/**************************************************************************
**
** This file is part of Qt Creator
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** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** GNU Lesser General Public License Usage
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
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// Fragment shader special variables.
vec4  gl_FragCoord;
bool  gl_FrontFacing;
vec4  gl_FragColor;
vec4  gl_FragData[gl_MaxDrawBuffers];
float gl_FragDepth;

// Varying variables.
varying vec4  gl_Color;
varying vec4  gl_SecondaryColor;
varying vec4  gl_TexCoord[];
varying float gl_FogFragCoord;
varying vec2  gl_PointCoord;

// Fragment processing functions.
float dFdx(float p);
vec2 dFdx(vec2 p);
vec3 dFdx(vec3 p);
vec4 dFdx(vec4 p);
float dFdy(float p);
vec2 dFdy(vec2 p);
vec3 dFdy(vec3 p);
vec4 dFdy(vec4 p);
float fwidth(float p);
vec2 fwidth(vec2 p);
vec3 fwidth(vec3 p);
vec4 fwidth(vec4 p);