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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
*
* 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.
*
*-----------------------------------------------------------------------------
*/
#include "rockmacros.h"
#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
//
// CPhipps - macros for the source and destination screens
#define SRC_SCR 2
#define DEST_SCR 3
static byte *wipe_scr_start;
static byte *wipe_scr_end;
static byte *wipe_scr;
static void wipe_shittyColMajorXform(short *array, int width, int height)
{
short *dest = Z_Malloc(width*height*sizeof(short), PU_STATIC, 0);
int x, y;
for(y=0;y<height;y++)
for(x=0;x<width;x++)
dest[x*height+y] = array[y*width+x];
memcpy(array, dest, width*height*sizeof(short));
Z_Free(dest);
}
static int *y;
static int wipe_initMelt(int width, int height, int ticks)
{
(void)ticks;
int i;
// copy start screen to main screen
memcpy(wipe_scr, wipe_scr_start, width*height);
// makes this wipe faster (in theory)
// to have stuff in column-major format
wipe_shittyColMajorXform((short*)wipe_scr_start, width/2, height);
wipe_shittyColMajorXform((short*)wipe_scr_end, width/2, height);
// setup initial column positions (y<0 => not ready to scroll yet)
y = (int *) malloc(width*sizeof(int));
y[0] = -(M_Random()%16);
for (i=1;i<width;i++)
{
int r = (M_Random()%3) - 1;
y[i] = y[i-1] + r;
if (y[i] > 0)
y[i] = 0;
else
if (y[i] == -16)
y[i] = -15;
}
return 0;
}
static int wipe_doMelt(int width, int height, int ticks)
{
boolean done = true;
int i;
width /= 2;
while (ticks--)
for (i=0;i<width;i++)
if (y[i]<0)
{
y[i]++;
done = false;
}
else
if (y[i] < height)
{
short *s, *d;
int j, dy, idx;
dy = (y[i] < 16) ? y[i]+1 : 8;
if (y[i]+dy >= height)
dy = height - y[i];
s = &((short *)wipe_scr_end)[i*height+y[i]];
d = &((short *)wipe_scr)[y[i]*width+i];
idx = 0;
for (j=dy;j;j--)
{
d[idx] = *(s++);
idx += width;
}
y[i] += dy;
s = &((short *)wipe_scr_start)[i*height];
d = &((short *)wipe_scr)[y[i]*width+i];
idx = 0;
for (j=height-y[i];j;j--)
{
d[idx] = *(s++);
idx += width;
}
done = false;
}
return done;
}
// CPhipps - modified to allocate and deallocate d_screens[2 to 3] as needed, saving memory
static int wipe_exitMelt(int width, int height, int ticks)
{
(void)width;
(void)height;
(void)ticks;
free(y);
free(wipe_scr_start);
free(wipe_scr_end);
// Paranoia
y = NULL;
wipe_scr_start = wipe_scr_end = d_screens[SRC_SCR] = d_screens[DEST_SCR] = NULL;
return 0;
}
int wipe_StartScreen(int x, int y, int width, int height)
{
wipe_scr_start = d_screens[SRC_SCR] = malloc(SCREENWIDTH * SCREENHEIGHT);
V_CopyRect(x, y, 0, width, height, x, y, SRC_SCR, VPT_NONE ); // Copy start screen to buffer
return 0;
}
int wipe_EndScreen(int x, int y, int width, int height)
{
wipe_scr_end = d_screens[DEST_SCR] = malloc(SCREENWIDTH * SCREENHEIGHT);
V_CopyRect(x, y, 0, width, height, x, y, DEST_SCR, VPT_NONE); // Copy end screen to buffer
V_CopyRect(x, y, SRC_SCR, width, height, x, y, 0 , VPT_NONE); // restore start screen
return 0;
}
// killough 3/5/98: reformatted and cleaned up
int wipe_ScreenWipe(int x, int y, int width, int height, int ticks)
{
(void)x;
(void)y;
static boolean go; // when zero, stop the wipe
if (!go) // initial stuff
{
go = 1;
wipe_scr = d_screens[0];
wipe_initMelt(width, height, ticks);
}
V_MarkRect(0, 0, width, height); // do a piece of wipe-in
if (wipe_doMelt(width, height, ticks)) // final stuff
{
wipe_exitMelt(width, height, ticks);
go = 0;
}
return !go;
}
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