Adult Content Image Filter

function processImage(originalImg, censorMethod = 'Blur and Warning', intensity = 25) {
    const canvas = document.createElement('canvas');
    const ctx = canvas.getContext('2d');
    canvas.width = originalImg.width;
    canvas.height = originalImg.height;

    const lowerMethod = String(censorMethod).toLowerCase();
    const effectIntensity = Math.max(1, Number(intensity) || 25);

    // Apply the censoring effect (Pixelation or Blur)
    if (lowerMethod.includes('pixel')) {
        const pixelSize = effectIntensity;
        const scaledW = Math.max(1, Math.ceil(canvas.width / pixelSize));
        const scaledH = Math.max(1, Math.ceil(canvas.height / pixelSize));
        
        const offCanvas = document.createElement('canvas');
        offCanvas.width = scaledW;
        offCanvas.height = scaledH;
        const offCtx = offCanvas.getContext('2d');
        offCtx.drawImage(originalImg, 0, 0, scaledW, scaledH);
        
        ctx.imageSmoothingEnabled = false;
        ctx.drawImage(offCanvas, 0, 0, scaledW, scaledH, 0, 0, canvas.width, canvas.height);
        ctx.imageSmoothingEnabled = true; // reset
    } else {
        // Blur approach
        ctx.save();
        ctx.filter = `blur(${effectIntensity}px)`;
        // Draw slightly larger to counteract edge transparency bleeding common in canvas blur filters
        ctx.drawImage(
            originalImg, 
            -effectIntensity * 2, 
            -effectIntensity * 2, 
            canvas.width + effectIntensity * 4, 
            canvas.height + effectIntensity * 4
        );
        ctx.restore();
    }

    // Apply a warning overlay if specified in the method
    if (lowerMethod.includes('warning') || lowerMethod.includes('overlay')) {
        // Apply dark translucent tint overlay
        ctx.fillStyle = 'rgba(0, 0, 0, 0.5)';
        ctx.fillRect(0, 0, canvas.width, canvas.height);
        
        ctx.textAlign = 'center';
        ctx.textBaseline = 'middle';
        
        const iconSize = Math.max(30, Math.min(canvas.width, canvas.height) * 0.15);
        const fontSize = Math.max(14, iconSize * 0.4);
        
        // Setup shadow for better text visibility against any background
        ctx.shadowColor = 'rgba(0, 0, 0, 0.8)';
        ctx.shadowBlur = 8;
        
        // Draw 18+ Icon
        ctx.font = `${iconSize}px Arial, sans-serif`;
        ctx.fillText('🔞', canvas.width / 2, canvas.height / 2 - fontSize * 1.5);
        
        // Draw Main Text
        ctx.fillStyle = '#ffffff';
        ctx.font = `bold ${fontSize}px Arial, sans-serif`;
        ctx.fillText('ADULT CONTENT', canvas.width / 2, canvas.height / 2 + iconSize * 0.1);
        
        // Draw Secondary Text
        ctx.font = `${fontSize * 0.6}px Arial, sans-serif`;
        ctx.fillText('Sensitive material', canvas.width / 2, canvas.height / 2 + iconSize * 0.1 + fontSize + 8);
        
        ctx.shadowBlur = 0; // reset
    }

    return canvas;
}