erase-contents-box-x-y

Arguments: stream left top right bottom

Unfills a rectangular area on stream from an upper-left position at (left, top) to a lower-right position a (right, bottom). (Unfills means to fill with the stream's background-color.) stream should be a graphical-stream. The other arguments should be integers. To use a box object rather than individaul coordinates, see erase-contents-box.

The filled area will include the pixels where the x coordinate is equal to left and those where the y coordinate is equal to top, but not the pixels where the x coordinate is equal to right or those where the y coordinate is equal to bottom.

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Created 2019.8.20.