Free Hero Mesh

    n--;
    if(t==2) c=fgetc(fp);
    if(t==3) c=p[-pic->size];
    *p++=c;
  }
}

static void load_rotate(Picture*pic) {
  int x,y;
  int m=pic->meth;
  int s=pic->size;
  Uint8*d=pic->data+s;
  static Uint8*buf;
  Uint8*p;
  if(!buf) {
    buf=malloc(255*255);
    if(!buf) fatal("Allocation failed\n");
  }
  p=buf;
  for(y=0;y<s;y++) for(x=0;x<s;x++) {
    if(m&1) x=s-x-1;
    if(m&2) y=s-y-1;
    *p++=d[m&4?x*s+y:y*s+x];
    if(m&1) x=s-x-1;
    if(m&2) y=s-y-1;
  }
  memcpy(d,buf,s*s);
}

static void out_run(FILE*fp,int ch,int am,const Uint8*d,int le) {
  int n=am%85?:85;
  fputc(ch+n-1,fp);
  if(le) fwrite(d,1,le<n?le:n,fp);
  if(ch) d+=n,le-=n;
  while(am-=n) {
    n=am>7225?7225:am;
    fputc(ch+n/85-1,fp);
    if(le>0) fwrite(d,1,le<n?le:n,fp);
    if(ch) d+=n,le-=n;
  }
}

static void compress_picture_1(FILE*fp,Picture*pic) {
  int ps=pic->size;
  int ms=ps*ps;
  const Uint8*d=pic->data+ps;
  int i=0;
  int ca,homo,hetero;
  while(i<ms) {
    ca=0;
    while(i+ca<ms && d[i+ca]==d[i+ca-ps]) ca++;
    homo=1;
    while(i+homo<ms && d[i+homo]==d[i]) homo++;
    hetero=1;
    while(i+hetero<ms) {
      if(d[i+hetero]==d[i+hetero-ps] && d[i+hetero+1]==d[i+hetero+1-ps]) break;
      if(d[i+hetero]==d[i+hetero+1] && i+hetero==ms-1) break;
      if(d[i+hetero]==d[i+hetero+1] && d[i+hetero]==d[i+hetero+2]) break;
      hetero++;
    }
    if(ca>=homo && (ca>=hetero || homo>1)) {
      out_run(fp,170,ca,0,0);
      i+=ca;
    } else if(homo>1) {
      out_run(fp,0,homo-1,d+i,1);
      i+=homo;
    } else {
      if(hetero>85) hetero=85;
      out_run(fp,85,hetero,d+i,hetero);
      i+=hetero;
    }
  }
}

static void compress_picture(FILE*out,Picture*pic) {
  int bm=15;
  int bs=pic->size*pic->size;
  FILE*fp=fmemopen(0,bs,"w");
  int i,j;
  if(!fp) fatal("Error with fmemopen");
  for(i=0;i<8;i++) {
    compress_picture_1(fp,pic);
    if(!ferror(fp)) {
      j=ftell(fp);
      if(j>0 && j<bs) bs=j,bm=i;
    }
    rewind(fp);
    pic->meth="\1\3\1\7\1\3\1\7"[i];
    load_rotate(pic);
  }
  pic->meth=bm;
  if(bm && bm!=15) load_rotate(pic);
  fclose(fp);
  if(bm==15) fwrite(pic->data+pic->size,pic->size,pic->size,out); else compress_picture_1(out,pic);
}

static void block_rotate(Uint8*d,Uint8 s,Uint8 w,Uint8 h,Uint8 m) {
  Uint8*b=malloc(w*h);
  Uint8*p=b;
  int x,y;
  if(!b) fatal("Allocation failed\n");
  if(w!=h && (m&4)) goto end;

}

static void edit_picture(sqlite3_int64 id) {
  sqlite3_stmt*st;
  Picture*pict[16]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
  char*name;
  const unsigned char*data;
  Uint8*buf=0;
  size_t size=0;
  FILE*fp;
  int i,n;
  if(i=sqlite3_prepare_v2(userdb,"SELECT SUBSTR(`NAME`,1,LENGTH(`NAME`)-4),`DATA` FROM `PICEDIT` WHERE `ID`=?1;",-1,&st,0)) {
    screen_message(sqlite3_errmsg(userdb));
    return;
  }
  sqlite3_bind_int64(st,1,id);
  i=sqlite3_step(st);
  if(i!=SQLITE_ROW) {

    *pict=malloc(sizeof(Picture)+(i+1)*i);
    if(!*pict) fatal("Allocation failed");
    pict[0]->size=i;
    memset(pict[0]->data,0,(i+1)*i);
  }
  edit_picture_1(pict,name);
  free(name);
  fp=open_memstream((char**)&buf,&size);
  if(!fp) fatal("Cannot open memory stream\n");
  for(i=n=0;i<16;i++) if(pict[i]) n++;
  fputc(n,fp);
  for(i=0;i<n;i++) fputc(pict[i]->size,fp);
  for(i=0;i<n>>1;i++) fputc(0,fp);
  for(i=0;i<n;i++) compress_picture(fp,pict[i]);
  fclose(fp);
  if(!buf || !size) fatal("Allocation failed\n");
  *buf|=pict[0]->meth<<4;
  for(i=1;i<n;i++) buf[n+1+((i-1)>>1)]|=pict[i]->meth<<(i&1?0:4);
  for(i=0;i<16;i++) free(pict[i]);
  if(i=sqlite3_prepare_v2(userdb,"UPDATE `PICEDIT` SET `DATA`=?2 WHERE ID=?1;",-1,&st,0)) {
    screen_message(sqlite3_errmsg(userdb));
    free(buf);
    return;
  }
  sqlite3_bind_int64(st,1,id);
  sqlite3_bind_blob(st,2,buf,size,free);
  i=sqlite3_step(st);
  if(i!=SQLITE_DONE) screen_message(sqlite3_errmsg(userdb));
  sqlite3_finalize(st);
}

static int add_picture(int t) {
  sqlite3_stmt*st;
  const char*s=screen_prompt("Enter name of new picture:");
  int i;
  if(!s || !*s) return 0;

=== Main menu ===

The main menu displays the list of the names of all pictures. This list is
sorted by name.

You can push escape to quit and save, or shift+escape quits without saving.

The F1 key adds a picture.

The F2 key deletes a picture by name.

The F3 key allows entering a name of a picture to edit.


=== Drawing ===

The following keyboard commands are available: