//
// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

sampler2D tex : s0;

uniform float4 mult : c0;
uniform float4 add  : c1;

// Passthrough Pixel Shader
// Outputs texture 0 sampled at texcoord 0.
float4 PS_passthrough(float4 texcoord : TEXCOORD0) : COLOR
{
    return tex2D(tex, texcoord.xy);
};

// Luminance Conversion Pixel Shader
// Performs a mad operation using the LA data from the texture with mult.xw and add.xw.
// Returns data in the form of llla
float4 PS_luminance(float4 texcoord : TEXCOORD0) : COLOR
{
    return (tex2D(tex, texcoord.xy).xw * mult.xw + add.xw).xxxy;
};

// RGB/A Component Mask Pixel Shader
// Performs a mad operation using the texture's RGBA data with mult.xyzw and add.xyzw.
// Returns data in the form of rgba
float4 PS_componentmask(float4 texcoord : TEXCOORD0) : COLOR
{
    return tex2D(tex, texcoord.xy) * mult + add;
};