//
// Copyright 2019 The ANGLE Project. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// clear.metal: Implements viewport clearing.

#include "common.h"

using namespace rx::mtl_shader;

struct ClearParams
{
    float4 clearColor;
    float clearDepth;
};

vertex float4 clearVS(unsigned int vid [[ vertex_id ]],
                      constant ClearParams &clearParams [[buffer(0)]])
{
    return float4(gCorners[vid], clearParams.clearDepth, 1.0);
}

fragment MultipleColorOutputs<float> clearFloatFS(constant ClearParams &clearParams [[buffer(0)]])
{
    return toMultipleColorOutputs(clearParams.clearColor);
}

fragment MultipleColorOutputs<int> clearIntFS(constant ClearParams &clearParams [[buffer(0)]])
{
    return toMultipleColorOutputs(as_type<int4>(clearParams.clearColor));
}

fragment MultipleColorOutputs<uint> clearUIntFS(constant ClearParams &clearParams [[buffer(0)]])
{
    return toMultipleColorOutputs(as_type<uint4>(clearParams.clearColor));
}