Implements core logic for Pixel Canvas

ui/compositor/compositor_switches.cc

 // Copyright (c) 2012 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 "ui/compositor/compositor_switches.h"
 
 #include "base/command_line.h"
 
 namespace switches {
 
@@ skipping 14 matching lines @@
 const char kUIDisablePartialSwap[] = "ui-disable-partial-swap";
 
 const char kUIEnableRGBA4444Textures[] = "ui-enable-rgba-4444-textures";
 
 const char kUIEnableZeroCopy[] = "ui-enable-zero-copy";
 
 const char kUIShowPaintRects[] = "ui-show-paint-rects";
 
 const char kUISlowAnimations[] = "ui-slow-animations";
 
+// If enabled, all draw commands recorded on canvas are done in pixel aligned
+// measurements. This also enables scaling of all elements in views and layers
+// to be done via corner points. See https://goo.gl/Dqig5s
+const char kEnablePixelCanvasRecording[] = "enable-pixel-canvas-recording";
+
 }  // namespace switches
 
 namespace ui {
+namespace {
+bool kEnablePixelCanvasForTesting = false;

[danakj, 2017/07/25 17:58:56]

remove

[malaykeshav, 2017/07/25 22:57:57]

Done

+}
 
 bool IsUIZeroCopyEnabled() {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
   return command_line.HasSwitch(switches::kUIEnableZeroCopy);
 }
 
+bool IsPixelCanvasRecordingEnabled() {
+  static const bool kIsPixelCanvasRecordingEnabled =
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnablePixelCanvasRecording);
+  return kIsPixelCanvasRecordingEnabled || kEnablePixelCanvasForTesting;
+}
+
 }  // namespace ui