//**************************************************************************/
// Copyright (c) 2008 Autodesk, Inc.
// All rights reserved.
//
// These coded instructions, statements, and computer programs contain
// unpublished proprietary information written by Autodesk, Inc., and are
// protected by Federal copyright law. They may not be disclosed to third
// parties or copied or duplicated in any form, in whole or in part, without
// the prior written consent of Autodesk, Inc.
//**************************************************************************/
// DESCRIPTION: Common shader code.
// AUTHOR: Mauricio Vives, converted to OGSFX by Eric Haines, July 2013
// CREATED: December 2008
//**************************************************************************/

#ifndef _COMMON_OGSFH_
#define _COMMON_OGSFH_

// World-view-projection transformation.
uniform mat4 gWVPXf : WorldViewProjection;

// Screen size, in pixels.
uniform vec2 gScreenSize : ViewportPixelSize;
// insert in GLSL_shader itself
// vec2 gTexelSize = 1.0 / gScreenSize;

////////////////////////////////////////////////////////////////////////////////////////////////////
// Screen Quad Vertex Shader
////////////////////////////////////////////////////////////////////////////////////////////////////

// Vertex shader input structure.
attribute VS_INPUT_ScreenQuad
{
    vec3 Pos : POSITION;
    vec2 UV :  TEXCOORD0;
}

// Vertex shader output structure.
attribute pixelOut
{
    vec4 colorOut: COLOR0;
}

attribute VS_TO_PS_ScreenQuad
{
    vec2 VSUV : TEXCOORD0;
}

// Vertex shader.
GLSLShader VS_ScreenQuad
{
    void main()
    {
        // Output the position and texture coordinates directly.
        gl_Position = gWVPXf*vec4(Pos, 1.0);
        VSUV = UV;
    }
}

#endif // _COMMON_OGSFH_