src/redraw.c

   1 /*
   2    Copyright (C) Prikol Software 1996-1997
   3    Copyright (C) Aleksey Volynskov 1996-1997
   4
   5    This file is part of the Doom2D:Rembo project.
   6
   7    Doom2D:Rembo is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License version 2 as
   9    published by the Free Software Foundation.
  10
  11    Doom2D:Rembo is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/> or
  18    write to the Free Software Foundation, Inc.,
  19    51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  20 */
  21
  22 /*
  23 #include <stdlib.h>
  24 #include <errno.h>
  25 #include <string.h>
  26 //#include "..\averr.h"
  27 #include "vga.h"
  28 #include "glob.h"
  29
  30 #define MAXRECT 500
  31
  32 typedef struct{short x,w,y,h;}rect;
  33
  34 static rect *rt,*rp;
  35 static redraw_f *fn;
  36 static short sl,st,sr,sb;
  37
  38
  39 void *RD_init(short x,short w,short y,short h) {
  40   rect *p;
  41
  42   if(!(p=malloc((MAXRECT*2+1)*sizeof(rect))))
  43     {error(0,0,ENOMEM,NULL,NULL);return NULL;}//{error(EZ_VGALIB,ET_STD,ENOMEM,NULL,NULL);return NULL;}
  44   p->x=x;p->w=x+w-1;p->y=y;p->h=y+h-1;
  45   memset(p+1,0,MAXRECT*2*sizeof(rect));
  46   return p;
  47 }
  48
  49 void RD_start(void *p,redraw_f *f) {
  50   rt=p;fn=f;
  51   sl=rt->x;sr=rt->w;
  52   st=rt->y;sb=rt->h;
  53   ++rt;
  54   rp=rt;
  55 }
  56
  57 static void add(short x,short r,short y,short b) {
  58   int i;
  59   short rx,rr,ry,rb;
  60
  61   for(i=0;i<MAXRECT;++i) if(rp[i].w) {
  62     if(x>(rr=(rx=rp[i].x)+rp[i].w-1)) continue;
  63     if(r<rx) continue;
  64     if(y>(rb=(ry=rp[i].y)+rp[i].h-1)) continue;
  65     if(b<ry) continue;
  66     if(x<rx) add(x,rx-1,y,b);
  67     if(r>rr) add(rr+1,r,y,b);
  68     if(y<ry) add(max(rx,x),min(rr,r),y,ry-1);
  69     if(b>rb) add(max(rx,x),min(rr,r),rb+1,b);
  70     return;
  71   }
  72   for(i=0;i<MAXRECT;++i) if(!rp[i].w) {
  73     rp[i].x=x;rp[i].y=y;rp[i].w=r-x+1;rp[i].h=b-y+1;
  74     return;
  75   }
  76 }
  77
  78 void RD_rect(short x,short w,short y,short h) {
  79   if(x>sr) return;
  80   if(x+w<=sl) return;
  81   if(y>sb) return;
  82   if(y+h<=st) return;
  83   w+=x-1;h+=y-1;
  84   if(x<sl) x=sl;
  85   if(y<st) y=st;
  86   if(w>sr) w=sr;
  87   if(h>sb) h=sb;
  88   add(x,w,y,h);
  89 }
  90
  91 void RD_spr(short x,short y,vgaimg *v) {
  92   RD_rect(x-v->sx,v->w,y-v->sy,v->h);
  93 }
  94
  95 void RD_spr2(short x,short y,vgaimg *v) {
  96   RD_rect(x-v->w+v->sx,v->w,y-v->sy,v->h);
  97 }
  98
  99 void RD_end(void) {
 100   int i;
 101
 102   V_setscr(scrbuf);
 103   rp=rt+MAXRECT;
 104   for(i=0;i<MAXRECT;++i) if(rt[i].w) {
 105     add(rt[i].x,rt[i].x+rt[i].w-1,rt[i].y,rt[i].y+rt[i].h-1);
 106   }
 107   for(i=0;i<MAXRECT;++i) if(rp[i].w) {
 108     scrx=rp[i].x;scrw=rp[i].w;scry=rp[i].y;scrh=rp[i].h;
 109     fn();
 110   }
 111   for(i=0;i<MAXRECT;++i) if(rp[i].w) {
 112     V_copytoscr(rp[i].x,rp[i].w,rp[i].y,rp[i].h);
 113   }
 114   memcpy(rp,rt,MAXRECT*sizeof(rect));
 115   memset(rt,0,MAXRECT*sizeof(rect));
 116 }
 117 */