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//*******************************************************************
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// glfont2.h -- Header for glfont2.cpp
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// Copyright (c) 1998-2002 Brad Fish
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// See glfont.html for terms of use
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// May 14, 2002
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//
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// Symbian OS port - June 2007
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// Luis Valente - lpvalente@gmail.com
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//
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//*******************************************************************
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#ifndef GLFONT2_H
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#define GLFONT2_H
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#include <e32base.h>
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#include <GLES/gl.h>
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//_____________________________________________________________________________
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//
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// Simple class to output text as texture-mapped triangles. Does not support
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// unicode strings. Reference point when drawing: top-left.
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//
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class GLFont
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{
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public:
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/**
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* Factory-method.
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*/
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static GLFont* NewL (const TDesC & aFilename);
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public:
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/**
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* Destructor.
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*/
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~GLFont ();
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public:
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/**
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* Retrieves the texture width and height.
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*/
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void GetTexSize (TInt & aWidth, TInt & aHeight);
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/**
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* Retrieves the character interval.
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*/
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void GetCharInterval (TInt & aStart, TInt & aEnd);
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/**
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* Retrieves the character dimensions.
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*/
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void GetCharSize (TText8 c, TInt & aWidth, TInt aHeight);
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/**
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* Calculates the dimensions of a string.
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*/
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void GetStringSize (const TDesC8 & aText, TInt & aWidth, TInt & aHeight);
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/**
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* Renders a string.
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*/
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void DrawString (const TDesC8 & aText, GLfixed aX, GLfixed aY);
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/**
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* Sets required states for the font.
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*/
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void BeginDraw ()
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{
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glEnable (GL_BLEND);
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glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glEnable (GL_TEXTURE_2D);
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glEnableClientState (GL_TEXTURE_COORD_ARRAY);
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}
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/**
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* Turns off required states.
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*/
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void EndDraw ()
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{
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glDisable (GL_BLEND);
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glDisable (GL_TEXTURE_2D);
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glDisableClientState (GL_TEXTURE_COORD_ARRAY);
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}
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private:
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/**
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* Default constructor.
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*/
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GLFont ();
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/**
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* Final part of the two-phase constructor.
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*/
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void ConstructL (const TDesC & aFilename);
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/**
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* Loads the font file.
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*/
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void LoadFileL (RFs & aFs, const TDesC & aFilename);
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/**
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* Destroys the font.
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*/
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void Destroy ();
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private:
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// single character
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struct GLFontChar
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{
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GLfixed dx, dy;
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GLfixed tx1, ty1;
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GLfixed tx2, ty2;
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};
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// font header
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struct GLFontHeader
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{
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GLuint tex;
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TInt texWidth, texHeight;
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TInt startChar, endChar;
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GLFontChar *chars;
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};
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private:
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GLFontHeader iHeader;
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};
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//*******************************************************************
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#endif |