Pass fillRect through to canvas.js.

samples/html5Canvas/src/canvas/js/canvas.js

@@ -30,6 +30,9 @@ konan.libraries.push ({          // This one will be auto generated.
         knjs_fillRect: function(arena, obj, x1, y1, width, height) {
             kotlinObject(arena, obj).fillRect(x1, y1, width, height);
         },
+        knjs_fillText: function(arena, obj, textPtr, textLength, x, y, maxWidth) {
+            kotlinObject(arena, obj).fillText(toUTF16String(textPtr, textLength), x, y, maxWidth);
+        },
         knjs_fill: function(arena, obj) {
             kotlinObject(arena, obj).fill();
         },

samples/html5Canvas/src/canvas/kotlin/canvas.kt

@@ -30,6 +30,8 @@ external public fun knjs_lineTo(arena: Int, obj: Int, x: Int, y: Int): Int;
 
 @SymbolName("knjs_fillRect")
 external public fun knjs_fillRect(arena: Int, obj: Int, x1: Int, y1: Int, width: Int, height: Int)
+@SymbolName("knjs_fillText")
+external public fun knjs_fillText(arena: Int, obj: Int, textPtr: Int, textWidth: Int, x: Int, y: Int, maxWidth: Int)
 
 @SymbolName("knjs_fill")
 external public fun knjs_fill(arena: Int, obj: Int)
@@ -97,6 +99,9 @@ open class Context(arena: Int, index: Int): JsValue(arena, index) {
     fun fillRect(x: Int, y: Int, width: Int, height: Int) {
         knjs_fillRect(this.arena, this.index, x, y, width, height)
     }
+    fun fillText(text: String, x: Int, y: Int, maxWidth: Int) {
+        knjs_fillText(this.arena, this.index, stringPointer(text), stringLengthBytes(text), x, y, maxWidth)
+    }
     fun fill() {
         knjs_fill(this.arena, this.index)
     }