Free Hero Mesh

    ColorFilter color;
    OverlayFilter overlay;
    ShiftFilter shift;
  };
} Filter;

typedef struct {
  union {
    char basename[64];
    struct {
      // This nested struct is only used for multidependent pictures.
      char name[10];
      Uint16 size;
    };
  };
  Filter filters[64];
  Uint8 nfilters;
} DependentPicture;

typedef struct {
  char basename[64];
} BaseName;

typedef struct {
  union {
    struct {
      Uint8 nbases;
      Uint8 nchains[3];
    };
    Uint8 nitems[4];
  };
  BaseName bases[63];
  DependentPicture chains[3*63];
} MultiDependent;

typedef struct {
  sqlite3_vtab_cursor super;
  int pos;
} Cursor;

static Uint8 cur_type;
static Uint8 gsizes[16];

static sqlite3_int64 ask_picture_id(const char*t) {
  sqlite3_stmt*st;
  const char*r=screen_prompt(t);
  int i;
  sqlite3_int64 id=0;
  if(!r || !*r) return 0;
  i=sqlite3_prepare_v2(userdb,"SELECT `ID`, `TYPE` FROM `PICEDIT` WHERE `NAME`=?1||'.IMG' OR `NAME`=?1||'.DEP' OR (SUBSTR(?1,1,1)='+' AND `NAME`=SUBSTR(?1,2)||'.MUL');",-1,&st,0);
  if(i) {
    screen_message(sqlite3_errmsg(userdb));
    return 0;
  }
  sqlite3_bind_text(st,1,r,-1,0);
  i=sqlite3_step(st);
  if(i==SQLITE_ROW) id=sqlite3_column_int64(st,0),cur_type=sqlite3_column_int(st,1);

        break;
      case SDL_VIDEOEXPOSE:
        goto redraw;
    }
  }
}

static void load_dependent_picture(const Uint8*data,int size,DependentPicture*dp,int mode) {
  FILE*fp;
  int i,j,k;
  if(!mode) memset(dp,0,sizeof(DependentPicture));
  if(!size) {
    if(mode) return;
    const char*s=screen_prompt("Name of base picture:");
    if(s) strncpy(dp->basename,s,63);
    return;
  }
  fp=fmemopen((Uint8*)data,size,"r");
  if(!fp) fatal("Error with fmemopen\n");
  i=0;
  if(!mode) for(;;) {
    j=fgetc(fp);
    if(j<32) {
      if(j>0) ungetc(j,fp);
      break;
    }
    if(i<63) dp->basename[i++]=j;
  }

        dp->filters[i].shift.nshift=k+1;
        break;
    }
  }
  fclose(fp);
}

static void save_dependent_picture(FILE*fp,DependentPicture*dp,int mode) {
  int i,j;
  if(!mode) fwrite(dp->basename,1,strlen(dp->basename)+(dp->filters[0].code<32?0:1),fp);
  for(i=0;i<dp->nfilters;i++) {
    fputc(dp->filters[i].code,fp);
    switch(dp->filters[i].code) {
      case 8 ... 10:
        fputc(dp->filters[i].color.ncolors,fp);
        fwrite(dp->filters[i].color.colors,1,dp->filters[i].color.ncolors,fp);
        break;

  SDL_Rect r;
  SDL_Event ev;
  set_cursor(XC_arrow);
  redraw:
  r.x=r.y=0; r.w=screen->w; r.h=screen->h;
  SDL_LockSurface(screen);
  SDL_FillRect(screen,&r,0xF0);
  if(name) {
    draw_text(0,0,"Dependent Image:",0xF0,0xF7);
    draw_text(136,0,name,0xF0,0xF5);


    draw_text(16,16,"Base:",0xF0,0xF7);
    draw_text(64,16,dp->basename,0xF0,0xFE);
  } else {
    draw_text(0,0,"Filter Chain",0xF0,0xF7);
    draw_text(16,16,"<Base>",0xF0,0xF8);
  }
  draw_text(0,8,"<ESC> Exit  <\x18/\x19> Cursor  <SP> Edit  <INS> Insert  <DEL> Delete",0xF0,0xFB);
  draw_text(0,16,c<0?"\x1A":"\xFA",0xF0,c<0?0xFA:0xF2);
  for(i=0,y=24;i<dp->nfilters;i++) {
    draw_text(0,y,c==i?"\x1A":"\xFA",0xF0,c==i?0xFA:0xF2);
    switch(j=dp->filters[i].code) {
      case 0 ... 7:
        draw_text(16,y,txt[j],0xF0,0xF7);
        y+=8;
        break;

          case SDLK_ESCAPE: return;
          case SDLK_UP: case SDLK_KP8: case SDLK_a: case SDLK_k: if(c>=0) --c; break;
          case SDLK_DOWN: case SDLK_KP2: case SDLK_z: case SDLK_j: ++c; break;
          case SDLK_INSERT: case SDLK_KP0:
            if(add_filter(dp,txt,c)) // maybe fallthrough
          case SDLK_SPACE:
            if(c==-1) {
              if(!name) break;
              s=screen_prompt("Name of base picture:");
              if(s && *s) strncpy(dp->basename,s,63);
            } else if(c<dp->nfilters) {
              switch(dp->filters[c].code) {
                case 8 ... 10:
                  edit_color_filter(&dp->filters[c].color);
                  break;

        }
        goto redraw;
      case SDL_VIDEOEXPOSE:
        goto redraw;
    }
  }
}

static void load_multidependent(const Uint8*data,int size,MultiDependent*mp) {
  Uint32 at=4;
  int i,j,k;
  memset(mp,0,sizeof(MultiDependent));
  if(size<4) return;
  memcpy(mp->nitems,data,4);
  for(i=0;i<(mp->nbases&63);i++) {
    for(k=0;k<63 && at<size && data[at];k++) mp->bases[i].basename[k]=data[at++];
    at++;
  }
  for(j=0;j<3;j++) for(i=0;i<(mp->nchains[j]&63) && at<size-2;i++) {
    k=data[at++]; k|=data[at++]<<8;
    mp->chains[j*63+i].size=k&0x07FF;
    mp->chains[j*63+i].name[0]="\x00-_."[k>>14];
    k>>=11;
    if(at+(k&7)>size) break;
    memcpy(mp->chains[j*63+i].name+(k&~7?1:0),data+at,k&7);
    at+=k&7;
  }
  for(j=0;j<3;j++) for(i=0;i<(mp->nchains[j]&63) && at+mp->chains[j*63+i].size<=size;i++) {
    load_dependent_picture(data+at,mp->chains[j*63+i].size,mp->chains+j*63+i,1);
    at+=mp->chains[j*63+i].size;
  }
}

static void save_multidependent(FILE*fp,MultiDependent*mp) {
  Uint8*buf=0;
  size_t size=0;
  FILE*f=open_memstream((char**)&buf,&size);
  Uint32 at;
  int i,j,k,c;
  if(!f) fatal("Cannot open memory stream\n");
  fwrite(mp->nitems,1,4,fp);
  for(i=0;i<(mp->nbases&63);i++) fwrite(mp->bases[i].basename,1,strlen(mp->bases[i].basename)+1,fp);
  for(j=0;j<3;j++) for(i=0;i<(mp->nchains[j]&63);i++) {
    at=ftell(f);
    save_dependent_picture(f,mp->chains+j*63+i,1);
    //TODO: This should check if it is too long, but unfortunately it does not do that.
    k=(ftell(f)-at)&0x07FF;
    c=mp->chains[j*63+i].name[0];
    if(c=='-') k|=0x4000;
    if(c=='_') k|=0x8000;
    if(c=='.') k|=0xC000;
    k|=strlen(mp->chains[j*63+i].name+(k>>14?1:0))<<11;
    fputc(k,fp); fputc(k>>8,fp);
    if((k>>11)&7) fwrite(mp->chains[j*63+i].name+(k>>14?1:0),1,(k>>11)&7,fp);
  }
  fputc(0,f);
  fclose(f);
  if(!buf || !size) fatal("Allocation failed\n");
  if(size) fwrite(buf,1,size-1,fp);
  free(buf);
}

static void edit_multidependent(MultiDependent*mp,const char*name) {
  const char*s;
  char row=0;
  char col=0;
  int i,j;
  SDL_Rect r;
  SDL_Event ev;
  set_cursor(XC_arrow);
  redraw:
  r.x=r.y=0; r.w=screen->w; r.h=screen->h;
  SDL_LockSurface(screen);
  SDL_FillRect(screen,&r,0xF0);
  draw_text(0,0,"Multidependent:",0xF0,0xF7);
  draw_text(136,0,name,0xF0,0xF5);
  draw_text(0,8,"<ESC> Exit  <\x18/\x19/\x1A/\x1B> Cursor  <SP> Edit  <TAB> Name  <BKSP> Toggle Null  <INS> Add  <DEL> Delete",0xF0,0xFB);
  draw_text(4,20,"BASE ",col==0?0xF2:0xF0,0xFE);
  if(mp->nbases&0x80) draw_text(4,28,"<Null>",0xF0,0xF7);
  draw_text(4+8*64,20,"I   ",col==1?0xF2:0xF0,0xFE);
  if(mp->nchains[0]&0x80) draw_text(4+8*64,28,"<Null>",0xF0,0xF7);
  draw_text(4+8*74,20,"II  ",col==2?0xF2:0xF0,0xFE);
  if(mp->nchains[1]&0x80) draw_text(4+8*74,28,"<Null>",0xF0,0xF7);
  draw_text(4+8*84,20,"III ",col==3?0xF2:0xF0,0xFE);
  if(mp->nchains[2]&0x80) draw_text(4+8*84,28,"<Null>",0xF0,0xF7);
  if(row>=(mp->nitems[col]&63)) row=(mp->nitems[col]&63?:1)-1;
  for(i=0;i<(mp->nbases&63);i++) draw_text(4,8*i+36,mp->bases[i].basename,(col==0 && row==i)?0xF1:0xF0,0xF7);
  for(j=0;j<3;j++) for(i=0;i<(mp->nchains[j]&63);i++) draw_text(4+8*(10*j+64),8*i+36,mp->chains[j*63+i].name,(col==j+1 && row==i)?0xF1:0xF0,0xF7);
  SDL_UnlockSurface(screen);
  SDL_Flip(screen);
  while(SDL_WaitEvent(&ev)) {
    switch(ev.type) {
      case SDL_QUIT:
        exit(0);
        break;
      case SDL_KEYDOWN:
        switch(ev.key.keysym.sym) {
          case SDLK_ESCAPE: case SDLK_q: return;
          case SDLK_BACKSPACE: case SDLK_t: mp->nitems[col]^=0x80; break;
          case SDLK_LEFT: case SDLK_KP4: case SDLK_h: if(col) --col; break;
          case SDLK_RIGHT: case SDLK_KP6: case SDLK_l: if(col<3) ++col; break;
          case SDLK_UP: case SDLK_KP8: case SDLK_k: if(row) --row; break;
          case SDLK_DOWN: case SDLK_KP2: case SDLK_j: ++row; break;
          case SDLK_HOME: case SDLK_KP7: row=0; break;
          case SDLK_END: case SDLK_KP1: row=64; break;
          case SDLK_INSERT: case SDLK_KP0: case SDLK_a:
            if((mp->nitems[col]&63)==63) break;
            row=mp->nitems[col]&63;
            s=screen_prompt(col?"Add filter chain:":"Add base item:");
            if(!s || !*s) break;
            if(col) {
              strncpy(mp->chains[(col-1)*63+row].name,s,8);
              if(*s!='.' && *s!='_' && *s!='-') mp->chains[(col-1)*63+row].name[8]=0;
              mp->chains[(col-1)*63+row].nfilters=0;
              ++mp->nitems[col];
              goto edit;
            } else {
              strncpy(mp->bases[row].basename,s,63);
              ++mp->nbases;
            }
            break;
          case SDLK_SPACE: case SDLK_e: edit:
            if(!mp->nitems[col]) break;
            if(!col) goto rename;
            edit_dependent_picture(mp->chains+(col-1)*63+row,0);
            break;
          case SDLK_DELETE: case SDLK_KP_PERIOD: case SDLK_d:
            if(!mp->nitems[col]) break;
            --mp->nitems[col];
            if(col) {
              for(i=row;i<mp->nitems[col];i++) mp->chains[(col-1)*63+i]=mp->chains[(col-1)*63+i+1];
            } else {
              for(i=row;i<mp->nbases;i++) mp->bases[i]=mp->bases[i+1];
            }
            break;
          case SDLK_TAB: case SDLK_n: rename:
            if(!mp->nitems[col]) break;
            s=screen_prompt("Rename:");
            if(!s || !*s) break;
            if(col) {
              strncpy(mp->chains[(col-1)*63+row].name,s,8);
              if(*s!='.' && *s!='_' && *s!='-') mp->chains[(col-1)*63+row].name[8]=0;
              mp->chains[(col-1)*63+row].nfilters=0;
            } else {
              strncpy(mp->bases[row].basename,s,63);
            }
            break;
        }
        goto redraw;
      case SDL_VIDEOEXPOSE:
        goto redraw;
    }
  }
}

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};
  DependentPicture*dpict;
  MultiDependent*mpict;
  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`,`TYPE` FROM `PICEDIT` WHERE `ID`=?1;",-1,&st,0)) {

    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]);
  } else if(i==2) {
    dpict=malloc(sizeof(DependentPicture));
    if(!dpict) fatal("Allocation failed\n");
    load_dependent_picture(data,n,dpict,0);
    fp=open_memstream((char**)&buf,&size);
    if(!fp) fatal("Cannot open memory stream\n");
    edit_dependent_picture(dpict,name);
    save_dependent_picture(fp,dpict,0);
    free(dpict);
    fclose(fp);
    if(!buf || !size) fatal("Allocation failed\n");
  } else if(i==3) {
    mpict=malloc(sizeof(MultiDependent));
    if(!mpict) fatal("Allocation failed\n");
    load_multidependent(data,n,mpict);
    fp=open_memstream((char**)&buf,&size);
    if(!fp) fatal("Cannot open memory stream\n");
    edit_multidependent(mpict,name);
    save_multidependent(fp,mpict);
    free(dpict);
    fclose(fp);
    if(!buf || !size) fatal("Allocation failed\n");
  }
  free(name);
  if(i=sqlite3_prepare_v2(userdb,"UPDATE `PICEDIT` SET `DATA`=?2 WHERE ID=?1;",-1,&st,0)) {
    screen_message(sqlite3_errmsg(userdb));