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% notcurses_lines(3)
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% nick black <nickblack@linux.com>
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% v1.2.1
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# NAME
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notcurses_lines - operations on lines and boxes
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# SYNOPSIS
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**#include <notcurses.h>**
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**int ncplane_hline_interp(struct ncplane* n, const cell* c, int len, uint64_t c1, uint64_t c2);**
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**static inline int ncplane_hline(struct ncplane* n, const cell* c, int len);**
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**int ncplane_vline_interp(struct ncplane* n, const cell* c, int len, uint64_t c1, uint64_t c2);**
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**static inline int ncplane_vline(struct ncplane* n, const cell* c, int len);**
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```c
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#define NCBOXMASK_TOP 0x0001
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#define NCBOXMASK_RIGHT 0x0002
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#define NCBOXMASK_BOTTOM 0x0004
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#define NCBOXMASK_LEFT 0x0008
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#define NCBOXGRAD_TOP 0x0010
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#define NCBOXGRAD_RIGHT 0x0020
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#define NCBOXGRAD_BOTTOM 0x0040
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#define NCBOXGRAD_LEFT 0x0080
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#define NCBOXCORNER_MASK 0x0300
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#define NCBOXCORNER_SHIFT 8u
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```
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**int ncplane_box(struct ncplane* n, const cell* ul, const cell* ur,
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const cell* ll, const cell* lr, const cell* hline,
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const cell* vline, int ystop, int xstop,
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unsigned ctlword);**
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**static inline int
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ncplane_box_sized(struct ncplane* n, const cell* ul, const cell* ur,
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const cell* ll, const cell* lr, const cell* hline,
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const cell* vline, int ylen, int xlen, unsigned ctlword);**
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**static inline int ncplane_perimeter(struct ncplane* n, const cell* ul, const cell* ur, const cell* ll, const cell* lr, const cell* hline, const cell* vline, unsigned ctlword)**
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**static inline int cells_load_box(struct ncplane* n, uint32_t attrs, uint64_t channels, cell* ul, cell* ur, cell* ll, cell* lr, cell* hl, cell* vl, const char* gclusters);**
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**static inline int cells_rounded_box(struct ncplane* n, uint32_t attr, uint64_t channels, cell* ul, cell* ur, cell* ll, cell* lr, cell* hl, cell* vl);**
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**static inline int ncplane_rounded_box(struct ncplane* n, uint32_t attr, uint64_t channels, int ystop, int xstop, unsigned ctlword);**
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**static inline int ncplane_rounded_box_sized(struct ncplane* n, uint32_t attr, uint64_t channels, int ylen, int xlen, unsigned ctlword);**
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**static inline int cells_double_box(struct ncplane* n, uint32_t attr, uint64_t channels, cell* ul, cell* ur, cell* ll, cell* lr, cell* hl, cell* vl);**
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**static inline int ncplane_double_box(struct ncplane* n, uint32_t attr, uint64_t channels, int ystop, int xstop, unsigned ctlword);**
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**static inline int ncplane_double_box_sized(struct ncplane* n, uint32_t attr, uint64_t channels, int ylen, int xlen, unsigned ctlword);**
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**int ncplane_polyfill_yx(struct ncplane* n, int y, int x, const cell* c);**
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**int ncplane_gradient(struct ncplane* n, const char* egc, uint32_t attrword, uint64_t ul, uint64_t ur, uint64_t ll, uint64_t lr, int ystop, int xstop);**
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**static inline int ncplane_gradient_sized(struct ncplane* n, const char* egc, uint32_t attrword, uint64_t ul, uint64_t ur, uint64_t ll, uint64_t lr, int ylen, int xlen);**
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# DESCRIPTION
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# RETURN VALUES
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# SEE ALSO
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**notcurses(3)**,
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**notcurses_cell(3)**,
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**notcurses_ncplane(3)**
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