//*******************************************************************

// glfont2.h -- Header for glfont2.cpp

// Copyright (c) 1998-2002 Brad Fish

// See glfont.html for terms of use

// May 14, 2002

//

// Symbian OS port - June 2007

// Luis Valente - lpvalente@gmail.com

//

//*******************************************************************

#ifndef GLFONT2_H

#define GLFONT2_H

#include <e32base.h>

#include <GLES/gl.h>

//_____________________________________________________________________________

//

// Simple class to output text as texture-mapped triangles. Does not support

// unicode strings. Reference point when drawing: top-left.

//

class GLFont

{	

  public:

   /**

    * Factory-method.

    */

   static GLFont* NewL (const TDesC & aFilename);

  public:

   /**

    * Destructor.

    */		

   ~GLFont ();

  public:

   /**

    * Retrieves the texture width and height.

    */	

   void GetTexSize (TInt & aWidth, TInt & aHeight);

   /**

    * Retrieves the character interval.

    */	

   void GetCharInterval (TInt & aStart, TInt & aEnd);

   /**

    * Retrieves the character dimensions.

    */

   void GetCharSize (TText8 c, TInt & aWidth, TInt aHeight);

   /**

    * Calculates the dimensions of a string.

    */

   void GetStringSize (const TDesC8 & aText, TInt & aWidth, TInt & aHeight);

   /**

    * Renders a string.

    */

   void DrawString (const TDesC8 & aText, GLfixed aX, GLfixed aY);	

   /**

    * Sets required states for the font.

    */

   void BeginDraw ()

   {			

    glEnable (GL_BLEND);

    glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    glEnable (GL_TEXTURE_2D);

    glEnableClientState (GL_TEXTURE_COORD_ARRAY);

   }

   /**

    * Turns off required states.

    */

   void EndDraw ()

   {			

    glDisable (GL_BLEND);			

    glDisable (GL_TEXTURE_2D);

    glDisableClientState (GL_TEXTURE_COORD_ARRAY);

   }		

 private:

    /**

     * Default constructor.

     */

   GLFont ();

   /**

    * Final part of the two-phase constructor.

    */

   void ConstructL (const TDesC & aFilename);

   /**

    * Loads the font file.

    */

   void LoadFileL (RFs & aFs, const TDesC & aFilename);		

   /**

    * Destroys the font.

    */		

   void Destroy ();		

  private:	

   // single character

   struct GLFontChar

   {

      GLfixed dx, dy;

      GLfixed tx1, ty1;

      GLfixed tx2, ty2;

   };

   // font header

   struct GLFontHeader

   {

      GLuint tex;

      TInt   texWidth, texHeight;

      TInt   startChar, endChar;

      GLFontChar *chars;

   };			

 private:

   GLFontHeader iHeader;

};

//*******************************************************************

#endif