Free Hero Mesh

        case OP_MISC4: define_user_flags(0x1000,0x101F); break;
        case OP_MISC5: define_user_flags(0x1020,0x103F); break;
        case OP_MISC6: define_user_flags(0x1040,0x105F); break;
        case OP_MISC7: define_user_flags(0x1060,0x107F); break;
        case OP_COLLISIONLAYERS: define_user_flags(0x1080,0x1087); break;
        case OP_CODEPAGE:
          nxttok();
          if(tokent!=TF_INT || tokenv<1 || tokenv>65535) ParseError("Number from 1 to 65535 expected\n");
          set_code_page(tokenv);
          nxttok();
          if(tokent!=TF_CLOSE) ParseError("Expected close parenthesis\n");
          break;
        case OP_ORDER:
          if(norders) ParseError("Extra (Order) block\n");
          parse_order_block();

(Background <number> [<number>])
  Set the background colour, from 0 to 255. The default value is 1. You
  can optionally specify a second number, which is the background colour
  for the inventory; if not specified, uses the same colour for both.

(CodePage <number>)
  Define the code page, from 1 to 65535. If not specified, then the
  default code page is used.

(Control <definitions...>)
  Define the control class. The format is the same like other class
  definitions, except that Image and Abstract are not allowed. An
  object of this class is automatically created when initializing the
  level, at X and Y coordinates both zero, and cannot otherwise be

=== Code page numbers ===

Code page numbers are assigned according to the following:

* Code page numbers are 16-bit numbers. Numbers 0, 65534, and 65535 are
not used; they are reserved for internal use of the software. (TODO:
Maybe this should be changed to 23-bit code page numbers that I will
maintain a list of. The below will still apply for code page numbers
that fit in 16-bits, though.)

* Mainly, IBM code page numbers are used.

* If there is something from Microsoft or FreeDOS that does not already
have a IBM code page number and does not conflict with IBM assignments,
then they may also be used.

* If a Microsoft code page extends a IBM code page and is otherwise 100%
backward compatible with it, and ahs the same number as the corresponding
IBM code page, then the extensions added by Microsoft will also apply to
that code page (only).

Note that not all of the code page numbers according to the above are
actually used in Free Hero Mesh; Free Hero Mesh only uses ASCII-based
code pages with 8-bit characters (although the implementation may be
improved in future to allow multibyte code pages, but currently it
doesn't). The full set of code page numbers may still be useful for
other applications, though.

(Even if multibyte code pages are implemented in future (as well as the
possibility of different font sizes than 8x8, and for narrow/wide
characters), Shift-JIS is not suitable for Free Hero Mesh, because Free
Hero Mesh uses a backslash for string escaping and a multibyte character
in Shift-JIS can contain the ASCII code for a backslash. However, EUC-JP
may be suitable.)

#define read_userstate(a,b,c) read_lump_or_userstate(a,b,c,1)

// == picture ==

extern SDL_Surface*screen;
extern Uint16 picture_size;
extern int left_margin;


void init_palette(void);
void init_screen(void);
void load_pictures(void);
void set_code_page(Uint16 n);

// Use only when screen is unlocked
void draw_picture(int x,int y,Uint16 img);
void draw_cell(int x,int y);

// Use only when screen is locked
void draw_text(int x,int y,const unsigned char*t,int bg,int fg);

#include "heromesh.h"
#include "cursorshapes.h"
#include "keyicons.xbm"

SDL_Surface*screen;
Uint16 picture_size;
int left_margin;


static SDL_Surface*picts;
static Uint8*curpic;
static const unsigned char*fontdata;

static const char default_palette[]=
  "C020FF "

    SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY,SDL_DEFAULT_REPEAT_INTERVAL);
  }
  SDL_EnableUNICODE(1);
  optionquery[1]=Q_margin;
  left_margin=strtol(xrm_get_resource(resourcedb,optionquery,optionquery,2)?:"65",0,10);
}

void set_code_page(Uint16 n) {
  int c,i,j,s;
  const char*v;
  unsigned char*d;
  Uint8 b[32];
  FILE*fp;
  if(!n) return;
  if(n==367) n=437;

      goto done;
    }
    if(!c) break;
    if(!s) {
      if(c<'0' || c>'9') s=1;
      else if(c=='0' && !i) s=1;
      else i=10*i+c-'0';
      if(i>65535) s=1;
    }
  }
  if(s || i!=n) goto skip;
  i=fgetc(fp)<<16;
  i|=fgetc(fp)<<24;
  i|=fgetc(fp)<<0;
  i|=fgetc(fp)<<8;

  i=fgetc(fp)<<16;
  i|=fgetc(fp)<<24;
  i|=fgetc(fp)<<0;
  i|=fgetc(fp)<<8;
  fseek(fp,i,SEEK_CUR);
  goto name;
  done:

  fclose(fp);
}

// Widgets

static void draw_scrollbar(int*cur,int page,int max,int x0,int y0,int x1,int y1) {
  Uint8*pix=screen->pixels;