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Diffstat (limited to 'src/f_wipe.c')
| -rw-r--r-- | src/f_wipe.c | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/src/f_wipe.c b/src/f_wipe.c new file mode 100644 index 00000000..69bb1d87 --- /dev/null +++ b/src/f_wipe.c @@ -0,0 +1,305 @@ +// Emacs style mode select -*- C++ -*- +//----------------------------------------------------------------------------- +// +// $Id: f_wipe.c 4 2005-07-23 16:19:41Z fraggle $ +// +// 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. +// +// $Log$ +// Revision 1.1 2005/07/23 16:19:45 fraggle +// Initial revision +// +// +// DESCRIPTION: +// Mission begin melt/wipe screen special effect. +// +//----------------------------------------------------------------------------- + + +static const char rcsid[] = "$Id: f_wipe.c 4 2005-07-23 16:19:41Z fraggle $"; + + + +#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; + +} |