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Kernel+LibVT: Add function for deleting a range of characters
Previously, this was done by telling the client to put a space at each character in the range. This was inefficient, because a large number of function calls took place and incorrect, as the ANSI standard dictates that character attributes should be cleared as well. The newly added `clear_in_line` function solves this issue. It performs just one bounds check when it's called and can be implemented as a pretty tight loop.
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7 changed files with 60 additions and 53 deletions
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@ -217,10 +217,12 @@ protected:
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void scroll_up(u16 region_top, u16 region_bottom, size_t count);
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void scroll_down(u16 region_top, u16 region_bottom, size_t count);
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void put_character_at(unsigned row, unsigned column, u32 ch);
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void clear_in_line(u16 row, u16 first_column, u16 last_column);
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#else
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virtual void scroll_up(u16 region_top, u16 region_bottom, size_t count) = 0;
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virtual void scroll_down(u16 region_top, u16 region_bottom, size_t count) = 0;
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virtual void put_character_at(unsigned row, unsigned column, u32 ch) = 0;
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virtual void clear_in_line(u16 row, u16 first_column, u16 last_column) = 0;
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#endif
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void unimplemented_control_code(u8);
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