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3fdb1c14f1
If your main module has this declaration:
STATIC_YOINK("vga_console");
Then a VGA driver will be linked into your executable which
displays your stdio characters on the PC display, whereas
before we could only use the serial port. Your display is an
ANSI terminal and it's still a work in progress.
118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
#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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