cc: Trigger GPU rasterization based on a per-layer hint

cc/base/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 "cc/base/switches.h"
 
+#include <string>
+
 #include "base/command_line.h"
 
 namespace cc {
 namespace switches {
 
 // On platforms where checkerboards are used, prefer background colors instead
 // of checkerboards.
 const char kBackgroundColorInsteadOfCheckerboard[] =
     "background-color-instead-of-checkerboard";
 
-// Disables LCD text.
-const char kDisableLCDText[] = "disable-lcd-text";
-
 const char kDisableThreadedAnimation[] = "disable-threaded-animation";
 
 // Disables layer-edge anti-aliasing in the compositor.
 const char kDisableCompositedAntialiasing[] =
     "disable-composited-antialiasing";
 
-// Paint content on the main thread instead of the compositor thread.
-// Overrides the kEnableImplSidePainting flag.
-const char kDisableImplSidePainting[] = "disable-impl-side-painting";
-
-// Enables LCD text.
-const char kEnableLCDText[] = "enable-lcd-text";
-
-// Paint content on the compositor thread instead of the main thread.
-const char kEnableImplSidePainting[] = "enable-impl-side-painting";
-
 const char kEnableTopControlsPositionCalculation[] =
     "enable-top-controls-position-calculation";
 
-// Allow heuristics to determine when a layer tile should be drawn with
-// the Skia GPU backend.  Only valid with GPU accelerated compositing +
-// impl-side painting.
-const char kEnableGPURasterization[] = "enable-gpu-rasterization";
-
-// Disable GPU rasterization, i.e. rasterize on the CPU only.
-// Overrides the kEnableGPURasterization flag.
-const char kDisableGPURasterization[] = "disable-gpu-rasterization";
-
 // The height of the movable top controls.
 const char kTopControlsHeight[] = "top-controls-height";
 
 // Percentage of the top controls need to be hidden before they will auto hide.
 const char kTopControlsHideThreshold[] = "top-controls-hide-threshold";
 
 // Percentage of the top controls need to be shown before they will auto show.
 const char kTopControlsShowThreshold[] = "top-controls-show-threshold";
 
 // Show metrics about overdraw in about:tracing recordings, such as the number
@@ skipping 66 matching lines @@
 // Show rects in the HUD wherever something is known to be drawn opaque and is
 // considered occluding the pixels behind it.
 const char kShowOccludingRects[] = "show-occluding-rects";
 const char kUIShowOccludingRects[] = "ui-show-occluding-rects";
 
 // Show rects in the HUD wherever something is not known to be drawn opaque and
 // is not considered to be occluding the pixels behind it.
 const char kShowNonOccludingRects[] = "show-nonoccluding-rects";
 const char kUIShowNonOccludingRects[] = "ui-show-nonoccluding-rects";
 
-// Enable rasterizer that writes directly to GPU memory.
-const char kEnableMapImage[] = "enable-map-image";
-
-// Disable rasterizer that writes directly to GPU memory.
-// Overrides the kEnableMapImage flag.
-const char kDisableMapImage[] = "disable-map-image";
-
 // Prevents the layer tree unit tests from timing out.
 const char kCCLayerTreeTestNoTimeout[] = "cc-layer-tree-test-no-timeout";
 
 // Makes pixel tests write their output instead of read it.
 const char kCCRebaselinePixeltests[] = "cc-rebaseline-pixeltests";
 
 // Disable textures using RGBA_4444 layout.
 const char kDisable4444Textures[] = "disable-4444-textures";
 
 // Disable touch hit testing in the compositor.
 const char kDisableCompositorTouchHitTesting[] =
     "disable-compositor-touch-hit-testing";
 
-bool IsLCDTextEnabled() {
-  const CommandLine* command_line = CommandLine::ForCurrentProcess();
-  if (command_line->HasSwitch(switches::kDisableLCDText))
-    return false;
-  else if (command_line->HasSwitch(switches::kEnableLCDText))
-    return true;
-
-#if defined(OS_ANDROID)
-  return false;
-#else
-  return true;
-#endif
-}
-
-bool IsGpuRasterizationEnabled() {
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
-
-  if (command_line.HasSwitch(switches::kDisableGPURasterization))
-    return false;
-  else if (command_line.HasSwitch(switches::kEnableGPURasterization))
-    return true;
-
-  return false;
-}
-
-bool IsImplSidePaintingEnabled() {
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
-
-  if (command_line.HasSwitch(switches::kDisableImplSidePainting))
-    return false;
-  else if (command_line.HasSwitch(switches::kEnableImplSidePainting))
-    return true;
-
-#if defined(OS_ANDROID)
-  return true;
-#else
-  return false;
-#endif
-}
-
-bool IsMapImageEnabled() {
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
-
-  if (command_line.HasSwitch(switches::kDisableMapImage))
-    return false;
-  else if (command_line.HasSwitch(switches::kEnableMapImage))
-    return true;
-
-  return false;
-}
-
 }  // namespace switches
 }  // namespace cc