X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fflexui%2Ffui_gfx_gl.pas;h=e543fc0e7023a9700a08ddf705f83f439aa8958c;hb=d4c1e78fe6bfb7cbbff5ced6b94d6e630e06d6f2;hp=4a2e5bf1709df418a2060689d0b5449d83f81471;hpb=26290d9816334b8377531cf8b3e58643444f4d04;p=d2df-sdl.git

diff --git a/src/flexui/fui_gfx_gl.pas b/src/flexui/fui_gfx_gl.pas
index 4a2e5bf..e543fc0 100644
--- a/src/flexui/fui_gfx_gl.pas
+++ b/src/flexui/fui_gfx_gl.pas
@@ -3,8 +3,7 @@
  *
  * 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, either version 3 of the License, or
- * (at your option) any later version.
+ * 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
@@ -15,70 +14,144 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  *)
 {$INCLUDE ../shared/a_modes.inc}
+{$DEFINE FUI_TEXT_ICONS}
 unit fui_gfx_gl;
 
 interface
 
 uses
+  {$INCLUDE ../nogl/noGLuses.inc}
   SysUtils, Classes,
-  GL, GLExt, SDL2,
+  SDL2,
   sdlcarcass,
   fui_common, fui_events;
 
 
 // ////////////////////////////////////////////////////////////////////////// //
-// setup 2D OpenGL mode; will be called automatically in `glInit()`
-procedure oglSetup2D (winWidth, winHeight: Integer; upsideDown: Boolean=false);
-
-// the following calls MUST be paired AT ALL COSTS!
-procedure gxBeginUIDraw (scale: Single=1.0);
-procedure gxEndUIDraw ();
+type
+  TGxFont = class
+  protected
+    mName: AnsiString;
+    mHeight: Integer;
+    mBaseLine: Integer;
 
+  public
+    function charWidth (const ch: AnsiChar): Integer; virtual; abstract;
+    function textWidth (const s: AnsiString): Integer; virtual; abstract;
 
-type
-  TScissorSave = record
   public
-    wassc: Boolean;
-    scxywh: packed array[0..3] of GLint;
+    property name: AnsiString read mName;
+    property height: Integer read mHeight;
+    property baseLine: Integer read mBaseLine;
+  end;
 
+  TGxContext = class
   public
+    type
+      TMarkIcon = (
+        Checkbox,
+        Radiobox
+      );
+
+    type
+      TWinIcon = (
+        Close
+      );
+
+  protected
+    mActive: Boolean;
+    mColor: TGxRGBA;
+    mFont: TGxFont;
+    // for active contexts
+    mScaled: Boolean;
+    mScale: Single;
+    mClipRect: TGxRect;
+    mClipOfs: TGxOfs;
+
+  protected
+    function getFont (): AnsiString;
+    procedure setFont (const aname: AnsiString);
+
+    procedure onActivate ();
+    procedure onDeactivate ();
+
+    procedure setColor (const clr: TGxRGBA);
+
+    procedure realizeClip (); // setup scissoring
+
+    procedure setClipOfs (const aofs: TGxOfs);
+    procedure setClipRect (const aclip: TGxRect);
 
   public
-    procedure save (enableScissoring: Boolean);
-    procedure restore ();
+    constructor Create ();
+    destructor Destroy (); override;
 
-    // set new scissor rect, bounded by the saved scissor rect
-    procedure combineRect (x, y, w, h: Integer);
+    procedure line (x1, y1, x2, y2: Integer);
+    procedure hline (x, y, len: Integer);
+    procedure vline (x, y, len: Integer);
+    procedure rect (x, y, w, h: Integer);
+    procedure fillRect (x, y, w, h: Integer);
+    procedure darkenRect (x, y, w, h: Integer; a: Integer);
+
+    function charWidth (const ch: AnsiChar): Integer;
+    function charHeight (const ch: AnsiChar): Integer;
+    function textWidth (const s: AnsiString): Integer;
+    function textHeight (const s: AnsiString): Integer;
+    function drawChar (x, y: Integer; const ch: AnsiChar): Integer; // returns char width
+    function drawText (x, y: Integer; const s: AnsiString): Integer; // returns text width
+
+    function iconMarkWidth (ic: TMarkIcon): Integer;
+    function iconMarkHeight (ic: TMarkIcon): Integer;
+    procedure drawIconMark (ic: TMarkIcon; x, y: Integer; marked: Boolean);
+
+    function iconWinWidth (ic: TWinIcon): Integer;
+    function iconWinHeight (ic: TWinIcon): Integer;
+    procedure drawIconWin (ic: TWinIcon; x, y: Integer; pressed: Boolean);
+
+    procedure resetClip ();
+
+    function setOffset (constref aofs: TGxOfs): TGxOfs; // returns previous offset
+    function setClip (constref aclip: TGxRect): TGxRect; // returns previous clip
+
+    function combineClip (constref aclip: TGxRect): TGxRect; // returns previous clip
+
+    // vertical scrollbar
+    procedure drawVSBar (x, y, wdt, hgt: Integer; cur, min, max: Integer; constref clrfull, clrempty: TGxRGBA);
+    // horizontal scrollbar
+    procedure drawHSBar (x, y, wdt, hgt: Integer; cur, min, max: Integer; constref clrfull, clrempty: TGxRGBA);
+
+    class function sbarFilled (wh: Integer; cur, min, max: Integer): Integer;
+    class function sbarPos (cxy: Integer; xy, wh: Integer; min, max: Integer): Integer;
+
+  public //HACK!
+    procedure glSetScale (ascale: Single);
+    procedure glSetTrans (ax, ay: Single);
+    procedure glSetScaleTrans (ascale, ax, ay: Single);
+
+  public
+    property active: Boolean read mActive;
+    property color: TGxRGBA read mColor write setColor;
+    property font: AnsiString read getFont write setFont;
+    property offset: TGxOfs read mClipOfs write setClipOfs;
+    property clip: TGxRect read mClipRect write setClipRect; // clipping is unaffected by offset
   end;
 
 
+// set active context; `ctx` can be `nil`
+procedure gxSetContext (ctx: TGxContext; ascale: Single=1.0);
+procedure gxSetContextNoMatrix (ctx: TGxContext);
+
+
+// setup 2D OpenGL mode; will be called automatically in `glInit()`
+procedure oglSetup2D (winWidth, winHeight: Integer; upsideDown: Boolean=false);
+procedure oglSetup2DState (); // don't modify viewports and matrices
+
 procedure oglDrawCursor ();
 procedure oglDrawCursorAt (msX, msY: Integer);
 
-function setupGLColor (r, g, b, a: Integer): Boolean;
-function setupGLColor (constref clr: TGxRGBA): Boolean;
-function isScaled (): Boolean;
 
-function textWidth6 (const s: AnsiString): Integer;
-function textWidth8 (const s: AnsiString): Integer;
-// return width (including last empty pixel)
-function drawTextInternal (wdt, x, y: Integer; const s: AnsiString; constref clr: TGxRGBA; tid: GLuint; constref fontwdt: array of Byte; prop: Boolean): Integer;
-procedure drawLine (x1, y1, x2, y2: Integer; constref clr: TGxRGBA);
-procedure drawVLine (x, y, len: Integer; constref clr: TGxRGBA);
-procedure drawHLine (x, y, len: Integer; constref clr: TGxRGBA);
-procedure drawRect (x, y, w, h: Integer; constref clr: TGxRGBA);
-procedure drawRectUI (x, y, w, h: Integer; constref clr: TGxRGBA);
-procedure darkenRect (x, y, w, h: Integer; a: Integer);
-procedure fillRect (x, y, w, h: Integer; constref clr: TGxRGBA);
-function drawText6 (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
-function drawText8 (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
-function drawText6Prop (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
-function drawText8Prop (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
-// x-centered at `x`
-function drawText6XC (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
-function drawText8XC (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
-function drawText6PropXC (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
-function drawText8PropXC (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
+procedure fuiGfxLoadFont (const fontname: AnsiString; const fontFile: AnsiString; proportional: Boolean=false);
+procedure fuiGfxLoadFont (const fontname: AnsiString; st: TStream; proportional: Boolean=false);
 
 
 // ////////////////////////////////////////////////////////////////////////// //
@@ -88,433 +161,333 @@ var
 
 implementation
 
+uses
+  fui_wadread,
+  utils;
+
 
 // ////////////////////////////////////////////////////////////////////////// //
-procedure oglSetup2D (winWidth, winHeight: Integer; upsideDown: Boolean=false);
+// returns `false` if the color is transparent
+// returns `false` if the color is transparent
+function setupGLColor (constref clr: TGxRGBA): Boolean;
 begin
-  glViewport(0, 0, winWidth, winHeight);
-
-  glDisable(GL_BLEND);
-  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-  glDisable(GL_LINE_SMOOTH);
-  glDisable(GL_POINT_SMOOTH);
-  glDisable(GL_DEPTH_TEST);
-  glDisable(GL_TEXTURE_2D);
-  glDisable(GL_LIGHTING);
-  glDisable(GL_DITHER);
-  glDisable(GL_STENCIL_TEST);
-  glDisable(GL_SCISSOR_TEST);
-  glDisable(GL_CULL_FACE);
-
-  glMatrixMode(GL_PROJECTION);
-  glLoadIdentity();
-  if (upsideDown) then
+  if (clr.a < 255) then
   begin
-    glOrtho(0, winWidth, 0, winHeight, -1, 1); // set origin to bottom left
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
   end
   else
   begin
-    glOrtho(0, winWidth, winHeight, 0, -1, 1); // set origin to top left
+    glDisable(GL_BLEND);
   end;
+  glColor4ub(clr.r, clr.g, clr.b, clr.a);
+  result := (clr.a <> 0);
+end;
 
-  glMatrixMode(GL_MODELVIEW);
-  glLoadIdentity();
-
-  glClearColor(0, 0, 0, 0);
-  glColor4f(1, 1, 1, 1);
+function isScaled (): Boolean;
+var
+  mt: packed array [0..15] of GLfloat;
+begin
+  glGetFloatv(GL_MODELVIEW_MATRIX, @mt[0]);
+  result := (mt[0] <> 1.0) or (mt[1*4+1] <> 1.0);
 end;
 
 
-procedure gxBeginUIDraw (scale: Single=1.0);
+// ////////////////////////////////////////////////////////////////////////// //
+//TODO: OpenGL framebuffers and shaders state
+type
+  TSavedGLState = record
+  public
+    glmatmode: GLint;
+    gltextbinding: GLint;
+    //oldprg: GLint;
+    //oldfbr, oldfbw: GLint;
+    glvport: packed array [0..3] of GLint;
+    saved: Boolean;
+
+  public
+    constructor Create (dosave: Boolean);
+    procedure save ();
+    procedure restore ();
+  end;
+
+constructor TSavedGLState.Create (dosave: Boolean);
 begin
-  glMatrixMode(GL_MODELVIEW);
-  glPushMatrix();
-  glLoadIdentity();
-  glScalef(scale, scale, 1);
+  FillChar(self, sizeof(self), 0);
+  if (dosave) then save();
 end;
 
-procedure gxEndUIDraw ();
+procedure TSavedGLState.save ();
 begin
-  glMatrixMode(GL_MODELVIEW);
-  glPopMatrix();
+  if (saved) then raise Exception.Create('cannot save into already saved OpenGL state');
+  glGetIntegerv(GL_MATRIX_MODE, @glmatmode);
+  glGetIntegerv(GL_TEXTURE_BINDING_2D, @gltextbinding);
+  glGetIntegerv(GL_VIEWPORT, @glvport[0]);
+  //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
+  saved := true;
 end;
 
-
-// ////////////////////////////////////////////////////////////////////////// //
-// cursor (hi, Death Track!)
-const curTexWidth = 32;
-const curTexHeight = 32;
-const curWidth = 17;
-const curHeight = 23;
-
-const cursorImg: array[0..curWidth*curHeight-1] of Byte = (
-  2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  3,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  3,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  3,3,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  3,3,4,2,2,0,0,0,0,0,0,0,0,0,0,0,0,
-  3,3,4,4,2,2,0,0,0,0,0,0,0,0,0,0,0,
-  3,3,4,4,4,2,2,0,0,0,0,0,0,0,0,0,0,
-  3,3,4,4,4,4,2,2,0,0,0,0,0,0,0,0,0,
-  3,3,4,4,4,5,6,2,2,0,0,0,0,0,0,0,0,
-  3,3,4,4,5,6,7,5,2,2,0,0,0,0,0,0,0,
-  3,3,4,5,6,7,5,4,5,2,2,0,0,0,0,0,0,
-  3,3,5,6,7,5,4,5,6,7,2,2,0,0,0,0,0,
-  3,3,6,7,5,4,5,6,7,7,7,2,2,0,0,0,0,
-  3,3,7,5,4,5,6,7,7,7,7,7,2,2,0,0,0,
-  3,3,5,4,5,6,8,8,8,8,8,8,8,8,2,0,0,
-  3,3,4,5,6,3,8,8,8,8,8,8,8,8,8,0,0,
-  3,3,5,6,3,3,0,0,0,0,0,0,0,0,0,0,0,
-  3,3,6,3,3,0,0,0,0,0,0,0,0,0,0,0,0,
-  3,3,3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  3,3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-);
-const cursorPal: array[0..9*4-1] of Byte = (
-    0,  0,  0,  0,
-    0,  0,  0,163,
-   85,255,255,255,
-   85, 85,255,255,
-  255, 85, 85,255,
-  170,  0,170,255,
-   85, 85, 85,255,
-    0,  0,  0,255,
-    0,  0,170,255
-);
+procedure TSavedGLState.restore ();
+begin
+  if (not saved) then raise Exception.Create('cannot restore unsaved OpenGL state');
+  glPopAttrib({GL_ENABLE_BIT});
+  glMatrixMode(GL_PROJECTION); glPopMatrix();
+  glMatrixMode(GL_MODELVIEW); glPopMatrix();
+  glMatrixMode(GL_TEXTURE); glPopMatrix();
+  glMatrixMode(GL_COLOR); 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(glvport[0], glvport[1], glvport[2], glvport[3]);
+  saved := false;
+end;
 
 
 var
-  curtexid: GLuint = 0;
+  curCtx: TGxContext = nil;
+  savedGLState: TSavedGLState;
+
 
-procedure createCursorTexture ();
+// ////////////////////////////////////////////////////////////////////////// //
+// set active context; `ctx` can be `nil`
+procedure gxSetContextInternal (ctx: TGxContext; ascale: Single; domatrix: Boolean);
 var
-  tex, tpp: PByte;
-  c: Integer;
-  x, y: Integer;
+  mt: packed array [0..15] of GLfloat;
 begin
-  if (curtexid <> 0) then exit; //begin glDeleteTextures(1, @curtexid); curtexid := 0; end;
+  if (savedGLState.saved) then savedGLState.restore();
 
-  GetMem(tex, curTexWidth*curTexHeight*4);
-  try
-    FillChar(tex^, curTexWidth*curTexHeight*4, 0);
+  if (curCtx <> nil) then
+  begin
+    curCtx.onDeactivate();
+    curCtx.mActive := false;
+  end;
 
-    // draw shadow
-    for y := 0 to curHeight-1 do
+  curCtx := ctx;
+  if (ctx <> nil) then
+  begin
+    ctx.mActive := true;
+    savedGLState.save();
+    if (domatrix) then
     begin
-      for x := 0 to curWidth-1 do
-      begin
-        if (cursorImg[y*curWidth+x] <> 0) then
-        begin
-          c := 1*4;
-          tpp := tex+((y+1)*(curTexWidth*4)+(x+3)*4);
-          tpp^ := cursorPal[c+0]; Inc(tpp);
-          tpp^ := cursorPal[c+1]; Inc(tpp);
-          tpp^ := cursorPal[c+2]; Inc(tpp);
-          tpp^ := cursorPal[c+3]; Inc(tpp);
-          tpp^ := cursorPal[c+0]; Inc(tpp);
-          tpp^ := cursorPal[c+1]; Inc(tpp);
-          tpp^ := cursorPal[c+2]; Inc(tpp);
-          tpp^ := cursorPal[c+3]; Inc(tpp);
-        end;
-      end;
-    end;
-
-    // draw cursor
-    for y := 0 to curHeight-1 do
+      oglSetup2D(fuiScrWdt, fuiScrHgt);
+      glScalef(ascale, ascale, 1.0);
+      ctx.mScaled := (ascale <> 1.0);
+      ctx.mScale := ascale;
+    end
+    else
     begin
-      for x := 0 to curWidth-1 do
-      begin
-        c := cursorImg[y*curWidth+x]*4;
-        if (c <> 0) then
-        begin
-          tpp := tex+(y*(curTexWidth*4)+x*4);
-          tpp^ := cursorPal[c+0]; Inc(tpp);
-          tpp^ := cursorPal[c+1]; Inc(tpp);
-          tpp^ := cursorPal[c+2]; Inc(tpp);
-          tpp^ := cursorPal[c+3]; Inc(tpp);
-        end;
-      end;
+      // assume uniform scale
+      glGetFloatv(GL_MODELVIEW_MATRIX, @mt[0]);
+      ctx.mScaled := (mt[0] <> 1.0) or (mt[1*4+1] <> 1.0);
+      ctx.mScale := mt[0];
+      oglSetup2DState();
     end;
+    ctx.onActivate();
+  end;
+end;
+
+
+procedure gxSetContext (ctx: TGxContext; ascale: Single=1.0); begin gxSetContextInternal(ctx, ascale, true); end;
+procedure gxSetContextNoMatrix (ctx: TGxContext); begin gxSetContextInternal(ctx, 1, false); end;
 
-    glGenTextures(1, @curtexid);
-    if (curtexid = 0) then raise Exception.Create('can''t create cursor texture');
 
-    glBindTexture(GL_TEXTURE_2D, curtexid);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+// ////////////////////////////////////////////////////////////////////////// //
+type
+  TScissorSave = record
+  public
+    wassc: Boolean;
+    scxywh: packed array[0..3] of GLint;
+
+  public
 
-    //GLfloat[4] bclr = 0.0;
-    //glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, bclr.ptr);
+  public
+    procedure save (enableScissoring: Boolean);
+    procedure restore ();
 
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, curTexWidth, curTexHeight, 0, GL_RGBA{gltt}, GL_UNSIGNED_BYTE, tex);
-    glFlush();
-  finally
-    FreeMem(tex);
+    // set new scissor rect, bounded by the saved scissor rect
+    procedure combineRect (x, y, w, h: Integer);
   end;
+
+
+procedure TScissorSave.save (enableScissoring: Boolean);
+begin
+  wassc := (glIsEnabled(GL_SCISSOR_TEST) <> 0);
+  if wassc then glGetIntegerv(GL_SCISSOR_BOX, @scxywh[0]) else glGetIntegerv(GL_VIEWPORT, @scxywh[0]);
+  //conwritefln('(%d,%d)-(%d,%d)', [scxywh[0], scxywh[1], scxywh[2], scxywh[3]]);
+  if enableScissoring and (not wassc) then glEnable(GL_SCISSOR_TEST);
 end;
 
-procedure oglDrawCursorAt (msX, msY: Integer);
+procedure TScissorSave.restore ();
 begin
-  //if (curtexid = 0) then createCursorTexture() else glBindTexture(GL_TEXTURE_2D, curtexid);
-  glBindTexture(GL_TEXTURE_2D, curtexid);
-  // blend it
-  glEnable(GL_BLEND);
-  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-  glEnable(GL_TEXTURE_2D);
-  glDisable(GL_STENCIL_TEST);
-  glDisable(GL_SCISSOR_TEST);
-  glDisable(GL_LIGHTING);
-  glDisable(GL_DEPTH_TEST);
-  glDisable(GL_CULL_FACE);
-  // color and opacity
-  glColor4f(1, 1, 1, 0.9);
-  //Dec(msX, 2);
-  glBegin(GL_QUADS);
-    glTexCoord2f(0.0, 0.0); glVertex2i(msX, msY); // top-left
-    glTexCoord2f(1.0, 0.0); glVertex2i(msX+curTexWidth, msY); // top-right
-    glTexCoord2f(1.0, 1.0); glVertex2i(msX+curTexWidth, msY+curTexHeight); // bottom-right
-    glTexCoord2f(0.0, 1.0); glVertex2i(msX, msY+curTexHeight); // bottom-left
-  glEnd();
-  //Inc(msX, 2);
-  glDisable(GL_BLEND);
-  glDisable(GL_TEXTURE_2D);
-  glColor4f(1, 1, 1, 1);
-  glBindTexture(GL_TEXTURE_2D, 0);
+  glScissor(scxywh[0], scxywh[1], scxywh[2], scxywh[3]);
+  if wassc then glEnable(GL_SCISSOR_TEST) else glDisable(GL_SCISSOR_TEST);
 end;
 
-procedure oglDrawCursor (); begin oglDrawCursorAt(fuiMouseX, fuiMouseY); end;
+procedure TScissorSave.combineRect (x, y, w, h: Integer);
+//var ox, oy, ow, oh: Integer;
+begin
+  if (w < 1) or (h < 1) then begin glScissor(0, 0, 0, 0); exit; end;
+  y := fuiScrHgt-(y+h);
+  //ox := x; oy := y; ow := w; oh := h;
+  if not intersectRect(x, y, w, h, scxywh[0], scxywh[1], scxywh[2], scxywh[3]) then
+  begin
+    //writeln('oops: COMBINE: old=(', ox, ',', oy, ')-(', ox+ow-1, ',', oy+oh-1, '); sci: (', scxywh[0], ',', scxywh[1], ')-(', scxywh[0]+scxywh[2]-1, ',', scxywh[1]+scxywh[3]-1, ')');
+    //writeln('oops: COMBINE: oldx=<', ox, '-', ox+ow-1, '>; oldy=<', oy, ',', oy+oh-1, '> : scix=<', scxywh[0], '-', scxywh[0]+scxywh[2]-1, '>; sciy=<', scxywh[1], '-', scxywh[1]+scxywh[3]-1, '>');
+    glScissor(0, 0, 0, 0);
+  end
+  else
+  begin
+    glScissor(x, y, w, h);
+  end;
+end;
 
 
 // ////////////////////////////////////////////////////////////////////////// //
-// fonts
-const kgiFont6: array[0..256*8-1] of Byte  = (
-$00,$00,$00,$00,$00,$00,$00,$00,$3c,$42,$a5,$81,$a5,$99,$42,$3c,$3c,$7e,$db,$ff,$ff,$db,$66,$3c,$6c,$fe,
-$fe,$fe,$7c,$38,$10,$00,$10,$38,$7c,$fe,$7c,$38,$10,$00,$10,$38,$54,$fe,$54,$10,$38,$00,$10,$38,$7c,$fe,
-$fe,$10,$38,$00,$00,$00,$00,$30,$30,$00,$00,$00,$ff,$ff,$ff,$e7,$e7,$ff,$ff,$ff,$38,$44,$82,$82,$82,$44,
-$38,$00,$c7,$bb,$7d,$7d,$7d,$bb,$c7,$ff,$0f,$03,$05,$79,$88,$88,$88,$70,$38,$44,$44,$44,$38,$10,$7c,$10,
-$30,$28,$24,$24,$28,$20,$e0,$c0,$3c,$24,$3c,$24,$24,$e4,$dc,$18,$10,$54,$38,$ee,$38,$54,$10,$00,$10,$10,
-$10,$7c,$10,$10,$10,$10,$10,$10,$10,$ff,$00,$00,$00,$00,$00,$00,$00,$ff,$10,$10,$10,$10,$10,$10,$10,$f0,
-$10,$10,$10,$10,$10,$10,$10,$1f,$10,$10,$10,$10,$10,$10,$10,$ff,$10,$10,$10,$10,$10,$10,$10,$10,$10,$10,
-$10,$10,$00,$00,$00,$ff,$00,$00,$00,$00,$00,$00,$00,$1f,$10,$10,$10,$10,$00,$00,$00,$f0,$10,$10,$10,$10,
-$10,$10,$10,$1f,$00,$00,$00,$00,$10,$10,$10,$f0,$00,$00,$00,$00,$81,$42,$24,$18,$18,$24,$42,$81,$01,$02,
-$04,$08,$10,$20,$40,$80,$80,$40,$20,$10,$08,$04,$02,$01,$00,$10,$10,$ff,$10,$10,$00,$00,$00,$00,$00,$00,
-$00,$00,$00,$00,$20,$20,$20,$20,$00,$00,$20,$00,$50,$50,$50,$00,$00,$00,$00,$00,$50,$50,$f8,$50,$f8,$50,
-$50,$00,$20,$78,$a0,$70,$28,$f0,$20,$00,$c0,$c8,$10,$20,$40,$98,$18,$00,$40,$a0,$40,$a8,$90,$98,$60,$00,
-$10,$20,$40,$00,$00,$00,$00,$00,$10,$20,$40,$40,$40,$20,$10,$00,$40,$20,$10,$10,$10,$20,$40,$00,$88,$50,
-$20,$f8,$20,$50,$88,$00,$00,$20,$20,$f8,$20,$20,$00,$00,$00,$00,$00,$00,$00,$20,$20,$40,$00,$00,$00,$78,
-$00,$00,$00,$00,$00,$00,$00,$00,$00,$60,$60,$00,$00,$00,$08,$10,$20,$40,$80,$00,$70,$88,$98,$a8,$c8,$88,
-$70,$00,$20,$60,$a0,$20,$20,$20,$f8,$00,$70,$88,$08,$10,$60,$80,$f8,$00,$70,$88,$08,$30,$08,$88,$70,$00,
-$10,$30,$50,$90,$f8,$10,$10,$00,$f8,$80,$e0,$10,$08,$10,$e0,$00,$30,$40,$80,$f0,$88,$88,$70,$00,$f8,$88,
-$10,$20,$20,$20,$20,$00,$70,$88,$88,$70,$88,$88,$70,$00,$70,$88,$88,$78,$08,$10,$60,$00,$00,$00,$20,$00,
-$00,$20,$00,$00,$00,$00,$20,$00,$00,$20,$20,$40,$18,$30,$60,$c0,$60,$30,$18,$00,$00,$00,$f8,$00,$f8,$00,
-$00,$00,$c0,$60,$30,$18,$30,$60,$c0,$00,$70,$88,$08,$10,$20,$00,$20,$00,$70,$88,$08,$68,$a8,$a8,$70,$00,
-$20,$50,$88,$88,$f8,$88,$88,$00,$f0,$48,$48,$70,$48,$48,$f0,$00,$30,$48,$80,$80,$80,$48,$30,$00,$e0,$50,
-$48,$48,$48,$50,$e0,$00,$f8,$80,$80,$f0,$80,$80,$f8,$00,$f8,$80,$80,$f0,$80,$80,$80,$00,$70,$88,$80,$b8,
-$88,$88,$70,$00,$88,$88,$88,$f8,$88,$88,$88,$00,$70,$20,$20,$20,$20,$20,$70,$00,$38,$10,$10,$10,$90,$90,
-$60,$00,$88,$90,$a0,$c0,$a0,$90,$88,$00,$80,$80,$80,$80,$80,$80,$f8,$00,$88,$d8,$a8,$a8,$88,$88,$88,$00,
-$88,$c8,$c8,$a8,$98,$98,$88,$00,$70,$88,$88,$88,$88,$88,$70,$00,$f0,$88,$88,$f0,$80,$80,$80,$00,$70,$88,
-$88,$88,$a8,$90,$68,$00,$f0,$88,$88,$f0,$a0,$90,$88,$00,$70,$88,$80,$70,$08,$88,$70,$00,$f8,$20,$20,$20,
-$20,$20,$20,$00,$88,$88,$88,$88,$88,$88,$70,$00,$88,$88,$88,$88,$50,$50,$20,$00,$88,$88,$88,$a8,$a8,$d8,
-$88,$00,$88,$88,$50,$20,$50,$88,$88,$00,$88,$88,$88,$70,$20,$20,$20,$00,$f8,$08,$10,$20,$40,$80,$f8,$00,
-$70,$40,$40,$40,$40,$40,$70,$00,$00,$00,$80,$40,$20,$10,$08,$00,$70,$10,$10,$10,$10,$10,$70,$00,$20,$50,
-$88,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$f8,$00,$40,$20,$10,$00,$00,$00,$00,$00,$00,$00,$70,$08,
-$78,$88,$78,$00,$80,$80,$b0,$c8,$88,$c8,$b0,$00,$00,$00,$70,$88,$80,$88,$70,$00,$08,$08,$68,$98,$88,$98,
-$68,$00,$00,$00,$70,$88,$f8,$80,$70,$00,$10,$28,$20,$f8,$20,$20,$20,$00,$00,$00,$68,$98,$98,$68,$08,$70,
-$80,$80,$f0,$88,$88,$88,$88,$00,$20,$00,$60,$20,$20,$20,$70,$00,$10,$00,$30,$10,$10,$10,$90,$60,$40,$40,
-$48,$50,$60,$50,$48,$00,$60,$20,$20,$20,$20,$20,$70,$00,$00,$00,$d0,$a8,$a8,$a8,$a8,$00,$00,$00,$b0,$c8,
-$88,$88,$88,$00,$00,$00,$70,$88,$88,$88,$70,$00,$00,$00,$b0,$c8,$c8,$b0,$80,$80,$00,$00,$68,$98,$98,$68,
-$08,$08,$00,$00,$b0,$c8,$80,$80,$80,$00,$00,$00,$78,$80,$f0,$08,$f0,$00,$40,$40,$f0,$40,$40,$48,$30,$00,
-$00,$00,$90,$90,$90,$90,$68,$00,$00,$00,$88,$88,$88,$50,$20,$00,$00,$00,$88,$a8,$a8,$a8,$50,$00,$00,$00,
-$88,$50,$20,$50,$88,$00,$00,$00,$88,$88,$98,$68,$08,$70,$00,$00,$f8,$10,$20,$40,$f8,$00,$18,$20,$20,$40,
-$20,$20,$18,$00,$20,$20,$20,$00,$20,$20,$20,$00,$c0,$20,$20,$10,$20,$20,$c0,$00,$40,$a8,$10,$00,$00,$00,
-$00,$00,$00,$00,$20,$50,$f8,$00,$00,$00,$00,$00,$00,$00,$00,$00,$ff,$ff,$f0,$f0,$f0,$f0,$0f,$0f,$0f,$0f,
-$00,$00,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$00,$00,$00,$00,$00,$00,$00,$00,$00,$3c,$3c,$00,$00,$00,$ff,$ff,
-$ff,$ff,$ff,$ff,$00,$00,$c0,$c0,$c0,$c0,$c0,$c0,$c0,$c0,$0f,$0f,$0f,$0f,$f0,$f0,$f0,$f0,$fc,$fc,$fc,$fc,
-$fc,$fc,$fc,$fc,$03,$03,$03,$03,$03,$03,$03,$03,$3f,$3f,$3f,$3f,$3f,$3f,$3f,$3f,$11,$22,$44,$88,$11,$22,
-$44,$88,$88,$44,$22,$11,$88,$44,$22,$11,$fe,$7c,$38,$10,$00,$00,$00,$00,$00,$00,$00,$00,$10,$38,$7c,$fe,
-$80,$c0,$e0,$f0,$e0,$c0,$80,$00,$01,$03,$07,$0f,$07,$03,$01,$00,$ff,$7e,$3c,$18,$18,$3c,$7e,$ff,$81,$c3,
-$e7,$ff,$ff,$e7,$c3,$81,$f0,$f0,$f0,$f0,$00,$00,$00,$00,$00,$00,$00,$00,$0f,$0f,$0f,$0f,$0f,$0f,$0f,$0f,
-$00,$00,$00,$00,$00,$00,$00,$00,$f0,$f0,$f0,$f0,$33,$33,$cc,$cc,$33,$33,$cc,$cc,$00,$20,$20,$50,$50,$88,
-$f8,$00,$20,$20,$70,$20,$70,$20,$20,$00,$00,$00,$00,$50,$88,$a8,$50,$00,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,
-$00,$00,$00,$00,$ff,$ff,$ff,$ff,$f0,$f0,$f0,$f0,$f0,$f0,$f0,$f0,$0f,$0f,$0f,$0f,$0f,$0f,$0f,$0f,$ff,$ff,
-$ff,$ff,$00,$00,$00,$00,$00,$00,$68,$90,$90,$90,$68,$00,$30,$48,$48,$70,$48,$48,$70,$c0,$f8,$88,$80,$80,
-$80,$80,$80,$00,$00,$50,$70,$88,$f8,$80,$70,$00,$00,$00,$78,$80,$f0,$80,$78,$00,$00,$00,$78,$90,$90,$90,
-$60,$00,$20,$00,$60,$20,$20,$20,$70,$00,$50,$00,$70,$20,$20,$20,$70,$00,$f8,$20,$70,$a8,$a8,$70,$20,$f8,
-$20,$50,$88,$f8,$88,$50,$20,$00,$70,$88,$88,$88,$50,$50,$d8,$00,$30,$40,$40,$20,$50,$50,$50,$20,$00,$00,
-$00,$50,$a8,$a8,$50,$00,$08,$70,$a8,$a8,$a8,$70,$80,$00,$38,$40,$80,$f8,$80,$40,$38,$00,$70,$88,$88,$88,
-$88,$88,$88,$00,$00,$f8,$00,$f8,$00,$f8,$00,$00,$20,$20,$f8,$20,$20,$00,$f8,$00,$c0,$30,$08,$30,$c0,$00,
-$f8,$00,$50,$f8,$80,$f0,$80,$80,$f8,$00,$78,$80,$80,$f0,$80,$80,$78,$00,$20,$20,$20,$20,$20,$20,$a0,$40,
-$70,$20,$20,$20,$20,$20,$70,$00,$50,$70,$20,$20,$20,$20,$70,$00,$00,$18,$24,$24,$18,$00,$00,$00,$00,$30,
-$78,$78,$30,$00,$00,$00,$00,$00,$00,$00,$30,$00,$00,$00,$3e,$20,$20,$20,$a0,$60,$20,$00,$a0,$50,$50,$50,
-$00,$00,$00,$00,$40,$a0,$20,$40,$e0,$00,$00,$00,$00,$38,$38,$38,$38,$38,$38,$00,$3c,$42,$99,$a1,$a1,$99,
-$42,$3c,$00,$00,$90,$a8,$e8,$a8,$90,$00,$00,$00,$60,$10,$70,$90,$68,$00,$00,$00,$f0,$80,$f0,$88,$f0,$00,
-$00,$00,$90,$90,$90,$f8,$08,$00,$00,$00,$30,$50,$50,$70,$88,$00,$00,$00,$70,$88,$f8,$80,$70,$00,$00,$20,
-$70,$a8,$a8,$70,$20,$00,$00,$00,$78,$48,$40,$40,$40,$00,$00,$00,$88,$50,$20,$50,$88,$00,$00,$00,$88,$98,
-$a8,$c8,$88,$00,$00,$50,$20,$00,$98,$a8,$c8,$00,$00,$00,$90,$a0,$c0,$a0,$90,$00,$00,$00,$38,$28,$28,$48,
-$88,$00,$00,$00,$88,$d8,$a8,$88,$88,$00,$00,$00,$88,$88,$f8,$88,$88,$00,$00,$00,$70,$88,$88,$88,$70,$00,
-$00,$00,$78,$48,$48,$48,$48,$00,$00,$00,$78,$88,$78,$28,$48,$00,$00,$00,$f0,$88,$f0,$80,$80,$00,$00,$00,
-$78,$80,$80,$80,$78,$00,$00,$00,$f8,$20,$20,$20,$20,$00,$00,$00,$88,$50,$20,$40,$80,$00,$00,$00,$a8,$70,
-$20,$70,$a8,$00,$00,$00,$f0,$48,$70,$48,$f0,$00,$00,$00,$40,$40,$70,$48,$70,$00,$00,$00,$88,$88,$c8,$a8,
-$c8,$00,$00,$00,$f0,$08,$70,$08,$f0,$00,$00,$00,$a8,$a8,$a8,$a8,$f8,$00,$00,$00,$70,$88,$38,$88,$70,$00,
-$00,$00,$a8,$a8,$a8,$f8,$08,$00,$00,$00,$48,$48,$78,$08,$08,$00,$00,$00,$c0,$40,$70,$48,$70,$00,$90,$a8,
-$a8,$e8,$a8,$a8,$90,$00,$20,$50,$88,$88,$f8,$88,$88,$00,$f8,$88,$80,$f0,$88,$88,$f0,$00,$90,$90,$90,$90,
-$90,$f8,$08,$00,$38,$28,$28,$48,$48,$f8,$88,$00,$f8,$80,$80,$f0,$80,$80,$f8,$00,$20,$70,$a8,$a8,$a8,$70,
-$20,$00,$f8,$88,$88,$80,$80,$80,$80,$00,$88,$88,$50,$20,$50,$88,$88,$00,$88,$88,$98,$a8,$c8,$88,$88,$00,
-$50,$20,$88,$98,$a8,$c8,$88,$00,$88,$90,$a0,$c0,$a0,$90,$88,$00,$18,$28,$48,$48,$48,$48,$88,$00,$88,$d8,
-$a8,$a8,$88,$88,$88,$00,$88,$88,$88,$f8,$88,$88,$88,$00,$70,$88,$88,$88,$88,$88,$70,$00,$f8,$88,$88,$88,
-$88,$88,$88,$00,$78,$88,$88,$78,$28,$48,$88,$00,$f0,$88,$88,$f0,$80,$80,$80,$00,$70,$88,$80,$80,$80,$88,
-$70,$00,$f8,$20,$20,$20,$20,$20,$20,$00,$88,$88,$88,$50,$20,$40,$80,$00,$a8,$a8,$70,$20,$70,$a8,$a8,$00,
-$f0,$48,$48,$70,$48,$48,$f0,$00,$80,$80,$80,$f0,$88,$88,$f0,$00,$88,$88,$88,$c8,$a8,$a8,$c8,$00,$f0,$08,
-$08,$30,$08,$08,$f0,$00,$a8,$a8,$a8,$a8,$a8,$a8,$f8,$00,$70,$88,$08,$78,$08,$88,$70,$00,$a8,$a8,$a8,$a8,
-$a8,$f8,$08,$00,$88,$88,$88,$88,$78,$08,$08,$00,$c0,$40,$40,$70,$48,$48,$70,$00
-);
-
-const kgiFont8: array[0..256*8-1] of Byte  = (
-$00,$00,$00,$00,$00,$00,$00,$00,$7e,$81,$a5,$81,$bd,$99,$81,$7e,$7e,$ff,$db,$ff,$c3,$e7,$ff,$7e,$6c,$fe,
-$fe,$fe,$7c,$38,$10,$00,$10,$38,$7c,$fe,$7c,$38,$10,$00,$38,$7c,$38,$fe,$fe,$d6,$10,$38,$10,$10,$38,$7c,
-$fe,$7c,$10,$38,$00,$00,$18,$3c,$3c,$18,$00,$00,$ff,$ff,$e7,$c3,$c3,$e7,$ff,$ff,$00,$3c,$66,$42,$42,$66,
-$3c,$00,$ff,$c3,$99,$bd,$bd,$99,$c3,$ff,$0f,$07,$0f,$7d,$cc,$cc,$cc,$78,$3c,$66,$66,$66,$3c,$18,$7e,$18,
-$3f,$33,$3f,$30,$30,$70,$f0,$e0,$7f,$63,$7f,$63,$63,$67,$e6,$c0,$99,$5a,$3c,$e7,$e7,$3c,$5a,$99,$80,$e0,
-$f8,$fe,$f8,$e0,$80,$00,$02,$0e,$3e,$fe,$3e,$0e,$02,$00,$18,$3c,$7e,$18,$18,$7e,$3c,$18,$66,$66,$66,$66,
-$66,$00,$66,$00,$7f,$db,$db,$7b,$1b,$1b,$1b,$00,$7e,$c3,$78,$cc,$cc,$78,$8c,$f8,$00,$00,$00,$00,$7e,$7e,
-$7e,$00,$18,$3c,$7e,$18,$7e,$3c,$18,$ff,$18,$3c,$7e,$18,$18,$18,$18,$00,$18,$18,$18,$18,$7e,$3c,$18,$00,
-$00,$18,$0c,$fe,$0c,$18,$00,$00,$00,$30,$60,$fe,$60,$30,$00,$00,$00,$00,$c0,$c0,$c0,$fe,$00,$00,$00,$24,
-$66,$ff,$66,$24,$00,$00,$00,$18,$3c,$7e,$ff,$ff,$00,$00,$00,$ff,$ff,$7e,$3c,$18,$00,$00,$00,$00,$00,$00,
-$00,$00,$00,$00,$30,$78,$78,$30,$30,$00,$30,$00,$6c,$6c,$6c,$00,$00,$00,$00,$00,$6c,$6c,$fe,$6c,$fe,$6c,
-$6c,$00,$30,$7c,$c0,$78,$0c,$f8,$30,$00,$00,$c6,$cc,$18,$30,$66,$c6,$00,$38,$6c,$38,$76,$dc,$cc,$76,$00,
-$60,$60,$c0,$00,$00,$00,$00,$00,$18,$30,$60,$60,$60,$30,$18,$00,$60,$30,$18,$18,$18,$30,$60,$00,$00,$66,
-$3c,$ff,$3c,$66,$00,$00,$00,$30,$30,$fc,$30,$30,$00,$00,$00,$00,$00,$00,$00,$70,$30,$60,$00,$00,$00,$fc,
-$00,$00,$00,$00,$00,$00,$00,$00,$00,$30,$30,$00,$06,$0c,$18,$30,$60,$c0,$80,$00,$78,$cc,$dc,$fc,$ec,$cc,
-$78,$00,$30,$f0,$30,$30,$30,$30,$fc,$00,$78,$cc,$0c,$38,$60,$cc,$fc,$00,$78,$cc,$0c,$38,$0c,$cc,$78,$00,
-$1c,$3c,$6c,$cc,$fe,$0c,$0c,$00,$fc,$c0,$f8,$0c,$0c,$cc,$78,$00,$38,$60,$c0,$f8,$cc,$cc,$78,$00,$fc,$cc,
-$0c,$18,$30,$60,$60,$00,$78,$cc,$cc,$78,$cc,$cc,$78,$00,$78,$cc,$cc,$7c,$0c,$18,$70,$00,$00,$00,$30,$30,
-$00,$30,$30,$00,$00,$00,$30,$30,$00,$70,$30,$60,$18,$30,$60,$c0,$60,$30,$18,$00,$00,$00,$fc,$00,$fc,$00,
-$00,$00,$60,$30,$18,$0c,$18,$30,$60,$00,$78,$cc,$0c,$18,$30,$00,$30,$00,$7c,$c6,$de,$de,$de,$c0,$78,$00,
-$30,$78,$cc,$cc,$fc,$cc,$cc,$00,$fc,$66,$66,$7c,$66,$66,$fc,$00,$3c,$66,$c0,$c0,$c0,$66,$3c,$00,$fc,$6c,
-$66,$66,$66,$6c,$fc,$00,$fe,$62,$68,$78,$68,$62,$fe,$00,$fe,$62,$68,$78,$68,$60,$f0,$00,$3c,$66,$c0,$c0,
-$ce,$66,$3e,$00,$cc,$cc,$cc,$fc,$cc,$cc,$cc,$00,$78,$30,$30,$30,$30,$30,$78,$00,$1e,$0c,$0c,$0c,$cc,$cc,
-$78,$00,$e6,$66,$6c,$78,$6c,$66,$e6,$00,$f0,$60,$60,$60,$62,$66,$fe,$00,$c6,$ee,$fe,$d6,$c6,$c6,$c6,$00,
-$c6,$e6,$f6,$de,$ce,$c6,$c6,$00,$38,$6c,$c6,$c6,$c6,$6c,$38,$00,$fc,$66,$66,$7c,$60,$60,$f0,$00,$78,$cc,
-$cc,$cc,$dc,$78,$1c,$00,$fc,$66,$66,$7c,$78,$6c,$e6,$00,$78,$cc,$e0,$38,$1c,$cc,$78,$00,$fc,$b4,$30,$30,
-$30,$30,$78,$00,$cc,$cc,$cc,$cc,$cc,$cc,$fc,$00,$cc,$cc,$cc,$cc,$cc,$78,$30,$00,$c6,$c6,$c6,$d6,$fe,$ee,
-$c6,$00,$c6,$c6,$6c,$38,$6c,$c6,$c6,$00,$cc,$cc,$cc,$78,$30,$30,$78,$00,$fe,$cc,$98,$30,$62,$c6,$fe,$00,
-$78,$60,$60,$60,$60,$60,$78,$00,$c0,$60,$30,$18,$0c,$06,$02,$00,$78,$18,$18,$18,$18,$18,$78,$00,$10,$38,
-$6c,$c6,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$ff,$30,$30,$18,$00,$00,$00,$00,$00,$00,$00,$78,$0c,
-$7c,$cc,$76,$00,$e0,$60,$7c,$66,$66,$66,$bc,$00,$00,$00,$78,$cc,$c0,$cc,$78,$00,$1c,$0c,$0c,$7c,$cc,$cc,
-$76,$00,$00,$00,$78,$cc,$fc,$c0,$78,$00,$38,$6c,$60,$f0,$60,$60,$f0,$00,$00,$00,$76,$cc,$cc,$7c,$0c,$f8,
-$e0,$60,$6c,$76,$66,$66,$e6,$00,$30,$00,$70,$30,$30,$30,$78,$00,$18,$00,$78,$18,$18,$18,$d8,$70,$e0,$60,
-$66,$6c,$78,$6c,$e6,$00,$70,$30,$30,$30,$30,$30,$78,$00,$00,$00,$ec,$fe,$d6,$c6,$c6,$00,$00,$00,$f8,$cc,
-$cc,$cc,$cc,$00,$00,$00,$78,$cc,$cc,$cc,$78,$00,$00,$00,$dc,$66,$66,$7c,$60,$f0,$00,$00,$76,$cc,$cc,$7c,
-$0c,$1e,$00,$00,$d8,$6c,$6c,$60,$f0,$00,$00,$00,$7c,$c0,$78,$0c,$f8,$00,$10,$30,$7c,$30,$30,$34,$18,$00,
-$00,$00,$cc,$cc,$cc,$cc,$76,$00,$00,$00,$cc,$cc,$cc,$78,$30,$00,$00,$00,$c6,$c6,$d6,$fe,$6c,$00,$00,$00,
-$c6,$6c,$38,$6c,$c6,$00,$00,$00,$cc,$cc,$cc,$7c,$0c,$f8,$00,$00,$fc,$98,$30,$64,$fc,$00,$1c,$30,$30,$e0,
-$30,$30,$1c,$00,$18,$18,$18,$00,$18,$18,$18,$00,$e0,$30,$30,$1c,$30,$30,$e0,$00,$76,$dc,$00,$00,$00,$00,
-$00,$00,$10,$38,$6c,$c6,$c6,$c6,$fe,$00,$78,$cc,$c0,$cc,$78,$18,$0c,$78,$00,$cc,$00,$cc,$cc,$cc,$7e,$00,
-$1c,$00,$78,$cc,$fc,$c0,$78,$00,$7e,$c3,$3c,$06,$3e,$66,$3f,$00,$cc,$00,$78,$0c,$7c,$cc,$7e,$00,$e0,$00,
-$78,$0c,$7c,$cc,$7e,$00,$30,$30,$78,$0c,$7c,$cc,$7e,$00,$00,$00,$7c,$c0,$c0,$7c,$06,$3c,$7e,$c3,$3c,$66,
-$7e,$60,$3c,$00,$cc,$00,$78,$cc,$fc,$c0,$78,$00,$e0,$00,$78,$cc,$fc,$c0,$78,$00,$cc,$00,$70,$30,$30,$30,
-$78,$00,$7c,$c6,$38,$18,$18,$18,$3c,$00,$e0,$00,$70,$30,$30,$30,$78,$00,$cc,$30,$78,$cc,$cc,$fc,$cc,$00,
-$30,$30,$00,$78,$cc,$fc,$cc,$00,$1c,$00,$fc,$60,$78,$60,$fc,$00,$00,$00,$7f,$0c,$7f,$cc,$7f,$00,$3e,$6c,
-$cc,$fe,$cc,$cc,$ce,$00,$78,$cc,$00,$78,$cc,$cc,$78,$00,$00,$cc,$00,$78,$cc,$cc,$78,$00,$00,$e0,$00,$78,
-$cc,$cc,$78,$00,$78,$cc,$00,$cc,$cc,$cc,$7e,$00,$00,$e0,$00,$cc,$cc,$cc,$7e,$00,$00,$cc,$00,$cc,$cc,$fc,
-$0c,$f8,$c6,$38,$7c,$c6,$c6,$7c,$38,$00,$cc,$00,$cc,$cc,$cc,$cc,$78,$00,$18,$18,$7e,$c0,$c0,$7e,$18,$18,
-$38,$6c,$64,$f0,$60,$e6,$fc,$00,$cc,$cc,$78,$fc,$30,$fc,$30,$00,$f0,$d8,$d8,$f4,$cc,$de,$cc,$0e,$0e,$1b,
-$18,$7e,$18,$18,$d8,$70,$1c,$00,$78,$0c,$7c,$cc,$7e,$00,$38,$00,$70,$30,$30,$30,$78,$00,$00,$1c,$00,$78,
-$cc,$cc,$78,$00,$00,$1c,$00,$cc,$cc,$cc,$7e,$00,$00,$f8,$00,$f8,$cc,$cc,$cc,$00,$fc,$00,$cc,$ec,$fc,$dc,
-$cc,$00,$3c,$6c,$6c,$3e,$00,$7e,$00,$00,$3c,$66,$66,$3c,$00,$7e,$00,$00,$30,$00,$30,$60,$c0,$cc,$78,$00,
-$00,$00,$00,$fc,$c0,$c0,$00,$00,$00,$00,$00,$fc,$0c,$0c,$00,$00,$c6,$cc,$d8,$3e,$63,$ce,$98,$1f,$c6,$cc,
-$d8,$f3,$67,$cf,$9f,$03,$00,$18,$00,$18,$18,$3c,$3c,$18,$00,$33,$66,$cc,$66,$33,$00,$00,$00,$cc,$66,$33,
-$66,$cc,$00,$00,$22,$88,$22,$88,$22,$88,$22,$88,$55,$aa,$55,$aa,$55,$aa,$55,$aa,$dc,$76,$dc,$76,$dc,$76,
-$dc,$76,$18,$18,$18,$18,$18,$18,$18,$18,$18,$18,$18,$18,$f8,$18,$18,$18,$18,$18,$f8,$18,$f8,$18,$18,$18,
-$36,$36,$36,$36,$f6,$36,$36,$36,$00,$00,$00,$00,$fe,$36,$36,$36,$00,$00,$f8,$18,$f8,$18,$18,$18,$36,$36,
-$f6,$06,$f6,$36,$36,$36,$36,$36,$36,$36,$36,$36,$36,$36,$00,$00,$fe,$06,$f6,$36,$36,$36,$36,$36,$f6,$06,
-$fe,$00,$00,$00,$36,$36,$36,$36,$fe,$00,$00,$00,$18,$18,$f8,$18,$f8,$00,$00,$00,$00,$00,$00,$00,$f8,$18,
-$18,$18,$18,$18,$18,$18,$1f,$00,$00,$00,$18,$18,$18,$18,$ff,$00,$00,$00,$00,$00,$00,$00,$ff,$18,$18,$18,
-$18,$18,$18,$18,$1f,$18,$18,$18,$00,$00,$00,$00,$ff,$00,$00,$00,$18,$18,$18,$18,$ff,$18,$18,$18,$18,$18,
-$1f,$18,$1f,$18,$18,$18,$36,$36,$36,$36,$37,$36,$36,$36,$36,$36,$37,$30,$3f,$00,$00,$00,$00,$00,$3f,$30,
-$37,$36,$36,$36,$36,$36,$f7,$00,$ff,$00,$00,$00,$00,$00,$ff,$00,$f7,$36,$36,$36,$36,$36,$37,$30,$37,$36,
-$36,$36,$00,$00,$ff,$00,$ff,$00,$00,$00,$36,$36,$f7,$00,$f7,$36,$36,$36,$18,$18,$ff,$00,$ff,$00,$00,$00,
-$36,$36,$36,$36,$ff,$00,$00,$00,$00,$00,$ff,$00,$ff,$18,$18,$18,$00,$00,$00,$00,$ff,$36,$36,$36,$36,$36,
-$36,$36,$3f,$00,$00,$00,$18,$18,$1f,$18,$1f,$00,$00,$00,$00,$00,$1f,$18,$1f,$18,$18,$18,$00,$00,$00,$00,
-$3f,$36,$36,$36,$36,$36,$36,$36,$f7,$36,$36,$36,$18,$18,$ff,$00,$ff,$18,$18,$18,$18,$18,$18,$18,$f8,$00,
-$00,$00,$00,$00,$00,$00,$1f,$18,$18,$18,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$00,$00,$00,$00,$ff,$ff,$ff,$ff,
-$f0,$f0,$f0,$f0,$f0,$f0,$f0,$f0,$0f,$0f,$0f,$0f,$0f,$0f,$0f,$0f,$ff,$ff,$ff,$ff,$00,$00,$00,$00,$00,$00,
-$76,$dc,$c8,$dc,$76,$00,$00,$78,$cc,$f8,$cc,$f8,$c0,$c0,$00,$fe,$c6,$c0,$c0,$c0,$c0,$00,$00,$fe,$6c,$6c,
-$6c,$6c,$6c,$00,$fe,$66,$30,$18,$30,$66,$fe,$00,$00,$00,$7e,$cc,$cc,$cc,$78,$00,$00,$66,$66,$66,$66,$7c,
-$60,$c0,$00,$76,$dc,$18,$18,$18,$18,$00,$fc,$30,$78,$cc,$cc,$78,$30,$fc,$38,$6c,$c6,$fe,$c6,$6c,$38,$00,
-$38,$6c,$c6,$c6,$6c,$6c,$ee,$00,$1c,$30,$18,$7c,$cc,$cc,$78,$00,$00,$00,$7e,$db,$db,$7e,$00,$00,$06,$0c,
-$7e,$db,$db,$7e,$60,$c0,$3c,$60,$c0,$fc,$c0,$60,$3c,$00,$78,$cc,$cc,$cc,$cc,$cc,$cc,$00,$00,$fc,$00,$fc,
-$00,$fc,$00,$00,$30,$30,$fc,$30,$30,$00,$fc,$00,$60,$30,$18,$30,$60,$00,$fc,$00,$18,$30,$60,$30,$18,$00,
-$fc,$00,$0e,$1b,$1b,$18,$18,$18,$18,$18,$18,$18,$18,$18,$18,$d8,$d8,$70,$30,$30,$00,$fc,$00,$30,$30,$00,
-$00,$72,$9c,$00,$72,$9c,$00,$00,$38,$6c,$6c,$38,$00,$00,$00,$00,$00,$00,$00,$18,$18,$00,$00,$00,$00,$00,
-$00,$00,$18,$00,$00,$00,$0f,$0c,$0c,$0c,$ec,$6c,$3c,$1c,$78,$6c,$6c,$6c,$6c,$00,$00,$00,$78,$0c,$38,$60,
-$7c,$00,$00,$00,$00,$00,$3c,$3c,$3c,$3c,$00,$00,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff
-);
-
-const kgiFont6PropWidth: array[0..256-1] of Byte = (
-  $08,$08,$08,$07,$07,$07,$07,$04,$08,$07,$08,$08,$06,$06,$06,$07,
-  $06,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,
-  $85,$21,$13,$05,$05,$05,$05,$13,$13,$13,$05,$05,$12,$14,$12,$05,
-  $05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$21,$12,$05,$05,$05,$05,
-  $05,$05,$05,$05,$05,$05,$05,$05,$05,$13,$05,$05,$05,$05,$05,$05,
-  $05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$13,$05,$13,$05,$05,
-  $13,$05,$05,$05,$05,$05,$05,$05,$05,$13,$04,$14,$13,$05,$05,$05,
-  $05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$14,$21,$04,$05,$08,
-  $08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$04,
-  $44,$08,$08,$08,$08,$08,$08,$08,$05,$04,$05,$08,$08,$08,$08,$08,
-  $05,$05,$05,$05,$05,$05,$13,$13,$05,$05,$05,$04,$05,$05,$05,$05,
-  $05,$05,$05,$05,$05,$03,$04,$04,$06,$05,$04,$07,$04,$03,$05,$08,
-  $05,$05,$05,$05,$05,$05,$05,$14,$05,$05,$05,$04,$05,$05,$05,$05,
-  $14,$05,$05,$05,$05,$05,$05,$05,$14,$05,$05,$05,$05,$05,$14,$05,
-  $05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,
-  $05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$05
-);
-
-const kgiFont8PropWidth: array[0..256-1] of Byte = (
-  $08,$08,$08,$07,$07,$07,$07,$06,$08,$07,$08,$08,$07,$08,$08,$08,
-  $07,$07,$07,$07,$08,$08,$07,$08,$07,$07,$07,$07,$07,$08,$08,$08,
-  $85,$14,$15,$07,$06,$07,$07,$03,$14,$14,$08,$06,$13,$06,$22,$07,
-  $05,$05,$05,$05,$05,$05,$05,$05,$05,$05,$22,$13,$05,$06,$15,$06,
-  $07,$06,$07,$07,$07,$07,$07,$07,$06,$14,$07,$07,$07,$07,$07,$07,
-  $07,$06,$07,$06,$06,$06,$06,$07,$07,$06,$07,$14,$07,$14,$07,$08,
-  $23,$07,$07,$06,$07,$06,$06,$07,$07,$14,$05,$07,$14,$07,$06,$06,
-  $07,$07,$06,$06,$15,$07,$06,$07,$07,$06,$06,$06,$32,$06,$07,$07,
-  $06,$07,$06,$08,$07,$07,$07,$07,$08,$06,$06,$06,$07,$05,$06,$06,
-  $06,$08,$07,$06,$06,$06,$07,$07,$06,$07,$06,$07,$07,$06,$07,$08,
-  $07,$05,$06,$07,$06,$06,$16,$16,$06,$06,$06,$08,$08,$06,$08,$08,
-  $08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,$08,
-  $38,$08,$08,$38,$08,$08,$38,$28,$28,$28,$08,$08,$28,$08,$08,$08,
-  $08,$08,$08,$28,$38,$38,$28,$08,$08,$08,$38,$08,$08,$08,$48,$08,
-  $07,$06,$07,$07,$07,$07,$07,$07,$06,$07,$07,$06,$08,$08,$06,$06,
-  $06,$06,$06,$06,$35,$05,$06,$07,$15,$32,$32,$08,$15,$15,$24,$08
-);
-
-
-function createFontTexture (constref font: array of Byte; constref fontwdt: array of Byte; prop: Boolean): GLuint;
+type
+  TGxBmpFont = class(TGxFont)
+  private
+    mTexId: GLuint; // OpenGL texture id
+    mWidth: Integer; // <=0: proportional
+    mFontBmp: PByte;
+    mFontWdt: PByte;
+    mFreeFontWdt: Boolean;
+    mFreeFontBmp: Boolean;
+
+  protected
+    procedure oglCreateTexture ();
+    procedure oglDestroyTexture ();
+
+    procedure initDrawText ();
+    procedure doneDrawText ();
+    function drawCharInterim (x, y: Integer; const ch: AnsiChar): Integer; // return width (not including last empty pixel)
+    function drawCharInternal (x, y: Integer; const ch: AnsiChar): Integer; // return width (not including last empty pixel)
+    function drawTextInternal (x, y: Integer; const s: AnsiString): Integer; // return width (not including last empty pixel)
+
+  public
+    constructor Create (const aname: AnsiString; st: TStream; proportional: Boolean);
+    destructor Destroy (); override;
+
+    function charWidth (const ch: AnsiChar): Integer; override;
+    function textWidth (const s: AnsiString): Integer; override;
+  end;
+
+
+constructor TGxBmpFont.Create (const aname: AnsiString; st: TStream; proportional: Boolean);
+var
+  sign: packed array [0..7] of AnsiChar;
+  enc: packed array [0..16] of AnsiChar;
+  b: Byte;
+  wdt, hgt, elen: Integer;
+  ch, dy: Integer;
+  fntbwdt: Integer;
+  wrd: Word;
+begin
+  mFreeFontBmp := true;
+  mFreeFontWdt := true;
+  mName := aname;
+  mTexId := 0;
+  // signature
+  st.ReadBuffer(sign[0], 8);
+  if (sign <> 'FUIFONT0') then raise Exception.Create('FlexUI: invalid font file signature');
+  // encoding length and width
+  st.ReadBuffer(b, 1);
+  wdt := (b and $0f)+1; // 16 is not supported
+  if (wdt = 16) then raise Exception.Create('FlexUI: 16-wdt fonts aren''t supported yet');
+  elen := ((b shr 4) and $0f);
+  if (elen = 0) then raise Exception.CreateFmt('FlexUI: invalid font encoding length: %d', [elen]);
+  // height
+  st.ReadBuffer(b, 1);
+  hgt := b;
+  if (hgt < 2) then raise Exception.CreateFmt('FlexUI: invalid font height: %d', [hgt]);
+  // encoding
+  st.ReadBuffer(enc[0], elen);
+  // check for 'cp1251' here (it can also be 'koi8')
+  if (wdt <= 8) then fntbwdt := 1 else fntbwdt := 2;
+  // shift and width table (hi nibble: left shift for proportional print; lo nibble: shifted character width for proportional print)
+  GetMem(mFontWdt, 256);
+  st.ReadBuffer(mFontWdt^, 256);
+  // font bitmap
+  GetMem(mFontBmp, (hgt*fntbwdt)*256);
+  st.ReadBuffer(mFontBmp^, (hgt*fntbwdt)*256);
+  mWidth := wdt;
+  mHeight := hgt;
+  mBaseLine := hgt-1; //FIXME
+  if (proportional) then
+  begin
+    // shift font
+    for ch := 0 to 255 do
+    begin
+      for dy := 0 to hgt-1 do
+      begin
+        if (fntbwdt = 1) then
+        begin
+          mFontBmp[ch*hgt+dy] := mFontBmp[ch*hgt+dy] shl (mFontWdt[ch] shr 4);
+        end
+        else
+        begin
+          wrd := mFontBmp[ch*(hgt*2)+(dy*2)]+256*mFontBmp[ch*(hgt*2)+(dy*2)+1];
+          wrd := wrd shl (mFontWdt[ch] shr 4);
+          mFontBmp[ch*(hgt*2)+(dy*2)+0] := (wrd and $ff);
+          mFontBmp[ch*(hgt*2)+(dy*2)+1] := ((wrd shr 16) and $ff);
+        end;
+      end;
+    end;
+  end
+  else
+  begin
+    FillChar(mFontWdt^, 256, wdt);
+  end;
+end;
+
+
+destructor TGxBmpFont.Destroy ();
+begin
+  if (mFreeFontBmp) and (mFontBmp <> nil) then FreeMem(mFontBmp);
+  if (mFreeFontWdt) and (mFontWdt <> nil) then FreeMem(mFontWdt);
+  mName := '';
+  mWidth := 0;
+  mHeight := 0;
+  mBaseLine := 0;
+  mFontBmp := nil;
+  mFontWdt := nil;
+  mFreeFontWdt := false;
+  mFreeFontBmp := false;
+  mTexId := 0;
+  inherited;
+end;
+
+
+procedure TGxBmpFont.oglCreateTexture ();
 const
-  Width = 16*8;
-  Height = 16*8;
+  TxWidth = 16*16;
+  TxHeight = 16*16;
 var
   tex, tpp: PByte;
   b: Byte;
   cc: Integer;
   x, y, dx, dy: Integer;
 begin
-  GetMem(tex, Width*Height*4);
+  GetMem(tex, TxWidth*TxHeight*4);
+  FillChar(tex^, TxWidth*TxHeight*4, 0);
 
   for cc := 0 to 255 do
   begin
-    x := (cc mod 16)*8;
-    y := (cc div 16)*8;
-    for dy := 0 to 7 do
+    x := (cc mod 16)*16;
+    y := (cc div 16)*16;
+    for dy := 0 to mHeight-1 do
     begin
-      b := font[cc*8+dy];
-      if prop then b := b shl (fontwdt[cc] shr 4);
-      tpp := tex+((y+dy)*(Width*4))+x*4;
+      if (mWidth <= 8) then b := mFontBmp[cc*mHeight+dy] else b := mFontBmp[cc*(mHeight*2)+(dy*2)+1];
+      //if prop then b := b shl (fontwdt[cc] shr 4);
+      tpp := tex+((y+dy)*(TxWidth*4))+x*4;
       for dx := 0 to 7 do
       begin
         if ((b and $80) <> 0) then
@@ -533,264 +506,457 @@ begin
         end;
         b := (b and $7f) shl 1;
       end;
+      if (mWidth > 8) then
+      begin
+        b := mFontBmp[cc*(mHeight*2)+(dy*2)+0];
+        for dx := 0 to 7 do
+        begin
+          if ((b and $80) <> 0) then
+          begin
+            tpp^ := 255; Inc(tpp);
+            tpp^ := 255; Inc(tpp);
+            tpp^ := 255; Inc(tpp);
+            tpp^ := 255; Inc(tpp);
+          end
+          else
+          begin
+            tpp^ := 0; Inc(tpp);
+            tpp^ := 0; Inc(tpp);
+            tpp^ := 0; Inc(tpp);
+            tpp^ := 0; Inc(tpp);
+          end;
+          b := (b and $7f) shl 1;
+        end;
+      end;
     end;
   end;
 
-  glGenTextures(1, @result);
-  if (result = 0) then raise Exception.Create('can''t create Holmes font texture');
+  glGenTextures(1, @mTexId);
+  if (mTexId = 0) then raise Exception.Create('can''t create FlexUI font texture');
 
-  glBindTexture(GL_TEXTURE_2D, result);
+  glBindTexture(GL_TEXTURE_2D, mTexId);
   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 
-  //GLfloat[4] bclr = 0.0;
-  //glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, bclr.ptr);
+  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TxWidth, TxHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, tex);
+  glFinish();
+
+  glBindTexture(GL_TEXTURE_2D, 0);
+  FreeMem(tex);
+end;
+
+
+procedure TGxBmpFont.oglDestroyTexture ();
+begin
+  if (mTexId <> 0) then
+  begin
+    glDeleteTextures(1, @mTexId);
+    mTexId := 0;
+  end;
+end;
 
-  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, Width, Height, 0, GL_RGBA{gltt}, GL_UNSIGNED_BYTE, tex);
-  glFlush();
 
-  //FreeMem(tex);
+function TGxBmpFont.charWidth (const ch: AnsiChar): Integer;
+begin
+  result := (mFontWdt[Byte(ch)] and $0f);
 end;
 
 
+function TGxBmpFont.textWidth (const s: AnsiString): Integer;
 var
-  font6texid: GLuint = 0;
-  font8texid: GLuint = 0;
-  prfont6texid: GLuint = 0;
-  prfont8texid: GLuint = 0;
+  ch: AnsiChar;
+begin
+  if (Length(s) > 0) then
+  begin
+    result := -1;
+    for ch in s do result += (mFontWdt[Byte(ch)] and $0f)+1;
+  end
+  else
+  begin
+    result := 0;
+  end;
+end;
 
 
-procedure deleteFonts ();
+procedure TGxBmpFont.initDrawText ();
 begin
-  if (font6texid <> 0) then glDeleteTextures(1, @font6texid);
-  if (font8texid <> 0) then glDeleteTextures(1, @font8texid);
-  if (prfont6texid <> 0) then glDeleteTextures(1, @prfont6texid);
-  if (prfont8texid <> 0) then glDeleteTextures(1, @prfont8texid);
-  font6texid := 0;
-  font8texid := 0;
-  prfont6texid := 0;
-  prfont8texid := 0;
+  glEnable(GL_ALPHA_TEST);
+  glAlphaFunc(GL_NOTEQUAL, 0.0);
+  glEnable(GL_TEXTURE_2D);
+  glBindTexture(GL_TEXTURE_2D, mTexId);
 end;
 
 
-procedure createFonts ();
+procedure TGxBmpFont.doneDrawText ();
 begin
-  if (font6texid = 0) then font6texid := createFontTexture(kgiFont6, kgiFont6PropWidth, false);
-  if (font8texid = 0) then font8texid := createFontTexture(kgiFont8, kgiFont8PropWidth, false);
-  if (prfont6texid = 0) then prfont6texid := createFontTexture(kgiFont6, kgiFont6PropWidth, true);
-  if (prfont8texid = 0) then prfont8texid := createFontTexture(kgiFont8, kgiFont8PropWidth, true);
+  glDisable(GL_ALPHA_TEST);
+  glDisable(GL_TEXTURE_2D);
+  glBindTexture(GL_TEXTURE_2D, 0);
 end;
 
 
-// ////////////////////////////////////////////////////////////////////////// //
-procedure TScissorSave.save (enableScissoring: Boolean);
+function TGxBmpFont.drawCharInterim (x, y: Integer; const ch: AnsiChar): Integer;
+var
+  tx, ty: Integer;
 begin
-  wassc := (glIsEnabled(GL_SCISSOR_TEST) <> 0);
-  if wassc then glGetIntegerv(GL_SCISSOR_BOX, @scxywh[0]) else glGetIntegerv(GL_VIEWPORT, @scxywh[0]);
-  //conwritefln('(%d,%d)-(%d,%d)', [scxywh[0], scxywh[1], scxywh[2], scxywh[3]]);
-  if enableScissoring and (not wassc) then glEnable(GL_SCISSOR_TEST);
+  tx := (Integer(ch) mod 16)*16;
+  ty := (Integer(ch) div 16)*16;
+  glBegin(GL_QUADS);
+    glTexCoord2f((tx+0)/256.0, (ty+0)/256.0); glVertex2i(x+0, y+0); // top-left
+    glTexCoord2f((tx+mWidth)/256.0, (ty+0)/256.0); glVertex2i(x+mWidth, y+0); // top-right
+    glTexCoord2f((tx+mWidth)/256.0, (ty+mHeight)/256.0); glVertex2i(x+mWidth, y+mHeight); // bottom-right
+    glTexCoord2f((tx+0)/256.0, (ty+mHeight)/256.0); glVertex2i(x+0, y+mHeight); // bottom-left
+  glEnd();
+  result := (mFontWdt[Byte(ch)] and $0f);
 end;
 
-procedure TScissorSave.restore ();
+
+function TGxBmpFont.drawCharInternal (x, y: Integer; const ch: AnsiChar): Integer;
 begin
-  glScissor(scxywh[0], scxywh[1], scxywh[2], scxywh[3]);
-  if wassc then glEnable(GL_SCISSOR_TEST) else glDisable(GL_SCISSOR_TEST);
+  initDrawText();
+  result := drawCharInterim(x, y, ch);
+  doneDrawText();
 end;
 
-procedure TScissorSave.combineRect (x, y, w, h: Integer);
-//var ox, oy, ow, oh: Integer;
+
+function TGxBmpFont.drawTextInternal (x, y: Integer; const s: AnsiString): Integer;
+var
+  ch: AnsiChar;
+  wdt: Integer;
 begin
-  if (w < 1) or (h < 1) then begin glScissor(0, 0, 0, 0); exit; end;
-  y := fuiScrHgt-(y+h);
-  //ox := x; oy := y; ow := w; oh := h;
-  if not intersectRect(x, y, w, h, scxywh[0], scxywh[1], scxywh[2], scxywh[3]) then
-  begin
-    //writeln('oops: COMBINE: old=(', ox, ',', oy, ')-(', ox+ow-1, ',', oy+oh-1, '); sci: (', scxywh[0], ',', scxywh[1], ')-(', scxywh[0]+scxywh[2]-1, ',', scxywh[1]+scxywh[3]-1, ')');
-    //writeln('oops: COMBINE: oldx=<', ox, '-', ox+ow-1, '>; oldy=<', oy, ',', oy+oh-1, '> : scix=<', scxywh[0], '-', scxywh[0]+scxywh[2]-1, '>; sciy=<', scxywh[1], '-', scxywh[1]+scxywh[3]-1, '>');
-    glScissor(0, 0, 0, 0);
-  end
-  else
+  if (Length(s) = 0) then begin result := 0; exit; end;
+  result := -1;
+  initDrawText();
+  for ch in s do
   begin
-    glScissor(x, y, w, h);
+    wdt := drawCharInterim(x, y, ch)+1;
+    x += wdt;
+    result += wdt;
   end;
+  doneDrawText();
 end;
 
 
 // ////////////////////////////////////////////////////////////////////////// //
-// returns `false` if the color is transparent
-function setupGLColor (r, g, b, a: Integer): Boolean;
+var
+  fontList: array of TGxBmpFont = nil;
+  defaultFontName: AnsiString = 'win14';
+
+
+function strEquCI (const s0, s1: AnsiString): Boolean;
+var
+  f: Integer;
+  c0, c1: AnsiChar;
 begin
-  normRGBA(r, g, b, a);
-  if (a < 255) then
+  result := (Length(s0) = Length(s1));
+  if (result) then
   begin
-    if (a = 0) then begin result := false; exit; end;
-    glEnable(GL_BLEND);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-  end
-  else
+    for f := 1 to Length(s0) do
+    begin
+      c0 := s0[f];
+      if (c0 >= 'a') and (c0 <= 'z') then Dec(c0, 32); // poor man's `toupper()`
+      c1 := s1[f];
+      if (c1 >= 'a') and (c1 <= 'z') then Dec(c1, 32); // poor man's `toupper()`
+      if (c0 <> c1) then begin result := false; exit; end;
+    end;
+  end;
+end;
+
+
+function getFontByName (const aname: AnsiString): TGxBmpFont;
+var
+  f: Integer;
+  fname: AnsiString;
+begin
+  if (Length(fontList) = 0) then raise Exception.Create('font subsystem not initialized');
+  if (Length(aname) = 0) or (strEquCI(aname, 'default')) then fname := defaultFontName else fname := aname;
+  for f := 0 to High(fontList) do
   begin
-    glDisable(GL_BLEND);
+    result := fontList[f];
+    if (result = nil) then continue;
+    if (strEquCI(result.name, fname)) then exit;
   end;
-  glColor4ub(Byte(r), Byte(g), Byte(b), Byte(a));
-  result := true;
+  if (fontList[0] = nil) then raise Exception.Create('font subsystem not properly initialized');
+  result := fontList[0];
 end;
 
-// returns `false` if the color is transparent
-function setupGLColor (constref clr: TGxRGBA): Boolean;
+
+{
+procedure deleteFonts ();
+var
+  f: Integer;
 begin
-  if (clr.a < 255) then
+  for f := 0 to High(fontList) do freeAndNil(fontList[f]);
+  fontList := nil;
+end;
+}
+
+
+procedure fuiGfxLoadFont (const fontname: AnsiString; const fontFile: AnsiString; proportional: Boolean=false);
+var
+  st: TStream;
+begin
+  if (Length(fontname) = 0) then raise Exception.Create('FlexUI: cannot load nameless font '''+fontFile+'''');
+  st := fuiOpenFile(fontFile);
+  if (st = nil) then raise Exception.Create('FlexUI: cannot load font '''+fontFile+'''');
+  try
+    fuiGfxLoadFont(fontname, st, proportional);
+  except on e: Exception do
+    begin
+      writeln('FlexUI font loadin error: ', e.message);
+      FreeAndNil(st);
+      raise Exception.Create('FlexUI: cannot load font '''+fontFile+'''');
+    end;
+  else
+    raise;
+  end;
+  FreeAndNil(st);
+end;
+
+
+procedure fuiGfxLoadFont (const fontname: AnsiString; st: TStream; proportional: Boolean=false);
+var
+  fnt: TGxBmpFont = nil;
+  f: Integer;
+begin
+  if (Length(fontname) = 0) then raise Exception.Create('FlexUI: cannot load nameless font');
+  fnt := TGxBmpFont.Create(fontname, st, proportional);
+  try
+    for f := 0 to High(fontList) do
+    begin
+      if (strEquCI(fontList[f].name, fontname)) then
+      begin
+        if (fontList[f].mTexId <> 0) then raise Exception.Create('FlexUI: cannot reload generated font named '''+fontname+'''');
+        FreeAndNil(fontList[f]);
+        fontList[f] := fnt;
+        exit;
+      end;
+    end;
+    SetLength(fontList, Length(fontList)+1);
+    fontList[High(fontList)] := fnt;
+  except
+    FreeAndNil(fnt);
+    raise;
+  end;
+end;
+
+
+procedure oglInitFonts ();
+var
+  f: Integer;
+begin
+  for f := 0 to High(fontList) do if (fontList[f] <> nil) then fontList[f].oglCreateTexture();
+end;
+
+
+procedure oglDeinitFonts ();
+var
+  f: Integer;
+begin
+  for f := 0 to High(fontList) do if (fontList[f] <> nil) then fontList[f].oglDestroyTexture();
+end;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+procedure oglSetup2DState ();
+begin
+  glDisable(GL_BLEND);
+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+  glDisable(GL_LINE_SMOOTH);
+  glDisable(GL_POLYGON_SMOOTH);
+  glDisable(GL_POINT_SMOOTH);
+  glDisable(GL_DEPTH_TEST);
+  glDisable(GL_TEXTURE_2D);
+  glDisable(GL_LIGHTING);
+  glDisable(GL_DITHER);
+  glDisable(GL_STENCIL_TEST);
+  glDisable(GL_SCISSOR_TEST);
+  glDisable(GL_CULL_FACE);
+  glDisable(GL_ALPHA_TEST);
+
+  glClearColor(0, 0, 0, 0);
+  glColor4f(1, 1, 1, 1);
+end;
+
+
+procedure oglSetup2D (winWidth, winHeight: Integer; upsideDown: Boolean=false);
+begin
+  glViewport(0, 0, winWidth, winHeight);
+
+  oglSetup2DState();
+
+  glMatrixMode(GL_TEXTURE);
+  glLoadIdentity();
+
+  glMatrixMode(GL_COLOR);
+  glLoadIdentity();
+
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  if (upsideDown) then
   begin
-    if (clr.a = 0) then begin result := false; exit; end;
-    glEnable(GL_BLEND);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    glOrtho(0, winWidth, 0, winHeight, -1, 1); // set origin to bottom left
   end
   else
   begin
-    glDisable(GL_BLEND);
+    glOrtho(0, winWidth, winHeight, 0, -1, 1); // set origin to top left
   end;
-  glColor4ub(clr.r, clr.g, clr.b, clr.a);
-  result := true;
+
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
+end;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+{$INCLUDE fui_gfx_gl_cursor.inc}
+
+procedure oglDrawCursor (); begin oglDrawCursorAt(fuiMouseX, fuiMouseY); end;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+constructor TGxContext.Create ();
+begin
+  mActive := false;
+  mColor := TGxRGBA.Create(255, 255, 255);
+  mFont := getFontByName('default');
+  mScaled := false;
+  mScale := 1.0;
+  mClipRect := TGxRect.Create(0, 0, 8192, 8192);
+  mClipOfs := TGxOfs.Create(0, 0);
+end;
+
+
+destructor TGxContext.Destroy ();
+begin
+  if (mActive) then gxSetContext(nil);
+  inherited;
+end;
+
+
+function TGxContext.getFont (): AnsiString;
+begin
+  result := mFont.name;
 end;
 
-function isScaled (): Boolean;
-var
-  mt: packed array [0..15] of Double;
+procedure TGxContext.setFont (const aname: AnsiString);
 begin
-  glGetDoublev(GL_MODELVIEW_MATRIX, @mt[0]);
-  result := (mt[0] <> 1.0) or (mt[1*4+1] <> 1.0);
+  mFont := getFontByName(aname);
 end;
 
 
-// ////////////////////////////////////////////////////////////////////////// //
-function textWidth6 (const s: AnsiString): Integer;
-var
-  f: Integer;
+procedure TGxContext.onActivate ();
 begin
-  result := 0;
-  for f := 1 to Length(s) do Inc(result, Integer(kgiFont6PropWidth[Integer(s[f])] and $0f)+1);
-  if (result > 0) then Dec(result); // don't count last empty pixel
+  setupGLColor(mColor);
+  realizeClip();
 end;
 
-
-function textWidth8 (const s: AnsiString): Integer;
-var
-  f: Integer;
+procedure TGxContext.onDeactivate ();
 begin
-  result := 0;
-  for f := 1 to Length(s) do Inc(result, Integer(kgiFont8PropWidth[Integer(s[f])] and $0f)+1);
-  if (result > 0) then Dec(result); // don't count last empty pixel
 end;
 
 
-// return width (including last empty pixel)
-function drawTextInternal (wdt, x, y: Integer; const s: AnsiString; constref clr: TGxRGBA; tid: GLuint; constref fontwdt: array of Byte; prop: Boolean): Integer;
-var
-  f, c: Integer;
-  tx, ty: Integer;
+procedure TGxContext.setColor (const clr: TGxRGBA);
 begin
-  result := 0;
-  if (Length(s) = 0) then exit;
-  if not setupGLColor(clr) then exit;
+  mColor := clr;
+  if (mActive) then setupGLColor(mColor);
+end;
 
-  glEnable(GL_ALPHA_TEST);
-  glAlphaFunc(GL_NOTEQUAL, 0.0);
-  glEnable(GL_TEXTURE_2D);
-  glBindTexture(GL_TEXTURE_2D, tid);
 
-  for f := 1 to Length(s) do
+procedure TGxContext.realizeClip ();
+var
+  sx, sy, sw, sh: Integer;
+begin
+  if (not mActive) then exit; // just in case
+  if (mClipRect.w <= 0) or (mClipRect.h <= 0) then
   begin
-    c := Integer(s[f]) and $ff;
-    tx := (c mod 16)*8;
-    ty := (c div 16)*8;
-    glBegin(GL_QUADS);
-      glTexCoord2f((tx+0)/128.0, (ty+0)/128.0); glVertex2i(x+0, y+0); // top-left
-      glTexCoord2f((tx+8)/128.0, (ty+0)/128.0); glVertex2i(x+8, y+0); // top-right
-      glTexCoord2f((tx+8)/128.0, (ty+8)/128.0); glVertex2i(x+8, y+8); // bottom-right
-      glTexCoord2f((tx+0)/128.0, (ty+8)/128.0); glVertex2i(x+0, y+8); // bottom-left
-    glEnd();
-    if prop then
+    glEnable(GL_SCISSOR_TEST);
+    glScissor(0, 0, 0, 0);
+  end
+  else
+  begin
+    if (mScaled) then
+    begin
+      sx := trunc(mClipRect.x*mScale);
+      sy := trunc(mClipRect.y*mScale);
+      sw := trunc(mClipRect.w*mScale);
+      sh := trunc(mClipRect.h*mScale);
+    end
+    else
+    begin
+      sx := mClipRect.x;
+      sy := mClipRect.y;
+      sw := mClipRect.w;
+      sh := mClipRect.h;
+    end;
+    if (not intersectRect(sx, sy, sw, sh, 0, 0, fuiScrWdt, fuiScrHgt)) then
+    begin
+      glEnable(GL_SCISSOR_TEST);
+      glScissor(0, 0, 0, 0);
+    end
+    else if (sx = 0) and (sy = 0) and (sw = fuiScrWdt) and (sh = fuiScrHgt) then
     begin
-      x += Integer(fontwdt[c] and $0f)+1;
-      result += Integer(fontwdt[c] and $0f)+1;
+      glDisable(GL_SCISSOR_TEST);
     end
     else
     begin
-      x += wdt;
-      result += wdt;
+      glEnable(GL_SCISSOR_TEST);
+      sy := fuiScrHgt-(sy+sh);
+      glScissor(sx, sy, sw, sh);
     end;
   end;
+end;
 
-  glDisable(GL_ALPHA_TEST);
-  glDisable(GL_BLEND);
-  glDisable(GL_TEXTURE_2D);
-  glColor4f(1, 1, 1, 1);
-  glBindTexture(GL_TEXTURE_2D, 0);
+
+procedure TGxContext.resetClip ();
+begin
+  mClipRect := TGxRect.Create(0, 0, 8192, 8192);
+  if (mActive) then realizeClip();
 end;
 
 
-// ////////////////////////////////////////////////////////////////////////// //
-procedure drawHLine (x, y, len: Integer; constref clr: TGxRGBA);
+procedure TGxContext.setClipOfs (const aofs: TGxOfs);
 begin
-  if (len < 1) then exit;
-  if not setupGLColor(clr) then exit;
-  glDisable(GL_TEXTURE_2D);
-  if (not isScaled) then
-  begin
-    glLineWidth(1);
-    glBegin(GL_LINES);
-      glVertex2f(x+0.375, y+0.375);
-      glVertex2f(x+len+0.375, y+0.375);
-    glEnd();
-  end
-  else
-  begin
-    glBegin(GL_QUADS);
-      glVertex2i(x, y);
-      glVertex2i(x+len, y);
-      glVertex2i(x+len, y+1);
-      glVertex2i(x, y+1);
-    glEnd();
-  end;
+  mClipOfs := aofs;
 end;
 
 
-procedure drawVLine (x, y, len: Integer; constref clr: TGxRGBA);
+procedure TGxContext.setClipRect (const aclip: TGxRect);
 begin
-  if (len < 1) then exit;
-  if not setupGLColor(clr) then exit;
-  glDisable(GL_TEXTURE_2D);
-  if (not isScaled) then
-  begin
-    glLineWidth(1);
-    glBegin(GL_LINES);
-      glVertex2f(x+0.375, y+0.375);
-      glVertex2f(x+0.375, y+len+0.375);
-    glEnd();
-  end
-  else
-  begin
-    glBegin(GL_QUADS);
-      glVertex2i(x, y);
-      glVertex2i(x, y+len);
-      glVertex2i(x+1, y+len);
-      glVertex2i(x+1, y);
-    glEnd();
-  end;
+  mClipRect := aclip;
+  if (mActive) then realizeClip();
 end;
 
 
-procedure drawLine (x1, y1, x2, y2: Integer; constref clr: TGxRGBA);
+function TGxContext.setOffset (constref aofs: TGxOfs): TGxOfs;
 begin
-  if not setupGLColor(clr) then exit;
+  result := mClipOfs;
+  mClipOfs := aofs;
+end;
 
-  glDisable(GL_TEXTURE_2D);
 
-  glLineWidth(1);
-  glPointSize(1);
+function TGxContext.setClip (constref aclip: TGxRect): TGxRect;
+begin
+  result := mClipRect;
+  mClipRect := aclip;
+  if (mActive) then realizeClip();
+end;
+
+
+function TGxContext.combineClip (constref aclip: TGxRect): TGxRect;
+begin
+  result := mClipRect;
+  mClipRect.intersect(aclip);
+  if (mActive) then realizeClip();
+end;
 
-  if (not isScaled) then
+
+procedure TGxContext.line (x1, y1, x2, y2: Integer);
+begin
+  if (not mActive) or (mClipRect.w < 1) or (mClipRect.h < 1) or (mColor.a = 0) then exit;
+
+  if (not mScaled) then
   begin
     glLineWidth(1);
     glBegin(GL_LINES);
@@ -800,6 +966,7 @@ begin
 
     if (x1 <> x2) or (y1 <> y2) then
     begin
+      glPointSize(1);
       glBegin(GL_POINTS);
         glVertex2f(x2+0.375, y2+0.375);
       glEnd();
@@ -816,84 +983,85 @@ begin
       glVertex2i(x2+1, y2+1);
     glEnd();
   end;
-
-  glColor4f(1, 1, 1, 1);
-  glDisable(GL_BLEND);
 end;
 
 
-procedure drawRect (x, y, w, h: Integer; constref clr: TGxRGBA);
+procedure TGxContext.hline (x, y, len: Integer);
 begin
-  if (w < 0) or (h < 0) then exit;
-  if not setupGLColor(clr) then exit;
-  glDisable(GL_TEXTURE_2D);
-  glLineWidth(1);
-  glDisable(GL_LINE_SMOOTH);
-  glDisable(GL_POLYGON_SMOOTH);
-  if (w = 1) and (h = 1) then
-  begin
-    glBegin(GL_POINTS);
-      glVertex2f(x+0.375, y+0.375);
-    glEnd();
-  end
-  else
+  if (not mActive) or (mClipRect.w < 1) or (mClipRect.h < 1) or (mColor.a = 0) then exit;
+  if (len < 1) then exit;
+  if (not mScaled) then
   begin
     glLineWidth(1);
     glBegin(GL_LINES);
-      glVertex2i(x, y); glVertex2i(x+w, y); // top
-      glVertex2i(x, y+h-1); glVertex2i(x+w, y+h-1); // bottom
-      glVertex2f(x+0.375, y+1); glVertex2f(x+0.375, y+h-1); // left
-      glVertex2f(x+w-1+0.375, y+1); glVertex2f(x+w-1+0.375, y+h-1); // right
+      glVertex2f(x+0.375, y+0.375);
+      glVertex2f(x+len+0.375, y+0.375);
     glEnd();
-  end;
-  //glRect(x, y, x+w, y+h);
-  glColor4f(1, 1, 1, 1);
-  glDisable(GL_BLEND);
-end;
-
-
-procedure drawRectUI (x, y, w, h: Integer; constref clr: TGxRGBA);
-  procedure hline (x, y, len: Integer);
+  end
+  else if (mScale > 1.0) then
   begin
-    if (len < 1) then exit;
     glBegin(GL_QUADS);
       glVertex2i(x, y);
       glVertex2i(x+len, y);
       glVertex2i(x+len, y+1);
       glVertex2i(x, y+1);
     glEnd();
+  end
+  else
+  begin
+    glPointSize(1);
+    glBegin(GL_POINTS);
+      while (len > 0) do begin glVertex2i(x, y); Inc(x); Dec(len); end;
+    glEnd();
   end;
+end;
 
-  procedure vline (x, y, len: Integer);
+
+procedure TGxContext.vline (x, y, len: Integer);
+begin
+  if (not mActive) or (mClipRect.w < 1) or (mClipRect.h < 1) or (mColor.a = 0) then exit;
+  if (len < 1) then exit;
+  if (not mScaled) then
+  begin
+    glLineWidth(1);
+    glBegin(GL_LINES);
+      glVertex2f(x+0.375, y+0.375);
+      glVertex2f(x+0.375, y+len+0.375);
+    glEnd();
+  end
+  else if (mScale > 1.0) then
   begin
-    if (len < 1) then exit;
     glBegin(GL_QUADS);
       glVertex2i(x, y);
       glVertex2i(x, y+len);
       glVertex2i(x+1, y+len);
       glVertex2i(x+1, y);
     glEnd();
+  end
+  else
+  begin
+    glPointSize(1);
+    glBegin(GL_POINTS);
+      while (len > 0) do begin glVertex2i(x, y); Inc(y); Dec(len); end;
+    glEnd();
   end;
+end;
 
-var
-  scaled: Boolean;
+
+procedure TGxContext.rect (x, y, w, h: Integer);
 begin
+  if (not mActive) or (mClipRect.w < 1) or (mClipRect.h < 1) or (mColor.a = 0) then exit;
   if (w < 0) or (h < 0) then exit;
-  if not setupGLColor(clr) then exit;
-  glDisable(GL_TEXTURE_2D);
-  glLineWidth(1);
-  glDisable(GL_LINE_SMOOTH);
-  glDisable(GL_POLYGON_SMOOTH);
-  scaled := isScaled();
   if (w = 1) and (h = 1) then
   begin
+    glPointSize(1);
     glBegin(GL_POINTS);
-      if scaled then glVertex2i(x, y) else glVertex2f(x+0.375, y+0.375);
+      if mScaled then glVertex2i(x, y) else glVertex2f(x+0.375, y+0.375);
     glEnd();
   end
   else
   begin
-    if not scaled then
+    if (not mScaled) then
     begin
       glLineWidth(1);
       glBegin(GL_LINES);
@@ -911,22 +1079,29 @@ begin
       vline(x+w-1, y+1, h-2);
     end;
   end;
-  //glRect(x, y, x+w, y+h);
-  glColor4f(1, 1, 1, 1);
-  glDisable(GL_BLEND);
 end;
 
 
-procedure darkenRect (x, y, w, h: Integer; a: Integer);
+procedure TGxContext.fillRect (x, y, w, h: Integer);
+begin
+  if (not mActive) or (mClipRect.w < 1) or (mClipRect.h < 1) or (mColor.a = 0) then exit;
+  if (w < 0) or (h < 0) then exit;
+  glBegin(GL_QUADS);
+    glVertex2f(x, y);
+    glVertex2f(x+w, y);
+    glVertex2f(x+w, y+h);
+    glVertex2f(x, y+h);
+  glEnd();
+end;
+
+
+procedure TGxContext.darkenRect (x, y, w, h: Integer; a: Integer);
 begin
+  if (not mActive) or (mClipRect.w < 1) or (mClipRect.h < 1) or (a >= 255) then exit;
   if (w < 0) or (h < 0) then exit;
   if (a < 0) then a := 0;
-  if (a >= 255) then exit;
   glEnable(GL_BLEND);
   glBlendFunc(GL_ZERO, GL_SRC_ALPHA);
-  glDisable(GL_LINE_SMOOTH);
-  glDisable(GL_POLYGON_SMOOTH);
-  glDisable(GL_TEXTURE_2D);
   glColor4f(0.0, 0.0, 0.0, a/255.0);
   glBegin(GL_QUADS);
     glVertex2i(x, y);
@@ -934,93 +1109,274 @@ begin
     glVertex2i(x+w, y+h);
     glVertex2i(x, y+h);
   glEnd();
-  //glRect(x, y, x+w, y+h);
-  glColor4f(1, 1, 1, 1);
-  glDisable(GL_BLEND);
-  //glBlendEquation(GL_FUNC_ADD);
+  setupGLColor(mColor);
 end;
 
 
-procedure fillRect (x, y, w, h: Integer; constref clr: TGxRGBA);
+function TGxContext.charWidth (const ch: AnsiChar): Integer;
 begin
-  if (w < 0) or (h < 0) then exit;
-  if not setupGLColor(clr) then exit;
-  glDisable(GL_LINE_SMOOTH);
-  glDisable(GL_POLYGON_SMOOTH);
-  glDisable(GL_TEXTURE_2D);
-  glBegin(GL_QUADS);
-    glVertex2f(x, y);
-    glVertex2f(x+w, y);
-    glVertex2f(x+w, y+h);
-    glVertex2f(x, y+h);
-  glEnd();
-  glColor4f(1, 1, 1, 1);
-  glDisable(GL_BLEND);
+  result := mFont.charWidth(ch);
+end;
+
+function TGxContext.charHeight (const ch: AnsiChar): Integer;
+begin
+  result := mFont.height;
 end;
 
 
-// ////////////////////////////////////////////////////////////////////////// //
-function drawText6 (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
+function TGxContext.textWidth (const s: AnsiString): Integer;
 begin
-  if (font6texid = 0) then createFonts();
-  drawTextInternal(6, x, y, s, clr, font6texid, kgiFont6PropWidth, false);
-  result := Length(s)*6;
+  result := mFont.textWidth(s);
 end;
 
-function drawText8 (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
+function TGxContext.textHeight (const s: AnsiString): Integer;
 begin
-  if (font8texid = 0) then createFonts();
-  drawTextInternal(8, x, y, s, clr, font8texid, kgiFont8PropWidth, false);
-  result := Length(s)*8;
+  result := mFont.height;
 end;
 
-function drawText6Prop (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
+
+function TGxContext.drawChar (x, y: Integer; const ch: AnsiChar): Integer; // returns char width
 begin
-  if (prfont6texid = 0) then createFonts();
-  result := drawTextInternal(6, x, y, s, clr, prfont6texid, kgiFont6PropWidth, true);
+  result := mFont.charWidth(ch);
+  if (not mActive) or (mClipRect.w < 1) or (mClipRect.h < 1) or (mColor.a = 0) then exit;
+  TGxBmpFont(mFont).drawCharInternal(x, y, ch);
 end;
 
-function drawText8Prop (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
+function TGxContext.drawText (x, y: Integer; const s: AnsiString): Integer; // returns text width
 begin
-  if (prfont8texid = 0) then createFonts();
-  result := drawTextInternal(8, x, y, s, clr, prfont8texid, kgiFont8PropWidth, true);
+  result := mFont.textWidth(s);
+  if (not mActive) or (mClipRect.w < 1) or (mClipRect.h < 1) or (mColor.a = 0) or (Length(s) = 0) then exit;
+  TGxBmpFont(mFont).drawTextInternal(x, y, s);
 end;
 
 
-// ////////////////////////////////////////////////////////////////////////// //
-// x-centered at `x`
-function drawText6XC (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
+function TGxContext.iconMarkWidth (ic: TMarkIcon): Integer;
+begin
+  {$IFDEF FUI_TEXT_ICONS}
+  case ic of
+    TMarkIcon.Checkbox: result := textWidth('[x]');
+    TMarkIcon.Radiobox: result := textWidth('(*)');
+    else result := textWidth('[x]');
+  end;
+  {$ELSE}
+  result := 11;
+  {$ENDIF}
+end;
+
+function TGxContext.iconMarkHeight (ic: TMarkIcon): Integer;
+begin
+  {$IFDEF FUI_TEXT_ICONS}
+  case ic of
+    TMarkIcon.Checkbox: result := textHeight('[x]');
+    TMarkIcon.Radiobox: result := textHeight('(*)');
+    else result := textHeight('[x]');
+  end;
+  {$ELSE}
+  result := 8;
+  {$ENDIF}
+end;
+
+procedure TGxContext.drawIconMark (ic: TMarkIcon; x, y: Integer; marked: Boolean);
+var
+  {$IFDEF FUI_TEXT_ICONS}
+  xstr: AnsiString;
+  {$ELSE}
+  f: Integer;
+  {$ENDIF}
+begin
+  if (not mActive) or (mClipRect.w < 1) or (mClipRect.h < 1) or (mColor.a = 0) then exit;
+  {$IFDEF FUI_TEXT_ICONS}
+  case ic of
+    TMarkIcon.Checkbox: xstr := '[x]';
+    TMarkIcon.Radiobox: xstr := '(*)';
+    else exit;
+  end;
+  if (marked) then
+  begin
+    drawText(x, y, xstr);
+  end
+  else
+  begin
+    drawChar(x, y, xstr[1]);
+    drawChar(x+textWidth(xstr)-charWidth(xstr[3]), y, xstr[3]);
+  end;
+  {$ELSE}
+  if (ic = TMarkIcon.Checkbox) then
+  begin
+    vline(x, y, 7);
+    vline(x+10, y, 7);
+    hline(x+1, y, 1);
+    hline(x+1, y+6, 1);
+    hline(x+9, y, 1);
+    hline(x+9, y+6, 1);
+  end
+  else
+  begin
+    vline(x, y+1, 5);
+    vline(x+10, y+1, 5);
+    hline(x+1, y, 1);
+    hline(x+1, y+6, 1);
+    hline(x+9, y, 1);
+    hline(x+9, y+6, 1);
+  end;
+  if (not marked) then exit;
+  case ic of
+    TMarkIcon.Checkbox:
+      begin
+        for f := 0 to 4 do
+        begin
+          vline(x+3+f, y+1+f, 1);
+          vline(x+7-f, y+1+f, 1);
+        end;
+      end;
+    TMarkIcon.Radiobox:
+      begin
+        hline(x+4, y+1, 3);
+        hline(x+3, y+2, 5);
+        hline(x+3, y+3, 5);
+        hline(x+3, y+4, 5);
+        hline(x+4, y+5, 3);
+      end;
+  end;
+  {$ENDIF}
+end;
+
+
+function TGxContext.iconWinWidth (ic: TWinIcon): Integer;
+begin
+  {$IFDEF FUI_TEXT_ICONS}
+  case ic of
+    TWinIcon.Close: result := nmax(textWidth('[x]'), textWidth('[#]'));
+    else result := nmax(textWidth('[x]'), textWidth('[#]'));
+  end;
+  {$ELSE}
+  result := 9;
+  {$ENDIF}
+end;
+
+function TGxContext.iconWinHeight (ic: TWinIcon): Integer;
+begin
+  {$IFDEF FUI_TEXT_ICONS}
+  case ic of
+    TWinIcon.Close: result := nmax(textHeight('[x]'), textHeight('[#]'));
+    else result := nmax(textHeight('[x]'), textHeight('[#]'));
+  end;
+  {$ELSE}
+  result := 8;
+  {$ENDIF}
+end;
+
+procedure TGxContext.drawIconWin (ic: TWinIcon; x, y: Integer; pressed: Boolean);
+var
+  {$IFDEF FUI_TEXT_ICONS}
+  xstr: AnsiString;
+  wdt: Integer;
+  {$ELSE}
+  f: Integer;
+  {$ENDIF}
+begin
+  if (not mActive) or (mClipRect.w < 1) or (mClipRect.h < 1) or (mColor.a = 0) then exit;
+  {$IFDEF FUI_TEXT_ICONS}
+  case ic of
+    TWinIcon.Close: if (pressed) then xstr := '[#]' else xstr := '[x]';
+    else exit;
+  end;
+  wdt := nmax(textWidth('[x]'), textWidth('[#]'));
+  drawChar(x, y, xstr[1]);
+  drawChar(x+wdt-charWidth(xstr[3]), y, xstr[3]);
+  drawChar(x+((wdt-charWidth(xstr[2])) div 2), y, xstr[2]);
+  {$ELSE}
+  if pressed then rect(x, y, 9, 8);
+  for f := 1 to 5 do
+  begin
+    vline(x+1+f, y+f, 1);
+    vline(x+1+6-f, y+f, 1);
+  end;
+  {$ENDIF}
+end;
+
+
+procedure TGxContext.glSetScale (ascale: Single);
+begin
+  if (ascale < 0.01) then ascale := 0.01;
+  glLoadIdentity();
+  glScalef(ascale, ascale, 1.0);
+  mScale := ascale;
+  mScaled := (ascale <> 1.0);
+end;
+
+procedure TGxContext.glSetTrans (ax, ay: Single);
+begin
+  glLoadIdentity();
+  glScalef(mScale, mScale, 1.0);
+  glTranslatef(ax, ay, 0);
+end;
+
+
+procedure TGxContext.glSetScaleTrans (ascale, ax, ay: Single);
+begin
+  glSetScale(ascale);
+  glTranslatef(ax, ay, 0);
+end;
+
+
+// vertical scroll bar
+procedure TGxContext.drawVSBar (x, y, wdt, hgt: Integer; cur, min, max: Integer; constref clrfull, clrempty: TGxRGBA);
+var
+  filled: Integer;
 begin
-  if (font6texid = 0) then createFonts();
-  x -= Length(s)*6 div 2;
-  drawTextInternal(6, x, y, s, clr, font6texid, kgiFont6PropWidth, false);
-  result := Length(s)*6;
+  if (wdt < 1) or (hgt < 1) then exit;
+  filled := sbarFilled(hgt, cur, min, max);
+  color := clrfull;
+  fillRect(x, y, wdt, filled);
+  color := clrempty;
+  fillRect(x, y+filled, wdt, hgt-filled);
 end;
 
-function drawText8XC (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
+
+// horizontal scrollbar
+procedure TGxContext.drawHSBar (x, y, wdt, hgt: Integer; cur, min, max: Integer; constref clrfull, clrempty: TGxRGBA);
+var
+  filled: Integer;
 begin
-  if (font8texid = 0) then createFonts();
-  x -= Length(s)*8 div 2;
-  drawTextInternal(8, x, y, s, clr, font8texid, kgiFont8PropWidth, false);
-  result := Length(s)*8;
+  if (wdt < 1) or (hgt < 1) then exit;
+  filled := sbarFilled(wdt, cur, min, max);
+  color := clrfull;
+  fillRect(x, y, filled, hgt);
+  color := clrempty;
+  fillRect(x+filled, y, wdt-filled, hgt);
 end;
 
-function drawText6PropXC (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
+
+class function TGxContext.sbarFilled (wh: Integer; cur, min, max: Integer): Integer;
 begin
-  if (prfont6texid = 0) then createFonts();
-  x -= textWidth6(s) div 2;
-  result := drawTextInternal(6, x, y, s, clr, prfont6texid, kgiFont6PropWidth, true);
+       if (wh < 1) then result := 0
+  else if (min > max) then result := 0
+  else if (min = max) then result := wh
+  else
+  begin
+    if (cur < min) then cur := min else if (cur > max) then cur := max;
+    result := wh*(cur-min) div (max-min);
+  end;
 end;
 
-function drawText8PropXC (x, y: Integer; const s: AnsiString; constref clr: TGxRGBA): Integer;
+
+class function TGxContext.sbarPos (cxy: Integer; xy, wh: Integer; min, max: Integer): Integer;
 begin
-  if (prfont8texid = 0) then createFonts();
-  x -= textWidth8(s) div 2;
-  result := drawTextInternal(8, x, y, s, clr, prfont8texid, kgiFont8PropWidth, true);
+  if (wh < 1) then begin result := 0; exit; end;
+  if (min > max) then begin result := 0; exit; end;
+  if (min = max) then begin result := max; exit; end;
+  if (cxy < xy) then begin result := min; exit; end;
+  if (cxy >= xy+wh) then begin result := max; exit; end;
+  result := min+((max-min)*(cxy-xy) div wh);
+  assert((result >= min) and (result <= max));
 end;
 
 
+
+
 // ////////////////////////////////////////////////////////////////////////// //
+(*
 procedure oglRestoreMode (doClear: Boolean);
 begin
   oglSetup2D(fuiScrWdt, fuiScrHgt);
@@ -1051,21 +1407,20 @@ begin
   glLoadIdentity();
   //glScalef(4, 4, 1);
 end;
+*)
 
 
-//procedure onWinFocus (); begin end;
-//procedure onWinBlur (); begin fuiResetKMState(true); end;
+//procedure onWinFocus (); begin uiFocus(); end;
+//procedure onWinBlur (); begin fuiResetKMState(true); uiBlur(); end;
 
-procedure onPreRender (); begin oglRestoreMode(gGfxDoClear); end;
-
-procedure onPostRender (); begin oglRestoreMode(false); oglDrawCursor(); end;
+//procedure onPreRender (); begin oglRestoreMode(gGfxDoClear); end;
+procedure onPostRender (); begin oglDrawCursor(); end;
 
 procedure onInit ();
 begin
-  oglSetup2D(fuiScrWdt, fuiScrHgt);
-
+  //oglSetup2D(fuiScrWdt, fuiScrHgt);
   createCursorTexture();
-  createFonts();
+  oglInitFonts();
 end;
 
 procedure onDeinit ();
@@ -1073,7 +1428,7 @@ begin
   fuiResetKMState(false);
   if (curtexid <> 0) then glDeleteTextures(1, @curtexid);
   curtexid := 0;
-  deleteFonts();
+  oglDeinitFonts();
   fuiSetButState(0);
   fuiSetModState(0);
   fuiSetMouseX(0);
@@ -1082,10 +1437,12 @@ end;
 
 
 // ////////////////////////////////////////////////////////////////////////// //
-begin
+initialization
+  savedGLState := TSavedGLState.Create(false);
+  //createFonts();
   //winFocusCB := onWinFocus;
   //winBlurCB := onWinBlur;
-  prerenderFrameCB := onPreRender;
+  //prerenderFrameCB := onPreRender;
   postrenderFrameCB := onPostRender;
   oglInitCB := onInit;
   oglDeinitCB := onDeinit;