freetype stuff for testing

git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@1449 b956fd51-792f-4845-bead-9b4dfca2ff2c

6 files changed, 4069 insertions, 0 deletions

diff --git a/src/lib/freetype/demo/Kopie von UFreeType.pas b/src/lib/freetype/demo/Kopie von UFreeType.pas
new file mode 100644
index 00000000..c1243aae
--- /dev/null
+++ b/src/lib/freetype/demo/Kopie von UFreeType.pas
@@ -0,0 +1,326 @@
+unit UFreeType;
+
+{$IFDEF FPC}
+  {$mode delphi}{$H+}
+{$ENDIF}
+
+interface
+
+uses
+  FreeType,
+  gl,
+  glu,
+  classes,
+  sysutils;
+
+type
+  // This holds all of the information related to any
+  // freetype font that we want to create.
+  TFontData = class
+    h: single;                  ///< Holds the height of the font.
+    textures: array of GLuint;  ///< Holds the texture id's
+    list_base: GLuint;          ///< Holds the first display list id
+
+    // The init function will create a font of
+    // of the height h from the file fname.
+    constructor Create(const fname: string; h: cardinal);
+
+    // Free all the resources assosiated with the font.
+    destructor Destroy(); override;
+  end;
+
+  TFreeType = class
+    public
+      // The flagship function of the library - this thing will print
+      // out text at window coordinates x,y, using the font ft_font.
+      // The current modelview matrix will also be applied to the text.
+      class procedure print(ft_font: TFontData; x, y: single; const str: string);
+  end;
+
+
+implementation
+
+
+// This function gets the first power of 2 >= the
+// int that we pass it.
+function next_p2 ( a: integer ): integer; inline;
+begin
+  Result := 1;
+  while (Result < a) do
+    Result := Result shl 1;
+end;
+
+type
+  PAGLuint = ^AGLuint;
+  AGLuint = array[0..High(Word)] of GLuint;
+
+// Create a display list coresponding to the given character.
+procedure make_dlist ( face: FT_Face; ch: byte; list_base: GLuint; tex_base: PAGLuint );
+var
+  i, j: integer;
+  width, height: integer;
+  glyph: FT_Glyph;
+  bitmap_glyph: FT_BitmapGlyph;
+  bitmap: PFT_Bitmap;
+  expanded_data: array of GLubyte;
+  x, y: single;
+begin
+  // The first thing we do is get FreeType to render our character
+  // into a bitmap.  This actually requires a couple of FreeType commands:
+
+  // Load the Glyph for our character.
+  if (FT_Load_Glyph( face, FT_Get_Char_Index( face, ch ), FT_LOAD_DEFAULT ) <> 0) then
+    raise Exception.create('FT_Load_Glyph failed');
+
+  // Move the face's glyph into a Glyph object.
+  if (FT_Get_Glyph( face^.glyph, glyph ) <> 0) then
+    raise Exception.create('FT_Get_Glyph failed');
+
+  // Convert the glyph to a bitmap.
+  FT_Glyph_To_Bitmap( glyph, ft_render_mode_normal, nil, 1 );
+  bitmap_glyph := FT_BitmapGlyph(glyph);
+
+  // This reference will make accessing the bitmap easier
+  bitmap := @bitmap_glyph^.bitmap;
+
+  // Use our helper function to get the widths of
+  // the bitmap data that we will need in order to create
+  // our texture.
+  width := next_p2( bitmap.width );
+  height := next_p2( bitmap.rows );
+
+  // Allocate memory for the texture data.
+  SetLength(expanded_data, 2 * width * height);
+
+  // Here we fill in the data for the expanded bitmap.
+  // Notice that we are using two channel bitmap (one for
+  // luminocity and one for alpha), but we assign
+  // both luminocity and alpha to the value that we
+  // find in the FreeType bitmap.
+  // We use the ?: operator so that value which we use
+  // will be 0 if we are in the padding zone, and whatever
+  // is the the Freetype bitmap otherwise.
+  for j := 0 to height-1 do
+  begin
+    for i := 0 to width-1 do
+    begin
+      if ((i >= bitmap.width) or (j >= bitmap.rows)) then
+        expanded_data[2*(i+j*width)] := 0
+      else
+        expanded_data[2*(i+j*width)] := byte(bitmap.buffer[i + bitmap.width*j]);
+      expanded_data[2*(i+j*width)+1] := expanded_data[2*(i+j*width)];
+    end;
+  end;
+
+
+  // Now we just setup some texture paramaters.
+  glBindTexture( GL_TEXTURE_2D, tex_base[integer(ch)]);
+  glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+  glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
+
+  // Here we actually create the texture itself, notice
+  // that we are using GL_LUMINANCE_ALPHA to indicate that
+  // we are using 2 channel data.
+  glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, width, height,
+      0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, @expanded_data[0] );
+
+  //With the texture created, we don't need to expanded data anymore
+  SetLength(expanded_data, 0);
+
+  //So now we can create the display list
+  glNewList(list_base+ch, GL_COMPILE);
+
+  glBindTexture(GL_TEXTURE_2D, tex_base[ch]);
+
+  glPushMatrix();
+
+  //first we need to move over a little so that
+  //the character has the right amount of space
+  //between it and the one before it.
+  glTranslatef(bitmap_glyph^.left, 0, 0);
+
+  //Now we move down a little in the case that the
+  //bitmap extends past the bottom of the line
+  //(this is only true for characters like 'g' or 'y'.
+  glTranslatef(0, bitmap_glyph^.top - bitmap.rows, 0);
+
+  //Now we need to account for the fact that many of
+  //our textures are filled with empty padding space.
+  //We figure what portion of the texture is used by 
+  //the actual character and store that information in
+  //the x and y variables, then when we draw the
+  //quad, we will only reference the parts of the texture
+  //that we contain the character itself.
+  x := bitmap.width / width;
+  y := bitmap.rows  / height;
+
+  //Here we draw the texturemaped quads.
+  //The bitmap that we got from FreeType was not
+  //oriented quite like we would like it to be,
+  //so we need to link the texture to the quad
+  //so that the result will be properly aligned.
+  glBegin(GL_QUADS);
+    glTexCoord2d(0, 0); glVertex2f(0, bitmap.rows);
+    glTexCoord2d(0, y); glVertex2f(0, 0);
+    glTexCoord2d(x, y); glVertex2f(bitmap.width, 0);
+    glTexCoord2d(x, 0); glVertex2f(bitmap.width, bitmap.rows);
+  glEnd();
+
+  glPopMatrix();
+  glTranslatef(face^.glyph^.advance.x shr 6, 0, 0);
+
+  //increment the raster position as if we were a bitmap font.
+  //(only needed if you want to calculate text length)
+  //glBitmap(0,0,0,0,face->glyph->advance.x >> 6,0,NULL);
+
+  //Finnish the display list
+  glEndList();
+end;
+
+
+constructor TFontData.Create(const fname: string; h: cardinal);
+var
+  library_: FT_Library;
+  //The object in which Freetype holds information on a given
+  //font is called a "face".
+  face: FT_Face;
+  i: byte;
+begin
+  //Allocate some memory to store the texture ids.
+  SetLength(textures, 128);
+
+  Self.h := h;
+
+  //Create and initilize a freetype font library.
+  if (FT_Init_FreeType( library_ ) <> 0) then
+    raise Exception.create('FT_Init_FreeType failed');
+
+  //This is where we load in the font information from the file.
+  //Of all the places where the code might die, this is the most likely,
+  //as FT_New_Face will die if the font file does not exist or is somehow broken.
+  if (FT_New_Face( library_, PChar(fname), 0, face ) <> 0) then
+    raise Exception.create('FT_New_Face failed (there is probably a problem with your font file)');
+
+  //For some twisted reason, Freetype measures font size
+  //in terms of 1/64ths of pixels.  Thus, to make a font
+  //h pixels high, we need to request a size of h*64.
+  //(h shl 6 is just a prettier way of writting h*64)
+  FT_Set_Char_Size( face, h shl 6, h shl 6, 96, 96);
+
+  //Here we ask opengl to allocate resources for
+  //all the textures and displays lists which we
+  //are about to create.  
+  list_base := glGenLists(128);
+  glGenTextures( 128, @textures[0] );
+
+  //This is where we actually create each of the fonts display lists.
+  for i := 0 to 127 do
+    make_dlist(face, i, list_base, @textures[0]);
+
+  //We don't need the face information now that the display
+  //lists have been created, so we free the assosiated resources.
+  FT_Done_Face(face);
+
+  //Ditto for the library.
+  FT_Done_FreeType(library_);
+end;
+
+destructor TFontData.Destroy();
+begin
+  glDeleteLists(list_base, 128);
+  glDeleteTextures(128, @textures[0]);
+  SetLength(textures, 0);
+end;
+
+/// A fairly straight forward function that pushes
+/// a projection matrix that will make object world
+/// coordinates identical to window coordinates.
+procedure pushScreenCoordinateMatrix(); inline;
+var
+  viewport: array [0..3] of GLint;
+begin
+  glPushAttrib(GL_TRANSFORM_BIT);
+  glGetIntegerv(GL_VIEWPORT, @viewport);
+  glMatrixMode(GL_PROJECTION);
+  glPushMatrix();
+  glLoadIdentity();
+  gluOrtho2D(viewport[0], viewport[2], viewport[1], viewport[3]);
+  glPopAttrib();
+end;
+
+/// Pops the projection matrix without changing the current
+/// MatrixMode.
+procedure pop_projection_matrix(); inline;
+begin
+  glPushAttrib(GL_TRANSFORM_BIT);
+  glMatrixMode(GL_PROJECTION);
+  glPopMatrix();
+  glPopAttrib();
+end;
+
+///Much like Nehe's glPrint function, but modified to work
+///with freetype fonts.
+class procedure TFreeType.print(ft_font: TFontData; x, y: single; const str: string);
+var
+  font: GLuint;
+  h: single;
+  i: cardinal;
+  lines: TStringList;
+  modelview_matrix: array[0..15] of single;
+begin
+  // We want a coordinate system where things coresponding to window pixels.
+  pushScreenCoordinateMatrix();
+
+  font := ft_font.list_base;
+  h := ft_font.h / 0.63;      //We make the height about 1.5* that of
+
+  lines := TStringList.Create();
+  ExtractStrings([#13], [], PChar(str), lines);
+
+  glPushAttrib(GL_LIST_BIT or GL_CURRENT_BIT  or GL_ENABLE_BIT or GL_TRANSFORM_BIT);
+  glMatrixMode(GL_MODELVIEW);
+  glDisable(GL_LIGHTING);
+  glEnable(GL_TEXTURE_2D);
+  glDisable(GL_DEPTH_TEST);
+  glEnable(GL_BLEND);
+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+  glListBase(font);
+
+  glGetFloatv(GL_MODELVIEW_MATRIX, @modelview_matrix);
+
+  //This is where the text display actually happens.
+  //For each line of text we reset the modelview matrix
+  //so that the line's text will start in the correct position.
+  //Notice that we need to reset the matrix, rather than just translating
+  //down by h. This is because when each character is
+  //draw it modifies the current matrix so that the next character
+  //will be drawn immediatly after it.
+  for i := 0 to lines.Count-1 do
+  begin
+    glPushMatrix();
+    glLoadIdentity();
+    glTranslatef(x, y - h*i, 0);
+    glMultMatrixf(@modelview_matrix);
+
+    //  The commented out raster position stuff can be useful if you need to
+    //  know the length of the text that you are creating.
+    //  If you decide to use it make sure to also uncomment the glBitmap command
+    //  in make_dlist().
+    //glRasterPos2f(0,0);
+    glCallLists(Length(lines[i]), GL_UNSIGNED_BYTE, PChar(lines[i]));
+    //float rpos[4];
+    //glGetFloatv(GL_CURRENT_RASTER_POSITION ,rpos);
+    //float len=x-rpos[0];
+
+    glPopMatrix();
+  end;
+
+  glPopAttrib();
+
+  pop_projection_matrix();
+ 
+  lines.Free();
+end;
+
+end.
diff --git a/src/lib/freetype/demo/Kopie von lesson43.dpr b/src/lib/freetype/demo/Kopie von lesson43.dpr
new file mode 100644
index 00000000..b49423fb
--- /dev/null
+++ b/src/lib/freetype/demo/Kopie von lesson43.dpr
@@ -0,0 +1,289 @@
+program lesson43;
+(*
+ * This code was created by Jeff Molofee '99
+ * (ported to Linux/SDL by Ti Leggett '01)
+ *
+ * If you've found this code useful, please let me know.
+ *
+ * Visit Jeff at http://nehe.gamedev.net/
+ *
+ * or for port-specific comments, questions, bugreports etc.
+ * email to leggett@eecs.tulane.edu
+ *)
+
+{$IFDEF FPC}
+  {$mode delphi}{$H+}
+{$ENDIF}
+
+{$APPTYPE Console}
+
+uses
+  moduleloader in '../../JEDI-SDL/SDL/Pas/moduleloader.pas',
+  SDL          in '../../JEDI-SDL/SDL/Pas/sdl.pas',
+  gl           in '../../JEDI-SDL/OpenGL/Pas/gl.pas',
+  glu          in '../../JEDI-SDL/OpenGL/Pas/glu.pas',
+  ctypes       in '../../ctypes/ctypes.pas',
+  FreeType     in '../freetype.pas',
+  UFreeType    in 'UFreeType.pas',
+  math,
+  sysutils;
+
+const
+  // screen width, height, and bit depth
+  SCREEN_WIDTH  = 640;
+  SCREEN_HEIGHT = 480;
+  SCREEN_BPP    =  16;
+
+var
+  our_font: TFontData;
+  // This is our SDL surface
+  surface: PSDL_Surface;
+  cnt1, cnt2: GLfloat;
+
+(* function to release/destroy our resources and restoring the old desktop *)
+procedure Quit(returnCode: integer);
+begin
+  // clean up the window
+  SDL_Quit( );
+
+  // and exit appropriately
+  Halt( returnCode );
+end;
+
+(* function to reset our viewport after a window resize *)
+function resizeWindow(width: integer; height: integer): boolean;
+var
+  // Height / width ration
+  ratio: GLfloat;
+begin
+  // Protect against a divide by zero
+  if ( height = 0 ) then
+    height := 1;
+
+  ratio := width / height;
+
+  // Setup our viewport.
+  glViewport( 0, 0, GLsizei(width), GLsizei(height) );
+
+  // change to the projection matrix and set our viewing volume.
+  glMatrixMode( GL_PROJECTION );
+  glLoadIdentity( );
+
+  // Set our perspective
+  gluPerspective( 45.0, ratio, 0.1, 100.0 );
+
+  // Make sure we're chaning the model view and not the projection
+  glMatrixMode( GL_MODELVIEW );
+
+  // Reset The View
+  glLoadIdentity( );
+
+  Result := true;
+end;
+
+(* function to handle key press events *)
+procedure handleKeyPress(keysym: PSDL_keysym);
+begin
+  case ( keysym^.sym ) of
+    SDLK_ESCAPE:
+    begin
+      // ESC key was pressed
+      Quit( 0 );
+    end;
+    SDLK_F1:
+    begin
+      // F1 key was pressed
+      // this toggles fullscreen mode
+      SDL_WM_ToggleFullScreen( surface );
+    end;
+  end;
+end;
+
+(* general OpenGL initialization function *)
+function initGL(): boolean;
+begin
+  // Enable smooth shading
+  glShadeModel( GL_SMOOTH );
+
+  // Set the background black
+  glClearColor( 0.0, 0.0, 0.0, 0.0 );
+
+  // Depth buffer setup
+  glClearDepth( 1.0 );
+
+  // Enables Depth Testing
+  glEnable( GL_DEPTH_TEST );
+
+  // The Type Of Depth Test To Do
+  glDepthFunc( GL_LEQUAL );
+
+  // Really Nice Perspective Calculations
+  glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
+
+  our_font := TFontData.Create('Test.ttf', 16);
+
+  Result := true;
+end;
+
+(* Here goes our drawing code *)
+function drawGLScene(): boolean;
+begin
+  glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);  // Clear Screen And Depth Buffer
+  glLoadIdentity();              // Reset The Current Modelview Matrix
+  glTranslatef(0.0, 0.0, -1.0);  // Move One Unit Into The Screen
+
+  // Blue Text
+  glColor3ub(0, 0, $ff);
+
+  // Position The WGL Text On The Screen
+  glRasterPos2f(-0.40, 0.35);
+
+  // Here We Print Some Text Using Our FreeType Font
+  // The only really important command is the actual print() call,
+  // but for the sake of making the results a bit more interesting
+  // I have put in some code to rotate and scale the text.
+
+  // Red text
+  glColor3ub($ff, 0, 0);
+
+  glPushMatrix();
+  glLoadIdentity();
+  glRotatef(cnt1, 0, 0,1);
+  glScalef(1, 0.8 + 0.3*cos(cnt1/5) ,1);
+  glTranslatef(-180, 0, 0);
+  TFreeType.print(our_font, 320, 240, 'Active FreeType Text - ' + FloatToStr(cnt1));
+  glPopMatrix();
+
+  //Uncomment this to test out print's ability to handle newlines.
+  //TFreeType.print(our_font, 320, 200, 'Here'#13'there'#13'be'#13#13'newlines'#13'.');
+
+  cnt1 := cnt1 + 0.051;  // Increase The First Counter
+  cnt2 := cnt2 + 0.005;  // Increase The First Counter
+
+  SDL_GL_SwapBuffers( );
+
+  Result := true;
+end;
+
+var
+  // Flags to pass to SDL_SetVideoMode
+  videoFlags: integer;
+  // main loop variable
+  done: boolean = false;
+  // used to collect events
+  event: TSDL_Event;
+  // this holds some info about our display
+  videoInfo: PSDL_VideoInfo;
+  // whether or not the window is active
+  isActive: boolean = true;
+
+begin
+  // initialize SDL
+  if ( SDL_Init( SDL_INIT_VIDEO ) < 0 ) then
+  begin
+    writeln( ErrOutput, 'Video initialization failed: ' + SDL_GetError() );
+    Quit( 1 );
+  end;
+
+  // Fetch the video info
+  videoInfo := SDL_GetVideoInfo( );
+
+  if ( videoInfo = nil ) then
+  begin
+    writeln( ErrOutput, 'Video query failed: ' + SDL_GetError() );
+    Quit( 1 );
+  end;
+
+  SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); // Enable double buffering
+
+  // the flags to pass to SDL_SetVideoMode
+  videoFlags := SDL_OPENGL;                        // Enable OpenGL in SDL
+  videoFlags := videoFlags or SDL_HWPALETTE;       // Store the palette in hardware
+  videoFlags := videoFlags or SDL_RESIZABLE;       // Enable window resizing
+
+  // This checks to see if surfaces can be stored in memory
+  if ( videoInfo^.hw_available <> 0 ) then
+    videoFlags := videoFlags or SDL_HWSURFACE
+  else
+    videoFlags := videoFlags or SDL_SWSURFACE;
+
+  // This checks if hardware blits can be done
+  if ( videoInfo^.blit_hw <> 0 ) then
+    videoFlags := videoFlags or SDL_HWACCEL;
+
+  // Sets up OpenGL double buffering
+  SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
+
+  // get a SDL surface
+  surface := SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP,
+                               videoFlags );
+
+  // Verify there is a surface
+  if ( surface = nil ) then
+  begin
+    writeln( ErrOutput, 'Video mode set failed: ' + SDL_GetError() );
+    Quit( 1 );
+  end;
+
+  // initialize OpenGL
+  initGL();
+
+  // resize the initial window
+  resizeWindow( SCREEN_WIDTH, SCREEN_HEIGHT );
+
+  // wait for events
+  while ( not done ) do
+  begin
+    { handle the events in the queue }
+
+    while ( SDL_PollEvent( @event ) <> 0 ) do
+    begin
+      case( event.type_ ) of
+        SDL_ACTIVEEVENT:
+        begin
+          // Something's happend with our focus
+          // If we are iconified, we shouldn't draw the screen
+          if ( (event.active.state and SDL_APPACTIVE) <> 0 ) then
+          begin
+            if (  event.active.gain = 0 ) then
+              isActive := false
+            else
+              isActive := true;
+          end;
+        end;
+        SDL_VIDEORESIZE:
+        begin
+          // handle resize event
+          {$IFDEF UNIX}
+          surface := SDL_SetVideoMode( event.resize.w,
+              event.resize.h,
+              16, videoFlags );
+          if ( surface = nil ) then
+          begin
+            writeln( ErrOutput, 'Could not get a surface after resize: ' + SDL_GetError( ) );
+            Quit( 1 );
+          end;
+          {$ENDIF}
+          resizeWindow( event.resize.w, event.resize.h );
+        end;
+        SDL_KEYDOWN:
+        begin
+          // handle key presses
+          handleKeyPress( @event.key.keysym );
+        end;
+        SDL_QUITEV:
+        begin
+          // handle quit requests
+          done := true;
+        end;
+      end;
+    end;
+
+    // draw the scene
+    if ( isActive ) then
+      drawGLScene( );
+  end;
+
+  // clean ourselves up and exit
+  Quit( 0 );
+end.
diff --git a/src/lib/freetype/demo/UFont.pas b/src/lib/freetype/demo/UFont.pas
new file mode 100644
index 00000000..c15ff4ca
--- /dev/null
+++ b/src/lib/freetype/demo/UFont.pas
@@ -0,0 +1,2641 @@
+unit UFont;

+

+{$IFDEF FPC}

+  {$mode delphi}{$H+}

+{$ENDIF}

+

+{$DEFINE HasInline}

+

+interface

+

+// Flip direction of y-axis.

+// Default is a cartesian coordinate system with y-axis in upper direction

+// but with USDX the y-axis is in lower direction.

+{.$DEFINE FLIP_YAXIS}

+{.$DEFINE BITMAP_FONT}  

+

+uses

+  FreeType,

+  gl,

+  glext,

+  glu,

+  sdl,

+  {$IFDEF BITMAP_FONT}

+  UTexture,

+  {$ENDIF}

+  Math,

+  Classes,

+  SysUtils;

+

+type

+

+  PGLubyteArray = ^TGLubyteArray;

+  TGLubyteArray = array[0 .. (MaxInt div SizeOf(GLubyte))-1] of GLubyte;

+  TGLubyteDynArray = array of GLubyte;

+

+  TWideStringArray = array of WideString;

+

+  TGLColor = packed record

+    case byte of

+      0: ( vals: array[0..3] of GLfloat; );

+      1: ( r, g, b, a: GLfloat; );

+  end;

+

+  TBoundsDbl = record

+    Left, Right: double;

+    Bottom, Top: double;

+  end;

+

+  TPositionDbl = record

+    X, Y: double;

+  end;

+

+  TTextureSize = record

+    Width, Height: integer;

+  end;

+

+  TBitmapCoords = record

+    Left, Top: double;

+    Width, Height: integer;

+  end;

+

+  {**

+   * Abstract base class representing a glyph.

+   *}

+  TGlyph = class

+    protected

+      function GetAdvance(): TPositionDbl; virtual; abstract;

+      function GetBounds(): TBoundsDbl; virtual; abstract;

+    public

+      procedure Render(UseDisplayLists: boolean); virtual; abstract;

+      procedure RenderReflection(); virtual; abstract;

+

+      {** Distance to next glyph (in pixels) *}

+      property Advance: TPositionDbl read GetAdvance;

+      {** Glyph bounding box (in pixels) *}

+      property Bounds: TBoundsDbl read GetBounds;

+  end;

+

+  {**

+   * Font styles used by TFont.Style

+   *}

+  TFontStyle = set of (Italic, Underline, Reflect);

+

+  {**

+   * Base font class.

+   *}

+  TFont = class

+    private

+      {** Non-virtual reset-method used in Create() and Reset() *}

+      procedure ResetIntern();

+

+    protected

+      fStyle: TFontStyle;

+      fUseKerning: boolean;

+      fLineSpacing: single;       // must be inited by subclass

+      fReflectionSpacing: single; // must be inited by subclass to -2*Descender

+      fGlyphSpacing: single;

+      fReflectionPass: boolean;

+

+      {**

+       * Splits lines in Text seperated by newline (char-code #13).

+       * @param Text: UTF-8 encoded string

+       * @param Lines: splitted WideString lines

+       *}

+      procedure SplitLines(const Text: UTF8String; var Lines: TWideStringArray);

+

+      {**

+       * Print an array of WideStrings. Each array-item is a line of text.

+       * Lines of text are seperated by the line-spacing.

+       * This is the base function for all text drawing.

+       *}

+      procedure Print(const Text: TWideStringArray); overload; virtual;

+

+      {**

+       * Draws an underline.

+       *}

+      procedure DrawUnderline(const Text: WideString); virtual;

+

+      {**

+       * Renders (one) line of text.

+       *}

+      procedure Render(const Text: WideString); virtual; abstract;

+

+      {**

+       * Returns the bounds of text-lines contained in Text.

+       * @param Advance: if true the right bound is set to the advance instead

+       *   of the minimal right bound.

+       *}

+      function BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl; overload; virtual; abstract;

+

+      {**

+       * Resets all user settings to default values.

+       * Override methods should always call the inherited version.

+       *}

+      procedure Reset(); virtual;

+

+      function GetHeight(): single; virtual; abstract;

+      function GetAscender(): single; virtual; abstract;

+      function GetDescender(): single; virtual; abstract;

+      procedure SetLineSpacing(Spacing: single); virtual;

+      function GetLineSpacing(): single; virtual;

+      procedure SetGlyphSpacing(Spacing: single); virtual;

+      function GetGlyphSpacing(): single; virtual;

+      procedure SetReflectionSpacing(Spacing: single); virtual;

+      function GetReflectionSpacing(): single; virtual;

+      procedure SetStyle(Style: TFontStyle); virtual;

+      function GetStyle(): TFontStyle; virtual;

+      function GetUnderlinePosition(): single; virtual; abstract;

+      function GetUnderlineThickness(): single; virtual; abstract;

+      procedure SetUseKerning(Enable: boolean); virtual;

+      function GetUseKerning(): boolean; virtual;

+      procedure SetReflectionPass(Enable: boolean); virtual;

+

+      {** Returns true if the current render-pass is used to draw the reflection *}

+      property ReflectionPass: boolean read fReflectionPass write SetReflectionPass;

+

+    public

+      constructor Create();

+      destructor Destroy(); override;

+

+      {**

+       * Prints a text.

+       *}

+      procedure Print(const Text: WideString); overload;

+      {** UTF-8 version of @link Print(const Text: WideString) *}

+      procedure Print(const Text: string); overload;

+

+      {**

+       * Calculates the bounding box (width and height) around Text.

+       * Works with Italic and Underline styles but reflections created

+       * with the Reflect style are not considered.

+       * Note that the width might differ due to kerning with appended text,

+       * e.g. Width('VA') <= Width('V') + Width('A').

+       * @param Advance: if set to true, Result.Right is set to the advance of

+       * the given text rather than the min. right border. The advance width is

+       * bigger than the text's width as it additionally contains the advance

+       * and glyph-spacing of the last character.

+       *}

+      function BBox(const Text: WideString; Advance: boolean = false): TBoundsDbl; overload;

+      {** UTF-8 version of @link BBox(const Text: WideString) *}

+      function BBox(const Text: UTF8String; Advance: boolean = false): TBoundsDbl; overload;

+

+      {** Font height *}

+      property Height: single read GetHeight;

+      {** Vertical distance from baseline to top of glyph *}

+      property Ascender: single read GetAscender;

+      {** Vertical distance from baseline to bottom of glyph *}

+      property Descender: single read GetDescender;

+      {** Vertical distance between two baselines *}

+      property LineSpacing: single read GetLineSpacing write SetLineSpacing;

+      {** Space between end and start of next glyph added to the advance width *}

+      property GlyphSpacing: single read GetGlyphSpacing write SetGlyphSpacing;

+      {** Distance between normal baseline and baseline of the reflection *}

+      property ReflectionSpacing: single read GetReflectionSpacing write SetReflectionSpacing;

+      {** Font style (italic/underline/...) *}

+      property Style: TFontStyle read GetStyle write SetStyle;

+      {** If set to true (default) kerning will be used if available *}

+      property UseKerning: boolean read GetUseKerning write SetUseKerning;

+  end;

+

+const

+  // max. number of mipmap levels that a TScalableFont can contain

+  cMaxMipmapLevel = 5;

+

+type

+  {**

+   * Wrapper around TFont to allow font size changes.

+   * The font is scaled to the requested size by a modelview matrix

+   * transformation (glScale) and not by rescaling the internal bitmap

+   * representation. This way changing the size is really fast but the result

+   * may lack quality on large or small scale factors.

+   *}

+  TScalableFont = class(TFont)

+    private

+      procedure ResetIntern();

+

+    protected

+      fScale: single;        ///< current height to base-font height ratio 

+      fAspect: single;       ///< width to height aspect

+      fBaseFont: TFont;      ///< shortcut for fMipmapFonts[0]

+      fUseMipmaps: boolean;  ///< true if mipmap fonts are generated

+      /// Mipmap fonts (size[level+1] = size[level]/2)

+      fMipmapFonts: array[0..cMaxMipmapLevel] of TFont;

+

+      procedure Render(const Text: WideString); override;

+      procedure Print(const Text: TWideStringArray); override;

+      function BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl; override;

+

+      {**

+       * Callback called for creation of each mipmap font.

+       * Must be defined by the subclass.

+       * Mipmaps created by this method are managed and freed by TScalableFont.

+       *}

+      function CreateMipmap(Level: integer; Scale: single): TFont; virtual; abstract;

+

+      {**

+       * Returns the mipmap level considering the current scale and projection

+       * matrix.

+       *}

+      function GetMipmapLevel(): integer;

+

+      {**

+       * Returns the scale applied to the given mipmap font.

+       * fScale * fBaseFont.Height / fMipmapFont[Level].Height

+       *}

+      function GetMipmapScale(Level: integer): single;

+

+      {**

+       * Chooses the mipmap that looks nicest with current scale and projection

+       * matrix.

+       *}

+      function ChooseMipmapFont(): TFont;

+

+      procedure SetHeight(Height: single); virtual;

+      function GetHeight(): single; override;

+      procedure SetAspect(Aspect: single); virtual;

+      function GetAspect(): single; virtual;

+      function GetAscender(): single; override;

+      function GetDescender(): single; override;

+      procedure SetLineSpacing(Spacing: single); override;

+      function GetLineSpacing(): single; override;

+      procedure SetGlyphSpacing(Spacing: single); override;

+      function GetGlyphSpacing(): single; override;

+      procedure SetReflectionSpacing(Spacing: single); override;

+      function GetReflectionSpacing(): single; override;

+      procedure SetStyle(Style: TFontStyle); override;

+      function GetStyle(): TFontStyle; override;

+      function GetUnderlinePosition(): single; override;

+      function GetUnderlineThickness(): single; override;

+      procedure SetUseKerning(Enable: boolean); override;

+

+    public

+      {**

+       * Creates a wrapper to make the base-font Font scalable.

+       * If UseMipmaps is set to true smaller fonts are created so that a

+       * resized (Height property changed) font looks nicer.

+       * The font passed is managed and freed by TScalableFont.

+       *}

+      constructor Create(Font: TFont; UseMipmaps: boolean); overload;

+

+      {**

+       * Frees memory. The fonts passed on Create() and mipmap creation

+       * are freed too. 

+       *}

+      destructor Destroy(); override;

+

+      {** @see TFont.Reset *}

+      procedure Reset(); override;

+

+      {** Font height *}

+      property Height: single read GetHeight write SetHeight;

+      {** Factor for font stretching (NewWidth = Width*Aspect), 1.0 by default *}

+      property Aspect: single read GetAspect write SetAspect;

+  end;

+

+  {**

+   * Table for storage of max. 256 glyphs.

+   * Used for the second cache level. Indexed by the LSB of the WideChar

+   * char-code.

+   *}

+  PGlyphTable = ^TGlyphTable;

+  TGlyphTable = array[0..255] of TGlyph;

+

+  {**

+   * Cache for glyphs of a single font.

+   * The cached glyphs are stored inside a hash-list.

+   * Hashing is performed in two steps:

+   * 1. the least significant byte (LSB) of the WideChar character code

+   * is removed (shr 8) and the result (we call it BaseCode here) looked up in

+   * the hash-list.

+   * 2. Each entry of the hash-list contains a table with max. 256 entries.

+   * The LSB of the char-code of a glyph is the table-offset of that glyph.

+   *}

+  TGlyphCache = class

+    private

+      fHash: TList;

+

+      {**

+       * Finds a glyph-table storing cached glyphs with base-code BaseCode

+       * (= upper char-code bytes) in the hash-list and returns the table and

+       * its index.

+       * @param InsertPos: the position of the tyble in the list if it was found,

+       *                   otherwise the position the table should be inserted

+       *}

+      function FindGlyphTable(BaseCode: cardinal; out InsertPos: integer): PGlyphTable;

+

+    public

+      constructor Create();

+      destructor Destroy(); override;

+

+      {**

+       * Add glyph Glyph with char-code ch to the cache.

+       * @returns @true on success, @false otherwise

+       *}

+      function AddGlyph(ch: WideChar; const Glyph: TGlyph): boolean;

+

+      {**

+       * Removes the glyph with char-code ch from the cache.

+       *}

+      procedure DeleteGlyph(ch: WideChar);

+

+      {**

+       * Removes the glyph with char-code ch from the cache.

+       *}

+      function GetGlyph(ch: WideChar): TGlyph;

+

+      {**

+       * Checks if a glyph with char-code ch is cached.

+       *}

+      function HasGlyph(ch: WideChar): boolean;

+

+      {**

+       * Remove and free all cached glyphs. If KeepBaseSet is set to

+       * true, cached characters in the range 0..255 will not be flushed.

+       *}

+      procedure FlushCache(KeepBaseSet: boolean);

+  end;

+

+  {**

+   * Entry of a glyph-cache's (TGlyphCache) hash.

+   * Stores a BaseCode (upper-bytes of a glyph's char-code) and a table

+   * with all glyphs cached at the moment with that BaseCode.

+   *}

+  TGlyphCacheHashEntry = class

+    private

+      fBaseCode: cardinal;

+    public

+      GlyphTable: TGlyphTable;

+

+      constructor Create(BaseCode: cardinal);

+

+      {** Base-code (upper-bytes) of the glyphs stored in this entry's table *}

+      property BaseCode: cardinal read fBaseCode;

+  end;

+

+  TCachedFont = class(TFont)

+    protected

+      fCache: TGlyphCache;

+

+      {**

+       * Retrieves a cached glyph with char-code ch from cache.

+       * If the glyph is not already cached, it is loaded with LoadGlyph().

+       *}

+      function GetGlyph(ch: WideChar): TGlyph;

+

+      {**

+       * Callback to create (load) a glyph with char-code ch.

+       * Implemented by subclasses.

+       *}

+      function LoadGlyph(ch: WideChar): TGlyph; virtual; abstract;

+

+    public

+      constructor Create();

+      destructor Destroy(); override;

+

+      {**

+       * Remove and free all cached glyphs. If KeepBaseSet is set to

+       * true, the base glyphs are not be flushed.

+       * @see TGlyphCache.FlushCache

+       *}

+      procedure FlushCache(KeepBaseSet: boolean);

+  end;

+

+  TFTFont = class;

+

+  {**

+   * Freetype glyph.

+   * Each glyph stores a texture with the glyph's image.

+   *}

+  TFTGlyph = class(TGlyph)

+    private

+      fCharIndex: FT_UInt;      ///< Freetype specific char-index (<> char-code)

+      fDisplayList: GLuint;     ///< Display-list ID

+      fTexture: GLuint;         ///< Texture ID

+      fBitmapCoords: TBitmapCoords; ///< Left/Top offset and Width/Height of the bitmap (in pixels)

+      fTexOffset: TPositionDbl; ///< Right and bottom texture offset for removal of power-of-2 padding

+      fTexSize: TTextureSize;   ///< Texture size in pixels

+

+      fFont: TFTFont;           ///< Font associated with this glyph

+      fAdvance: TPositionDbl;   ///< Advance width of this glyph

+      fBounds: TBoundsDbl;      ///< Glyph bounds

+      fOutset: single;          ///< Extrusion outset

+

+      {**

+       * Extrudes the outline of a glyph's bitmap stored in TexBuffer with size

+       * fTexSize by Outset pixels.

+       * This is useful to create bold or outlined fonts.

+       * TexBuffer must be 2*Ceil(Outset) pixels higher and wider than the

+       * original glyph bitmap, otherwise the glyph borders cannot be extruded

+       * correctly.

+       * The bitmap must be 2* pixels wider and higher than the

+       * original glyph's bitmap with the latter centered in it.

+       *}

+      procedure Extrude(var TexBuffer: TGLubyteDynArray; Outset: single);

+

+      {**

+       * Creates an OpenGL texture (and display list) for the glyph.

+       * The glyph's and bitmap's metrics are set correspondingly.

+       * @param LoadFlags: flags passed to FT_Load_Glyph()

+       * @raises Exception if the glyph could not be initialized

+       *}

+      procedure CreateTexture(LoadFlags: FT_Int32);

+

+    protected

+      function GetAdvance(): TPositionDbl; override;

+      function GetBounds(): TBoundsDbl; override;

+

+    public

+      {**

+       * Creates a glyph with char-code ch from font Font.

+       * @param LoadFlags: flags passed to FT_Load_Glyph()

+       *}

+      constructor Create(Font: TFTFont; ch: WideChar; Outset: single;

+                         LoadFlags: FT_Int32);

+      destructor Destroy(); override;

+

+      {** Renders the glyph (normal render pass) *}

+      procedure Render(UseDisplayLists: boolean); override;

+      {** Renders the glyph's reflection *}

+      procedure RenderReflection(); override;

+

+      {** Freetype specific char-index (<> char-code) *}

+      property CharIndex: FT_UInt read fCharIndex;

+  end;

+

+  {**

+   * Freetype font class.

+   *}

+  TFTFont = class(TCachedFont)

+    private

+      procedure ResetIntern();

+

+    protected

+      fFilename: string;            ///< filename of the font-file

+      fSize: integer;               ///< Font base size (in pixels)

+      fOutset: single;              ///< size of outset extrusion (in pixels)

+      fFace: FT_Face;               ///< Holds the height of the font

+      fLoadFlags: FT_Int32;         ///< FT glpyh load-flags

+      fFontUnitScale: TPositionDbl; ///< FT font-units to pixel ratio

+      fUseDisplayLists: boolean;    ///< true: use display-lists, false: direct drawing

+

+      {** @see TCachedFont.LoadGlyph *}

+      function LoadGlyph(ch: WideChar): TGlyph; override;

+

+      procedure Render(const Text: WideString); override;

+      function BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl; override;

+

+      function GetHeight(): single; override;

+      function GetAscender(): single; override;

+      function GetDescender(): single; override;

+      function GetUnderlinePosition(): single; override;

+      function GetUnderlineThickness(): single; override;

+

+      property Face: FT_Face read fFace;

+

+    public

+      {**

+       * Creates a font of size Size (in pixels) from the file Filename.

+       * If Outset (in pixels) is set to a value > 0 the glyphs will be extruded

+       * at their borders. Use it for e.g. a bold effect.

+       * @param LoadFlags: flags passed to FT_Load_Glyph()

+       * @raises Exception if the font-file could not be loaded

+       *}

+      constructor Create(const Filename: string;

+                         Size: integer; Outset: single = 0.0;

+                         LoadFlags: FT_Int32 = FT_LOAD_DEFAULT);

+

+      {**

+       * Frees all resources associated with the font.

+       *}

+      destructor Destroy(); override;

+

+      {** @see TFont.Reset *}

+      procedure Reset(); override;

+      

+      {** Size of the base font *}

+      property Size: integer read fSize;

+      {** Outset size *}

+      property Outset: single read fOutset;

+  end;

+

+  TFTScalableFont = class(TScalableFont)

+    protected

+      function GetOutset(): single; virtual;

+      function CreateMipmap(Level: integer; Scale: single): TFont; override;

+

+    public

+      {**

+       * Creates a scalable font of size Size (in pixels) from the file Filename.

+       * OutsetAmount is the ratio of the glyph extrusion.

+       * The extrusion in pixels is Size*OutsetAmount

+       * (0.0 -> no extrusion, 0.1 -> 10%).

+       *}

+      constructor Create(const Filename: string;

+                         Size: integer; OutsetAmount: single = 0.0;

+                         UseMipmaps: boolean = true);

+

+      {** @see TGlyphCache.FlushCache *}

+      procedure FlushCache(KeepBaseSet: boolean);

+

+      {** Outset size (in pixels) of the scaled font *}

+      property Outset: single read GetOutset;

+  end;

+

+  

+  {**

+   * Represents a freetype font with an additional outline around its glyphs.

+   * The outline size is passed on creation and cannot be changed later.

+   *}

+  TFTOutlineFont = class(TFont)

+    private

+      fFilename: string;

+      fSize: integer;

+      fOutset: single;

+      fInnerFont, fOutlineFont: TFTFont;

+      fOutlineColor: TGLColor;

+

+      procedure ResetIntern();

+      

+  protected

+      procedure DrawUnderline(const Text: WideString); override;

+      procedure Render(const Text: WideString); override;

+      function BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl; override;

+

+      function GetHeight(): single; override;

+      function GetAscender(): single; override;

+      function GetDescender(): single; override;

+      procedure SetLineSpacing(Spacing: single); override;

+      procedure SetGlyphSpacing(Spacing: single); override;

+      procedure SetReflectionSpacing(Spacing: single); override;

+      procedure SetStyle(Style: TFontStyle); override;

+      function GetStyle(): TFontStyle; override;

+      function GetUnderlinePosition(): single; override;

+      function GetUnderlineThickness(): single; override;

+      procedure SetUseKerning(Enable: boolean); override;

+      procedure SetReflectionPass(Enable: boolean); override;

+

+    public

+      constructor Create(const Filename: string;

+                         Size: integer; Outset: single;

+                         LoadFlags: FT_Int32 = FT_LOAD_DEFAULT);

+      destructor Destroy; override;

+

+      {** Sets the color of the outline *}

+      procedure SetOutlineColor(r, g, b: GLfloat; a: GLfloat = 1.0);

+

+      {** @see TGlyphCache.FlushCache *}

+      procedure FlushCache(KeepBaseSet: boolean);

+

+      {** @see TFont.Reset *}

+      procedure Reset(); override;

+      

+      {** Size of the base font *}

+      property Size: integer read fSize;

+      {** Outset size *}

+      property Outset: single read fOutset;

+  end;

+

+  {**

+   * Wrapper around TOutlineFont to allow font resizing.

+   * @see TScalableFont

+   *}

+  TFTScalableOutlineFont = class(TScalableFont)

+    protected

+      function GetOutset(): single; virtual;

+      function CreateMipmap(Level: integer; Scale: single): TFont; override;

+

+    public

+      constructor Create(const Filename: string;

+                         Size: integer; OutsetAmount: single;

+                         UseMipmaps: boolean = true);

+

+      {** Sets the color of the outline *}

+      procedure SetOutlineColor(r, g, b: GLfloat; a: GLfloat = 1.0);

+

+      {** @see TGlyphCache.FlushCache *}

+      procedure FlushCache(KeepBaseSet: boolean);

+      

+      {** Outset size *}

+      property Outset: single read GetOutset;

+  end;

+

+{$IFDEF BITMAP_FONT}

+

+  {**

+   * A bitmapped font loads it's glyphs from a bitmap and stores them in a

+   * texture. Unicode characters are not supported (but could be by supporting

+   * multiple textures each storing a subset of unicode glyphs).

+   * For backward compatibility only.

+   *}

+  TBitmapFont = class(TFont)

+    private

+      fTex:       TTexture;

+      fTexSize:   integer;

+      fBaseline:  integer;

+      fAscender:  integer;

+      fDescender: integer;

+      fWidths:    array[0..255] of byte; // half widths

+      fOutline:   integer;

+      fTempColor: TGLColor; ///< colours for the reflection

+

+      procedure ResetIntern();

+

+      procedure RenderChar(ch: WideChar; var AdvanceX: real);

+

+      {**

+       * Load font widths from an info file.

+       * @param InfoFile: the name of the info (.dat) file

+       * @raises Exception if the file is corrupted

+       *}

+      procedure LoadFontInfo(const InfoFile: string);

+

+    protected

+      procedure Render(const Text: WideString); override;

+      function BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl; override;

+

+      function GetHeight(): single; override;

+      function GetAscender(): single; override;

+      function GetDescender(): single; override;

+      function GetUnderlinePosition(): single; override;

+      function GetUnderlineThickness(): single; override;

+

+    public

+      {**

+       * Creates a bitmapped font from image Filename and font width info

+       * loaded from the corresponding file with ending .dat.

+       * @param Baseline: y-coord of the baseline given in cartesian coords

+       *        (y-axis up) and from the lower edge of the glyphs bounding box

+       * @param Ascender: pixels from baseline to top of highest glyph

+       *}

+      constructor Create(const Filename: string; Outline: integer;

+                         Baseline, Ascender, Descender: integer);

+      destructor Destroy(); override;

+

+      {**

+       * Corrects font widths provided by the info file.

+       * NewWidth := Width * WidthMult + WidthAdd

+       *}

+      procedure CorrectWidths(WidthMult: real; WidthAdd: integer);

+

+      {** @see TFont.Reset *}

+      procedure Reset(); override;

+  end;

+

+{$ENDIF BITMAP_FONT}

+

+  TFreeType = class

+    public

+      {**

+       * Returns a pointer to the freetype library singleton.

+       * If non exists, freetype will be initialized.

+       * @raises Exception if initialization failed

+       *}

+      class function GetLibrary(): FT_Library;

+      class procedure FreeLibrary();

+  end;

+

+

+implementation

+

+uses Types;

+

+const

+  // shear factor used for the italic effect (bigger value -> more bending)

+  cShearFactor = 0.25;

+  cShearMatrix: array[0..15] of GLfloat = (

+      1,            0, 0, 0,

+      cShearFactor, 1, 0, 0,

+      0,            0, 1, 0,

+      0,            0, 0, 1

+  );

+  cShearMatrixInv: array[0..15] of GLfloat = (

+      1,             0, 0, 0,

+      -cShearFactor, 1, 0, 0,

+      0,             0, 1, 0,

+      0,             0, 0, 1

+  );

+

+var

+  LibraryInst: FT_Library;

+

+function NewGLColor(r, g, b, a: GLfloat): TGLColor;

+begin

+  Result.r := r;

+  Result.g := g;

+  Result.b := b;

+  Result.a := a;

+end;

+

+{**

+ * Returns the first power of 2 >= Value.

+ *}

+function NextPowerOf2(Value: integer): integer; {$IFDEF HasInline}inline;{$ENDIF}

+begin

+  Result := 1;

+  while (Result < Value) do

+    Result := Result shl 1;

+end;

+

+

+{*

+ * TFont

+ *}

+

+constructor TFont.Create();

+begin

+  inherited;

+  ResetIntern();

+end;

+

+destructor TFont.Destroy();

+begin

+  inherited;

+end;

+

+procedure TFont.ResetIntern();

+begin

+  fStyle := [];

+  fUseKerning := true;

+  fGlyphSpacing := 0.0;

+  fReflectionPass := false;

+

+  // must be set by subclasses

+  fLineSpacing := 0.0;

+  fReflectionSpacing := 0.0;

+end;

+

+procedure TFont.Reset();

+begin

+  ResetIntern();

+end;

+

+procedure TFont.SplitLines(const Text: UTF8String; var Lines: TWideStringArray);

+var

+  LineList: TStringList;

+  LineIndex: integer;

+begin

+  // split lines on newline (there is no WideString version of ExtractStrings)

+  LineList := TStringList.Create();

+  ExtractStrings([#13], [], PChar(Text), LineList);

+

+  // create an array of WideStrins from the UTF-8 string-list

+  SetLength(Lines, LineList.Count);

+  for LineIndex := 0 to LineList.Count-1 do

+    Lines[LineIndex] := UTF8Decode(LineList[LineIndex]);

+  LineList.Free();

+end;

+

+function TFont.BBox(const Text: UTF8String; Advance: boolean): TBoundsDbl;

+var

+  LineArray: TWideStringArray;

+begin

+  SplitLines(Text, LineArray);

+  Result := BBox(LineArray, Advance);

+  SetLength(LineArray, 0);

+end;

+

+function TFont.BBox(const Text: WideString; Advance: boolean): TBoundsDbl;

+begin

+  Result := BBox(UTF8Encode(Text), Advance);

+end;

+

+procedure TFont.Print(const Text: TWideStringArray);

+var

+  LineIndex: integer;

+begin

+  // recursively call this function to draw reflected text

+  if ((Reflect in Style) and not ReflectionPass) then

+  begin

+    ReflectionPass := true;

+    Print(Text);

+    ReflectionPass := false;

+  end;

+

+  // store current color, enable-flags, matrix-mode

+  glPushAttrib(GL_CURRENT_BIT or GL_ENABLE_BIT or GL_TRANSFORM_BIT);

+

+  // set OpenGL state

+  glMatrixMode(GL_MODELVIEW);

+  glDisable(GL_DEPTH_TEST);

+  glEnable(GL_BLEND);

+  glEnable(GL_TEXTURE_2D);

+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

+

+  {

+  // TODO: just draw texels with alpha > 0 to avoid setting z-buffer for them?

+  glAlphaFunc(GL_GREATER, 0);

+  glEnable(GL_ALPHA_TEST);

+

+  //TODO: Do we need depth-testing?

+  if (ReflectionPass) then

+  begin

+    glDepthMask(0);

+    glEnable(GL_DEPTH_TEST);

+  end;

+  }

+

+  {$IFDEF FLIP_YAXIS}

+  glPushMatrix();

+  glScalef(1, -1, 1);

+  {$ENDIF}

+

+  // display text

+  for LineIndex := 0 to High(Text) do

+  begin

+    glPushMatrix();

+

+    // move to baseline

+    glTranslatef(0, -LineSpacing*LineIndex, 0);

+

+    if ((Underline in Style) and not ReflectionPass) then

+    begin

+      glDisable(GL_TEXTURE_2D);

+      DrawUnderline(Text[LineIndex]);

+      glEnable(GL_TEXTURE_2D);

+    end;

+

+    // draw reflection

+    if (ReflectionPass) then

+    begin

+      // set reflection spacing

+      glTranslatef(0, -ReflectionSpacing, 0);

+      // flip y-axis

+      glScalef(1, -1, 1);

+    end;

+

+    // shear for italic effect

+    if (Italic in Style) then

+      glMultMatrixf(@cShearMatrix);

+

+    // render text line

+    Render(Text[LineIndex]);

+

+    glPopMatrix();

+  end;

+

+  // restore settings

+  {$IFDEF FLIP_YAXIS}

+  glPopMatrix();

+  {$ENDIF}

+  glPopAttrib();

+end;

+

+procedure TFont.Print(const Text: string);

+var

+  LineArray: TWideStringArray;

+begin

+  SplitLines(Text, LineArray);

+  Print(LineArray);

+  SetLength(LineArray, 0);

+end;

+

+procedure TFont.Print(const Text: WideString);

+begin

+  Print(UTF8Encode(Text));

+end;

+

+procedure TFont.DrawUnderline(const Text: WideString);

+var

+  UnderlineY1, UnderlineY2: single;

+  Bounds: TBoundsDbl;

+begin

+  UnderlineY1 := GetUnderlinePosition();

+  UnderlineY2 := UnderlineY1 + GetUnderlineThickness();

+  Bounds := BBox(Text);

+  glRectf(Bounds.Left, UnderlineY1, Bounds.Right, UnderlineY2);

+end;

+

+procedure TFont.SetStyle(Style: TFontStyle);

+begin

+  fStyle := Style;

+end;

+

+function TFont.GetStyle(): TFontStyle;

+begin

+  Result := fStyle;

+end;

+

+procedure TFont.SetLineSpacing(Spacing: single);

+begin

+  fLineSpacing := Spacing;

+end;

+

+function TFont.GetLineSpacing(): single;

+begin

+  Result := fLineSpacing;

+end;

+

+procedure TFont.SetGlyphSpacing(Spacing: single);

+begin

+  fGlyphSpacing := Spacing;

+end;

+

+function TFont.GetGlyphSpacing(): single;

+begin

+  Result := fGlyphSpacing;

+end;

+

+procedure TFont.SetReflectionSpacing(Spacing: single);

+begin

+  fReflectionSpacing := Spacing;

+end;

+

+function TFont.GetReflectionSpacing(): single;

+begin

+  Result := fReflectionSpacing;

+end;

+

+procedure TFont.SetUseKerning(Enable: boolean);

+begin

+  fUseKerning := Enable;

+end;

+

+function TFont.GetUseKerning(): boolean;

+begin

+  Result := fUseKerning;

+end;

+

+procedure TFont.SetReflectionPass(Enable: boolean);

+begin

+  fReflectionPass := Enable;

+end;

+

+

+{*

+ * TScalableFont

+ *}

+

+constructor TScalableFont.Create(Font: TFont; UseMipmaps: boolean);

+var

+  MipmapLevel: integer;

+begin

+  inherited Create();

+  

+  fBaseFont := Font;

+  fMipmapFonts[0] := Font;

+  fUseMipmaps := UseMipmaps;

+  ResetIntern();

+

+  // create mipmap fonts if requested

+  if (UseMipmaps) then

+  begin

+    for MipmapLevel := 1 to cMaxMipmapLevel do

+    begin

+      fMipmapFonts[MipmapLevel] := CreateMipmap(MipmapLevel, 1/(1 shl MipmapLevel));

+      // stop if no smaller mipmap font is returned

+      if (fMipmapFonts[MipmapLevel] = nil) then

+        Break;

+    end;

+  end;

+end;

+

+destructor TScalableFont.Destroy();

+var

+  Level: integer;

+begin

+  for Level := 0 to High(fMipmapFonts) do

+    fMipmapFonts[Level].Free;

+  inherited;

+end;

+

+procedure TScalableFont.ResetIntern();

+begin

+  fScale := 1.0;

+  fAspect := 1.0;

+end;

+

+procedure TScalableFont.Reset();

+var

+  Level: integer;

+begin

+  inherited;

+  ResetIntern();

+  for Level := 0 to High(fMipmapFonts) do

+    if (fMipmapFonts[Level] <> nil) then

+      fMipmapFonts[Level].Reset();

+end;

+

+{**

+ * Returns the mipmap level to use with regard to the current projection

+ * and modelview matrix, font scale and aspect.

+ *

+ * Note:

+ * - for Freetype fonts, hinting and grid-fitting must be disabled, otherwise

+ *   the glyph widths/heights ratios and advance widths of the mipmap fonts

+ *   do not match as they are adjusted sligthly (e.g. an 'a' at size 12px has

+ *   width 12px, but at size 6px width 8px).

+ * - returned mipmap-level is used for all glyphs of the current text to print.

+ *   This is faster, much easier to handle, since we just need to create

+ *   multiple sized fonts and select the one we need for the mipmap-level and

+ *   it avoids that neighbored glyphs use different mipmap-level which might

+ *   look odd because one glyph might look blurry and the other sharp.

+ *

+ * Motivation:

+ *   We do not use OpenGL for mipmapping as the results are very bad. At least

+ *   with automatic mipmap generation (gluBuildMipmaps) the fonts look rather

+ *   blurry.

+ *   Defining our own mipmaps by creating multiple textures with

+ *   for different mimap levels is a pain, as the font size passed to freetype

+ *   is not the size of the bitmaps created and it does not guarantee that a

+ *   glyph bitmap of a font with font-size s/2 is half the size of the font with

+ *   font-size s. If the bitmap size is just a single pixel bigger than the half

+ *   we might need a texture of the next power-of-2 and the texture would not be

+ *   half of the size of the next bigger mipmap. In addition we use a fixed one

+ *   pixel sized border to smooth the texture (see cTexSmoothBorder) and maybe

+ *   an outset that is added to the font, so creating a glyph mipmap that is

+ *   exactly half the size of the next bigger one is a very difficult task.

+ *

+ * Solution:

+ *   Use mipmap textures that are not exactly half the size of the next mipmap

+ *   level. OpenGL does not support this (at least not without extensions).

+ *   The trickiest task is to determine the mipmap to use by calculating the

+ *   amount of minification that is performed in this function.

+ *}

+function TScalableFont.GetMipmapLevel(): integer;

+var

+  ModelMatrix, ProjMatrix: T16dArray;

+  WinCoords: array[0..2, 0..2] of GLdouble;

+  ViewPortArray: TViewPortArray;

+  Dist, Dist2: double;

+  WidthScale, HeightScale: double;

+const

+  // width/height of square used for determining the scale

+  cTestSize = 10.0;

+  // an offset to the mipmap-level to adjust the change-over of two consecutive

+  // mipmap levels. If for example the bias is 0.1 and unbiased level is 1.9

+  // the result level will be 2. A bias of 0.5 is equal to rounding.

+  // With bias=0.1 we prefer larger mipmaps over smaller ones.

+  cBias = 0.2;

+begin

+  // 1. retrieve current transformation matrices for gluProject

+  glGetDoublev(GL_MODELVIEW_MATRIX, @ModelMatrix);

+  glGetDoublev(GL_PROJECTION_MATRIX, @ProjMatrix);

+  glGetIntegerv(GL_VIEWPORT, @ViewPortArray);

+

+  // 2. project three of the corner points of a square with size cTestSize

+  // to window coordinates (the square is just a dummy for a glyph)

+

+  // project point (x1, y1) to window corrdinates

+  gluProject(0, 0, 0,

+             ModelMatrix, ProjMatrix, ViewPortArray,

+             @WinCoords[0][0], @WinCoords[0][1], @WinCoords[0][2]);

+  // project point (x2, y1) to window corrdinates

+  gluProject(cTestSize, 0, 0,

+             ModelMatrix, ProjMatrix, ViewPortArray,

+             @WinCoords[1][0], @WinCoords[1][1], @WinCoords[1][2]);

+  // project point (x1, y2) to window corrdinates

+  gluProject(0, cTestSize, 0,

+             ModelMatrix, ProjMatrix, ViewPortArray,

+             @WinCoords[2][0], @WinCoords[2][1], @WinCoords[2][2]);

+

+  // 3. Lets see how much the width and height of the square changed.

+  // Calculate the width and height as displayed on the screen in window

+  // coordinates and calculate the ratio to the original coordinates in

+  // modelview space so the ratio gives us the scale (minification here).

+

+  // projected width ||(x1, y1) - (x2, y1)||

+  Dist  := (WinCoords[0][0] - WinCoords[1][0]);

+  Dist2 := (WinCoords[0][1] - WinCoords[1][1]);

+  WidthScale := cTestSize / Sqrt(Dist*Dist + Dist2*Dist2);

+

+  // projected height ||(x1, y1) - (x1, y2)||

+  Dist  := (WinCoords[0][0] - WinCoords[2][0]);

+  Dist2 := (WinCoords[0][1] - WinCoords[2][1]);

+  HeightScale := cTestSize / Sqrt(Dist*Dist + Dist2*Dist2);

+

+  //writeln(Format('Scale %f, %f', [WidthScale, HeightScale]));

+

+  // 4. Now that we have got the scale, take the bigger minification scale

+  // and get it to a logarithmic scale as each mipmap is 1/2 the size of its

+  // predecessor (Mipmap_size[i] = Mipmap_size[i-1]/2).

+  // The result is our mipmap-level = the index of the mipmap to use.

+

+  // Level > 0: Minification; < 0: Magnification

+  Result := Trunc(Log2(Max(WidthScale, HeightScale)) + cBias);

+

+  // clamp to valid range

+  if (Result < 0) then

+    Result := 0;

+  if (Result > High(fMipmapFonts)) then

+    Result := High(fMipmapFonts);

+end;

+

+function TScalableFont.GetMipmapScale(Level: integer): single;

+begin

+  if (fMipmapFonts[Level] = nil) then

+  begin

+    Result := -1;

+    Exit;

+  end;

+

+  Result := fScale * fMipmapFonts[0].Height / fMipmapFonts[Level].Height;

+end;

+

+{**

+ * Returns the correct mipmap font for the current scale and projection

+ * matrix. The modelview scale is adjusted to the mipmap level, so

+ * Result.Print() will display the font in the correct size.

+ *}

+function TScalableFont.ChooseMipmapFont(): TFont;

+var

+  DesiredLevel: integer;

+  Level: integer;

+  MipmapScale: single;

+begin

+  Result := nil;

+  DesiredLevel := GetMipmapLevel();

+

+  // get the smallest mipmap available for the desired level

+  // as not all levels must be assigned to a font.

+  for Level := DesiredLevel downto 0 do

+  begin

+    if (fMipmapFonts[Level] <> nil) then

+    begin

+      Result := fMipmapFonts[Level];

+      Break;

+    end;

+  end;

+

+  // since the mipmap font (if level > 0) is smaller than the base-font

+  // we have to scale to get its size right.

+  MipmapScale := fMipmapFonts[0].Height/Result.Height;

+  glScalef(MipmapScale, MipmapScale, 0);

+end;

+

+procedure TScalableFont.Print(const Text: TWideStringArray);

+begin

+  glPushMatrix();

+  glScalef(fScale * fAspect, fScale, 0);

+  if (fUseMipmaps) then

+    ChooseMipmapFont().Print(Text)

+  else

+    fBaseFont.Print(Text);

+  glPopMatrix();

+end;

+

+procedure TScalableFont.Render(const Text: WideString);

+begin

+  Assert(false, 'Unused TScalableFont.Render() was called');

+end;

+

+function TScalableFont.BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl;

+begin

+  Result := fBaseFont.BBox(Text, Advance);

+  Result.Left   := Result.Left * fScale;

+  Result.Right  := Result.Right * fScale;

+  Result.Top    := Result.Top * fScale;

+  Result.Bottom := Result.Bottom * fScale;

+end;

+

+procedure TScalableFont.SetHeight(Height: single);

+begin

+  fScale := Height / fBaseFont.GetHeight();

+end;

+

+function TScalableFont.GetHeight(): single;

+begin

+  Result := fBaseFont.GetHeight() * fScale;

+end;

+

+procedure TScalableFont.SetAspect(Aspect: single);

+begin

+  fAspect := Aspect;

+end;

+

+function TScalableFont.GetAspect(): single;

+begin

+  Result := fAspect;

+end;

+

+function TScalableFont.GetAscender(): single;

+begin

+  Result := fBaseFont.GetAscender() * fScale;

+end;

+

+function TScalableFont.GetDescender(): single;

+begin

+  Result := fBaseFont.GetDescender() * fScale;

+end;

+

+procedure TScalableFont.SetLineSpacing(Spacing: single);

+var

+  Level: integer;

+begin

+  for Level := 0 to High(fMipmapFonts) do

+    if (fMipmapFonts[Level] <> nil) then

+      fMipmapFonts[Level].SetLineSpacing(Spacing / GetMipmapScale(Level));

+end;

+

+function TScalableFont.GetLineSpacing(): single;

+begin

+  Result := fBaseFont.GetLineSpacing() * fScale;

+end;

+

+procedure TScalableFont.SetGlyphSpacing(Spacing: single);

+var

+  Level: integer;

+begin

+  for Level := 0 to High(fMipmapFonts) do

+    if (fMipmapFonts[Level] <> nil) then

+      fMipmapFonts[Level].SetGlyphSpacing(Spacing / GetMipmapScale(Level));

+end;

+

+function TScalableFont.GetGlyphSpacing(): single;

+begin

+  Result := fBaseFont.GetGlyphSpacing() * fScale;

+end;

+

+procedure TScalableFont.SetReflectionSpacing(Spacing: single);

+var

+  Level: integer;

+begin

+  for Level := 0 to High(fMipmapFonts) do

+    if (fMipmapFonts[Level] <> nil) then

+      fMipmapFonts[Level].SetReflectionSpacing(Spacing / GetMipmapScale(Level));

+end;

+

+function TScalableFont.GetReflectionSpacing(): single;

+begin

+  Result := fBaseFont.GetLineSpacing() * fScale;

+end;

+

+procedure TScalableFont.SetStyle(Style: TFontStyle);

+var

+  Level: integer;

+begin

+  for Level := 0 to High(fMipmapFonts) do

+    if (fMipmapFonts[Level] <> nil) then

+      fMipmapFonts[Level].SetStyle(Style);

+end;

+

+function TScalableFont.GetStyle(): TFontStyle;

+begin

+  Result := fBaseFont.GetStyle();

+end;

+

+function TScalableFont.GetUnderlinePosition(): single;

+begin

+  Result := fBaseFont.GetUnderlinePosition();

+end;

+

+function TScalableFont.GetUnderlineThickness(): single;

+begin

+  Result := fBaseFont.GetUnderlinePosition();

+end;

+

+procedure TScalableFont.SetUseKerning(Enable: boolean);

+var

+  Level: integer;

+begin

+  for Level := 0 to High(fMipmapFonts) do

+    if (fMipmapFonts[Level] <> nil) then

+      fMipmapFonts[Level].SetUseKerning(Enable);

+end;

+

+

+{*

+ * TCachedFont

+ *}

+

+constructor TCachedFont.Create();

+begin

+  inherited;

+  fCache := TGlyphCache.Create();

+end;

+

+destructor TCachedFont.Destroy();

+begin

+  fCache.Free;

+  inherited;

+end;

+

+function TCachedFont.GetGlyph(ch: WideChar): TGlyph;

+begin

+  Result := fCache.GetGlyph(ch);

+  if (Result = nil) then

+  begin

+    Result := LoadGlyph(ch);

+    if (not fCache.AddGlyph(ch, Result)) then

+      Result.Free;

+  end;

+end;

+

+procedure TCachedFont.FlushCache(KeepBaseSet: boolean);

+begin

+  fCache.FlushCache(KeepBaseSet);

+end;

+

+

+{*

+ * TFTFont

+ *}

+

+constructor TFTFont.Create(

+    const Filename: string;

+    Size: integer; Outset: single;

+    LoadFlags: FT_Int32);

+var

+  i: WideChar;

+begin

+  inherited Create();

+

+  fFilename := Filename;

+  fSize := Size;

+  fOutset := Outset;

+  fLoadFlags := LoadFlags;

+  fUseDisplayLists := true;

+

+  // load font information

+  if (FT_New_Face(TFreeType.GetLibrary(), PChar(Filename), 0, fFace) <> 0) then

+    raise Exception.Create('FT_New_Face: Could not load font '''  + Filename + '''');

+

+  // support scalable fonts only

+  if (not FT_IS_SCALABLE(fFace)) then

+    raise Exception.Create('Font is not scalable');

+

+  if (FT_Set_Pixel_Sizes(fFace, 0, Size) <> 0) then

+    raise Exception.Create('FT_Set_Pixel_Sizes failes');

+

+  // get scale factor for font-unit to pixel-size transformation

+  fFontUnitScale.X := fFace.size.metrics.x_ppem / fFace.units_per_EM;

+  fFontUnitScale.Y := fFace.size.metrics.y_ppem / fFace.units_per_EM;

+

+  ResetIntern();

+

+  // pre-cache some commonly used glyphs (' ' - '~')

+  for i := #32 to #126 do

+    fCache.AddGlyph(i, TFTGlyph.Create(Self, i, Outset, LoadFlags));

+end;

+

+destructor TFTFont.Destroy();

+begin

+  // free face

+  FT_Done_Face(fFace);

+  inherited;

+end;

+

+procedure TFTFont.ResetIntern();

+begin

+  // Note: outset and non outset fonts use same spacing

+  fLineSpacing := fFace.height * fFontUnitScale.Y;

+  fReflectionSpacing := -2*fFace.descender * fFontUnitScale.Y;

+end;

+

+procedure TFTFont.Reset();

+begin

+  inherited;

+  ResetIntern();

+end;

+

+function TFTFont.LoadGlyph(ch: WideChar): TGlyph;

+begin

+  Result := TFTGlyph.Create(Self, ch, Outset, fLoadFlags);

+end;

+

+function TFTFont.BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl;

+var

+  Glyph, PrevGlyph: TFTGlyph;

+  TextLine: WideString;

+  LineYOffset: single;

+  LineIndex, CharIndex: integer;

+  LineBounds: TBoundsDbl;

+  KernDelta: FT_Vector;

+  UnderlinePos: double;

+begin

+  // Reset global bounds

+  Result.Left   := Infinity;

+  Result.Right  := 0;

+  Result.Bottom := Infinity;

+  Result.Top    := 0;

+

+  // reset last glyph

+  PrevGlyph := nil;

+

+  // display text

+  for LineIndex := 0 to High(Text) do

+  begin

+    // get next text line

+    TextLine := Text[LineIndex];

+    LineYOffset := -LineSpacing * LineIndex;

+

+    // reset line bounds

+    LineBounds.Left   := Infinity;

+    LineBounds.Right  := 0;

+    LineBounds.Bottom := Infinity;

+    LineBounds.Top    := 0;

+

+    // for each glyph image, compute its bounding box

+    for CharIndex := 1 to Length(TextLine) do

+    begin

+      Glyph := TFTGlyph(GetGlyph(TextLine[CharIndex]));

+      if (Glyph <> nil) then

+      begin

+        // get kerning

+        if (fUseKerning and FT_HAS_KERNING(fFace) and (PrevGlyph <> nil)) then

+        begin

+          FT_Get_Kerning(fFace, PrevGlyph.CharIndex, Glyph.CharIndex,

+                         FT_KERNING_UNSCALED, KernDelta);

+          LineBounds.Right := LineBounds.Right + KernDelta.x * fFontUnitScale.X;

+        end;

+

+        // update left bound (must be done before right bound is updated)

+        if (LineBounds.Right + Glyph.Bounds.Left < LineBounds.Left) then

+          LineBounds.Left := LineBounds.Right + Glyph.Bounds.Left;

+

+        // update right bound

+        if (CharIndex < Length(TextLine)) or  // not the last character

+           (TextLine[CharIndex] = ' ') or     // on space char (Bounds.Right = 0)

+           Advance then                       // or in advance mode

+        begin

+          // add advance and glyph spacing

+          LineBounds.Right := LineBounds.Right + Glyph.Advance.x + GlyphSpacing

+        end

+        else

+        begin

+          // add glyph's right bound

+          LineBounds.Right := LineBounds.Right + Glyph.Bounds.Right;

+        end;

+

+        // update bottom and top bounds

+        if (Glyph.Bounds.Bottom < LineBounds.Bottom) then

+          LineBounds.Bottom := Glyph.Bounds.Bottom;

+        if (Glyph.Bounds.Top > LineBounds.Top) then

+          LineBounds.Top := Glyph.Bounds.Top;

+      end;

+

+      PrevGlyph := Glyph;

+    end;

+

+    // handle italic font style

+    if (Italic in Style) then

+    begin

+      LineBounds.Left := LineBounds.Left + LineBounds.Bottom * cShearFactor;

+      LineBounds.Right := LineBounds.Right + LineBounds.Top * cShearFactor;

+    end;

+

+    // handle underlined font style

+    if (Underline in Style) then

+    begin

+      UnderlinePos := GetUnderlinePosition();

+      if (UnderlinePos < LineBounds.Bottom) then

+        LineBounds.Bottom := UnderlinePos;

+    end;

+

+    // add line offset

+    LineBounds.Bottom := LineBounds.Bottom + LineYOffset;

+    LineBounds.Top := LineBounds.Top + LineYOffset;

+

+    // adjust global bounds

+    if (Result.Left > LineBounds.Left) then

+      Result.Left := LineBounds.Left;

+    if (Result.Right < LineBounds.Right) then

+      Result.Right := LineBounds.Right;

+    if (Result.Bottom > LineBounds.Bottom) then

+      Result.Bottom := LineBounds.Bottom;

+    if (Result.Top < LineBounds.Top) then

+      Result.Top := LineBounds.Top;

+  end;

+

+  // if left or bottom bound was not set, set them to 0

+  if (Result.Left = Infinity) then

+    Result.Left := 0.0;

+  if (Result.Bottom = Infinity) then

+    Result.Bottom := 0.0;

+end;

+

+procedure TFTFont.Render(const Text: WideString);

+var

+  CharIndex: integer;

+  Glyph, PrevGlyph: TFTGlyph;

+  KernDelta: FT_Vector;

+begin

+  // reset last glyph

+  PrevGlyph := nil;

+

+  // draw current line

+  for CharIndex := 1 to Length(Text) do

+  begin

+    Glyph := TFTGlyph(GetGlyph(Text[CharIndex]));

+    if (Assigned(Glyph)) then

+    begin

+      // get kerning

+      if (fUseKerning and FT_HAS_KERNING(fFace) and (PrevGlyph <> nil)) then

+      begin

+        FT_Get_Kerning(fFace, PrevGlyph.CharIndex, Glyph.CharIndex,

+                       FT_KERNING_UNSCALED, KernDelta);

+        glTranslatef(KernDelta.x * fFontUnitScale.X, 0, 0);

+      end;

+

+      if (ReflectionPass) then

+        Glyph.RenderReflection()

+      else

+        Glyph.Render(fUseDisplayLists);

+

+      glTranslatef(Glyph.Advance.x + fGlyphSpacing, 0, 0);

+    end;

+

+    PrevGlyph := Glyph;

+  end;

+end;

+

+function TFTFont.GetHeight(): single;

+begin

+  Result := Ascender - Descender;

+end;

+

+function TFTFont.GetAscender(): single;

+begin

+  Result := fFace.ascender * fFontUnitScale.Y + Outset*2;

+end;

+

+function TFTFont.GetDescender(): single;

+begin

+  // Note: outset is not part of the descender as the baseline is lifted

+  Result := fFace.descender * fFontUnitScale.Y;

+end;

+

+function TFTFont.GetUnderlinePosition(): single;

+begin

+  Result := fFace.underline_position * fFontUnitScale.Y - Outset;

+end;

+

+function TFTFont.GetUnderlineThickness(): single;

+begin

+  Result := fFace.underline_thickness * fFontUnitScale.Y + Outset*2;

+end;

+

+

+{*

+ * TFTScalableFont

+ *}

+

+constructor TFTScalableFont.Create(const Filename: string;

+                   Size: integer; OutsetAmount: single;

+                   UseMipmaps: boolean);

+var

+  LoadFlags: FT_Int32;

+begin

+  LoadFlags := FT_LOAD_DEFAULT;

+  // Disable hinting and grid-fitting to preserve font outlines at each font

+  // size, otherwise the font widths/heights do not match resulting in ugly

+  // text size changes during zooming.

+  // A drawback is a reduced quality with smaller font sizes but it is not that

+  // bad with gray-scaled rendering (at least it looks better than OpenGL's

+  // linear downscaling on minification).

+  if (UseMipmaps) then

+    LoadFlags := LoadFlags or FT_LOAD_NO_HINTING;

+  inherited Create(

+      TFTFont.Create(Filename, Size, Size * OutsetAmount, LoadFlags),

+      UseMipmaps);

+end;

+

+function TFTScalableFont.CreateMipmap(Level: integer; Scale: single): TFont;

+var

+  ScaledSize: integer;

+  BaseFont: TFTFont;

+begin

+  Result := nil;

+  BaseFont := TFTFont(fBaseFont);

+  ScaledSize := Round(BaseFont.Size * Scale);

+  // do not create mipmap fonts < 8 pixels

+  if (ScaledSize < 8) then

+    Exit;

+  Result := TFTFont.Create(BaseFont.fFilename,

+      ScaledSize, BaseFont.fOutset * Scale,

+      FT_LOAD_DEFAULT or FT_LOAD_NO_HINTING);

+end;

+

+function TFTScalableFont.GetOutset(): single;

+begin

+  Result := TFTFont(fBaseFont).Outset * fScale;

+end;

+

+procedure TFTScalableFont.FlushCache(KeepBaseSet: boolean);

+var

+  Level: integer;

+begin

+  for Level := 0 to High(fMipmapFonts) do

+    if (fMipmapFonts[Level] <> nil) then

+      TFTFont(fMipmapFonts[Level]).FlushCache(KeepBaseSet);

+end;

+

+

+{*

+ * TOutlineFont

+ *}

+

+constructor TFTOutlineFont.Create(

+    const Filename: string;

+    Size: integer; Outset: single;

+    LoadFlags: FT_Int32);

+begin

+  inherited Create();

+

+  fFilename := Filename;

+  fSize := Size;

+  fOutset := Outset;

+

+  fInnerFont := TFTFont.Create(Filename, Size, 0.0, LoadFlags);

+  fOutlineFont := TFTFont.Create(Filename, Size, Outset, LoadFlags);

+

+  ResetIntern();

+end;

+

+destructor TFTOutlineFont.Destroy;

+begin

+  fOutlineFont.Free;

+  fInnerFont.Free;

+  inherited;

+end;

+

+procedure TFTOutlineFont.ResetIntern();

+begin

+  // TODO: maybe swap fInnerFont/fOutlineFont.GlyphSpacing to use the spacing

+  // of the outline font?

+  //fInnerFont.GlyphSpacing := fOutset*2;

+  fOutlineFont.GlyphSpacing := -fOutset*2;

+

+  fLineSpacing := fOutlineFont.LineSpacing;

+  fReflectionSpacing := fOutlineFont.ReflectionSpacing;

+  fOutlineColor := NewGLColor(0, 0, 0, 1);

+end;

+

+procedure TFTOutlineFont.Reset();

+begin

+  inherited;

+  fInnerFont.Reset();

+  fOutlineFont.Reset();

+  ResetIntern();

+end;

+

+procedure TFTOutlineFont.DrawUnderline(const Text: WideString);

+begin

+  glPushAttrib(GL_CURRENT_BIT);

+  glColor4fv(@fOutlineColor.vals);

+  fOutlineFont.DrawUnderline(Text);

+  glPopAttrib();

+

+  glPushMatrix();

+  glTranslatef(fOutset, 0, 0);

+  fInnerFont.DrawUnderline(Text);

+  glPopMatrix();

+end;

+

+procedure TFTOutlineFont.Render(const Text: WideString);

+begin

+  { setup and render outline font }

+

+  // save old color

+  glPushAttrib(GL_CURRENT_BIT);

+  glColor4fv(@fOutlineColor.vals);

+  glPushMatrix();

+  fOutlineFont.Render(Text);

+  glPopMatrix();

+  glPopAttrib();

+

+  { setup and render inner font }

+

+  glPushMatrix();

+  glTranslatef(fOutset, fOutset, 0);

+  fInnerFont.Render(Text);

+  glPopMatrix();

+end;

+

+procedure TFTOutlineFont.SetOutlineColor(r, g, b: GLfloat; a: GLfloat);

+begin

+  fOutlineColor := NewGLColor(r, g, b, a);

+end;

+

+procedure TFTOutlineFont.FlushCache(KeepBaseSet: boolean);

+begin

+  fOutlineFont.FlushCache(KeepBaseSet);

+  fInnerFont.FlushCache(KeepBaseSet);

+end;

+

+function TFTOutlineFont.BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl;

+begin

+  Result := fOutlineFont.BBox(Text, Advance);

+end;

+

+function TFTOutlineFont.GetHeight(): single;

+begin

+  Result := fOutlineFont.Height;

+end;

+

+function TFTOutlineFont.GetAscender(): single;

+begin

+  Result := fOutlineFont.Ascender;

+end;

+

+function TFTOutlineFont.GetDescender(): single;

+begin

+  Result := fOutlineFont.Descender;

+end;

+

+procedure TFTOutlineFont.SetLineSpacing(Spacing: single);

+begin

+  inherited SetLineSpacing(Spacing);

+  fInnerFont.LineSpacing := Spacing;

+  fOutlineFont.LineSpacing := Spacing;

+end;

+

+procedure TFTOutlineFont.SetGlyphSpacing(Spacing: single);

+begin

+  inherited SetGlyphSpacing(Spacing);

+  fInnerFont.GlyphSpacing := Spacing;

+  fOutlineFont.GlyphSpacing := Spacing - Outset*2;

+end;

+

+procedure TFTOutlineFont.SetReflectionSpacing(Spacing: single);

+begin

+  inherited SetReflectionSpacing(Spacing);

+  fInnerFont.ReflectionSpacing := Spacing;

+  fOutlineFont.ReflectionSpacing := Spacing;

+end;

+

+procedure TFTOutlineFont.SetStyle(Style: TFontStyle);

+begin

+  inherited SetStyle(Style);

+  fInnerFont.Style := Style;

+  fOutlineFont.Style := Style;

+end;

+

+function TFTOutlineFont.GetStyle(): TFontStyle;

+begin

+  Result := inherited GetStyle();

+end;

+

+function TFTOutlineFont.GetUnderlinePosition(): single;

+begin

+  Result := fOutlineFont.GetUnderlinePosition();

+end;

+

+function TFTOutlineFont.GetUnderlineThickness(): single;

+begin

+  Result := fOutlineFont.GetUnderlinePosition();

+end;

+

+procedure TFTOutlineFont.SetUseKerning(Enable: boolean);

+begin

+  inherited SetUseKerning(Enable);

+  fInnerFont.fUseKerning := Enable;

+  fOutlineFont.fUseKerning := Enable;

+end;

+

+procedure TFTOutlineFont.SetReflectionPass(Enable: boolean);

+begin

+  inherited SetReflectionPass(Enable);

+  fInnerFont.fReflectionPass := Enable;

+  fOutlineFont.fReflectionPass := Enable;

+end;

+

+{**

+ * TScalableOutlineFont

+ *}

+

+constructor TFTScalableOutlineFont.Create(

+    const Filename: string;

+    Size: integer; OutsetAmount: single;

+    UseMipmaps: boolean);

+var

+  LoadFlags: FT_Int32;

+begin

+  LoadFlags := FT_LOAD_DEFAULT;

+  // Disable hinting and grid-fitting (see TFTScalableFont.Create)

+  if (UseMipmaps) then

+    LoadFlags := LoadFlags or FT_LOAD_NO_HINTING;

+  inherited Create(

+      TFTOutlineFont.Create(Filename, Size, Size*OutsetAmount, LoadFlags),

+      UseMipmaps);

+end;

+

+function TFTScalableOutlineFont.CreateMipmap(Level: integer; Scale: single): TFont;

+var

+  ScaledSize: integer;

+  BaseFont: TFTOutlineFont;

+begin

+  Result := nil;

+  BaseFont := TFTOutlineFont(fBaseFont);

+  ScaledSize := Round(BaseFont.Size*Scale);

+  // do not create mipmap fonts < 8 pixels

+  if (ScaledSize < 8) then

+    Exit;

+  Result := TFTOutlineFont.Create(BaseFont.fFilename,

+      ScaledSize, BaseFont.fOutset*Scale,

+      FT_LOAD_DEFAULT or FT_LOAD_NO_HINTING);

+end;

+

+function TFTScalableOutlineFont.GetOutset(): single;

+begin

+  Result := TFTOutlineFont(fBaseFont).Outset * fScale;

+end;

+

+procedure TFTScalableOutlineFont.SetOutlineColor(r, g, b: GLfloat; a: GLfloat);

+var

+  Level: integer;

+begin

+  for Level := 0 to High(fMipmapFonts) do

+    if (fMipmapFonts[Level] <> nil) then

+      TFTOutlineFont(fMipmapFonts[Level]).SetOutlineColor(r, g, b, a);

+end;

+

+procedure TFTScalableOutlineFont.FlushCache(KeepBaseSet: boolean);

+var

+  Level: integer;

+begin

+  for Level := 0 to High(fMipmapFonts) do

+    if (fMipmapFonts[Level] <> nil) then

+      TFTOutlineFont(fMipmapFonts[Level]).FlushCache(KeepBaseSet);

+end;

+

+

+{*

+ * TFTGlyph

+ *}

+

+const

+  {**

+   * Size of the transparent border surrounding the glyph image in the texture.

+   * The border is necessary because OpenGL does not smooth texels at the

+   * border of a texture with the GL_CLAMP or GL_CLAMP_TO_EDGE styles.

+   * Without the border, magnified glyph textures look very ugly at their edges.

+   * It looks edgy, as if some pixels are missing especially on the left edge

+   * (just set cTexSmoothBorder to 0 to see what is meant by this).

+   * With the border even the glyphs edges are blended to the border (transparent)

+   * color and everything looks nice.

+   *

+   * Note:

+   * OpenGL already supports texture border by setting the border parameter

+   * of glTexImage*D() to 1 and using a texture size of 2^m+2b and setting the

+   * border pixels to the border color. In some forums it is discouraged to use

+   * the border parameter as only a few of the more modern graphics cards support

+   * this feature. On an ATI Radeon 9700 card, the slowed down to 0.5 fps and

+   * the glyph's background got black.  So instead of using this feature we

+   * handle it on our own. The only drawback is that textures might get bigger

+   * because the border might require a higher power of 2 size instead of just

+   * two additional pixels.

+   *}

+  cTexSmoothBorder = 1;

+

+procedure TFTGlyph.Extrude(var TexBuffer: TGLubyteDynArray; Outset: single);

+

+  procedure SetToMax(var Val1: GLubyte; Val2: GLubyte); {$IFDEF HasInline}inline;{$ENDIF}

+  begin

+    if (Val1 < Val2) then

+      Val1 := Val2;

+  end;

+

+var

+  I, X, Y: integer;

+  SrcBuffer,TmpBuffer: TGLubyteDynArray;

+  TexLine, TexLinePrev, TexLineNext: PGLubyteArray;

+  SrcLine: PGLubyteArray;

+  AlphaScale: single;

+  Value, ValueNeigh, ValueDiag: GLubyte;

+const

+  // square-root of 2 used for diagonal neighbor pixels

+  cSqrt2 = 1.4142;

+  // number of ignored pixels on each edge of the bitmap. Consists of:

+  // - border used for font smoothing and

+  // - outer (extruded) bitmap pixel (because it is just written but never read)

+  cBorder = cTexSmoothBorder + 1;

+begin

+  // allocate memory for temporary buffer

+  SetLength(SrcBuffer, Length(TexBuffer));

+  FillChar(SrcBuffer[0], Length(TexBuffer), 0);

+

+  // extrude pixel by pixel

+  for I := 1 to Ceil(Outset) do

+  begin

+    // swap arrays

+    TmpBuffer := TexBuffer;

+    TexBuffer := SrcBuffer;

+    SrcBuffer := TmpBuffer;

+

+    // as long as we add an entire pixel of outset, use a solid color.

+    // If the fractional part is reached blend, e.g. outline=3.2 -> 3 solid

+    // pixels and one blended with alpha=0.2.

+    // For the fractional part I = Ceil(Outset) is always true.

+    if (I <= Outset) then

+      AlphaScale := 1

+    else

+      AlphaScale := Outset - Trunc(Outset);

+

+    // copy data to the expanded bitmap.

+    for Y := cBorder to fTexSize.Height - 2*cBorder do

+    begin

+      TexLine     := @TexBuffer[Y*fTexSize.Width];

+      TexLinePrev := @TexBuffer[(Y-1)*fTexSize.Width];

+      TexLineNext := @TexBuffer[(Y+1)*fTexSize.Width];

+      SrcLine     := @SrcBuffer[Y*fTexSize.Width];

+

+      // expand current line's pixels

+      for X := cBorder to fTexSize.Width - 2*cBorder do

+      begin

+        Value := SrcLine[X];

+        ValueNeigh := Round(Value * AlphaScale);

+        ValueDiag := Round(ValueNeigh / cSqrt2);

+

+        SetToMax(TexLine[X],   Value);

+        SetToMax(TexLine[X-1], ValueNeigh);

+        SetToMax(TexLine[X+1], ValueNeigh);

+

+        SetToMax(TexLinePrev[X],   ValueNeigh);

+        SetToMax(TexLinePrev[X-1], ValueDiag);

+        SetToMax(TexLinePrev[X+1], ValueDiag);

+

+        SetToMax(TexLineNext[X],   ValueNeigh);

+        SetToMax(TexLineNext[X-1], ValueDiag);

+        SetToMax(TexLineNext[X+1], ValueDiag);

+      end;

+    end;

+  end;

+

+  TmpBuffer := nil;

+  SetLength(SrcBuffer, 0);

+end;

+

+procedure TFTGlyph.CreateTexture(LoadFlags: FT_Int32);

+var

+  X, Y:          integer;

+  Glyph:         FT_Glyph;

+  BitmapGlyph:   FT_BitmapGlyph;

+  Bitmap:        PFT_Bitmap;

+  BitmapLine:    PChar;

+  BitmapBuffer:  PChar;

+  TexBuffer:     TGLubyteDynArray;

+  TexLine:       PGLubyteArray;

+  CBox:          FT_BBox;

+begin

+  // load the Glyph for our character

+  if (FT_Load_Glyph(fFont.Face, fCharIndex, LoadFlags) <> 0) then

+    raise Exception.Create('FT_Load_Glyph failed');

+

+  // move the face's glyph into a Glyph object

+  if (FT_Get_Glyph(fFont.Face^.glyph, Glyph) <> 0) then

+    raise Exception.Create('FT_Get_Glyph failed');

+

+  // store scaled advance width/height in glyph-object

+  fAdvance.X := fFont.Face^.glyph^.advance.x / 64 + fOutset*2;

+  fAdvance.Y := fFont.Face^.glyph^.advance.y / 64 + fOutset*2;

+

+  // get the contour's bounding box (in 1/64th pixels, not font-units)

+  FT_Glyph_Get_CBox(Glyph, FT_GLYPH_BBOX_UNSCALED, CBox);

+  // convert 1/64th values to double values

+  fBounds.Left   := CBox.xMin / 64;

+  fBounds.Right  := CBox.xMax / 64 + fOutset*2;

+  fBounds.Bottom := CBox.yMin / 64;

+  fBounds.Top    := CBox.yMax / 64 + fOutset*2;

+

+  // convert the glyph to a bitmap (and destroy original glyph image)

+  FT_Glyph_To_Bitmap(Glyph, ft_render_mode_normal, nil, 1);

+  BitmapGlyph := FT_BitmapGlyph(Glyph);

+

+  // get bitmap offsets

+  fBitmapCoords.Left := BitmapGlyph^.left - cTexSmoothBorder;

+  // Note: add 1*fOutset for lifting the baseline so outset fonts to not intersect

+  // with the baseline; Ceil(fOutset) for the outset pixels added to the bitmap.

+  fBitmapCoords.Top  := BitmapGlyph^.top + fOutset+Ceil(fOutset) + cTexSmoothBorder;

+

+  // make accessing the bitmap easier

+  Bitmap := @BitmapGlyph^.bitmap;

+  // get bitmap dimensions

+  fBitmapCoords.Width  := Bitmap.width + (Ceil(fOutset) + cTexSmoothBorder)*2;

+  fBitmapCoords.Height := Bitmap.rows + (Ceil(fOutset) + cTexSmoothBorder)*2;

+

+  // get power-of-2 bitmap widths

+  fTexSize.Width  :=

+      NextPowerOf2(Bitmap.width + (Ceil(fOutset) + cTexSmoothBorder)*2);

+  fTexSize.Height :=

+      NextPowerOf2(Bitmap.rows + (Ceil(fOutset) + cTexSmoothBorder)*2);

+

+  // texture-widths ignoring empty (power-of-2) padding space

+  fTexOffset.X := fBitmapCoords.Width / fTexSize.Width;

+  fTexOffset.Y := fBitmapCoords.Height / fTexSize.Height;

+

+  // allocate memory for texture data

+  SetLength(TexBuffer, fTexSize.Width * fTexSize.Height);

+  FillChar(TexBuffer[0], Length(TexBuffer), 0);

+

+  // Freetype stores the bitmap with either upper (pitch is > 0) or lower

+  // (pitch < 0) glyphs line first. Set the buffer to the upper line.

+  // See http://freetype.sourceforge.net/freetype2/docs/glyphs/glyphs-7.html

+  if (Bitmap.pitch > 0) then

+    BitmapBuffer := @Bitmap.buffer[0]

+  else

+    BitmapBuffer := @Bitmap.buffer[(Bitmap.rows-1) * Abs(Bitmap.pitch)];

+

+  // copy data to texture bitmap (upper line first).

+  for Y := 0 to Bitmap.rows-1 do

+  begin

+    // set pointer to first pixel in line that holds bitmap data.

+    // Each line starts with a cTexSmoothBorder pixel and multiple outset pixels

+    // that are added by Extrude() later.

+    TexLine := @TexBuffer[(Y + cTexSmoothBorder + Ceil(fOutset)) * fTexSize.Width +

+                          cTexSmoothBorder + Ceil(fOutset)];

+    // get next lower line offset, use pitch instead of width as it tells

+    // us the storage direction of the lines. In addition a line might be padded.

+    BitmapLine := @BitmapBuffer[Y * Bitmap.pitch];

+    for X := 0 to Bitmap.width-1 do

+      TexLine[X] := GLubyte(BitmapLine[X]);

+  end;

+

+  if (fOutset > 0) then

+    Extrude(TexBuffer, fOutset);

+

+  // allocate resources for textures and display lists

+  glGenTextures(1, @fTexture);

+

+  // setup texture paramaters

+  glBindTexture(GL_TEXTURE_2D, fTexture);

+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

+

+  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

+  // create alpha-map (GL_ALPHA component only).

+  // TexCoord (0,0) corresponds to the top left pixel of the glyph,

+  // (1,1) to the bottom right pixel. So the glyph is flipped as OpenGL uses

+  // a cartesian (y-axis up) coordinate system for textures.   

+  // See the cTexSmoothBorder comment for info on texture borders.

+  glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, fTexSize.Width, fTexSize.Height,

+      0, GL_ALPHA, GL_UNSIGNED_BYTE, @TexBuffer[0]);

+

+  // free expanded data

+  SetLength(TexBuffer, 0);

+

+  // create the display list

+  fDisplayList := glGenLists(1);

+

+  // render to display-list

+  glNewList(fDisplayList, GL_COMPILE);

+    Render(false);

+  glEndList();

+

+  // free glyph data (bitmap, etc.)

+  FT_Done_Glyph(Glyph);

+end;

+

+constructor TFTGlyph.Create(Font: TFTFont; ch: WideChar; Outset: single;

+    LoadFlags: FT_Int32);

+begin

+  inherited Create();

+

+  fFont := Font;

+  fOutset := Outset;

+

+  // get the Freetype char-index (use default UNICODE charmap)

+  fCharIndex := FT_Get_Char_Index(Font.fFace, FT_ULONG(ch));

+

+  CreateTexture(LoadFlags);

+end;

+

+destructor TFTGlyph.Destroy;

+begin

+  if (fDisplayList <> 0) then

+    glDeleteLists(fDisplayList, 1);

+  if (fTexture <> 0) then

+    glDeleteTextures(1, @fTexture);

+  inherited;

+end;

+

+procedure TFTGlyph.Render(UseDisplayLists: boolean);

+begin

+  // use display-lists if enabled and exit

+  if (UseDisplayLists) then

+  begin

+    glCallList(fDisplayList);

+    Exit;

+  end;

+

+  glBindTexture(GL_TEXTURE_2D, fTexture);

+  glPushMatrix();

+

+  // move to top left glyph position

+  glTranslatef(fBitmapCoords.Left, fBitmapCoords.Top, 0);

+

+  // draw glyph texture

+  glBegin(GL_QUADS);

+    // top right

+    glTexCoord2f(fTexOffset.X, 0);

+    glVertex2f(fBitmapCoords.Width, 0);

+

+    // top left

+    glTexCoord2f(0, 0);

+    glVertex2f(0, 0);

+

+    // bottom left

+    glTexCoord2f(0, fTexOffset.Y);

+    glVertex2f(0, -fBitmapCoords.Height);

+

+    // bottom right

+    glTexCoord2f(fTexOffset.X, fTexOffset.Y);

+    glVertex2f(fBitmapCoords.Width, -fBitmapCoords.Height);

+  glEnd();

+

+  glPopMatrix();

+end;

+

+procedure TFTGlyph.RenderReflection();

+var

+  Color: TGLColor;

+  TexUpperPos: single;

+  TexLowerPos: single;

+  UpperPos: single;

+const

+  CutOff = 0.6;

+begin

+  glPushMatrix();

+  glBindTexture(GL_TEXTURE_2D, fTexture);

+  glGetFloatv(GL_CURRENT_COLOR, @Color.vals);

+

+  // add extra space to the left of the glyph

+  glTranslatef(fBitmapCoords.Left, 0, 0);

+

+  // The upper position of the glyph, if CutOff is 1.0, it is fFont.Ascender.

+  // If CutOff is set to 0.5 only half of the glyph height is displayed.

+  UpperPos := fFont.Descender + fFont.Height * CutOff;

+

+  // the glyph texture's height is just the height of the glyph but not the font

+  // height. Setting a color for the upper and lower bounds of the glyph results

+  // in different color gradients. So we have to set the color values for the

+  // descender and ascender (as we have a cutoff, for the upper-pos here) as

+  // these positions are font but not glyph specific.

+

+  // To get the texture positions we have to enhance the texture at the top and

+  // bottom by the amount from the top to ascender (rather upper-pos here) and

+  // from the bottom (Height-Top) to descender. Then we have to convert those

+  // heights to texture coordinates by dividing by the bitmap Height and

+  // removing the power-of-2 padding space by multiplying with fTexOffset.Y

+  // (as fBitmapCoords.Height corresponds to fTexOffset.Y and not 1.0).

+  TexUpperPos  := -(UpperPos - fBitmapCoords.Top) / fBitmapCoords.Height * fTexOffset.Y;

+  TexLowerPos := (-(fFont.Descender + fBitmapCoords.Height - fBitmapCoords.Top) /

+                    fBitmapCoords.Height + 1) * fTexOffset.Y;

+

+  // draw glyph texture

+  glBegin(GL_QUADS);

+    // top right

+    glColor4f(Color.r, Color.g, Color.b, 0);

+    glTexCoord2f(fTexOffset.X, TexUpperPos);

+    glVertex2f(fBitmapCoords.Width, UpperPos);

+

+    // top left

+    glTexCoord2f(0, TexUpperPos);

+    glVertex2f(0, UpperPos);

+

+    // bottom left

+    glColor4f(Color.r, Color.g, Color.b, Color.a-0.3);

+    glTexCoord2f(0, TexLowerPos);

+    glVertex2f(0, fFont.Descender);

+

+    // bottom right

+    glTexCoord2f(fTexOffset.X, TexLowerPos);

+    glVertex2f(fBitmapCoords.Width, fFont.Descender);

+  glEnd();

+

+  glPopMatrix();

+

+  // restore old color

+  // Note: glPopAttrib(GL_CURRENT_BIT)/glPopAttrib() is much slower then

+  // glGetFloatv(GL_CURRENT_COLOR, ...)/glColor4fv(...)

+  glColor4fv(@Color.vals);

+end;

+

+function TFTGlyph.GetAdvance(): TPositionDbl;

+begin

+  Result := fAdvance;

+end;

+

+function TFTGlyph.GetBounds(): TBoundsDbl;

+begin

+  Result := fBounds;

+end;

+

+

+{*

+ * TGlyphCache

+ *}

+

+constructor TGlyphCache.Create();

+begin

+  inherited;

+  fHash := TList.Create();

+end;

+

+destructor TGlyphCache.Destroy();

+begin

+  // free cached glyphs

+  FlushCache(false);

+

+  // destroy TList

+  fHash.Free;

+  

+  inherited;

+end;

+

+function TGlyphCache.FindGlyphTable(BaseCode: cardinal; out InsertPos: integer): PGlyphTable;

+var

+  I: integer;

+  Entry: TGlyphCacheHashEntry;

+begin

+  Result := nil;

+

+  for I := 0 to fHash.Count-1 do

+  begin

+    Entry := TGlyphCacheHashEntry(fHash[I]);

+

+    if (Entry.BaseCode > BaseCode) then

+    begin

+      InsertPos := I;

+      Exit;

+    end;

+

+    if (Entry.BaseCode = BaseCode) then

+    begin

+      InsertPos := I;

+      Result := @Entry.GlyphTable;

+      Exit;

+    end;

+  end;

+

+  InsertPos := fHash.Count;

+end;

+

+function TGlyphCache.AddGlyph(ch: WideChar; const Glyph: TGlyph): boolean;

+var

+  BaseCode:  cardinal;

+  GlyphCode: integer;

+  InsertPos: integer;

+  GlyphTable: PGlyphTable;

+  Entry: TGlyphCacheHashEntry;

+begin

+  Result := false;

+

+  BaseCode := cardinal(ch) shr 8;

+  GlyphTable := FindGlyphTable(BaseCode, InsertPos);

+  if (GlyphTable = nil) then

+  begin

+    Entry := TGlyphCacheHashEntry.Create(BaseCode);

+    GlyphTable := @Entry.GlyphTable;

+    fHash.Insert(InsertPos, Entry);

+  end;

+

+  // get glyph table offset

+  GlyphCode := cardinal(ch) and $FF;

+  // insert glyph into table if not present

+  if (GlyphTable[GlyphCode] = nil) then

+  begin

+    GlyphTable[GlyphCode] := Glyph;

+    Result := true;

+  end;

+end;

+

+procedure TGlyphCache.DeleteGlyph(ch: WideChar);

+var

+  Table: PGlyphTable;

+  TableIndex, GlyphIndex: integer;

+  TableEmpty: boolean;

+begin

+  // find table

+  Table := FindGlyphTable(cardinal(ch) shr 8, TableIndex);

+  if (Table = nil) then

+    Exit;

+

+  // find glyph    

+  GlyphIndex := cardinal(ch) and $FF;

+  if (Table[GlyphIndex] <> nil) then

+  begin

+    // destroy glyph

+    FreeAndNil(Table[GlyphIndex]);

+

+    // check if table is empty

+    TableEmpty := true;

+    for GlyphIndex := 0 to High(Table^) do

+    begin

+      if (Table[GlyphIndex] <> nil) then

+      begin

+        TableEmpty := false;

+        Break;

+      end;

+    end;

+

+    // free empty table

+    if (TableEmpty) then

+    begin

+      fHash.Delete(TableIndex);

+    end;

+  end;

+end;

+

+function TGlyphCache.GetGlyph(ch: WideChar): TGlyph;

+var

+  InsertPos: integer;

+  Table: PGlyphTable;

+begin

+  Table := FindGlyphTable(cardinal(ch) shr 8, InsertPos);

+  if (Table = nil) then

+    Result := nil

+  else

+    Result := Table[cardinal(ch) and $FF];

+end;

+

+function TGlyphCache.HasGlyph(ch: WideChar): boolean;

+begin

+  Result := (GetGlyph(ch) <> nil);

+end;

+

+procedure TGlyphCache.FlushCache(KeepBaseSet: boolean);

+var

+  EntryIndex, TableIndex: integer;

+  Entry: TGlyphCacheHashEntry;

+begin

+  // destroy cached glyphs

+  for EntryIndex := 0 to fHash.Count-1 do

+  begin

+    Entry := TGlyphCacheHashEntry(fHash[EntryIndex]);

+

+    // the base set (0-255) has BaseCode 0 as the upper bytes are 0.

+    if KeepBaseSet and (Entry.fBaseCode = 0) then

+      Continue;

+

+    for TableIndex := 0 to High(Entry.GlyphTable) do

+    begin

+      if (Entry.GlyphTable[TableIndex] <> nil) then

+        FreeAndNil(Entry.GlyphTable[TableIndex]);

+    end;

+    FreeAndNil(Entry);

+  end;

+end;

+

+

+{*

+ * TGlyphCacheEntry

+ *}

+

+constructor TGlyphCacheHashEntry.Create(BaseCode: cardinal);

+begin

+  inherited Create();

+  fBaseCode := BaseCode;

+end;

+

+

+{*

+ * TFreeType

+ *}

+

+class function TFreeType.GetLibrary(): FT_Library;

+begin

+  if (LibraryInst = nil) then

+  begin

+    // initialize freetype

+    if (FT_Init_FreeType(LibraryInst) <> 0) then

+      raise Exception.Create('FT_Init_FreeType failed');

+  end;

+  Result := LibraryInst;

+end;

+

+class procedure TFreeType.FreeLibrary();

+begin

+  if (LibraryInst <> nil) then

+    FT_Done_FreeType(LibraryInst);

+  LibraryInst := nil;

+end;

+

+

+{$IFDEF BITMAP_FONT}

+{*

+ * TBitmapFont

+ *}

+

+constructor TBitmapFont.Create(const Filename: string; Outline: integer;

+    Baseline, Ascender, Descender: integer);

+begin

+  inherited Create();

+

+  fTex := Texture.LoadTexture(true, Filename, TEXTURE_TYPE_TRANSPARENT, 0);

+  fTexSize := 1024;

+  fOutline := Outline;

+  fBaseline  := Baseline;

+  fAscender  := Ascender;

+  fDescender := Descender;

+

+  LoadFontInfo(ChangeFileExt(Filename, '.dat'));

+

+  ResetIntern();

+end;

+

+destructor TBitmapFont.Destroy();

+begin

+  glDeleteTextures(1, @fTex.TexNum);

+  inherited;

+end;

+

+procedure TBitmapFont.ResetIntern();

+begin

+  fLineSpacing := Height;

+end;

+

+procedure TBitmapFont.Reset();

+begin

+  inherited;

+  ResetIntern();

+end;

+

+procedure TBitmapFont.CorrectWidths(WidthMult: real; WidthAdd: integer);

+var

+  Count: integer;

+begin

+  for Count := 0 to 255 do

+    fWidths[Count] := Round(fWidths[Count] * WidthMult) + WidthAdd;

+end;

+

+procedure TBitmapFont.LoadFontInfo(const InfoFile: string);

+var

+  Stream:  TFileStream;

+begin

+  FillChar(fWidths[0], Length(fWidths), 0);

+

+  Stream := nil;

+  try

+    Stream := TFileStream.Create(InfoFile, fmOpenRead);

+    Stream.Read(fWidths, 256);

+  except

+    raise Exception.Create('Could not read font info file ''' +  InfoFile + '''');

+  end;

+  Stream.Free;

+end;

+

+function TBitmapFont.BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl;

+var

+  LineIndex, CharIndex: integer;

+  CharCode: cardinal;

+  Line: WideString;

+  LineWidth: double;

+begin

+  Result.Left := 0;

+  Result.Right := 0;

+  Result.Top := Height;

+  Result.Bottom := 0;

+

+  for LineIndex := 0 to High(Text) do

+  begin

+    Line := Text[LineIndex];

+    LineWidth := 0;

+    for CharIndex := 1 to Length(Line) do

+    begin

+      CharCode := Ord(Line[CharIndex]);

+      if (CharCode < Length(fWidths)) then

+        LineWidth := LineWidth + fWidths[CharCode];

+    end;

+    if (LineWidth > Result.Right) then

+      Result.Right := LineWidth;

+  end;

+end;

+

+procedure TBitmapFont.RenderChar(ch: WideChar; var AdvanceX: real);

+var

+  TexX, TexY:        real;

+  TexR, TexB:        real;

+  GlyphWidth:        real;

+  PL, PT:            real;

+  PR, PB:            real;

+  CharCode:          cardinal;

+begin

+  CharCode := Ord(ch);

+  if (CharCode > High(fWidths)) then

+    CharCode := 0;

+

+  GlyphWidth := fWidths[CharCode];

+

+  // set texture positions

+  TexX := (CharCode mod 16) * 1/16 + 1/32 - (GlyphWidth/2 - fOutline)/fTexSize;

+  TexY := (CharCode div 16) * 1/16 + {2 texels} 2/fTexSize;

+  TexR := (CharCode mod 16) * 1/16 + 1/32 + (GlyphWidth/2 + fOutline)/fTexSize;

+  TexB := (1 + CharCode div 16) * 1/16 - {2 texels} 2/fTexSize;

+

+  // set vector positions

+  PL := AdvanceX - fOutline;

+  PR := PL + GlyphWidth + fOutline*2;

+  PB := -fBaseline;

+  PT := PB + fTexSize div 16;

+

+  (*

+  if (Font.Blend) then

+  begin

+    glEnable(GL_BLEND);

+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

+  end;

+  *)

+

+  glEnable(GL_TEXTURE_2D);

+  glBindTexture(GL_TEXTURE_2D, fTex.TexNum);

+  

+  if (not ReflectionPass) then

+  begin

+    glBegin(GL_QUADS);

+      glTexCoord2f(TexX, TexY); glVertex2f(PL, PT);

+      glTexCoord2f(TexX, TexB); glVertex2f(PL, PB);

+      glTexCoord2f(TexR, TexB); glVertex2f(PR, PB);

+      glTexCoord2f(TexR, TexY); glVertex2f(PR, PT);

+    glEnd;

+  end

+  else

+  begin

+    glDepthRange(0, 10);

+    glDepthFunc(GL_LEQUAL);

+    glEnable(GL_DEPTH_TEST);

+

+    glBegin(GL_QUADS);

+      glTexCoord2f(TexX, TexY); glVertex2f(PL, PT);

+      glTexCoord2f(TexX, TexB); glVertex2f(PL, PB);

+      glTexCoord2f(TexR, TexB); glVertex2f(PR, PB);

+      glTexCoord2f(TexR, TexY); glVertex2f(PR, PT);

+    glEnd;

+

+    glBegin(GL_QUADS);

+      glTexCoord2f(TexX, TexY); glVertex2f(PL, PT);

+      glTexCoord2f(TexX, TexB); glVertex2f(PL, PB);

+      glTexCoord2f(TexR, TexB); glVertex2f(PR, PB);

+      glTexCoord2f(TexR, TexY); glVertex2f(PR, PT);

+

+(*

+      glColor4f(fTempColor.r, fTempColor.g, fTempColor.b, 0.7);

+      glTexCoord2f(TexX, TexB); glVertex3f(PL, PB, 0);

+      glTexCoord2f(TexR, TexB); glVertex3f(PR, PB, 0);

+

+      glColor4f(fTempColor.r, fTempColor.g, fTempColor.b, 0);

+      glTexCoord2f(TexR, (TexY + TexB)/2); glVertex3f(PR, (PT + PB)/2, 0);

+      glTexCoord2f(TexX, (TexY + TexB)/2); glVertex3f(PL, (PT + PB)/2, 0);

+*)

+    glEnd;

+

+    //write the colour back

+    glColor4fv(@fTempColor);

+

+    glDisable(GL_DEPTH_TEST);

+  end; // reflection

+

+  glDisable(GL_TEXTURE_2D);

+  (*

+  if (Font.Blend) then

+    glDisable(GL_BLEND);

+  *)

+

+  AdvanceX := AdvanceX + GlyphWidth;

+end;

+

+procedure TBitmapFont.Render(const Text: WideString);

+var

+  CharIndex: integer;

+  AdvanceX: real;

+begin

+  // if there is no text do nothing

+  if (Text = '') then

+    Exit;

+

+  //Save the current color and alpha (for reflection)

+  glGetFloatv(GL_CURRENT_COLOR, @fTempColor);

+

+  AdvanceX := 0;

+  for CharIndex := 1 to Length(Text) do

+  begin

+    RenderChar(Text[CharIndex], AdvanceX);

+  end;

+end;

+

+function TBitmapFont.GetHeight(): single;

+begin

+  Result := fAscender - fDescender;

+end;

+

+function TBitmapFont.GetAscender(): single;

+begin

+  Result := fAscender;

+end;

+

+function TBitmapFont.GetDescender(): single;

+begin

+  Result := fDescender;

+end;

+

+function TBitmapFont.GetUnderlinePosition(): single;

+begin

+  Result := -2.0;

+end;

+

+function TBitmapFont.GetUnderlineThickness(): single;

+begin

+  Result := 1.0;

+end;

+

+{$ENDIF BITMAP_FONT}

+

+

+initialization

+

+finalization

+  TFreeType.FreeLibrary();

+

+end.

diff --git a/src/lib/freetype/demo/lesson43.bdsproj b/src/lib/freetype/demo/lesson43.bdsproj
new file mode 100644
index 00000000..30f88ab3
--- /dev/null
+++ b/src/lib/freetype/demo/lesson43.bdsproj
@@ -0,0 +1,175 @@
+<?xml version="1.0" encoding="utf-8"?>

+<BorlandProject>

+	<PersonalityInfo>

+		<Option>

+			<Option Name="Personality">Delphi.Personality</Option>

+			<Option Name="ProjectType">VCLApplication</Option>

+			<Option Name="Version">1.0</Option>

+			<Option Name="GUID">{41656F26-D552-4948-B9DB-E184B77C3993}</Option>

+		</Option>

+	</PersonalityInfo>

+	<Delphi.Personality>

+		<Source>

+			<Source Name="MainSource">lesson43.dpr</Source>

+		</Source>

+		<FileVersion>

+			<FileVersion Name="Version">7.0</FileVersion>

+		</FileVersion>

+		<Compiler>

+			<Compiler Name="A">8</Compiler>

+			<Compiler Name="B">0</Compiler>

+			<Compiler Name="C">1</Compiler>

+			<Compiler Name="D">1</Compiler>

+			<Compiler Name="E">0</Compiler>

+			<Compiler Name="F">0</Compiler>

+			<Compiler Name="G">1</Compiler>

+			<Compiler Name="H">1</Compiler>

+			<Compiler Name="I">1</Compiler>

+			<Compiler Name="J">0</Compiler>

+			<Compiler Name="K">0</Compiler>

+			<Compiler Name="L">1</Compiler>

+			<Compiler Name="M">0</Compiler>

+			<Compiler Name="N">1</Compiler>

+			<Compiler Name="O">0</Compiler>

+			<Compiler Name="P">1</Compiler>

+			<Compiler Name="Q">0</Compiler>

+			<Compiler Name="R">0</Compiler>

+			<Compiler Name="S">0</Compiler>

+			<Compiler Name="T">0</Compiler>

+			<Compiler Name="U">0</Compiler>

+			<Compiler Name="V">1</Compiler>

+			<Compiler Name="W">0</Compiler>

+			<Compiler Name="X">1</Compiler>

+			<Compiler Name="Y">1</Compiler>

+			<Compiler Name="Z">1</Compiler>

+			<Compiler Name="ShowHints">True</Compiler>

+			<Compiler Name="ShowWarnings">True</Compiler>

+			<Compiler Name="UnitAliases">WinTypes=Windows;WinProcs=Windows;DbiTypes=BDE;DbiProcs=BDE;DbiErrs=BDE;</Compiler>

+			<Compiler Name="NamespacePrefix"></Compiler>

+			<Compiler Name="GenerateDocumentation">False</Compiler>

+			<Compiler Name="DefaultNamespace"></Compiler>

+			<Compiler Name="SymbolDeprecated">True</Compiler>

+			<Compiler Name="SymbolLibrary">True</Compiler>

+			<Compiler Name="SymbolPlatform">True</Compiler>

+			<Compiler Name="SymbolExperimental">True</Compiler>

+			<Compiler Name="UnitLibrary">True</Compiler>

+			<Compiler Name="UnitPlatform">True</Compiler>

+			<Compiler Name="UnitDeprecated">True</Compiler>

+			<Compiler Name="UnitExperimental">True</Compiler>

+			<Compiler Name="HResultCompat">True</Compiler>

+			<Compiler Name="HidingMember">True</Compiler>

+			<Compiler Name="HiddenVirtual">True</Compiler>

+			<Compiler Name="Garbage">True</Compiler>

+			<Compiler Name="BoundsError">True</Compiler>

+			<Compiler Name="ZeroNilCompat">True</Compiler>

+			<Compiler Name="StringConstTruncated">True</Compiler>

+			<Compiler Name="ForLoopVarVarPar">True</Compiler>

+			<Compiler Name="TypedConstVarPar">True</Compiler>

+			<Compiler Name="AsgToTypedConst">True</Compiler>

+			<Compiler Name="CaseLabelRange">True</Compiler>

+			<Compiler Name="ForVariable">True</Compiler>

+			<Compiler Name="ConstructingAbstract">True</Compiler>

+			<Compiler Name="ComparisonFalse">True</Compiler>

+			<Compiler Name="ComparisonTrue">True</Compiler>

+			<Compiler Name="ComparingSignedUnsigned">True</Compiler>

+			<Compiler Name="CombiningSignedUnsigned">True</Compiler>

+			<Compiler Name="UnsupportedConstruct">True</Compiler>

+			<Compiler Name="FileOpen">True</Compiler>

+			<Compiler Name="FileOpenUnitSrc">True</Compiler>

+			<Compiler Name="BadGlobalSymbol">True</Compiler>

+			<Compiler Name="DuplicateConstructorDestructor">True</Compiler>

+			<Compiler Name="InvalidDirective">True</Compiler>

+			<Compiler Name="PackageNoLink">True</Compiler>

+			<Compiler Name="PackageThreadVar">True</Compiler>

+			<Compiler Name="ImplicitImport">True</Compiler>

+			<Compiler Name="HPPEMITIgnored">True</Compiler>

+			<Compiler Name="NoRetVal">True</Compiler>

+			<Compiler Name="UseBeforeDef">True</Compiler>

+			<Compiler Name="ForLoopVarUndef">True</Compiler>

+			<Compiler Name="UnitNameMismatch">True</Compiler>

+			<Compiler Name="NoCFGFileFound">True</Compiler>

+			<Compiler Name="ImplicitVariants">True</Compiler>

+			<Compiler Name="UnicodeToLocale">True</Compiler>

+			<Compiler Name="LocaleToUnicode">True</Compiler>

+			<Compiler Name="ImagebaseMultiple">True</Compiler>

+			<Compiler Name="SuspiciousTypecast">True</Compiler>

+			<Compiler Name="PrivatePropAccessor">True</Compiler>

+			<Compiler Name="UnsafeType">False</Compiler>

+			<Compiler Name="UnsafeCode">False</Compiler>

+			<Compiler Name="UnsafeCast">False</Compiler>

+			<Compiler Name="OptionTruncated">True</Compiler>

+			<Compiler Name="WideCharReduced">True</Compiler>

+			<Compiler Name="DuplicatesIgnored">True</Compiler>

+			<Compiler Name="UnitInitSeq">True</Compiler>

+			<Compiler Name="LocalPInvoke">True</Compiler>

+			<Compiler Name="MessageDirective">True</Compiler>

+			<Compiler Name="CodePage"></Compiler>

+		</Compiler>

+		<Linker>

+			<Linker Name="MapFile">0</Linker>

+			<Linker Name="OutputObjs">0</Linker>

+			<Linker Name="GenerateHpps">False</Linker>

+			<Linker Name="ConsoleApp">1</Linker>

+			<Linker Name="DebugInfo">False</Linker>

+			<Linker Name="RemoteSymbols">False</Linker>

+			<Linker Name="GenerateDRC">False</Linker>

+			<Linker Name="MinStackSize">16384</Linker>

+			<Linker Name="MaxStackSize">1048576</Linker>

+			<Linker Name="ImageBase">4194304</Linker>

+			<Linker Name="ExeDescription"></Linker>

+		</Linker>

+		<Directories>

+			<Directories Name="OutputDir"></Directories>

+			<Directories Name="UnitOutputDir"></Directories>

+			<Directories Name="PackageDLLOutputDir"></Directories>

+			<Directories Name="PackageDCPOutputDir"></Directories>

+			<Directories Name="SearchPath">..\..\JEDI-SDL\SDL\Pas</Directories>

+			<Directories Name="Packages">vclx;vcl;rtl;vclactnband</Directories>

+			<Directories Name="Conditionals"></Directories>

+			<Directories Name="DebugSourceDirs"></Directories>

+			<Directories Name="UsePackages">False</Directories>

+		</Directories>

+		<Parameters>

+			<Parameters Name="RunParams"></Parameters>

+			<Parameters Name="HostApplication"></Parameters>

+			<Parameters Name="Launcher"></Parameters>

+			<Parameters Name="UseLauncher">False</Parameters>

+			<Parameters Name="DebugCWD"></Parameters>

+			<Parameters Name="Debug Symbols Search Path"></Parameters>

+			<Parameters Name="LoadAllSymbols">True</Parameters>

+			<Parameters Name="LoadUnspecifiedSymbols">False</Parameters>

+		</Parameters>

+		<Language>

+			<Language Name="ActiveLang"></Language>

+			<Language Name="ProjectLang">$00000000</Language>

+			<Language Name="RootDir"></Language>

+		</Language>

+		<VersionInfo>

+			<VersionInfo Name="IncludeVerInfo">False</VersionInfo>

+			<VersionInfo Name="AutoIncBuild">False</VersionInfo>

+			<VersionInfo Name="MajorVer">1</VersionInfo>

+			<VersionInfo Name="MinorVer">0</VersionInfo>

+			<VersionInfo Name="Release">0</VersionInfo>

+			<VersionInfo Name="Build">0</VersionInfo>

+			<VersionInfo Name="Debug">False</VersionInfo>

+			<VersionInfo Name="PreRelease">False</VersionInfo>

+			<VersionInfo Name="Special">False</VersionInfo>

+			<VersionInfo Name="Private">False</VersionInfo>

+			<VersionInfo Name="DLL">False</VersionInfo>

+			<VersionInfo Name="Locale">1031</VersionInfo>

+			<VersionInfo Name="CodePage">1252</VersionInfo>

+		</VersionInfo>

+		<VersionInfoKeys>

+			<VersionInfoKeys Name="CompanyName"></VersionInfoKeys>

+			<VersionInfoKeys Name="FileDescription"></VersionInfoKeys>

+			<VersionInfoKeys Name="FileVersion">1.0.0.0</VersionInfoKeys>

+			<VersionInfoKeys Name="InternalName"></VersionInfoKeys>

+			<VersionInfoKeys Name="LegalCopyright"></VersionInfoKeys>

+			<VersionInfoKeys Name="LegalTrademarks"></VersionInfoKeys>

+			<VersionInfoKeys Name="OriginalFilename"></VersionInfoKeys>

+			<VersionInfoKeys Name="ProductName"></VersionInfoKeys>

+			<VersionInfoKeys Name="ProductVersion">1.0.0.0</VersionInfoKeys>

+			<VersionInfoKeys Name="Comments"></VersionInfoKeys>

+		</VersionInfoKeys>

+	</Delphi.Personality>

+</BorlandProject>

diff --git a/src/lib/freetype/demo/lesson43.dpr b/src/lib/freetype/demo/lesson43.dpr
new file mode 100644
index 00000000..8a470a2e
--- /dev/null
+++ b/src/lib/freetype/demo/lesson43.dpr
@@ -0,0 +1,366 @@
+program lesson43;

+(*

+ * This code was created by Jeff Molofee '99

+ * (ported to Linux/SDL by Ti Leggett '01)

+ *

+ * If you've found this code useful, please let me know.

+ *

+ * Visit Jeff at http://nehe.gamedev.net/

+ *

+ * or for port-specific comments, questions, bugreports etc.

+ * email to leggett@eecs.tulane.edu

+ *)

+

+{$IFDEF FPC}

+  {$mode delphi}{$H+}

+{$ENDIF}

+

+{$APPTYPE Console}

+

+{.$DEFINE FONT2}

+

+uses

+  moduleloader in '../../JEDI-SDL/SDL/Pas/moduleloader.pas',

+  SDL          in '../../JEDI-SDL/SDL/Pas/sdl.pas',

+  gl           in '../../JEDI-SDL/OpenGL/Pas/gl.pas',

+  glext        in '../../JEDI-SDL/OpenGL/Pas/glext.pas',

+  glu          in '../../JEDI-SDL/OpenGL/Pas/glu.pas',

+  ctypes       in '../../ctypes/ctypes.pas',

+  FreeType     in '../freetype.pas',

+  {$IFNDEF FONT2}

+  UFont        in 'UFont.pas',

+  {$ELSE}

+  UFont2       in 'UFont2.pas',

+  {$ENDIF}

+  math,

+  sysutils;

+

+const

+  // screen width, height, and bit depth

+  SCREEN_WIDTH  = 640;

+  SCREEN_HEIGHT = 480;

+  SCREEN_BPP    =  16;

+

+  //FONT_FILE = 'Test.ttf';

+  //FONT_FILE = 'C:/Windows/Fonts/Arial.ttf';

+  //FONT_FILE = 'C:/Windows/Fonts/SimSun.ttf';

+  //FONT_FILE = 'C:/Windows/Fonts/SimSun.ttf';

+  FONT_FILE = 'eurostarregularextended.ttf';

+

+var

+  OurFont: TScalableFont;

+  // This is our SDL surface

+  surface: PSDL_Surface;

+  cnt1, cnt2: GLfloat;

+

+(* function to release/destroy our resources and restoring the old desktop *)

+procedure Quit(returnCode: integer);

+begin

+  OurFont.Free;

+

+  // clean up the window

+  SDL_Quit( );

+

+  // and exit appropriately

+  Halt( returnCode );

+end;

+

+(* function to reset our viewport after a window resize *)

+function resizeWindow(width: integer; height: integer): boolean;

+begin

+  // Protect against a divide by zero

+  if ( height = 0 ) then

+    height := 1;

+

+  // Setup our viewport.

+  glViewport( 0, 0, GLsizei(width), GLsizei(height) );

+

+  // change to the projection matrix and set our viewing volume.

+  glMatrixMode( GL_PROJECTION );

+  glLoadIdentity( );

+

+  // Set our perspective

+  //gluOrtho2D(0, width, 0, height);

+  gluOrtho2D(0, 800, 0, 600);

+

+  // Make sure we're chaning the model view and not the projection

+  glMatrixMode( GL_MODELVIEW );

+

+  // Reset The View

+  glLoadIdentity( );

+

+  Result := true;

+end;

+

+(* function to handle key press events *)

+procedure handleKeyPress(keysym: PSDL_keysym);

+begin

+  case ( keysym^.sym ) of

+    SDLK_ESCAPE:

+    begin

+      // ESC key was pressed

+      Quit( 0 );

+    end;

+    SDLK_F1:

+    begin

+      // F1 key was pressed

+      // this toggles fullscreen mode

+      SDL_WM_ToggleFullScreen( surface );

+    end;

+  end;

+end;

+

+(* general OpenGL initialization function *)

+function initGL(): boolean;

+begin

+  // Enable smooth shading

+  glShadeModel( GL_SMOOTH );

+

+  // Set the background black

+  //glClearColor( 1, 1, 1.0, 1.0 );

+  //glClearColor( 0.3, 0.7, 1.0, 1.0 );

+  glClearColor( 0.0, 0.0, 0.0, 1.0 );

+

+  // Depth buffer setup

+  glClearDepth( 1.0 );

+

+  // Enables Depth Testing

+  glEnable( GL_DEPTH_TEST );

+

+  // The Type Of Depth Test To Do

+  glDepthFunc( GL_LEQUAL );

+

+  // Really Nice Perspective Calculations

+  glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );

+

+  //OurFont := TFTScalableFont.Create(FONT_FILE, 64);

+  //OurFont := TFTFont.Create(FONT_FILE, 128);

+  OurFont := TFTScalableOutlineFont.Create(FONT_FILE, 64, 0.05);

+  //OurFont.UseKerning := false;

+  TFTScalableOutlineFont(OurFont).SetOutlineColor(1, 0, 0);

+  //OurFont := TOutlineFont.Create(FONT_FILE, 32, 2);

+  //OurFont.LineSpacing := OurFont.LineSpacing * 0.5;

+

+  Result := true;

+end;

+

+var

+  NextTime: cardinal;

+  Counter: integer;

+

+type

+  TVector4d = array[0..3] of GLdouble;

+

+function NewVector4d(a, b, c, d: GLdouble): TVector4d;

+begin

+  Result[0] := a;

+  Result[1] := b;

+  Result[2] := c;

+  Result[3] := d;

+end;

+

+(* Here goes our drawing code *)

+function drawGLScene(): boolean;

+var

+  msg: WideString;

+  bounds: TBoundsDbl;

+  ClipPlaneEq: TVector4d;

+begin

+  glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);  // Clear Screen And Depth Buffer

+

+  //msg := 'Here'#13'there'#13'be'#13#13'newlines'#13'.';

+  //msg := 'Here'#13'newlines';

+  msg := 'Hallo Du';//Active FreeType Text - ' + FloatToStr(cnt1);

+  //msg := 'Hören'#13'其自诞生至今'#13'спецификация';

+

+  // Red text

+  glLoadIdentity();

+  glTranslatef(cnt2, 240, 0);

+  if (cnt2 > 800) then

+    cnt2 := 0;

+  glTranslatef(30, 40, 0);

+  //glTranslatef(320, 240, 0);

+  //glRotatef(cnt1, 0, 0, 1);

+  //glScalef(1, 0.8 + 0.3*cos(cnt1/5), 1);

+

+  OurFont.Style := [Italic, Underline, Reflect];

+  //OurFont.GlyphSpacing := 10;

+  //OurFont.SetOutlineColor(0.5, 0.5, 0.5);

+  //OurFont.ReflectionSpacing := -4;

+  //OurFont.UseKerning := false;

+  OurFont.Height := 32;//cnt2;

+  //OurFont.Reset;

+  //OurFont.Aspect := 2;

+

+  {

+  glColor3f(1, 1, 0);

+  bounds := OurFont.BBox(msg);

+  glRectf(bounds.Left, bounds.Top, bounds.Right, bounds.Bottom);

+  }

+

+  {

+  glEnable(GL_CLIP_PLANE0);

+  ClipPlaneEq := NewVector4d(-1, 0, 0, bounds.Right/5);

+  glClipPlane(GL_CLIP_PLANE0, @ClipPlaneEq);

+  }

+  //glColor3f(1, 0, 0);

+  glColor3f(1, 1, 1);

+  //OurFont.ReflectionSpacing := 0;

+  OurFont.Print(msg);

+

+  glTranslatef(0, 50, 0);

+  glColor3f(1, 1, 0);

+  bounds := OurFont.BBox('Hallo ');

+  glRectf(bounds.Left, bounds.Top, bounds.Right, bounds.Bottom);

+  OurFont.Print('Hallo ');

+

+  {

+  ClipPlaneEq := NewVector4d(1, 0, 0, -bounds.Right/5);

+  glClipPlane(GL_CLIP_PLANE0, @ClipPlaneEq);

+  glColor3f(0, 0, 1);

+  OurFont.Print(msg);

+  glDisable(GL_CLIP_PLANE0);

+  //glColor3f(0, 1, 0);

+  //OurFont.Style := OurFont.Style - [Italic];

+  //OurFont.Print(msg);

+  }

+

+  cnt1 := cnt1 + 0.051;  // Increase The First Counter

+  cnt2 := cnt2 + 0.005;  // Increase The First Counter

+

+  SDL_GL_SwapBuffers( );

+

+  Inc(Counter);

+

+  if (NextTime < SDL_GetTicks()) then

+  begin

+    NextTime := SDL_GetTicks() + 2000;

+    writeln('FPS: ' + floattostr(Counter / 2.0));

+    Counter := 0;

+  end;

+

+  Result := true;

+end;

+

+var

+  // Flags to pass to SDL_SetVideoMode

+  videoFlags: integer;

+  // main loop variable

+  done: boolean = false;

+  // used to collect events

+  event: TSDL_Event;

+  // this holds some info about our display

+  videoInfo: PSDL_VideoInfo;

+  // whether or not the window is active

+  isActive: boolean = true;

+

+begin

+  // initialize SDL

+  if ( SDL_Init( SDL_INIT_VIDEO or SDL_INIT_TIMER ) < 0 ) then

+  begin

+    writeln( ErrOutput, 'Video initialization failed: ' + SDL_GetError() );

+    Quit( 1 );

+  end;

+

+  // Fetch the video info

+  videoInfo := SDL_GetVideoInfo( );

+

+  if ( videoInfo = nil ) then

+  begin

+    writeln( ErrOutput, 'Video query failed: ' + SDL_GetError() );

+    Quit( 1 );

+  end;

+

+  SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); // Enable double buffering

+

+  // the flags to pass to SDL_SetVideoMode

+  videoFlags := SDL_OPENGL;                        // Enable OpenGL in SDL

+  videoFlags := videoFlags or SDL_HWPALETTE;       // Store the palette in hardware

+  videoFlags := videoFlags or SDL_RESIZABLE;       // Enable window resizing

+

+  // This checks to see if surfaces can be stored in memory

+  if ( videoInfo^.hw_available <> 0 ) then

+    videoFlags := videoFlags or SDL_HWSURFACE

+  else

+    videoFlags := videoFlags or SDL_SWSURFACE;

+

+  // This checks if hardware blits can be done

+  if ( videoInfo^.blit_hw <> 0 ) then

+    videoFlags := videoFlags or SDL_HWACCEL;

+

+  // Sets up OpenGL double buffering

+  SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );

+

+  // get a SDL surface

+  surface := SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP,

+                               videoFlags );

+

+  // Verify there is a surface

+  if ( surface = nil ) then

+  begin

+    writeln( ErrOutput, 'Video mode set failed: ' + SDL_GetError() );

+    Quit( 1 );

+  end;

+

+  // initialize OpenGL

+  initGL();

+

+  // resize the initial window

+  resizeWindow( SCREEN_WIDTH, SCREEN_HEIGHT );

+

+  // wait for events

+  while ( not done ) do

+  begin

+    { handle the events in the queue }

+

+    while ( SDL_PollEvent( @event ) <> 0 ) do

+    begin

+      case( event.type_ ) of

+        SDL_ACTIVEEVENT:

+        begin

+          // Something's happend with our focus

+          // If we are iconified, we shouldn't draw the screen

+          if ( (event.active.state and SDL_APPACTIVE) <> 0 ) then

+          begin

+            if (  event.active.gain = 0 ) then

+              isActive := false

+            else

+              isActive := true;

+          end;

+        end;

+        SDL_VIDEORESIZE:

+        begin

+          // handle resize event

+          {$IFDEF UNIX}

+          surface := SDL_SetVideoMode( event.resize.w,

+              event.resize.h,

+              16, videoFlags );

+          if ( surface = nil ) then

+          begin

+            writeln( ErrOutput, 'Could not get a surface after resize: ' + SDL_GetError( ) );

+            Quit( 1 );

+          end;

+          {$ENDIF}

+          resizeWindow( event.resize.w, event.resize.h );

+        end;

+        SDL_KEYDOWN:

+        begin

+          // handle key presses

+          handleKeyPress( @event.key.keysym );

+        end;

+        SDL_QUITEV:

+        begin

+          // handle quit requests

+          done := true;

+        end;

+      end;

+    end;

+

+    // draw the scene

+    if ( isActive ) then

+      drawGLScene( );

+  end;

+

+  // clean ourselves up and exit

+  Quit( 0 );

+end.

diff --git a/src/lib/freetype/demo/lesson43.lpi b/src/lib/freetype/demo/lesson43.lpi
new file mode 100644
index 00000000..b6791f18
--- /dev/null
+++ b/src/lib/freetype/demo/lesson43.lpi
@@ -0,0 +1,272 @@
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+<CONFIG>

+  <ProjectOptions>

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+    </General>

+    <VersionInfo>

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+      <Language Value=""/>

+      <CharSet Value=""/>

+    </VersionInfo>

+    <PublishOptions>

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+      <ExcludeFileFilter Value="*.(bak|ppu|ppw|o|so);*~;backup"/>

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+        <UsageCount Value="72"/>

+        <Loaded Value="True"/>

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+      <Unit1>

+        <Filename Value="JEDI-SDL\OpenGL\Pas\opengl12.pas"/>

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+      <Unit2>

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+      </Unit4>

+      <Unit5>

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