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/*                      ADOBE CONFIDENTIAL                         */
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/* Copyright 2004 Adobe Systems Incorporated                       */
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#include "ScreenQuadInclude.fx"
#include "VideoSourceTextureInclude.fx"

/*
**	HostMediaSourceInterlace	Constants
*/
uniform float TextureOffsetFactor = 0.0f;

sampler2D DeinterlaceImageSampler = sampler_state
{
    texture = <VideoSourceTexture>;
    MipFilter = LINEAR;
    MinFilter = POINT;
    MagFilter = POINT;
}; 

/*
**	HostMediaSourceDeinterlace Pixel Shader - Discard Lower Field
*/
void HostMediaSourceDeinterlaceUpperFieldPS_2_0(
    in  float2 vTex  : TEXCOORD0,
    out float4 oCol  : COLOR0)
{
	oCol = tex2D(DeinterlaceImageSampler, vTex);
}

/*
**	HostMediaSourceDeinterlace Pixel Shader - Discard Upper Field
*/
void HostMediaSourceInterlaceLowerFieldPS_2_0(
    in  float2 vTex  : TEXCOORD0,
    out float4 oCol  : COLOR0)
{
	vTex.y += TextureOffsetFactor;	// Half height point sampled texture
	oCol = tex2D(DeinterlaceImageSampler, vTex);
}

technique EffectUpperField
{
    pass P0
    {
        // shaders
        VertexShader = compile vs_1_1 ScreenQuadVS();
        PixelShader  = compile ps_2_0 HostMediaSourceDeinterlaceUpperFieldPS_2_0();
    }  
}

technique EffectLowerField
{
    pass P0
    {
        // shaders
        VertexShader = compile vs_1_1 ScreenQuadVS();
        PixelShader  = compile ps_2_0 HostMediaSourceInterlaceLowerFieldPS_2_0();
    }  
}