/*******************************************************************/
/*                                                                 */
/*                      ADOBE CONFIDENTIAL                         */
/*                   _ _ _ _ _ _ _ _ _ _ _ _ _                     */
/*                                                                 */
/* Copyright 2004 Adobe Systems Incorporated                       */
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/* any.  The intellectual and technical concepts contained         */
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/* Incorporated.                                                   */
/*                                                                 */
/*******************************************************************/
#ifndef SCREENQUADINCLUDE_FX
#define SCREENQUADINCLUDE_FX

// Transformations
float4x4 WorldViewProjection : WORLDVIEWPROJECTION
<
	string UIWidget="None";
>;

// Texure offset
float2	QuadScreenSize : VIEWPORTPIXELSIZE < string UIWidget="None"; >;

// Texture Offset Correction
float2 QuadTexOffset = 0.5f;

struct QuadVertexOutput 
{
   	float4 Position	: POSITION;
    float2 UV		: TEXCOORD0;
};
 
/*
** Vertex Shaders
*/
QuadVertexOutput ScreenQuadVS(
		float3 Position : POSITION, 
		float3 TexCoord : TEXCOORD0
) 
{
    QuadVertexOutput OUT;
    OUT.Position = mul(float4(Position, 1), WorldViewProjection);

	// Offset adjusts for the difference in sampling point between texture coordinates and render targets
	float2 offset = 0;
	offset = float2(QuadTexOffset.x/(QuadScreenSize.x),QuadTexOffset.y/(QuadScreenSize.y));

    OUT.UV = float2(TexCoord.xy + offset); 

    return OUT;
}

/*
** Vertex Shaders
*/
QuadVertexOutput ScreenQuadVS420Interlaced(
		float3 Position : POSITION, 
		float3 TexCoord : TEXCOORD0
) 
{
    QuadVertexOutput OUT;
    OUT.Position = mul(float4(Position, 1), WorldViewProjection);

	// Offset adjusts for the difference in sampling point between texture coordinates and render targets
	// In this case, since the image is planar in memory (see the 420 shader for details), the Y component is only 1/3 
	//	the total height, so this offset needs to be adjusted by that amount.
	float2 offset = 0;
	offset = float2(QuadTexOffset.x/(QuadScreenSize.x),QuadTexOffset.y/(QuadScreenSize.y/3.0f));

    OUT.UV = float2(TexCoord.xy + offset); 

    return OUT;
}

/*
** Vertex Shaders
*/
QuadVertexOutput ScreenQuadVS420(
		float3 Position : POSITION, 
		float3 TexCoord : TEXCOORD0
) 
{
    QuadVertexOutput OUT;
    OUT.Position = mul(float4(Position, 1), WorldViewProjection);

	// Offset adjusts for the difference in sampling point between texture coordinates and render targets
	// In this case, since the image is planar in memory (see the 420 shader for details), the Y component is only 1/3 
	//	the total height, so this offset needs to be adjusted by that amount.
	float2 offset = 0;
	offset = float2(QuadTexOffset.x/(QuadScreenSize.x),QuadTexOffset.y/(QuadScreenSize.y * 2.0f / 3.0f));

    OUT.UV = float2(TexCoord.xy + offset); 

    return OUT;
}

#endif