#include <metal_stdlib>
using namespace metal;

struct Uniforms {
  float4x4 projection;
};

struct VertexIn {
  float2 position [[attribute(0)]];
  float2 uv       [[attribute(1)]];
  float4 color    [[attribute(2)]];
};

struct VertexOut {
  float4 position [[position]];
  float2 uv;
  float4 color;
};

vertex VertexOut vertex_main(
  VertexIn in [[stage_in]],
  constant Uniforms &uniforms [[buffer(0)]]
) {
  VertexOut out;
  out.position = uniforms.projection * float4(in.position, 0.0, 1.0);
  out.uv = in.uv;
  out.color = in.color;
  return out;
}