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119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
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#ifndef COSMOPOLITAN_LIBC_VGA_VGA_INTERNAL_H_
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#define COSMOPOLITAN_LIBC_VGA_VGA_INTERNAL_H_
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/*
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* VGA_TTY_HEIGHT, VGA_TTY_WIDTH, & VGA_USE_WCS are configuration knobs
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* which can potentially be used to tweak the features to be compiled into
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* our VGA teletypewriter support.
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*/
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/**
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* Height of the video screen, in character units. Undefine if the height
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* may vary at runtime.
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*/
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#define VGA_TTY_HEIGHT 25
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/**
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* Width of the video screen, in character units. Undefine if the width may
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* vary at runtime.
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*/
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#define VGA_TTY_WIDTH 80
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/**
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* If VGA_USE_WCS is defined, the tty code can maintain an array of the
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* Unicode characters "underlying" the 8-bit (or 9-bit) characters that are
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* actually displayed on the text screen. This can be used to implement
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* something similar to Linux's /dev/vcsu* facility.
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*
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* @see lkml.kernel.org/lkml/204888.1529277815@turing-police.cc.vt.edu/T/
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*/
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#undef VGA_USE_WCS
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#define kTtyFg 0x0001
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#define kTtyBg 0x0002
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#define kTtyBold 0x0004
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#define kTtyFlip 0x0008
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#define kTtyFaint 0x0010
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#define kTtyUnder 0x0020
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#define kTtyDunder 0x0040
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#define kTtyTrue 0x0080
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#define kTtyBlink 0x0100
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#define kTtyItalic 0x0200
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#define kTtyFraktur 0x0400
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#define kTtyStrike 0x0800
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#define kTtyConceal 0x1000
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#define kTtyBell 0x001
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#define kTtyRedzone 0x002
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#define kTtyNocursor 0x004
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#define kTtyBlinkcursor 0x008
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#define kTtyNocanon 0x010
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#define kTtyNoecho 0x020
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#define kTtyNoopost 0x040
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#define kTtyLed1 0x080
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#define kTtyLed2 0x100
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#define kTtyLed3 0x200
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#define kTtyLed4 0x400
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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#include "libc/calls/struct/fd.internal.h"
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#include "libc/calls/struct/iovec.h"
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#include "libc/calls/struct/iovec.internal.h"
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COSMOPOLITAN_C_START_
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struct VgaTextCharCell {
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uint8_t ch, attr;
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};
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struct Tty {
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unsigned short y, x;
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#ifndef VGA_TTY_HEIGHT
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unsigned short yn;
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#endif
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#ifndef VGA_TTY_WIDTH
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unsigned short xn;
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#endif
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uint32_t u8;
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uint32_t n8;
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uint32_t pr;
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uint8_t fg, bg;
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uint32_t conf;
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unsigned short savey, savex;
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struct VgaTextCharCell *ccs;
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#ifdef VGA_USE_WCS
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wchar_t *wcs;
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#endif
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wchar_t *xlat;
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enum TtyState {
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kTtyAscii,
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kTtyUtf8,
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kTtyEsc,
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kTtyCsi,
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} state;
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struct TtyEsc {
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unsigned i;
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char s[64];
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} esc;
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struct TtyInput {
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size_t i;
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char p[256];
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} input;
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};
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void _StartTty(struct Tty *, unsigned short, unsigned short,
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unsigned short, unsigned short, void *, wchar_t *);
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ssize_t _TtyRead(struct Tty *, void *, size_t);
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ssize_t _TtyWrite(struct Tty *, const void *, size_t);
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ssize_t _TtyWriteInput(struct Tty *, const void *, size_t);
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void _TtyResetOutputMode(struct Tty *);
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void _TtyFullReset(struct Tty *);
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void _TtyMemmove(struct Tty *, size_t, size_t, size_t);
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void _TtyErase(struct Tty *, size_t, size_t);
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void _TtySetY(struct Tty *, unsigned short);
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void _TtySetX(struct Tty *, unsigned short);
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ssize_t sys_writev_vga(struct Fd *, const struct iovec *, int);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_VGA_VGA_INTERNAL_H_ */
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