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 9namespace cc { 10namespace switches { 11 12// On platforms where checkerboards are used, prefer background colors instead 13// of checkerboards. 14const char kBackgroundColorInsteadOfCheckerboard[] = 15 "background-color-instead-of-checkerboard"; 16 17// Disables LCD text. 18const char kDisableLCDText[] = "disable-lcd-text"; 19 20const char kDisableThreadedAnimation[] = "disable-threaded-animation"; 21 22// Disables layer-edge anti-aliasing in the compositor. 23const char kDisableCompositedAntialiasing[] = 24 "disable-composited-antialiasing"; 25 26// Paint content on the main thread instead of the compositor thread. 27// Overrides the kEnableImplSidePainting flag. 28const char kDisableImplSidePainting[] = "disable-impl-side-painting"; 29 30// Enables LCD text. 31const char kEnableLCDText[] = "enable-lcd-text"; 32 33// Paint content on the compositor thread instead of the main thread. 34const char kEnableImplSidePainting[] = "enable-impl-side-painting"; 35 36const char kEnableTopControlsPositionCalculation[] = 37 "enable-top-controls-position-calculation"; 38 39// Allow heuristics to determine when a layer tile should be drawn with 40// the Skia GPU backend. Only valid with GPU accelerated compositing + 41// impl-side painting. 42const char kEnableGPURasterization[] = "enable-gpu-rasterization"; 43 44// The height of the movable top controls. 45const char kTopControlsHeight[] = "top-controls-height"; 46 47// Percentage of the top controls need to be hidden before they will auto hide. 48const char kTopControlsHideThreshold[] = "top-controls-hide-threshold"; 49 50// Percentage of the top controls need to be shown before they will auto show. 51const char kTopControlsShowThreshold[] = "top-controls-show-threshold"; 52 53// Number of worker threads used to rasterize content. 54const 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. 58const 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. 63const char kSlowDownRasterScaleFactor[] = "slow-down-raster-scale-factor"; 64 65// Max tiles allowed for each tilings interest area. 66const char kMaxTilesForInterestArea[] = "max-tiles-for-interest-area"; 67 68// The amount of unused resource memory compositor is allowed to keep around. 69const char kMaxUnusedResourceMemoryUsagePercentage[] = 70 "max-unused-resource-memory-usage-percentage"; 71 72// Causes the compositor to render to textures which are then sent to the parent 73// through the texture mailbox mechanism. 74// Requires --enable-compositor-frame-message. 75const char kCompositeToMailbox[] = "composite-to-mailbox"; 76 77// Check that property changes during paint do not occur. 78const char kStrictLayerPropertyChangeChecking[] = 79 "strict-layer-property-change-checking"; 80 81// Virtual viewport for fixed-position elements, scrollbars during pinch. 82const char kEnablePinchVirtualViewport[] = "enable-pinch-virtual-viewport"; 83 84const char kEnablePartialSwap[] = "enable-partial-swap"; 85// Disable partial swap which is needed for some OpenGL drivers / emulators. 86const char kUIDisablePartialSwap[] = "ui-disable-partial-swap"; 87 88const char kEnablePerTilePainting[] = "enable-per-tile-painting"; 89const char kUIEnablePerTilePainting[] = "ui-enable-per-tile-painting"; 90 91// Renders a border around compositor layers to help debug and study 92// layer compositing. 93const char kShowCompositedLayerBorders[] = "show-composited-layer-borders"; 94const char kUIShowCompositedLayerBorders[] = "ui-show-layer-borders"; 95 96// Draws a FPS indicator 97const char kShowFPSCounter[] = "show-fps-counter"; 98const char kUIShowFPSCounter[] = "ui-show-fps-counter"; 99 100// Renders a border that represents the bounding box for the layer's animation. 101const char kShowLayerAnimationBounds[] = "show-layer-animation-bounds"; 102const char kUIShowLayerAnimationBounds[] = "ui-show-layer-animation-bounds"; 103 104// Show rects in the HUD around layers whose properties have changed. 105const char kShowPropertyChangedRects[] = "show-property-changed-rects"; 106const 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. 110const char kShowSurfaceDamageRects[] = "show-surface-damage-rects"; 111const char kUIShowSurfaceDamageRects[] = "ui-show-surface-damage-rects"; 112 113// Show rects in the HUD around the screen-space transformed bounds of every 114// layer. 115const char kShowScreenSpaceRects[] = "show-screenspace-rects"; 116const 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. 120const char kShowReplicaScreenSpaceRects[] = "show-replica-screenspace-rects"; 121const 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. 126const char kShowOccludingRects[] = "show-occluding-rects"; 127const 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. 131const char kShowNonOccludingRects[] = "show-nonoccluding-rects"; 132const char kUIShowNonOccludingRects[] = "ui-show-nonoccluding-rects"; 133 134// Enable rasterizer that writes directly to GPU memory. 135const char kEnableMapImage[] = "enable-map-image"; 136 137// Disable rasterizer that writes directly to GPU memory. 138// Overrides the kEnableMapImage flag. 139const char kDisableMapImage[] = "disable-map-image"; 140 141// Prevents the layer tree unit tests from timing out. 142const char kCCLayerTreeTestNoTimeout[] = "cc-layer-tree-test-no-timeout"; 143 144// Makes pixel tests write their output instead of read it. 145const char kCCRebaselinePixeltests[] = "cc-rebaseline-pixeltests"; 146 147// Disable textures using RGBA_4444 layout. 148const char kDisable4444Textures[] = "disable-4444-textures"; 149 150// Disable touch hit testing in the compositor. 151const char kDisableCompositorTouchHitTesting[] = 152 "disable-compositor-touch-hit-testing"; 153 154bool IsLCDTextEnabled() { 155 const CommandLine* command_line = CommandLine::ForCurrentProcess(); 156 if (command_line->HasSwitch(switches::kDisableLCDText)) 157 return false; 158 else if (command_line->HasSwitch(switches::kEnableLCDText)) 159 return true; 160 161#if defined(OS_ANDROID) 162 return false; 163#else 164 return true; 165#endif 166} 167 168namespace { 169bool CheckImplSidePaintingStatus() { 170 const CommandLine& command_line = *CommandLine::ForCurrentProcess(); 171 172 if (command_line.HasSwitch(switches::kDisableImplSidePainting)) 173 return false; 174 else if (command_line.HasSwitch(switches::kEnableImplSidePainting)) 175 return true; 176 177#if defined(OS_ANDROID) 178 return true; 179#else 180 return false; 181#endif 182} 183 184bool CheckGPURasterizationStatus() { 185 const CommandLine& command_line = *CommandLine::ForCurrentProcess(); 186 return command_line.HasSwitch(switches::kEnableGPURasterization); 187} 188 189} // namespace 190 191bool IsImplSidePaintingEnabled() { 192 static bool enabled = CheckImplSidePaintingStatus(); 193 return enabled; 194} 195 196bool IsGPURasterizationEnabled() { 197 static bool enabled = CheckGPURasterizationStatus(); 198 return enabled; 199} 200 201bool IsMapImageEnabled() { 202 const CommandLine& command_line = *CommandLine::ForCurrentProcess(); 203 204 if (command_line.HasSwitch(switches::kDisableMapImage)) 205 return false; 206 else if (command_line.HasSwitch(switches::kEnableMapImage)) 207 return true; 208 209 return false; 210} 211 212} // namespace switches 213} // namespace cc 214