struct Vertex
{
    float3 pos;
    float4 color;
    float2 texture_coords;
};

struct VertexData
{
    float4 color;
    float2 texture_coords;
};

struct VertexStageOutput
{
    VertexData vertex_data : VertexData;
    float4 sv_position : SV_Position;
};

struct Fragment
{
    float4 color;
};

cbuffer Uniforms
{
    float4x4 projection;
};

Sampler2D main_texture;

[shader("vertex")]
VertexStageOutput vertex_main(Vertex vertex: VERTEX)
{
    VertexStageOutput stage_output;

    stage_output.sv_position = mul(projection, float4(vertex.pos.xy, 0.f, 1.f));

    stage_output.vertex_data.color = vertex.color;
    stage_output.vertex_data.texture_coords = vertex.texture_coords;

    return stage_output;
}

[shader("fragment")]
Fragment fragment_main(VertexData vertex_data: VertexData) : SV_Target
{
    Fragment fragment;

    fragment.color = vertex_data.color * main_texture.Sample(vertex_data.texture_coords);

    return fragment;
}