ref: 31a6f6c83db8e845bc5bf2f0927685a6c2bdfdb2
dir: /sys/src/games/doom/hu_lib.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// $Log:$
//
// DESCRIPTION: heads-up text and input code
//
//-----------------------------------------------------------------------------
static const char
rcsid[] = "$Id: hu_lib.c,v 1.3 1997/01/26 07:44:58 b1 Exp $";
#include <ctype.h>
#include "doomdef.h"
#include "v_video.h"
#include "m_swap.h"
#include "hu_lib.h"
#include "r_local.h"
#include "r_draw.h"
// boolean : whether the screen is always erased
#define noterased viewwindowx
extern boolean automapactive; // in AM_map.c
void HUlib_init(void)
{
}
void HUlib_clearTextLine(hu_textline_t* t)
{
t->len = 0;
t->l[0] = 0;
t->needsupdate = true;
}
void
HUlib_initTextLine
( hu_textline_t* t,
int x,
int y,
patch_t** f,
int sc )
{
t->x = x;
t->y = y;
t->f = f;
t->sc = sc;
HUlib_clearTextLine(t);
}
boolean
HUlib_addCharToTextLine
( hu_textline_t* t,
char ch )
{
if (t->len == HU_MAXLINELENGTH)
return false;
else
{
t->l[t->len++] = ch;
t->l[t->len] = 0;
t->needsupdate = 4;
return true;
}
}
boolean HUlib_delCharFromTextLine(hu_textline_t* t)
{
if (!t->len) return false;
else
{
t->l[--t->len] = 0;
t->needsupdate = 4;
return true;
}
}
void
HUlib_drawTextLine
( hu_textline_t* l,
boolean drawcursor )
{
int i;
int w;
int x;
unsigned char c;
// draw the new stuff
x = l->x;
for (i=0;i<l->len;i++)
{
c = toupper(l->l[i]);
if (c != ' '
&& c >= l->sc
&& c <= '_')
{
w = SHORT(l->f[c - l->sc]->width);
if (x+w > SCREENWIDTH)
break;
V_DrawPatchDirect(x, l->y, FG, l->f[c - l->sc]);
x += w;
}
else
{
x += 4;
if (x >= SCREENWIDTH)
break;
}
}
// draw the cursor if requested
if (drawcursor
&& x + SHORT(l->f['_' - l->sc]->width) <= SCREENWIDTH)
{
V_DrawPatchDirect(x, l->y, FG, l->f['_' - l->sc]);
}
}
// sorta called by HU_Erase and just better darn get things straight
void HUlib_eraseTextLine(hu_textline_t* l)
{
int lh;
int y;
int yoffset;
static boolean lastautomapactive = true;
// Only erases when NOT in automap and the screen is reduced,
// and the text must either need updating or refreshing
// (because of a recent change back from the automap)
if (!automapactive &&
viewwindowx && l->needsupdate)
{
lh = SHORT(l->f[0]->height) + 1;
for (y=l->y,yoffset=y*SCREENWIDTH ; y<l->y+lh ; y++,yoffset+=SCREENWIDTH)
{
if (y < viewwindowy || y >= viewwindowy + viewheight)
R_VideoErase(yoffset, SCREENWIDTH); // erase entire line
else
{
R_VideoErase(yoffset, viewwindowx); // erase left border
R_VideoErase(yoffset + viewwindowx + viewwidth, viewwindowx);
// erase right border
}
}
}
lastautomapactive = automapactive;
if (l->needsupdate) l->needsupdate--;
}
void
HUlib_initSText
( hu_stext_t* s,
int x,
int y,
int h,
patch_t** font,
int startchar,
boolean* on )
{
int i;
s->h = h;
s->on = on;
s->laston = true;
s->cl = 0;
for (i=0;i<h;i++)
HUlib_initTextLine(&s->l[i],
x, y - i*(SHORT(font[0]->height)+1),
font, startchar);
}
void HUlib_addLineToSText(hu_stext_t* s)
{
int i;
// add a clear line
if (++s->cl == s->h)
s->cl = 0;
HUlib_clearTextLine(&s->l[s->cl]);
// everything needs updating
for (i=0 ; i<s->h ; i++)
s->l[i].needsupdate = 4;
}
void
HUlib_addMessageToSText
( hu_stext_t* s,
char* prefix,
char* msg )
{
HUlib_addLineToSText(s);
if (prefix)
while (*prefix)
HUlib_addCharToTextLine(&s->l[s->cl], *(prefix++));
while (*msg)
HUlib_addCharToTextLine(&s->l[s->cl], *(msg++));
}
void HUlib_drawSText(hu_stext_t* s)
{
int i, idx;
hu_textline_t *l;
if (!*s->on)
return; // if not on, don't draw
// draw everything
for (i=0 ; i<s->h ; i++)
{
idx = s->cl - i;
if (idx < 0)
idx += s->h; // handle queue of lines
l = &s->l[idx];
// need a decision made here on whether to skip the draw
HUlib_drawTextLine(l, false); // no cursor, please
}
}
void HUlib_eraseSText(hu_stext_t* s)
{
int i;
for (i=0 ; i<s->h ; i++)
{
if (s->laston && !*s->on)
s->l[i].needsupdate = 4;
HUlib_eraseTextLine(&s->l[i]);
}
s->laston = *s->on;
}
void
HUlib_initIText
( hu_itext_t* it,
int x,
int y,
patch_t** font,
int startchar,
boolean* on )
{
it->lm = 0; // default left margin is start of text
it->on = on;
it->laston = true;
HUlib_initTextLine(&it->l, x, y, font, startchar);
}
// The following deletion routines adhere to the left margin restriction
void HUlib_delCharFromIText(hu_itext_t* it)
{
if (it->l.len != it->lm)
HUlib_delCharFromTextLine(&it->l);
}
void HUlib_eraseLineFromIText(hu_itext_t* it)
{
while (it->lm != it->l.len)
HUlib_delCharFromTextLine(&it->l);
}
// Resets left margin as well
void HUlib_resetIText(hu_itext_t* it)
{
it->lm = 0;
HUlib_clearTextLine(&it->l);
}
void
HUlib_addPrefixToIText
( hu_itext_t* it,
char* str )
{
while (*str)
HUlib_addCharToTextLine(&it->l, *(str++));
it->lm = it->l.len;
}
// wrapper function for handling general keyed input.
// returns true if it ate the key
boolean
HUlib_keyInIText
( hu_itext_t* it,
unsigned char ch )
{
if (ch >= ' ' && ch <= '_')
HUlib_addCharToTextLine(&it->l, (char) ch);
else
if (ch == KEY_BACKSPACE)
HUlib_delCharFromIText(it);
else
if (ch != KEY_ENTER)
return false; // did not eat key
return true; // ate the key
}
void HUlib_drawIText(hu_itext_t* it)
{
hu_textline_t *l = &it->l;
if (!*it->on)
return;
HUlib_drawTextLine(l, true); // draw the line w/ cursor
}
void HUlib_eraseIText(hu_itext_t* it)
{
if (it->laston && !*it->on)
it->l.needsupdate = 4;
HUlib_eraseTextLine(&it->l);
it->laston = *it->on;
}