Rendering oversized glyphs to a monospace grid

A method for rendering oversized glyphs to a monospace grid, the method comprising:

• collecting changed cells, namely, grid cells that upon being redrawn will get visible replacement glyph content differing from their respective original glyph content;
• collecting a non-empty set of first-level affected cells, namely, by adding to changed cells any cells that a changed cell overlaps plus any cells that overlap a changed cell, where overlap is assessed with regard to original glyph content or replacement glyph content or both;
• collecting a set of second-level affected cells, if any, namely, each cell that is not a first-level affected cell, and that a first-level affected cell overlaps or that overlaps a first-level affected cell, where overlap is with regard to original glyph content or replacement glyph content or both;
• clearing the contents of first-level affected cells;
• redrawing the contents of affected cells in a redraw sequence which complies with a predefined grid traversal order, thereby replacing the contents of affected cells with their respective replacement glyph content;
• and
• avoiding redrawing visible cells which are not affected cells.

A storage medium configured with code which upon execution by one or more processors performs a method for rendering oversized glyphs to a monospace grid, the method comprising:

• collecting changed cells, namely, grid cells that upon being redrawn will get visible replacement glyph content from their respective original glyph content;
• collecting a non-empty set of affected cells, namely, changed cells plus cells that a changed cell overlaps plus cells that overlap a changed cell, where overlap is with regard to original glyph content or replacement glyph content or both;
• clearing the contents of the affected cells;
• redrawing the contents of the affected cells in a redraw sequence which complies with a predefined grid traversal order, thereby replacing the contents of affected cells with their respective replacement glyph content;
• and
• avoiding redrawing an entire row of visible cells by avoiding redrawing at least one cell of the row which is not a changed cell.