Open source

scripts/resize.js

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+// var sharp=require('sharp');
+
+// sharp(process.env.HOME+'/thegame/scripts/tileB_desert.png')
+// .resize(384,384,{kernel:sharp.kernel.cubic,interpolator:sharp.interpolator.bilinear}) //kernel:"cubic", interpolator:"nearest",
+// .toFile(process.env.HOME+'/thegame/scripts/tileB_desert2.png', function(err) {
+// // output.jpg is a 300 pixels wide and 200 pixels high image
+// // containing a scaled and cropped version of input.jpg
+// });
+// doesn't work, loses quality
+
+
+var fs = require('fs'),
+	PNG = require('pngjs').PNG;
+
+fs.createReadStream('vampire.png')
+	.pipe(new PNG({
+		filterType: 4
+	}))
+	.on('parsed', function() {
+
+		var output=new PNG({width:this.width/2,height:this.height/2,filterType:4})
+
+		for (var y = 0; y < this.height/2; y++) {
+			for (var x = 0; x < this.width/2; x++) {
+				var idx = (output.width * y + x) << 2;
+				var idx2 = (this.width * 2*y + 2*x) << 2;
+				output.data[idx]=this.data[idx2];
+				output.data[idx+1]=this.data[idx2+1];
+				output.data[idx+2]=this.data[idx2+2];
+				output.data[idx+3]=this.data[idx2+3];
+			}
+		}
+
+		output.pack().pipe(fs.createWriteStream('vampire2.png'));
+	});