83Plus:BCALLs:5236

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Synopsis

Unofficial Name: RectBorder

BCALL Address: 5236

Minimum OS Version: 2.30

Either draws, erases, or inverts a rectangular border on the screen.

Inputs

• B: type of drawing (0 to erase, 1 to draw, 2 to invert)
• H: upper left corner pixel row
• L: upper left corner pixel column
• D: lower right corner pixel row
• E: lower right corner pixel column
• plotLoc,(iy+plotFlags) set to update display only, reset for both display and graph buffer

Outputs

• Rectangle is drawn

Destroys

• saveSScreen

Comments

This is the exact same thing as BCALLing DrawRectBorder or EraseRectBorder, though I suppose this has the advantage of being able to invert it.

It was added in OS 2.30. Do not attempt to BCALL it on an earlier version.