#ifndef NO_WX

#include <wx/wx.h>
#include <wx/dcgraph.h>
#include <wx/fontutil.h>
#include <wx/bitmap.h>
#include <wx/image.h>
#include <wx/string.h>
#include <cstring>

#endif

#include "gks.h"
#include "gkscore.h"

#ifdef __cplusplus
extern "C" {
#endif

#ifdef _WIN32

#include <windows.h>
#ifndef DLLEXPORT
#define DLLEXPORT __declspec(dllexport)
#endif

#endif

DLLEXPORT void gks_wxplugin(int fctid, int dx, int dy, int dimx, int *i_arr, int len_f_arr_1, double *f_arr_1,
                            int len_f_arr_2, double *f_arr_2, int len_c_arr, char *c_arr, void **ptr);

#ifdef __cplusplus
}
#endif

#ifndef GKS_UNUSED
#define GKS_UNUSED(x) (void)(x)
#endif

#ifndef NO_WX

#define TIMER_INTERVAL 100

#define PATTERNS 120
#define MAX_TNR 9

#define MAX_POINTS 2048
#define MAX_SELECTIONS 100

#define HATCH_STYLE 108

#define MWIDTH 0.254
#define MHEIGHT 0.1905
#define WIDTH 1024
#define HEIGHT 768

#define DrawBorder 0

#define RESOLVE(arg, type, nbytes) \
  arg = (type *)(s + sp);          \
  sp += nbytes

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

#define WC_to_NDC(xw, yw, tnr, xn, yn) \
  xn = a[tnr] * (xw) + b[tnr];         \
  yn = c[tnr] * (yw) + d[tnr]

#define WC_to_NDC_rel(xw, yw, tnr, xn, yn) \
  xn = a[tnr] * (xw);                      \
  yn = c[tnr] * (yw)

#define NDC_to_DC(xn, yn, xd, yd) \
  xd = (int)(p->a * (xn) + p->b); \
  yd = (int)(p->c * (yn) + p->d);

#define DC_to_NDC(xd, yd, xn, yn) \
  xn = ((xd)-p->b) / p->a;        \
  yn = ((yd)-p->d) / p->c;

#define CharXform(xrel, yrel, x, y)                  \
  x = cos(p->alpha) * (xrel)-sin(p->alpha) * (yrel); \
  y = sin(p->alpha) * (xrel) + cos(p->alpha) * (yrel);

#define nint(a) ((int)(a + 0.5))

#ifndef min
#define min(a, b) (((a) < (b)) ? (a) : (b))
#endif

static gks_state_list_t *gkss;

static double a[MAX_TNR], b[MAX_TNR], c[MAX_TNR], d[MAX_TNR];

typedef struct ws_state_list_t
{
  gks_display_list_t dl;
  wxPanel *widget;
#if defined(USE_WX_GCDC) && wxCHECK_VERSION(2, 9, 0)
  wxGCDC *pixmap;
#else
  wxMemoryDC *pixmap;
#endif
  int antialias;
  int state, wtype;
  int width, height;
  double a, b, c, d;
  double window[4], viewport[4];
  wxRect rect[MAX_TNR];
  wxColour rgb[MAX_COLOR];
  wxPoint *points;
  int npoints, max_points;
  wxFont *font;
  int family, capheight;
  double alpha, angle;
  wxBitmap *pattern[PATTERNS];
} ws_state_list;

static ws_state_list *p;

static const char *fonts[] = {"Times New Roman",    "Arial",          "Courier",     "Open Symbol", "Bookman Old Style",
                              "Century Schoolbook", "Century Gothic", "Book Antiqua"};

static double capheights[29] = {0.662, 0.660, 0.681, 0.662, 0.729, 0.729, 0.729, 0.729, 0.583, 0.583,
                                0.583, 0.583, 0.667, 0.681, 0.681, 0.681, 0.681, 0.722, 0.722, 0.722,
                                0.722, 0.739, 0.739, 0.739, 0.739, 0.694, 0.693, 0.683, 0.683};

static int map[32] = {22, 9,  5, 14, 18, 26, 13, 1, 24, 11, 7, 16, 20, 28, 13, 3,
                      23, 10, 6, 15, 19, 27, 13, 2, 25, 12, 8, 17, 21, 29, 13, 4};

static int symbol2utf[256] = {
    0,    1,    2,    3,    4,    5,    6,    7,    8,    9,    10,   11,   12,   13,    14,   15,   16,    17,   18,
    18,   20,   21,   22,   23,   24,   25,   26,   27,   28,   29,   30,   31,   32,    33,   8704, 35,    8707, 37,
    38,   8715, 40,   41,   42,   43,   44,   45,   46,   47,   48,   49,   50,   51,    52,   53,   54,    55,   56,
    57,   58,   59,   60,   61,   62,   63,   8773, 913,  914,  935,  916,  917,  934,   915,  919,  921,   977,  922,
    923,  924,  925,  927,  928,  920,  929,  931,  932,  933,  962,  937,  926,  936,   918,  91,   8756,  93,   8869,
    95,   8254, 945,  946,  967,  948,  949,  966,  947,  951,  953,  981,  954,  955,   956,  957,  959,   960,  952,
    961,  963,  964,  965,  982,  969,  958,  968,  950,  123,  124,  125,  126,  127,   128,  129,  130,   131,  132,
    133,  134,  135,  136,  137,  138,  139,  140,  141,  142,  143,  144,  145,  146,   147,  148,  149,   150,  151,
    152,  153,  154,  155,  156,  157,  158,  159,  160,  978,  8242, 8804, 8260, 8734,  402,  9827, 9830,  9829, 9824,
    8596, 8592, 8593, 8594, 8595, 176,  177,  8243, 8805, 215,  8733, 8706, 8226, 247,   8800, 8801, 8776,  8230, 9116,
    9135, 8629, 8501, 8465, 8476, 8472, 8855, 8853, 8709, 8745, 8746, 8835, 8839, 8836,  8834, 8838, 8712,  8713, 8736,
    8711, 174,  169,  8482, 8719, 8730, 183,  172,  8743, 8744, 8660, 8656, 8657, 8658,  8659, 9674, 12296, 174,  169,
    8482, 8721, 9115, 9116, 9117, 9121, 9116, 9123, 9127, 9128, 9129, 9116, 240,  12297, 8747, 9127, 9116,  9133, 9131,
    9130, 9120, 9124, 9130, 9126, 9131, 9132, 9133, 255};

static double xfac[4] = {0, 0, -0.5, -1};

static double yfac[6] = {0, -1.2, -1, -0.5, 0, 0.2};

static int predef_font[] = {1, 1, 1, -2, -3, -4};

static int predef_prec[] = {0, 1, 2, 2, 2, 2};

static int predef_ints[] = {0, 1, 3, 3, 3};

static int predef_styli[] = {1, 1, 1, 2, 3};

static void set_norm_xform(int tnr, double *wn, double *vp)
{
  int xp1, yp1, xp2, yp2;

  a[tnr] = (vp[1] - vp[0]) / (wn[1] - wn[0]);
  b[tnr] = vp[0] - wn[0] * a[tnr];
  c[tnr] = (vp[3] - vp[2]) / (wn[3] - wn[2]);
  d[tnr] = vp[2] - wn[2] * c[tnr];

  NDC_to_DC(vp[0], vp[3], xp1, yp1);
  NDC_to_DC(vp[1], vp[2], xp2, yp2);

  p->rect[tnr].SetLeftTop(wxPoint(xp1, yp1));
  p->rect[tnr].SetRightBottom(wxPoint(xp2, yp2));
}

static void init_norm_xform(void)
{
  int tnr;

  for (tnr = 0; tnr < MAX_TNR; tnr++) set_norm_xform(tnr, gkss->window[tnr], gkss->viewport[tnr]);
}

static void set_xform(void)
{
  p->a = (p->width - 1) / (p->window[1] - p->window[0]);
  p->b = -p->window[0] * p->a;
  p->c = (p->height - 1) / (p->window[2] - p->window[3]);
  p->d = p->height - 1 - p->window[2] * p->c;
}

static void seg_xform(double *x, double *y)
{
  double xx;

  xx = *x * gkss->mat[0][0] + *y * gkss->mat[0][1] + gkss->mat[2][0];
  *y = *x * gkss->mat[1][0] + *y * gkss->mat[1][1] + gkss->mat[2][1];
  *x = xx;
}

static void seg_xform_rel(double *x, double *y)
{
  double xx;

  xx = *x * gkss->mat[0][0] + *y * gkss->mat[0][1];
  *y = *x * gkss->mat[1][0] + *y * gkss->mat[1][1];
  *x = xx;
}

static void set_clip_rect(int tnr)
{
#if defined(USE_WX_GCDC) && wxCHECK_VERSION(2, 9, 0)
  destroy_clipping_region(*p->pixmap, p->antialias);
#else
  p->pixmap->DestroyClippingRegion();
#endif
  if (gkss->clip_tnr != 0 || gkss->clip == GKS_K_CLIP)
    p->pixmap->SetClippingRegion(p->rect[gkss->clip_tnr != 0 ? gkss->clip_tnr : tnr]);
  else
    p->pixmap->SetClippingRegion(p->rect[0]);
}

static void set_color_rep(int color, double red, double green, double blue)
{
  if (color >= 0 && color < MAX_COLOR) p->rgb[color].Set(nint(red * 255), nint(green * 255), nint(blue * 255));
}

static void init_colors(void)
{
  int color;
  double red, green, blue;

  for (color = 0; color < MAX_COLOR; color++)
    {
      gks_inq_rgb(color, &red, &green, &blue);
      set_color_rep(color, red, green, blue);
    }
}

static void set_color(int color)
{
  p->pixmap->SetPen(wxPen(p->rgb[color]));
  p->pixmap->SetBrush(wxBrush(p->rgb[color]));
}

static void draw_pixel(wxDC &dc, const wxPoint &point)
{
  // dc.DrawLine(point, point);
  dc.DrawPoint(point);
}

static void line_routine(int n, double *px, double *py, int linetype, int tnr)
{
  double x, y;
  int i, x0, y0, xi, yi, xim1, yim1;

  WC_to_NDC(px[0], py[0], tnr, x, y);
  seg_xform(&x, &y);
  NDC_to_DC(x, y, x0, y0);

  p->npoints = 0;
  p->points[p->npoints].x = x0;
  p->points[p->npoints].y = y0;
  ++p->npoints;

  xim1 = x0;
  yim1 = y0;
  for (i = 1; i < n; i++)
    {
      WC_to_NDC(px[i], py[i], tnr, x, y);
      seg_xform(&x, &y);
      NDC_to_DC(x, y, xi, yi);

      if (i == 1 || xi != xim1 || yi != yim1)
        {
          p->points[p->npoints].x = xi;
          p->points[p->npoints].y = yi;
          ++p->npoints;
          xim1 = xi;
          yim1 = yi;
        }
    }
  if (linetype == 0)
    {
      p->points[p->npoints].x = x0;
      p->points[p->npoints].y = y0;
      ++p->npoints;
    }

  if (p->npoints > 1)
    p->pixmap->DrawLines(p->npoints, p->points);
  else
    draw_pixel(*p->pixmap, *p->points);
  p->npoints = 0;
}

static void polyline(int n, double *px, double *py)
{
  int i, ln_type, ln_color;
  double ln_width;
  int width;
  static int gks_dash_list[10];
  wxDash tmp_dash_list[9];
  wxPen pen;
  double x, y;
  int ix, iy;

  if (n > p->max_points)
    {
      wxPoint *tmp = p->points;
      p->points = new wxPoint[n];
      memmove(p->points, tmp, p->max_points);
      p->max_points = n;
      delete[] tmp;
    }

  ln_type = gkss->asf[0] ? gkss->ltype : gkss->lindex;
  ln_width = gkss->asf[1] ? gkss->lwidth : 1;
  ln_color = gkss->asf[2] ? gkss->plcoli : 1;

  width = nint(ln_width);
  if (width < 1) width = 1;

  if (ln_color <= 0 || ln_color >= MAX_COLOR) ln_color = 1;

  gks_set_dev_xform(gkss, p->window, p->viewport);

  for (i = 0; i < n; ++i)
    {
      WC_to_NDC(px[i], py[i], gkss->cntnr, x, y);
      seg_xform(&x, &y);
      NDC_to_DC(x, y, ix, iy);
      p->points[p->npoints].x = ix;
      p->points[p->npoints].y = iy;
      ++p->npoints;
    }

  pen.SetColour(p->rgb[ln_color]);
  pen.SetWidth(width);

  if (ln_type > 1)
    {
      gks_get_dash_list(ln_type, 1, gks_dash_list);
      for (i = 0; i < gks_dash_list[0]; ++i)
        {
          tmp_dash_list[i] = wxDash(gks_dash_list[i + 1]);
        }

      pen.SetDashes(gks_dash_list[0], tmp_dash_list);
#if wxCHECK_VERSION(2, 9, 0)
      pen.SetStyle(wxPENSTYLE_USER_DASH);
#else
      pen.SetStyle(wxUSER_DASH);
#endif
    }
  else
    {
#if wxCHECK_VERSION(2, 9, 0)
      pen.SetStyle(wxPENSTYLE_SOLID);
#else
      pen.SetStyle(wxSOLID);
#endif
    }
  p->pixmap->SetPen(pen);

  if (p->npoints)
    {
      if (p->npoints > 1)
        p->pixmap->DrawLines(p->npoints, p->points);
      else
        draw_pixel(*p->pixmap, *p->points);
      p->npoints = 0;
    }
}

static void draw_marker(double xn, double yn, int mtype, double mscale, int mcolor)
{
  int r, d, x, y, i;
  int pc, op;
  double scale, xr, yr;
  wxBrush const *saveBrush;
  wxPoint *points;

#include "marker.h"

  if (gkss->version > 4) mscale *= (p->width + p->height) * 0.001;
  r = (int)(3 * mscale);
  d = 2 * r;
  scale = 0.01 * mscale / 3.0;

  xr = r;
  yr = 0;
  seg_xform_rel(&xr, &yr);
  r = nint(sqrt(xr * xr + yr * yr));

  NDC_to_DC(xn, yn, x, y);

  pc = 0;
  mtype = (d > 1) ? mtype + marker_off : marker_off + 1;

  do
    {
      op = marker[mtype][pc];
      switch (op)
        {

        case 1: /* point */
          draw_pixel(*p->pixmap, wxPoint(x, y));
          break;

        case 2: /* line */
          for (i = 0; i < 2; i++)
            {
              xr = scale * marker[mtype][pc + 2 * i + 1];
              yr = -scale * marker[mtype][pc + 2 * i + 2];
              seg_xform_rel(&xr, &yr);
              p->points[i].x = nint(x - xr);
              p->points[i].y = nint(y + yr);
            }
          p->pixmap->DrawLines(2, p->points);
          pc += 4;
          break;

        case 3: /* polygon */
        case 9: /* border polygon */
          points = new wxPoint[marker[mtype][pc + 1]];
          for (i = 0; i < marker[mtype][pc + 1]; i++)
            {
              xr = scale * marker[mtype][pc + 2 + 2 * i];
              yr = -scale * marker[mtype][pc + 3 + 2 * i];
              seg_xform_rel(&xr, &yr);
              points[i].x = nint(x - xr);
              points[i].y = nint(y + yr);
            }
          p->pixmap->DrawLines(marker[mtype][pc + 1], points);
          pc += 1 + 2 * marker[mtype][pc + 1];
          delete[] points;
          break;

        case 4: /* filled polygon */
        case 5: /* hollow polygon */
          points = new wxPoint[marker[mtype][pc + 1]];
          if (op == 5) set_color(0);
          for (i = 0; i < marker[mtype][pc + 1]; i++)
            {
              xr = scale * marker[mtype][pc + 2 + 2 * i];
              yr = -scale * marker[mtype][pc + 3 + 2 * i];
              seg_xform_rel(&xr, &yr);
              points[i].x = nint(x - xr);
              points[i].y = nint(y + yr);
            }
          p->pixmap->DrawPolygon(marker[mtype][pc + 1], points);
          pc += 1 + 2 * marker[mtype][pc + 1];
          if (op == 5) set_color(mcolor);
          delete[] points;
          break;

        case 6: /* arc */
          saveBrush = &p->pixmap->GetBrush();
#if wxCHECK_VERSION(2, 9, 0)
          p->pixmap->SetBrush(wxBrush(*wxBLACK, wxBRUSHSTYLE_TRANSPARENT));
#else
          p->pixmap->SetBrush(wxBrush(*wxBLACK, wxTRANSPARENT));
#endif
          p->pixmap->DrawEllipticArc(x - r, y - r, d, d, 0, 360);
          p->pixmap->SetBrush(*saveBrush);
          break;

        case 7: /* filled arc */
        case 8: /* hollow arc */
          if (op == 8) set_color(0);

          p->pixmap->DrawEllipticArc(x - r, y - r, d, d, 0, 360);

          if (op == 8) set_color(mcolor);
          break;
        }
      pc++;
    }
  while (op != 0);
}

static void marker_routine(int n, double *px, double *py, int mtype, double mscale, int mcolor)
{
  double x, y;
  double *clrt = gkss->viewport[gkss->cntnr];
  int i, draw;

  for (i = 0; i < n; i++)
    {
      WC_to_NDC(px[i], py[i], gkss->cntnr, x, y);
      seg_xform(&x, &y);

      if (gkss->clip == GKS_K_CLIP)
        draw = (x >= clrt[0] && x <= clrt[1] && y >= clrt[2] && y <= clrt[3]);
      else
        draw = 1;

      if (draw) draw_marker(x, y, mtype, mscale, mcolor);
    }
}

static void polymarker(int n, double *px, double *py)
{
  int mk_type, mk_color;
  double mk_size;

  mk_type = gkss->asf[3] ? gkss->mtype : gkss->mindex;
  mk_size = gkss->asf[4] ? gkss->mszsc : 1;
  mk_color = gkss->asf[5] ? gkss->pmcoli : 1;

#if wxCHECK_VERSION(2, 9, 0)
  p->pixmap->SetPen(wxPen(p->rgb[mk_color], 1, wxPENSTYLE_SOLID));
  p->pixmap->SetBrush(wxBrush(p->rgb[mk_color], wxBRUSHSTYLE_SOLID));
#else
  p->pixmap->SetPen(wxPen(p->rgb[mk_color], 1, wxSOLID));
  p->pixmap->SetBrush(wxBrush(p->rgb[mk_color], wxSOLID));
#endif
  marker_routine(n, px, py, mk_type, mk_size, mk_color);
}

static void text_routine(double x, double y, int nchars, char *chars)
{
  int i, ch, xstart, ystart, width, height, descent;
  double xrel, yrel, ax, ay;
#if wxUSE_UNICODE
  wxString s(wxT(""));
#else
  wxString s("");
#endif

  for (i = 0; i < nchars; i++)
    {
      ch = chars[i];
      if (ch < 0) ch += 256;
      if (p->family == 3) ch = symbol2utf[ch];
#if wxUSE_UNICODE
      s.append(static_cast<wchar_t>(ch));
#else
      s.append(static_cast<char>(ch));
#endif
    }

  NDC_to_DC(x, y, xstart, ystart);

  p->pixmap->GetTextExtent(s, &width, &height, &descent);

  xrel = width * xfac[gkss->txal[0]];
  yrel = p->capheight * yfac[gkss->txal[1]] + (height - descent);
  CharXform(xrel, yrel, ax, ay);

  xstart += (int)ax;
  ystart -= (int)ay;

  if (fabs(p->angle) > FEPS)
    {
      p->pixmap->DrawRotatedText(s, xstart, ystart, p->angle);
    }
  else
    {
      p->pixmap->DrawText(s, xstart, ystart);
    }
}

static void set_font(int font)
{
  double scale, ux, uy;
  int fontNum, size, bold, italic;
  double width, height, capheight;

  font = abs(font);
  if (font >= 101 && font <= 129)
    font -= 100;
  else if (font >= 1 && font <= 32)
    font = map[font - 1];
  else
    font = 9;

  WC_to_NDC_rel(gkss->chup[0], gkss->chup[1], gkss->cntnr, ux, uy);
  seg_xform_rel(&ux, &uy);

  p->alpha = -atan2(ux, uy);
  p->angle = p->alpha * 180 / M_PI;
  if (p->angle < 0) p->angle += 360;

  scale = sqrt(gkss->chup[0] * gkss->chup[0] + gkss->chup[1] * gkss->chup[1]);
  ux = gkss->chup[0] / scale * gkss->chh;
  uy = gkss->chup[1] / scale * gkss->chh;
  WC_to_NDC_rel(ux, uy, gkss->cntnr, ux, uy);

  width = 0;
  height = sqrt(ux * ux + uy * uy);
  seg_xform_rel(&width, &height);

  height = sqrt(width * width + height * height);
  capheight = nint(height * (fabs(p->c) + 1));
  p->capheight = nint(capheight);

  fontNum = font - 1;
  size = nint(p->capheight / capheights[fontNum]);
  if (font > 13) font += 3;
  p->family = (font - 1) / 4;
  bold = (font % 4 == 1 || font % 4 == 2) ? 0 : 1;
  italic = (font % 4 == 2 || font % 4 == 0);

  p->font->SetNativeFontInfoUserDesc(wxString(fonts[p->family], wxConvLibc));
  p->font->SetWeight(bold ? wxFONTWEIGHT_BOLD : wxFONTWEIGHT_NORMAL);
  p->font->SetStyle(italic ? wxFONTSTYLE_ITALIC : wxFONTSTYLE_NORMAL);
  p->font->SetPixelSize(wxSize(0, (int)(size)));

  p->pixmap->SetFont(*p->font);
}

static void fill_routine(int n, double *px, double *py, int tnr)
{
  int i;
  double x, y;
  int ix, iy;
  wxPoint *points;

  points = new wxPoint[n];
  for (i = 0; i < n; i++)
    {
      WC_to_NDC(px[i], py[i], tnr, x, y);
      seg_xform(&x, &y);
      NDC_to_DC(x, y, ix, iy);
      points[i].x = ix;
      points[i].y = iy;
    }
  p->pixmap->DrawPolygon(n, points);

  delete[] points;
}

static void text(double px, double py, int nchars, char *chars)
{
  int tx_font, tx_prec, tx_color;
  double x, y;

  tx_font = gkss->asf[6] ? gkss->txfont : predef_font[gkss->tindex - 1];
  tx_prec = gkss->asf[6] ? gkss->txprec : predef_prec[gkss->tindex - 1];
  tx_color = gkss->asf[9] ? gkss->txcoli : 1;

#if wxCHECK_VERSION(2, 9, 0)
  p->pixmap->SetPen(wxPen(p->rgb[tx_color], 1, wxPENSTYLE_SOLID));
#else
  p->pixmap->SetPen(wxPen(p->rgb[tx_color], 1, wxSOLID));
#endif
  p->pixmap->SetTextForeground(p->rgb[tx_color]);

  if (tx_prec == GKS_K_TEXT_PRECISION_STRING)
    {
      set_font(tx_font);

      WC_to_NDC(px, py, gkss->cntnr, x, y);
      seg_xform(&x, &y);

      text_routine(x, y, nchars, chars);
    }
  else
    gks_emul_text(px, py, nchars, chars, line_routine, fill_routine);
}

static void cellarray(double xmin, double xmax, double ymin, double ymax, int dx, int dy, int dimx, int *colia,
                      int true_color)
{
  double x1, y1, x2, y2;
  int ix1, ix2, iy1, iy2;
  int x, y, width, height;
  int i, j, ix, iy, ind;
  int swapx, swapy;
  int red, green, blue;

  WC_to_NDC(xmin, ymax, gkss->cntnr, x1, y1);
  seg_xform(&x1, &y1);
  NDC_to_DC(x1, y1, ix1, iy1);

  WC_to_NDC(xmax, ymin, gkss->cntnr, x2, y2);
  seg_xform(&x2, &y2);
  NDC_to_DC(x2, y2, ix2, iy2);

  width = abs(ix2 - ix1);
  height = abs(iy2 - iy1);
  if (width == 0 || height == 0) return;
  x = min(ix1, ix2);
  y = min(iy1, iy2);

  swapx = ix1 > ix2;
  swapy = iy1 < iy2;

  wxBitmap img(width, height, 32);
#if wxCHECK_VERSION(2, 9, 0)
  wxMemoryDC mem_dc(img);
  wxGCDC img_dc(mem_dc);
  img_dc.GetGraphicsContext()->SetAntialiasMode(wxANTIALIAS_NONE);
#else
  wxMemoryDC img_dc(img);
#endif
  img_dc.SetBackground(*wxWHITE_BRUSH);
  img_dc.Clear();

  if (!true_color)
    {
      for (j = 0; j < height; j++)
        {
          iy = dy * j / height;
          if (swapy) iy = dy - 1 - iy;
          for (i = 0; i < width; i++)
            {
              ix = dx * i / width;
              if (swapx) ix = dx - 1 - ix;

              ind = colia[iy * dimx + ix];
              red = p->rgb[ind].Red();
              green = p->rgb[ind].Green();
              blue = p->rgb[ind].Blue();
              img_dc.SetPen(wxPen(wxColour(red, green, blue)));
              draw_pixel(img_dc, wxPoint(i, j));
            }
        }
    }
  else
    {
      unsigned char *pixels = (unsigned char *)gks_malloc(width * height * 4);
      gks_resample((const unsigned char *)colia, pixels, dx, dy, width, height, dimx, swapx, swapy,
                   gkss->resample_method);
      for (j = 0; j < height; j++)
        {
          for (i = 0; i < width; i++)
            {
              unsigned char red = pixels[(j * width + i) * 4 + 0];
              unsigned char green = pixels[(j * width + i) * 4 + 1];
              unsigned char blue = pixels[(j * width + i) * 4 + 2];
              unsigned char alpha = pixels[(j * width + i) * 4 + 3];
              img_dc.SetPen(wxPen(wxColour(red, green, blue, alpha * gkss->alpha)));
              draw_pixel(img_dc, wxPoint(i, j));
            }
        }
      gks_free(pixels);
    }
  p->pixmap->DrawBitmap(img, x, y);
}

static wxBitmap *create_pattern(int pattern)
{
  int parray[33];
  int i, j;

  gks_inq_pattern_array(pattern, parray);

  wxBitmap *img = new wxBitmap(8, 8, 1);
#if wxCHECK_VERSION(2, 9, 0)
  wxMemoryDC mem_dc(*img);
  wxGCDC img_dc(mem_dc);
  img_dc.GetGraphicsContext()->SetAntialiasMode(wxANTIALIAS_NONE);
#else
  wxMemoryDC img_dc(*img);
#endif

  for (i = 0; i < 8; i++)
    for (j = 0; j < 8; j++)
      {
        img_dc.SetPen((parray[(i % parray[0]) + 1] >> j) & 0x01 ? *wxWHITE_PEN : *wxBLACK_PEN);
        draw_pixel(img_dc, wxPoint((j + 7) % 8, (i + 7) % 8));
      }

  return img;
}

#if defined(USE_WX_GCDC) && wxCHECK_VERSION(2, 9, 0)

static void destroy_clipping_region(wxGCDC &dc, bool antialias)
{
  dc.DestroyClippingRegion();
  // antialias mode has to be reset because of a bug in wxWidgets 2.9
  dc.GetGraphicsContext()->SetAntialiasMode(wxANTIALIAS_DEFAULT);
  if (!antialias)
    {
      dc.GetGraphicsContext()->SetAntialiasMode(wxANTIALIAS_NONE);
    }
}

#endif

static void fillarea(int n, double *px, double *py)
{
  int fl_inter, fl_style, fl_color;

  fl_inter = gkss->asf[10] ? gkss->ints : predef_ints[gkss->findex - 1];
  fl_style = gkss->asf[11] ? gkss->styli : predef_styli[gkss->findex - 1];
  fl_color = gkss->asf[12] ? gkss->facoli : 1;

  if (fl_inter == GKS_K_INTSTYLE_HOLLOW)
    {
#if wxCHECK_VERSION(2, 9, 0)
      p->pixmap->SetPen(wxPen(p->rgb[fl_color], 1, wxPENSTYLE_SOLID));
#else
      p->pixmap->SetPen(wxPen(p->rgb[fl_color], 1, wxSOLID));
#endif
      line_routine(n, px, py, DrawBorder, gkss->cntnr);
    }
  else if (fl_inter == GKS_K_INTSTYLE_SOLID)
    {
      p->pixmap->SetPen(*wxTRANSPARENT_PEN);
#if wxCHECK_VERSION(2, 9, 0)
      p->pixmap->SetBrush(wxBrush(p->rgb[fl_color], wxBRUSHSTYLE_SOLID));
#else
      p->pixmap->SetBrush(wxBrush(p->rgb[fl_color], wxSOLID));
#endif
      fill_routine(n, px, py, gkss->cntnr);
    }
  else if (fl_inter == GKS_K_INTSTYLE_PATTERN || fl_inter == GKS_K_INTSTYLE_HATCH)
    {
      if (fl_inter == GKS_K_INTSTYLE_HATCH) fl_style += HATCH_STYLE;
      if (fl_style >= PATTERNS) fl_style = 1;
      if (p->pattern[fl_style] == NULL) p->pattern[fl_style] = create_pattern(fl_style);
      p->pixmap->SetPen(*wxTRANSPARENT_PEN);
      // TODO: color
      p->pixmap->SetBrush(wxBrush(*p->pattern[fl_style]));
      fill_routine(n, px, py, gkss->cntnr);
    }
}

static void interp(char *str)
{
  char *s;
  gks_state_list_t *sl = NULL, saved_gkss;
  int sp = 0, *len, *f;
  int *i_arr = NULL, *dx = NULL, *dy = NULL, *dimx = NULL, *len_c_arr = NULL;
  double *f_arr_1 = NULL, *f_arr_2 = NULL;
  char *c_arr = NULL;
  int i, true_color = 0;

  s = str;

  RESOLVE(len, int, sizeof(int));
  while (*len > 0)
    {
      RESOLVE(f, int, sizeof(int));

      switch (*f)
        {
        case 2: /* open workstation */
          RESOLVE(sl, gks_state_list_t, sizeof(gks_state_list_t));
          sp += 3 * sizeof(int); /* ignore workstation type */
          break;

        case 12: /* polyline */
        case 13: /* polymarker */
        case 15: /* fill area */
          RESOLVE(i_arr, int, sizeof(int));
          RESOLVE(f_arr_1, double, i_arr[0] * sizeof(double));
          RESOLVE(f_arr_2, double, i_arr[0] * sizeof(double));
          break;

        case 14: /* text */
          RESOLVE(f_arr_1, double, sizeof(double));
          RESOLVE(f_arr_2, double, sizeof(double));
          RESOLVE(len_c_arr, int, sizeof(int));
          RESOLVE(c_arr, char, GKS_K_TEXT_MAX_SIZE);
          /* dummy assignment to avoid warning 'set but not used' */
          *len_c_arr = *len_c_arr;
          break;

        case 16:  /* cell array */
        case 201: /* draw image */
          RESOLVE(f_arr_1, double, 2 * sizeof(double));
          RESOLVE(f_arr_2, double, 2 * sizeof(double));
          RESOLVE(dx, int, sizeof(int));
          RESOLVE(dy, int, sizeof(int));
          RESOLVE(dimx, int, sizeof(int));
          RESOLVE(i_arr, int, *dimx **dy * sizeof(int));
          break;

        case 19:  /* set linetype */
        case 21:  /* set polyline color index */
        case 23:  /* set markertype */
        case 25:  /* set polymarker color index */
        case 30:  /* set text color index */
        case 33:  /* set text path */
        case 36:  /* set fillarea interior style */
        case 37:  /* set fillarea style index */
        case 38:  /* set fillarea color index */
        case 52:  /* select normalization transformation */
        case 53:  /* set clipping indicator */
        case 108: /* set resample method */
          RESOLVE(i_arr, int, sizeof(int));
          break;

        case 27: /* set text font and precision */
        case 34: /* set text alignment */
          RESOLVE(i_arr, int, 2 * sizeof(int));
          break;

        case 20:  /* set linewidth scale factor */
        case 24:  /* set marker size scale factor */
        case 28:  /* set character expansion factor */
        case 29:  /* set character spacing */
        case 31:  /* set character height */
        case 200: /* set text slant */
        case 203: /* set transparency */
          RESOLVE(f_arr_1, double, sizeof(double));
          break;

        case 32: /* set character up vector */
          RESOLVE(f_arr_1, double, sizeof(double));
          RESOLVE(f_arr_2, double, sizeof(double));
          break;

        case 41: /* set aspect source flags */
          RESOLVE(i_arr, int, 13 * sizeof(int));
          break;

        case 48: /* set color representation */
          RESOLVE(i_arr, int, sizeof(int));
          RESOLVE(f_arr_1, double, 3 * sizeof(double));
          break;

        case 49: /* set window */
        case 50: /* set viewport */
        case 54: /* set workstation window */
        case 55: /* set workstation viewport */
          RESOLVE(i_arr, int, sizeof(int));
          RESOLVE(f_arr_1, double, 2 * sizeof(double));
          RESOLVE(f_arr_2, double, 2 * sizeof(double));
          break;

        case 202: /* set shadow */
          RESOLVE(f_arr_1, double, 3 * sizeof(double));
          break;

        case 204: /* set coord xform */
          RESOLVE(f_arr_1, double, 6 * sizeof(double));
          break;

        default:
          gks_perror("display list corrupted (len=%d, fctid=%d)", *len, *f);
          exit(1);
        }

      switch (*f)
        {
        case 2:
          memmove(&saved_gkss, gkss, sizeof(gks_state_list_t));
          memmove(gkss, sl, sizeof(gks_state_list_t));

          p->window[0] = p->window[2] = 0.0;
          p->window[1] = p->window[3] = 1.0;

          p->viewport[0] = p->viewport[2] = 0.0;
          p->viewport[1] = p->width * MWIDTH / WIDTH;
          p->viewport[3] = p->height * MWIDTH / HEIGHT;

          set_xform();
          init_norm_xform();
          init_colors();

          gks_init_core(gkss);
          break;

        case 12:
          polyline(i_arr[0], f_arr_1, f_arr_2);
          break;

        case 13:
          polymarker(i_arr[0], f_arr_1, f_arr_2);
          break;

        case 14:
          text(f_arr_1[0], f_arr_2[0], strlen(c_arr), c_arr);
          break;

        case 15:
          fillarea(i_arr[0], f_arr_1, f_arr_2);
          break;

        case 16:
        case 201:
          true_color = *f == DRAW_IMAGE;
          cellarray(f_arr_1[0], f_arr_1[1], f_arr_2[0], f_arr_2[1], *dx, *dy, *dimx, i_arr, true_color);
          break;

        case 19:
          gkss->ltype = i_arr[0];
          break;

        case 20:
          gkss->lwidth = f_arr_1[0];
          break;

        case 21:
          gkss->plcoli = i_arr[0];
          break;

        case 23:
          gkss->mtype = i_arr[0];
          break;

        case 24:
          gkss->mszsc = f_arr_1[0];
          break;

        case 25:
          gkss->pmcoli = i_arr[0];
          break;

        case 27:
          gkss->txfont = i_arr[0];
          gkss->txprec = i_arr[1];
          break;

        case 28:
          gkss->chxp = f_arr_1[0];
          break;

        case 29:
          gkss->chsp = f_arr_1[0];
          break;

        case 30:
          gkss->txcoli = i_arr[0];
          break;

        case 31:
          gkss->chh = f_arr_1[0];
          break;

        case 32:
          gkss->chup[0] = f_arr_1[0];
          gkss->chup[1] = f_arr_2[0];
          break;

        case 33:
          gkss->txp = i_arr[0];
          break;

        case 34:
          gkss->txal[0] = i_arr[0];
          gkss->txal[1] = i_arr[1];
          break;

        case 36:
          gkss->ints = i_arr[0];
          break;

        case 37:
          gkss->styli = i_arr[0];
          break;

        case 38:
          gkss->facoli = i_arr[0];
          break;

        case 41:
          for (i = 0; i < 13; i++) gkss->asf[i] = i_arr[i];
          break;

        case 48:
          set_color_rep(i_arr[0], f_arr_1[0], f_arr_1[1], f_arr_1[2]);
          break;

        case 49:
          gkss->window[*i_arr][0] = f_arr_1[0];
          gkss->window[*i_arr][1] = f_arr_1[1];
          gkss->window[*i_arr][2] = f_arr_2[0];
          gkss->window[*i_arr][3] = f_arr_2[1];
          set_xform();
          set_norm_xform(*i_arr, gkss->window[*i_arr], gkss->viewport[*i_arr]);
          gks_set_norm_xform(*i_arr, gkss->window[*i_arr], gkss->viewport[*i_arr]);
          break;

        case 50:
          gkss->viewport[*i_arr][0] = f_arr_1[0];
          gkss->viewport[*i_arr][1] = f_arr_1[1];
          gkss->viewport[*i_arr][2] = f_arr_2[0];
          gkss->viewport[*i_arr][3] = f_arr_2[1];
          set_norm_xform(*i_arr, gkss->window[*i_arr], gkss->viewport[*i_arr]);
          gks_set_norm_xform(*i_arr, gkss->window[*i_arr], gkss->viewport[*i_arr]);

          if (*i_arr == gkss->cntnr) set_clip_rect(*i_arr);
          break;

        case 52:
          gkss->cntnr = i_arr[0];
          set_clip_rect(gkss->cntnr);
          break;

        case 53:
          gkss->clip = i_arr[0];
          set_clip_rect(gkss->cntnr);
          break;

        case 54:
          p->window[0] = f_arr_1[0];
          p->window[1] = f_arr_1[1];
          p->window[2] = f_arr_2[0];
          p->window[3] = f_arr_2[1];

          set_xform();
          init_norm_xform();
          break;

        case 55:
          p->viewport[0] = f_arr_1[0];
          p->viewport[1] = f_arr_1[1];
          p->viewport[2] = f_arr_2[0];
          p->viewport[3] = f_arr_2[1];

          set_xform();
          init_norm_xform();
          break;

        case 108:
          gkss->resample_method = i_arr[0];
          break;

        case 200:
          gkss->txslant = f_arr_1[0];
          break;
        }

      RESOLVE(len, int, sizeof(int));
    }

  memmove(gkss, &saved_gkss, sizeof(gks_state_list_t));
}

void get_pixmap(void)
{
  char *env;

  env = (char *)gks_getenv("GKS_CONID");
  if (!env) env = (char *)gks_getenv("GKSconid");

  if (env != NULL)
    {
      sscanf(env, "%p!%p", (void **)&p->widget, (void **)&p->pixmap);
    }
  else
    {
      gks_perror("can't obtain Wx drawable");
      exit(1);
    }

  p->widget->GetSize(&p->width, &p->height);
}

void gks_wxplugin(int fctid, int dx, int dy, int dimx, int *i_arr, int len_f_arr_1, double *f_arr_1, int len_f_arr_2,
                  double *f_arr_2, int len_c_arr, char *c_arr, void **ptr)
{
  int i;

  p = (ws_state_list *)*ptr;

  switch (fctid)
    {
    case 2:
      gkss = (gks_state_list_t *)*ptr;
      p = new ws_state_list;

      p->width = p->height = 500;

      p->font = new wxFont();

      p->points = new wxPoint[MAX_POINTS];
      p->npoints = 0;
      p->max_points = MAX_POINTS;

      for (i = 0; i < PATTERNS; i++) p->pattern[i] = NULL;

      *ptr = p;
      break;

    case 3:
      for (i = 0; i < PATTERNS; i++)
        if (p->pattern[i] != NULL) delete p->pattern[i];

      delete p->points;
      delete p->font;
      delete p;

      p = NULL;
      break;

    case 6:
      /* set display list length to zero */
      memset(p->dl.buffer, 0, sizeof(int));
      p->dl.buffer[0] = '\0';
      p->dl.nbytes = 0;
      break;

    case 8:
      if (i_arr[1] & GKS_K_PERFORM_FLAG)
        {
          get_pixmap();
          interp(p->dl.buffer);
        }
      break;

    default:;
    }

  if (p != NULL)
    gks_dl_write_item(&p->dl, fctid, dx, dy, dimx, i_arr, len_f_arr_1, f_arr_1, len_f_arr_2, f_arr_2, len_c_arr, c_arr,
                      gkss);
}

#else

void gks_wxplugin(int fctid, int dx, int dy, int dimx, int *ia, int lr1, double *r1, int lr2, double *r2, int lc,
                  char *chars, void **ptr)
{
  GKS_UNUSED(dx);
  GKS_UNUSED(dy);
  GKS_UNUSED(dimx);
  GKS_UNUSED(ia);
  GKS_UNUSED(lr1);
  GKS_UNUSED(r1);
  GKS_UNUSED(lr2);
  GKS_UNUSED(r2);
  GKS_UNUSED(lc);
  GKS_UNUSED(chars);
  GKS_UNUSED(ptr);

  if (fctid == 2)
    {
      gks_perror("Wx support not compiled in");
      ia[0] = 0;
    }
}

#endif