cc/base/switches.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/base/switches.h"
   6
   7 #include "base/command_line.h"
   8
   9 namespace cc {
  10 namespace switches {
  11
  12 // On platforms where checkerboards are used, prefer background colors instead
  13 // of checkerboards.
  14 const char kBackgroundColorInsteadOfCheckerboard[] =
  15     "background-color-instead-of-checkerboard";
  16
  17 // Disables LCD text.
  18 const char kDisableLCDText[] = "disable-lcd-text";
  19
  20 const char kDisableThreadedAnimation[] = "disable-threaded-animation";
  21
  22 // Disables layer-edge anti-aliasing in the compositor.
  23 const char kDisableCompositedAntialiasing[] =
  24     "disable-composited-antialiasing";
  25
  26 // Paint content on the main thread instead of the compositor thread.
  27 // Overrides the kEnableImplSidePainting flag.
  28 const char kDisableImplSidePainting[] = "disable-impl-side-painting";
  29
  30 // Enables LCD text.
  31 const char kEnableLCDText[] = "enable-lcd-text";
  32
  33 // Paint content on the compositor thread instead of the main thread.
  34 const char kEnableImplSidePainting[] = "enable-impl-side-painting";
  35
  36 const char kEnableTopControlsPositionCalculation[] =
  37     "enable-top-controls-position-calculation";
  38
  39 // For any layers that can get drawn directly to screen, draw them with the Skia
  40 // GPU backend.  Only valid with gl rendering + threaded compositing + impl-side
  41 // painting.
  42 const char kForceDirectLayerDrawing[] = "force-direct-layer-drawing";
  43
  44 // The height of the movable top controls.
  45 const char kTopControlsHeight[] = "top-controls-height";
  46
  47 // Percentage of the top controls need to be hidden before they will auto hide.
  48 const char kTopControlsHideThreshold[] = "top-controls-hide-threshold";
  49
  50 // Percentage of the top controls need to be shown before they will auto show.
  51 const char kTopControlsShowThreshold[] = "top-controls-show-threshold";
  52
  53 // Number of worker threads used to rasterize content.
  54 const char kNumRasterThreads[] = "num-raster-threads";
  55
  56 // Show metrics about overdraw in about:tracing recordings, such as the number
  57 // of pixels culled, and the number of pixels drawn, for each frame.
  58 const char kTraceOverdraw[] = "trace-overdraw";
  59
  60 // Re-rasters everything multiple times to simulate a much slower machine.
  61 // Give a scale factor to cause raster to take that many times longer to
  62 // complete, such as --slow-down-raster-scale-factor=25.
  63 const char kSlowDownRasterScaleFactor[] = "slow-down-raster-scale-factor";
  64
  65 // The scale factor for low resolution tile contents.
  66 const char kLowResolutionContentsScaleFactor[] =
  67     "low-resolution-contents-scale-factor";
  68
  69 // Max tiles allowed for each tilings interest area.
  70 const char kMaxTilesForInterestArea[] = "max-tiles-for-interest-area";
  71
  72 // The amount of unused resource memory compositor is allowed to keep around.
  73 const char kMaxUnusedResourceMemoryUsagePercentage[] =
  74     "max-unused-resource-memory-usage-percentage";
  75
  76 // Causes the compositor to render to textures which are then sent to the parent
  77 // through the texture mailbox mechanism.
  78 // Requires --enable-compositor-frame-message.
  79 const char kCompositeToMailbox[] = "composite-to-mailbox";
  80
  81 // Check that property changes during paint do not occur.
  82 const char kStrictLayerPropertyChangeChecking[] =
  83     "strict-layer-property-change-checking";
  84
  85 // Virtual viewport for fixed-position elements, scrollbars during pinch.
  86 const char kEnablePinchVirtualViewport[] = "enable-pinch-virtual-viewport";
  87
  88 const char kEnablePartialSwap[] = "enable-partial-swap";
  89 // Disable partial swap which is needed for some OpenGL drivers / emulators.
  90 const char kUIDisablePartialSwap[] = "ui-disable-partial-swap";
  91
  92 const char kEnablePerTilePainting[] = "enable-per-tile-painting";
  93 const char kUIEnablePerTilePainting[] = "ui-enable-per-tile-painting";
  94
  95 // Renders a border around compositor layers to help debug and study
  96 // layer compositing.
  97 const char kShowCompositedLayerBorders[] = "show-composited-layer-borders";
  98 const char kUIShowCompositedLayerBorders[] = "ui-show-layer-borders";
  99
 100 // Draws a FPS indicator
 101 const char kShowFPSCounter[] = "show-fps-counter";
 102 const char kUIShowFPSCounter[] = "ui-show-fps-counter";
 103
 104 // Show rects in the HUD around layers whose properties have changed.
 105 const char kShowPropertyChangedRects[] = "show-property-changed-rects";
 106 const char kUIShowPropertyChangedRects[] = "ui-show-property-changed-rects";
 107
 108 // Show rects in the HUD around damage as it is recorded into each render
 109 // surface.
 110 const char kShowSurfaceDamageRects[] = "show-surface-damage-rects";
 111 const char kUIShowSurfaceDamageRects[] = "ui-show-surface-damage-rects";
 112
 113 // Show rects in the HUD around the screen-space transformed bounds of every
 114 // layer.
 115 const char kShowScreenSpaceRects[] = "show-screenspace-rects";
 116 const char kUIShowScreenSpaceRects[] = "ui-show-screenspace-rects";
 117
 118 // Show rects in the HUD around the screen-space transformed bounds of every
 119 // layer's replica, when they have one.
 120 const char kShowReplicaScreenSpaceRects[] = "show-replica-screenspace-rects";
 121 const char kUIShowReplicaScreenSpaceRects[] =
 122     "ui-show-replica-screenspace-rects";
 123
 124 // Show rects in the HUD wherever something is known to be drawn opaque and is
 125 // considered occluding the pixels behind it.
 126 const char kShowOccludingRects[] = "show-occluding-rects";
 127 const char kUIShowOccludingRects[] = "ui-show-occluding-rects";
 128
 129 // Show rects in the HUD wherever something is not known to be drawn opaque and
 130 // is not considered to be occluding the pixels behind it.
 131 const char kShowNonOccludingRects[] = "show-nonoccluding-rects";
 132 const char kUIShowNonOccludingRects[] = "ui-show-nonoccluding-rects";
 133
 134 // Enable rasterizer that writes directly to GPU memory.
 135 const char kEnableMapImage[] = "enable-map-image";
 136
 137 // Disable rasterizer that writes directly to GPU memory.
 138 // Overrides the kEnableMapImage flag.
 139 const char kDisableMapImage[] = "disable-map-image";
 140
 141 // Prevents the layer tree unit tests from timing out.
 142 const char kCCLayerTreeTestNoTimeout[] = "cc-layer-tree-test-no-timeout";
 143
 144 // Disable textures using RGBA_4444 layout.
 145 const char kDisable4444Textures[] = "disable-4444-textures";
 146
 147 bool IsLCDTextEnabled() {
 148   const CommandLine* command_line = CommandLine::ForCurrentProcess();
 149   if (command_line->HasSwitch(cc::switches::kDisableLCDText))
 150     return false;
 151   else if (command_line->HasSwitch(cc::switches::kEnableLCDText))
 152     return true;
 153
 154 #if defined(OS_ANDROID)
 155   return false;
 156 #else
 157   return true;
 158 #endif
 159 }
 160
 161 bool IsImplSidePaintingEnabled() {
 162   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 163
 164   if (command_line.HasSwitch(cc::switches::kDisableImplSidePainting))
 165     return false;
 166   else if (command_line.HasSwitch(cc::switches::kEnableImplSidePainting))
 167     return true;
 168
 169 #if defined(OS_ANDROID)
 170   return true;
 171 #else
 172   return false;
 173 #endif
 174 }
 175
 176 bool IsMapImageEnabled() {
 177   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 178
 179   if (command_line.HasSwitch(cc::switches::kDisableMapImage))
 180     return false;
 181   else if (command_line.HasSwitch(cc::switches::kEnableMapImage))
 182     return true;
 183
 184   return false;
 185 }
 186
 187 }  // namespace switches
 188 }  // namespace cc