forked from KolibriOS/kolibrios
509 lines
10 KiB
C
Executable File
509 lines
10 KiB
C
Executable File
/* Fireworks demo written by Dave Ashley */
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/* dash@xdr.com */
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/* http://www.xdr.com/dash */
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/* Sat Jun 13 02:46:09 PDT 1998 */
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/* This is my first attempt at an SDL program */
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/* See the SDL home page http://www.devolution.com/~slouken/projects/SDL/ */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "SDL.h"
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#define XSIZE 640
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#define YSIZE 480
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SDL_Surface *thescreen;
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unsigned char *vmem1, *vmem2;
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int mousex,mousey;
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SDL_Color themap[256];
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int scrlock()
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{
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if(SDL_MUSTLOCK(thescreen))
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{
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if ( SDL_LockSurface(thescreen) < 0 )
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{
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SDL_printf("Couldn't lock display surface: %s\n",
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SDL_GetError());
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return -1;
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}
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}
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return 0;
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}
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void scrunlock(void)
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{
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if(SDL_MUSTLOCK(thescreen))
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SDL_UnlockSurface(thescreen);
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SDL_UpdateRect(thescreen, 0, 0, 0, 0);
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}
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#define MOUSEFRAC 2
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#define MAXBLOBS 512
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#define BLOBFRAC 6
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#define BLOBGRAVITY 5
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#define THRESHOLD 20
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#define SMALLSIZE 3
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#define BIGSIZE 6
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#define ABS(x) ((x)<0 ? -(x) : (x))
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int explodenum;
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char sizes[]={2,3,4,5,8,5,4,3};
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struct blob {
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struct blob *blobnext;
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int blobx;
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int bloby;
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int blobdx;
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int blobdy;
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int bloblife;
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int blobsize;
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} *blobs,*freeblobs,*activeblobs;
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unsigned char **mul640;
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int oldmode;
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char sqrttab[]={
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0,1,1,1,2,2,2,2,2,3,3,3,3,3,3,3,
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4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,
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5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,
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6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
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8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
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8,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
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9,9,9,9,10,10,10,10,10,10,10,10,10,10,10,10,
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10,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11,
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11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,
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12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,
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12,12,12,12,12,12,12,12,12,13,13,13,13,13,13,13,
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13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,
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13,13,13,13,14,14,14,14,14,14,14,14,14,14,14,14,
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14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,
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14,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
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15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15
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};
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void nomem(void)
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{
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SDL_printf("Not enough low memory!\n");
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SDL_Quit();
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exit(1);
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}
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void fire(unsigned char *p1,unsigned char *p2,int pitch,char *map)
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{
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int x,y;
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unsigned char *p3, *p4;
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for(y=2;y<YSIZE;y++)
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{
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for(x=0;x<XSIZE;x++)
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{
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p3 = p1+y*XSIZE+x;
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p4 = p2+y*pitch+x;
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*p4=map[*p3+p3[-XSIZE]+p3[-XSIZE-1]+p3[-XSIZE+1]+p3[-1]+p3[1]+p3[-XSIZE-XSIZE-1]+p3[-XSIZE-XSIZE]+p3[-XSIZE-XSIZE+1]];
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}
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}
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}
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void disk(x,y,rad)
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{
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unsigned char *p;
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int i,j,k,aj;
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int rad2=rad*rad;
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int w;
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for(j=-rad;j<=rad;j++)
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{
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w=sqrttab[rad2-j*j];
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aj=ABS(j)<<2;
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if(w)
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{
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p=mul640[y+j]+x-w;
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k=w+w+1;
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i=-w;
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while(k--) {*p++=255-(ABS(i)<<2)-aj;i++;}
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}
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}
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}
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void trydisk(void)
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{
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if(mousex>10 && mousex<XSIZE-10 && mousey>10 && mousey<YSIZE-10)
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disk(mousex,mousey,8);
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}
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void addblob(void)
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{
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int dx,dy;
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struct blob *ablob;
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if(!freeblobs) return;
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dx=(rand()&255)-128;
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dy=(rand()%200)+340;
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ablob=freeblobs;
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freeblobs=freeblobs->blobnext;
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ablob->bloblife=(rand()&511)+256;
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ablob->blobdx=dx;
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ablob->blobdy=dy;
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ablob->blobx=(256+(rand()&127))<<BLOBFRAC;
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ablob->bloby=2<<BLOBFRAC;
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ablob->blobnext=activeblobs;
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ablob->blobsize=BIGSIZE;
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activeblobs=ablob;
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}
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void moveblobs(void)
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{
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struct blob **lastblob,*ablob;
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int x,y;
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lastblob=&activeblobs;
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while(ablob=*lastblob)
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{
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x=ablob->blobx>>BLOBFRAC;
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y=ablob->bloby>>BLOBFRAC;
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if(!--ablob->bloblife || y<0 || x<10 || x>XSIZE-10)
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{
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*lastblob=ablob->blobnext;
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ablob->blobnext=freeblobs;
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freeblobs=ablob;
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continue;
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}
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ablob->blobx+=ablob->blobdx;
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ablob->bloby+=ablob->blobdy;
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ablob->blobdy-=BLOBGRAVITY;
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lastblob=&ablob->blobnext;
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}
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}
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void putblobs(void)
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{
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struct blob *ablob,*ablob2,*temp;
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int x,y,dy;
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int i,size;
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long x2,y2,vel;
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ablob=activeblobs;
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activeblobs=0;
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while(ablob)
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{
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dy=ablob->blobdy;
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if(ablob->blobsize!=SMALLSIZE && (dy>-THRESHOLD && dy<THRESHOLD && !(rand()&7) || (rand()&127)==63))
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{
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i=explodenum;
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while(i-- && freeblobs)
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{
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ablob2=freeblobs;
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freeblobs=freeblobs->blobnext;
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ablob2->blobx=ablob->blobx;
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ablob2->bloby=ablob->bloby;
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for(;;)
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{
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x2=(rand()&511)-256;
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y2=(rand()&511)-256;
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vel=x2*x2+y2*y2;
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if(vel>0x3000 && vel<0x10000L) break;
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}
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ablob2->blobdx=ablob->blobdx+x2;
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ablob2->blobdy=ablob->blobdy+y2;
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ablob2->bloblife=16+(rand()&31);
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ablob2->blobsize=SMALLSIZE;
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ablob2->blobnext=activeblobs;
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activeblobs=ablob2;
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ablob->bloblife=1;
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}
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}
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x=ablob->blobx>>BLOBFRAC;
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y=ablob->bloby>>BLOBFRAC;
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size=ablob->blobsize;
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if(size==BIGSIZE && ablob->blobdy>0 && ablob->blobdy<200)
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size=sizes[ablob->bloblife&7];
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if(x>10 && x<XSIZE-10 && y>10 && y<YSIZE-10)
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disk(x,YSIZE-1-y,size);
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temp=ablob;
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ablob=ablob->blobnext;
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temp->blobnext=activeblobs;
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activeblobs=temp;
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}
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}
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#define RATE 1
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void normal(char *map)
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{
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int i,j;
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for(i=0;i<8192;i++)
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{
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j=i/9;
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map[i]=j<256 ? (j>=RATE ? j-RATE : 0) : 255;
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}
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}
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void bright(char *map)
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{
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int i;
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for(i=0;i<8192;i++) map[i]=i>>3<255 ? (i>>3) : 255;
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}
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void updatemap(void)
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{
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SDL_SetColors(thescreen, themap, 0, 256);
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}
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void loadcolor(int n,int r,int g,int b)
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{
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themap[n].r=r<<2;
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themap[n].g=g<<2;
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themap[n].b=b<<2;
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}
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void loadcolors(unsigned int which)
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{
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int i,j;
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int r,g,b;
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which%=11;
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for(i=0;i<256;i++)
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{
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switch(which)
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{
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case 0:
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if(i<64) loadcolor(i,0,0,0);
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else if(i<128) loadcolor(i,i-64,0,0);
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else if(i<192) loadcolor(i,63,i-128,0);
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else loadcolor(i,63,63,i-192);
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break;
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case 1:
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if(i<64) loadcolor(i,0,0,0);
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else if(i<128) loadcolor(i,0,0,i-64);
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else loadcolor(i,(i-128)>>1,(i-128)>>1,63);
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break;
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case 2:
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loadcolor(i,i>>2,i>>2,i>>2);
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break;
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case 3:
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r=rand()&0x3f;
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g=rand()&0x3f;
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b=rand()&0x3f;
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loadcolor(i,r*i>>8,g*i>>8,b*i>>8);
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break;
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case 4:
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loadcolor(i,i>>2,0,0);
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break;
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case 5:
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loadcolor(i,0,i>>2,0);
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break;
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case 6:
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loadcolor(i,0,0,i>>2);
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break;
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case 7:
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j=i&15;
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if(i&16) j=15-j;
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j=(i>>2)*j/16;
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loadcolor(i,j,j,j);
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break;
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case 8:
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j=0;
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if(i>8 && i<128) j=63;
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loadcolor(i,j,j,j);
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break;
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case 9:
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j=31-(i&31)<<1;
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r=i&32 ? j : 0;
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g=i&64 ? j : 0;
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b=i&128 ? j : 0;
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loadcolor(i,r,g,b);
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break;
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case 10:
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j=(i&15)<<2;
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if(i&16) j=63-j;
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r=i&32 ? j : 0;
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g=i&64 ? j : 0;
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b=i&128 ? j : 0;
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loadcolor(i,r,g,b);
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break;
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}
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}
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updatemap();
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}
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int main(int argc, char *argv[])
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{
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int i,k;
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char *remap,*remap2;
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unsigned char *p1, *p2;
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long frames;
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int flash;
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int whichmap;
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int key;
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int ispaused;
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unsigned long videoflags;
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int done;
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int now;
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SDL_Event event;
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long starttime;
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int buttonstate;
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srand(time(NULL));
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if ( SDL_Init(SDL_INIT_VIDEO) < 0 )
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{
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SDL_printf("Couldn't initialize SDL: %s\n",SDL_GetError());
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exit(1);
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}
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videoflags = SDL_SWSURFACE;
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thescreen = SDL_SetVideoMode(XSIZE, YSIZE, 8, videoflags);
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if ( thescreen == NULL )
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{
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SDL_printf("Couldn't set display mode: %s\n",
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SDL_GetError());
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SDL_Quit();
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exit(5);
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}
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vmem1=NULL;
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vmem2=malloc(XSIZE*YSIZE);
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if(!vmem2) nomem();
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mul640=malloc(YSIZE*sizeof(char *));
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if(!mul640) nomem();
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remap=malloc(16384);
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if(!remap) nomem();
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remap2=malloc(16384);
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if(!remap2) nomem();
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blobs=malloc(MAXBLOBS*sizeof(struct blob));
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if(!blobs) nomem();
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SDL_printf("Fire demo by David Ashley (dash@xdr.com)");
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SDL_printf("1 = Change color map");
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SDL_printf("2 = Randomly change color map");
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SDL_printf("p = Pause");
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SDL_printf("spc = Fire");
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SDL_printf("esc = Exit");
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SDL_printf("Left mouse button = paint");
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SDL_printf("Right mouse button, CR = ignite atmosphere");
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freeblobs=activeblobs=0;
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for(i=0;i<MAXBLOBS;i++)
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{
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blobs[i].blobnext=freeblobs;
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freeblobs=blobs+i;
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}
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normal(remap);
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bright(remap2);
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flash=0;
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whichmap=0;
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loadcolors(whichmap);
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frames=0;
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ispaused=0;
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addblob();
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done = 0;
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now=0;
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starttime=SDL_GetTicks();
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buttonstate=0;
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mousex=mousey=0;
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while(!done)
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{
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if ( scrlock() < 0 ) continue;
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frames++;
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if ( vmem1 != (unsigned char *)thescreen->pixels )
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{
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p1=vmem1=thescreen->pixels;
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for (i=0;i<YSIZE;i++)
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{
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mul640[i]=i*thescreen->pitch+vmem1;
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memset(p1,0,XSIZE);
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p1+=thescreen->pitch;
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}
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}
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if(!ispaused)
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{
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now++;
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if(!flash)
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{
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if(explodenum>96 && explodenum<160 && !(rand()&511) || (buttonstate&8))
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flash=60;
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} else --flash;
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explodenum=(now>>4)+1;if(explodenum==320) now=0;
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if(explodenum>256) explodenum=256;
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if(!(rand()&31))
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addblob();
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moveblobs();
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putblobs();
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if(buttonstate&2) trydisk();
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p1=vmem1;
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p2=vmem2;
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k=thescreen->pitch;
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for(i=0;i<YSIZE;i++)
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{
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memcpy(p2,p1,XSIZE);
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p2+=XSIZE;
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p1+=k;
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}
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fire(vmem2,vmem1,k,flash ? remap2 :remap);
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}
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scrunlock();
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while(SDL_PollEvent(&event))
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{
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switch (event.type)
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{
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case SDL_MOUSEBUTTONDOWN:
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case SDL_MOUSEBUTTONUP:
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if ( event.button.state == SDL_PRESSED )
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buttonstate|=1<<event.button.button;
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else
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buttonstate&=~(1<<event.button.button);
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mousex=event.button.x;
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mousey=event.button.y;
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if(!ispaused && buttonstate&2) trydisk();
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break;
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case SDL_MOUSEMOTION:
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mousex=event.motion.x;
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mousey=event.motion.y;
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if(!ispaused && buttonstate&2) trydisk();
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break;
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case SDL_KEYDOWN:
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key=event.key.keysym.sym;
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if(key==SDLK_RETURN) {flash=60;break;}
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if(key==SDLK_1 || key==SDLK_2)
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{
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if(key==SDLK_1)
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++whichmap;
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else
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whichmap=rand();
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loadcolors(whichmap);
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break;
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}
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if(key==SDLK_ESCAPE) {done=1;break;}
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if(key==SDLK_SPACE && !ispaused) {addblob();break;}
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if(key==SDLK_p) {ispaused=!ispaused;break;}
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break;
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case SDL_QUIT:
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done = 1;
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break;
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default:
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break;
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}
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}
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}
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starttime=SDL_GetTicks()-starttime;
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if(!starttime) starttime=1;
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SDL_Quit();
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SDL_printf("fps = %d\n",1000*frames/starttime);
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exit(0);
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}
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