Added telemetry pages for the canvas element.

tools/perf/page_sets/tough_canvas_cases/rendering_throughput/stroke_shapes.js

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+// This code in inspired by the canvas stroke shapes test on the animometer
+// benchmark (https://trac.webkit.org/export/HEAD/trunk/PerformanceTests/Animometer/developer.html).
+// Javascript code: https://pr.gg/animometer/tests/simple/resources/simple-canvas-paths.js
+
+var shape_types = ["quadratic", "bezier", "arc_to",
+                   "arc", "rectangle", "ellipse"];
+
+function CanvasStrokeShape() {
+  this.init = function(canvas_width, canvas_height) {
+    this.shape_type = shape_types[Math.floor(Math.random() * 6)];
+    this.color = get_random_color_string();
+
+    var max_size = Math.floor(Math.random() * 160) + 20;
+
+    var center = new Point(
+      Math.floor(Math.random() * canvas_width),
+      Math.floor(Math.random() * canvas_height));
+
+    this.p1 = new Point(
+      Math.floor(Math.random() * max_size) - max_size/2 + center.x,
+      Math.floor(Math.random() * max_size) - max_size/2 + center.y);
+
+    this.p2 = new Point(
+      Math.floor(Math.random() * max_size) - max_size/2 + center.x,
+      Math.floor(Math.random() * max_size) - max_size/2 + center.y);
+
+    this.p3 = new Point(
+      Math.floor(Math.random() * max_size) - max_size/2 + center.x,
+      Math.floor(Math.random() * max_size) - max_size/2 + center.y);
+
+    this.p4 = new Point(
+      Math.floor(Math.random() * max_size) - max_size/2 + center.x,
+      Math.floor(Math.random() * max_size) - max_size/2 + center.y);
+
+    switch(this.shape_type) {
+      case "quadratic":
+        this.width = Math.floor(Math.random() * 40) + 5;
+        break;
+
+      case "bezier":
+        this.width = Math.floor(Math.random() * 40) + 5;
+        break;
+
+      case "arc_to":
+        this.width = Math.floor(Math.random() * 40) + 5;
+        this.radius = Math.floor(Math.random() * 180) + 20;
+        break;
+
+      case "arc":
+        this.start_angle = Math.random() * 2 * Math.PI;
+        this.end_angle = Math.random() * 2 * Math.PI;
+        this.countclockwise = Math.floor(Math.random * 2);
+
+        this.width = Math.floor(Math.random() * 40) + 5;
+        this.radius = Math.floor(Math.random() * 180) + 20;
+        break;
+
+      case "rectangle":
+        this.width = Math.floor(Math.random() * 180) + 20;
+        this.height = Math.floor(Math.random() * 180) + 20;
+        this.line_width = Math.floor(Math.random() * 15);
+        break;
+
+      case "ellipse":
+        this.radius_w = Math.floor(Math.random() * 180) + 20;
+        this.radius_h = Math.floor(Math.random() * 180) + 20;
+
+        this.countclockwise = Math.floor(Math.random * 2);
+        this.line_width = Math.floor(Math.random() * 15);
+
+        this.rotation = Math.random() * 2 * Math.PI;
+        this.start_angle = Math.random() * 2 * Math.PI;
+        this.end_angle = Math.random() * 2 * Math.PI;
+
+        break;
+    }
+  }
+
+  this.draw_quadratic_segment = function(context) {
+    context.strokeStyle = this.color;
+    context.lineWidth = this.width;
+    context.beginPath();
+    context.moveTo(this.p1.x, this.p1.y);
+    context.quadraticCurveTo(this.p2.x, this.p2.y, this.p3.x, this.p3.y);
+    context.stroke();
+  }
+
+  this.draw_bezier_segment = function(context) {
+    context.strokeStyle = this.color;
+    context.lineWidth = this.width;
+    context.beginPath();
+    context.moveTo(this.p1.x, this.p1.y);
+    context.bezierCurveTo(this.p2.x, this.p2.y, this.p3.x,
+                          this.p3.y, this.p4.x, this.p4.y);
+    context.stroke()
+  }
+
+  this.draw_arc_to_segment = function(context) {
+    context.strokeStyle = this.color;
+    context.lineWidth = this.width;
+    context.beginPath();
+    context.moveTo(this.p1.x, this.p1.y);
+    context.arcTo(this.p2.x, this.p2.y, this.p3.x, this.p3.y, this.radius);
+    context.stroke();
+  }
+
+  this.draw_arc_segment = function(context) {
+    context.strokeStyle = this.color;
+    context.lineWidth = this.width;
+    context.beginPath();
+    context.arc(this.p1.x, this.p1.y, this.radius, this.start_angle,
+                this.end_angle, this.counterclockwise);
+    context.stroke();
+  }
+
+  this.draw_rectangle = function(context) {
+    context.strokeStyle = this.color;
+    context.lineWidth = this.line_width;
+    context.beginPath();
+    context.rect(this.p1.x, this.p1.y, this.width, this.height);
+    context.stroke();
+  }
+
+  this.draw_ellipse = function(context) {
+    context.strokeStyle = this.color;
+    context.lineWidth = this.line_width;
+    context.beginPath();
+    context.ellipse(this.p1.x, this.p1.y, this.radius_w, this.radius_h,
+                    this.rotation, this.start_angle, this.end_angle,
+                    this.counterclockwise);
+    context.stroke();
+  }
+
+  this.draw = function(context) {
+    switch(this.shape_type) {
+      case "quadratic":
+        this.draw_quadratic_segment(context);
+        break;
+      case "bezier":
+        this.draw_bezier_segment(context);
+        break;
+      case "arc_to":
+        this.draw_arc_to_segment(context);
+        break;
+      case "arc":
+        this.draw_arc_segment(context);
+        break;
+      case "rectangle":
+        this.draw_rectangle(context);
+        break;
+      case "ellipse":
+        this.draw_ellipse(context);
+        break;
+    }
+  }
+}
+
+var stage_stroke_shapes = (function() {
+  var stage = {};
+  var shapes;
+
+  stage.init = function(number_shapes, canvas_width, canvas_height) {
+    shapes = []
+    for (var i = 0; i < number_shapes; i++) {
+      var shape = new CanvasStrokeShape();
+      shape.init(canvas_width, canvas_height);
+      shapes.push(shape);
+    }
+  };
+
+  stage.draw = function(context) {
+    for (var i = 0; i < shapes.length; i++) {
+      shapes[i].draw(context);
+    }
+  };
+
+  return stage;
+})();
+
+