise, PAINT will have no effect.
PAINT can fill any figure, but painting jagged edges or very complex figures may result in an
"Out of memory" error. The CLEAR statement may be used to increase the amount of stack
space available.
Points that are specified outside the limits of the screen will not be plotted and no error will occur.
See the SCREEN statement for a description of the different screen modes.
Paint Tiling
PAINT tiling is similar to LINE styling. Like LINE, PAINT looks at a tiling mask each time a
point is put down on the screen.
If paint attribute is omitted, the standard foreground attribute is used.
If paint attribute is a numeric formula, then the number must be a valid color, and it is used
to paint the area as before.
If paint attribute is a string formula, then tiling is performed as follows:
The tile mask is always eight bits wide and may be from 1 to 64 bytes long.
Each byte in the tile string masks eight bits along the x axis when putting down points. Each byte
of the tile string is rotated as required to align along the y axis, such that:
tile_byte_mask=y MOD tile_length
where y is the position of the graphics cursor on the y-axis.
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