orni-attack/source/core/config/postfx_config.cpp

// postfx_config.cpp - Implementación del cargador de YAML del postpro.

#include "core/config/postfx_config.hpp"

#include <iostream>

#include "core/resources/resource_helper.hpp"
#include "external/fkyaml_node.hpp"

namespace Config::PostFx {

namespace {

// Helper: lee `key` en `node` solo si existe; deja `dst` intacto en caso
// contrario. Así, un YAML parcial sigue funcionando con los defaults del
// struct para los campos que falten.
template <typename T>
void readField(const fkyaml::node& node, const char* key, T& dst) {
    if (node.contains(key)) {
        dst = node[key].get_value<T>();
    }
}

// Lee un array RGB [r, g, b] (0..255) y lo normaliza a [0..1] sobre tres
// destinos floats. Si la clave no existe o no es secuencia de 3, deja los
// destinos como están.
void readRgb255(const fkyaml::node& node, const char* key,
                float& dst_r, float& dst_g, float& dst_b) {
    if (!node.contains(key)) {
        return;
    }
    const auto& arr = node[key];
    if (!arr.is_sequence() || arr.size() < 3) {
        return;
    }
    try {
        const auto R = arr[0].get_value<int>();
        const auto G = arr[1].get_value<int>();
        const auto B = arr[2].get_value<int>();
        dst_r = static_cast<float>(R) / 255.0F;
        dst_g = static_cast<float>(G) / 255.0F;
        dst_b = static_cast<float>(B) / 255.0F;
    } catch (...) {  // @INTENTIONAL
        // Mantiene los defaults si algún elemento del RGB no es entero parseable
        // (el YAML viene de archivo, así que es razonable degradar a los defaults
        // en vez de propagar la excepción y abortar el load del postpro entero).
    }
}

}  // namespace

auto load(const std::string& path) -> Rendering::GPU::PostFxParams {
    Rendering::GPU::PostFxParams params{};  // valores por defecto del struct

    auto bytes = Resource::Helper::loadFile(path);
    if (bytes.empty()) {
        std::cerr << "[PostFxConfig] No se pudo cargar " << path
                  << " — usando defaults built-in\n";
        return params;
    }

    try {
        const auto* begin = reinterpret_cast<const char*>(bytes.data());
        const auto* end = begin + bytes.size();
        auto yaml = fkyaml::node::deserialize(begin, end);

        if (yaml.contains("bloom") && yaml["bloom"].is_mapping()) {
            const auto& node = yaml["bloom"];
            readField(node, "enabled", params.bloom_enabled);
            readField(node, "intensity", params.bloom_intensity);
            readField(node, "threshold", params.bloom_threshold);
            readField(node, "radius_px", params.bloom_radius_px);
        }

        if (yaml.contains("flicker") && yaml["flicker"].is_mapping()) {
            const auto& node = yaml["flicker"];
            readField(node, "enabled", params.flicker_enabled);
            readField(node, "amplitude", params.flicker_amplitude);
            readField(node, "frequency_hz", params.flicker_frequency_hz);
        }

        if (yaml.contains("background") && yaml["background"].is_mapping()) {
            const auto& node = yaml["background"];
            readField(node, "enabled", params.background_enabled);
            readRgb255(node, "color_min",
                       params.background_min_r,
                       params.background_min_g,
                       params.background_min_b);
            readRgb255(node, "color_max",
                       params.background_max_r,
                       params.background_max_g,
                       params.background_max_b);
            readField(node, "pulse_frequency_hz", params.background_pulse_freq_hz);
        }

        std::cout << "[PostFxConfig] Cargado " << path
                  << " (bloom=" << (params.bloom_enabled ? "on" : "off")
                  << " intensity=" << params.bloom_intensity
                  << ", flicker=" << (params.flicker_enabled ? "on" : "off")
                  << " amp=" << params.flicker_amplitude
                  << ", bg=" << (params.background_enabled ? "on" : "off")
                  << ")\n";
    } catch (const fkyaml::exception& e) {
        std::cerr << "[PostFxConfig] Error parseando " << path << ": " << e.what()
                  << " — usando defaults built-in\n";
    }
    return params;
}

}  // namespace Config::PostFx