Initial commit

index.js

@@ -0,0 +1,22 @@
+const spawn = require('child_process').spawn;
+
+function readFromRegion(frame: Buffer, x: int, y: int, width: int, height: int) {
+	const convert = spawn('convert', ['-', '-negate', '-crop', `${width}x${height}+${x}+${y}`, '-'])
+	const result = new Buffer(512 * 1024)
+	let resultSize = 0
+
+	convert.stdout.on('data', (data) => {
+		if (data.length + resultSize > result.length) {
+			// Buffer not big enough
+		} else {
+			resultSize += data.length
+			data.copy(result)
+		}
+	});
+
+	convert.on('exit', (code) => {
+
+	});
+
+	convert.stdin.write(frame)
+}