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quakeforge/libs/video/renderer/sw32/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
*/
static const char rcsid[] =
"$Id$";
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <time.h>
#include "QF/console.h"
#include "QF/cvar.h"
#include "QF/draw.h"
#include "QF/pcx.h"
#include "QF/quakefs.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_dynamic.h"
#include "r_local.h"
#include "r_screen.h"
#include "sbar.h"
#include "view.h"
/*
SCR_CalcRefdef
Must be called whenever vid changes
Internal use only
*/
static void
SCR_CalcRefdef (void)
{
vrect_t vrect;
float size;
int h;
qboolean full = false;
scr_fullupdate = 0; // force a background redraw
vid.recalc_refdef = 0;
// force the status bar to redraw
Sbar_Changed ();
// bound viewsize
Cvar_SetValue (scr_viewsize, bound (30, scr_viewsize->int_val, 120));
// bound field of view
Cvar_SetValue (scr_fov, bound (1, scr_fov->value, 170));
if (scr_viewsize->int_val >= 120)
sb_lines = 0; // no status bar at all
else if (scr_viewsize->int_val >= 110)
sb_lines = 24; // no inventory
else
sb_lines = 24 + 16 + 8;
if (scr_viewsize->int_val >= 100) {
full = true;
size = 100.0;
} else {
size = scr_viewsize->int_val;
}
// intermission is always full screen
if (r_force_fullscreen /* FIXME: better test */) {
full = true;
size = 100.0;
sb_lines = 0;
}
size /= 100.0;
h = vid.height - r_lineadj;
r_refdef.vrect.width = vid.width * size + 0.5;
if (r_refdef.vrect.width < 96) {
size = 96.0 / r_refdef.vrect.width;
r_refdef.vrect.width = 96; // min for icons
}
r_refdef.vrect.height = vid.height * size + 0.5;
if (r_refdef.vrect.height > h)
r_refdef.vrect.height = h;
r_refdef.vrect.x = (vid.width - r_refdef.vrect.width) / 2;
if (full)
r_refdef.vrect.y = 0;
else
r_refdef.vrect.y = (h - r_refdef.vrect.height) / 2;
r_refdef.fov_x = scr_fov->value;
r_refdef.fov_y =
CalcFov (r_refdef.fov_x, r_refdef.vrect.width, r_refdef.vrect.height);
scr_vrect = r_refdef.vrect;
// these calculations mirror those in R_Init() for r_refdef, but take no
// account of water warping
vrect.x = 0;
vrect.y = 0;
vrect.width = vid.width;
vrect.height = vid.height;
R_SetVrect (&vrect, &scr_vrect, r_lineadj);
// guard against going from one mode to another that's less than half the
// vertical resolution
if (scr_con_current > vid.height)
scr_con_current = vid.height;
// notify the refresh of the change
R_ViewChanged (&vrect, r_lineadj, vid.aspect);
}
void
SCR_ApplyBlend (void) // Used to be V_UpdatePalette
{
int r, g, b, i;
byte *basepal, *newpal;
byte pal[768];
switch(r_pixbytes) {
case 1:
{
basepal = vid.basepal;
newpal = pal;
for (i = 0; i < 256; i++) {
r = basepal[0];
g = basepal[1];
b = basepal[2];
basepal += 3;
r += (int) (v_blend[3] * (v_blend[0] * 256 - r));
g += (int) (v_blend[3] * (v_blend[1] * 256 - g));
b += (int) (v_blend[3] * (v_blend[2] * 256 -g));
newpal[0] = gammatable[r];
newpal[1] = gammatable[g];
newpal[2] = gammatable[b];
newpal += 3;
}
VID_ShiftPalette (pal);
}
break;
case 2:
{
int g1, g2, x, y;
unsigned short rramp[32], gramp[64], bramp[32], *temp;
for (i = 0; i < 32; i++) {
r = i << 3;
g1 = i << 3;
g2 = g1 + 4;
b = i << 3;
r += (int) (v_blend[3] * (v_blend[0] * 256 - r));
g1 += (int) (v_blend[3] * (v_blend[1] - g1));
g2 += (int) (v_blend[3] * (v_blend[1] - g2));
b += (int) (v_blend[3] * (v_blend[2] - b));
rramp[i] = (gammatable[r] << 8) & 0xF800;
gramp[i*2+0] = (gammatable[g1] << 3) & 0x07E0;
gramp[i*2+1] = (gammatable[g2] << 3) & 0x07E0;
bramp[i] = (gammatable[b] >> 3) & 0x001F;
}
temp = vid.buffer;
for (y = 0;y < vid.height;y++, temp += (vid.rowbytes >> 1))
for (x = 0;x < vid.width;x++)
temp[x] = rramp[(temp[x] & 0xF800) >> 11]
+ gramp[(temp[x] & 0x07E0) >> 5] + bramp[temp[x] & 0x001F];
}
break;
case 4:
{
int x, y;
byte ramp[256][4], *temp;
for (i = 0; i < 256; i++) {
r = i;
g = i;
b = i;
r += (int) (v_blend[3] * (v_blend[0] * 256 - r));
g += (int) (v_blend[3] * (v_blend[1] * 256 - g));
b += (int) (v_blend[3] * (v_blend[2] * 256 - b));
ramp[i][0] = gammatable[r];
ramp[i][1] = gammatable[g];
ramp[i][2] = gammatable[b];
ramp[i][3] = 0;
}
temp = vid.buffer;
for (y = 0;y < vid.height;y++, temp += vid.rowbytes)
{
for (x = 0;x < vid.width;x++)
{
temp[x*4+0] = ramp[temp[x*4+0]][0];
temp[x*4+1] = ramp[temp[x*4+1]][1];
temp[x*4+2] = ramp[temp[x*4+2]][2];
temp[x*4+3] = 0;
}
}
}
break;
default:
Sys_Error("V_UpdatePalette: unsupported r_pixbytes %i", r_pixbytes);
}
}
/* SCREEN SHOTS */
tex_t *
SCR_ScreenShot (int width, int height)
{
return 0;
}
void
SCR_ScreenShot_f (void)
{
char pcxname[MAX_OSPATH];
pcx_t *pcx;
int pcx_len;
// find a file name to save it to
if (!COM_NextFilename (pcxname, "qf", ".pcx")) {
Con_Printf ("SCR_ScreenShot_f: Couldn't create a PCX");
return;
}
// enable direct drawing of console to back buffer
D_EnableBackBufferAccess ();
// save the pcx file
switch(r_pixbytes) {
case 1:
pcx = EncodePCX (vid.buffer, vid.width, vid.height, vid.rowbytes,
vid.basepal, false, &pcx_len);
break;
case 2:
Con_Printf("SCR_ScreenShot_f: FIXME - add 16bit support\n");
break;
case 4:
Con_Printf("SCR_ScreenShot_f: FIXME - add 32bit support\n");
break;
default:
Sys_Error("SCR_ScreenShot_f: unsupported r_pixbytes %i", r_pixbytes);
}
// for adapters that can't stay mapped in for linear writes all the time
D_DisableBackBufferAccess ();
Con_Printf ("Wrote %s\n", pcxname);
}
/*
SCR_UpdateScreen
This is called every frame, and can also be called explicitly to flush
text to the screen.
WARNING: be very careful calling this from elsewhere, because the refresh
needs almost the entire 256k of stack space!
*/
void
SCR_UpdateScreen (double realtime, SCR_Func *scr_funcs)
{
static int oldviewsize;
vrect_t vrect;
if (scr_skipupdate || block_drawing)
return;
r_realtime = realtime;
scr_copytop = 0;
scr_copyeverything = 0;
if (!scr_initialized)
return; // not initialized yet
if (oldviewsize != scr_viewsize->int_val) {
oldviewsize = scr_viewsize->int_val;
vid.recalc_refdef = true;
}
if (oldfov != scr_fov->value) { // determine size of refresh window
oldfov = scr_fov->value;
vid.recalc_refdef = true;
}
if (oldscreensize != scr_viewsize->int_val) {
oldscreensize = scr_viewsize->int_val;
vid.recalc_refdef = true;
}
if (vid.recalc_refdef)
SCR_CalcRefdef ();
// do 3D refresh drawing, and then update the screen
D_EnableBackBufferAccess (); // of all overlay stuff if drawing
// directly
if (scr_fullupdate++ < vid.numpages) { // clear the entire screen
scr_copyeverything = 1;
Draw_TileClear (0, 0, vid.width, vid.height);
Sbar_Changed ();
}
pconupdate = NULL;
SCR_SetUpToDrawConsole ();
D_DisableBackBufferAccess (); // for adapters that can't stay mapped
// in for linear writes all the time
VID_LockBuffer ();
V_RenderView ();
VID_UnlockBuffer ();
D_EnableBackBufferAccess (); // of all overlay stuff if drawing
// directly
if (r_force_fullscreen /*FIXME*/ == 1 && key_dest == key_game) {
Sbar_IntermissionOverlay ();
} else if (r_force_fullscreen /*FIXME*/ == 2 && key_dest == key_game) {
Sbar_FinaleOverlay ();
SCR_CheckDrawCenterString ();
} else {
while (*scr_funcs) {
(*scr_funcs)();
scr_funcs++;
}
}
D_DisableBackBufferAccess (); // for adapters that can't stay mapped
// in for linear writes all the time
if (pconupdate) {
D_UpdateRects (pconupdate);
}
SCR_ApplyBlend ();
// update one of three areas
if (scr_copyeverything) {
vrect.x = 0;
vrect.y = 0;
vrect.width = vid.width;
vrect.height = vid.height;
vrect.pnext = 0;
VID_Update (&vrect);
} else if (scr_copytop) {
vrect.x = 0;
vrect.y = 0;
vrect.width = vid.width;
vrect.height = vid.height - sb_lines;
vrect.pnext = 0;
VID_Update (&vrect);
} else {
vrect.x = scr_vrect.x;
vrect.y = scr_vrect.y;
vrect.width = scr_vrect.width;
vrect.height = scr_vrect.height;
vrect.pnext = 0;
VID_Update (&vrect);
}
}
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