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quakeforge/libs/video/renderer/r_screen.c

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/*
screen.c
master for refresh, status bar, console, chat, notify, etc
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static __attribute__ ((unused)) const char rcsid[] =
"$Id$";
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <time.h>
#include "QF/cmd.h"
#include "QF/console.h"
#include "QF/cvar.h"
#include "QF/draw.h"
#include "QF/pcx.h"
#include "QF/render.h"
#include "QF/screen.h"
#include "QF/sys.h"
#include "QF/texture.h"
#include "compat.h"
#include "r_cvar.h"
#include "r_local.h"
#include "r_screen.h"
#include "sbar.h"
/*
background clear
rendering
turtle/net/ram icons
sbar
centerprint / slow centerprint
notify lines
intermission / finale overlay
loading plaque
console
menu
required background clears
required update regions
syncronous draw mode or async
One off screen buffer, with updates either copied or xblited
Need to double buffer?
async draw will require the refresh area to be cleared, because it will be
xblited, but sync draw can just ignore it.
sync
draw
CenterPrint ()
SlowPrint ()
Screen_Update ();
Con_Printf ();
net
turn off messages option
the refresh is always rendered, unless the console is full screen
console is:
notify lines
half
full
*/
// only the refresh window will be updated unless these variables are flagged
int scr_copytop;
int scr_copyeverything;
float scr_con_current;
float scr_conlines; // lines of console to display
float oldfov;
int oldsbar;
qboolean scr_initialized; // ready to draw
qpic_t *scr_ram;
qpic_t *scr_net;
qpic_t *scr_turtle;
int scr_fullupdate;
int clearconsole;
int clearnotify;
viddef_t vid; // global video state
vrect_t *pconupdate;
vrect_t scr_vrect;
qboolean scr_skipupdate;
qboolean block_drawing;
/* CENTER PRINTING */
char scr_centerstring[1024];
float scr_centertime_start; // for slow victory printing
float scr_centertime_off;
int scr_center_lines;
int scr_erase_lines;
int scr_erase_center;
/*
SCR_CenterPrint
Called for important messages that should stay in the center of the screen
for a few moments
*/
void
SCR_CenterPrint (const char *str)
{
strncpy (scr_centerstring, str, sizeof (scr_centerstring) - 1);
scr_centertime_off = scr_centertime->value;
scr_centertime_start = r_realtime;
// count the number of lines for centering
scr_center_lines = 1;
while (*str) {
if (*str == '\n')
scr_center_lines++;
str++;
}
}
static void
SCR_DrawCenterString (void)
{
char *start;
int remaining, j, l, x, y;
// the finale prints the characters one at a time
if (r_force_fullscreen /* FIXME: better test */)
remaining = scr_printspeed->value * (r_realtime -
scr_centertime_start);
else
remaining = 9999;
scr_erase_center = 0;
start = scr_centerstring;
if (scr_center_lines <= 4)
y = vid.height * 0.35;
else
y = 48;
do {
// scan the width of the line
for (l = 0; l < 40; l++)
if (start[l] == '\n' || !start[l])
break;
x = (vid.width - l * 8) / 2;
for (j = 0; j < l; j++, x += 8) {
Draw_Character (x, y, start[j]);
if (!remaining--)
return;
}
y += 8;
while (*start && *start != '\n')
start++;
if (!*start)
break;
start++; // skip the \n
} while (1);
}
void
SCR_CheckDrawCenterString (void)
{
scr_copytop = 1;
if (scr_center_lines > scr_erase_lines)
scr_erase_lines = scr_center_lines;
scr_centertime_off -= r_frametime;
if (scr_centertime_off <= 0 && !r_force_fullscreen /*FIXME: better test*/)
return;
if (key_dest != key_game)
return;
SCR_DrawCenterString ();
}
float
CalcFov (float fov_x, float width, float height)
{
float a, x;
if (fov_x < 1 || fov_x > 179)
Sys_Error ("Bad fov: %f", fov_x);
x = width / tan (fov_x * (M_PI / 360));
a = (x == 0) ? 90 : atan (height / x); // 0 shouldn't happen
a = a * (360 / M_PI);
return a;
}
/*
SCR_SizeUp_f
Keybinding command
*/
static void
SCR_SizeUp_f (void)
{
if (scr_viewsize->int_val < 120) {
Cvar_SetValue (scr_viewsize, scr_viewsize->int_val + 10);
vid.recalc_refdef = 1;
}
}
/*
SCR_SizeDown_f
Keybinding command
*/
static void
SCR_SizeDown_f (void)
{
Cvar_SetValue (scr_viewsize, scr_viewsize->int_val - 10);
vid.recalc_refdef = 1;
}
void
SCR_DrawRam (void)
{
if (!scr_showram->int_val)
return;
if (!r_cache_thrash)
return;
Draw_Pic (scr_vrect.x + 32, scr_vrect.y, scr_ram);
}
void
SCR_DrawTurtle (void)
{
static int count;
if (!scr_showturtle->int_val)
return;
if (r_frametime < 0.1) {
count = 0;
return;
}
count++;
if (count < 3)
return;
Draw_Pic (scr_vrect.x, scr_vrect.y, scr_turtle);
}
extern int fps_count; //FIXME
void
SCR_DrawFPS (void)
{
char st[80];
double t;
static double lastframetime;
int i, x, y;
static int lastfps;
if (!show_fps->int_val)
return;
t = Sys_DoubleTime ();
if ((t - lastframetime) >= 1.0) {
lastfps = fps_count;
fps_count = 0;
lastframetime = t;
}
snprintf (st, sizeof (st), "%3d FPS", lastfps);
// FIXME! This is evil. -- Deek
// calculate the location of the clock
if (show_time->int_val <= 0) {
i = 8;
} else if (show_time->int_val == 1) {
i = 56;
} else {
i = 80;
}
x = hudswap ? vid.width - ((strlen (st) * 8) + i) : i;
y = vid.height - sb_lines - 8;
Draw_String (x, y, st);
}
/*
SCR_DrawTime
Draw a clock on the screen
Written by Misty, rewritten by Deek.
*/
void
SCR_DrawTime (void)
{
char st[80];
const char *timefmt = NULL;
int x, y;
struct tm *local = NULL;
time_t utc = 0;
// any cvar that can take multiple settings must be able to handle abuse.
if (show_time->int_val <= 0)
return;
// Get local time
utc = time (NULL);
local = localtime (&utc);
if (show_time->int_val == 1) { // Use international format
timefmt = "%k:%M";
} else if (show_time->int_val >= 2) { // US AM/PM display
timefmt = "%l:%M %P";
}
strftime (st, sizeof (st), timefmt, local);
// Print it at far left/right of screen
x = hudswap ? (vid.width - ((strlen (st) * 8) + 8)) : 8;
y = vid.height - sb_lines - 8;
Draw_String (x, y, st);
}
void
SCR_DrawPause (void)
{
qpic_t *pic;
if (!scr_showpause->int_val) // turn off for screenshots
return;
if (!r_paused)
return;
pic = Draw_CachePic ("gfx/pause.lmp", true);
Draw_Pic ((vid.width - pic->width) / 2,
(vid.height - 48 - pic->height) / 2, pic);
}
void
SCR_SetUpToDrawConsole (void)
{
Con_CheckResize ();
// decide on the height of the console
if (!r_active) {
scr_conlines = vid.height; // full screen
scr_con_current = scr_conlines;
} else if (key_dest == key_console)
scr_conlines = vid.height * bound (0.2, scr_consize->value, 1);
else
scr_conlines = 0; // none visible
if (scr_con_current >= vid.height - r_lineadj)
scr_copyeverything = 1;
if (scr_conlines < scr_con_current) {
scr_con_current -= scr_conspeed->value * r_frametime;
if (scr_conlines > scr_con_current)
scr_con_current = scr_conlines;
} else if (scr_conlines > scr_con_current) {
scr_con_current += scr_conspeed->value * r_frametime;
if (scr_conlines < scr_con_current)
scr_con_current = scr_conlines;
}
if (scr_con_current >= vid.height - r_lineadj)
scr_copyeverything = 1;
if (clearconsole++ < vid.numpages)
Sbar_Changed ();
}
void
SCR_DrawConsole (void)
{
Con_DrawConsole (scr_con_current);
}
/*
Find closest color in the palette for named color
*/
int
MipColor (int r, int g, int b)
{
float bestdist, dist;
int r1, g1, b1, i;
int best = 0;
static int lastbest;
static int lr = -1, lg = -1, lb = -1;
if (r == lr && g == lg && b == lb)
return lastbest;
bestdist = 256 * 256 * 3;
for (i = 0; i < 256; i++) {
int j;
j = i * 3;
r1 = vid.palette[j] - r;
g1 = vid.palette[j + 1] - g;
b1 = vid.palette[j + 2] - b;
dist = r1 * r1 + g1 * g1 + b1 * b1;
if (dist < bestdist) {
bestdist = dist;
best = i;
}
}
lr = r;
lg = g;
lb = b;
lastbest = best;
return best;
}
// in draw.c
static void
SCR_DrawCharToSnap (int num, byte * dest, int width)
{
byte *source;
int col, row, drawline, x;
row = num >> 4;
col = num & 15;
source = draw_chars + (row << 10) + (col << 3);
drawline = 8;
while (drawline--) {
for (x = 0; x < 8; x++)
if (source[x])
dest[x] = source[x];
else
dest[x] = 98;
source += 128;
dest -= width;
}
}
void
SCR_DrawStringToSnap (const char *s, tex_t *tex, int x, int y)
{
byte *dest;
byte *buf = tex->data;
const unsigned char *p;
int width = tex->width;
dest = buf + ((y * width) + x);
p = (const unsigned char *) s;
while (*p) {
SCR_DrawCharToSnap (*p++, dest, width);
dest += 8;
}
}
void
SCR_Init (void)
{
// register our commands
Cmd_AddCommand ("screenshot", SCR_ScreenShot_f, "Take a screenshot, "
"saves as qfxxx.pcx in the current directory");
Cmd_AddCommand ("sizeup", SCR_SizeUp_f, "Increases the screen size");
Cmd_AddCommand ("sizedown", SCR_SizeDown_f, "Decreases the screen size");
scr_ram = Draw_PicFromWad ("ram");
scr_net = Draw_PicFromWad ("net");
scr_turtle = Draw_PicFromWad ("turtle");
scr_initialized = true;
}
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