#include "shaders/common.hlsl"

struct vs_input {
    DECL(float4, pos);
    DECL(float2, uv);
    DECL(float4, tint_srgb);
};

struct ps_input {
    DESV(float4, screen_pos, SV_POSITION);
    DECL(float2, uv);
    DECL(float4, tint_lin);
};

/* ========================== *
 * Globals
 * ========================== */

SamplerState G_sampler : register(s0);

Texture2D G_texture : register(t0); 

cbuffer constants : register(b0)
{
    float4x4 G_projection;
};

/* ========================== *
 * Vertex shader
 * ========================== */

ps_input vs_main(vs_input input)
{
    ps_input output;

    output.screen_pos = mul(G_projection, float4(input.pos.xy, 0.f, 1.f));
    output.uv = input.uv;
    output.tint_lin = linear_from_srgb(input.tint_srgb);

    return output;
}

/* ========================== *
 * Pixel shader
 * ========================== */

float4 ps_main(ps_input input) : SV_TARGET
{
    float4 color = G_texture.Sample(G_sampler, input.uv) * input.tint_lin;
    return color;
}