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

content/public/common/content_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 "content/public/common/content_switches.h"
 
 #include "base/command_line.h"
 
 namespace switches {
 
@@ skipping 210 matching lines @@
 const char kDisableGpuWatchdog[]            = "disable-gpu-watchdog";
 
 // Suppresses hang monitor dialogs in renderer processes.  This may allow slow
 // unload handlers on a page to prevent the tab from closing, but the Task
 // Manager can be used to terminate the offending process in this case.
 const char kDisableHangMonitor[]            = "disable-hang-monitor";
 
 // Disable the RenderThread's HistogramCustomizer.
 const char kDisableHistogramCustomizer[]    = "disable-histogram-customizer";
 
+// Paint content on the main thread instead of the compositor thread.
+// Overrides the kEnableImplSidePainting flag.
+const char kDisableImplSidePainting[]       = "disable-impl-side-painting";
+
 // Prevent Java from running.
 const char kDisableJava[]                   = "disable-java";
 
 // Don't execute JavaScript (browser JS like the new tab page still runs).
 const char kDisableJavaScript[]             = "disable-javascript";
 
 // Don't kill a child process when it sends a bad IPC message.  Apart
 // from testing, it is a bad idea from a security perspective to enable
 // this switch.
 const char kDisableKillAfterBadIPC[]        = "disable-kill-after-bad-ipc";
 
 // Disables prefixed Encrypted Media API (e.g. webkitGenerateKeyRequest()).
 const char kDisablePrefixedEncryptedMedia[] =
     "disable-prefixed-encrypted-media";
 
+// Disables LCD text.
+const char kDisableLCDText[]                = "disable-lcd-text";
+
 // Disable LocalStorage.
 const char kDisableLocalStorage[]           = "disable-local-storage";
 
 // Force logging to be disabled.  Logging is enabled by default in debug
 // builds.
 const char kDisableLogging[]                = "disable-logging";
 
+// Disable rasterizer that writes directly to GPU memory.
+// Overrides the kEnableMapImage flag.
+const char kDisableMapImage[]               = "disable-map-image";
+
 // Disables overlay scrollbars on Aura or Linux. Does nothing on Mac.
 const char kDisableOverlayScrollbar[]       = "disable-overlay-scrollbar";
 
 // Disable Pepper3D.
 const char kDisablePepper3d[]               = "disable-pepper-3d";
 
 // Disables compositor-accelerated touch-screen pinch gestures.
 const char kDisablePinch[]                  = "disable-pinch";
 
 // Prevent plugins from running.
@@ skipping 88 matching lines @@
 // Enables accelerated compositing for backgrounds of root layers with
 // background-attachment: fixed. Requires kForceCompositingMode.
 const char kEnableAcceleratedFixedRootBackground[] =
     "enable-accelerated-fixed-root-background";
 
 // Enables accelerated compositing for overflow scroll. Promotes eligible
 // overflow:scroll elements to layers to enable accelerated scrolling for them.
 const char kEnableAcceleratedOverflowScroll[] =
     "enable-accelerated-overflow-scroll";
 
+// Enables LCD text.
+const char kEnableLCDText[]                 = "enable-lcd-text";
+
 // Enables experimental feature that maps multiple RenderLayers to
 // one composited layer to avoid pathological layer counts.
 const char kEnableLayerSquashing[] =
     "enable-layer-squashing";
 
 // Enables accelerated compositing for scrollable frames for accelerated
 // scrolling for them. Requires kForceCompositingMode.
 const char kEnableAcceleratedScrollableFrames[] =
      "enable-accelerated-scrollable-frames";
 
@@ skipping 89 matching lines @@
 // Enables the DirectWrite font rendering system on windows.
 const char kEnableDirectWrite[]             = "enable-direct-write";
 
 // Use high resolution timers for TimeTicks.
 const char kEnableHighResolutionTime[]      = "enable-high-resolution-time";
 #endif
 
 // Enable HTML Imports
 extern const char kEnableHTMLImports[]      = "enable-html-imports";
 
+// Paint content on the compositor thread instead of the main thread.
+const char kEnableImplSidePainting[]        = "enable-impl-side-painting";
+
 // Enables support for inband text tracks in media content.
 const char kEnableInbandTextTracks[]        = "enable-inband-text-tracks";
 
 // Force logging to be enabled.  Logging is disabled by default in release
 // builds.
 const char kEnableLogging[]                 = "enable-logging";
 
+// Enable rasterizer that writes directly to GPU memory.
+const char kEnableMapImage[]                = "enable-map-image";
+
 // Enables the memory benchmarking extension
 const char kEnableMemoryBenchmarking[]      = "enable-memory-benchmarking";
 
 // On Windows, converts the page to the currently-installed monitor profile.
 // This does NOT enable color management for images. The source is still
 // assumed to be sRGB.
 const char kEnableMonitorProfile[]          = "enable-monitor-profile";
 
 // Enables use of cache if offline, even if it's stale
 const char kEnableOfflineCacheAccess[]      = "enable-offline-cache-access";
@@ skipping 271 matching lines @@
 // Runs each set of script-connected tabs (i.e., a BrowsingInstance) in its own
 // renderer process.  We default to using a renderer process for each
 // site instance (i.e., group of pages from the same registered domain with
 // script connections to each other).
 const char kProcessPerTab[]                 = "process-per-tab";
 
 // The value of this switch determines whether the process is started as a
 // renderer or plugin host.  If it's empty, it's the browser.
 const char kProcessType[]                   = "type";
 
+// Select the location used for drawing layer tiles. Allowed values are
+// 'cpu' (rasterize on the CPU only), 'gpu' (always use the Skia GPU backend
+// for rasterization), and 'hybrid' (use hints and heuristics to determine
+// when to rasterize using the Skia GPU backend).
+const char kRasterizationSite[]             = "rasterization-site";
+
 // Enables more web features over insecure connections. Designed to be used
 // for testing purposes only.
 const char kReduceSecurityForTesting[]      = "reduce-security-for-testing";
 
 // Register Pepper plugins (see pepper_plugin_list.cc for its format).
 const char kRegisterPepperPlugins[]         = "register-pepper-plugins";
 
 // Enables remote debug over HTTP on the specified port.
 const char kRemoteDebuggingPort[]           = "remote-debugging-port";
 
@@ skipping 274 matching lines @@
 #endif
 
 #if defined(OS_POSIX)
 // Causes the child processes to cleanly exit via calling exit().
 const char kChildCleanExit[]                = "child-clean-exit";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches