#include <metal_stdlib>
using namespace metal;

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

struct SpriteVertexOut {
    float4 position [[position]];
    float4 color;
    float2 texCoord;
};

vertex SpriteVertexOut sprite_vertex_main(SpriteVertexIn in [[stage_in]]) {
    SpriteVertexOut out;
    out.position = float4(in.position, 0.0, 1.0);
    out.color = in.color;
    out.texCoord = in.texCoord;
    return out;
}

fragment float4 sprite_fragment_main(SpriteVertexOut in [[stage_in]],
                                   texture2d<float> spriteTexture [[texture(0)]],
                                   sampler textureSampler [[sampler(0)]]) {
    float4 textureColor = spriteTexture.sample(textureSampler, in.texCoord);
    return textureColor * in.color;  // Multiplicar textura por color de vértice para tinting
}