// White circle paint = new SKPaint
// Write to PNG const out = fs.createWriteStream('node_canvas_full_847.png'); const stream = canvas.createPNGStream(); stream.pipe(out); out.on('finish', () => console.log('✅ Canvas image saved')); – node-canvas uses cairo under the hood; ensure your host has sufficient shared memory ( /dev/shm ) if you scale to > 10 k px. 5.4 C# – SkiaSharp (Cross‑Platform) using SkiaSharp; using System.IO; 847 create an image full
W, H = 847, 847 # Create an empty BGR image (3 channels) img = np.zeros((H, W, 3), dtype=np.uint8) // White circle paint = new SKPaint //
# Fill with gradient (BGR order) for y in range(H): img[y, :, 0] = int(255 * (y / H)) # Blue channel img[y, :, 1] = 128 # Green channel img[y, :, 2] = int(255 * (1 - y / H)) # Red channel const stream = canvas.createPNGStream()
# 1️⃣ Define size and mode WIDTH, HEIGHT = 847, 847 MODE = "RGBA" # 4‑bytes per pixel