Pass
{

$splice(PassName)

// Render State
$splice(RenderState)

// Debug
$splice(Debug)

// --------------------------------------------------
// Pass

HLSLPROGRAM

// Pragmas
$splice(PassPragmas)

// Keywords
$splice(PassKeywords)
$splice(GraphKeywords)

// Defines
$Attributes.vertexID: #define ATTRIBUTES_NEED_VERTEXID
$Attributes.uv0: #define ATTRIBUTES_NEED_TEXCOORD0
$Attributes.uv1: #define ATTRIBUTES_NEED_TEXCOORD1
$Attributes.uv2: #define ATTRIBUTES_NEED_TEXCOORD2
$Attributes.uv3: #define ATTRIBUTES_NEED_TEXCOORD3

$Varyings.texCoord0: #define VARYINGS_NEED_TEXCOORD0
$Varyings.texCoord1: #define VARYINGS_NEED_TEXCOORD1
$Varyings.texCoord2: #define VARYINGS_NEED_TEXCOORD2
$Varyings.texCoord3: #define VARYINGS_NEED_TEXCOORD3


$splice(PassInstancing)
$splice(GraphDefines)

// Includes
$splice(PreGraphIncludes)

// --------------------------------------------------
// Structs and Packing

$splice(PassStructs)

$splice(InterpolatorPack)

// --------------------------------------------------
// Graph

// Graph Properties
$splice(GraphProperties)

// Graph Includes
$splice(GraphIncludes)

// Graph Functions
$splice(GraphFunctions)

// Graph Pixel
$splice(GraphPixel)

// --------------------------------------------------
// Build Graph Inputs

void BuildVaryings(Attributes input, inout Varyings output)
{
    UNITY_SETUP_INSTANCE_ID(input);
    UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);

    output.texCoord0 = output.positionCS * 0.5 + 0.5;

#if UNITY_UV_STARTS_AT_TOP
    if (_FlipY < 0.5)
        output.texCoord0.y = 1 - output.texCoord0.y;
#endif

    float3 p = ComputeWorldSpacePosition(output.positionCS, UNITY_MATRIX_I_VP);

    // Encode view direction in texCoord1
    output.texCoord1.xyz = GetWorldSpaceViewDir(p);
}

float3 _WaterDecalTimeParameters;

SurfaceDescriptionInputs BuildSurfaceDescriptionInputs(Varyings input)
{
    SurfaceDescriptionInputs output;
    ZERO_INITIALIZE(SurfaceDescriptionInputs, output);

    $SurfaceDescriptionInputs.ScreenPosition:                           output.ScreenPosition = float4(input.texCoord0.xy, 0, 1);
    $SurfaceDescriptionInputs.NDCPosition:                              output.NDCPosition = input.texCoord0.xy;

    $SurfaceDescriptionInputs.uv0:                                      output.uv0 = input.texCoord0;
    $SurfaceDescriptionInputs.uv1:                                      output.uv1 = input.texCoord1;
    $SurfaceDescriptionInputs.uv2:                                      output.uv2 = input.texCoord2;
    $SurfaceDescriptionInputs.uv3:                                      output.uv3 = input.texCoord3;

    $SurfaceDescriptionInputs.TimeParameters:                           output.TimeParameters = _WaterDecalTimeParameters.xyz;

    return output;
}

// --------------------------------------------------
// Main

PackedVaryings Vert(Attributes input)
{
    Varyings output = (Varyings)0;
    output.positionCS = GetFullScreenTriangleVertexPosition(input.vertexID, UNITY_RAW_FAR_CLIP_VALUE);
    BuildVaryings(input, output);
    PackedVaryings packedOutput = PackVaryings(output);
    return packedOutput;
}

#ifdef PASS_DEFORMATION
	#define TARGET_TYPE float
#elif defined(PASS_FOAM)
	#define TARGET_TYPE float2
#endif


TARGET_TYPE Frag(PackedVaryings packedInput) : SV_Target
{
    Varyings varyings = UnpackVaryings(packedInput);
	SurfaceDescriptionInputs inputs = BuildSurfaceDescriptionInputs(varyings);
	SurfaceDescription surface = SurfaceDescriptionFunction(inputs);

#ifdef PASS_DEFORMATION
    return surface.Deformation;
#elif defined(PASS_FOAM)
	return float2(surface.SurfaceFoam, surface.DeepFoam);
#endif
}

$splice(PostGraphIncludes)

ENDHLSL
}