text: #include <emscripten.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <stdarg.h>
  #include <string.h>
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <math.h>
  #include <png.h>
  
  typedef struct JS_point_t
  {
    double x, y;
  } JS_point;
  
  #ifdef __cplusplus
  #define extern "C" {
  #endif
  
  extern void js_stroke(int n, JS_point *points, unsigned char color[4], int linewidth);
  extern void js_text(double x, double y, int n, char *chars, int height, double top, double angle, int bold, int italic,
                      int align, int valign, int font, unsigned char rgb[4]);
  extern void js_cellarray(int x, int y, int width, int height, int colia[]);
  extern void js_line_routine(int n, double *px, double *py, int linetype, int fill, int width, unsigned char *rgb);
  extern void js_point(double x, double y, unsigned char *rgb);
  extern void js_line(double x1, double y1, double x2, double y2, unsigned char *rgb);
  extern void js_circle(double x, double y, double r, int fill, unsigned char *rgb);
  extern void js_fill_routine(int n, double *px, double *py, unsigned char *color);
  extern void js_pattern_routine(int n, double *px, double *py, int *rgb);
  extern void js_clip_path(int x, int y, int width, int height);
  extern void js_reset_clipping(void);
  extern void js_clear(void);
  extern int js_get_ws_width(void);
  extern int js_get_ws_height(void);
  
  #ifdef __cplusplus
  #define }
  #endif
  
  #if !defined(VMS) && !defined(_WIN32)
  #include <unistd.h>
  #endif
  
  #include "gks.h"
  #include "gkscore.h"
  
  #define MEMORY_INCREMENT 32768
  
  #define MAX_POINTS 2048
  #define PATTERNS 120
  #define HATCH_STYLE 108
  
  #define MWIDTH 0.16384
  #define MHEIGHT 0.12288
  #define WIDTH 640
  #define HEIGHT 480
  
  #define DrawBorder 0
  
  #ifndef M_PI
  #define M_PI 3.14159265358979323846
  #endif
  
  #ifndef MAXPATHLEN
  #define MAXPATHLEN 1024
  #endif
  
  #ifdef _WIN32
  
  #include <windows.h>
  #define DLLEXPORT __declspec(dllexport)
  
  #ifdef __cplusplus
  extern "C"
  {
  #endif
  
  #else
  
  #ifdef __cplusplus
  #define DLLEXPORT extern "C"
  #else
  #define DLLEXPORT
  #endif
  
  #endif
  
  
  #ifdef _WIN32
  #ifdef __cplusplus
  }
  #endif
  #endif
  
  #define MAX_TNR 9
  
  #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 = (p->a * (xn) + p->b);      \
    yd = (p->c * (yn) + p->d)
  
  #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
  {
    int conid, state, wtype;
    double a, b, c, d;
    double window[4], viewport[4];
    unsigned char rgb[MAX_COLOR][4];
    int width, height;
    int color, linewidth;
    double angle;
    int family, capheight;
    int pattern, have_pattern[PATTERNS];
    JS_point *points;
    int npoints, max_points;
    int empty, page_counter, offset;
    double cxl[MAX_TNR], cxr[MAX_TNR], cyb[MAX_TNR], cyt[MAX_TNR];
    double alpha;
  } ws_state_list;
  
  static ws_state_list *p;
  
  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 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_clip_path(int tnr);
  
  static void set_norm_xform(int tnr, double *wn, double *vp)
  {
    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], p->cxl[tnr], p->cyt[tnr]);
    NDC_to_DC(vp[1], vp[2], p->cxr[tnr], p->cyb[tnr]);
    p->cxr[tnr] += 1;
    p->cyb[tnr] += 1;
  }
  
  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 / (p->window[1] - p->window[0]);
    p->b = -p->window[0] * p->a;
    p->c = p->height / (p->window[2] - p->window[3]);
    p->d = p->height - 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_color_rep(int color, double red, double green, double blue)
  {
    if (color >= 0 && color < MAX_COLOR)
      {
        p->rgb[color][0] = red * 255;
        p->rgb[color][1] = green * 255;
        p->rgb[color][2] = blue * 255;
        p->rgb[color][3] = 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 resize_window(void)
  {
    p->width = nint((p->viewport[1] - p->viewport[0]) / MWIDTH * WIDTH);
    p->height = nint((p->viewport[3] - p->viewport[2]) / MHEIGHT * HEIGHT);
  }
  
  static void draw_marker(double xn, double yn, int mtype, double mscale, int mcolor)
  {
    int r, i;
    double scale, x, y, xr, yr;
    int pc, op, fill;
    double x1, x2, y1, y2;
    double *px, *py;
    int color;
  
  #include "marker.h"
  
    if (gkss->version > 4) mscale *= (p->width + p->height) * 0.001;
    r = (int)(3 * mscale);
    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 = (r > 0) ? mtype + marker_off : marker_off + 1;
  
    do
      {
        op = marker[mtype][pc];
        switch (op)
          {
          case 1: /* point */
            js_point(x, y, p->rgb[mcolor]);
            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);
                if (i == 0)
                  {
                    x1 = x - xr;
                    y1 = y + yr;
                  }
                else
                  {
                    x2 = x - xr;
                    y2 = y + yr;
                  }
              }
            pc += 4;
            js_line(x1, y1, x2, y2, p->rgb[mcolor]);
            break;
  
          case 3: /* polyline */
            px = malloc(marker[mtype][pc + 1] * sizeof(double));
            py = malloc(marker[mtype][pc + 1] * sizeof(double));
            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);
                px[i] = x - xr;
                py[i] = y + yr;
              }
            js_line_routine(marker[mtype][pc + 1], px, py, 1, 0, 1, p->rgb[mcolor]);
            pc += 1 + 2 * marker[mtype][pc + 1];
            free(px);
            free(py);
            break;
  
          case 4: /* filled polygon */
          case 5: /* hollow polygon */
            if (op == 5)
              {
                fill = 0;
              }
            else
              {
                fill = 1;
              }
            px = malloc(marker[mtype][pc + 1] * sizeof(double));
            py = malloc(marker[mtype][pc + 1] * sizeof(double));
            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);
                px[i] = x - xr;
                py[i] = y + yr;
              }
            js_line_routine(marker[mtype][pc + 1], px, py, 0, fill, 1, p->rgb[mcolor]);
            free(px);
            free(py);
            pc += 1 + 2 * marker[mtype][pc + 1];
            if (op == 5) p->color = mcolor;
            break;
  
          case 6: /* arc */
            js_circle(x, y, r, 0, p->rgb[mcolor]);
            break;
  
          case 7: /* filled arc */
          case 8: /* hollow arc */
            if (op == 8)
              {
                js_circle(x, y, r, 0, p->rgb[mcolor]);
              }
            else
              {
                js_circle(x, y, r, 1, p->rgb[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];
    register 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;
  
    marker_routine(n, px, py, mk_type, mk_size, mk_color);
  }
  
  static void stroke(void)
  {
    unsigned char color[4];
    color[0] = p->rgb[p->color][0];
    color[1] = p->rgb[p->color][1];
    color[2] = p->rgb[p->color][2];
    color[3] = p->alpha;
  
    js_stroke(p->npoints, p->points, color, p->linewidth);
    p->npoints = 0;
  }
  
  static void move_to(double x, double y)
  {
    if (p->npoints > 0) stroke();
  
    NDC_to_DC(x, y, p->points[p->npoints].x, p->points[p->npoints].y);
    p->npoints++;
  }
  
  static void line_to(double x, double y)
  {
    NDC_to_DC(x, y, p->points[p->npoints].x, p->points[p->npoints].y);
    p->npoints++;
  }
  
  static void move(double x, double y)
  {
    gks_move(x, y, move_to);
  }
  
  static void draw(double x, double y)
  {
    gks_dash(x, y, move_to, line_to);
  }
  
  static void line_routine(int n, double *px, double *py, int linetype, int tnr)
  {
    unsigned char color[4];
    color[0] = p->rgb[p->color][0];
    color[1] = p->rgb[p->color][1];
    color[2] = p->rgb[p->color][2];
    color[3] = p->alpha;
  
    js_line_routine(n, px, py, linetype, 0, 1, color);
  }
  
  static void line_routine_with_transform(int n, double *px, double *py, int linetype, int tnr)
  {
    double x, y, *ix, *iy;
  
    ix = malloc(n * sizeof(double));
    iy = malloc(n * sizeof(double));
    for (int 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[i], iy[i]);
      }
    line_routine(n, ix, iy, linetype, tnr);
    free(ix);
    free(iy);
  }
  
  static void fill_routine(int n, double *px, double *py, int tnr)
  {
    unsigned char color[4];
  
    color[0] = p->rgb[p->color][0];
    color[1] = p->rgb[p->color][1];
    color[2] = p->rgb[p->color][2];
    color[3] = p->alpha;
    js_fill_routine(n, px, py, color);
  }
  
  static void fillarea(int n, double *px, double *py)
  {
    int fl_inter, fl_style, fl_color, col, col2;
    unsigned char color[4];
    double x, y, *ix, *iy;
    int parray[33];
    int *patp;
  
    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;
  
    p->pattern = 0;
    if (fl_inter == GKS_K_INTSTYLE_HOLLOW)
      {
        p->color = fl_color;
        ix = malloc(n * sizeof(double));
        iy = malloc(n * sizeof(double));
        for (int 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[i], iy[i]);
          }
        color[0] = p->rgb[p->color][0];
        color[1] = p->rgb[p->color][1];
        color[2] = p->rgb[p->color][2];
        color[3] = p->alpha;
        js_line_routine(n, ix, iy, 0, 0, 1, color);
        free(ix);
        free(iy);
      }
    else if (fl_inter == GKS_K_INTSTYLE_SOLID)
      {
        p->color = fl_color;
        color[0] = p->rgb[p->color][0];
        color[1] = p->rgb[p->color][1];
        color[2] = p->rgb[p->color][2];
        color[3] = p->alpha;
        ix = malloc(n * sizeof(double));
        iy = malloc(n * sizeof(double));
        for (int 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[i], iy[i]);
          }
        js_line_routine(n, ix, iy, 0, 1, 1, color);
        free(ix);
        free(iy);
      }
    else if (fl_inter == GKS_K_INTSTYLE_PATTERN || fl_inter == GKS_K_INTSTYLE_HATCH)
      {
        p->color = fl_color;
        if (fl_inter == GKS_K_INTSTYLE_HATCH) fl_style += HATCH_STYLE;
        if (fl_style >= PATTERNS) fl_style = 1;
  
  
        p->pattern = fl_style;
        gks_inq_pattern_array(fl_style, parray);
        col = (255 << 0) + (255 << 8) + (255 << 16) + (255 << 24);
        col2 = (0 << 0) + (0 << 8) + (0 << 16) + (255 << 24);
        patp = malloc(64 * sizeof(int));
        for (int i = 0; i < 8; i++)
          for (int j = 0; j < 8; j++) patp[i * 8 + j] = (((parray[(j % parray[0]) + 1] >> i) & 0x01) ? col : col2);
        ix = malloc(n * sizeof(double));
        iy = malloc(n * sizeof(double));
        for (int 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[i], iy[i]);
          }
        js_pattern_routine(n, ix, iy, patp);
        free(ix);
        free(iy);
        free(patp);
      }
  }
  
  static void polyline(int n, double *px, double *py)
  {
    int ln_type, ln_color;
    double ln_width;
    int width;
  
    if (n > p->max_points)
      {
        p->points = (JS_point *)realloc(p->points, n * sizeof(JS_point));
        p->max_points = n;
      }
  
    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;
  
    if (gkss->version > 4)
      width = nint(ln_width * (p->width + p->height) * 0.001);
    else
      width = nint(ln_width);
    if (width < 1) width = 0;
  
    p->linewidth = width;
    p->color = ln_color;
  
    gks_set_dev_xform(gkss, p->window, p->viewport);
    line_routine_with_transform(n, px, py, ln_type, gkss->cntnr);
  
    if (p->npoints > 0) stroke();
  }
  
  static void text(double px, double py, int nchars, char *chars)
  {
    int tx_font, tx_prec, tx_color;
    double x, y, xstart, ystart;
    int ch, font;
    double xrel, yrel, ax, ay;
  
    double scale, ux, uy, angle;
    int size;
    double capheight, width, height;
    int bold, italic, boit;
  
    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;
  
    p->color = tx_color;
  
    if (tx_prec == GKS_K_TEXT_PRECISION_STRING)
      {
        font = tx_font;
  
        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);
  
        angle = -atan2(ux, uy) * 180 / M_PI;
        if (angle < 0) angle += 360;
        p->angle = -angle;
  
        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);
  
        size = nint(capheight / capheights[font - 1]);
        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);
  
  
        WC_to_NDC(px, py, gkss->cntnr, x, y);
        seg_xform(&x, &y);
        NDC_to_DC(x, y, xstart, ystart);
  
        width = 0;
        height = p->capheight;
  
        if (gkss->txal[0] == GKS_K_TEXT_HALIGN_CENTER)
          {
            js_text(xstart, ystart, nchars, chars, size, gkss->chh, p->angle, bold, italic, 1, gkss->txal[1], p->family,
                    p->rgb[p->color]);
          }
        else if (gkss->txal[0] == GKS_K_TEXT_HALIGN_RIGHT)
          {
            js_text(xstart, ystart, nchars, chars, size, gkss->chh, p->angle, bold, italic, 2, gkss->txal[1], p->family,
                    p->rgb[p->color]);
          }
        else
          {
            js_text(xstart, ystart, nchars, chars, size, gkss->chh, p->angle, bold, italic, 0, gkss->txal[1], p->family,
                    p->rgb[p->color]);
          }
      }
    else
      gks_emul_text(px, py, nchars, chars, line_routine_with_transform, 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;
    register int i, j, ix, iy, ind;
    int swapx, swapy, *tmpptr;
  
    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;
  
    tmpptr = (int *)gks_malloc(dx * dy * sizeof(int));
    for (i = 0; i < dx; i++)
      for (j = 0; j < dy; j++)
        {
          ix = swapx ? dx - i - 1 : i;
          iy = swapy ? dy - j - 1 : j;
          tmpptr[iy * dx + ix] = colia[j * dimx + i];
        }
  
    if (dx != width || dy != height)
      {
        colia = gks_resize(tmpptr, dx, dy, width, height);
        free(tmpptr);
      }
    else
      colia = tmpptr;
  
    if (!true_color)
      {
        for (i = 0; i < width * height; i++)
          {
            ind = colia[i];
            if (ind >= MAX_COLOR) ind = MAX_COLOR - 1;
            colia[i] = (int)(p->rgb[ind][0] << 0) + ((int)(p->rgb[ind][1]) << 8) + ((int)(p->rgb[ind][2]) << 16) +
                       ((int)(p->rgb[ind][3]) << 24);
          }
      }
    js_cellarray(x, y, width, height, colia);
    free(colia);
  }
  
  static void set_clip_path(int tnr)
  {
    int x, y, width, height;
    int i, found = 0, index;
  
    if (gkss->clip == GKS_K_CLIP)
      {
        x = (int)p->cxl[tnr];
        y = (int)p->cyt[tnr];
        width = (int)(p->cxr[tnr] - p->cxl[tnr]);
        height = (int)(p->cyb[tnr] - p->cyt[tnr]);
      }
    else
      {
        js_reset_clipping();
        return;
      }
    js_clip_path(x, y, width, height);
  }
  
  
  void gks_drv_js(int fctid, int dx, int dy, int dimx, int *ia, int lr1, double *r1, int lr2, double *r2, int lc,
                  char *chars, void **ptr)
  {
    register int i;
  
    p = (ws_state_list *)*ptr;
  
    switch (fctid)
      {
        /* open workstation */
      case 2:
        gkss = (gks_state_list_t *)*ptr;
  
        gks_init_core(gkss);
  
        p = (ws_state_list *)calloc(1, sizeof(ws_state_list));
  
        p->conid = ia[1];
        p->height = js_get_ws_height();
        p->width = js_get_ws_width();
        p->window[0] = p->window[2] = 0.0;
        p->window[1] = p->window[3] = 1.0;
        p->viewport[0] = p->viewport[2] = 0;
        p->viewport[1] = (double)p->width * MWIDTH / WIDTH;
        p->viewport[3] = (double)p->height * MHEIGHT / HEIGHT;
  
        r1[0] = p->width * MWIDTH / WIDTH;
        r2[0] = p->height * MHEIGHT / HEIGHT;
        ia[0] = p->width;
        ia[1] = p->height;
  
        p->max_points = MAX_POINTS;
        p->points = (JS_point *)gks_malloc(p->max_points * sizeof(JS_point));
        p->npoints = 0;
  
        p->empty = 1;
        p->page_counter = 0;
        p->offset = 0;
  
        p->alpha = 1.0;
  
        set_xform();
        init_norm_xform();
        init_colors();
  
        for (i = 0; i < PATTERNS; i++) p->have_pattern[i] = 0;
  
        *ptr = p;
        break;
  
        /* close workstation */
      case 3:
        if (!p->empty) free(p->points);
        free(p);
        break;
  
        /* activate workstation */
      case 4:
        p->state = GKS_K_WS_ACTIVE;
        break;
  
        /* deactivate workstation */
      case 5:
        p->state = GKS_K_WS_INACTIVE;
        break;
  
        /* clear workstation */
      case 6:
        if (!p->empty)
          {
            p->empty = 1;
            js_clear();
          }
        break;
  
        /* update workstation */
      case 8:
        break;
  
        /* polyline */
      case 12:
        if (p->state == GKS_K_WS_ACTIVE)
          {
            polyline(ia[0], r1, r2);
            p->empty = 0;
          }
        break;
  
        /* polymarker */
      case 13:
        if (p->state == GKS_K_WS_ACTIVE)
          {
            polymarker(ia[0], r1, r2);
            p->empty = 0;
          }
        break;
  
        /* text */
      case 14:
        if (p->state == GKS_K_WS_ACTIVE)
          {
            text(r1[0], r2[0], strlen(chars), chars);
            p->empty = 0;
          }
        break;
  
        /* fill area */
      case 15:
        if (p->state == GKS_K_WS_ACTIVE)
          {
            fillarea(ia[0], r1, r2);
            p->empty = 0;
          }
        break;
  
        /* cell array */
      case 16:
      case DRAW_IMAGE:
        if (p->state == GKS_K_WS_ACTIVE)
          {
            int true_color = fctid == DRAW_IMAGE;
  
            cellarray(r1[0], r1[1], r2[0], r2[1], dx, dy, dimx, ia, true_color);
            p->empty = 0;
          }
        break;
  
        /* set color representation */
      case 48:
        set_color_rep(ia[1], r1[0], r1[1], r1[2]);
        break;
  
      case 49:
        /* set window */
        set_norm_xform(*ia, gkss->window[*ia], gkss->viewport[*ia]);
        break;
  
      case 50:
        /* set viewport */
        set_norm_xform(*ia, gkss->window[*ia], gkss->viewport[*ia]);
        if (*ia == gkss->cntnr) set_clip_path(*ia);
        break;
  
      case 52:
        /* select normalization transformation */
      case 53:
        /* set clipping inidicator */
        set_clip_path(gkss->cntnr);
        break;
  
        /* set workstation window */
      case 54:
        p->window[0] = r1[0];
        p->window[1] = r1[1];
        p->window[2] = r2[0];
        p->window[3] = r2[1];
  
        set_xform();
        init_norm_xform();
        break;
  
        /* set workstation viewport */
      case 55:
        p->viewport[0] = r1[0];
        p->viewport[1] = r1[1];
        p->viewport[2] = r2[0];
        p->viewport[3] = r2[1];
  
        resize_window();
        set_xform();
        init_norm_xform();
        break;
  
      case 203:
        /* set transparency */
        p->alpha = r1[0];
        break;
  
      default:;
      }
  }
  