847 Create An Image Full ((free))

const W = 847; const H = 847; const canvas = createCanvas(W, H); const ctx = canvas.getContext('2d');

W, H = 847, 847 # Create an empty BGR image (3 channels) img = np.zeros((H, W, 3), dtype=np.uint8)

// Full‑image gradient var paint = new SKPaint 847 create an image full

// Create a new document that fills the canvas completely var doc = app.documents.add(W, H, 72, "FullImage847", NewDocumentMode.RGB, Document

// 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; const W = 847; const H = 847;

Shader = SKShader.CreateLinearGradient( new SKPoint(0, 0), new SKPoint(W, H), new[] SKColors.CornflowerBlue, SKColors.OrangeRed , null, SKShaderTileMode.Clamp) ; canvas.DrawRect(new SKRect(0, 0, W, H), paint);

// Centered white circle ctx.strokeStyle = '#FFF'; ctx.lineWidth = 5; ctx.beginPath(); ctx.arc(W/2, H/2, W/4, 0, Math.PI * 2); ctx.stroke(); const W = 847

# 2️⃣ Allocate full canvas (filled with transparent black) canvas = Image.new(MODE, (WIDTH, HEIGHT), (0, 0, 0, 0))