/*
* Copyright (c) 2014-2021, NVIDIA CORPORATION. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/

struct Constants
{
    float2 invDisplaySize;
    float outputNits;
};

#ifdef SPIRV

[[vk::push_constant]] ConstantBuffer<Constants> g_Const;

#else

cbuffer g_Const : register(b0) { Constants g_Const; }

#endif

struct VS_INPUT
{
    float2 pos : POSITION;
    float2 uv  : TEXCOORD0;
    float4 col : COLOR0;
};

struct PS_INPUT
{
    float4 out_pos : SV_POSITION;
    float4 out_col : COLOR0;
    float2 out_uv  : TEXCOORD0;
};

PS_INPUT main(VS_INPUT input)
{
    PS_INPUT output;
    output.out_pos.xy = input.pos.xy * g_Const.invDisplaySize * float2(2.0, -2.0) + float2(-1.0, 1.0);
    output.out_pos.zw = float2(0, 1);
    output.out_col = input.col;
    output.out_uv = input.uv;
    return output;
}