f_wipe.c
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上传用户:xuyinpeng
上传日期:2021-05-12
资源大小:455k
文件大小:5k
源码类别:
射击游戏
开发平台:
Visual C++
- // 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:
- // Mission begin melt/wipe screen special effect.
- //
- //-----------------------------------------------------------------------------
- static const char rcsid[] = "$Id: f_wipe.c,v 1.2 1997/02/03 22:45:09 b1 Exp $";
- #include "z_zone.h"
- #include "i_video.h"
- #include "v_video.h"
- #include "m_random.h"
- #include "doomdef.h"
- #include "f_wipe.h"
- //
- // SCREEN WIPE PACKAGE
- //
- // when zero, stop the wipe
- static boolean go = 0;
- static byte* wipe_scr_start;
- static byte* wipe_scr_end;
- static byte* wipe_scr;
- void
- wipe_shittyColMajorXform
- ( short* array,
- int width,
- int height )
- {
- int x;
- int y;
- short* dest;
- dest = (short*) Z_Malloc(width*height*2, PU_STATIC, 0);
- 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*2);
- Z_Free(dest);
- }
- int
- wipe_initColorXForm
- ( int width,
- int height,
- int ticks )
- {
- memcpy(wipe_scr, wipe_scr_start, width*height);
- return 0;
- }
- int
- wipe_doColorXForm
- ( int width,
- int height,
- int ticks )
- {
- boolean changed;
- byte* w;
- byte* e;
- int newval;
- changed = false;
- w = wipe_scr;
- e = wipe_scr_end;
- while (w!=wipe_scr+width*height)
- {
- if (*w != *e)
- {
- if (*w > *e)
- {
- newval = *w - ticks;
- if (newval < *e)
- *w = *e;
- else
- *w = newval;
- changed = true;
- }
- else if (*w < *e)
- {
- newval = *w + ticks;
- if (newval > *e)
- *w = *e;
- else
- *w = newval;
- changed = true;
- }
- }
- w++;
- e++;
- }
- return !changed;
- }
- int
- wipe_exitColorXForm
- ( int width,
- int height,
- int ticks )
- {
- return 0;
- }
- static int* y;
- int
- wipe_initMelt
- ( int width,
- int height,
- int ticks )
- {
- int i, r;
- // 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 *) Z_Malloc(width*sizeof(int), PU_STATIC, 0);
- y[0] = -(M_Random()%16);
- for (i=1;i<width;i++)
- {
- 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;
- }
- int
- wipe_doMelt
- ( int width,
- int height,
- int ticks )
- {
- int i;
- int j;
- int dy;
- int idx;
- short* s;
- short* d;
- boolean done = true;
- width/=2;
- while (ticks--)
- {
- for (i=0;i<width;i++)
- {
- if (y[i]<0)
- {
- y[i]++; done = false;
- }
- else if (y[i] < height)
- {
- 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;
- }
- int
- wipe_exitMelt
- ( int width,
- int height,
- int ticks )
- {
- Z_Free(y);
- return 0;
- }
- int
- wipe_StartScreen
- ( int x,
- int y,
- int width,
- int height )
- {
- wipe_scr_start = screens[2];
- I_ReadScreen(wipe_scr_start);
- return 0;
- }
- int
- wipe_EndScreen
- ( int x,
- int y,
- int width,
- int height )
- {
- wipe_scr_end = screens[3];
- I_ReadScreen(wipe_scr_end);
- V_DrawBlock(x, y, 0, width, height, wipe_scr_start); // restore start scr.
- return 0;
- }
- int
- wipe_ScreenWipe
- ( int wipeno,
- int x,
- int y,
- int width,
- int height,
- int ticks )
- {
- int rc;
- static int (*wipes[])(int, int, int) =
- {
- wipe_initColorXForm, wipe_doColorXForm, wipe_exitColorXForm,
- wipe_initMelt, wipe_doMelt, wipe_exitMelt
- };
- void V_MarkRect(int, int, int, int);
- // initial stuff
- if (!go)
- {
- go = 1;
- // wipe_scr = (byte *) Z_Malloc(width*height, PU_STATIC, 0); // DEBUG
- wipe_scr = screens[0];
- (*wipes[wipeno*3])(width, height, ticks);
- }
- // do a piece of wipe-in
- V_MarkRect(0, 0, width, height);
- rc = (*wipes[wipeno*3+1])(width, height, ticks);
- // V_DrawBlock(x, y, 0, width, height, wipe_scr); // DEBUG
- // final stuff
- if (rc)
- {
- go = 0;
- (*wipes[wipeno*3+2])(width, height, ticks);
- }
- return !go;
- }