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/* Emacs style mode select -*- C++ -*-
*-----------------------------------------------------------------------------
*
*
* PrBoom: a Doom port merged with LxDoom and LSDLDoom
* based on BOOM, a modified and improved DOOM engine
* Copyright (C) 1999 by
* id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
* Copyright (C) 1999-2000 by
* Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
* Copyright 2005, 2006 by
* Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
*
* 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 the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* DESCRIPTION:
* Mission begin melt/wipe screen special effect.
*
*-----------------------------------------------------------------------------
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "z_zone.h"
#include "doomdef.h"
#include "i_video.h"
#include "v_video.h"
#include "m_random.h"
#include "f_wipe.h"
//
// SCREEN WIPE PACKAGE
//
// Parts re-written to support true-color video modes. Column-major
// formatting removed. - POPE
// CPhipps - macros for the source and destination screens
#define SRC_SCR 2
#define DEST_SCR 3
static screeninfo_t wipe_scr_start;
static screeninfo_t wipe_scr_end;
static screeninfo_t wipe_scr;
static int y_lookup[MAX_SCREENWIDTH];
static int wipe_initMelt(int ticks)
{
int i;
// copy start screen to main screen
for(i=0;i<SCREENHEIGHT;i++)
memcpy(wipe_scr.data+i*wipe_scr.byte_pitch,
wipe_scr_start.data+i*wipe_scr.byte_pitch,
SCREENWIDTH*V_GetPixelDepth());
// setup initial column positions (y<0 => not ready to scroll yet)
y_lookup[0] = -(M_Random()%16);
for (i=1;i<SCREENWIDTH;i++)
{
int r = (M_Random()%3) - 1;
y_lookup[i] = y_lookup[i-1] + r;
if (y_lookup[i] > 0)
y_lookup[i] = 0;
else
if (y_lookup[i] == -16)
y_lookup[i] = -15;
}
return 0;
}
static int wipe_doMelt(int ticks)
{
boolean done = true;
int i;
const int depth = V_GetPixelDepth();
while (ticks--) {
for (i=0;i<(SCREENWIDTH);i++) {
if (y_lookup[i]<0) {
y_lookup[i]++;
done = false;
continue;
}
if (y_lookup[i] < SCREENHEIGHT) {
byte *s, *d;
int j, k, dy;
/* cph 2001/07/29 -
* The original melt rate was 8 pixels/sec, i.e. 25 frames to melt
* the whole screen, so make the melt rate depend on SCREENHEIGHT
* so it takes no longer in high res
*/
dy = (y_lookup[i] < 16) ? y_lookup[i]+1 : SCREENHEIGHT/25;
if (y_lookup[i]+dy >= SCREENHEIGHT)
dy = SCREENHEIGHT - y_lookup[i];
s = wipe_scr_end.data + (y_lookup[i]*wipe_scr_end.byte_pitch+(i*depth));
d = wipe_scr.data + (y_lookup[i]*wipe_scr.byte_pitch+(i*depth));
for (j=dy;j;j--) {
for (k=0; k<depth; k++)
d[k] = s[k];
d += wipe_scr.byte_pitch;
s += wipe_scr_end.byte_pitch;
}
y_lookup[i] += dy;
s = wipe_scr_start.data + (i*depth);
d = wipe_scr.data + (y_lookup[i]*wipe_scr.byte_pitch+(i*depth));
for (j=SCREENHEIGHT-y_lookup[i];j;j--) {
for (k=0; k<depth; k++)
d[k] = s[k];
d += wipe_scr.byte_pitch;
s += wipe_scr_end.byte_pitch;
}
done = false;
}
}
}
return done;
}
// CPhipps - modified to allocate and deallocate screens[2 to 3] as needed, saving memory
static int wipe_exitMelt(int ticks)
{
V_FreeScreen(&wipe_scr_start);
wipe_scr_start.width = 0;
wipe_scr_start.height = 0;
V_FreeScreen(&wipe_scr_end);
wipe_scr_end.width = 0;
wipe_scr_end.height = 0;
// Paranoia
screens[SRC_SCR] = wipe_scr_start;
screens[DEST_SCR] = wipe_scr_end;
return 0;
}
int wipe_StartScreen(void)
{
wipe_scr_start.width = SCREENWIDTH;
wipe_scr_start.height = SCREENHEIGHT;
wipe_scr_start.byte_pitch = screens[0].byte_pitch;
wipe_scr_start.short_pitch = screens[0].short_pitch;
wipe_scr_start.int_pitch = screens[0].int_pitch;
wipe_scr_start.not_on_heap = false;
V_AllocScreen(&wipe_scr_start);
screens[SRC_SCR] = wipe_scr_start;
V_CopyRect(0, 0, 0, SCREENWIDTH, SCREENHEIGHT, 0, 0, SRC_SCR, VPT_NONE ); // Copy start screen to buffer
return 0;
}
int wipe_EndScreen(void)
{
wipe_scr_end.width = SCREENWIDTH;
wipe_scr_end.height = SCREENHEIGHT;
wipe_scr_end.byte_pitch = screens[0].byte_pitch;
wipe_scr_end.short_pitch = screens[0].short_pitch;
wipe_scr_end.int_pitch = screens[0].int_pitch;
wipe_scr_end.not_on_heap = false;
V_AllocScreen(&wipe_scr_end);
screens[DEST_SCR] = wipe_scr_end;
V_CopyRect(0, 0, 0, SCREENWIDTH, SCREENHEIGHT, 0, 0, DEST_SCR, VPT_NONE); // Copy end screen to buffer
V_CopyRect(0, 0, SRC_SCR, SCREENWIDTH, SCREENHEIGHT, 0, 0, 0 , VPT_NONE); // restore start screen
return 0;
}
// killough 3/5/98: reformatted and cleaned up
int wipe_ScreenWipe(int ticks)
{
static boolean go; // when zero, stop the wipe
if (!go) // initial stuff
{
go = 1;
wipe_scr = screens[0];
wipe_initMelt(ticks);
}
// do a piece of wipe-in
if (wipe_doMelt(ticks)) // final stuff
{
wipe_exitMelt(ticks);
go = 0;
}
return !go;
}
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