#include "kernel.h"

ConstantBuffer<K_ShapeSig> sig : register(b0);

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

Struct(VsInput)
{
    Semantic(u32, SV_VertexID);
};

Struct(VSOutput)
{
    Semantic(Vec4, SV_Position);
    Semantic(Vec4, color_srgb);
};

K_ENTRY VSOutput vs(VsInput input)
{
    StructuredBuffer<K_ShapeVert> verts = GpuResourceFromUrid(sig.verts_urid);
    K_ShapeVert vert = verts[input.SV_VertexID];
    VSOutput output;
    output.SV_Position = mul(sig.projection, Vec4(vert.pos.xy, 0, 1));
    output.color_srgb = Vec4NormFromU32(vert.color_srgb);
    return output;
}

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

Struct(PsInput)
{
    VSOutput vs;
};

Struct(PSOutput)
{
    Semantic(Vec4, SV_Target);
};

K_ENTRY PSOutput ps(PsInput input)
{
    PSOutput output;
    output.SV_Target = input.vs.color_srgb;
    return output;
}