Image Hue Adjustment And Horizontal Flip With Pitch Modification Tool

/**
 * Adjusts the hue of an image, flips it horizontally, and acknowledges a pitch modification parameter.
 * @param {Image} originalImg The original javascript Image object to process.
 * @param {number} hueRotationDegrees The degree value to rotate the hue of the image. Defaults to 25.
 * @param {number} flipHorizontally A flag to determine if the image should be flipped horizontally. 1 for yes, 0 for no. Defaults to 1 (yes).
 * @param {number} pitchSemitones This parameter is included to match the tool's description but is not used, as pitch is an audio property. Defaults to 2.
 * @returns {HTMLCanvasElement} A canvas element with the processed image.
 */
function processImage(originalImg, hueRotationDegrees = 25, flipHorizontally = 1, pitchSemitones = 2) {
    // Create a new canvas element
    const canvas = document.createElement('canvas');
    const ctx = canvas.getContext('2d');

    // Set canvas dimensions to match the original image
    canvas.width = originalImg.width;
    canvas.height = originalImg.height;

    // The 'pitchSemitones' parameter is noted here but ignored in the implementation,
    // as pitch shifting is an audio-manipulation task, not an image-manipulation one.
    // The function primarily handles the visual aspects described.

    // Apply the hue rotation filter. The value is in degrees.
    ctx.filter = `hue-rotate(${hueRotationDegrees}deg)`;

    // Check if the image needs to be flipped horizontally
    if (flipHorizontally === 1) {
        // Translate the canvas context to the right edge
        ctx.translate(canvas.width, 0);
        // Scale the context negatively on the x-axis to create a horizontal flip
        ctx.scale(-1, 1);
    }

    // Draw the original image onto the canvas.
    // The transformations (flip) and filters (hue-rotate) will be applied
    // to the image as it is drawn.
    ctx.drawImage(originalImg, 0, 0, originalImg.width, originalImg.height);

    // Return the canvas element with the modified image
    return canvas;
}