d21b0be246
Now that the core vt code knows how to preserve unicode values for each displayed character, it is then possible to let user space access it via /dev/vcs*. Unicode characters are presented as 32 bit values in native endianity via the /dev/vcsu* devices, mimicking the simple /dev/vcs* devices. Unicode with attributes (similarly to /dev/vcsa*) is not supported at the moment. Data is available only as long as the console is in UTF-8 mode. ENODATA is returned otherwise. This was tested with the latest development version (to become version 5.7) of BRLTTY. Amongst other things, this allows ⠋⠕⠗ ⠞⠓⠊⠎ ⠃⠗⠁⠊⠇⠇⠑⠀⠞⠑⠭⠞⠀to appear directly on braille displays regardless of the console font being used. Signed-off-by: Nicolas Pitre <nico@linaro.org> Tested-by: Dave Mielke <Dave@mielke.cc> Acked-by: Adam Borowski <kilobyte@angband.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* selection.h
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*
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* Interface between console.c, tty_io.c, vt.c, vc_screen.c and selection.c
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*/
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#ifndef _LINUX_SELECTION_H_
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#define _LINUX_SELECTION_H_
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#include <linux/tiocl.h>
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#include <linux/vt_buffer.h>
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struct tty_struct;
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extern struct vc_data *sel_cons;
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struct tty_struct;
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extern void clear_selection(void);
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extern int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *tty);
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extern int paste_selection(struct tty_struct *tty);
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extern int sel_loadlut(char __user *p);
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extern int mouse_reporting(void);
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extern void mouse_report(struct tty_struct * tty, int butt, int mrx, int mry);
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extern int console_blanked;
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extern const unsigned char color_table[];
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extern unsigned char default_red[];
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extern unsigned char default_grn[];
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extern unsigned char default_blu[];
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extern unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed);
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extern u16 screen_glyph(struct vc_data *vc, int offset);
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extern void complement_pos(struct vc_data *vc, int offset);
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extern void invert_screen(struct vc_data *vc, int offset, int count, int shift);
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extern void getconsxy(struct vc_data *vc, unsigned char *p);
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extern void putconsxy(struct vc_data *vc, unsigned char *p);
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extern u16 vcs_scr_readw(struct vc_data *vc, const u16 *org);
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extern void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org);
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extern void vcs_scr_updated(struct vc_data *vc);
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extern int vc_uniscr_check(struct vc_data *vc);
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extern void vc_uniscr_copy_line(struct vc_data *vc, void *dest,
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unsigned int row, unsigned int col,
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unsigned int nr);
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#endif
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