Data commit

Task/Grayscale-image/Wren/grayscale-image.wren

@@ -0,0 +1,40 @@
+import "graphics" for Canvas, Color, ImageData
+import "dome" for Window
+
+class PercentageDifference {
+    construct new(width, height, image1, image2) {
+        Window.title = "Grayscale Image"
+        Window.resize(width, height)
+        Canvas.resize(width, height)
+        _image1 = image1
+        _image2 = image2
+        _img1 = ImageData.loadFromFile(image1)
+        _img2 = ImageData.create(image2, _img1.width, _img1.height)
+    }
+
+    init() {
+        toGrayScale()
+        // display images side by side
+        _img1.draw(0, 0)
+        _img2.draw(550, 0)
+        Canvas.print(_image1, 200, 525, Color.white)
+        Canvas.print(_image2, 750, 525, Color.white)
+    }
+
+    toGrayScale() {
+        for (x in 0..._img1.width) {
+            for (y in 0..._img1.height) {
+                var c1 = _img1.pget(x, y)
+                var lumin = (0.2126 * c1.r + 0.7152 * c1.g + 0.0722 * c1.b).floor
+                var c2 = Color.rgb(lumin, lumin,lumin, c1.a)
+                _img2.pset(x, y, c2)
+            }
+        }
+    }
+
+    update() {}
+
+    draw(alpha) {}
+}
+
+var Game = PercentageDifference.new(1100, 550, "Lenna100.jpg", "Lenna-grayscale.jpg")