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Overview
Comment:Implement loading dependent pictures.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 55e7980567a45c03c003216bebab8b68c4f4b6ba
User & Date: user on 2021-04-15 03:37:26
Other Links: manifest | tags
Context
2021-04-16
00:19
Update the TODO file. check-in: fb7252b349 user: user tags: trunk
2021-04-15
03:37
Implement loading dependent pictures. check-in: 55e7980567 user: user tags: trunk
2021-04-14
21:51
Add the missing -lm flag for linking check-in: 7355156dce user: user tags: trunk
Changes
Hide Diffs Side-by-Side Diffs Ignore Whitespace Patch

Modified picedit.c from [9f72395624] to [9a5c536613].

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        break;
      case 12 ... 15:
        for(k=0;k<64;k++) {
          dp->filters[i].shift.shift[k]=(j=fgetc(fp))&127;
          dp->filters[i].shift.size[k]=fgetc(fp);
          if(j&128) break;
        }
        dp->filters[i].shift.nshift=k;
        dp->filters[i].shift.nshift=k+1;
        break;
    }
  }
  fclose(fp);
}

static void save_dependent_picture(FILE*fp,DependentPicture*dp) {
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Modified picture.c from [32631e0ed2] to [4b33185177].

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        if(meth&2) i=size-i-1;
      }
      pix+=pitch-picture_size;
    }
  }
  SDL_UnlockSurface(picts);
}

static void pic_shift_right(SDL_Rect*r,int sh) {
  Uint8*p;
  int y;
  char buf[256];
  sh%=r->w;
  if(!sh) return;
  SDL_LockSurface(picts);
  p=picts->pixels+r->y*picts->pitch+r->x;
  for(y=0;y<r->h;y++) {
    memcpy(buf,p,r->w);
    memcpy(p,buf+r->w-sh,sh);
    memcpy(p+sh,buf,r->w-sh);
    p+=picts->pitch;
  }
  SDL_UnlockSurface(picts);
}

static void pic_shift_down(SDL_Rect*r,int sh) {
  Uint8*p;
  int y;
  char b1[256];
  char b2[256];
  sh%=r->h;
  SDL_LockSurface(picts);
  // This implementation is probably inefficient.
  while(sh--) {
    p=picts->pixels+r->y*picts->pitch+r->x;
    memcpy(b1,p+picts->pitch*(r->h-1),r->w);
    for(y=0;y<r->h;y++) {
      memcpy(b2,p,r->w);
      memcpy(p,b1,r->w);
      p+=picts->pitch;
      memcpy(b1,b2,r->w);
    }
  }
  SDL_UnlockSurface(picts);
}

static void pic_orientation(SDL_Rect*r,Uint8 m) {
  Uint8*d=malloc(r->w*r->h);
  Uint8*p;
  Uint8*q;
  int i,j;
  if(!d) fatal("Allocation failed\n");
  SDL_LockSurface(picts);
  p=picts->pixels+r->y*picts->pitch+r->x;
  q=d;
  for(i=0;i<r->h;i++) {
    for(j=0;j<r->w;j++) {
      if(m&1) j=r->w-j-1;
      if(m&2) i=r->h-i-1;
      *q++=p[m&4?j*picts->pitch+i:i*picts->pitch+j];
      if(m&1) j=r->w-j-1;
      if(m&2) i=r->h-i-1;
    }
  }
  q=d;
  for(i=0;i<r->h;i++) {
    memcpy(p,q,r->w);
    p+=picts->pitch;
    q+=r->w;
  }
  SDL_UnlockSurface(picts);
  free(d);
}

static void load_dependent_picture(FILE*fp,Uint16 img,int alt) {
  SDL_Rect src={0,0,picture_size,picture_size};
  SDL_Rect dst={(img&15)*picture_size,(img>>4)*picture_size,picture_size,picture_size};
  sqlite3_stmt*st;
  Sint32 sz;
  int c,i,x,y;
  char nam[128];
  Uint8 buf[512];
  Uint8*p;
  sz=fgetc(fp)<<16;
  sz|=fgetc(fp)<<24;
  sz|=fgetc(fp);
  sz|=fgetc(fp)<<8;
  if(sqlite3_prepare_v2(userdb,"SELECT `ID` FROM `PICTURES` WHERE `NAME` = ?1 AND NOT `DEPENDENT`;",-1,&st,0))
   fatal("Unable to prepare SQL statement while loading pictures: %s\n",sqlite3_errmsg(userdb));
  i=0;
  while(sz) {
    c=fgetc(fp);
    if(c<32) break;
    if(i<127) nam[i++]=c;
    sz--;
  }
  if(sz) ungetc(c,fp);
  sqlite3_bind_text(st,1,nam,i,0);
  i=sqlite3_step(st);
  if(i==SQLITE_DONE) {
    fprintf(stderr,"Cannot find base picture for a dependent picture; ignoring\n");
    sqlite3_finalize(st);
    return;
  } else if(i!=SQLITE_ROW) {
    fatal("SQL error (%d): %s\n",i,sqlite3_errmsg(userdb));
  }
  i=sqlite3_column_int(st,0);
  sqlite3_reset(st);
  src.x=(i&15)*picture_size;
  src.y=(i>>4)*picture_size;
  SDL_SetColorKey(picts,0,0);
  SDL_BlitSurface(picts,&src,picts,&dst);
  while(sz-->0) switch(c=fgetc(fp)) {
    case 0 ... 7: // Flip/rotate
      pic_orientation(&dst,c);
      break;
    case 8: // *->* *->* *->*
      c=fgetc(fp);
      sz-=c+1;
      fread(buf,1,c&255,fp);
      SDL_LockSurface(picts);
      p=picts->pixels+((img&15)+picts->pitch*(img>>4))*picture_size;
      for(y=0;y<picture_size;y++) {
        for(x=0;x<picture_size;x++) {
          for(i=0;i<c;i+=2) {
            if(p[x]==buf[i]) {
              p[x]=buf[i+1];
              break;
            }
          }
        }
        p+=picts->pitch;
      }
      SDL_UnlockSurface(picts);
      break;
    case 9: // *->*->*->*->*
      c=fgetc(fp);
      sz-=c+1;
      fread(buf,1,c&255,fp);
      SDL_LockSurface(picts);
      p=picts->pixels+((img&15)+picts->pitch*(img>>4))*picture_size;
      for(y=0;y<picture_size;y++) {
        for(x=0;x<picture_size;x++) {
          for(i=0;i<c-1;i++) {
            if(p[x]==buf[i]) {
              p[x]=buf[i+1];
              break;
            }
          }
        }
        p+=picts->pitch;
      }
      SDL_UnlockSurface(picts);
      break;
    case 10: // *<->* *<->* *<->*
      c=fgetc(fp);
      sz-=c+1;
      fread(buf,1,c&255,fp);
      SDL_LockSurface(picts);
      p=picts->pixels+((img&15)+picts->pitch*(img>>4))*picture_size;
      for(y=0;y<picture_size;y++) {
        for(x=0;x<picture_size;x++) {
          for(i=0;i<c;i+=2) {
            if(p[x]==buf[i]) {
              p[x]=buf[i+1];
              break;
            } else if(p[x]==buf[i+1]) {
              p[x]=buf[i];
              break;
            }
          }
        }
        p+=picts->pitch;
      }
      SDL_UnlockSurface(picts);
      break;
  //TODO
    case 11: // Overlay
      SDL_SetColorKey(picts,SDL_SRCCOLORKEY,0);
      i=0;
      while(sz>0) {
        c=fgetc(fp);
        if(c<32) break;
        if(i<127) nam[i++]=c;
        sz--;
      }
      if(sz) ungetc(c,fp);
      sqlite3_bind_text(st,1,nam,i,0);
      i=sqlite3_step(st);
      if(i==SQLITE_DONE) {
        fprintf(stderr,"Cannot find overlay for a dependent picture; ignoring\n");
        break;
      } else if(i!=SQLITE_ROW) {
        fatal("SQL error (%d): %s\n",i,sqlite3_errmsg(userdb));
      }
      i=sqlite3_column_int(st,0);
      sqlite3_reset(st);
      src.x=(i&15)*picture_size;
      src.y=(i>>4)*picture_size;
      SDL_BlitSurface(picts,&src,picts,&dst);
      break;
    case 12 ... 15: // Shift (up/down/right/left)
      while(sz>0) {
        x=fgetc(fp);
        y=fgetc(fp);
        sz-=2;
        if(y && !(picture_size%y)) {
          if(c==12) pic_shift_down(&dst,picture_size-((x&127)*picture_size)/y);
          if(c==13) pic_shift_down(&dst,((x&127)*picture_size)/y);
          if(c==14) pic_shift_right(&dst,((x&127)*picture_size)/y);
          if(c==15) pic_shift_right(&dst,picture_size-((x&127)*picture_size)/y);
          break;
        }
        if(x&128) break;
      }
      while(sz>0 && x<128) {
        x=fgetc(fp);
        fgetc(fp);
        sz-=2;
      }
      break;
    default:
      fprintf(stderr,"Unrecognized command in dependent picture (%d)\n",c);
      goto done;
  }
  if(sz<0) fprintf(stderr,"Lump size of dependent picture is too short\n");
  done: sqlite3_finalize(st);
}

void load_pictures(void) {
  sqlite3_stmt*st=0;
  FILE*fp;
  Uint8 wantsize[32];
  Uint8 nwantsize=0;
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