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i_video.c
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i_video.c
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// 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:
// DOOM graphics stuff for SDL library
//
//-----------------------------------------------------------------------------
static const char
rcsid[] = "$Id: i_x.c,v 1.6 1997/02/03 22:45:10 b1 Exp $";
#include <stdlib.h>
#include "SDL.h"
#include "m_swap.h"
#include "doomstat.h"
#include "i_system.h"
#include "v_video.h"
#include "m_argv.h"
#include "d_main.h"
#include "doomdef.h"
SDL_Surface *screen;
// Fake mouse handling.
boolean grabMouse;
extern SDL_Joystick *joystick; // cosmito : shared between i_video.c and i_system.c for joystick staffing
// Blocky mode,
// replace each 320x200 pixel with multiply*multiply pixels.
// According to Dave Taylor, it still is a bonehead thing
// to use ....
static int multiply=1;
static int joy_x=0, joy_y=0;
static int last_key = 0; // cosmito
static Uint8 prev_jhat_value = 0;
#define JOYVAL 5000
extern int joyxside_byjoy;
extern int joyxside_bykey;
extern int swap_analogsticks;
//
// Translates the key
//
int xlatekey(SDL_keysym *key)
{
int rc;
switch(key->sym)
{
case SDLK_LEFT: rc = KEY_LEFTARROW; break;
case SDLK_RIGHT: rc = KEY_RIGHTARROW; break;
case SDLK_DOWN: rc = KEY_DOWNARROW; break;
case SDLK_UP: rc = KEY_UPARROW; break;
case SDLK_ESCAPE: rc = KEY_ESCAPE; break;
case SDLK_RETURN: rc = KEY_ENTER; break;
case SDLK_TAB: rc = KEY_TAB; break;
case SDLK_F1: rc = KEY_F1; break;
case SDLK_F2: rc = KEY_F2; break;
case SDLK_F3: rc = KEY_F3; break;
case SDLK_F4: rc = KEY_F4; break;
case SDLK_F5: rc = KEY_F5; break;
case SDLK_F6: rc = KEY_F6; break;
case SDLK_F7: rc = KEY_F7; break;
case SDLK_F8: rc = KEY_F8; break;
case SDLK_F9: rc = KEY_F9; break;
case SDLK_F10: rc = KEY_F10; break;
case SDLK_F11: rc = KEY_F11; break;
case SDLK_F12: rc = KEY_F12; break;
case SDLK_BACKSPACE:
case SDLK_DELETE: rc = KEY_BACKSPACE; break;
case SDLK_PAUSE: rc = KEY_PAUSE; break;
case SDLK_EQUALS: rc = KEY_EQUALS; break;
case SDLK_KP_MINUS:
case SDLK_MINUS: rc = KEY_MINUS; break;
case SDLK_LSHIFT:
case SDLK_RSHIFT:
rc = KEY_RSHIFT;
break;
case SDLK_LCTRL:
case SDLK_RCTRL:
rc = KEY_RCTRL;
break;
case SDLK_LALT:
case SDLK_LMETA:
case SDLK_RALT:
case SDLK_RMETA:
rc = KEY_RALT;
break;
default:
rc = key->sym;
break;
}
return rc;
}
void I_ShutdownGraphics(void)
{
SDL_Quit();
}
//
// I_StartFrame
//
void I_StartFrame (void)
{
// er?
}
/* This processes SDL events */
void I_GetEvent(SDL_Event *Event)
{
Uint8 buttonstate;
event_t event;
extern int config_buttons_int[];
int axis0 = 0;
int axis1 = 1;
int axis2 = 2;
if(swap_analogsticks == 1)
{
axis0 = 2;
axis1 = 3;
axis2 = 0;
}
DOMULTITASK;
//printf("Event->type: %i\n", Event->type);
switch (Event->type)
{
/* PS2 joystick support */
case SDL_JOYBUTTONDOWN:
{
//printf("button: %i\n", Event->jbutton.button);
/*
switch(Event->jbutton.button)
{
case 0: // 'Square' PS2 button
event.data1 = SDLK_o;
break;
case 1: // 'Cross' PS2 button
event.data1 = KEY_RSHIFT;
break;
case 2: // 'Circle' PS2 button
event.data1 = SDLK_p;
break;
case 3: // '^' PS2 button
event.data1 = KEY_ESCAPE;
break;
case 4: // 'Select' PS2 button
event.data1 = KEY_TAB; // activates the map
break;
case 5: // 'Start' PS2 button
event.data1 = KEY_ENTER;
break;
case 6: // 'L1' PS2 button
event.data1 = SDLK_n;
break;
case 7: // 'R1' PS2 button
event.data1 = KEY_RCTRL;
break;
case 8: // 'L2' PS2 button
event.data1 = SDLK_y;
break;
case 9: // 'R2' PS2 button
event.data1 = SDLK_SPACE;
break;
//case 10: /// Using dlanor suggestion : It's easy to knock off this button during gameplay. // 'Analog Left click' PS2 button
// event.data1 = KEY_TAB;
break;
case 11: // 'Analog Right click' PS2 button
event.data1 = KEY_F11;
break;
}
*/
if ( config_buttons_int[Event->jbutton.button] != -1)
{
event.data1 = config_buttons_int[Event->jbutton.button];
if (event.data1 > 255)
{
//joyxside_bykey = (event.data1 & 256) - 1; // strafe by key
//if (joyxside_bykey == 255)
// joyxside_bykey = -1;
// do this better later
joyxside_bykey = event.data1; // strafe by key
if (joyxside_bykey == STRAFELEFT)
joyxside_bykey = -1;
else
if (joyxside_bykey == STRAFERIGHT)
joyxside_bykey = 1;
//printf("event.data1 = %d\n", event.data1);
//printf("joyxside_bykey = %d\n", joyxside_bykey);
event.type = ev_joystick;
}
else
event.type = ev_keydown; // other actions
D_PostEvent(&event);
}
}
break;
case SDL_JOYBUTTONUP:
{
//switch(Event->jbutton.button)
//{
// case 0:
// event.data1 = SDLK_o;
// break;
// case 1:
// event.data1 = KEY_RSHIFT;
// break;
// case 2:
// event.data1 = SDLK_p;
// break;
// case 3:
// event.data1 = KEY_ESCAPE;
// break;
// case 4: // 'Select' PS2 button
// event.data1 = KEY_TAB;
// break;
// case 5: // 'Start' PS2 button
// event.data1 = KEY_ENTER;
// break;
// case 6:
// event.data1 = SDLK_n;
// break;
// case 7:
// event.data1 = KEY_RCTRL;
// break;
// case 8:
// event.data1 = SDLK_y;
// break;
// case 9:
// event.data1 = SDLK_SPACE;
// break;
// //case 10: // 'Analog Left click' PS2 button
// // event.data1 = KEY_TAB;
// break;
// case 11: // 'Analog Right click' PS2 button
// event.data1 = KEY_F11;
// break;
//}
//if ( config_buttons_int[Event->jbutton.button] != -1)
//{
// if (Event->jbutton.button == 6) // example : strafe with l1
// {
// joyxside_bykey = 0;
// event.type = ev_joystick;
// //printf("SDL_JOYBUTTONUP D_PostEvent *ev_joystick\n");
// }
// else
// {
// // general procedure code
// event.data1 = config_buttons_int[Event->jbutton.button];
// event.type = ev_keyup;
// //printf("SDL_JOYBUTTONUP D_PostEvent *ev_keyup\n");
// }
// D_PostEvent(&event);
//}
//if ( config_buttons_int[Event->jbutton.button] != -1)
//{
// if (Event->jbutton.button == 6) // example : strafe with l1
// {
// joyxside_bykey = 0;
// event.type = ev_joystick;
// //printf("SDL_JOYBUTTONUP D_PostEvent *ev_joystick\n");
// }
// else
// {
// // general procedure code
// event.data1 = config_buttons_int[Event->jbutton.button];
// event.type = ev_keyup;
// //printf("SDL_JOYBUTTONUP D_PostEvent *ev_keyup\n");
// }
// D_PostEvent(&event);
//}
if ( config_buttons_int[Event->jbutton.button] != -1)
{
event.data1 = config_buttons_int[Event->jbutton.button];
if (event.data1 > 255)
{
joyxside_bykey = 0; // strafe by key
event.type = ev_joystick;
}
else
event.type = ev_keyup; // other actions
D_PostEvent(&event);
}
} break;
case SDL_JOYAXISMOTION:
{
if( Event->jaxis.axis == axis0)
{
joy_x = 0;
if( (Event->jaxis.value > JOYVAL) )
{
joy_x = 1;
//printf("right\n");
}
else
if( ( Event->jaxis.value < -JOYVAL) )
{
joy_x = -1;
//printf("left\n");
}
}
if( Event->jaxis.axis == axis1)
{
joy_y = 0;
if( (Event->jaxis.value > JOYVAL) )
joy_y = 1;
else
if( ( Event->jaxis.value < -JOYVAL) )
joy_y = -1;
}
if( Event->jaxis.axis == axis2)
{
Sint16 val = Event->jaxis.value / 3000; // cosmito : well, 3000 should be replaced by JOYVAL for consistency... TBD : Test later
if (abs(val) < 3)
{
if (last_key == 0) // last_key also acts like a flag : when == 0, means previously was instructed a strafe action, if != -0, holds the key code
{
joyxside_byjoy = 0; // strafe information : if == 0 no strafe
}
else
{
event_t eventkey;
eventkey.data1 = last_key;
eventkey.type = ev_keyup; // other actions
last_key = 0;
D_PostEvent(&eventkey);
}
}
else if ( val > 0 )
{
int v = config_buttons_int[19];
if (v != -1)
{
if (v > 255) // trick : see i_main.c config_actions[]
{
joyxside_byjoy = 1; // strafe information : if > 0 strafe right
}
else
{
event_t eventkey;
eventkey.data1 = v;
last_key = v;
eventkey.type = ev_keydown; // other actions
D_PostEvent(&eventkey);
}
}
}
else
{
int v = config_buttons_int[18];
if (v != -1)
{
if (v > 255) // trick : see i_main.c config_actions[]
{
joyxside_byjoy = -1; // strafe information : if < 0 strafe left
}
else
{
event_t eventkey;
eventkey.data1 = v;
last_key = v;
eventkey.type = ev_keydown; // other actions
D_PostEvent(&eventkey);
}
}
}
}
//event.data1 = joyxside_byjoy; // actually, event.data1 is not relevant anymore. info for strafe is directly read at joyxside_byjoy and joyxside_bykey
event.data2 = joy_x;
event.data3 = joy_y;
event.type = ev_joystick;
D_PostEvent(&event);
} break;
// cosmito : for handling dpad
case SDL_JOYHATMOTION:
{
//printf("Event->jhat.value = %d\n", Event->jhat.value);
//printf("prev.value = %d\n\n", prev_jhat_value);
//printf("logic = %d\n\n", ((Event->jhat.value & SDL_HAT_LEFT) == SDL_HAT_LEFT) );
if ( (((prev_jhat_value & SDL_HAT_LEFT) ^ (Event->jhat.value & SDL_HAT_LEFT)) == SDL_HAT_LEFT) && ((Event->jhat.value & SDL_HAT_LEFT) == SDL_HAT_LEFT) )
{
if(config_buttons_int[12] != -1)
{
event.data1 = config_buttons_int[12];
if (event.data1 > 255)
{
joyxside_bykey = event.data1; // strafe by key
if (joyxside_bykey == STRAFELEFT)
joyxside_bykey = -1;
else
if (joyxside_bykey == STRAFERIGHT)
joyxside_bykey = 1;
event.type = ev_joystick;
}
else
event.type = ev_keydown; // other actions
D_PostEvent(&event);
}
}
else if ( (((prev_jhat_value & SDL_HAT_LEFT) ^ (Event->jhat.value & SDL_HAT_LEFT)) == SDL_HAT_LEFT) && ((Event->jhat.value & SDL_HAT_LEFT) == 0) )
{
if(config_buttons_int[12] != -1)
{
event.data1 = config_buttons_int[12];
if (event.data1 > 255)
{
joyxside_bykey = 0;
event.type = ev_joystick;
}
else
event.type = ev_keyup;
D_PostEvent(&event);
}
}
if ( (((prev_jhat_value & SDL_HAT_RIGHT) ^ (Event->jhat.value & SDL_HAT_RIGHT)) == SDL_HAT_RIGHT) && ((Event->jhat.value & SDL_HAT_RIGHT) == SDL_HAT_RIGHT) )
{
if(config_buttons_int[13] != -1)
{
event.data1 = config_buttons_int[13];
if (event.data1 > 255)
{
joyxside_bykey = event.data1; // strafe by key
if (joyxside_bykey == STRAFELEFT)
joyxside_bykey = -1;
else
if (joyxside_bykey == STRAFERIGHT)
joyxside_bykey = 1;
event.type = ev_joystick;
}
else
event.type = ev_keydown; // other actions
D_PostEvent(&event);
}
}
else if ( (((prev_jhat_value & SDL_HAT_RIGHT) ^ (Event->jhat.value & SDL_HAT_RIGHT)) == SDL_HAT_RIGHT) && ((Event->jhat.value & SDL_HAT_RIGHT) == 0) )
{
if(config_buttons_int[13] != -1)
{
event.data1 = config_buttons_int[13];
if (event.data1 > 255)
{
joyxside_bykey = 0;
event.type = ev_joystick;
}
else
event.type = ev_keyup;
D_PostEvent(&event);
}
}
if ( (((prev_jhat_value & SDL_HAT_UP) ^ (Event->jhat.value & SDL_HAT_UP)) == SDL_HAT_UP) && ((Event->jhat.value & SDL_HAT_UP) == SDL_HAT_UP) )
{
// TBD : modifier
/*if(config_buttons_int[14] != -1)
{
event.data1 = config_buttons_int[14];
event.type = ev_keydown;
D_PostEvent(&event);
}*/
if(config_buttons_int[14] != -1)
{
event.data1 = config_buttons_int[14];
if (event.data1 > 255)
{
joyxside_bykey = event.data1; // strafe by key
if (joyxside_bykey == STRAFELEFT)
joyxside_bykey = -1;
else
if (joyxside_bykey == STRAFERIGHT)
joyxside_bykey = 1;
event.type = ev_joystick;
}
else
event.type = ev_keydown; // other actions
D_PostEvent(&event);
}
}
else if ( (((prev_jhat_value & SDL_HAT_UP) ^ (Event->jhat.value & SDL_HAT_UP)) == SDL_HAT_UP) && ((Event->jhat.value & SDL_HAT_UP) == 0) )
{
if(config_buttons_int[14] != -1)
{
event.data1 = config_buttons_int[14];
if (event.data1 > 255)
{
joyxside_bykey = 0;
event.type = ev_joystick;
}
else
event.type = ev_keyup;
D_PostEvent(&event);
}
}
if ( (((prev_jhat_value & SDL_HAT_DOWN) ^ (Event->jhat.value & SDL_HAT_DOWN)) == SDL_HAT_DOWN) && ((Event->jhat.value & SDL_HAT_DOWN) == SDL_HAT_DOWN) )
{
/*if(config_buttons_int[15] != -1)
{
event.data1 = config_buttons_int[15];
event.type = ev_keydown;
D_PostEvent(&event);
}*/
if(config_buttons_int[15] != -1)
{
event.data1 = config_buttons_int[15];
if (event.data1 > 255)
{
joyxside_bykey = event.data1; // strafe by key
if (joyxside_bykey == STRAFELEFT)
joyxside_bykey = -1;
else
if (joyxside_bykey == STRAFERIGHT)
joyxside_bykey = 1;
event.type = ev_joystick;
}
else
event.type = ev_keydown; // other actions
D_PostEvent(&event);
}
}
else if ( (((prev_jhat_value & SDL_HAT_DOWN) ^ (Event->jhat.value & SDL_HAT_DOWN)) == SDL_HAT_DOWN) && ((Event->jhat.value & SDL_HAT_DOWN) == 0) )
{
if(config_buttons_int[15] != -1)
{
event.data1 = config_buttons_int[15];
if (event.data1 > 255)
{
joyxside_bykey = 0;
event.type = ev_joystick;
}
else
event.type = ev_keyup;
D_PostEvent(&event);
}
}
}
prev_jhat_value = Event->jhat.value;
break;
case SDL_KEYDOWN:
event.type = ev_keydown;
event.data1 = xlatekey(&Event->key.keysym);
D_PostEvent(&event);
break;
case SDL_KEYUP:
event.type = ev_keyup;
event.data1 = xlatekey(&Event->key.keysym);
D_PostEvent(&event);
break;
case SDL_MOUSEBUTTONDOWN:
case SDL_MOUSEBUTTONUP:
buttonstate = SDL_GetMouseState(NULL, NULL);
event.type = ev_mouse;
event.data1 = 0
| (buttonstate & SDL_BUTTON(1) ? 1 : 0)
| (buttonstate & SDL_BUTTON(2) ? 2 : 0)
| (buttonstate & SDL_BUTTON(3) ? 4 : 0);
event.data2 = event.data3 = 0;
D_PostEvent(&event);
break;
#if (SDL_MAJOR_VERSION >= 0) && (SDL_MINOR_VERSION >= 9)
case SDL_MOUSEMOTION:
/* Ignore mouse warp events */
if ((Event->motion.x != screen->w/2)||(Event->motion.y != screen->h/2))
{
/* Warp the mouse back to the center */
if (grabMouse) {
SDL_WarpMouse(screen->w/2, screen->h/2);
}
event.type = ev_mouse;
event.data1 = 0
| (Event->motion.state & SDL_BUTTON(1) ? 1 : 0)
| (Event->motion.state & SDL_BUTTON(2) ? 2 : 0)
| (Event->motion.state & SDL_BUTTON(3) ? 4 : 0);
event.data2 = Event->motion.xrel << 2;
event.data3 = -Event->motion.yrel << 2;
D_PostEvent(&event);
}
break;
#endif
case SDL_QUIT:
I_Quit();
}
}
//
// I_StartTic
//
void I_StartTic (void)
{
SDL_Event Event;
// printf("starttic\n");
while ( SDL_PollEvent(&Event) )
I_GetEvent(&Event);
}
//
// I_UpdateNoBlit
//
void I_UpdateNoBlit (void)
{
// what is this?
}
//
// I_FinishUpdate
//
void I_FinishUpdate (void)
{
static int lasttic;
int tics;
int i;
// draws little dots on the bottom of the screen
if (devparm)
{
i = I_GetTime();
tics = i - lasttic;
lasttic = i;
if (tics > 20) tics = 20;
for (i=0 ; i<tics*2 ; i+=2)
screens[0][ (SCREENHEIGHT-1)*SCREENWIDTH + i] = 0xff;
for ( ; i<20*2 ; i+=2)
screens[0][ (SCREENHEIGHT-1)*SCREENWIDTH + i] = 0x0;
}
// scales the screen size before blitting it
if ( SDL_MUSTLOCK(screen) ) {
if ( SDL_LockSurface(screen) < 0 ) {
return;
}
}
if ((multiply == 1) && SDL_MUSTLOCK(screen))
{
unsigned char *olineptr;
unsigned char *ilineptr;
int y;
ilineptr = (unsigned char *) screens[0];
olineptr = (unsigned char *) screen->pixels;
y = SCREENHEIGHT;
while (y--)
{
memcpy(olineptr, ilineptr, screen->w);
ilineptr += SCREENWIDTH;
olineptr += screen->pitch;
}
}
else if (multiply == 2)
{
unsigned int *olineptrs[2];
unsigned int *ilineptr;
int x, y, i;
unsigned int twoopixels;
unsigned int twomoreopixels;
unsigned int fouripixels;
ilineptr = (unsigned int *) (screens[0]);
for (i=0 ; i<2 ; i++) {
olineptrs[i] =
(unsigned int *)&((Uint8 *)screen->pixels)[i*screen->pitch];
}
y = SCREENHEIGHT;
while (y--)
{
x = SCREENWIDTH;
do
{
fouripixels = *ilineptr++;
twoopixels = (fouripixels & 0xff000000)
| ((fouripixels>>8) & 0xffff00)
| ((fouripixels>>16) & 0xff);
twomoreopixels = ((fouripixels<<16) & 0xff000000)
| ((fouripixels<<8) & 0xffff00)
| (fouripixels & 0xff);
#ifdef __BIG_ENDIAN__
*olineptrs[0]++ = twoopixels;
*olineptrs[1]++ = twoopixels;
*olineptrs[0]++ = twomoreopixels;
*olineptrs[1]++ = twomoreopixels;
#else
*olineptrs[0]++ = twomoreopixels;
*olineptrs[1]++ = twomoreopixels;
*olineptrs[0]++ = twoopixels;
*olineptrs[1]++ = twoopixels;
#endif
} while (x-=4);
olineptrs[0] += screen->pitch/4;
olineptrs[1] += screen->pitch/4;
}
}
else if (multiply == 3)
{
unsigned int *olineptrs[3];
unsigned int *ilineptr;
int x, y, i;
unsigned int fouropixels[3];
unsigned int fouripixels;
ilineptr = (unsigned int *) (screens[0]);
for (i=0 ; i<3 ; i++) {
olineptrs[i] =
(unsigned int *)&((Uint8 *)screen->pixels)[i*screen->pitch];
}
y = SCREENHEIGHT;
while (y--)
{
x = SCREENWIDTH;
do
{
fouripixels = *ilineptr++;
fouropixels[0] = (fouripixels & 0xff000000)
| ((fouripixels>>8) & 0xff0000)
| ((fouripixels>>16) & 0xffff);
fouropixels[1] = ((fouripixels<<8) & 0xff000000)
| (fouripixels & 0xffff00)
| ((fouripixels>>8) & 0xff);
fouropixels[2] = ((fouripixels<<16) & 0xffff0000)
| ((fouripixels<<8) & 0xff00)
| (fouripixels & 0xff);
#ifdef __BIG_ENDIAN__
*olineptrs[0]++ = fouropixels[0];
*olineptrs[1]++ = fouropixels[0];
*olineptrs[2]++ = fouropixels[0];
*olineptrs[0]++ = fouropixels[1];
*olineptrs[1]++ = fouropixels[1];
*olineptrs[2]++ = fouropixels[1];
*olineptrs[0]++ = fouropixels[2];
*olineptrs[1]++ = fouropixels[2];
*olineptrs[2]++ = fouropixels[2];
#else
*olineptrs[0]++ = fouropixels[2];
*olineptrs[1]++ = fouropixels[2];
*olineptrs[2]++ = fouropixels[2];
*olineptrs[0]++ = fouropixels[1];
*olineptrs[1]++ = fouropixels[1];
*olineptrs[2]++ = fouropixels[1];
*olineptrs[0]++ = fouropixels[0];
*olineptrs[1]++ = fouropixels[0];
*olineptrs[2]++ = fouropixels[0];
#endif
} while (x-=4);
olineptrs[0] += 2*screen->pitch/4;
olineptrs[1] += 2*screen->pitch/4;
olineptrs[2] += 2*screen->pitch/4;
}
}
if ( SDL_MUSTLOCK(screen) ) {
SDL_UnlockSurface(screen);
}
SDL_UpdateRect(screen, 0, 0, 0, 0);
SDL_Flip(screen);
}
//
// I_ReadScreen
//
void I_ReadScreen (byte* scr)
{
memcpy (scr, screens[0], SCREENWIDTH*SCREENHEIGHT);
}
//
// I_SetPalette
//
void I_SetPalette (byte* palette)
{
int i;
SDL_Color colors[256];
for ( i=0; i<256; ++i ) {
colors[i].r = gammatable[usegamma][*palette++];
colors[i].g = gammatable[usegamma][*palette++];
colors[i].b = gammatable[usegamma][*palette++];
colors[i].unused = 0;
}
SDL_SetColors(screen, colors, 0, 256);
}
void I_InitGraphics(void)
{
static int firsttime=1;
Uint16 video_w, video_h, w, h;
Uint8 video_bpp;
Uint32 video_flags;
if (!firsttime)
return;
firsttime = 0;
video_flags = (SDL_DOUBLEBUF | SDL_HWSURFACE);
if (!!M_CheckParm("-fullscreen"))
video_flags |= SDL_FULLSCREEN;
#ifdef _EE
video_flags |= SDL_FULLSCREEN;
#endif
if (M_CheckParm("-2"))
multiply = 2;
if (M_CheckParm("-3"))
multiply = 3;
// check if the user wants to grab the mouse (quite unnice)
grabMouse = !!M_CheckParm("-grabmouse");
video_w = w = SCREENWIDTH * multiply;
video_h = h = SCREENHEIGHT * multiply;
video_bpp = 8;
/* We need to allocate a software surface because the DOOM! code expects
the screen surface to be valid all of the time. Properly done, the
rendering code would allocate the video surface in video memory and
then call SDL_LockSurface()/SDL_UnlockSurface() around frame rendering.
Eventually SDL will support flipping, which would be really nice in
a complete-frame rendering application like this.
*/
switch (video_w/w) {
case 3:
multiply *= 3;
break;
case 2:
multiply *= 2;
break;
case 1:
multiply *= 1;
break;
default:
;
}
if ( multiply > 3 ) {
I_Error("Smallest available mode (%dx%d) is too large!",
video_w, video_h);
}
screen = SDL_SetVideoMode(video_w, video_h, 8, video_flags);
if ( screen == NULL ) {
I_Error("Could not set %dx%d video mode: %s", video_w, video_h,
SDL_GetError());
}
SDL_ShowCursor(0);
SDL_WM_SetCaption("SDL DOOM! v1.10", "doom");
/* Set up the screen displays */
w = SCREENWIDTH * multiply;
h = SCREENHEIGHT * multiply;
if (multiply == 1 && !SDL_MUSTLOCK(screen) ) {
screens[0] = (unsigned char *) screen->pixels;
} else {
screens[0] = (unsigned char *) malloc (SCREENWIDTH * SCREENHEIGHT);
if ( screens[0] == NULL )
I_Error("Couldn't allocate screen memory");
}
}