textlayouter: added method to get marked text

[iv.d.git] / cmdcon / gl.d

/* coded by Ketmar // Invisible Vector <ketmar@ketmar.no-ip.org>
 * Understanding is not required. Only obedience.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 3 of the License ONLY.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
module iv.cmdcon.gl /*is aliced*/;
private:

import iv.alice;
public import iv.cmdcon;
import iv.vfs;
import iv.strex;
import iv.pxclock;

static if (__traits(compiles, (){import arsd.simpledisplay;}())) {
  enum OptCmdConGlHasSdpy = true;
  import arsd.simpledisplay : UsingSimpledisplayX11;
} else {
  enum OptCmdConGlHasSdpy = false;
  private enum UsingSimpledisplayX11 = false;
}


// ////////////////////////////////////////////////////////////////////////// //
public __gshared bool glconAllowOpenGLRender = true;
__gshared uint conScale = 0;
__gshared uint scrwdt, scrhgt;

public __gshared void delegate () glconOnShow = null;
public __gshared void delegate () glconOnHide = null;


// ////////////////////////////////////////////////////////////////////////// //
// public void glconInit (); -- call in `visibleForTheFirstTime`
// public void glconDraw (); -- call in `redrawOpenGlScene` (it tries hard to not modify render modes)
// public bool glconKeyEvent (KeyEvent event); -- returns `true` if event was eaten
// public bool glconCharEvent (dchar ch); -- returns `true` if event was eaten
//
// public bool conProcessQueue (); (from iv.cmdcon)
//   call this in your main loop to process all accumulated console commands.

// ////////////////////////////////////////////////////////////////////////// //
public bool isConsoleVisible () nothrow @trusted @nogc { pragma(inline, true); return rConsoleVisible; } ///
public bool isQuitRequested () nothrow @trusted @nogc { pragma(inline, true); import core.atomic; return atomicLoad(vquitRequested); } ///
public void setQuitRequested () nothrow @trusted @nogc { pragma(inline, true); import core.atomic; atomicStore(vquitRequested, true); } ///

public void glconHide () nothrow @trusted @nogc { if (rConsoleVisible) { rConsoleVisible = false; /*glconCallShowHideHandler();*/ } } ///
public void glconShow () nothrow @trusted @nogc { if (!rConsoleVisible) { rConsoleVisible = true; /*glconCallShowHideHandler();*/ } } ///


// ////////////////////////////////////////////////////////////////////////// //
/// you may call this in char event, but `glconCharEvent()` will do that for you
public void glconCharInput (char ch) {
  if (!ch) return;
  consoleLock();
  scope(exit) consoleUnlock();

  int rchgt = getEffectiveConHeight;

  if (ch == ConInputChar.PageUp) {
    int lnx = rchgt/conCharHeight-2;
    if (lnx < 1) lnx = 1;
    conskiplines += lnx;
    conLastChange = 0;
    return;
  }

  if (ch == ConInputChar.PageDown) {
    if (conskiplines > 0) {
      int lnx = rchgt/conCharHeight-2;
      if (lnx < 1) lnx = 1;
      if ((conskiplines -= lnx) < 0) conskiplines = 0;
      conLastChange = 0;
    }
    return;
  }

  if (ch == ConInputChar.LineUp) {
    ++conskiplines;
    conLastChange = 0;
    return;
  }

  if (ch == ConInputChar.LineDown) {
    if (conskiplines > 0) {
      --conskiplines;
      conLastChange = 0;
    }
    return;
  }

  if (ch == ConInputChar.Enter) {
    if (conskiplines) { conskiplines = 0; conLastChange = 0; }
    auto s = conInputBuffer;
    if (s.length > 0) {
      concmdAdd(s);
      conInputBufferClear(true); // add to history
      conLastChange = 0;
    }
    return;
  }

  //if (ch == '`' && conInputBuffer.length == 0) { concmd("r_console ona"); return; }

  auto pcc = conInputLastChange();
  conAddInputChar(ch);
  if (pcc != conInputLastChange()) conLastChange = 0;
}


// ////////////////////////////////////////////////////////////////////////// //
enum conCharWidth = 10;
enum conCharHeight = 10;

__gshared char rPromptChar = '>';
__gshared float rConAlpha = 0.8;
__gshared bool rConsoleVisible = false;
__gshared bool rConsoleVisiblePrev = false;
__gshared float rConsoleHeight = 0.7;
__gshared uint rConTextColor = 0x00ff00; // rgb
__gshared uint rConCursorColor = 0xff7f00; // rgb
__gshared uint rConInputColor = 0xffff00; // rgb
__gshared uint rConPromptColor = 0xffffff; // rgb
__gshared uint rConStarColor = 0x3f0000; // rgb
shared bool vquitRequested = false;

__gshared int conskiplines = 0;


// initialize glcmdcon variables and commands, sets screen size and scale
// NOT THREAD-SAFE! also, should be called only once.
// screen dimensions can be fixed later by calling `glconResize()`.
private void initConsole () {
  enum ascrwdt = 800;
  enum ascrhgt = 600;
  enum ascale = 1;
  if (conScale != 0) assert(0, "cmdcon already initialized");
  if (ascrwdt < 64 || ascrhgt < 64 || ascrwdt > 4096 || ascrhgt > 4096) assert(0, "invalid cmdcon dimensions");
  if (ascale < 1 || ascale > 64) assert(0, "invalid cmdcon scale");
  scrwdt = ascrwdt;
  scrhgt = ascrhgt;
  conScale = ascale;
  conRegVar!rConsoleVisible("r_console", "console visibility"/*, ConVarAttr.Archive*/);
  conRegVar!rConsoleHeight(0, 1, "r_conheight", "console height", ConVarAttr.Archive);
  conRegVar!rConTextColor("r_contextcolor", "console log text color, 0xrrggbb", ConVarAttr.Archive, ConVarAttr.Hex);
  conRegVar!rConCursorColor("r_concursorcolor", "console cursor color, 0xrrggbb", ConVarAttr.Archive, ConVarAttr.Hex);
  conRegVar!rConInputColor("r_coninputcolor", "console input color, 0xrrggbb", ConVarAttr.Archive, ConVarAttr.Hex);
  conRegVar!rConPromptColor("r_conpromptcolor", "console prompt color, 0xrrggbb", ConVarAttr.Archive, ConVarAttr.Hex);
  conRegVar!rConStarColor("r_constarcolor", "console star color, 0xrrggbb", ConVarAttr.Archive, ConVarAttr.Hex);
  conRegVar!rPromptChar("r_conpromptchar", "console prompt character", ConVarAttr.Archive);
  conRegVar!rConAlpha("r_conalpha", "console transparency (0 is fully transparent, 1 is opaque)", ConVarAttr.Archive);
  scrhgt = 0;
  conRegFunc!({
    import core.atomic;
    atomicStore(vquitRequested, true);
  })("quit", "quit");
}

shared static this () { initConsole(); }


// ////////////////////////////////////////////////////////////////////////// //
/// initialize OpenGL part of glcmdcon. it is ok to call it with the same dimensions repeatedly.
/// NOT THREAD-SAFE!
public void glconInit (uint ascrwdt, uint ascrhgt, uint ascale=1) {
  if (ascrwdt < 64 || ascrhgt < 64 || ascrwdt > 4096 || ascrhgt > 4096) return;
  if (ascale < 1 || ascale > 64) return;
  conScale = ascale;
  if (scrwdt != ascrwdt || scrhgt != ascrhgt || convbuf is null) {
    scrwdt = ascrwdt;
    scrhgt = ascrhgt;
    //conLastChange = 0;
  }
}


// ////////////////////////////////////////////////////////////////////////// //
/// call this if window was resized. will return `true` if resize was successfull.
/// NOT THREAD-SAFE!
/// can be called instead of `glconInit()`. it is ok to call it with the same dimensions repeatedly.
public void glconResize (uint ascrwdt, uint ascrhgt, uint ascale=1) {
  glconInit(ascrwdt, ascrhgt, ascale); // reallocate back buffer and texture
}


// ////////////////////////////////////////////////////////////////////////// //
__gshared uint* convbuf = null; // RGBA, malloced
__gshared uint convbufTexId = 0;
__gshared uint prevScrWdt = 0, prevScrHgt = 0;
__gshared bool glconRenderFailed = false;


// returns `true` if buffer need to be regenerated
private bool glconGenRenderBuffer () {
  if (glconRenderFailed) return false;
  if (convbuf is null || prevScrWdt != scrwdt || prevScrHgt != scrhgt) {
    import core.stdc.stdlib : free, realloc;
    if (scrhgt == 0) scrhgt = 600;
    // need new buffer; kill old texture, so it will be recreated
    if (glconDrawWindow is null && glconAllowOpenGLRender) {
      if (convbufTexId) { glDeleteTextures(1, &convbufTexId); convbufTexId = 0; }
    }
    auto nbuf = cast(uint*)realloc(convbuf, scrwdt*scrhgt*4);
    if (nbuf is null) {
      if (convbuf !is null) { free(convbuf); convbuf = null; }
      glconRenderFailed = true;
      return false;
    }
    convbuf = nbuf;
    prevScrWdt = scrwdt;
    prevScrHgt = scrhgt;
    convbuf[0..scrwdt*scrhgt] = 0xff000000;
    return true; // buffer updated
  }
  return false; // buffer not updated
}


// returns `true` if texture was recreated
private bool glconGenTexture () {
  if (glconRenderFailed || scrhgt == 0) return false;

  static if (OptCmdConGlHasSdpy) {
    if (glconDrawWindow !is null) return false;
  }

  if (convbufTexId != 0) return false;

  if (!glconAllowOpenGLRender) return false;

  enum wrapOpt = GL_REPEAT;
  enum filterOpt = GL_NEAREST; //GL_LINEAR;
  enum ttype = GL_UNSIGNED_BYTE;

  glGenTextures(1, &convbufTexId);
  if (convbufTexId == 0) {
    import core.stdc.stdlib : free;
    if (convbuf !is null) { free(convbuf); convbuf = null; }
    glconRenderFailed = true;
    return false;
  }

  GLint gltextbinding;
  glGetIntegerv(GL_TEXTURE_BINDING_2D, &gltextbinding);
  scope(exit) glBindTexture(GL_TEXTURE_2D, gltextbinding);

  glBindTexture(GL_TEXTURE_2D, convbufTexId);
  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapOpt);
  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapOpt);
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filterOpt);
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filterOpt);
  //glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
  //glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

  /*
  GLfloat[4] bclr = 0.0;
  glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, bclr.ptr);
  */

  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, nextPOTU32(scrwdt), nextPOTU32(scrhgt), 0, /*GL_RGBA*/GL_BGRA, GL_UNSIGNED_BYTE, null); // this creates texture
  glTexSubImage2D(GL_TEXTURE_2D, 0, 0/*x*/, 0/*y*/, scrwdt, scrhgt, /*GL_RGBA*/GL_BGRA, GL_UNSIGNED_BYTE, convbuf); // this updates texture

  //{ import core.stdc.stdio; printf("glconGenTexture: yep\n"); }
  return true;
}


private void glconCallShowHideHandler () {
  if (rConsoleVisible != rConsoleVisiblePrev) {
    rConsoleVisiblePrev = rConsoleVisible;
    try {
           if (rConsoleVisible) { if (glconOnShow !is null) glconOnShow(); }
      else if (!rConsoleVisible) { if (glconOnHide !is null) glconOnHide(); }
    } catch (Exception) {}
  }
}


// ////////////////////////////////////////////////////////////////////////// //
private int getEffectiveConHeight () {
  if (scrhgt < 1 || rConsoleHeight <= 0) return conCharHeight*3;
  int rchgt = cast(int)(scrhgt*rConsoleHeight);
  if (rchgt > scrhgt-conCharHeight*4) rchgt = scrhgt-conCharHeight*4;
  if (rchgt < conCharHeight*3) rchgt = conCharHeight*3;
  return rchgt;
}


// ////////////////////////////////////////////////////////////////////////// //
/// render console (if it is visible). tries hard to not change OpenGL state.
public void glconDraw () {
  glconCallShowHideHandler();
  if (!rConsoleVisible || scrhgt == 0) return;

  consoleLock();
  scope(exit) consoleUnlock();

  int rchgt = getEffectiveConHeight;

  bool regen = glconGenRenderBuffer();
  if (glconRenderFailed) return; // alas

  assert(convbuf !is null);

  auto updatetex = renderConsole(regen);
  if (glconGenTexture()) updatetex = false;
  if (glconRenderFailed) return; // alas

  static if (OptCmdConGlHasSdpy) {
    if (glconDrawWindow !is null) {
      static if (UsingSimpledisplayX11) {
        // ooops. render to backbuffer
        //{ import core.stdc.stdio; printf("rendering to backbuffer\n"); }
        if (!glconDrawWindow.closed && scrwdt > 0 && scrhgt > 0 && (!glconDrawDirect || !glconDrawWindow.hidden)) {
          XImage ximg;
          //glcon_ximageInitSimple(ximg, scrwdt, scrhgt, convbuf);
          ximg.width = scrwdt;
          ximg.height = scrhgt;
          ximg.xoffset = 0;
          ximg.format = ImageFormat.ZPixmap;
          ximg.data = convbuf;
          ximg.byte_order = 0;
          ximg.bitmap_unit = 32;
          ximg.bitmap_bit_order = 0;
          ximg.bitmap_pad = 8;
          ximg.depth = 24;
          ximg.bytes_per_line = 0;
          ximg.bits_per_pixel = 32; // THIS MATTERS!
          ximg.red_mask = 0x00ff0000;
          ximg.green_mask = 0x0000ff00;
          ximg.blue_mask = 0x000000ff;
          XInitImage(&ximg);
          int desty = rchgt-scrhgt;
          auto dpy = glconDrawWindow.impl.display;
          Drawable drw = (glconDrawDirect ? cast(Drawable)glconDrawWindow.impl.window : cast(Drawable)glconDrawWindow.impl.buffer);
          GC gc = XCreateGC(dpy, drw, 0, null);
          scope(exit) XFreeGC(dpy, gc);
          XCopyGC(dpy, DefaultGC(dpy, DefaultScreen(dpy)), 0xffffffff, gc);
          XSetClipMask(dpy, gc, None);
          XPutImage(dpy, drw, gc, &ximg, 0, 0, 0/*destx*/, desty, scrwdt, scrhgt);
        }
      }
      return;
    }
  }

  if (!glconAllowOpenGLRender) return;
  assert(convbufTexId != 0);

  GLint glmatmode;
  GLint gltextbinding;
  GLint oldprg;
  GLint oldfbr, oldfbw;
  GLint[4] glviewport;
  glGetIntegerv(GL_MATRIX_MODE, &glmatmode);
  glGetIntegerv(GL_TEXTURE_BINDING_2D, &gltextbinding);
  glGetIntegerv(GL_VIEWPORT, glviewport.ptr);
  glGetIntegerv(GL_CURRENT_PROGRAM, &oldprg);
  glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &oldfbr);
  glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &oldfbw);
  glMatrixMode(GL_PROJECTION); glPushMatrix();
  glMatrixMode(GL_MODELVIEW); glPushMatrix();
  glMatrixMode(GL_TEXTURE); glPushMatrix();
  glMatrixMode(GL_COLOR); glPushMatrix();
  glPushAttrib(/*GL_ENABLE_BIT|GL_COLOR_BUFFER_BIT|GL_CURRENT_BIT*/GL_ALL_ATTRIB_BITS); // let's play safe
  // restore on exit
  scope(exit) {
    glPopAttrib(/*GL_ENABLE_BIT*/);
    glMatrixMode(GL_COLOR); glPopMatrix();
    glMatrixMode(GL_TEXTURE); glPopMatrix();
    glMatrixMode(GL_MODELVIEW); glPopMatrix();
    glMatrixMode(GL_PROJECTION); glPopMatrix();
    glMatrixMode(glmatmode);
    if (glHasFunc!"glBindFramebufferEXT") glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, oldfbr);
    if (glHasFunc!"glBindFramebufferEXT") glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, oldfbw);
    glBindTexture(GL_TEXTURE_2D, gltextbinding);
    if (glHasFunc!"glUseProgram") glUseProgram(oldprg);
    glViewport(glviewport.ptr[0], glviewport.ptr[1], glviewport.ptr[2], glviewport.ptr[3]);
  }

  enum x = 0;
  int y = 0;
  int w = scrwdt*conScale;
  int h = scrhgt*conScale;

  immutable float gtx1 = cast(float)scrwdt/nextPOTU32(scrwdt);
  immutable float gty1 = cast(float)scrhgt/nextPOTU32(scrhgt);

  glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
  if (glHasFunc!"glBindFramebufferEXT") glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
  if (glHasFunc!"glUseProgram") glUseProgram(0);

  glMatrixMode(GL_PROJECTION); // for ortho camera
  glLoadIdentity();
  // left, right, bottom, top, near, far
  //glOrtho(0, wdt, 0, hgt, -1, 1); // bottom-to-top
  glOrtho(0, w, h, 0, -1, 1); // top-to-bottom
  glViewport(0, 0, w, h);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();

  glEnable(GL_TEXTURE_2D);
  glDisable(GL_LIGHTING);
  glDisable(GL_DITHER);
  //glDisable(GL_BLEND);
  glDisable(GL_DEPTH_TEST);
  glEnable(GL_BLEND);
  //glBlendFunc(GL_SRC_ALPHA, GL_ONE);
  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  //glDisable(GL_BLEND);
  glDisable(GL_STENCIL_TEST);
  glDisable(GL_SCISSOR_TEST);
  glDisable(GL_CULL_FACE);
  glDisable(GL_POLYGON_OFFSET_FILL);
  glDisable(GL_ALPHA_TEST);
  glDisable(GL_FOG);
  glDisable(GL_COLOR_LOGIC_OP);
  glDisable(GL_INDEX_LOGIC_OP);
  glDisable(GL_POLYGON_SMOOTH);

  glBindTexture(GL_TEXTURE_2D, convbufTexId);
  if (updatetex) {
    //glTextureSubImage2D(convbufTexId, 0, 0/*x*/, 0/*y*/, scrwdt, scrhgt, GL_RGBA, GL_UNSIGNED_BYTE, convbuf);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0/*x*/, 0/*y*/, scrwdt, scrhgt, /*GL_RGBA*/GL_BGRA, GL_UNSIGNED_BYTE, convbuf);
    //{ import core.stdc.stdio; printf("glconDraw: yep (%u)\n", convbufTexId); }
  }

  int ofs = (scrhgt-rchgt)*conScale;
  y -= ofs;
  h -= ofs;
  float alpha = rConAlpha;
  if (alpha < 0) alpha = 0; else if (alpha > 1) alpha = 1;
  glColor4f(1, 1, 1, alpha);
  //scope(exit) glBindTexture(GL_TEXTURE_2D, 0);
  glBegin(GL_QUADS);
    glTexCoord2f(0.0f, 0.0f); glVertex2i(x, y); // top-left
    glTexCoord2f(gtx1, 0.0f); glVertex2i(w, y); // top-right
    glTexCoord2f(gtx1, gty1); glVertex2i(w, h); // bottom-right
    glTexCoord2f(0.0f, gty1); glVertex2i(x, h); // bottom-left
  glEnd();
  //glDisable(GL_BLEND);
}


// ////////////////////////////////////////////////////////////////////////// //
__gshared int conDrawX, conDrawY;
__gshared uint conColor;


void vsetPixel (int x, int y, uint c) nothrow @trusted @nogc {
  pragma(inline, true);
  if (x >= 0 && y >= 0 && x < scrwdt && y < scrhgt) convbuf[y*scrwdt+x] = c;
}


void drawStar (int x0, int y0, int radius) nothrow @trusted @nogc {
  if (radius < 32) return;

  version(none) {
    static void drawLine(bool lastPoint=true) (int x0, int y0, int x1, int y1) nothrow @trusted @nogc {
      enum swap(string a, string b) = "{int tmp_="~a~";"~a~"="~b~";"~b~"=tmp_;}";

      if (x0 == x1 && y0 == y1) {
        static if (lastPoint) vsetPixel(x0, y0, conColor);
        return;
      }

      // clip rectange
      int wx0 = 0, wy0 = 0, wx1 = scrwdt-1, wy1 = scrhgt-1;
      // other vars
      int stx, sty; // "steps" for x and y axes
      int dsx, dsy; // "lengthes" for x and y axes
      int dx2, dy2; // "double lengthes" for x and y axes
      int xd, yd; // current coord
      int e; // "error" (as in bresenham algo)
      int rem;
      int term;
      int *d0, d1;
      // horizontal setup
      if (x0 < x1) {
        // from left to right
        if (x0 > wx1 || x1 < wx0) return; // out of screen
        stx = 1; // going right
      } else {
        // from right to left
        if (x1 > wx1 || x0 < wx0) return; // out of screen
        stx = -1; // going left
        x0 = -x0;
        x1 = -x1;
        wx0 = -wx0;
        wx1 = -wx1;
        mixin(swap!("wx0", "wx1"));
      }
      // vertical setup
      if (y0 < y1) {
        // from top to bottom
        if (y0 > wy1 || y1 < wy0) return; // out of screen
        sty = 1; // going down
      } else {
        // from bottom to top
        if (y1 > wy1 || y0 < wy0) return; // out of screen
        sty = -1; // going up
        y0 = -y0;
        y1 = -y1;
        wy0 = -wy0;
        wy1 = -wy1;
        mixin(swap!("wy0", "wy1"));
      }
      dsx = x1-x0;
      dsy = y1-y0;
      if (dsx < dsy) {
        d0 = &yd;
        d1 = &xd;
        mixin(swap!("x0", "y0"));
        mixin(swap!("x1", "y1"));
        mixin(swap!("dsx", "dsy"));
        mixin(swap!("wx0", "wy0"));
        mixin(swap!("wx1", "wy1"));
        mixin(swap!("stx", "sty"));
      } else {
        d0 = &xd;
        d1 = &yd;
      }
      dx2 = 2*dsx;
      dy2 = 2*dsy;
      xd = x0;
      yd = y0;
      e = 2*dsy-dsx;
      term = x1;
      bool xfixed = false;
      if (y0 < wy0) {
        // clip at top
        int temp = dx2*(wy0-y0)-dsx;
        xd += temp/dy2;
        rem = temp%dy2;
        if (xd > wx1) return; // x is moved out of clipping rect, nothing to do
        if (xd+1 >= wx0) {
          yd = wy0;
          e -= rem+dsx;
          if (rem > 0) { ++xd; e += dy2; }
          xfixed = true;
        }
      }
      if (!xfixed && x0 < wx0) {
        // clip at left
        int temp = dy2*(wx0-x0);
        yd += temp/dx2;
        rem = temp%dx2;
        if (yd > wy1 || yd == wy1 && rem >= dsx) return;
        xd = wx0;
        e += rem;
        if (rem >= dsx) { ++yd; e -= dx2; }
      }
      if (y1 > wy1) {
        // clip at bottom
        int temp = dx2*(wy1-y0)+dsx;
        term = x0+temp/dy2;
        rem = temp%dy2;
        if (rem == 0) --term;
      }
      if (term > wx1) term = wx1; // clip at right
      static if (lastPoint) {
        // draw last point
        ++term;
      } else {
        if (term == xd) return; // this is the only point, get out of here
      }
      if (sty == -1) yd = -yd;
      if (stx == -1) { xd = -xd; term = -term; }
      dx2 -= dy2;
      // draw it; `vsetPixel()` can omit checks
      while (xd != term) {
        vsetPixel(*d0, *d1, conColor);
        // done drawing, move coords
        if (e >= 0) {
          yd += sty;
          e -= dx2;
        } else {
          e += dy2;
        }
        xd += stx;
      }
    }

    static void drawCircle (int cx, int cy, int radius) nothrow @trusted @nogc {
      static void plot4points() (int cx, int cy, int x, int y) nothrow @trusted @nogc {
        vsetPixel(cx+x, cy+y, conColor);
        if (x != 0) vsetPixel(cx-x, cy+y, conColor);
        if (y != 0) vsetPixel(cx+x, cy-y, conColor);
        vsetPixel(cx-x, cy-y, conColor);
      }

      if (radius > 0) {
        int error = -radius, x = radius, y = 0;
        if (radius == 1) { vsetPixel(cx, cy, conColor); return; }
        while (x > y) {
          plot4points(cx, cy, x, y);
          plot4points(cx, cy, y, x);
          error += y*2+1;
          ++y;
          if (error >= 0) { --x; error -= x*2; }
        }
        plot4points(cx, cy, x, y);
      }
    }

    static auto deg2rad(T : double) (T v) pure nothrow @safe @nogc { pragma(inline, true); import std.math : PI; return v*PI/180.0; }

    drawCircle(x0, y0, radius);
    foreach (immutable n; 0..5) {
      import std.math;
      auto a0 = deg2rad(360.0/5*n+18);
      auto a1 = deg2rad(360.0/5*(n+2)+18);
      drawLine(
        cast(uint)(x0+cos(a0)*radius), cast(uint)(y0+sin(a0)*radius),
        cast(uint)(x0+cos(a1)*radius), cast(uint)(y0+sin(a1)*radius),
      );
    }
  } else {
    immutable float scale = (radius*2.0f)/ConBaphometDims;
    //{ import core.stdc.stdio; printf("radius=%d; scale=%g; rr=%g\n", radius, cast(double)scale, cast(double)(512*scale)); }
    conBaphometRender((int x, int y) @trusted => vsetPixel(x+x0-radius, y+y0-radius, conColor), 0, 0, scale);
  }
}


void conSetColor (uint c) nothrow @trusted @nogc {
  pragma(inline, true);
  //conColor = (c&0x00ff00)|((c>>16)&0xff)|((c&0xff)<<16)|0xff000000;
  conColor = c|0xff000000;
}


void conDrawChar (char ch) nothrow @trusted @nogc {
  /*
  int r = conColor&0xff;
  int g = (conColor>>8)&0xff;
  int b = (conColor>>16)&0xff;
  */
  int r = (conColor>>16)&0xff;
  int g = (conColor>>8)&0xff;
  int b = conColor&0xff;
  immutable int rr = r, gg = g, bb = b;
  foreach_reverse (immutable y; 0..10) {
    ushort v = glConFont10.ptr[cast(uint)ch*10+y];
    //immutable uint cc = (b<<16)|(g<<8)|r|0xff000000;
    immutable uint cc = (r<<16)|(g<<8)|b|0xff000000;
    foreach (immutable x; 0..10) {
      if (v&0x8000) vsetPixel(conDrawX+x, conDrawY+y, cc);
      v <<= 1;
    }
    static if (false) {
      if ((r += 8) > 255) r = 255;
      if ((g += 8) > 255) g = 255;
      if ((b += 8) > 255) b = 255;
    } else {
      if ((r -= 7) < 0) r = rr;
      if ((g -= 7) < 0) g = gg;
      if ((b -= 7) < 0) b = bb;
    }
  }
  conDrawX += 10;
}


void conRect (int w, int h) nothrow @trusted @nogc {
  /*
  int r = conColor&0xff;
  int g = (conColor>>8)&0xff;
  int b = (conColor>>16)&0xff;
  */
  int r = (conColor>>16)&0xff;
  int g = (conColor>>8)&0xff;
  int b = conColor&0xff;
  foreach_reverse (immutable y; 0..h) {
    //immutable uint cc = (b<<16)|(g<<8)|r|0xff000000;
    immutable uint cc = (r<<16)|(g<<8)|b|0xff000000;
    foreach (immutable x; conDrawX..conDrawX+w) vsetPixel(x, conDrawY+y, cc);
    if ((r -= 8) < 0) r = 0;
    if ((g -= 8) < 0) g = 0;
    if ((b -= 8) < 0) b = 0;
  }
}


// ////////////////////////////////////////////////////////////////////////// //
__gshared uint conLastChange = 0;
__gshared uint conLastIBChange = 0;
__gshared int prevCurX = -1;
__gshared int prevIXOfs = 0;


bool renderConsole (bool forced) nothrow @trusted @nogc {
  if (!forced && (conLastChange == cbufLastChange && conLastIBChange == conInputLastChange) || scrhgt == 0) return false;

  enum XOfs = 0;
  immutable sw = scrwdt, sh = scrhgt;
  int skipLines = conskiplines;
  convbuf[0..sw*sh] = 0xff000000;
  conLastChange = cbufLastChange;
  conLastIBChange = conInputLastChange;
  if (sw >= 128 && sh >= 128) {
    import std.algorithm : min;
    conSetColor(rConStarColor);
    int radius = min(sw, sh)/3;
    //{ import core.stdc.stdio; printf("sw=%d; sh=%d; radius=%d\n", sw, sh, radius); }
    drawStar(sw/2, /*sh/2*/sh-radius-16, radius);
  }

  auto concli = conInputBuffer;
  int conclilen = cast(int)concli.length;
  int concurx = conInputBufferCurX();

  int y = sh-conCharHeight;
  // draw command line
  {
    conDrawX = XOfs;
    conDrawY = y;
    int charsInLine = (sw-XOfs*2)/conCharWidth-1; // reserve room for cursor
    if (rPromptChar >= ' ') --charsInLine;
    if (charsInLine < 2) charsInLine = 2; // just in case
    int stpos = prevIXOfs;
    if (concurx == conclilen) {
      stpos = conclilen-charsInLine;
      prevCurX = concurx;
    } else if (prevCurX != concurx) {
      // cursor position changed, fix x offset
      if (concurx <= prevIXOfs) {
        stpos = concurx-1;
      } else if (concurx-prevIXOfs >= charsInLine-1) {
        stpos = concurx-charsInLine+1;
      }
    }
    if (stpos < 0) stpos = 0;
    prevCurX = concurx;
    prevIXOfs = stpos;

    if (rPromptChar >= ' ') {
      conSetColor(rConPromptColor);
      conDrawChar(rPromptChar);
    }
    conSetColor(rConInputColor);
    version(none) {
      foreach (int pos; stpos..stpos+charsInLine+1) {
        if (pos < concurx) {
          if (pos < conclilen) conDrawChar(concli.ptr[pos]);
        } else if (pos == concurx) {
          conSetColor(rConCursorColor);
          conRect(conCharWidth, conCharHeight);
          conDrawX += conCharWidth;
          conSetColor(rConInputColor);
        } else if (pos-1 < conclilen) {
          conDrawChar(concli.ptr[pos-1]);
        }
      }
    } else {
      foreach (int pos; stpos..stpos+charsInLine+1) {
        if (pos == concurx) {
          conSetColor(rConCursorColor);
          conRect(conCharWidth, conCharHeight);
          conSetColor(rConInputColor);
        }
        if (pos >= 0 && pos < conclilen) conDrawChar(concli.ptr[pos]);
      }
    }
    y -= conCharHeight;
  }

  // draw console text
  conSetColor(rConTextColor);
  conDrawX = XOfs;
  conDrawY = y;

  void putLine(T) (auto ref T line, usize pos=0) {
    if (y+conCharHeight <= 0 || pos >= line.length) return;
    int w = XOfs, lastWordW = -1;
    usize sp = pos, lastWordEnd = 0;
    while (sp < line.length) {
      char ch = line[sp++];
      enum cw = conCharWidth;
      // remember last word position
      if (/*lastWordW < 0 &&*/ (ch == ' ' || ch == '\t')) {
        lastWordEnd = sp-1; // space will be put on next line (rough indication of line wrapping)
        lastWordW = w;
      }
      if ((w += cw) > sw-XOfs*2) {
        w -= cw;
        --sp;
        // current char is non-space, and, previous char is non-space, and we have a complete word?
        if (lastWordW > 0 && ch != ' ' && ch != '\t' && sp > pos && line[sp-1] != ' ' && line[sp-1] != '\t') {
          // yes, split on last word boundary
          sp = lastWordEnd;
        }
        break;
      }
    }
    if (sp < line.length) putLine(line, sp); // recursive put tail
    // draw line
    if (skipLines-- <= 0) {
      while (pos < sp) conDrawChar(line[pos++]);
      y -= conCharHeight;
      conDrawX = XOfs;
      conDrawY = y;
    }
  }

  {
    consoleWriteLock();
    scope(exit) consoleWriteUnlock();
    foreach (/*auto*/ line; conbufLinesRev) {
      putLine(line);
      if (y+conCharHeight <= 0) break;
    }
  }

  return true;
}


// ////////////////////////////////////////////////////////////////////////// //
static if (OptCmdConGlHasSdpy) {
import arsd.simpledisplay : KeyEvent, MouseEvent, Key, ModifierState, SimpleWindow;
version(Posix) {
  import arsd.simpledisplay : Pixmap, XImage, XDisplay, Visual, XPutImage, ImageFormat, Drawable, Status, XInitImage;
  import arsd.simpledisplay : GC, XCreateGC, XFreeGC, XCopyGC, XSetClipMask, DefaultGC, DefaultScreen, None;
}

//public __gshared string glconShowKey = "M-Grave"; /// this key will be eaten
public __gshared string glconShowKey = "F12"; /// this key will be eaten

shared static this () {
  conRegVar!glconShowKey("c_togglekey", "console toggle key name");
}


/// process keyboard event. returns `true` if event was eaten.
public bool glconKeyEvent (KeyEvent event) {
  import arsd.simpledisplay;
  // ketmar's special
  if (event.key == 269025053) {
    if (event.pressed) concmd("r_console toggle");
    return true;
  }
  // others
  if (!rConsoleVisible) {
    if (event == glconShowKey) {
      if (event.pressed) concmd("r_console 1");
      return true;
    }
    return false;
  }
  if (!event.pressed) return true;
  if (event == glconShowKey) {
    if (glconShowKey.length == 1 && glconShowKey[0] >= ' ' && glconShowKey[0] < 128) {
      if (conInputBuffer.length == 0) concmd("r_console 0");
    } else if (glconShowKey == "Grave") {
      if (conInputBuffer.length == 0) concmd("r_console 0");
    } else {
      concmd("r_console 0");
    }
    return true;
  }
  if (event.key == Key.Escape) { concmd("r_console 0"); return true; }
  switch (event.key) {
    case Key.Up:
      if (event.modifierState&ModifierState.alt) {
        glconCharInput(ConInputChar.LineUp);
      } else {
        glconCharInput(ConInputChar.Up);
      }
      return true;
    case Key.Down:
      if (event.modifierState&ModifierState.alt) {
        glconCharInput(ConInputChar.LineDown);
      } else {
        glconCharInput(ConInputChar.Down);
      }
      return true;
    case Key.Left: glconCharInput(ConInputChar.Left); return true;
    case Key.Right: glconCharInput(ConInputChar.Right); return true;
    case Key.Home: glconCharInput(ConInputChar.Home); return true;
    case Key.End: glconCharInput(ConInputChar.End); return true;
    case Key.PageUp:
      if (event.modifierState&ModifierState.alt) {
        glconCharInput(ConInputChar.LineUp);
      } else {
        glconCharInput(ConInputChar.PageUp);
      }
      return true;
    case Key.PageDown:
      if (event.modifierState&ModifierState.alt) {
        glconCharInput(ConInputChar.LineDown);
      } else {
        glconCharInput(ConInputChar.PageDown);
      }
      return true;
    case Key.Backspace: glconCharInput(ConInputChar.Backspace); return true;
    case Key.Tab: glconCharInput(ConInputChar.Tab); return true;
    case Key.Enter: glconCharInput(ConInputChar.Enter); return true;
    case Key.Delete: glconCharInput(ConInputChar.Delete); return true;
    case Key.Insert: glconCharInput(ConInputChar.Insert); return true;
    case Key.W: if (event.modifierState&ModifierState.ctrl) glconCharInput(ConInputChar.CtrlW); return true;
    case Key.Y: if (event.modifierState&ModifierState.ctrl) glconCharInput(ConInputChar.CtrlY); return true;
    default:
  }
  return true;
}


/// process character event. returns `true` if event was eaten.
public bool glconCharEvent (dchar ch) {
  if (!rConsoleVisible) {
    if (glconShowKey.length == 1 && glconShowKey[0] >= ' ' && glconShowKey[0] < 128) {
      if (ch == glconShowKey[0]) return true;
      if (ch == '`' && glconShowKey == "Grave" && conInputBuffer.length == 0) return true; // HACK!
      if (glconShowKey[0] >= 'A' && glconShowKey[0] <= 'Z' && ch >= 'a' && ch <= 'z' && glconShowKey[0] == ch-32) return true;
    }
    return false;
  }
  if (glconShowKey.length == 1 && glconShowKey[0] >= ' ' && glconShowKey[0] < 128 && ch == glconShowKey[0] && conInputBuffer.length == 0) return true; // HACK!
  if (ch == '`' && glconShowKey == "Grave" && conInputBuffer.length == 0) return true; // HACK!
  if (ch >= ' ' && ch < 127) glconCharInput(cast(char)ch);
  return true;
}


/// call this in GLConDoConsoleCommandsEvent handler
public void glconProcessEventMessage () {
  bool sendAnother = false;
  bool wasCommands = false;
  bool prevVisible = isConsoleVisible;
  {
    consoleLock();
    scope(exit) consoleUnlock();
    wasCommands = conQueueEmpty();
  }
  conProcessQueue();
  {
    consoleLock();
    scope(exit) consoleUnlock();
    sendAnother = !conQueueEmpty();
  }
  if (glconCtlWindow is null || glconCtlWindow.closed) return;
  if (sendAnother) glconPostDoConCommands();
  glconCallShowHideHandler();
  if (wasCommands || prevVisible || isConsoleVisible) glconPostScreenRepaint();
}


public class GLConScreenRepaintEvent {} ///
public class GLConDoConsoleCommandsEvent {} ///

__gshared GLConScreenRepaintEvent evScreenRepaint;
__gshared GLConDoConsoleCommandsEvent evDoConCommands;
public __gshared SimpleWindow glconCtlWindow; /// this window will be used to send messages
public __gshared SimpleWindow glconDrawWindow; /// if `null`, OpenGL will be used
public __gshared bool glconDrawDirect = false; /// if `true`, draw directly to glconDrawWindow, else to it's backbuffer

shared static this () {
  evScreenRepaint = new GLConScreenRepaintEvent();
  evDoConCommands = new GLConDoConsoleCommandsEvent();
  //__gshared oldccb = conInputChangedCB;
  conInputChangedCB = delegate () nothrow @trusted {
    try {
      glconPostScreenRepaint();
    } catch (Exception e) {}
    //if (oldccb !is null) oldccb();
  };
}

///
public void glconPostScreenRepaint () {
  if (glconCtlWindow !is null && !glconCtlWindow.eventQueued!GLConScreenRepaintEvent) glconCtlWindow.postEvent(evScreenRepaint);
}

///
public void glconPostScreenRepaintDelayed (int tout=35) {
  if (glconCtlWindow !is null && !glconCtlWindow.eventQueued!GLConScreenRepaintEvent) glconCtlWindow.postTimeout(evScreenRepaint, (tout < 0 ? 0 : tout));
}

///
public void glconPostDoConCommands(bool checkempty=false) () {
  static if (checkempty) {
    {
      consoleLock();
      scope(exit) consoleUnlock();
      if (conQueueEmpty()) return;
    }
  }
  if (glconCtlWindow !is null && !glconCtlWindow.eventQueued!GLConDoConsoleCommandsEvent) glconCtlWindow.postEvent(evDoConCommands);
}


// ////////////////////////////////////////////////////////////////////////// //
public __gshared bool glconTranslateKeypad = true; /// translate keypad keys to "normal" keys?
public __gshared bool glconTranslateMods = true; /// translate right modifiers "normal" modifiers?
public __gshared bool glconNoMouseEventsWhenConsoleIsVisible = true; ///

public __gshared void delegate () oglSetupDG; /// called when window will become visible for the first time
public __gshared bool delegate () closeQueryDG; /// called when window will going to be closed; return `false` to prevent closing
public __gshared void delegate () redrawFrameDG; /// frame need to be redrawn (but not rebuilt)
public __gshared void delegate () nextFrameDG; /// frame need to be rebuilt (but not redrawn); won't be used for FPS == 0
public __gshared void delegate (KeyEvent event) keyEventDG; ///
public __gshared void delegate (MouseEvent event) mouseEventDG; ///
public __gshared void delegate (dchar ch) charEventDG; ///
public __gshared void delegate (int wdt, int hgt) resizeEventDG; ///
public __gshared void delegate (bool focused) focusEventDG; ///


// ////////////////////////////////////////////////////////////////////////// //
private void glconRunGLWindowInternal (int wdt, int hgt, string title, string klass, bool resizeable) {
  import arsd.simpledisplay : sdpyWindowClass, OpenGlOptions, Resizability, flushGui;
  if (klass !is null) sdpyWindowClass = klass;
  auto sdwin = new SimpleWindow(wdt, hgt, title, OpenGlOptions.yes, (resizeable ? Resizability.allowResizing : Resizability.fixedSize));
  glconSetupForGLWindow(sdwin);
  sdwin.eventLoop(0);
  flushGui();
  conProcessQueue(int.max/4);
}


// ////////////////////////////////////////////////////////////////////////// //
/// create window and run event loop. use this after you set all the required *DG delegates.
public void glconRunGLWindow (int wdt, int hgt, string title, string klass=null) {
  glconRunGLWindowInternal(wdt, hgt, title, klass, false);
}

/// ditto.
public void glconRunGLWindowResizeable (int wdt, int hgt, string title, string klass=null) {
  glconRunGLWindowInternal(wdt, hgt, title, klass, true);
}


// ////////////////////////////////////////////////////////////////////////// //
private __gshared int glconFPS = 30; // 0 means "render on demand"
private __gshared double nextFrameTime = 0; // in msecs


/// <=0 means "render on demand" (i.e. never automatically invoke `glconPostNextFrame()`)
/// this will automatically seal "r_fps" convar
/// note that you cannot set FPS to 0 with "r_fps" console variable
public void glconSetAndSealFPS (int fps) {
  if (fps < 0) fps = 0; else if (fps > 200) fps = 200;
  glconFPS = fps;
  conSealVar("r_fps");
}


private final class NextFrameEvent {}
private __gshared NextFrameEvent eventNextFrame;
private shared static this () {
  eventNextFrame = new NextFrameEvent();
  conRegVar!glconFPS(1, 200, "r_fps", "frames per second (affects both rendering and processing)");
  // use `conSealVar("r_fps")` to seal it
}


/// call this to reset frame timer, and immediately post "rebuild frame" event if FPS > 0
/// will post repaint event if FPS == 0
/// called automatically when window is shown, if `glconSetupForGLWindow()` is used
public void glconResetNextFrame () {
  nextFrameTime = 0;
  if (glconFPS <= 0) {
    glconPostScreenRepaint();
  } else {
    glconPostNextFrame();
  }
}

/// called automatically if FPS is > 0
/// noop if FPS == 0
public void glconPostNextFrame () {
  import iv.pxclock;
  if (glconFPS > 0) {
    if (glconCtlWindow.eventQueued!NextFrameEvent) return;
    ulong nft = cast(ulong)nextFrameTime;
    auto ctime = clockMilli();
    if (nft > 0 && nft > ctime) {
      glconCtlWindow.postTimeout(eventNextFrame, cast(uint)(nft-ctime));
    } else {
      // next frame time is either now, or passed
      int fps = glconFPS;
      if (fps < 1) fps = 1;
      if (fps > 200) fps = 200;
      if (nft <= 0) nextFrameTime = ctime;
      nextFrameTime += 1000.0/fps;
      nft = cast(ulong)nextFrameTime;
      if (nft <= ctime) {
        nextFrameTime = ctime; // too much time passed, reset timer
        glconCtlWindow.postTimeout(eventNextFrame, 0);
      } else {
        glconCtlWindow.postTimeout(eventNextFrame, cast(uint)(nft-ctime));
      }
    }
  }
}

/** use this after you set all the necessary *DG handlers, like this:
 *
 * ------
 * sdpyWindowClass = "SDPY WINDOW";
 * auto sdwin = new SimpleWindow(VBufWidth, VBufHeight, "My D App", OpenGlOptions.yes, Resizability.allowResizing);
 * //sdwin.hideCursor();
 * glconSetupForGLWindow(sdwin);
 * sdwin.eventLoop(0);
 * flushGui();
 * conProcessQueue(int.max/4);
 * ------
 */
public void glconSetupForGLWindow (SimpleWindow w) {
  if (glconCtlWindow !is null) {
    if (w !is glconCtlWindow) throw new Exception("glconSetupForGLWindow() was already called for another window");
    return;
  }

  glconCtlWindow = w;
  if (w is null) return;

  static if (is(typeof(&glconCtlWindow.closeQuery))) {
    glconCtlWindow.closeQuery = delegate () {
      if (closeQueryDG !is null && !closeQueryDG()) return;
      concmd("quit");
      glconPostDoConCommands();
    };
  }

  glconCtlWindow.visibleForTheFirstTime = delegate () {
    import iv.glbinds;
    glconCtlWindow.setAsCurrentOpenGlContext(); // make this window active

    glconInit(glconCtlWindow.width, glconCtlWindow.height);
    if (oglSetupDG !is null) oglSetupDG();

    if (glconFPS > 0) glconResetNextFrame();
  };

  glconCtlWindow.addEventListener((NextFrameEvent evt) {
    glconPostDoConCommands!true();
    if (glconCtlWindow.closed) return;
    if (isQuitRequested) { glconCtlWindow.close(); return; }
    if (glconFPS > 0 && nextFrameDG !is null) nextFrameDG();
    glconCtlWindow.redrawOpenGlSceneNow();
    if (glconFPS > 0) glconPostNextFrame();
  });

  glconCtlWindow.addEventListener((GLConScreenRepaintEvent evt) {
    if (glconCtlWindow.closed) return;
    if (isQuitRequested) { glconCtlWindow.close(); return; }
    glconCtlWindow.redrawOpenGlSceneNow();
  });

  glconCtlWindow.addEventListener((GLConDoConsoleCommandsEvent evt) {
    glconProcessEventMessage();
  });

  glconCtlWindow.windowResized = delegate (int wdt, int hgt) {
    if (glconCtlWindow.closed) return;
    glconResize(wdt, hgt);
    glconPostScreenRepaint/*Delayed*/();
    if (resizeEventDG !is null) resizeEventDG(wdt, hgt);
  };

  glconCtlWindow.onFocusChange = delegate (bool focused) {
    if (glconCtlWindow.closed) return;
    if (focusEventDG !is null) focusEventDG(focused);
  };

  glconCtlWindow.redrawOpenGlScene = delegate () {
    glconPostDoConCommands!true();
    if (glconCtlWindow.closed) return;
    // draw main screen
    if (redrawFrameDG !is null) redrawFrameDG();
    glconDraw();
  };

  glconCtlWindow.handleKeyEvent = delegate (KeyEvent event) {
    scope(exit) glconPostDoConCommands!true();
    if (glconCtlWindow.closed) return;
    if (isQuitRequested) { glconCtlWindow.close(); return; }
    if (glconKeyEvent(event)) { glconPostScreenRepaint(); return; }

    if (keyEventDG is null) return;

    if (glconTranslateMods) {
      switch (event.key) {
        case Key.Ctrl_r: event.key = Key.Ctrl; break;
        case Key.Shift_r: event.key = Key.Shift; break;
        case Key.Alt_r: event.key = Key.Alt; break;
        case Key.Windows_r: event.key = Key.Windows; break;
        default:
      }
    }
    if (glconTranslateKeypad) {
      if ((event.modifierState&ModifierState.numLock) == 0) {
        switch (event.key) {
          case Key.PadEnter: event.key = Key.Enter; break;
          case Key.Pad1: event.key = Key.End; break;
          case Key.Pad2: event.key = Key.Down; break;
          case Key.Pad3: event.key = Key.PageDown; break;
          case Key.Pad4: event.key = Key.Left; break;
          //case Key.Pad5: event.key = Key.; break;
          case Key.Pad6: event.key = Key.Right; break;
          case Key.Pad7: event.key = Key.Home; break;
          case Key.Pad8: event.key = Key.Up; break;
          case Key.Pad9: event.key = Key.PageUp; break;
          case Key.Pad0: event.key = Key.Insert; break;
          default:
        }
      }
    }
    keyEventDG(event);
  };

  glconCtlWindow.handleMouseEvent = delegate (MouseEvent event) {
    scope(exit) glconPostDoConCommands!true();
    if (glconCtlWindow.closed) return;
    if (rConsoleVisible && glconNoMouseEventsWhenConsoleIsVisible) return;
    if (mouseEventDG !is null) mouseEventDG(event);
  };

  glconCtlWindow.handleCharEvent = delegate (dchar ch) {
    scope(exit) glconPostDoConCommands!true();
    if (glconCtlWindow.closed) return;
    if (glconCharEvent(ch)) { glconPostScreenRepaint(); return; }
    if (charEventDG !is null) charEventDG(ch);
  };
}
}


// ////////////////////////////////////////////////////////////////////////// //
static public immutable ushort[256*10] glConFont10 = [
0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x3f00,0x4080,0x5280,0x4080,0x5e80,0x4c80,0x2100,0x1e00,
0x0000,0x0000,0x3f00,0x7f80,0x6d80,0x7f80,0x6180,0x7380,0x3f00,0x1e00,0x0000,0x0000,0x3b80,0x7fc0,0x7fc0,0x7fc0,0x3f80,0x1f00,0x0e00,
0x0400,0x0000,0x0400,0x0e00,0x1f00,0x3f80,0x7fc0,0x3f80,0x1f00,0x0e00,0x0400,0x0000,0x0000,0x0e00,0x1f00,0x0e00,0x3f80,0x7fc0,0x3580,
0x0400,0x0e00,0x0000,0x0400,0x0e00,0x1f00,0x3f80,0x7fc0,0x7fc0,0x3580,0x0400,0x0e00,0x0000,0x0000,0x0000,0x0000,0x0c00,0x1e00,0x1e00,
0x0c00,0x0000,0x0000,0x0000,0xffc0,0xffc0,0xffc0,0xf3c0,0xe1c0,0xe1c0,0xf3c0,0xffc0,0xffc0,0xffc0,0x0000,0x0000,0x1e00,0x3300,0x2100,
0x2100,0x3300,0x1e00,0x0000,0x0000,0xffc0,0xffc0,0xe1c0,0xccc0,0xdec0,0xdec0,0xccc0,0xe1c0,0xffc0,0xffc0,0x0000,0x0780,0x0380,0x0780,
0x3e80,0x6600,0x6600,0x6600,0x3c00,0x0000,0x0000,0x1e00,0x3300,0x3300,0x3300,0x1e00,0x0c00,0x3f00,0x0c00,0x0000,0x0400,0x0600,0x0700,
0x0500,0x0500,0x0400,0x1c00,0x3c00,0x1800,0x0000,0x0000,0x1f80,0x1f80,0x1080,0x1080,0x1180,0x3380,0x7100,0x2000,0x0000,0x0000,0x0c00,
0x6d80,0x1e00,0x7380,0x7380,0x1e00,0x6d80,0x0c00,0x0000,0x1000,0x1800,0x1c00,0x1e00,0x1f00,0x1e00,0x1c00,0x1800,0x1000,0x0000,0x0100,
0x0300,0x0700,0x0f00,0x1f00,0x0f00,0x0700,0x0300,0x0100,0x0000,0x0000,0x0c00,0x1e00,0x3f00,0x0c00,0x0c00,0x3f00,0x1e00,0x0c00,0x0000,
0x0000,0x3300,0x3300,0x3300,0x3300,0x3300,0x0000,0x3300,0x0000,0x0000,0x0000,0x3f80,0x6d80,0x6d80,0x3d80,0x0d80,0x0d80,0x0d80,0x0000,
0x0000,0x0000,0x1f00,0x3000,0x1f00,0x3180,0x1f00,0x0180,0x1f00,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x7f80,0x7f80,0x7f80,
0x0000,0x0000,0x0000,0x0c00,0x1e00,0x3f00,0x0c00,0x0c00,0x3f00,0x1e00,0x0c00,0xffc0,0x0000,0x0c00,0x1e00,0x3f00,0x0c00,0x0c00,0x0c00,
0x0c00,0x0c00,0x0000,0x0000,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x3f00,0x1e00,0x0c00,0x0000,0x0000,0x0000,0x0600,0x0300,0x7f80,0x0300,
0x0600,0x0000,0x0000,0x0000,0x0000,0x0000,0x1800,0x3000,0x7f80,0x3000,0x1800,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x6000,
0x6000,0x6000,0x7f80,0x0000,0x0000,0x0000,0x0000,0x1100,0x3180,0x7fc0,0x3180,0x1100,0x0000,0x0000,0x0000,0x0000,0x0000,0x0400,0x0e00,
0x1f00,0x3f80,0x7fc0,0x0000,0x0000,0x0000,0x0000,0x0000,0x7fc0,0x3f80,0x1f00,0x0e00,0x0400,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0c00,0x1e00,0x1e00,0x0c00,0x0c00,0x0000,0x0c00,0x0000,0x0000,0x0000,0x1b00,
0x1b00,0x1b00,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x1b00,0x1b00,0x7fc0,0x1b00,0x7fc0,0x1b00,0x1b00,0x0000,0x0000,0x0400,
0x1f00,0x3580,0x3400,0x1f00,0x0580,0x3580,0x1f00,0x0400,0x0000,0x0000,0x3180,0x3300,0x0600,0x0c00,0x1980,0x3180,0x0000,0x0000,0x0000,
0x0000,0x1c00,0x3300,0x3300,0x1f80,0x3300,0x3300,0x1d80,0x0000,0x0000,0x0000,0x0e00,0x0c00,0x1800,0x0000,0x0000,0x0000,0x0000,0x0000,
0x0000,0x0000,0x0600,0x0c00,0x1800,0x1800,0x1800,0x0c00,0x0600,0x0000,0x0000,0x0000,0x1800,0x0c00,0x0600,0x0600,0x0600,0x0c00,0x1800,
0x0000,0x0000,0x0000,0x0000,0x3300,0x1e00,0x7f80,0x1e00,0x3300,0x0000,0x0000,0x0000,0x0000,0x0000,0x0c00,0x0c00,0x3f00,0x0c00,0x0c00,
0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0c00,0x0c00,0x1800,0x0000,0x0000,0x0000,0x0000,0x0000,0x3f00,0x0000,
0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0c00,0x0c00,0x0000,0x0000,0x0000,0x0180,0x0300,0x0600,0x0c00,
0x1800,0x3000,0x6000,0x0000,0x0000,0x0000,0x1f00,0x3380,0x3780,0x3f80,0x3d80,0x3980,0x1f00,0x0000,0x0000,0x0000,0x0c00,0x1c00,0x0c00,
0x0c00,0x0c00,0x0c00,0x3f00,0x0000,0x0000,0x0000,0x1f00,0x3180,0x0180,0x0f00,0x1800,0x3180,0x3f80,0x0000,0x0000,0x0000,0x1f00,0x3180,
0x0180,0x0700,0x0180,0x3180,0x1f00,0x0000,0x0000,0x0000,0x0700,0x0f00,0x1b00,0x3300,0x3f80,0x0300,0x0780,0x0000,0x0000,0x0000,0x3f80,
0x3000,0x3000,0x3f00,0x0180,0x3180,0x1f00,0x0000,0x0000,0x0000,0x0f00,0x1800,0x3000,0x3f00,0x3180,0x3180,0x1f00,0x0000,0x0000,0x0000,
0x3f80,0x3180,0x0180,0x0300,0x0600,0x0c00,0x0c00,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3180,0x1f00,0x3180,0x3180,0x1f00,0x0000,0x0000,
0x0000,0x1f00,0x3180,0x3180,0x1f80,0x0180,0x0300,0x1e00,0x0000,0x0000,0x0000,0x0000,0x0c00,0x0c00,0x0000,0x0000,0x0c00,0x0c00,0x0000,
0x0000,0x0000,0x0000,0x0c00,0x0c00,0x0000,0x0000,0x0c00,0x0c00,0x1800,0x0000,0x0000,0x0300,0x0600,0x0c00,0x1800,0x0c00,0x0600,0x0300,
0x0000,0x0000,0x0000,0x0000,0x0000,0x3f00,0x0000,0x3f00,0x0000,0x0000,0x0000,0x0000,0x0000,0x1800,0x0c00,0x0600,0x0300,0x0600,0x0c00,
0x1800,0x0000,0x0000,0x0000,0x1e00,0x3300,0x0300,0x0300,0x0600,0x0c00,0x0000,0x0c00,0x0000,0x0000,0x3f00,0x6180,0x6780,0x6d80,0x6780,
0x6000,0x3f00,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3180,0x3f80,0x3180,0x3180,0x3180,0x0000,0x0000,0x0000,0x3f00,0x3180,0x3180,0x3f00,
0x3180,0x3180,0x3f00,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3000,0x3000,0x3000,0x3180,0x1f00,0x0000,0x0000,0x0000,0x3e00,0x3300,0x3180,
0x3180,0x3180,0x3300,0x3e00,0x0000,0x0000,0x0000,0x3f80,0x3000,0x3000,0x3f00,0x3000,0x3000,0x3f80,0x0000,0x0000,0x0000,0x3f80,0x3000,
0x3000,0x3f00,0x3000,0x3000,0x3000,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3000,0x3380,0x3180,0x3180,0x1f00,0x0000,0x0000,0x0000,0x3180,
0x3180,0x3180,0x3f80,0x3180,0x3180,0x3180,0x0000,0x0000,0x0000,0x1e00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x1e00,0x0000,0x0000,0x0000,
0x0700,0x0300,0x0300,0x0300,0x3300,0x3300,0x1e00,0x0000,0x0000,0x0000,0x3180,0x3180,0x3300,0x3e00,0x3300,0x3180,0x3180,0x0000,0x0000,
0x0000,0x3000,0x3000,0x3000,0x3000,0x3000,0x3000,0x3f80,0x0000,0x0000,0x0000,0x6180,0x7380,0x7f80,0x6d80,0x6180,0x6180,0x6180,0x0000,
0x0000,0x0000,0x3180,0x3980,0x3d80,0x3780,0x3380,0x3180,0x3180,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3180,0x3180,0x3180,0x3180,0x1f00,
0x0000,0x0000,0x0000,0x3f00,0x3180,0x3180,0x3f00,0x3000,0x3000,0x3000,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3180,0x3180,0x3180,0x3380,
0x1f00,0x0380,0x0000,0x0000,0x3f00,0x3180,0x3180,0x3f00,0x3300,0x3180,0x3180,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3000,0x1f00,0x0180,
0x3180,0x1f00,0x0000,0x0000,0x0000,0x7f80,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0000,0x0000,0x0000,0x3180,0x3180,0x3180,0x3180,
0x3180,0x3180,0x1f00,0x0000,0x0000,0x0000,0x3180,0x3180,0x3180,0x3180,0x1b00,0x0e00,0x0400,0x0000,0x0000,0x0000,0x6180,0x6180,0x6180,
0x6d80,0x7f80,0x7380,0x6180,0x0000,0x0000,0x0000,0x6180,0x3300,0x1e00,0x0c00,0x1e00,0x3300,0x6180,0x0000,0x0000,0x0000,0x6180,0x6180,
0x3300,0x1e00,0x0c00,0x0c00,0x0c00,0x0000,0x0000,0x0000,0x3f80,0x0300,0x0600,0x0c00,0x1800,0x3000,0x3f80,0x0000,0x0000,0x0000,0x1e00,
0x1800,0x1800,0x1800,0x1800,0x1800,0x1e00,0x0000,0x0000,0x0000,0x6000,0x3000,0x1800,0x0c00,0x0600,0x0300,0x0000,0x0000,0x0000,0x0000,
0x1e00,0x0600,0x0600,0x0600,0x0600,0x0600,0x1e00,0x0000,0x0000,0x0000,0x0400,0x0e00,0x1b00,0x3180,0x0000,0x0000,0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0xffc0,0x0000,0x0000,0x1c00,0x0c00,0x0600,0x0000,0x0000,0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,0x0000,0x1f00,0x0180,0x1f80,0x3180,0x1f80,0x0000,0x0000,0x0000,0x3000,0x3000,0x3f00,0x3180,0x3180,0x3180,0x3f00,
0x0000,0x0000,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3000,0x3180,0x1f00,0x0000,0x0000,0x0000,0x0180,0x0180,0x1f80,0x3180,0x3180,0x3180,
0x1f80,0x0000,0x0000,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3f80,0x3000,0x1f00,0x0000,0x0000,0x0000,0x0f00,0x1800,0x1800,0x3e00,0x1800,
0x1800,0x1800,0x0000,0x0000,0x0000,0x0000,0x0000,0x1f80,0x3180,0x3180,0x3180,0x1f80,0x0180,0x1f00,0x0000,0x3000,0x3000,0x3f00,0x3180,
0x3180,0x3180,0x3180,0x0000,0x0000,0x0000,0x0c00,0x0000,0x1c00,0x0c00,0x0c00,0x0c00,0x1e00,0x0000,0x0000,0x0000,0x0600,0x0000,0x0e00,
0x0600,0x0600,0x0600,0x0600,0x0600,0x1c00,0x0000,0x3000,0x3000,0x3180,0x3300,0x3e00,0x3300,0x3180,0x0000,0x0000,0x0000,0x1c00,0x0c00,
0x0c00,0x0c00,0x0c00,0x0c00,0x0700,0x0000,0x0000,0x0000,0x0000,0x0000,0x3300,0x7f80,0x6d80,0x6d80,0x6180,0x0000,0x0000,0x0000,0x0000,
0x0000,0x3f00,0x3180,0x3180,0x3180,0x3180,0x0000,0x0000,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3180,0x3180,0x1f00,0x0000,0x0000,0x0000,
0x0000,0x0000,0x3f00,0x3180,0x3180,0x3f00,0x3000,0x3000,0x0000,0x0000,0x0000,0x0000,0x1f80,0x3180,0x3180,0x1f80,0x0180,0x01c0,0x0000,
0x0000,0x0000,0x0000,0x3f00,0x3180,0x3000,0x3000,0x3000,0x0000,0x0000,0x0000,0x0000,0x0000,0x1f80,0x3000,0x1f00,0x0180,0x3f00,0x0000,
0x0000,0x0000,0x1800,0x1800,0x3e00,0x1800,0x1800,0x1800,0x0f00,0x0000,0x0000,0x0000,0x0000,0x0000,0x3180,0x3180,0x3180,0x3180,0x1f80,
0x0000,0x0000,0x0000,0x0000,0x0000,0x3180,0x3180,0x1b00,0x0e00,0x0400,0x0000,0x0000,0x0000,0x0000,0x0000,0x6180,0x6d80,0x6d80,0x7f80,
0x3300,0x0000,0x0000,0x0000,0x0000,0x0000,0x3180,0x1b00,0x0e00,0x1b00,0x3180,0x0000,0x0000,0x0000,0x0000,0x0000,0x3180,0x3180,0x3180,
0x1f80,0x0180,0x1f00,0x0000,0x0000,0x0000,0x0000,0x3f00,0x0600,0x0c00,0x1800,0x3f00,0x0000,0x0000,0x0000,0x0e00,0x1800,0x1800,0x3000,
0x1800,0x1800,0x0e00,0x0000,0x0000,0x0c00,0x0c00,0x0c00,0x0c00,0x0000,0x0c00,0x0c00,0x0c00,0x0c00,0x0000,0x0000,0x1c00,0x0600,0x0600,
0x0300,0x0600,0x0600,0x1c00,0x0000,0x0000,0x0000,0x0000,0x0000,0x3800,0x6d80,0x0700,0x0000,0x0000,0x0000,0x0000,0x0000,0x0400,0x0e00,
0x1b00,0x3180,0x3180,0x3180,0x3f80,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3000,0x3000,0x3000,0x3180,0x1f00,0x0c00,0x1800,0x0000,0x1b00,
0x0000,0x3180,0x3180,0x3180,0x3180,0x1f80,0x0000,0x0000,0x0600,0x0c00,0x0000,0x1f00,0x3180,0x3f80,0x3000,0x1f00,0x0000,0x0000,0x0e00,
0x1b00,0x0000,0x1f00,0x0180,0x1f80,0x3180,0x1f80,0x0000,0x0000,0x0000,0x1b00,0x0000,0x1f00,0x0180,0x1f80,0x3180,0x1f80,0x0000,0x0000,
0x0c00,0x0600,0x0000,0x1f00,0x0180,0x1f80,0x3180,0x1f80,0x0000,0x0000,0x0e00,0x1b00,0x0e00,0x1f00,0x0180,0x1f80,0x3180,0x1f80,0x0000,
0x0000,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3000,0x3180,0x1f00,0x0c00,0x1800,0x0e00,0x1b00,0x0000,0x1f00,0x3180,0x3f80,0x3000,0x1f00,
0x0000,0x0000,0x0000,0x1b00,0x0000,0x1f00,0x3180,0x3f80,0x3000,0x1f00,0x0000,0x0000,0x0c00,0x0600,0x0000,0x1f00,0x3180,0x3f80,0x3000,
0x1f00,0x0000,0x0000,0x0000,0x3600,0x0000,0x1c00,0x0c00,0x0c00,0x0c00,0x1e00,0x0000,0x0000,0x1c00,0x3600,0x0000,0x1c00,0x0c00,0x0c00,
0x0c00,0x1e00,0x0000,0x0000,0x1800,0x0c00,0x0000,0x1c00,0x0c00,0x0c00,0x0c00,0x1e00,0x0000,0x0000,0x0000,0x1b00,0x0000,0x1f00,0x3180,
0x3f80,0x3180,0x3180,0x0000,0x0000,0x0e00,0x1b00,0x0e00,0x1f00,0x3180,0x3f80,0x3180,0x3180,0x0000,0x0000,0x0600,0x0c00,0x0000,0x3f80,
0x3000,0x3f00,0x3000,0x3f80,0x0000,0x0000,0x0000,0x0000,0x0000,0x3b80,0x0ec0,0x3fc0,0x6e00,0x3b80,0x0000,0x0000,0x0000,0x1f80,0x3600,
0x6600,0x7f80,0x6600,0x6600,0x6780,0x0000,0x0000,0x0e00,0x1b00,0x0000,0x1f00,0x3180,0x3180,0x3180,0x1f00,0x0000,0x0000,0x0000,0x1b00,
0x0000,0x1f00,0x3180,0x3180,0x3180,0x1f00,0x0000,0x0000,0x0c00,0x0600,0x0000,0x1f00,0x3180,0x3180,0x3180,0x1f00,0x0000,0x0000,0x0e00,
0x1b00,0x0000,0x3180,0x3180,0x3180,0x3180,0x1f80,0x0000,0x0000,0x0c00,0x0600,0x0000,0x3180,0x3180,0x3180,0x3180,0x1f80,0x0000,0x0000,
0x0000,0x1b00,0x0000,0x3180,0x3180,0x3180,0x1f80,0x0180,0x1f00,0x0000,0x0000,0x1b00,0x0000,0x1f00,0x3180,0x3180,0x3180,0x1f00,0x0000,
0x0000,0x0000,0x1b00,0x0000,0x3180,0x3180,0x3180,0x3180,0x1f80,0x0000,0x0000,0x0000,0x0000,0x0400,0x1f00,0x3580,0x3400,0x3580,0x1f00,
0x0400,0x0000,0x0000,0x0f00,0x1980,0x1800,0x3e00,0x1800,0x1800,0x3000,0x3f80,0x0000,0x0000,0x6180,0x6180,0x3300,0x1e00,0x3f00,0x0c00,
0x3f00,0x0c00,0x0000,0x0000,0x7f00,0x6180,0x6d80,0x6d80,0x7f00,0x6c00,0x6c00,0x6700,0x0000,0x0000,0x0700,0x0c00,0x0c00,0x1e00,0x0c00,
0x0c00,0x0c00,0x3800,0x0000,0x0600,0x0c00,0x0000,0x1f00,0x0180,0x1f80,0x3180,0x1f80,0x0000,0x0000,0x0c00,0x1800,0x0000,0x1c00,0x0c00,
0x0c00,0x0c00,0x1e00,0x0000,0x0000,0x0600,0x0c00,0x0000,0x1f00,0x3180,0x3180,0x3180,0x1f00,0x0000,0x0000,0x0600,0x0c00,0x0000,0x3180,
0x3180,0x3180,0x3180,0x1f80,0x0000,0x0000,0x1d80,0x3700,0x0000,0x3f00,0x3180,0x3180,0x3180,0x3180,0x0000,0x0000,0x1d80,0x3700,0x0000,
0x3980,0x3d80,0x3780,0x3380,0x3180,0x0000,0x0000,0x0000,0x1e00,0x0300,0x1f00,0x3300,0x1f00,0x0000,0x0000,0x0000,0x0000,0x0000,0x1e00,
0x3300,0x3300,0x3300,0x1e00,0x0000,0x0000,0x0000,0x0000,0x0000,0x0c00,0x0000,0x0c00,0x1800,0x3000,0x3000,0x3300,0x1e00,0x0000,0x0000,
0x0000,0x0000,0x0000,0x3f80,0x3000,0x3000,0x3000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x3f80,0x0180,0x0180,0x0180,0x0000,0x0000,
0x0000,0x2080,0x2100,0x2200,0x2400,0x0b00,0x1180,0x2300,0x4380,0x0000,0x0000,0x2080,0x2100,0x2200,0x2400,0x0a80,0x1280,0x2380,0x4080,
0x0000,0x0000,0x0c00,0x0000,0x0c00,0x0c00,0x1e00,0x1e00,0x0c00,0x0000,0x0000,0x0000,0x0000,0x1980,0x3300,0x6600,0x3300,0x1980,0x0000,
0x0000,0x0000,0x0000,0x0000,0x6600,0x3300,0x1980,0x3300,0x6600,0x0000,0x0000,0x0000,0x2200,0x8880,0x2200,0x8880,0x2200,0x8880,0x2200,
0x8880,0x2200,0x8880,0x5540,0xaa80,0x5540,0xaa80,0x5540,0xaa80,0x5540,0xaa80,0x5540,0xaa80,0xbb80,0xeec0,0xbb80,0xeec0,0xbb80,0xeec0,
0xbb80,0xeec0,0xbb80,0xeec0,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0xfc00,
0xfc00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0xfc00,0xfc00,0x0c00,0x0c00,0xfc00,0xfc00,0x0c00,0x0c00,0x3300,0x3300,0x3300,0x3300,
0xf300,0xf300,0x3300,0x3300,0x3300,0x3300,0x0000,0x0000,0x0000,0x0000,0xff00,0xff00,0x3300,0x3300,0x3300,0x3300,0x0000,0x0000,0xfc00,
0xfc00,0x0c00,0x0c00,0xfc00,0xfc00,0x0c00,0x0c00,0x3300,0x3300,0xf300,0xf300,0x0300,0x0300,0xf300,0xf300,0x3300,0x3300,0x3300,0x3300,
0x3300,0x3300,0x3300,0x3300,0x3300,0x3300,0x3300,0x3300,0x0000,0x0000,0xff00,0xff00,0x0300,0x0300,0xf300,0xf300,0x3300,0x3300,0x3300,
0x3300,0xf300,0xf300,0x0300,0x0300,0xff00,0xff00,0x0000,0x0000,0x3300,0x3300,0x3300,0x3300,0xff00,0xff00,0x0000,0x0000,0x0000,0x0000,
0x1800,0x1800,0xf800,0xf800,0x1800,0x1800,0xf800,0xf800,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0xfc00,0xfc00,0x0c00,0x0c00,0x0c00,
0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0fc0,0x0fc0,0x0000,0x0000,0x0000,0x0000,0x0c00,0x0c00,0x0c00,0x0c00,0xffc0,0xffc0,0x0000,0x0000,
0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0xffc0,0xffc0,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0fc0,0x0fc0,0x0c00,
0x0c00,0x0c00,0x0c00,0x0000,0x0000,0x0000,0x0000,0xffc0,0xffc0,0x0000,0x0000,0x0000,0x0000,0x0c00,0x0c00,0x0c00,0x0c00,0xffc0,0xffc0,
0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0fc0,0x0fc0,0x0c00,0x0c00,0x0fc0,0x0fc0,0x0c00,0x0c00,0x3300,0x3300,0x3300,0x3300,0x33c0,
0x33c0,0x3300,0x3300,0x3300,0x3300,0x3300,0x3300,0x33c0,0x33c0,0x3000,0x3000,0x3fc0,0x3fc0,0x0000,0x0000,0x0000,0x0000,0x3fc0,0x3fc0,
0x3000,0x3000,0x33c0,0x33c0,0x3300,0x3300,0x3300,0x3300,0xf3c0,0xf3c0,0x0000,0x0000,0xffc0,0xffc0,0x0000,0x0000,0x0000,0x0000,0xffc0,
0xffc0,0x0000,0x0000,0xf3c0,0xf3c0,0x3300,0x3300,0x3300,0x3300,0x33c0,0x33c0,0x3000,0x3000,0x33c0,0x33c0,0x3300,0x3300,0x0000,0x0000,
0xffc0,0xffc0,0x0000,0x0000,0xffc0,0xffc0,0x0000,0x0000,0x3300,0x3300,0xf3c0,0xf3c0,0x0000,0x0000,0xf3c0,0xf3c0,0x3300,0x3300,0x0c00,
0x0c00,0xffc0,0xffc0,0x0000,0x0000,0xffc0,0xffc0,0x0000,0x0000,0x3300,0x3300,0x3300,0x3300,0xffc0,0xffc0,0x0000,0x0000,0x0000,0x0000,
0x0000,0x0000,0xffc0,0xffc0,0x0000,0x0000,0xffc0,0xffc0,0x0c00,0x0c00,0x0000,0x0000,0x0000,0x0000,0xffc0,0xffc0,0x3300,0x3300,0x3300,
0x3300,0x3300,0x3300,0x3300,0x3300,0x3fc0,0x3fc0,0x0000,0x0000,0x0000,0x0000,0x0c00,0x0c00,0x0fc0,0x0fc0,0x0c00,0x0c00,0x0fc0,0x0fc0,
0x0000,0x0000,0x0000,0x0000,0x0fc0,0x0fc0,0x0c00,0x0c00,0x0fc0,0x0fc0,0x0c00,0x0c00,0x0000,0x0000,0x0000,0x0000,0x3fc0,0x3fc0,0x3300,
0x3300,0x3300,0x3300,0x3300,0x3300,0x3300,0x3300,0xf3c0,0xf3c0,0x3300,0x3300,0x3300,0x3300,0x0c00,0x0c00,0xffc0,0xffc0,0x0000,0x0000,
0xffc0,0xffc0,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0xfc00,0xfc00,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0fc0,
0x0fc0,0x0c00,0x0c00,0x0c00,0x0c00,0xffc0,0xffc0,0xffc0,0xffc0,0xffc0,0xffc0,0xffc0,0xffc0,0xffc0,0xffc0,0x0000,0x0000,0x0000,0x0000,
0x0000,0xffc0,0xffc0,0xffc0,0xffc0,0xffc0,0xf800,0xf800,0xf800,0xf800,0xf800,0xf800,0xf800,0xf800,0xf800,0xf800,0x07c0,0x07c0,0x07c0,
0x07c0,0x07c0,0x07c0,0x07c0,0x07c0,0x07c0,0x07c0,0xffc0,0xffc0,0xffc0,0xffc0,0xffc0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
0x0000,0x1d80,0x3700,0x3200,0x3700,0x1d80,0x0000,0x0000,0x0000,0x1e00,0x3300,0x3300,0x3600,0x3300,0x3180,0x3700,0x3000,0x0000,0x0000,
0x3f80,0x3180,0x3000,0x3000,0x3000,0x3000,0x3000,0x0000,0x0000,0x0000,0x0000,0x7f80,0x3300,0x3300,0x3300,0x3300,0x3300,0x0000,0x0000,
0x0000,0x3f80,0x1800,0x0c00,0x0600,0x0c00,0x1800,0x3f80,0x0000,0x0000,0x0000,0x0000,0x0000,0x1f80,0x3600,0x3300,0x3300,0x1e00,0x0000,
0x0000,0x0000,0x0000,0x0000,0x6300,0x6300,0x6700,0x7d80,0x6000,0x6000,0x0000,0x0000,0x0000,0x0000,0x3f00,0x0c00,0x0c00,0x0c00,0x0600,
0x0000,0x0000,0x0000,0x1e00,0x0c00,0x3f00,0x6d80,0x6d80,0x3f00,0x0c00,0x1e00,0x0000,0x0000,0x1e00,0x3300,0x3300,0x3f00,0x3300,0x3300,
0x1e00,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3180,0x3180,0x3180,0x1b00,0x3b80,0x0000,0x0000,0x0000,0x1f00,0x0c00,0x0600,0x1f00,0x3180,
0x3180,0x1f00,0x0000,0x0000,0x0000,0x0000,0x0000,0x3b80,0x66c0,0x64c0,0x6cc0,0x3b80,0x0000,0x0000,0x0000,0x0000,0x0180,0x3f00,0x6780,
0x6d80,0x7980,0x3f00,0x6000,0x0000,0x0000,0x0000,0x0000,0x1f00,0x3000,0x1e00,0x3000,0x1f00,0x0000,0x0000,0x0000,0x1f00,0x3180,0x3180,
0x3180,0x3180,0x3180,0x3180,0x0000,0x0000,0x0000,0x0000,0x3f00,0x0000,0x3f00,0x0000,0x3f00,0x0000,0x0000,0x0000,0x0000,0x0c00,0x0c00,
0x3f00,0x0c00,0x0c00,0x0000,0x3f00,0x0000,0x0000,0x0000,0x0600,0x0c00,0x1800,0x0c00,0x0600,0x0000,0x3f00,0x0000,0x0000,0x0000,0x1800,
0x0c00,0x0600,0x0c00,0x1800,0x0000,0x3f00,0x0000,0x0000,0x0000,0x0700,0x0d80,0x0d80,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,
0x0c00,0x0c00,0x0c00,0x0c00,0x0c00,0x6c00,0x6c00,0x3800,0x0000,0x0000,0x0000,0x0c00,0x0000,0x3f00,0x0000,0x0c00,0x0000,0x0000,0x0000,
0x0000,0x3800,0x6d80,0x0700,0x0000,0x3800,0x6d80,0x0700,0x0000,0x0000,0x0000,0x0e00,0x1b00,0x1b00,0x0e00,0x0000,0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,0x0000,0x0c00,0x0c00,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0c00,0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,0x07c0,0x0600,0x0600,0x6600,0x3600,0x1e00,0x0e00,0x0600,0x0200,0x0000,0x3e00,0x3300,0x3300,0x3300,0x3300,0x0000,
0x0000,0x0000,0x0000,0x0000,0x1e00,0x0300,0x0e00,0x1800,0x1f00,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x1e00,0x1e00,0x1e00,
0x1e00,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
];

// 512x512: [0..511]
static immutable ubyte[7641] baphometPath = [
  0x01,0x04,0x06,0x30,0x89,0x7f,0x43,0x00,0x80,0xff,0x43,0x08,0xa0,0x1d,0xc6,0x43,0x00,0x80,0xff,0x43,
  0x00,0x80,0xff,0x43,0xa2,0x1d,0xc6,0x43,0x00,0x80,0xff,0x43,0x30,0x89,0x7f,0x43,0x08,0x00,0x80,0xff,
  0x43,0x7a,0x89,0xe5,0x42,0xa0,0x1d,0xc6,0x43,0x00,0x00,0x00,0x00,0x30,0x89,0x7f,0x43,0x00,0x00,0x00,
  0x00,0x08,0x7a,0x89,0xe5,0x42,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7a,0x89,0xe5,0x42,0x00,0x00,
  0x00,0x00,0x30,0x89,0x7f,0x43,0x08,0x00,0x00,0x00,0x00,0xa2,0x1d,0xc6,0x43,0x7a,0x89,0xe5,0x42,0x00,
  0x80,0xff,0x43,0x30,0x89,0x7f,0x43,0x00,0x80,0xff,0x43,0x09,0x06,0x30,0x89,0x7f,0x43,0x72,0x87,0xdd,
  0x43,0x08,0x16,0x68,0xb3,0x43,0x72,0x87,0xdd,0x43,0x71,0x87,0xdd,0x43,0x17,0x68,0xb3,0x43,0x71,0x87,
  0xdd,0x43,0x30,0x89,0x7f,0x43,0x08,0x71,0x87,0xdd,0x43,0xd2,0x2f,0x18,0x43,0x16,0x68,0xb3,0x43,0x35,
  0xe2,0x87,0x42,0x30,0x89,0x7f,0x43,0x35,0xe2,0x87,0x42,0x08,0xd1,0x2f,0x18,0x43,0x35,0xe2,0x87,0x42,
  0x35,0xe2,0x87,0x42,0xd2,0x2f,0x18,0x43,0x35,0xe2,0x87,0x42,0x30,0x89,0x7f,0x43,0x08,0x35,0xe2,0x87,
  0x42,0x17,0x68,0xb3,0x43,0xd1,0x2f,0x18,0x43,0x72,0x87,0xdd,0x43,0x30,0x89,0x7f,0x43,0x72,0x87,0xdd,
  0x43,0x09,0x06,0x79,0xcb,0x11,0x43,0x62,0xbf,0xd7,0x42,0x07,0xa4,0x3f,0x7f,0x43,0x0b,0x86,0xdc,0x43,
  0x07,0x6c,0xb9,0xb2,0x43,0xe8,0xd1,0xca,0x42,0x07,0x6e,0x4d,0xa0,0x42,0xa9,0x10,0x9c,0x43,0x07,0xb7,
  0x40,0xd7,0x43,0xa9,0x10,0x9c,0x43,0x07,0x79,0xcb,0x11,0x43,0x62,0xbf,0xd7,0x42,0x09,0x06,0x98,0x42,
  0x74,0x43,0xb1,0x8d,0x68,0x43,0x08,0xd7,0x24,0x79,0x43,0xba,0x83,0x6e,0x43,0xa9,0x16,0x7c,0x43,0x56,
  0xa1,0x76,0x43,0x74,0x2a,0x7d,0x43,0x44,0x73,0x80,0x43,0x08,0x55,0xd1,0x7e,0x43,0xe3,0xea,0x76,0x43,
  0xbc,0x18,0x81,0x43,0x7f,0xa8,0x6e,0x43,0x8f,0x0a,0x84,0x43,0x02,0xfc,0x68,0x43,0x09,0x06,0x92,0x29,
  0x8d,0x43,0x73,0xc3,0x67,0x43,0x08,0xa4,0xd9,0x8e,0x43,0xf2,0xa6,0x7a,0x43,0x8f,0x22,0x88,0x43,0x75,
  0x2a,0x7d,0x43,0x42,0x7f,0x82,0x43,0x08,0xc8,0x88,0x43,0x09,0x06,0xc1,0x79,0x74,0x43,0x50,0x64,0x89,
  0x43,0x08,0x68,0x2d,0x72,0x43,0xee,0x21,0x81,0x43,0xcd,0x97,0x55,0x43,0xe6,0xf1,0x7b,0x43,0x91,0xec,
  0x5d,0x43,0xa8,0xc7,0x6a,0x43,0x09,0x06,0xfa,0xa5,0x52,0x43,0x60,0x97,0x7c,0x43,0x08,0x19,0xff,0x50,
  0x43,0xe9,0x6e,0x8a,0x43,0xb0,0xbd,0x70,0x43,0x4c,0x51,0x82,0x43,0x04,0xeb,0x69,0x43,0x66,0x0f,0x8e,
  0x43,0x09,0x06,0x17,0xbf,0x71,0x43,0x2c,0x58,0x94,0x43,0x08,0x1c,0x96,0x6e,0x43,0x61,0x68,0x99,0x43,
  0x2d,0x3a,0x6e,0x43,0xc8,0x81,0x9e,0x43,0xb7,0x9b,0x72,0x43,0x61,0xa4,0xa3,0x43,0x09,0x06,0x30,0xdb,
  0x82,0x43,0xdb,0xe9,0x93,0x43,0x08,0x11,0x82,0x84,0x43,0x61,0x68,0x99,0x43,0xe8,0x4a,0x84,0x43,0x8e,
  0xa6,0x9e,0x43,0x42,0x7f,0x82,0x43,0x61,0xa4,0xa3,0x43,0x09,0x06,0xc4,0x02,0x85,0x43,0xd1,0x0b,0x92,
  0x43,0x08,0xd6,0xb2,0x86,0x43,0x34,0x1e,0x92,0x43,0x4f,0x58,0x87,0x43,0xa4,0xf1,0x92,0x43,0x03,0xd9,
  0x87,0x43,0x7b,0xc6,0x94,0x43,0x09,0x06,0x87,0x3e,0x64,0x43,0x31,0x3b,0x93,0x43,0x08,0x3b,0xbf,0x64,
  0x43,0x6f,0xf9,0x91,0x43,0x96,0x0b,0x67,0x43,0xc5,0x4a,0x91,0x43,0xcf,0xfe,0x6a,0x43,0x31,0x2f,0x91,
  0x43,0x09,0x06,0x16,0x74,0xb5,0x43,0x08,0xec,0x8e,0x43,0x08,0x1b,0x4b,0xb2,0x43,0xee,0x5d,0x8b,0x43,
  0x48,0x4d,0xad,0x43,0x12,0xa6,0x8a,0x43,0xf3,0xd7,0xa7,0x43,0x74,0xb8,0x8a,0x43,0x08,0x8c,0xb2,0xa0,
  0x43,0xcd,0xf8,0x8a,0x43,0x68,0x46,0x9b,0x43,0x79,0x8f,0x87,0x43,0x49,0xc9,0x96,0x43,0xe9,0x3e,0x82,
  0x43,0x08,0x60,0x5c,0x97,0x43,0xa1,0xde,0x8b,0x43,0x4e,0xa0,0x93,0x43,0x31,0x3b,0x93,0x43,0x9f,0xea,
  0x8d,0x43,0x27,0x8d,0x99,0x43,0x08,0x07,0xe0,0x8c,0x43,0x06,0x34,0x9b,0x43,0x38,0xe9,0x8c,0x43,0x46,
  0x0a,0x9e,0x43,0x3d,0xcc,0x8b,0x43,0xb2,0x06,0xa2,0x43,0x08,0xf1,0x40,0x8a,0x43,0xb0,0x12,0xa4,0x43,
  0x39,0xd1,0x88,0x43,0x76,0x43,0xa6,0x43,0xfa,0x06,0x88,0x43,0xa4,0x75,0xa9,0x43,0x08,0x19,0x6c,0x88,
  0x43,0x9f,0x9e,0xac,0x43,0x66,0xeb,0x87,0x43,0x44,0x76,0xb0,0x43,0x6b,0xce,0x86,0x43,0x3b,0xbc,0xb4,
  0x43,0x08,0xa9,0x8c,0x85,0x43,0x06,0xd0,0xb5,0x43,0xfa,0xee,0x83,0x43,0x74,0xa3,0xb6,0x43,0x3d,0x90,
  0x81,0x43,0x31,0xf6,0xb6,0x43,0x08,0x9d,0x61,0x7d,0x43,0xee,0x48,0xb7,0x43,0x3b,0x1f,0x75,0x43,0xcf,
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public enum ConBaphometDims = 512; /// it is square

public void conBaphometRender (scope void delegate (int x, int y) nothrow @trusted @nogc drawPixel, float ofsx=0, float ofsy=0, float scale=1) nothrow @trusted @nogc {
  import std.math : floor;

  void drawLine (int x0, int y0, int x1, int y1) {
    import std.math : abs;
    int dx = abs(x1-x0), sx = (x0 < x1 ? 1 : -1);
    int dy = -abs(y1-y0), sy = (y0 < y1 ? 1 : -1);
    int err = dx+dy; // error value e_xy
    for (;;) {
      drawPixel(x0, y0);
      int e2 = 2*err;
      // e_xy+e_x > 0
      if (e2 >= dy) {
        if (x0 == x1) break;
        err += dy; x0 += sx;
      }
      // e_xy+e_y < 0
      if (e2 <= dx) {
        if (y0 == y1) break;
        err += dx; y0 += sy;
      }
    }
  }

  // plot a limited quadratic Bezier segment
  void drawQuadBezierSeg (int x0, int y0, int x1, int y1, int x2, int y2) {
    int sx = x2-x1, sy = y2-y1;
    long xx = x0-x1, yy = y0-y1, xy; // relative values for checks
    double cur = xx*sy-yy*sx; // curvature
    assert(xx*sx <= 0 && yy*sy <= 0); // sign of gradient must not change
    // begin with longer part
    if (sx*cast(long)sx+sy*cast(long)sy > xx*xx+yy*yy) { x2 = x0; x0 = sx+x1; y2 = y0; y0 = sy+y1; cur = -cur; } // swap P0 P2
    // no straight line
    if (cur != 0) {
      xx += sx; xx *= (sx = x0 < x2 ? 1 : -1); // x step direction
      yy += sy; yy *= (sy = y0 < y2 ? 1 : -1); // y step direction
      xy = 2*xx*yy; xx *= xx; yy *= yy; // differences 2nd degree
      // negated curvature?
      if (cur*sx*sy < 0) { xx = -xx; yy = -yy; xy = -xy; cur = -cur; }
      double dx = 4.0*sy*cur*(x1-x0)+xx-xy; // differences 1st degree
      double dy = 4.0*sx*cur*(y0-y1)+yy-xy;
      xx += xx;
      yy += yy;
      double err = dx+dy+xy; // error 1st step
      do {
        drawPixel(x0, y0); // plot curve
        if (x0 == x2 && y0 == y2) return; // last pixel -> curve finished
        y1 = 2*err < dx; // save value for test of y step
        if (2*err > dy) { x0 += sx; dx -= xy; err += dy += yy; } // x step
        if (    y1    ) { y0 += sy; dy -= xy; err += dx += xx; } // y step
      } while (dy < 0 && dx > 0); // gradient negates -> algorithm fails
    }
    drawLine(x0, y0, x2, y2); // plot remaining part to end
  }

  // plot any quadratic Bezier curve
  void drawQuadBezier (int x0, int y0, int x1, int y1, int x2, int y2) {
    import std.math : abs, floor;
    int x = x0-x1, y = y0-y1;
    double t = x0-2*x1+x2;
    // horizontal cut at P4?
    if (cast(long)x*(x2-x1) > 0) {
      // vertical cut at P6 too?
      if (cast(long)y*(y2-y1) > 0) {
        // which first?
        if (abs((y0-2*y1+y2)/t*x) > abs(y)) { x0 = x2; x2 = x+x1; y0 = y2; y2 = y+y1; } // swap points
        // now horizontal cut at P4 comes first
      }
      t = (x0-x1)/t;
      double r = (1-t)*((1-t)*y0+2.0*t*y1)+t*t*y2; // By(t=P4)
      t = (x0*x2-x1*x1)*t/(x0-x1); // gradient dP4/dx=0
      x = cast(int)floor(t+0.5); y = cast(int)floor(r+0.5);
      r = (y1-y0)*(t-x0)/(x1-x0)+y0; // intersect P3 | P0 P1
      drawQuadBezierSeg(x0, y0, x, cast(int)floor(r+0.5), x, y);
      r = (y1-y2)*(t-x2)/(x1-x2)+y2; // intersect P4 | P1 P2
      x0 = x1 = x; y0 = y; y1 = cast(int)floor(r+0.5); // P0 = P4, P1 = P8
    }
    // vertical cut at P6?
    if (cast(long)(y0-y1)*(y2-y1) > 0) {
      t = y0-2*y1+y2; t = (y0-y1)/t;
      double r = (1-t)*((1-t)*x0+2.0*t*x1)+t*t*x2; // Bx(t=P6)
      t = (y0*y2-y1*y1)*t/(y0-y1); // gradient dP6/dy=0
      x = cast(int)floor(r+0.5); y = cast(int)floor(t+0.5);
      r = (x1-x0)*(t-y0)/(y1-y0)+x0; // intersect P6 | P0 P1
      drawQuadBezierSeg(x0, y0, cast(int)floor(r+0.5), y, x, y);
      r = (x1-x2)*(t-y2)/(y1-y2)+x2; // intersect P7 | P1 P2
      x0 = x; x1 = cast(int)floor(r+0.5); y0 = y1 = y; // P0 = P6, P1 = P7
    }
    drawQuadBezierSeg(x0, y0, x1, y1, x2, y2); // remaining part
  }

  // plot limited cubic Bezier segment
  void drawCubicBezierSeg (int x0, int y0, float x1, float y1, float x2, float y2, int x3, int y3) {
    import std.math : abs, floor, sqrt;
    immutable double EP = 0.01;
    int leg = 1;
    int sx = (x0 < x3 ? 1 : -1), sy = (y0 < y3 ? 1 : -1); // step direction
    float xc = -abs(x0+x1-x2-x3), xa = xc-4*sx*(x1-x2), xb = sx*(x0-x1-x2+x3);
    float yc = -abs(y0+y1-y2-y3), ya = yc-4*sy*(y1-y2), yb = sy*(y0-y1-y2+y3);
    // check for curve restrains
    // slope P0-P1 == P2-P3   and  (P0-P3 == P1-P2      or  no slope change)
    //!assert((x1-x0)*(x2-x3) < EP && ((x3-x0)*(x1-x2) < EP || xb*xb < xa*xc+EP));
    //!assert((y1-y0)*(y2-y3) < EP && ((y3-y0)*(y1-y2) < EP || yb*yb < ya*yc+EP));
    // quadratic Bezier
    if (xa == 0 && ya == 0) {
      // new midpoint
      sx = cast(int)floor((3*x1-x0+1)/2);
      sy = cast(int)floor((3*y1-y0+1)/2);
      return drawQuadBezierSeg(x0, y0, sx, sy, x3, y3);
    }
    x1 = (x1-x0)*(x1-x0)+(y1-y0)*(y1-y0)+1; // line lengths
    x2 = (x2-x3)*(x2-x3)+(y2-y3)*(y2-y3)+1;
    do { // loop over both ends
      double ab = xa*yb-xb*ya;
      double ac = xa*yc-xc*ya;
      double bc = xb*yc-xc*yb;
      double ex = ab*(ab+ac-3*bc)+ac*ac; // P0 part of self-intersection loop?
      immutable int f = cast(int)(ex > 0 ? 1 : sqrt(1+1024/x1)); // calculate resolution
      // increase resolution
      ab *= f;
      ac *= f;
      bc *= f;
      ex *= f*f;
      // init differences of 1st degree
      double xy = 9*(ab+ac+bc)/8;
      double cb = 8*(xa-ya);
      double dx = 27*(8*ab*(yb*yb-ya*yc)+ex*(ya+2*yb+yc))/64-ya*ya*(xy-ya);
      double dy = 27*(8*ab*(xb*xb-xa*xc)-ex*(xa+2*xb+xc))/64-xa*xa*(xy+xa);
      // init differences of 2nd degree
      double xx = 3*(3*ab*(3*yb*yb-ya*ya-2*ya*yc)-ya*(3*ac*(ya+yb)+ya*cb))/4;
      double yy = 3*(3*ab*(3*xb*xb-xa*xa-2*xa*xc)-xa*(3*ac*(xa+xb)+xa*cb))/4;
      xy = xa*ya*(6*ab+6*ac-3*bc+cb);
      ac = ya*ya;
      cb = xa*xa;
      xy = 3*(xy+9*f*(cb*yb*yc-xb*xc*ac)-18*xb*yb*ab)/8;
      // negate values if inside self-intersection loop
      if (ex < 0) { dx = -dx; dy = -dy; xx = -xx; yy = -yy; xy = -xy; ac = -ac; cb = -cb; }
      // init differences of 3rd degree
      ab = 6*ya*ac;
      ac = -6*xa*ac;
      bc = 6*ya*cb;
      cb = -6*xa*cb;
      // error of 1st step
      dx += xy;
      ex = dx+dy;
      dy += xy;
      const(double)* pxy = &xy;
      zzloop: for (int fx = f, fy = f; x0 != x3 && y0 != y3; ) {
        drawPixel(x0, y0); // plot curve
        // move sub-steps of one pixel
        do {
          if (dx > *pxy || dy < *pxy) break zzloop; // confusing values
          y1 = 2*ex-dy; // save value for test of y step
          if (2*ex >= dx) { fx--; ex += dx += xx; dy += xy += ac; yy += bc; xx += ab; } // x sub-step
          if (y1 <= 0) { fy--; ex += dy += yy; dx += xy += bc; xx += ac; yy += cb; } // y sub-step
        } while (fx > 0 && fy > 0); // pixel complete?
        if (2*fx <= f) { x0 += sx; fx += f; } // x step
        if (2*fy <= f) { y0 += sy; fy += f; } // y step
        if (pxy == &xy && dx < 0 && dy > 0) pxy = &EP; // pixel ahead valid
      }
      xx = x0; x0 = x3; x3 = cast(int)xx; sx = -sx; xb = -xb; // swap legs
      yy = y0; y0 = y3; y3 = cast(int)yy; sy = -sy; yb = -yb; x1 = x2;
    } while (leg--); // try other end
    drawLine(x0, y0, x3, y3); // remaining part in case of cusp or crunode
  }

  // plot any cubic Bezier curve
  void drawCubicBezier (int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3) {
    import std.math : abs, floor, sqrt;
    int n = 0, i = 0;
    long xc = x0+x1-x2-x3, xa = xc-4*(x1-x2);
    long xb = x0-x1-x2+x3, xd = xb+4*(x1+x2);
    long yc = y0+y1-y2-y3, ya = yc-4*(y1-y2);
    long yb = y0-y1-y2+y3, yd = yb+4*(y1+y2);
    float fx0 = x0, fy0 = y0;
    double t1 = xb*xb-xa*xc;
    double[5] t;
    // sub-divide curve at gradient sign changes
    if (xa == 0) { // horizontal
      if (abs(xc) < 2*abs(xb)) t.ptr[n++] = xc/(2.0*xb); // one change
    } else if (t1 > 0.0) { // two changes
      immutable double t2 = sqrt(t1);
      t1 = (xb-t2)/xa; if (abs(t1) < 1.0) t.ptr[n++] = t1;
      t1 = (xb+t2)/xa; if (abs(t1) < 1.0) t.ptr[n++] = t1;
    }
    t1 = yb*yb-ya*yc;
    if (ya == 0) { // vertical
      if (abs(yc) < 2*abs(yb)) t.ptr[n++] = yc/(2.0*yb); // one change
    } else if (t1 > 0.0) { // two changes
      immutable double t2 = sqrt(t1);
      t1 = (yb-t2)/ya; if (abs(t1) < 1.0) t.ptr[n++] = t1;
      t1 = (yb+t2)/ya; if (abs(t1) < 1.0) t.ptr[n++] = t1;
    }
    // bubble sort of 4 points
    for (i = 1; i < n; i++) if ((t1 = t.ptr[i-1]) > t.ptr[i]) { t.ptr[i-1] = t.ptr[i]; t.ptr[i] = t1; i = 0; }
    t1 = -1.0; t.ptr[n] = 1.0; // begin / end point
    for (i = 0; i <= n; i++) { // plot each segment separately
      immutable double t2 = t.ptr[i]; // sub-divide at t[i-1], t[i]
      float fx1 = (t1*(t1*xb-2*xc)-t2*(t1*(t1*xa-2*xb)+xc)+xd)/8-fx0;
      float fy1 = (t1*(t1*yb-2*yc)-t2*(t1*(t1*ya-2*yb)+yc)+yd)/8-fy0;
      float fx2 = (t2*(t2*xb-2*xc)-t1*(t2*(t2*xa-2*xb)+xc)+xd)/8-fx0;
      float fy2 = (t2*(t2*yb-2*yc)-t1*(t2*(t2*ya-2*yb)+yc)+yd)/8-fy0;
      immutable float fx3 = (t2*(t2*(3*xb-t2*xa)-3*xc)+xd)/8;
      immutable float fy3 = (t2*(t2*(3*yb-t2*ya)-3*yc)+yd)/8;
      fx0 -= fx3;
      fy0 -= fy3;
      // scale bounds to int
      x3 = cast(int)floor(fx3+0.5);
      y3 = cast(int)floor(fy3+0.5);
      if (fx0 != 0.0) { fx1 *= fx0 = (x0-x3)/fx0; fx2 *= fx0; }
      if (fy0 != 0.0) { fy1 *= fy0 = (y0-y3)/fy0; fy2 *= fy0; }
      if (x0 != x3 || y0 != y3) drawCubicBezierSeg(x0, y0, x0+fx1, y0+fy1, x0+fx2, y0+fy2, x3, y3); // segment t1 - t2
      x0 = x3; y0 = y3; fx0 = fx3; fy0 = fy3; t1 = t2;
    }
  }

  auto path = cast(const(ubyte)[])baphometPath;
  immutable plen = path.length;
  uint ppos = 0;

  enum Command {
    Bounds, // always first, has 4 args (x0, y0, x1, y1)
    StrokeMode,
    FillMode,
    StrokeFillMode,
    NormalStroke,
    ThinStroke,
    MoveTo,
    LineTo,
    CubicTo, // cubic bezier
    EndPath,
  }

  Command getCommand () nothrow @trusted @nogc {
    if (ppos >= plen) assert(0, "invalid path");
    return cast(Command)(path.ptr[ppos++]);
  }

  float getFloat () nothrow @trusted @nogc {
    if (ppos >= plen || plen-ppos < float.sizeof) assert(0, "invalid path");
    version(LittleEndian) {
      float res = *cast(const(float)*)(&path.ptr[ppos]);
      ppos += cast(uint)float.sizeof;
      return res;
    } else {
      static assert(float.sizeof == 4);
      uint xp = path.ptr[ppos]|(path.ptr[ppos+1]<<8)|(path.ptr[ppos+2]<<16)|(path.ptr[ppos+3]<<24);
      ppos += cast(uint)float.sizeof;
      return *cast(const(float)*)(&xp);
    }
  }

  int scaleX (float v) nothrow @trusted @nogc { pragma(inline, true); return cast(int)floor(ofsx+v*scale); }
  int scaleY (float v) nothrow @trusted @nogc { pragma(inline, true); return cast(int)floor(ofsy+v*scale); }

  if (path.length == 0) return;
  int cx = 0, cy = 0;
  while (ppos < plen) {
    switch (getCommand()) {
      case Command.Bounds: ppos += 4*cast(uint)float.sizeof; break;
      case Command.StrokeMode: case Command.FillMode: case Command.StrokeFillMode: break;
      case Command.NormalStroke: case Command.ThinStroke: break;
      case Command.MoveTo:
        cx = scaleX(getFloat());
        cy = scaleY(getFloat());
        break;
      case Command.LineTo:
        immutable int ex = scaleX(getFloat());
        immutable int ey = scaleY(getFloat());
        drawLine(cx, cy, ex, ey);
        cx = ex;
        cy = ey;
        break;
      case Command.CubicTo: // cubic bezier
        immutable int x1 = scaleX(getFloat());
        immutable int y1 = scaleY(getFloat());
        immutable int x2 = scaleX(getFloat());
        immutable int y2 = scaleY(getFloat());
        immutable int ex = scaleX(getFloat());
        immutable int ey = scaleY(getFloat());
        drawCubicBezier(cx, cy, x1, y1, x2, y2, ex, ey);
        cx = ex;
        cy = ey;
        break;
      case Command.EndPath: // don't close this path
        break;
      default: assert(0, "invalid path command");
    }
  }
}


// ////////////////////////////////////////////////////////////////////////// //
version(glbinds_mixin) import iv.glbinds.binds_full_mixin; else import iv.glbinds;