src/redraw.c

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