Re-enable IOSurface Canvas2D.

content/test/data/gpu/pixel_webgl_util.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.
+//
+// READ BEFORE UPDATING:
+// If this file is updated, make sure to increment the "revision" value of any
+// tests that use this file in content/test/gpu/page_sets/pixel_tests.py. This
+// will ensure that the baseline images are regenerated on the next run.
+
+var vertexShader = [
+  "attribute vec3 pos;",
+  "void main(void)",
+  "{",
+  "  gl_Position = vec4(pos, 1.0);",
+  "}"
+].join("\n");
+
+var fragmentShader = [
+  "precision mediump float;",
+  "void main(void)",
+  "{",
+  "  gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);",
+  "}"
+].join("\n");
+
+function initGL(canvas)
+{
+  var gl = null;
+  try {
+    gl = canvas.getContext("experimental-webgl");
+  } catch (e) {}
+  if (!gl) {
+    try {
+      gl = canvas.getContext("webgl");
+    } catch (e) { }
+  }
+  return gl;
+}
+
+function setupShader(gl, source, type) {
+  var shader = gl.createShader(type);
+  gl.shaderSource(shader, source);
+  gl.compileShader(shader);
+  if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS))
+    return null;
+  return shader;
+}
+
+function setupProgram(gl, vs_id, fs_id) {
+  var vs = setupShader(gl, vertexShader, gl.VERTEX_SHADER);
+  var fs = setupShader(gl, fragmentShader, gl.FRAGMENT_SHADER);
+  if (!vs || !fs)
+    return null;
+  var program = gl.createProgram();
+  gl.attachShader(program, vs);
+  gl.attachShader(program, fs);
+  gl.linkProgram(program);
+  if (!gl.getProgramParameter(program, gl.LINK_STATUS))
+    return null;
+  gl.useProgram(program);
+  return program;
+}
+
+function setupBuffer(gl) {
+  var buffer = gl.createBuffer();
+  gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
+  var vertexData = [
+    0.0, 0.6, 0.0,  // Vertex 1 position
+    -0.6, -0.6, 0.0,  // Vertex 2 position
+    0.6, -0.6, 0.0,  // Vertex 3 position
+  ];
+  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertexData), gl.STATIC_DRAW);
+}
+
+function setup(gl) {
+  var program = setupProgram(gl, "shader-vs", "shader-fs");
+  if (!program)
+    return false;
+  var posAttr = gl.getAttribLocation(program, "pos");
+  gl.enableVertexAttribArray(posAttr);
+  setupBuffer(gl);
+  var stride = 3 * Float32Array.BYTES_PER_ELEMENT;
+  gl.vertexAttribPointer(posAttr, 3, gl.FLOAT, false, stride, 0);
+  gl.clearColor(0.0, 0.0, 0.0, 0.0);
+  gl.viewport(0, 0, 200, 200);
+  gl.disable(gl.DEPTH_TEST);
+  if (gl.getError() != gl.NO_ERROR)
+    return false;
+  return true;
+}
+
+function drawTriangle(gl) {
+  gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+  gl.drawArrays(gl.TRIANGLES, 0, 3);
+}