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1185 lines
24 KiB
C
1185 lines
24 KiB
C
/* SLang Screen management routines */
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/* Copyright (c) 1992, 1995 John E. Davis
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* All rights reserved.
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Perl Artistic License.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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#include "slang.h"
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#include "_slang.h"
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typedef struct Screen_Type
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{
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int n; /* number of chars written last time */
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int flags; /* line untouched, etc... */
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unsigned short *old, *neew;
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#ifndef pc_system
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unsigned long old_hash, new_hash;
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#endif
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}
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Screen_Type;
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#define TOUCHED 0x1
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#define TRASHED 0x2
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#ifndef pc_system
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#define MAX_SCREEN_SIZE 120
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#else
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#define MAX_SCREEN_SIZE 75
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#endif
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Screen_Type SL_Screen[MAX_SCREEN_SIZE];
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static int Start_Col, Start_Row;
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static int Screen_Cols, Screen_Rows;
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static int This_Row, This_Col;
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static int This_Color; /* only the first 8 bits of this
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* are used. The highest bit is used
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* to indicate an alternate character
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* set. This leaves 127 userdefineable
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* color combination.
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*/
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#ifndef pc_system
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#define ALT_CHAR_FLAG 0x80
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#else
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#define ALT_CHAR_FLAG 0x00
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#endif
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int SLsmg_Newline_Moves = 0;
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int SLsmg_Backspace_Moves = 0;
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static void blank_line (unsigned short *p, int n, unsigned char ch)
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{
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register unsigned short *pmax = p + n;
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register unsigned short color_ch;
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color_ch = (This_Color << 8) | (unsigned short) ch;
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while (p < pmax)
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{
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*p++ = color_ch;
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}
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}
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static void clear_region (int row, int n)
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{
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int i;
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int imax = row + n;
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if (imax > Screen_Rows) imax = Screen_Rows;
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for (i = row; i < imax; i++)
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{
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if (i >= 0)
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{
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blank_line (SL_Screen[i].neew, Screen_Cols, ' ');
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SL_Screen[i].flags |= TOUCHED;
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}
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}
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}
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void SLsmg_erase_eol (void)
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{
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int r, c;
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c = This_Col - Start_Col;
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r = This_Row - Start_Row;
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if ((r < 0) || (r >= Screen_Rows)) return;
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if (c < 0) c = 0; else if (c >= Screen_Cols) return;
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blank_line (SL_Screen[This_Row].neew + c , Screen_Cols - c, ' ');
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SL_Screen[This_Row].flags |= TOUCHED;
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}
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static void scroll_up (void)
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{
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unsigned int i, imax;
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unsigned short *neew;
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neew = SL_Screen[0].neew;
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imax = Screen_Rows - 1;
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for (i = 0; i < imax; i++)
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{
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SL_Screen[i].neew = SL_Screen[i + 1].neew;
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SL_Screen[i].flags |= TOUCHED;
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}
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SL_Screen[i].neew = neew;
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SL_Screen[i].flags |= TOUCHED;
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blank_line (neew, Screen_Cols, ' ');
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This_Row--;
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}
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void SLsmg_gotorc (int r, int c)
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{
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This_Row = r;
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This_Col = c;
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}
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int SLsmg_get_row (void)
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{
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return This_Row;
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}
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int SLsmg_get_column (void)
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{
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return This_Col;
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}
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void SLsmg_erase_eos (void)
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{
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SLsmg_erase_eol ();
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clear_region (This_Row + 1, Screen_Rows);
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}
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static int This_Alt_Char;
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#ifndef pc_system
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void SLsmg_set_char_set (int i)
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{
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if (SLtt_Use_Blink_For_ACS) return; /* alt chars not used and the alt bit
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* is used to indicate a blink.
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*/
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if (i) This_Alt_Char = ALT_CHAR_FLAG;
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else This_Alt_Char = 0;
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This_Color &= 0x7F;
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This_Color |= This_Alt_Char;
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}
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#endif
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void SLsmg_set_color (int color)
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{
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if (color < 0) return;
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This_Color = color | This_Alt_Char;
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}
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void SLsmg_reverse_video (void)
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{
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SLsmg_set_color (1);
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}
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void SLsmg_normal_video (void)
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{
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This_Color = This_Alt_Char; /* reset video but NOT char set. */
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}
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static int point_visible (int col_too)
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{
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return ((This_Row >= Start_Row) && (This_Row < Start_Row + Screen_Rows)
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&& ((col_too == 0)
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|| ((This_Col >= Start_Col)
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&& (This_Col < Start_Col + Screen_Cols))));
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}
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void SLsmg_printf (char *fmt, ...)
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{
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char p[1000];
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va_list ap;
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va_start(ap, fmt);
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(void) vsprintf(p, fmt, ap);
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va_end(ap);
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SLsmg_write_string (p);
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}
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void SLsmg_write_string (char *str)
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{
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SLsmg_write_nchars (str, strlen (str));
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}
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void SLsmg_write_nstring (char *str, int n)
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{
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int width;
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char blank = ' ';
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if (str == NULL) width = 0;
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else
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{
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width = strlen (str);
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if (width > n) width = n;
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SLsmg_write_nchars (str, width);
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}
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while (width++ < n) SLsmg_write_nchars (&blank, 1);
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}
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void SLsmg_write_wrapped_string (char *s, int r, int c, int dr, int dc, int fill)
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{
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register char ch, *p;
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int maxc = dc;
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if ((dr == 0) || (dc == 0)) return;
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p = s;
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dc = 0;
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while (1)
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{
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ch = *p++;
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if ((ch == 0) || (ch == '\n'))
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{
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int diff;
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diff = maxc - dc;
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SLsmg_gotorc (r, c);
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SLsmg_write_nchars (s, dc);
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if (fill && (diff > 0))
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{
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while (diff--) SLsmg_write_char (' ');
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}
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if ((ch == 0) || (dr == 1)) break;
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r++;
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dc = 0;
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dr--;
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s = p;
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}
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else if (dc == maxc)
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{
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SLsmg_gotorc (r, c);
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SLsmg_write_nchars (s, dc + 1);
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if (dr == 1) break;
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r++;
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dc = 0;
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dr--;
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s = p;
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}
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else dc++;
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}
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}
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int SLsmg_Tab_Width = 8;
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/* Minimum value for which eight bit char is displayed as is. */
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#ifndef pc_system
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int SLsmg_Display_Eight_Bit = 160;
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static unsigned char Alt_Char_Set[129];/* 129th is used as a flag */
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#else
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int SLsmg_Display_Eight_Bit = 128;
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#endif
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void SLsmg_write_nchars (char *str, int n)
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{
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register unsigned short *p, old, neew, color;
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unsigned char ch;
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unsigned int flags;
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int len, start_len, max_len;
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char *str_max;
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int newline_flag;
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#ifndef pc_system
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int alt_char_set_flag;
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alt_char_set_flag = ((SLtt_Use_Blink_For_ACS == 0)
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&& (This_Color & ALT_CHAR_FLAG));
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#endif
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str_max = str + n;
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color = This_Color << 8;
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top: /* get here only on newline */
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newline_flag = 0;
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start_len = Start_Col;
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if (point_visible (0) == 0) return;
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len = This_Col;
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max_len = start_len + Screen_Cols;
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p = SL_Screen[This_Row].neew;
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if (len > start_len) p += (len - start_len);
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flags = SL_Screen[This_Row].flags;
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while ((len < max_len) && (str < str_max))
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{
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ch = (unsigned char) *str++;
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#ifndef pc_system
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if (alt_char_set_flag)
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ch = Alt_Char_Set [ch & 0x7F];
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#endif
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if (((ch >= ' ') && (ch < 127))
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|| (ch >= (unsigned char) SLsmg_Display_Eight_Bit)
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#ifndef pc_system
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|| alt_char_set_flag
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#endif
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)
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{
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len += 1;
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if (len > start_len)
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{
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old = *p;
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neew = color | (unsigned short) ch;
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if (old != neew)
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{
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flags |= TOUCHED;
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*p = neew;
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}
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p++;
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}
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}
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else if ((ch == '\t') && (SLsmg_Tab_Width > 0))
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{
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n = len;
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n += SLsmg_Tab_Width;
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n = SLsmg_Tab_Width - (n % SLsmg_Tab_Width);
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if (len + n > max_len) n = max_len - len;
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neew = color | (unsigned short) ' ';
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while (n--)
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{
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len += 1;
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if (len > start_len)
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{
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if (*p != neew)
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{
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flags |= TOUCHED;
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*p = neew;
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}
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p++;
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}
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}
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}
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else if (ch == '\n')
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{
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newline_flag = 1;
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break;
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}
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else if ((ch == 0x8) && SLsmg_Backspace_Moves)
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{
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if (len != 0) len--;
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}
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else
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{
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if (ch & 0x80)
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{
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neew = color | (unsigned short) '~';
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len += 1;
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if (len > start_len)
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{
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if (*p != neew)
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{
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*p = neew;
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flags |= TOUCHED;
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}
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p++;
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if (len == max_len) break;
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ch &= 0x7F;
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}
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}
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len += 1;
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if (len > start_len)
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{
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neew = color | (unsigned short) '^';
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if (*p != neew)
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{
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*p = neew;
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flags |= TOUCHED;
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}
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p++;
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if (len == max_len) break;
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}
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if (ch == 127) ch = '?'; else ch = ch + '@';
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len++;
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if (len > start_len)
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{
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neew = color | (unsigned short) ch;
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if (*p != neew)
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{
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*p = neew;
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flags |= TOUCHED;
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}
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p++;
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}
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}
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}
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SL_Screen[This_Row].flags = flags;
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This_Col = len;
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if (SLsmg_Newline_Moves == 0)
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return;
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if (newline_flag == 0)
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{
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while (str < str_max)
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{
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if (*str == '\n') break;
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str++;
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}
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if (str == str_max) return;
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str++;
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}
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This_Row++;
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This_Col = 0;
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if (This_Row == Start_Row + Screen_Rows)
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{
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if (SLsmg_Newline_Moves > 0) scroll_up ();
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}
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goto top;
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}
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void SLsmg_write_char (char ch)
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{
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SLsmg_write_nchars (&ch, 1);
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}
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static int Cls_Flag;
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void SLsmg_cls (void)
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{
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This_Color = 0;
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clear_region (0, Screen_Rows);
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This_Color = This_Alt_Char;
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Cls_Flag = 1;
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}
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#if 0
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static void do_copy (unsigned short *a, unsigned short *b)
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{
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unsigned short *amax = a + Screen_Cols;
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while (a < amax) *a++ = *b++;
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}
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#endif
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#ifndef pc_system
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int SLsmg_Scroll_Hash_Border = 0;
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static unsigned long compute_hash (unsigned short *s, int n)
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{
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register unsigned long h = 0, g;
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register unsigned long sum = 0;
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register unsigned short *smax, ch;
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int is_blank = 2;
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s += SLsmg_Scroll_Hash_Border;
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smax = s + (n - SLsmg_Scroll_Hash_Border);
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while (s < smax)
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{
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ch = *s++;
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if (is_blank && ((ch & 0xFF) != 32)) is_blank--;
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sum += ch;
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h = sum + (h << 3);
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if ((g = h & 0xE0000000UL) != 0)
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{
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h = h ^ (g >> 24);
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h = h ^ g;
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}
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}
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if (is_blank) return 0;
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return h;
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}
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static unsigned long Blank_Hash;
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static void try_scroll (void)
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{
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int i, j, di, r1, r2, rmin, rmax;
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unsigned long hash;
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int color, did_scroll = 0;
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unsigned short *tmp;
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int ignore;
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/* find region limits. */
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for (rmax = Screen_Rows - 1; rmax > 0; rmax--)
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{
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if (SL_Screen[rmax].new_hash != SL_Screen[rmax].old_hash)
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{
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r1 = rmax - 1;
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if ((r1 == 0)
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|| (SL_Screen[r1].new_hash != SL_Screen[r1].old_hash))
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break;
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rmax = r1;
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}
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}
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for (rmin = 0; rmin < rmax; rmin++)
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{
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if (SL_Screen[rmin].new_hash != SL_Screen[rmin].old_hash)
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{
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r1 = rmin + 1;
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if ((r1 == rmax)
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|| (SL_Screen[r1].new_hash != SL_Screen[r1].old_hash))
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break;
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rmin = r1;
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}
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}
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for (i = rmax; i > rmin; i--)
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{
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hash = SL_Screen[i].new_hash;
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if (hash == Blank_Hash) continue;
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if ((hash == SL_Screen[i].old_hash)
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|| ((i + 1 < Screen_Rows) && (hash == SL_Screen[i + 1].old_hash))
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|| ((i - 1 > rmin) && (SL_Screen[i].old_hash == SL_Screen[i - 1].new_hash)))
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continue;
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for (j = i - 1; j >= rmin; j--)
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{
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if (hash == SL_Screen[j].old_hash) break;
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}
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if (j < rmin) continue;
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r2 = i; /* end scroll region */
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di = i - j;
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j--;
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ignore = 0;
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while ((j >= rmin) && (SL_Screen[j].old_hash == SL_Screen[j + di].new_hash))
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{
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if (SL_Screen[j].old_hash == Blank_Hash) ignore++;
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j--;
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}
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r1 = j + 1;
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/* If this scroll only scrolls this line into place, don't do it.
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*/
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if ((di > 1) && (r1 + di + ignore == r2)) continue;
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/* If there is anything in the scrolling region that is ok, abort the
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* scroll.
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*/
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for (j = r1; j <= r2; j++)
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{
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if ((SL_Screen[j].old_hash != Blank_Hash)
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&& (SL_Screen[j].old_hash == SL_Screen[j].new_hash))
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{
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/* See if the scroll is happens to scroll this one into place. */
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if ((j + di > r2) || (SL_Screen[j].old_hash != SL_Screen[j + di].new_hash))
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break;
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}
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}
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if (j <= r2) continue;
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color = This_Color; This_Color = 0;
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did_scroll = 1;
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SLtt_normal_video ();
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SLtt_set_scroll_region (r1, r2);
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SLtt_goto_rc (0, 0);
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SLtt_reverse_index (di);
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SLtt_reset_scroll_region ();
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/* Now we have a hole in the screen. Make the virtual screen look
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* like it.
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*/
|
|
for (j = r1; j <= r2; j++) SL_Screen[j].flags = TOUCHED;
|
|
|
|
while (di--)
|
|
{
|
|
tmp = SL_Screen[r2].old;
|
|
for (j = r2; j > r1; j--)
|
|
{
|
|
SL_Screen[j].old = SL_Screen[j - 1].old;
|
|
SL_Screen[j].old_hash = SL_Screen[j - 1].old_hash;
|
|
}
|
|
SL_Screen[r1].old = tmp;
|
|
blank_line (SL_Screen[r1].old, Screen_Cols, ' ');
|
|
SL_Screen[r1].old_hash = Blank_Hash;
|
|
r1++;
|
|
}
|
|
This_Color = color;
|
|
}
|
|
if (did_scroll) return;
|
|
|
|
/* Try other direction */
|
|
|
|
for (i = rmin; i < rmax; i++)
|
|
{
|
|
hash = SL_Screen[i].new_hash;
|
|
if (hash == Blank_Hash) continue;
|
|
if (hash == SL_Screen[i].old_hash) continue;
|
|
|
|
/* find a match further down screen */
|
|
for (j = i + 1; j <= rmax; j++)
|
|
{
|
|
if (hash == SL_Screen[j].old_hash) break;
|
|
}
|
|
if (j > rmax) continue;
|
|
|
|
r1 = i; /* beg scroll region */
|
|
di = j - i; /* number of lines to scroll */
|
|
j++; /* since we know this is a match */
|
|
|
|
/* find end of scroll region */
|
|
ignore = 0;
|
|
while ((j <= rmax) && (SL_Screen[j].old_hash == SL_Screen[j - di].new_hash))
|
|
{
|
|
if (SL_Screen[j].old_hash == Blank_Hash) ignore++;
|
|
j++;
|
|
}
|
|
r2 = j - 1; /* end of scroll region */
|
|
|
|
/* If this scroll only scrolls this line into place, don't do it.
|
|
*/
|
|
if ((di > 1) && (r1 + di + ignore == r2)) continue;
|
|
|
|
/* If there is anything in the scrolling region that is ok, abort the
|
|
* scroll.
|
|
*/
|
|
|
|
for (j = r1; j <= r2; j++)
|
|
{
|
|
if ((SL_Screen[j].old_hash != Blank_Hash)
|
|
&& (SL_Screen[j].old_hash == SL_Screen[j].new_hash))
|
|
{
|
|
if ((j - di < r1) || (SL_Screen[j].old_hash != SL_Screen[j - di].new_hash))
|
|
break;
|
|
}
|
|
|
|
}
|
|
if (j <= r2) continue;
|
|
|
|
color = This_Color; This_Color = 0;
|
|
SLtt_normal_video ();
|
|
SLtt_set_scroll_region (r1, r2);
|
|
SLtt_goto_rc (0, 0); /* relative to scroll region */
|
|
SLtt_delete_nlines (di);
|
|
SLtt_reset_scroll_region ();
|
|
/* Now we have a hole in the screen. Make the virtual screen look
|
|
* like it.
|
|
*/
|
|
for (j = r1; j <= r2; j++) SL_Screen[j].flags = TOUCHED;
|
|
|
|
while (di--)
|
|
{
|
|
tmp = SL_Screen[r1].old;
|
|
for (j = r1; j < r2; j++)
|
|
{
|
|
SL_Screen[j].old = SL_Screen[j + 1].old;
|
|
SL_Screen[j].old_hash = SL_Screen[j + 1].old_hash;
|
|
}
|
|
SL_Screen[r2].old = tmp;
|
|
blank_line (SL_Screen[r2].old, Screen_Cols, ' ');
|
|
SL_Screen[r2].old_hash = Blank_Hash;
|
|
r2--;
|
|
}
|
|
This_Color = color;
|
|
}
|
|
}
|
|
|
|
#endif /* NOT pc_system */
|
|
|
|
|
|
|
|
static int Smg_Inited;
|
|
|
|
void SLsmg_refresh (void)
|
|
{
|
|
int i;
|
|
|
|
if (Smg_Inited == 0) return;
|
|
#ifndef pc_system
|
|
for (i = 0; i < Screen_Rows; i++)
|
|
{
|
|
if (SL_Screen[i].flags == 0) continue;
|
|
SL_Screen[i].new_hash = compute_hash (SL_Screen[i].neew, Screen_Cols);
|
|
}
|
|
#endif
|
|
|
|
if (Cls_Flag)
|
|
{
|
|
SLtt_normal_video (); SLtt_cls ();
|
|
}
|
|
#ifndef pc_system
|
|
else if (SLtt_Term_Cannot_Scroll == 0) try_scroll ();
|
|
#endif
|
|
|
|
for (i = 0; i < Screen_Rows; i++)
|
|
{
|
|
int trashed;
|
|
|
|
if (SL_Screen[i].flags == 0) continue;
|
|
|
|
if (SL_Screen[i].flags & TRASHED)
|
|
{
|
|
SLtt_goto_rc (i, -1); /* Force cursor to move */
|
|
SLtt_goto_rc (i, 0);
|
|
if (Cls_Flag == 0) SLtt_del_eol ();
|
|
trashed = 1;
|
|
}
|
|
else trashed = 0;
|
|
|
|
if (Cls_Flag || trashed)
|
|
{
|
|
int color = This_Color;
|
|
This_Color = 0;
|
|
blank_line (SL_Screen[i].old, Screen_Cols, ' ');
|
|
This_Color = color;
|
|
}
|
|
|
|
SL_Screen[i].old[Screen_Cols] = 0;
|
|
SL_Screen[i].neew[Screen_Cols] = 0;
|
|
|
|
SLtt_smart_puts (SL_Screen[i].neew, SL_Screen[i].old, Screen_Cols, i);
|
|
|
|
SLMEMCPY ((char *) SL_Screen[i].old, (char *) SL_Screen[i].neew,
|
|
Screen_Cols * sizeof (short));
|
|
|
|
SL_Screen[i].flags = 0;
|
|
#ifndef pc_system
|
|
SL_Screen[i].old_hash = SL_Screen[i].new_hash;
|
|
#endif
|
|
}
|
|
|
|
if (point_visible (1)) SLtt_goto_rc (This_Row - Start_Row, This_Col - Start_Col);
|
|
SLtt_flush_output ();
|
|
Cls_Flag = 0;
|
|
}
|
|
|
|
static int compute_clip (int row, int n, int box_start, int box_end,
|
|
int *rmin, int *rmax)
|
|
{
|
|
int row_max;
|
|
|
|
if (n < 0) return 0;
|
|
if (row >= box_end) return 0;
|
|
row_max = row + n;
|
|
if (row_max <= box_start) return 0;
|
|
|
|
if (row < box_start) row = box_start;
|
|
if (row_max >= box_end) row_max = box_end;
|
|
*rmin = row;
|
|
*rmax = row_max;
|
|
return 1;
|
|
}
|
|
|
|
void SLsmg_touch_lines (int row, int n)
|
|
{
|
|
int i;
|
|
int r1, r2;
|
|
|
|
if (0 == compute_clip (row, n, Start_Row, Start_Row + Screen_Rows, &r1, &r2))
|
|
return;
|
|
|
|
r1 -= Start_Row;
|
|
r2 -= Start_Row;
|
|
for (i = r1; i < r2; i++)
|
|
{
|
|
SL_Screen[i].flags |= TRASHED;
|
|
}
|
|
}
|
|
|
|
#ifndef pc_system
|
|
static char Fake_Alt_Char_Pairs [] = "a:j+k+l+m+q-t+u+v+w+x|";
|
|
|
|
static void init_alt_char_set (void)
|
|
{
|
|
int i;
|
|
unsigned char *p, *pmax, ch;
|
|
|
|
if (Alt_Char_Set[128] == 128) return;
|
|
|
|
i = 32;
|
|
memset ((char *)Alt_Char_Set, ' ', i);
|
|
while (i <= 128)
|
|
{
|
|
Alt_Char_Set [i] = i;
|
|
i++;
|
|
}
|
|
|
|
/* Map to VT100 */
|
|
if (SLtt_Has_Alt_Charset)
|
|
{
|
|
p = (unsigned char *) SLtt_Graphics_Char_Pairs;
|
|
if (p == NULL) return;
|
|
}
|
|
else p = (unsigned char *) Fake_Alt_Char_Pairs;
|
|
pmax = p + strlen ((char *) p);
|
|
|
|
/* Some systems have messed up entries for this */
|
|
while (p < pmax)
|
|
{
|
|
ch = *p++;
|
|
ch &= 0x7F; /* should be unnecessary */
|
|
Alt_Char_Set [ch] = *p;
|
|
p++;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifndef pc_system
|
|
# define BLOCK_SIGNALS SLsig_block_signals ();
|
|
# define UNBLOCK_SIGNALS SLsig_unblock_signals ();
|
|
#else
|
|
# define BLOCK_SIGNALS
|
|
# define UNBLOCK_SIGNALS
|
|
#endif
|
|
|
|
static int Smg_Suspended;
|
|
void SLsmg_suspend_smg (void)
|
|
{
|
|
BLOCK_SIGNALS
|
|
|
|
if (Smg_Suspended == 0)
|
|
{
|
|
SLtt_reset_video ();
|
|
Smg_Suspended = 1;
|
|
}
|
|
|
|
UNBLOCK_SIGNALS
|
|
}
|
|
|
|
void SLsmg_resume_smg (void)
|
|
{
|
|
int i;
|
|
BLOCK_SIGNALS
|
|
|
|
if (Smg_Suspended == 0)
|
|
{
|
|
UNBLOCK_SIGNALS
|
|
return;
|
|
}
|
|
|
|
Smg_Suspended = 0;
|
|
SLtt_init_video ();
|
|
Cls_Flag = 1;
|
|
for (i = 0; i < Screen_Rows; i++)
|
|
SL_Screen[i].flags |= TRASHED;
|
|
SLsmg_refresh ();
|
|
|
|
UNBLOCK_SIGNALS
|
|
}
|
|
|
|
int SLsmg_init_smg (void)
|
|
{
|
|
int i, len;
|
|
unsigned short *old, *neew;
|
|
BLOCK_SIGNALS
|
|
|
|
if (Smg_Inited) SLsmg_reset_smg ();
|
|
SLtt_init_video ();
|
|
Screen_Cols = SLtt_Screen_Cols;
|
|
Screen_Rows = SLtt_Screen_Rows;
|
|
This_Col = This_Row = Start_Col = Start_Row = 0;
|
|
|
|
This_Color = 0;
|
|
This_Alt_Char = 0;
|
|
Cls_Flag = 1;
|
|
#ifndef pc_system
|
|
init_alt_char_set ();
|
|
#endif
|
|
len = Screen_Cols + 3;
|
|
for (i = 0; i < Screen_Rows; i++)
|
|
{
|
|
if ((NULL == (old = (unsigned short *) SLMALLOC (sizeof(short) * len)))
|
|
|| ((NULL == (neew = (unsigned short *) SLMALLOC (sizeof(short) * len)))))
|
|
{
|
|
SLang_Error = SL_MALLOC_ERROR;
|
|
UNBLOCK_SIGNALS
|
|
return 0;
|
|
}
|
|
blank_line (old, len, ' ');
|
|
blank_line (neew, len, ' ');
|
|
SL_Screen[i].old = old;
|
|
SL_Screen[i].neew = neew;
|
|
SL_Screen[i].flags = 0;
|
|
#ifndef pc_system
|
|
Blank_Hash = compute_hash (old, Screen_Cols);
|
|
SL_Screen[i].new_hash = SL_Screen[i].old_hash = Blank_Hash;
|
|
#endif
|
|
}
|
|
Smg_Inited = 1;
|
|
UNBLOCK_SIGNALS
|
|
return 1;
|
|
}
|
|
|
|
|
|
void SLsmg_reset_smg (void)
|
|
{
|
|
int i;
|
|
BLOCK_SIGNALS
|
|
|
|
if (Smg_Inited == 0)
|
|
{
|
|
UNBLOCK_SIGNALS
|
|
return;
|
|
}
|
|
for (i = 0; i < Screen_Rows; i++)
|
|
{
|
|
if (SL_Screen[i].old != NULL) SLFREE (SL_Screen[i].old);
|
|
if (SL_Screen[i].neew != NULL) SLFREE (SL_Screen[i].neew);
|
|
SL_Screen[i].old = SL_Screen[i].neew = NULL;
|
|
}
|
|
SLtt_reset_video ();
|
|
This_Alt_Char = This_Color = 0;
|
|
Smg_Inited = 0;
|
|
|
|
UNBLOCK_SIGNALS
|
|
}
|
|
|
|
|
|
unsigned short SLsmg_char_at (void)
|
|
{
|
|
if (point_visible (1))
|
|
{
|
|
return SL_Screen[This_Row - Start_Row].neew[This_Col - Start_Col];
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
void SLsmg_vprintf (char *fmt, va_list ap)
|
|
{
|
|
char p[1000];
|
|
|
|
(void) vsprintf(p, fmt, ap);
|
|
|
|
SLsmg_write_string (p);
|
|
}
|
|
|
|
void SLsmg_set_screen_start (int *r, int *c)
|
|
{
|
|
int or = Start_Row, oc = Start_Col;
|
|
|
|
if (c == NULL) Start_Col = 0;
|
|
else
|
|
{
|
|
Start_Col = *c;
|
|
*c = oc;
|
|
}
|
|
if (r == NULL) Start_Row = 0;
|
|
else
|
|
{
|
|
Start_Row = *r;
|
|
*r = or;
|
|
}
|
|
}
|
|
|
|
void SLsmg_draw_object (int r, int c, unsigned char object)
|
|
{
|
|
This_Row = r; This_Col = c;
|
|
|
|
if (point_visible (1))
|
|
{
|
|
int color = This_Color;
|
|
This_Color |= ALT_CHAR_FLAG;
|
|
SLsmg_write_char (object);
|
|
This_Color = color;
|
|
}
|
|
|
|
This_Col = c + 1;
|
|
}
|
|
|
|
void SLsmg_draw_hline (int n)
|
|
{
|
|
static unsigned char hbuf[16];
|
|
int count;
|
|
int cmin, cmax;
|
|
int final_col = This_Col + n;
|
|
int save_color;
|
|
|
|
if ((This_Row < Start_Row) || (This_Row >= Start_Row + Screen_Rows)
|
|
|| (0 == compute_clip (This_Col, n, Start_Col, Start_Col + Screen_Cols,
|
|
&cmin, &cmax)))
|
|
{
|
|
This_Col = final_col;
|
|
return;
|
|
}
|
|
|
|
if (hbuf[0] == 0)
|
|
{
|
|
SLMEMSET ((char *) hbuf, SLSMG_HLINE_CHAR, 16);
|
|
}
|
|
|
|
n = cmax - cmin;
|
|
count = n / 16;
|
|
|
|
save_color = This_Color;
|
|
This_Color |= ALT_CHAR_FLAG;
|
|
This_Col = cmin;
|
|
|
|
SLsmg_write_nchars ((char *) hbuf, n % 16);
|
|
while (count-- > 0)
|
|
{
|
|
SLsmg_write_nchars ((char *) hbuf, 16);
|
|
}
|
|
|
|
This_Color = save_color;
|
|
This_Col = final_col;
|
|
}
|
|
|
|
void SLsmg_draw_vline (int n)
|
|
{
|
|
unsigned char ch = SLSMG_VLINE_CHAR;
|
|
int c = This_Col, rmin, rmax;
|
|
int final_row = This_Row + n;
|
|
int save_color;
|
|
|
|
if (((c < Start_Col) || (c >= Start_Col + Screen_Cols)) ||
|
|
(0 == compute_clip (This_Row, n, Start_Row, Start_Row + Screen_Rows,
|
|
&rmin, &rmax)))
|
|
{
|
|
This_Row = final_row;
|
|
return;
|
|
}
|
|
|
|
save_color = This_Color;
|
|
This_Color |= ALT_CHAR_FLAG;
|
|
|
|
for (This_Row = rmin; This_Row < rmax; This_Row++)
|
|
{
|
|
This_Col = c;
|
|
SLsmg_write_nchars ((char *) &ch, 1);
|
|
}
|
|
|
|
This_Col = c; This_Row = final_row;
|
|
This_Color = save_color;
|
|
}
|
|
|
|
void SLsmg_draw_box (int r, int c, int dr, int dc)
|
|
{
|
|
if (!dr || !dc) return;
|
|
This_Row = r; This_Col = c;
|
|
dr--; dc--;
|
|
SLsmg_draw_hline (dc);
|
|
SLsmg_draw_vline (dr);
|
|
This_Row = r; This_Col = c;
|
|
SLsmg_draw_vline (dr);
|
|
SLsmg_draw_hline (dc);
|
|
SLsmg_draw_object (r, c, SLSMG_ULCORN_CHAR);
|
|
SLsmg_draw_object (r, c + dc, SLSMG_URCORN_CHAR);
|
|
SLsmg_draw_object (r + dr, c, SLSMG_LLCORN_CHAR);
|
|
SLsmg_draw_object (r + dr, c + dc, SLSMG_LRCORN_CHAR);
|
|
This_Row = r; This_Col = c;
|
|
}
|
|
|
|
void SLsmg_fill_region (int r, int c, int dr, int dc, unsigned char ch)
|
|
{
|
|
static unsigned char hbuf[16];
|
|
int count;
|
|
int dcmax, rmax;
|
|
|
|
|
|
if ((dc < 0) || (dr < 0)) return;
|
|
|
|
SLsmg_gotorc (r, c);
|
|
r = This_Row; c = This_Col;
|
|
|
|
dcmax = Screen_Cols - This_Col;
|
|
if (dc > dcmax) dc = dcmax;
|
|
|
|
rmax = This_Row + dr;
|
|
if (rmax > Screen_Rows) rmax = Screen_Rows;
|
|
|
|
#if 0
|
|
ch = Alt_Char_Set[ch];
|
|
#endif
|
|
if (ch != hbuf[0]) SLMEMSET ((char *) hbuf, (char) ch, 16);
|
|
|
|
for (This_Row = r; This_Row < rmax; This_Row++)
|
|
{
|
|
This_Col = c;
|
|
count = dc / 16;
|
|
SLsmg_write_nchars ((char *) hbuf, dc % 16);
|
|
while (count-- > 0)
|
|
{
|
|
SLsmg_write_nchars ((char *) hbuf, 16);
|
|
}
|
|
}
|
|
|
|
This_Row = r;
|
|
}
|
|
|
|
void SLsmg_forward (int n)
|
|
{
|
|
This_Col += n;
|
|
}
|
|
|
|
void SLsmg_write_color_chars (unsigned short *s, unsigned int len)
|
|
{
|
|
unsigned short *smax, sh;
|
|
char buf[32], *b, *bmax;
|
|
int color, save_color;
|
|
|
|
smax = s + len;
|
|
b = buf;
|
|
bmax = b + sizeof (buf);
|
|
|
|
save_color = This_Color;
|
|
|
|
while (s < smax)
|
|
{
|
|
sh = *s++;
|
|
|
|
color = sh >> 8;
|
|
if ((color != This_Color) || (b == bmax))
|
|
{
|
|
if (b != buf)
|
|
{
|
|
SLsmg_write_nchars (buf, (int) (b - buf));
|
|
b = buf;
|
|
}
|
|
This_Color = color;
|
|
}
|
|
*b++ = (char) (sh & 0xFF);
|
|
}
|
|
|
|
if (b != buf)
|
|
SLsmg_write_nchars (buf, (int) (b - buf));
|
|
|
|
This_Color = save_color;
|
|
}
|
|
|
|
unsigned int SLsmg_read_raw (unsigned short *buf, unsigned int len)
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{
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unsigned int r, c;
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|
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if (0 == point_visible (1)) return 0;
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|
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r = (unsigned int) (This_Row - Start_Row);
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c = (unsigned int) (This_Col - Start_Col);
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|
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if (c + len > (unsigned int) Screen_Cols)
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len = (unsigned int) Screen_Cols - c;
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|
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memcpy ((char *) buf, (char *) (SL_Screen[r].neew + c), len * sizeof (short));
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return len;
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}
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unsigned int SLsmg_write_raw (unsigned short *buf, unsigned int len)
|
|
{
|
|
unsigned int r, c;
|
|
unsigned short *dest;
|
|
|
|
if (0 == point_visible (1)) return 0;
|
|
|
|
r = (unsigned int) (This_Row - Start_Row);
|
|
c = (unsigned int) (This_Col - Start_Col);
|
|
|
|
if (c + len > (unsigned int) Screen_Cols)
|
|
len = (unsigned int) Screen_Cols - c;
|
|
|
|
dest = SL_Screen[r].neew + c;
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|
|
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if (0 != memcmp ((char *) dest, (char *) buf, len * sizeof (short)))
|
|
{
|
|
memcpy ((char *) dest, (char *) buf, len * sizeof (short));
|
|
SL_Screen[r].flags |= TOUCHED;
|
|
}
|
|
return len;
|
|
}
|