mirror of
https://github.com/ZDoom/gzdoom-gles.git
synced 2024-11-19 10:51:26 +00:00
430 lines
9.1 KiB
C++
430 lines
9.1 KiB
C++
// Emacs style mode select -*- C++ -*-
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//-----------------------------------------------------------------------------
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//
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// $Id:$
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//
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// Copyright (C) 1993-1996 by id Software, Inc.
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//
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// This source is available for distribution and/or modification
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// only under the terms of the DOOM Source Code License as
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// published by id Software. All rights reserved.
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//
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// The source is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
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// for more details.
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//
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// $Log:$
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//
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// DESCRIPTION:
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// Mission begin melt/wipe screen special effect.
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//
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//-----------------------------------------------------------------------------
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#include "i_video.h"
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#include "v_video.h"
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#include "m_random.h"
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#include "m_alloc.h"
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#include "doomdef.h"
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#include "f_wipe.h"
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#include "c_cvars.h"
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//
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// SCREEN WIPE PACKAGE
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//
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static int CurrentWipeType;
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static short *wipe_scr_start;
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static short *wipe_scr_end;
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static int *y;
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// [RH] Fire Wipe
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#define FIREWIDTH 64
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#define FIREHEIGHT 64
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static byte *burnarray;
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static int density;
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static int burntime;
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// [RH] Crossfade
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static int fade;
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// Melt -------------------------------------------------------------
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void wipe_shittyColMajorXform (short *array)
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{
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int x, y;
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short *dest;
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int width = SCREENWIDTH / 2;
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dest = new short[width*SCREENHEIGHT*2];
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for(y = 0; y < SCREENHEIGHT; y++)
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for(x = 0; x < width; x++)
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dest[x*SCREENHEIGHT+y] = array[y*width+x];
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memcpy(array, dest, SCREENWIDTH*SCREENHEIGHT);
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delete[] dest;
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}
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int wipe_initMelt (int ticks)
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{
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int i, r;
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// copy start screen to main screen
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screen->DrawBlock (0, 0, SCREENWIDTH, SCREENHEIGHT, (byte *)wipe_scr_start);
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// makes this wipe faster (in theory)
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// to have stuff in column-major format
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wipe_shittyColMajorXform (wipe_scr_start);
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wipe_shittyColMajorXform (wipe_scr_end);
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// setup initial column positions
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// (y<0 => not ready to scroll yet)
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y = new int[SCREENWIDTH*sizeof(int)];
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y[0] = -(M_Random()&0xf);
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for (i = 1; i < SCREENWIDTH; i++)
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{
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r = (M_Random()%3) - 1;
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y[i] = y[i-1] + r;
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if (y[i] > 0) y[i] = 0;
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else if (y[i] == -16) y[i] = -15;
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}
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return 0;
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}
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int wipe_doMelt (int ticks)
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{
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int i;
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int j;
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int dy;
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int idx;
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short* s;
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short* d;
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BOOL done = true;
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int width = SCREENWIDTH / 2;
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while (ticks--)
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{
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for (i = 0; i < width; i++)
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{
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if (y[i] < 0)
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{
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y[i]++; done = false;
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}
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else if (y[i] < SCREENHEIGHT)
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{
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int pitch = screen->GetPitch() / 2;
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dy = (y[i] < 16) ? y[i]+1 : 8;
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dy = (dy * SCREENHEIGHT) / 200;
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if (y[i]+dy >= SCREENHEIGHT)
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dy = SCREENHEIGHT - y[i];
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s = &wipe_scr_end[i*SCREENHEIGHT+y[i]];
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d = &((short *)screen->GetBuffer())[y[i]*pitch+i];
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idx = 0;
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for (j=dy;j;j--)
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{
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d[idx] = *(s++);
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idx += pitch;
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}
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y[i] += dy;
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s = &wipe_scr_start[i*SCREENHEIGHT];
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d = &((short *)screen->GetBuffer())[y[i]*pitch+i];
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idx = 0;
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for (j=SCREENHEIGHT-y[i];j;j--)
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{
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d[idx] = *(s++);
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idx += pitch;
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}
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done = false;
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}
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}
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}
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return done;
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}
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int wipe_exitMelt (int ticks)
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{
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delete[] wipe_scr_start;
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delete[] wipe_scr_end;
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delete[] y;
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return 0;
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}
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// Burn -------------------------------------------------------------
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int wipe_initBurn (int ticks)
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{
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burnarray = new byte[FIREWIDTH * (FIREHEIGHT+5)];
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memset (burnarray, 0, FIREWIDTH * (FIREHEIGHT+5));
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density = 4;
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burntime = 0;
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return 0;
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}
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int wipe_doBurn (int ticks)
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{
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static int voop;
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BOOL done;
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// This is a modified version of the fire from the player
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// setup menu.
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burntime += ticks;
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ticks *= 2;
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// Make the fire burn
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while (ticks--)
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{
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int a, b;
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byte *from;
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// generator
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from = burnarray + FIREHEIGHT * FIREWIDTH;
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b = voop;
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voop += density / 3;
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for (a = 0; a < density/8; a++)
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{
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unsigned int offs = (a+b) % FIREWIDTH;
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unsigned int v = M_Random();
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v = from[offs] + 4 + (v & 15) + (v >> 3) + (M_Random() & 31);
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if (v > 255)
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v = 255;
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from[offs] = from[FIREWIDTH*2 + (offs + FIREWIDTH*3/2)%FIREWIDTH] = v;
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}
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density += 10;
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if (density > FIREWIDTH*7)
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density = FIREWIDTH*7;
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from = burnarray;
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for (b = 0; b <= FIREHEIGHT; b += 2)
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{
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byte *pixel = from;
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// special case: first pixel on line
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byte *p = pixel + (FIREWIDTH << 1);
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unsigned int top = *p + *(p + FIREWIDTH - 1) + *(p + 1);
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unsigned int bottom = *(pixel + (FIREWIDTH << 2));
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unsigned int c1 = (top + bottom) >> 2;
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if (c1 > 1) c1--;
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*pixel = c1;
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*(pixel + FIREWIDTH) = (c1 + bottom) >> 1;
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pixel++;
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// main line loop
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for (a = 1; a < FIREWIDTH-1; a++)
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{
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// sum top pixels
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p = pixel + (FIREWIDTH << 1);
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top = *p + *(p - 1) + *(p + 1);
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// bottom pixel
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bottom = *(pixel + (FIREWIDTH << 2));
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// combine pixels
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c1 = (top + bottom) >> 2;
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if (c1 > 1) c1--;
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// store pixels
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*pixel = c1;
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*(pixel + FIREWIDTH) = (c1 + bottom) >> 1; // interpolate
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// next pixel
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pixel++;
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}
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// special case: last pixel on line
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p = pixel + (FIREWIDTH << 1);
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top = *p + *(p - 1) + *(p - FIREWIDTH + 1);
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bottom = *(pixel + (FIREWIDTH << 2));
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c1 = (top + bottom) >> 2;
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if (c1 > 1) c1--;
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*pixel = c1;
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*(pixel + FIREWIDTH) = (c1 + bottom) >> 1;
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// next line
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from += FIREWIDTH << 1;
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}
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}
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// Draw the screen
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{
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fixed_t xstep, ystep, firex, firey;
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int x, y;
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byte *to, *fromold, *fromnew;
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xstep = (FIREWIDTH * FRACUNIT) / SCREENWIDTH;
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ystep = (FIREHEIGHT * FRACUNIT) / SCREENHEIGHT;
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to = screen->GetBuffer();
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fromold = (byte *)wipe_scr_start;
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fromnew = (byte *)wipe_scr_end;
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done = true;
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for (y = 0, firey = 0; y < SCREENHEIGHT; y++, firey += ystep)
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{
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for (x = 0, firex = 0; x < SCREENWIDTH; x++, firex += xstep)
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{
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int fglevel;
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fglevel = burnarray[(firex>>FRACBITS)+(firey>>FRACBITS)*FIREWIDTH] / 2;
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if (fglevel >= 63)
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{
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to[x] = fromnew[x];
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}
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else if (fglevel == 0)
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{
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to[x] = fromold[x];
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done = false;
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}
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else
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{
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int bglevel = 64-fglevel;
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DWORD *fg2rgb = Col2RGB8[fglevel];
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DWORD *bg2rgb = Col2RGB8[bglevel];
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DWORD fg = fg2rgb[fromnew[x]];
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DWORD bg = bg2rgb[fromold[x]];
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fg = (fg+bg) | 0x1f07c1f;
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to[x] = RGB32k[0][0][fg & (fg>>15)];
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done = false;
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}
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}
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fromold += SCREENWIDTH;
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fromnew += SCREENWIDTH;
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to += SCREENPITCH;
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}
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}
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return done || (burntime > 40);
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}
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int wipe_exitBurn (int ticks)
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{
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delete[] wipe_scr_start;
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delete[] wipe_scr_end;
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delete[] burnarray;
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return 0;
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}
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// Crossfade --------------------------------------------------------
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int wipe_initFade (int ticks)
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{
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fade = 0;
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return 0;
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}
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int wipe_doFade (int ticks)
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{
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fade += ticks;
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if (fade > 64)
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{
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screen->DrawBlock (0, 0, SCREENWIDTH, SCREENHEIGHT, (byte *)wipe_scr_end);
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return 1;
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}
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else
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{
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int x, y;
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fixed_t bglevel = 64 - fade;
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DWORD *fg2rgb = Col2RGB8[fade];
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DWORD *bg2rgb = Col2RGB8[bglevel];
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byte *fromnew = (byte *)wipe_scr_end;
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byte *fromold = (byte *)wipe_scr_start;
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byte *to = screen->GetBuffer();
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for (y = 0; y < SCREENHEIGHT; y++)
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{
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for (x = 0; x < SCREENWIDTH; x++)
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{
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DWORD fg = fg2rgb[fromnew[x]];
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DWORD bg = bg2rgb[fromold[x]];
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fg = (fg+bg) | 0x1f07c1f;
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to[x] = RGB32k[0][0][fg & (fg>>15)];
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}
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fromnew += SCREENWIDTH;
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fromold += SCREENWIDTH;
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to += SCREENPITCH;
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}
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}
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fade++;
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return 0;
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}
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int wipe_exitFade (int ticks)
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{
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return 0;
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}
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// General Wipe Functions -------------------------------------------
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int wipe_StartScreen (int type)
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{
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CurrentWipeType = type;
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if (CurrentWipeType < 0)
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CurrentWipeType = 0;
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else if (CurrentWipeType >= wipe_NUMWIPES)
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CurrentWipeType = wipe_NUMWIPES-1;
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if (CurrentWipeType)
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{
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wipe_scr_start = new short[SCREENWIDTH * SCREENHEIGHT / 2];
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screen->GetBlock (0, 0, SCREENWIDTH, SCREENHEIGHT, (byte *)wipe_scr_start);
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}
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return 0;
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}
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int wipe_EndScreen (void)
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{
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if (CurrentWipeType)
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{
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wipe_scr_end = new short[SCREENWIDTH * SCREENHEIGHT / 2];
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screen->GetBlock (0, 0, SCREENWIDTH, SCREENHEIGHT, (byte *)wipe_scr_end);
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screen->DrawBlock (0, 0, SCREENWIDTH, SCREENHEIGHT, (byte *)wipe_scr_start); // restore start scr.
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}
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return 0;
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}
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int wipe_ScreenWipe (int ticks)
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{
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static BOOL go = 0; // when zero, stop the wipe
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static int (*wipes[])(int) =
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{
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wipe_initMelt, wipe_doMelt, wipe_exitMelt,
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wipe_initBurn, wipe_doBurn, wipe_exitBurn,
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wipe_initFade, wipe_doFade, wipe_exitFade
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};
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int rc;
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if (CurrentWipeType == wipe_None)
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return true;
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// initial stuff
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if (!go)
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{
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go = 1;
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(*wipes[(CurrentWipeType-1)*3])(ticks);
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}
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// do a piece of wipe-in
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V_MarkRect(0, 0, SCREENWIDTH, SCREENHEIGHT);
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rc = (*wipes[(CurrentWipeType-1)*3+1])(ticks);
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// final stuff
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if (rc)
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{
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go = 0;
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(*wipes[(CurrentWipeType-1)*3+2])(ticks);
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}
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return !go;
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}
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