Add a --use-angle flag for selecting the ANGLE renderer.

ui/gl/test/egl_initialization_displays_unittest.cc

+// Copyright 2015 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.
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gl/gl_surface_egl.h"
+
+namespace {
+
+TEST(EGLInitializationDisplaysTest, DisableD3D11) {
+  scoped_ptr<base::CommandLine> command_line(
+      new base::CommandLine(base::CommandLine::NO_PROGRAM));
+
+  std::vector<gfx::DisplayType> displays;
+
+  // using --disable-d3d11 with the default --use-angle should never return
+  // D3D11.
+  command_line->AppendSwitch(switches::kDisableD3D11);
+  GetEGLInitDisplays(true, true, command_line.get(), &displays);
+  EXPECT_EQ(std::find(displays.begin(), displays.end(), gfx::ANGLE_D3D11),
+            displays.end());
+
+  // Specifically requesting D3D11 should always return it if the extension is
+  // available
+  command_line->AppendSwitchASCII(switches::kUseANGLE,
+                                  gfx::kANGLEImplementationD3D11Name);
+  displays.clear();
+  GetEGLInitDisplays(true, true, command_line.get(), &displays);
+  EXPECT_NE(std::find(displays.begin(), displays.end(), gfx::ANGLE_D3D11),
+            displays.end());
+  EXPECT_EQ(displays.size(), 1u);
+
+  // Specifically requesting D3D11 should not return D3D11 if the extension is
+  // not available
+  displays.clear();
+  GetEGLInitDisplays(false, true, command_line.get(), &displays);
+  EXPECT_EQ(std::find(displays.begin(), displays.end(), gfx::ANGLE_D3D11),
+            displays.end());
+}
+
+TEST(EGLInitializationDisplaysTest, SwiftShader) {
+  scoped_ptr<base::CommandLine> command_line(
+      new base::CommandLine(base::CommandLine::NO_PROGRAM));
+
+  std::vector<gfx::DisplayType> displays;
+
+  // If swiftshader is requested, only SWIFT_SHADER should be returned
+  command_line->AppendSwitchASCII(switches::kUseGL,
+                                  gfx::kGLImplementationSwiftShaderName);
+  displays.clear();
+  GetEGLInitDisplays(true, true, command_line.get(), &displays);
+  EXPECT_NE(std::find(displays.begin(), displays.end(), gfx::SWIFT_SHADER),
+            displays.end());
+  EXPECT_EQ(displays.size(), 1u);
+
+  // Even if there are other flags, swiftshader should take prescedence
+  command_line->AppendSwitchASCII(switches::kUseANGLE,
+                                  gfx::kANGLEImplementationD3D11Name);
+  displays.clear();
+  GetEGLInitDisplays(true, true, command_line.get(), &displays);
+  EXPECT_NE(std::find(displays.begin(), displays.end(), gfx::SWIFT_SHADER),
+            displays.end());
+  EXPECT_EQ(displays.size(), 1u);
+}
+
+TEST(EGLInitializationDisplaysTest, DefaultRenderers) {
+  scoped_ptr<base::CommandLine> command_line(
+      new base::CommandLine(base::CommandLine::NO_PROGRAM));
+
+  // Default without --use-angle flag
+  std::vector<gfx::DisplayType> default_no_flag_displays;
+  GetEGLInitDisplays(true, true, command_line.get(), &default_no_flag_displays);
+  EXPECT_FALSE(default_no_flag_displays.empty());
+
+  // Default with --use-angle flag
+  command_line->AppendSwitchASCII(switches::kUseANGLE,
+                                  gfx::kANGLEImplementationDefaultName);
+  std::vector<gfx::DisplayType> default_with_flag_displays;
+  GetEGLInitDisplays(true, true, command_line.get(),
+                     &default_with_flag_displays);
+  EXPECT_FALSE(default_with_flag_displays.empty());
+
+  // Make sure the same results are returned
+  EXPECT_EQ(default_no_flag_displays, default_with_flag_displays);
+}
+
+TEST(EGLInitializationDisplaysTest, NonDefaultRenderers) {
+  scoped_ptr<base::CommandLine> command_line(
+      new base::CommandLine(base::CommandLine::NO_PROGRAM));
+
+  std::vector<gfx::DisplayType> displays;
+
+  // WARP
+  command_line->AppendSwitchASCII(switches::kUseANGLE,
+                                  gfx::kANGLEImplementationWARPName);
+  displays.clear();
+  GetEGLInitDisplays(true, true, command_line.get(), &displays);
+  EXPECT_NE(std::find(displays.begin(), displays.end(), gfx::ANGLE_WARP),
+            displays.end());
+  EXPECT_EQ(displays.size(), 1u);
+
+  // OpenGL
+  command_line->AppendSwitchASCII(switches::kUseANGLE,
+                                  gfx::kANGLEImplementationOpenGLName);
+  displays.clear();
+  GetEGLInitDisplays(true, true, command_line.get(), &displays);
+  EXPECT_NE(std::find(displays.begin(), displays.end(), gfx::ANGLE_OPENGL),
+            displays.end());
+  EXPECT_EQ(displays.size(), 1u);
+
+  // OpenGLES
+  command_line->AppendSwitchASCII(switches::kUseANGLE,
+                                  gfx::kANGLEImplementationOpenGLESName);
+  displays.clear();
+  GetEGLInitDisplays(true, true, command_line.get(), &displays);
+  EXPECT_NE(std::find(displays.begin(), displays.end(), gfx::ANGLE_OPENGLES),
+            displays.end());
+  EXPECT_EQ(displays.size(), 1u);
+}
+
+TEST(EGLInitializationDisplaysTest, NoExtensions) {
+  scoped_ptr<base::CommandLine> command_line(
+      new base::CommandLine(base::CommandLine::NO_PROGRAM));
+
+  // With no angle platform extensions, only DEFAULT should be available
+  std::vector<gfx::DisplayType> displays;
+  GetEGLInitDisplays(false, false, command_line.get(), &displays);
+  EXPECT_NE(std::find(displays.begin(), displays.end(), gfx::DEFAULT),
+            displays.end());
+  EXPECT_EQ(displays.size(), 1u);
+}
+
+}  // namespace