Function testConversionFunction

tests/fl/hsv2rgb_accuracy.cpp:75–107

// Test a specific conversion function with RGB -> HSV -> RGB round trip
template<typename ConversionFunc>
static AccuracyStats testConversionFunction(ConversionFunc hsv2rgb_func, const char* func_name) {
    (void)func_name; // Suppress unused parameter warning
    AccuracyStats stats;
    
    // Test a comprehensive set of RGB colors
    // We'll test every 16th value to get good coverage without taking too long
    // Increased step from 8 to 16 for performance (32^3 -> 16^3 iterations = 32K -> 4K = 87.5% reduction)
    // Still provides excellent coverage: 16^3 = 4,096 test cases per conversion function
    const int step = 16;
    
    for (int r = 0; r < 256; r += step) {
        for (int g = 0; g < 256; g += step) {
            for (int b = 0; b < 256; b += step) {
                // Original RGB color
                CRGB original_rgb(r, g, b);
                
                // Convert RGB -> HSV
                CHSV hsv = rgb2hsv_approximate(original_rgb);
                
                // Convert HSV -> RGB using the test function
                CRGB converted_rgb;
                hsv2rgb_func(hsv, converted_rgb);
                
                // Calculate deviation
                float deviation = calculateRGBDeviation(original_rgb, converted_rgb);
                stats.deviations.push_back(deviation);
            }
        }
    }
    
    stats.calculate();
    return stats;
}

FL_TEST_CASE("HSV to RGB Conversion Accuracy Comparison") {
    FL_WARN("=== HSV to RGB Conversion Accuracy Test ===");