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mc/slang/slvideo.c
Pavel Roskin 6a5df4c736 * slvideo.c: Include _slang.h, not slang.h.
2002-01-21 23:37:36 +00:00

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/* Copyright (c) 1992, 1995 John E. Davis
* All rights reserved.
*
* You may distribute under the terms of either the GNU General Public
* License or the Perl Artistic License.
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#ifdef __WIN32__
# include <windows.h>
#endif
#ifdef __GO32__
# undef msdos
#endif
#if defined (msdos)
# include <conio.h>
# include <bios.h>
# include <mem.h>
#endif
#if defined (__WATCOMC__)
# include <graph.h>
# define int86 int386 /* simplify code writing */
#endif
#if defined (__GO32__)
# include <pc.h>
# define GO32_VIDEO
#endif
#if defined (__os2__) && !defined (EMX_VIDEO)
# define INCL_BASE
# define INCL_NOPM
# define INCL_VIO
# define INCL_KBD
# include <os2.h>
#else
# if defined (__EMX__) /* EMX video does both DOS & OS/2 */
# ifndef EMX_VIDEO
# define EMX_VIDEO
# endif
# include <sys/video.h>
# endif
#endif
#include <dos.h>
#include "_slang.h"
#ifdef GO32_VIDEO
# define HAS_SAVE_SCREEN
#endif
/* ------------------------- global variables ------------------------- */
#ifdef WIN32
extern HANDLE hStdout, hStdin;
extern CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
#endif
int SLtt_Term_Cannot_Insert;
int SLtt_Term_Cannot_Scroll;
int SLtt_Ignore_Beep = 3;
int SLtt_Use_Ansi_Colors;
int SLtt_Screen_Rows = 25;
int SLtt_Screen_Cols = 80;
/* ------------------------- local variables -------------------------- */
static int Attribute_Byte;
static int Scroll_r1 = 0, Scroll_r2 = 25;
static int Cursor_Row = 1, Cursor_Col = 1;
static int Current_Color;
static int IsColor = 1;
static int Blink_Killed; /* high intensity background enabled */
#define JMAX_COLORS 256
#define JNORMAL_COLOR 0
#define JNO_COLOR -1
static unsigned char Color_Map [JMAX_COLORS] =
{
0x7, 0x70, 0x70, 0x70, 0x70, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7
};
#define JMAX_COLOR_NAMES 16
static char *Color_Names [JMAX_COLOR_NAMES] =
{
"black", "blue", "green", "cyan",
"red", "magenta", "brown", "lightgray",
"gray", "brightblue", "brightgreen", "brightcyan",
"brightred", "brightmagenta", "yellow", "white"
};
/*
* set_color_from_attribute (int attribute);
* define the correspondence of color to attribute
*/
#define set_color_from_attribute(a)\
SLtt_set_color (\
JNORMAL_COLOR, NULL,\
Color_Names[(a) & 0xf],\
Color_Names[(a) >> 4])
/* this is how to make a space character */
#define mkSpaceChar() (((Attribute_Byte) << 8) | 0x20)
/* buffer to hold a line of character/attribute pairs */
#define MAXCOLS 256
static unsigned char Line_Buffer [MAXCOLS*2];
/*----------------------------------------------------------------------*\
* define various ways and means of writing to the screen
\*----------------------------------------------------------------------*/
#if defined (__GO32__) || defined (__WATCOMC__)
# if !defined (GO32_VIDEO)
# define HAS_LINEAR_SCREEN
# endif
#else /* __GO32__ or __WATCOMC__ */
# if defined (msdos)
# define USE_ASM
# endif
#endif /* __GO32__ or __WATCOMC__ */
/* define for direct to memory screen writes */
#if defined (USE_ASM) || defined (HAS_LINEAR_SCREEN)
static unsigned char *Video_Base;
# define mkScreenPointer(row,col) ((unsigned short *)\
(Video_Base +\
2 * (SLtt_Screen_Cols * (row)\
+ (col))))
# if defined (USE_ASM)
int SLtt_Msdos_Cheap_Video = 0;
static int Video_Status_Port;
# define MONO_STATUS 0x3BA
# define CGA_STATUS 0x3DA
# define CGA_SETMODE 0x3D8
# define SNOW_CHECK \
if (SLtt_Msdos_Cheap_Video)\
{ while ((inp (CGA_STATUS) & 0x08)); while (!(inp (CGA_STATUS) & 0x08)); }
# endif /* USE_ASM */
#endif /* USE_ASM or HAS_LINEAR_SCREEN */
/* -------------------------------------------------------------------- */
#if defined (__WATCOMC__)
# define ScreenPrimary (0xb800 << 4)
# define ScreenSize (SLtt_Screen_Cols * SLtt_Screen_Rows)
# define ScreenSetCursor (x,y) _settextposition (x+1,y+1)
void ScreenGetCursor (int *x, int *y)
{
struct rccoord rc = _gettextposition ();
*x = rc.row - 1;
*y = rc.col - 1;
}
void ScreenRetrieve (unsigned char *dest)
{
memcpy (dest, (unsigned char *) ScreenPrimary, 2 * ScreenSize);
}
void ScreenUpdate (unsigned char *src)
{
memcpy ((unsigned char *) ScreenPrimary, src, 2 * ScreenSize);
}
#endif /* __WATCOMC__ */
#ifdef HAS_SAVE_SCREEN
static void *Saved_Screen_Buffer;
static int Saved_Cursor_Row;
static void save_screen (void)
{
int row, col;
if (Saved_Screen_Buffer != NULL)
{
SLFREE (Saved_Screen_Buffer);
Saved_Screen_Buffer = NULL;
}
#ifdef GO32_VIDEO
Saved_Screen_Buffer = SLMALLOC (sizeof (short) *
ScreenCols () * ScreenRows ());
if (Saved_Screen_Buffer == NULL)
return;
ScreenRetrieve (Saved_Screen_Buffer);
ScreenGetCursor (&row, &col);
Saved_Cursor_Row = row;
#endif
}
static void restore_screen (void)
{
if (Saved_Screen_Buffer == NULL) return;
#ifdef GO32_VIDEO
ScreenUpdate (Saved_Screen_Buffer);
SLtt_goto_rc (Saved_Cursor_Row, 0);
#endif
}
#endif /* HAS_SAVE_SCREEN */
/*----------------------------------------------------------------------*\
* Function: void SLtt_write_string (char *str);
*
* put string STR to 'stdout'
\*----------------------------------------------------------------------*/
void SLtt_write_string (char *str)
{
#ifdef WIN32
int bytes;
(void) WriteConsole(hStdout, str, strlen(str), &bytes, NULL);
#else
fputs (str, stdout);
#endif
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_set_scroll_region (int r1, int r2);
*
* define a scroll region of top_row to bottom_row
\*----------------------------------------------------------------------*/
void SLtt_set_scroll_region (int top_row, int bottom_row)
{
Scroll_r1 = top_row;
Scroll_r2 = bottom_row;
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_reset_scroll_region (void);
*
* reset the scrol region to be the entire screen,
* ie, SLtt_set_scroll_region (0, SLtt_Screen_Rows);
\*----------------------------------------------------------------------*/
void SLtt_reset_scroll_region (void)
{
Scroll_r1 = 0;
Scroll_r2 = SLtt_Screen_Rows;
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_goto_rc (int row, int col);
*
* move the terminal cursor to x,y position COL, ROW and record the
* position in Cursor_Row, Cursor_Col
\*----------------------------------------------------------------------*/
void SLtt_goto_rc (int row, int col)
{
#ifdef WIN32
COORD newPosition;
newPosition.X = col;
newPosition.Y = row;
#endif
#if !defined (USE_ASM)
if (row > SLtt_Screen_Rows) row = SLtt_Screen_Rows;
if (col > SLtt_Screen_Cols) col = SLtt_Screen_Cols;
# if defined (EMX_VIDEO)
v_gotoxy (col, Scroll_r1 + row);
# else /* EMX_VIDEO_ */
# if defined (__os2__)
VioSetCurPos (Scroll_r1 + row, col, 0);
# elif defined(WIN32)
(void) SetConsoleCursorPosition(hStdout, newPosition);
# else /* __os2__ */
# if defined (__GO32__) || defined (__WATCOMC__)
ScreenSetCursor(Scroll_r1 + row, col);
# endif /* __GO32__ or __WATCOMC__ */
# endif /* __os2__ */
# endif /* EMX_VIDEO_ */
Cursor_Row = row;
Cursor_Col = col;
#else /* USE_ASM */
/* if (r > SLtt_Screen_Rows - 1) r = SLtt_Screen_Rows - 1; */
asm mov ax, row
asm mov bx, SLtt_Screen_Rows
asm dec bx
asm cmp ax, bx
asm jle L1
asm mov ax, bx
L1:
/* if (c > SLtt_Screen_Cols - 1) c = SLtt_Screen_Cols - 1; */
asm mov cx, SLtt_Screen_Cols
asm dec cx
asm mov bx, col
asm cmp bx, cx
asm jle L2
asm mov bx, cx
L2:
asm mov Cursor_Row, ax
asm mov Cursor_Col, bx
asm add ax, Scroll_r1
asm xor dx, dx
asm mov dh, al
asm mov dl, bl
asm xor bx, bx
asm mov ax, 0x200
asm int 0x10
#endif /* USE_ASM */
}
/*----------------------------------------------------------------------*\
* Function: static void slvid_getxy (void);
*
* retrieve the cursor position into Cursor_Row, Cursor_Col
\*----------------------------------------------------------------------*/
static void slvid_getxy (void)
{
#if !defined (USE_ASM)
# if defined (EMX_VIDEO)
v_getxy (&Cursor_Col, &Cursor_Row);
# else /* EMX_VIDEO */
# if defined (__os2__)
VioGetCurPos ((USHORT*) &Cursor_Row, (USHORT*) &Cursor_Col, 0);
# elif defined(WIN32)
CONSOLE_SCREEN_BUFFER_INFO screenInfo;
if (GetConsoleScreenBufferInfo(hStdout, &screenInfo) == TRUE)
{
Cursor_Row = screenInfo.dwCursorPosition.Y;
Cursor_Col = screenInfo.dwCursorPosition.X;
}
# else /* __os2__ */
# if defined (__GO32__) || defined (__WATCOMC__)
ScreenGetCursor (&Cursor_Row, &Cursor_Col);
# endif /* __GO32__ or __WATCOMC__ */
# endif /* __os2__ */
# endif /* EMX_VIDEO */
#else /* USE_ASM */
asm mov ah, 3
asm mov bh, 0
asm int 10h
asm xor ax, ax
asm mov al, dh
asm mov Cursor_Row, ax
asm xor ax, ax
asm mov al, dl
asm mov Cursor_Col, ax
#endif /* USE_ASM */
}
/*----------------------------------------------------------------------*\
* static void slvid_deleol (int x);
*
* write space characters from column X of row Cursor_Row through to
* SLtt_Screen_Cols using the current Attribute_Byte
\*----------------------------------------------------------------------*/
#if defined (GO32_VIDEO)
static void slvid_deleol (int x)
{
while (x < SLtt_Screen_Cols)
ScreenPutChar (32, Attribute_Byte, x++, Cursor_Row);
}
#endif
#if defined (EMX_VIDEO)
static void slvid_deleol (int x)
{
unsigned char *p, *pmax;
int w = mkSpaceChar ();
int count = SLtt_Screen_Cols - x;
p = Line_Buffer;
pmax = p + 2 * count;
while (p < pmax)
{
*p++ = (unsigned char) w;
*p++ = (unsigned char) (w >> 8);
}
v_putline (Line_Buffer, x, Cursor_Row, count);
}
#endif /* EMX_VIDEO */
/*----------------------------------------------------------------------*\
* Function: void SLtt_begin_insert (void);
*
* insert a single space, moving everything right 1 character to make room
\*----------------------------------------------------------------------*/
void SLtt_begin_insert (void)
{
#if !defined (GO32_VIDEO)
# if defined (HAS_LINEAR_SCREEN) || defined (USE_ASM)
unsigned short *p;
# if defined (HAS_LINEAR_SCREEN)
unsigned short *pmin;
# endif
# endif
int n;
slvid_getxy ();
n = SLtt_Screen_Cols - Cursor_Col;
/* Msdos_Insert_Mode = 1; */
# ifndef WIN32
# if defined (EMX_VIDEO)
v_getline (Line_Buffer, Cursor_Col, Cursor_Row, n);
v_putline (Line_Buffer, Cursor_Col+1, Cursor_Row, n - 1);
# else /* EMX_VIDEO */
# if defined (__os2__)
n = 2 * (n - 1);
VioReadCellStr ((PCH)Line_Buffer, (USHORT*) &n, Cursor_Row, Cursor_Col, 0);
VioWrtCellStr ((PCH)Line_Buffer, n, Cursor_Row, Cursor_Col + 1, 0);
# else /* __os2__ */
p = mkScreenPointer (Cursor_Row, SLtt_Screen_Cols - 1);
# if defined (HAS_LINEAR_SCREEN)
/* pmin = p - (n-1); */
pmin = mkScreenPointer (Cursor_Row, Cursor_Col);
while (p-- > pmin) *(p + 1) = *p;
# else
SNOW_CHECK;
asm mov ax, ds
asm mov bx, di
asm mov dx, si
asm mov cx, n
asm les di, p
asm lds si, p
asm sub si, 2
asm std
asm rep movsw
asm mov ds, ax
asm mov di, bx
asm mov si, dx
# endif /* HAS_LINEAR_SCREEN */
# endif /* __os2__ */
# endif /* EMX_VIDEO */
# endif /* WIN32 */
#endif /* not GO32_VIDEO */
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_end_insert (void);
*
* any cleanup after insert a blank column
\*----------------------------------------------------------------------*/
void SLtt_end_insert (void)
{
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_delete_char (void);
*
* delete a single character, moving everything left 1 column to take
* up the room
\*----------------------------------------------------------------------*/
void SLtt_delete_char (void)
{
#if !defined (GO32_VIDEO)
# if defined (HAS_LINEAR_SCREEN) || defined (USE_ASM)
unsigned short *p;
# if defined (HAS_LINEAR_SCREEN)
register unsigned short *p1;
# endif
# endif
int n;
slvid_getxy ();
n = SLtt_Screen_Cols - Cursor_Col - 1;
# ifndef WIN32
# if defined (EMX_VIDEO)
v_getline (Line_Buffer, Cursor_Col+1, Cursor_Row, n);
v_putline (Line_Buffer, Cursor_Col, Cursor_Row, n);
# else /* EMX_VIDEO */
# if defined (__os2__)
n *= 2;
VioReadCellStr ((PCH)Line_Buffer, (USHORT*)&n, Cursor_Row, Cursor_Col + 1, 0);
VioWrtCellStr ((PCH)Line_Buffer, n, Cursor_Row, Cursor_Col, 0);
return;
# else /* __os2__ */
p = mkScreenPointer (Cursor_Row, Cursor_Col);
# if defined (HAS_LINEAR_SCREEN)
while (n--)
{
p1 = p + 1;
*p = *p1;
p++;
}
# else /* HAS_LINEAR_SCREEN */
SNOW_CHECK;
asm mov ax, ds
asm mov bx, si
asm mov dx, di
asm mov cx, n
asm les di, p
asm lds si, p
asm add si, 2
asm cld
asm rep movsw
asm mov ds, ax
asm mov si, bx
asm mov di, dx
# endif /* HAS_LINEAR_SCREEN */
# endif /* __os2__ */
# endif /* EMX_VIDEO */
# endif /* WIN32 */
#endif /* not GO32_VIDEO */
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_erase_line (void);
*
* This function is *only* called on exit.
* It sets attribute byte to Black & White
\*----------------------------------------------------------------------*/
void SLtt_erase_line (void)
{
#ifndef WIN32
# if defined (GO32_VIDEO) || defined (EMX_VIDEO)
Attribute_Byte = 0x07;
slvid_deleol (0);
# else /* GO32_VIDEO or EMX_VIDEO */
# if defined (__os2__)
USHORT w;
Attribute_Byte = 0x07;
w = mkSpaceChar ();
VioWrtNCell ((BYTE*)&w, SLtt_Screen_Cols, Cursor_Row, 0, 0);
# else /* __os2__ */
unsigned short w;
unsigned short *p = mkScreenPointer (Cursor_Row, 0);
# if defined (HAS_LINEAR_SCREEN)
register unsigned short *pmax = p + SLtt_Screen_Cols;
Attribute_Byte = 0x07;
w = mkSpaceChar ();
while (p < pmax) *p++ = w;
# else /* HAS_LINEAR_SCREEN */
Attribute_Byte = 0x07;
w = mkSpaceChar ();
SNOW_CHECK;
asm mov dx, di
asm mov ax, w
asm mov cx, SLtt_Screen_Cols
asm les di, p
asm cld
asm rep stosw
asm mov di, dx
# endif /* HAS_LINEAR_SCREEN */
# endif /* __os2__ */
# endif /* GO32_VIDEO or EMX_VIDEO */
Current_Color = JNO_COLOR; /* since we messed with attribute byte */
#endif /* WIN32 */
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_delete_nlines (int nlines);
*
* delete NLINES by scrolling up the region <Scroll_r1, Scroll_r2>
\*----------------------------------------------------------------------*/
void SLtt_delete_nlines (int nlines)
{
SLtt_normal_video ();
#ifndef WIN32
# if defined (EMX_VIDEO)
v_attrib (Attribute_Byte);
v_scroll (0, Scroll_r1, SLtt_Screen_Cols-1, Scroll_r2, nlines, V_SCROLL_UP);
# else /* EMX_VIDEO */
# if defined (__os2__)
{
Line_Buffer[0] = ' '; Line_Buffer[1] = Attribute_Byte;
VioScrollUp (Scroll_r1, 0, Scroll_r2, SLtt_Screen_Cols-1,
nlines, (PCH) Line_Buffer, 0);
}
# else /* __os2__ */
# if defined (USE_ASM)
/* This has the effect of pulling all lines below it up */
asm mov ax, nlines
asm mov ah, 6 /* int 6h */
asm xor cx, cx
asm mov ch, byte ptr Scroll_r1
asm mov dx, SLtt_Screen_Cols
asm dec dx
asm mov dh, byte ptr Scroll_r2
asm mov bh, byte ptr Attribute_Byte
asm int 10h
# else /* USE_ASM */
{
union REGS r;
# if defined (__WATCOMC__)
r.x.eax = nlines;
r.x.ecx = 0;
# else
r.x.ax = nlines;
r.x.cx = 0;
# endif
r.h.ah = 6;
r.h.ch = Scroll_r1;
r.h.dl = SLtt_Screen_Cols - 1;
r.h.dh = Scroll_r2;
r.h.bh = Attribute_Byte;
int86 (0x10, &r, &r);
}
# endif /* USE_ASM */
# endif /* __os2__ */
# endif /* EMX_VIDEO */
#endif /* WIN32 */
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_reverse_index (int nlines);
*
* scroll down the region <Scroll_r1, Scroll_r2> by NLINES
\*----------------------------------------------------------------------*/
void SLtt_reverse_index (int nlines)
{
SLtt_normal_video ();
#ifndef WIN32
# if defined (EMX_VIDEO)
v_attrib (Attribute_Byte);
v_scroll (0, Scroll_r1, SLtt_Screen_Cols-1, Scroll_r2, nlines,
V_SCROLL_DOWN);
# else /* EMX_VIDEO */
# if defined (__os2__)
{
Line_Buffer[0] = ' '; Line_Buffer[1] = Attribute_Byte;
VioScrollDn (Scroll_r1, 0, Scroll_r2, SLtt_Screen_Cols-1,
nlines, (PCH) Line_Buffer, 0);
}
# else /* __os2__ */
# if defined (USE_ASM)
asm xor cx, cx
asm mov ch, byte ptr Scroll_r1
asm mov dx, SLtt_Screen_Cols
asm dec dx
asm mov dh, byte ptr Scroll_r2
asm mov bh, byte ptr Attribute_Byte
asm mov ah, 7
asm mov al, byte ptr nlines
asm int 10h
# else /* USE_ASM */
{
union REGS r;
r.h.al = nlines;
# if defined (__WATCOMC__)
r.x.ecx = 0;
# else
r.x.cx = 0;
# endif
r.h.ah = 7;
r.h.ch = Scroll_r1;
r.h.dl = SLtt_Screen_Cols - 1;
r.h.dh = Scroll_r2;
r.h.bh = Attribute_Byte;
int86 (0x10, &r, &r);
}
# endif /* USE_ASM */
# endif /* __os2__ */
# endif /* EMX_VIDEO */
#endif /* WIN32 */
}
/*----------------------------------------------------------------------*\
* Function: static void slvid_invert_region (int top_row, int bot_row);
*
* invert the display in the region, top_row <= row < bot_row
\*----------------------------------------------------------------------*/
static void slvid_invert_region (int top_row, int bot_row)
{
#ifndef WIN32
# if defined (EMX_VIDEO)
int row, col;
for (row = top_row; row < bot_row; row++)
{
v_getline (Line_Buffer, 0, row, SLtt_Screen_Cols);
for (col = 1; col < SLtt_Screen_Cols * 2; col += 2)
Line_Buffer [col] ^= 0xff;
v_putline (Line_Buffer, 0, row, SLtt_Screen_Cols);
}
# else /* EMX_VIDEO */
# ifdef __os2__
int row, col;
USHORT length = SLtt_Screen_Cols * 2;
for (row = top_row; row < bot_row; row++)
{
VioReadCellStr ((PCH)Line_Buffer, &length, row, 0, 0);
for (col = 1; col < length; col += 2)
Line_Buffer [col] ^= 0xff;
VioWrtCellStr ((PCH)Line_Buffer, length, row, 0, 0);
}
# else /* __os2__ */
# if defined (__GO32__) || defined (__WATCOMC__)
unsigned char buf [2 * 180 * 80]; /* 180 cols x 80 rows */
unsigned char *b, *bmax;
b = buf + 1 + 2 * SLtt_Screen_Cols * top_row;
bmax = buf + 1 + 2 * SLtt_Screen_Cols * bot_row;
ScreenRetrieve (buf);
while (b < bmax)
{
*b ^= 0xFF;
b += 2;
}
ScreenUpdate (buf);
# else /* __GO32__ or __WATCOMC__ */
register unsigned short ch, sh;
register unsigned short *pmin = mkScreenPointer (top_row, 0);
register unsigned short *pmax = mkScreenPointer (bot_row, 0);
while (pmin < pmax)
{
sh = *pmin;
ch = sh;
ch = ch ^ 0xFF00;
*pmin = (ch & 0xFF00) | (sh & 0x00FF);
pmin++;
}
# endif /* __GO32__ or __WATCOMC__ */
# endif /* __os2__ */
# endif /* EMX_VIDEO */
#endif /* WIN32 */
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_beep (void);
*
* signal error by a "bell" condition, the type of signal is governed
* by the value of SLtt_Ignore_Beep:
*
* 0 silent bell
* 1 audible bell
* 2 visual bell
* 4 special visual bell (only flash the bottom status line)
*
* these may be combined:
* eg, 3 = audible visual bell.
* but if both the visual bell and the "special" visual bell are specified,
* only the special bell is used.
\*----------------------------------------------------------------------*/
void SLtt_beep (void)
{
int audible; /* audible bell */
int special = 0; /* first row to invert */
int visual = 0; /* final row to invert */
if (!SLtt_Ignore_Beep) return;
audible = (SLtt_Ignore_Beep & 1);
if ( (SLtt_Ignore_Beep & 4) )
{
special = SLtt_Screen_Rows - 1;
visual = special--; /* only invert bottom status line */
}
else if ( (SLtt_Ignore_Beep & 2) )
{
visual = SLtt_Screen_Rows;
}
if (visual) slvid_invert_region (special, visual);
#if defined (EMX_VIDEO)
if (audible) /*sound (1500)*/; _sleep2 (100); if (audible) /* nosound () */;
#else
# ifdef __os2__
if (audible) DosBeep (1500, 100); else DosSleep (100);
# elif defined(WIN32)
# else
if (audible) sound (1500); delay (100); if (audible) nosound ();
# endif
#endif
if (visual) slvid_invert_region (special, visual);
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_del_eol (void);
*
* delete from the current cursor position to the end of the row
\*----------------------------------------------------------------------*/
void SLtt_del_eol (void)
{
#ifndef WIN32
# if defined (GO32_VIDEO) || defined (EMX_VIDEO)
if (Current_Color != JNO_COLOR) SLtt_normal_video ();
slvid_deleol (Cursor_Col);
# else /* GO32_VIDEO or EMX_VIDEO */
# ifdef __os2__
USHORT w;
if (Current_Color != JNO_COLOR) SLtt_normal_video ();
w = mkSpaceChar ();
VioWrtNCell ((BYTE*)&w, (SLtt_Screen_Cols - Cursor_Col),
Cursor_Row, Cursor_Col, 0);
# else /* __os2__ */
unsigned short *p = mkScreenPointer (Cursor_Row, Cursor_Col);
int n = SLtt_Screen_Cols - Cursor_Col;
unsigned short w;
# if defined (HAS_LINEAR_SCREEN)
unsigned short *pmax = p + n;
if (Current_Color != JNO_COLOR) SLtt_normal_video ();
w = mkSpaceChar ();
while (p < pmax) *p++ = w;
# else /* HAS_LINEAR_SCREEN */
if (Current_Color != JNO_COLOR) SLtt_normal_video ();
w = mkSpaceChar ();
SNOW_CHECK;
asm mov dx, di
asm les di, p
asm mov ax, w
asm mov cx, n
asm cld
asm rep stosw
asm mov di, dx
# endif /* HAS_LINEAR_SCREEN */
# endif /* __os2__ */
# endif /* GO32_VIDEO or EMX_VIDEO */
#endif /* WIN32 */
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_reverse_video (int color);
*
* set Attribute_Byte corresponding to COLOR.
* Use Current_Color to remember the color which was set.
* convert from the COLOR number to the attribute value.
\*----------------------------------------------------------------------*/
void SLtt_reverse_video (int color)
{
Attribute_Byte = Color_Map [color];
Current_Color = color;
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_normal_video (void);
*
* reset the attributes for normal video
\*----------------------------------------------------------------------*/
void SLtt_normal_video (void)
{
SLtt_reverse_video (JNORMAL_COLOR);
}
#if defined (USE_ASM)
/*----------------------------------------------------------------------*\
* Function: static unsigned short *video_write (register unsigned char *pp,
* register unsigned char *p,
* register unsigned short *pos)
*
* write out (P - PP) characters from the array pointed to by PP
* at position (POS, Cursor_Row) in the current Attribute_Byte
*
* increment POS to reflect the number of characters sent and
* return the it as a pointer
\*----------------------------------------------------------------------*/
static unsigned short *video_write (register unsigned char *pp,
register unsigned char *p,
register unsigned short *pos)
{
int n = (int) (p - pp); /* num of characters of PP to write */
asm push si
asm push ds
asm push di
/* set up register for BOTH fast and slow */
asm mov bx, SLtt_Msdos_Cheap_Video
/* These are the registers needed for both fast AND slow */
asm mov ah, byte ptr Attribute_Byte
asm mov cx, n
asm lds si, dword ptr pp
asm les di, dword ptr pos
asm cld
asm cmp bx, 0 /* cheap video test */
asm je L_fast
asm mov bx, ax
asm mov dx, CGA_STATUS
asm jg L_slow_blank
/* slow video */
asm cli
/* wait for retrace */
L_slow:
asm in al, dx
asm test al, 1
asm jnz L_slow
L_slow1:
asm in al, dx
asm test al, 1
asm jz L_slow1
/* move a character out */
asm mov ah, bh
asm lodsb
asm stosw
asm loop L_slow
asm sti
asm jmp done
/* -------------- slow video, vertical retace and pump --------------*/
L_slow_blank:
L_slow_blank_loop:
asm in al, dx
asm test al, 8
asm jnz L_slow_blank_loop
L_slow_blank1:
asm in al, dx
asm test al, 8
asm jz L_slow_blank1
/* write line */
asm mov ah, bh
L_slow_blank2:
asm lodsb
asm stosw
asm loop L_slow_blank2
asm jmp done
/*-------------- Fast video --------------*/
L_fast:
asm lodsb
asm stosw
asm loop L_fast
done:
asm pop di
asm pop ds
asm pop si
return (pos + n);
}
#endif /* USE_ASM */
/*----------------------------------------------------------------------*\
* Function: static void write_attributes (unsigned short *src,
* int count);
*
* Copy COUNT character/color pairs from the array pointed to by
* SRC to the screen at position (0,Cursor_Row).
* NB: SRC contains character/color pairs -- the color must be converted to
* an ansi attribute.
*
* Write out
* 1) a combination of string/attributes
* 2) each string of continuous colour
*
* approach 2) is used for assembler output, while 1) is used when a higher
* level API is available or direct to memory writing is possible: emx video
* routines, os/2, go32, watcom.
\*----------------------------------------------------------------------*/
static void write_attributes (unsigned short *src, int count)
{
register unsigned char *p = Line_Buffer;
register unsigned short pair;
#ifdef WIN32
register unsigned char * org_src = src;
COORD coord;
long bytes;
#endif
#if !defined (USE_ASM)
# if defined (HAS_LINEAR_SCREEN)
register unsigned short *pos = mkScreenPointer (Cursor_Row, 0);
# endif
int n = count;
/* write into a character/attribute pair */
while (n-- > 0)
{
pair = *(src++); /* character/color pair */
SLtt_reverse_video (pair >> 8); /* color change */
# if defined (HAS_LINEAR_SCREEN)
*(pos++) = ((unsigned short) Attribute_Byte << 8) | pair & 0xff;
# else
# if defined(EMX_VIDEO) || !defined(WIN32)
*(p++) = pair & 0xff; /* character byte */
*(p++) = Attribute_Byte; /* attribute byte */
# else
/* WIN32 for now... */
*(p++) = pair & 0xff;
# endif
# endif
}
# if !defined (HAS_LINEAR_SCREEN)
# if defined (EMX_VIDEO)
v_putline (Line_Buffer, Cursor_Col, Cursor_Row, count);
# else /* EMX_VIDEO */
# if defined (__os2__)
VioWrtCellStr ((PCH)Line_Buffer, (USHORT)(2 * count),
(USHORT)Cursor_Row, (USHORT)Cursor_Col, 0);
# elif defined(WIN32)
/* do color attributes later */
p = Line_Buffer;
coord.X = Cursor_Col;
coord.Y = Cursor_Row;
WriteConsoleOutputCharacter(hStdout, p, count, coord, &bytes);
/* write color attributes */
p = Line_Buffer;
n = count;
src = org_src; /* restart the src pointer */
/* write into attributes only */
while (n-- > 0)
{
pair = *(src++); /* character/color pair */
SLtt_reverse_video (pair >> 8); /* color change */
*(p++) = Attribute_Byte; /* attribute byte */
*(p++) = 0; /* what's this for? */
}
WriteConsoleOutputAttribute(hStdout, Line_Buffer, count, coord, &bytes);
# else /* __os2__ */
/* ScreenUpdateLine (void *virtual_screen_line, int row); */
p = Line_Buffer;
n = Cursor_Col;
while (count-- > 0)
{
ScreenPutChar ((int)p[0], (int)p[1], n++, Cursor_Row);
p += 2;
}
# endif /* EMX_VIDEO */
# endif /* __os2__ */
# endif /* HAS_LINEAR_SCREEN */
#else /* not USE_ASM */
unsigned char ch, color;
register unsigned short *pos = mkScreenPointer (Cursor_Row, 0);
while (count--)
{
pair = *(src++); /* character/color pair */
ch = pair & 0xff; /* character value */
color = pair >> 8; /* color value */
if (color != Current_Color) /* need a new color */
{
if (p != Line_Buffer)
{
pos = video_write (Line_Buffer, p, pos);
p = Line_Buffer;
}
SLtt_reverse_video (color); /* change color */
}
*(p++) = ch;
}
pos = video_write (Line_Buffer, p, pos);
#endif /* not USE_ASM */
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_smart_puts (unsigned short *new_string,
* unsigned short *old_string,
* int len, int row);
*
* puts NEW_STRING, which has length LEN, at row ROW. NEW_STRING contains
* characters/colors packed in the form value = ((color << 8) | (ch));
*
* the puts tries to avoid overwriting the same characters/colors
*
* OLD_STRING is not used, maintained for compatibility with other systems
\*----------------------------------------------------------------------*/
void SLtt_smart_puts (unsigned short *new_string,
unsigned short *old_string,
int len, int row)
{
(void) old_string;
Cursor_Row = row;
Cursor_Col = 0;
write_attributes (new_string, len);
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_reset_video (void);
\*----------------------------------------------------------------------*/
void SLtt_reset_video (void)
{
SLtt_goto_rc (SLtt_Screen_Rows - 1, 0);
#ifdef HAS_SAVE_SCREEN
restore_screen ();
#endif
Attribute_Byte = 0x07;
Current_Color = JNO_COLOR;
SLtt_del_eol ();
}
#if 0
void wide_width (void)
{
}
void narrow_width (void)
{
}
#endif
/*----------------------------------------------------------------------*\
* Function: void SLtt_cls (void);
\*----------------------------------------------------------------------*/
void SLtt_cls (void)
{
#ifdef WIN32
long bytes;
COORD coord;
char ch;
#endif
SLtt_normal_video ();
#if defined (__GO32__) || defined (__WATCOMC__) || defined (EMX_VIDEO)
SLtt_reset_scroll_region ();
SLtt_goto_rc (0, 0);
SLtt_delete_nlines (SLtt_Screen_Rows);
#else /* __GO32__ or __WATCOMC__ or EMX_VIDEO */
# ifdef __os2__
{
Line_Buffer [0] = ' '; Line_Buffer [1] = Attribute_Byte;
VioScrollUp (0, 0, -1, -1, -1, (PCH)Line_Buffer, 0);
}
# elif defined(WIN32)
/* clear the WIN32 screen in one shot */
coord.X = 0;
coord.Y = 0;
ch = ' ';
(void) FillConsoleOutputCharacter(hStdout,
ch,
csbiInfo.dwSize.Y * csbiInfo.dwSize.X,
coord,
&bytes);
/* now set screen to the current attribute */
ch = Attribute_Byte;
(void) FillConsoleOutputAttribute(hStdout,
ch,
csbiInfo.dwSize.Y * csbiInfo.dwSize.X,
coord,
&bytes);
# else /* __os2__ */
asm mov dx, SLtt_Screen_Cols
asm dec dx
asm mov ax, SLtt_Screen_Rows
asm dec ax
asm mov dh, al
asm xor cx, cx
asm xor ax, ax
asm mov ah, 7
asm mov bh, byte ptr Attribute_Byte
asm int 10h
# endif /* __os2__ */
#endif /* __GO32__ or __WATCOMC__ or EMX_VIDEO */
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_putchar (char ch);
*
* put CH on the screen in the current position.
* this function is called assuming that cursor is in correct position
\*----------------------------------------------------------------------*/
void SLtt_putchar (char ch)
{
#if !defined (GO32_VIDEO) && !defined (EMX_VIDEO)
unsigned short p, *pp;
# if defined(WIN32)
long bytes;
# endif
#endif
if (Current_Color) SLtt_normal_video ();
slvid_getxy (); /* get current position */
switch (ch)
{
case 7: /* ^G - break */
SLtt_beep (); break;
case 8: /* ^H - backspace */
SLtt_goto_rc (Cursor_Row, Cursor_Col - 1); break;
case 13: /* ^M - carriage return */
SLtt_goto_rc (Cursor_Row, 0); break;
default: /* write character to screen */
#if defined (EMX_VIDEO)
v_putn (ch, 1);
#else /* EMX_VIDEO */
# ifdef __os2__
VioWrtCharStrAtt (&ch, 1, Cursor_Row, Cursor_Col,
(BYTE*)&Attribute_Byte, 0);
# elif defined(WIN32)
WriteConsole(hStdout, &ch, 1, &bytes, NULL);
# else /* __os2__ */
# ifdef GO32_VIDEO
ScreenPutChar ((int) ch, Attribute_Byte, Cursor_Col, Cursor_Row);
# else /* GO32_VIDEO */
pp = mkScreenPointer (Cursor_Row, Cursor_Col);
p = (Attribute_Byte << 8) | (unsigned char) ch;
# ifdef USE_ASM
SNOW_CHECK;
# endif
*pp = p;
# endif /* GO32_VIDEO */
# endif /* __os2__ */
#endif /* EMX_VIDEO */
SLtt_goto_rc (Cursor_Row, Cursor_Col + 1);
}
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_set_color (int obj, char *what, char *fg, char *bg);
*
* set foreground and background colors of OBJ to the attributes which
* correspond to the names FG and BG, respectively.
*
* WHAT is the name corresponding to the object OBJ, but is not used in
* this routine.
\*----------------------------------------------------------------------*/
void SLtt_set_color (int obj, char *what, char *fg, char *bg)
{
int i, b = -1, f = -1;
#ifdef WIN32
int newcolor;
#endif
(void) what;
if ( !IsColor || (obj < 0) || (obj >= JMAX_COLORS))
return;
for (i = 0; i < JMAX_COLOR_NAMES; i++ )
{
if (!strcmp (fg, Color_Names [i]))
{
f = i;
break;
}
}
for (i = 0; i < JMAX_COLOR_NAMES; i++)
{
if (!strcmp (bg, Color_Names [i]))
{
if (Blink_Killed) b = i; else b = i & 0x7;
break;
}
}
if ((f == -1) || (b == -1) || (f == b)) return;
#if 1
Color_Map [obj] = (b << 4) | f;
#else
/*
0 1 2 3
"black", "blue", "green", "cyan",
4 5 6 7
"red", "magenta", "brown", "lightgray",
8 9 10 11
"gray", "brightblue", "brightgreen", "brightcyan",
12 13 14 15
"brightred", "brightmagenta", "yellow", "white"
*/
/* these aren't all right yet */
switch (f)
{
case 0: newcolor = 0; break;
case 1: newcolor = FOREGROUND_BLUE; break;
case 2: newcolor = FOREGROUND_GREEN; break;
case 3: newcolor = FOREGROUND_GREEN | FOREGROUND_BLUE; break;
case 4: newcolor = FOREGROUND_RED; break;
case 5: newcolor = FOREGROUND_RED | FOREGROUND_BLUE; break;
case 6: newcolor = FOREGROUND_GREEN | FOREGROUND_RED; break;
case 7: newcolor = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY; break;
case 8: newcolor = FOREGROUND_BLUE | FOREGROUND_RED | FOREGROUND_GREEN; break;
case 9: newcolor = FOREGROUND_BLUE | FOREGROUND_INTENSITY; break;
case 10: newcolor = FOREGROUND_GREEN | FOREGROUND_INTENSITY; break;
case 11: newcolor = FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY; break;
case 12: newcolor = FOREGROUND_RED | FOREGROUND_INTENSITY; break;
case 13: newcolor = FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_INTENSITY; break;
case 14: newcolor = FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY; break;
case 15: newcolor = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY; break;
}
/* switch (f) */
/*
0 1 2 3
"black", "blue", "green", "cyan",
4 5 6 7
"red", "magenta", "brown", "lightgray",
8 9 10 11
"gray", "brightblue", "brightgreen", "brightcyan",
12 13 14 15
"brightred", "brightmagenta", "yellow", "white"
*/
switch (b)
{
case 0: newcolor |= 0; break;
case 1: newcolor |= BACKGROUND_BLUE; break;
case 2: newcolor |= BACKGROUND_GREEN; break;
case 3: newcolor |= BACKGROUND_GREEN | BACKGROUND_BLUE; break;
case 4: newcolor |= BACKGROUND_RED; break;
case 5: newcolor |= BACKGROUND_RED | BACKGROUND_BLUE; break;
case 6: newcolor |= BACKGROUND_GREEN | BACKGROUND_RED; break;
case 7: newcolor |= BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY; break;
case 8: newcolor |= BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE; break;
case 9: newcolor |= BACKGROUND_BLUE | BACKGROUND_INTENSITY; break;
case 10: newcolor |= BACKGROUND_GREEN | BACKGROUND_INTENSITY; break;
case 11: newcolor |= BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY; break;
case 12: newcolor |= BACKGROUND_RED | BACKGROUND_INTENSITY; break;
case 13: newcolor |= BACKGROUND_RED | BACKGROUND_BLUE | BACKGROUND_INTENSITY; break;
case 14: newcolor |= BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY; break;
case 15: newcolor |= BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY; break;
}
/* switch (b) */
Color_Map [obj] = newcolor;
#endif
/* if we're setting the normal color, and the attribute byte hasn't
been set yet, set it to the new color */
if ((obj == 0) && (Attribute_Byte == 0))
SLtt_reverse_video (0);
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_get_terminfo (void)
\*----------------------------------------------------------------------*/
void SLtt_get_terminfo (void)
{
#ifdef WIN32
SLtt_Screen_Rows = csbiInfo.dwSize.Y;
SLtt_Screen_Cols = csbiInfo.dwSize.X;
#endif
#ifdef GO32_VIDEO
SLtt_Screen_Rows = ScreenRows ();
SLtt_Screen_Cols = ScreenCols ();
#endif
}
/*----------------------------------------------------------------------*\
* Function: void SLtt_init_video (void);
\*----------------------------------------------------------------------*/
void SLtt_init_video (void)
{
#if defined (EMX_VIDEO)
int OldCol, OldRow;
#endif
#ifdef HAS_SAVE_SCREEN
save_screen ();
#endif
Cursor_Row = Cursor_Col = 0;
#if defined (EMX_VIDEO)
v_init ();
if ( v_hardware () != V_MONOCHROME ) IsColor = 1; else IsColor = 0;
v_getxy(&OldCol,&OldRow);
v_gotoxy (0, 0);
if (IsColor)
{
if (_osmode == OS2_MODE)
{
# if 0
/* Enable high-intensity background colors */
VIOINTENSITY RequestBlock;
RequestBlock.cb = sizeof (RequestBlock);
RequestBlock.type = 2; RequestBlock.fs = 1;
VioSetState (&RequestBlock, 0); /* nop if !fullscreen */
# endif
Blink_Killed = 1;
}
else
{
Blink_Killed = 1; /* seems to work */
}
}
if (!Attribute_Byte)
{
/* find the attribute currently under the cursor */
v_getline (Line_Buffer, OldCol, OldRow, 1);
Attribute_Byte = Line_Buffer[1];
set_color_from_attribute (Attribute_Byte);
}
v_attrib (Attribute_Byte);
/* SLtt_Term_Cannot_Insert = 1; */
#else /* EMX_VIDEO */
# ifdef __os2__
IsColor = 1; /* is it really? */
{
/* Enable high-intensity background colors */
VIOINTENSITY RequestBlock;
RequestBlock.cb = sizeof (RequestBlock);
RequestBlock.type = 2; RequestBlock.fs = 1;
VioSetState (&RequestBlock, 0); /* nop if !fullscreen */
Blink_Killed = 1;
}
if (!Attribute_Byte)
{
/* find the attribute currently under the cursor */
USHORT Length = 2, Row, Col;
VioGetCurPos (&Row, &Col, 0);
VioReadCellStr ((PCH)Line_Buffer, &Length, Row, Col, 0);
Attribute_Byte = Line_Buffer[1];
set_color_from_attribute (Attribute_Byte);
}
# elif defined(WIN32)
/* initialize the WIN32 console */
IsColor = 1; /* yes, the WIN32 console can do color (on a color monitor) */
# else
# if defined (__GO32__) || defined (__WATCOMC__)
# ifdef GO32_VIDEO
SLtt_Term_Cannot_Insert = 1;
# else
Video_Base = (unsigned char *) ScreenPrimary;
# endif
if (!Attribute_Byte) Attribute_Byte = 0x17;
IsColor = 1; /* is it really? */
if (IsColor)
{
union REGS r;
# ifdef __WATCOMC__
r.x.eax = 0x1003; r.x.ebx = 0;
# else
r.x.ax = 0x1003; r.x.bx = 0;
# endif
int86 (0x10, &r, &r);
Blink_Killed = 1;
}
# else /* (__GO32__ or __WATCOMC__ */
{
unsigned char *p = (unsigned char far *) 0x00400049L;
if (*p == 7)
{
Video_Status_Port = MONO_STATUS;
Video_Base = (unsigned char *) MK_FP (0xb000,0000);
IsColor = 0;
}
else
{
Video_Status_Port = CGA_STATUS;
Video_Base = (unsigned char *) MK_FP (0xb800,0000);
IsColor = 1;
}
}
/* test for video adapter type. Of primary interest is whether there is
* snow or not. Assume snow if the card is color and not EGA or greater.
*/
/* Use Ralf Brown test for EGA or greater */
asm mov ah, 0x12
asm mov bl, 0x10
asm mov bh, 0xFF
asm int 10h
asm cmp bh, 0xFF
asm je L1
/* (V)EGA */
asm xor bx, bx
asm mov SLtt_Msdos_Cheap_Video, bx
asm mov ax, Attribute_Byte
asm cmp ax, bx
asm jne L2
asm mov ax, 0x17
asm mov Attribute_Byte, ax
asm jmp L2
L1:
/* Not (V)EGA */
asm mov ah, 0x0F
asm int 10h
asm cmp al, 7
asm je L3
asm mov ax, 1
asm mov SLtt_Msdos_Cheap_Video, ax
L3:
asm mov ax, Attribute_Byte
asm cmp ax, 0
asm jne L2
asm mov ax, 0x07
asm mov Attribute_Byte, ax
L2:
/* toggle the blink bit so we can use hi intensity background */
if (IsColor && !SLtt_Msdos_Cheap_Video)
{
asm mov ax, 0x1003
asm mov bx, 0
asm int 0x10
Blink_Killed = 1;
}
# endif /* __GO32__ or __WATCOMC__ */
# endif /* __os2__ */
#endif /* EMX_VIDEO */
SLtt_set_scroll_region (0, SLtt_Screen_Rows);
SLtt_Use_Ansi_Colors = IsColor;
}
/*----------------------------------------------------------------------*\
* Function: int SLtt_flush_output (void);
\*----------------------------------------------------------------------*/
int SLtt_flush_output (void)
{
fflush (stdout);
return -1;
}
int SLtt_set_cursor_visibility (int show)
{
(void) show;
return -1;
}
void SLtt_set_mono (int obj_unused, char *unused, SLtt_Char_Type c_unused)
{
(void) obj_unused;
(void) unused;
(void) c_unused;
}
/* /////////////////////// end of file (c source) ///////////////////// */
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