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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/viz/common/features.h"
#include <algorithm>
#include <string>
#include <vector>
#include "base/command_line.h"
#include "base/feature_list.h"
#include "base/logging.h"
#include "base/metrics/field_trial_params.h"
#include "base/strings/string_split.h"
#include "base/system/sys_info.h"
#include "build/build_config.h"
#include "components/viz/common/switches.h"
#include "components/viz/common/viz_utils.h"
#include "gpu/config/gpu_driver_bug_workaround_type.h"
#include "gpu/config/gpu_finch_features.h"
#include "gpu/config/gpu_switches.h"
#include "media/media_buildflags.h"
#include "ui/gl/gl_switches.h"
#if BUILDFLAG(IS_ANDROID)
#include "base/android/build_info.h"
#endif
#if BUILDFLAG(IS_WIN)
#include "base/win/windows_version.h"
#endif // BUILDFLAG(IS_WIN)
namespace features {
#if BUILDFLAG(IS_ANDROID)
// During a scroll, enable viz to move browser controls according to the
// offsets provided by the embedded renderer, circumventing browser main
// involvement. For now, this applies only to top controls.
BASE_FEATURE(kAndroidBrowserControlsInViz,
"AndroidBrowserControlsInViz",
base::FEATURE_ENABLED_BY_DEFAULT);
// If this flag is enabled, AndroidBrowserControlsInViz and
// BottomControlsRefactor with the "Dispatch yOffset" variation must also be
// enabled.
BASE_FEATURE(kAndroidBcivBottomControls,
"AndroidBcivBottomControls",
base::FEATURE_ENABLED_BY_DEFAULT);
#endif // BUILDFLAG(IS_ANDROID)
BASE_FEATURE(kBackdropFilterMirrorEdgeMode,
"BackdropFilterMirrorEdgeMode",
base::FEATURE_ENABLED_BY_DEFAULT);
BASE_FEATURE(kUseDrmBlackFullscreenOptimization,
"UseDrmBlackFullscreenOptimization",
#if BUILDFLAG(IS_CHROMEOS)
base::FEATURE_ENABLED_BY_DEFAULT
#else
base::FEATURE_DISABLED_BY_DEFAULT
#endif
);
#if BUILDFLAG(IS_ANDROID)
BASE_FEATURE(kUseFrameIntervalDeciderAdaptiveFrameRate,
"UseFrameIntervalDeciderAdaptiveFrameRate",
base::FEATURE_DISABLED_BY_DEFAULT);
#endif
BASE_FEATURE(kTemporalSkipOverlaysWithRootCopyOutputRequests,
"TemporalSkipOverlaysWithRootCopyOutputRequests",
base::FEATURE_ENABLED_BY_DEFAULT);
BASE_FEATURE(kUseMultipleOverlays,
"UseMultipleOverlays",
#if BUILDFLAG(IS_CHROMEOS)
base::FEATURE_ENABLED_BY_DEFAULT
#else
base::FEATURE_DISABLED_BY_DEFAULT
#endif
);
const char kMaxOverlaysParam[] = "max_overlays";
BASE_FEATURE(kDelegatedCompositing,
"DelegatedCompositing",
base::FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kAvoidDuplicateDelayBeginFrame,
"AvoidDuplicateDelayBeginFrame",
base::FEATURE_DISABLED_BY_DEFAULT);
BASE_FEATURE(kTransferableResourcePassAlphaTypeDirectly,
"TransferableResourcePassAlphaTypeDirectly",
base::FEATURE_ENABLED_BY_DEFAULT);
const char kDrawQuadSplit[] = "num_of_splits";
// If enabled, overrides the maximum number (exclusive) of quads one draw quad
// can be split into during occlusion culling.
BASE_FEATURE(kDrawQuadSplitLimit,
"DrawQuadSplitLimit",
base::FEATURE_DISABLED_BY_DEFAULT);
constexpr base::FeatureParam<DelegatedCompositingMode>::Option
kDelegatedCompositingModeOption[] = {
{DelegatedCompositingMode::kFull, "full"},
#if BUILDFLAG(IS_WIN)
{DelegatedCompositingMode::kLimitToUi, "limit_to_ui"},
#endif
};
const base::FeatureParam<DelegatedCompositingMode>
kDelegatedCompositingModeParam = {
&kDelegatedCompositing,
"mode",
#if BUILDFLAG(IS_WIN)
// TODO(crbug.com/324460866): Windows does not fully support full
// delegated compositing.
DelegatedCompositingMode::kLimitToUi,
#else
DelegatedCompositingMode::kFull,
#endif
&kDelegatedCompositingModeOption,
};
#if BUILDFLAG(IS_WIN)
// If enabled, the overlay processor will force the use of dcomp surfaces as the
// render pass backing while delegated ink is being employed. This will avoid
// the need for finding what surface to synchronize ink updates with by making
// all surfaces synchronize with dcomp commit
BASE_FEATURE(kDCompSurfacesForDelegatedInk,
"DCompSurfacesForDelegatedInk",
base::FEATURE_ENABLED_BY_DEFAULT);
// If enabled, Chromium will utilize DXGI SwapChains and DComp visuals as the
// software output device rather than GDI bit block transfer to the redirection
// bitmap. Additionally, the redirection bitmap will be removed and replaced
// with the native acrylic background effect on Win11. Since the browser window
// appears before the GPU process is able to draw content into it, the acrylic
// effect gives the user feedback that a window is present and content is
// coming. Without the acrylic effect a transparent window will appear with a 1
// pixel border that eats all mouse clicks; not a good user experience. Further,
// the acylic effect will appear in uncovered regions of the window when the
// user resizes the window.
BASE_FEATURE(kRemoveRedirectionBitmap,
"RemoveRedirectionBitmap",
base::FEATURE_ENABLED_BY_DEFAULT);
#endif
#if BUILDFLAG(IS_ANDROID)
// When wide color gamut content from the web is encountered, promote our
// display to wide color gamut if supported.
BASE_FEATURE(kDynamicColorGamut,
"DynamicColorGamut",
base::FEATURE_DISABLED_BY_DEFAULT);
#endif
// Submit CompositorFrame from SynchronousLayerTreeFrameSink directly to viz in
// WebView.
BASE_FEATURE(kVizFrameSubmissionForWebView,
"VizFrameSubmissionForWebView",
base::FEATURE_DISABLED_BY_DEFAULT);
#if BUILDFLAG(IS_FUCHSIA)
// Enables SkiaOutputDeviceBufferQueue instead of Vulkan swapchain on Fuchsia.
BASE_FEATURE(kUseSkiaOutputDeviceBufferQueue,
"UseSkiaOutputDeviceBufferQueue",
base::FEATURE_ENABLED_BY_DEFAULT);
#endif
// Whether we should log extra debug information to webrtc native log.
BASE_FEATURE(kWebRtcLogCapturePipeline,
"WebRtcLogCapturePipeline",
base::FEATURE_DISABLED_BY_DEFAULT);
// Used to debug Android WebView Vulkan composite. Composite to an intermediate
// buffer and draw the intermediate buffer to the secondary command buffer.
BASE_FEATURE(kWebViewVulkanIntermediateBuffer,
"WebViewVulkanIntermediateBuffer",
base::FEATURE_DISABLED_BY_DEFAULT);
#if BUILDFLAG(IS_ANDROID)
// Hardcoded as disabled for WebView to have a different default for
// UseSurfaceLayerForVideo from chrome.
BASE_FEATURE(kUseSurfaceLayerForVideoDefault,
"UseSurfaceLayerForVideoDefault",
base::FEATURE_ENABLED_BY_DEFAULT);
BASE_FEATURE(kWebViewNewInvalidateHeuristic,
"WebViewNewInvalidateHeuristic",
base::FEATURE_DISABLED_BY_DEFAULT);
// If enabled and the device's SOC manufacturer satisifes the allowlist and
// blocklist rules, WebView reports the set of threads involved in frame
// production to HWUI, and they're included in the HWUI ADPF session.
// If disabled, WebView never uses ADPF.
// The allowlist takes precedence - i.e. if the allowlist is non-empty, the
// soc must be in the allowlist for WebView to use ADPF, and the blocklist is
// ignored. If there's no allowlist, the soc must be absent from the blocklist.
BASE_FEATURE(kWebViewEnableADPF,
"WebViewEnableADPF",
base::FEATURE_ENABLED_BY_DEFAULT);
const base::FeatureParam<std::string> kWebViewADPFSocManufacturerAllowlist{
&kWebViewEnableADPF, "webview_soc_manufacturer_allowlist", "Google"};
const base::FeatureParam<std::string> kWebViewADPFSocManufacturerBlocklist{
&kWebViewEnableADPF, "webview_soc_manufacturer_blocklist", ""};
// If enabled, Renderer Main is included in the set of threads reported to the
// HWUI. This feature works only when WebViewEnableADPF is enabled, otherwise
// this is a no-op.
BASE_FEATURE(kWebViewEnableADPFRendererMain,
"WebViewEnableADPFRendererMain",
base::FEATURE_DISABLED_BY_DEFAULT);
// If enabled, the GPU Main thread is included in the set of threads reported
// to the HWUI. This feature works only when WebViewEnableADPF is enabled,
// otherwise this is a no-op.
BASE_FEATURE(kWebViewEnableADPFGpuMain,
"WebViewEnableADPFGpuMain",
base::FEATURE_ENABLED_BY_DEFAULT);
#endif
#if BUILDFLAG(IS_APPLE)
// Increase the max CALayer number allowed for CoreAnimation.
// * If this feature is disabled, then the default limit is 128 quads,
// unless there are 5 or more video elements present, in which case
// the limit is 300.
// * If this feature is enabled, then these limits are 512, and can be
// overridden by the "default" and "many-videos"
// feature parameters.
BASE_FEATURE(kCALayerNewLimit,
"CALayerNewLimit",
base::FEATURE_DISABLED_BY_DEFAULT);
// Set FeatureParam default to -1. CALayerOverlayProcessor choose the default in
// ca_layer_overlay.cc When it's < 0.
const base::FeatureParam<int> kCALayerNewLimitDefault{&kCALayerNewLimit,
"default", -1};
const base::FeatureParam<int> kCALayerNewLimitManyVideos{&kCALayerNewLimit,
"many-videos", -1};
#endif
#if BUILDFLAG(IS_MAC)
// Whether the presentation should be delayed until the next CVDisplayLink
// callback.
BASE_FEATURE(kVSyncAlignedPresent,
"VSyncAlignedPresent",
base::FEATURE_DISABLED_BY_DEFAULT);
// Present the frame at next VSync only if this frame handles interaction or
// animation as described in kTargetForVSync. Three finch experiment groups for
// kVSyncAlignedPresent.
constexpr const char kTargetForVSyncAllFrames[] = "AllFrames";
constexpr const char kTargetForVSyncAnimation[] = "Animation";
constexpr const char kTargetForVSyncInteraction[] = "Interaction";
const base::FeatureParam<std::string> kTargetForVSync{
&kVSyncAlignedPresent, "Target", kTargetForVSyncAllFrames};
#endif
BASE_FEATURE(kAllowUndamagedNonrootRenderPassToSkip,
"AllowUndamagedNonrootRenderPassToSkip",
#if BUILDFLAG(IS_MAC)
base::FEATURE_ENABLED_BY_DEFAULT);
#else
base::FEATURE_DISABLED_BY_DEFAULT);
#endif
// Allow SurfaceAggregator to merge render passes when they contain quads that
// require overlay (e.g. protected video). See usage in |EmitSurfaceContent|.
BASE_FEATURE(kAllowForceMergeRenderPassWithRequireOverlayQuads,
"AllowForceMergeRenderPassWithRequireOverlayQuads",
base::FEATURE_ENABLED_BY_DEFAULT);
// if enabled, Any CompositorFrameSink of type video that defines a preferred
// framerate that is below the display framerate will throttle OnBeginFrame
// callbacks to match the preferred framerate.
BASE_FEATURE(kOnBeginFrameThrottleVideo,
"OnBeginFrameThrottleVideo",
#if BUILDFLAG(IS_ANDROID)
base::FEATURE_ENABLED_BY_DEFAULT
#else
base::FEATURE_DISABLED_BY_DEFAULT
#endif
);
// If enabled, Chrome uses ADPF(Android Dynamic Performance Framework) if the
// device's SOC manufacturer satisifes the allowlist and blocklist rules.
// If disabled, Chrome never uses ADPF.
// The allowlist takes precedence - i.e. if the allowlist is non-empty, the
// soc must be in the allowlist for Chrome to use ADPF, and the blocklist is
// ignored. If there's no allowlist, the soc must be absent from the blocklist.
BASE_FEATURE(kAdpf, "Adpf", base::FEATURE_ENABLED_BY_DEFAULT);
const base::FeatureParam<std::string> kADPFSocManufacturerAllowlist{
&kAdpf, "soc_manufacturer_allowlist", "Google"};
const base::FeatureParam<std::string> kADPFSocManufacturerBlocklist{
&kAdpf, "soc_manufacturer_blocklist", ""};
// Used to enable the HintSession::Mode::BOOST mode. BOOST mode try to force
// the ADPF(Android Dynamic Performance Framework) to give Chrome more CPU
// resources during a scroll.
BASE_FEATURE(kEnableADPFScrollBoost,
"EnableADPFScrollBoost",
base::FEATURE_DISABLED_BY_DEFAULT);
// Specifies how long after the boost mode is set, it will expire.
const base::FeatureParam<base::TimeDelta> kADPFBoostTimeout{
&kEnableADPFScrollBoost, "adpf_boost_mode_timeout",
base::Milliseconds(200)};
// If enabled, Chrome's ADPF(Android Dynamic Performance Framework) hint
// session includes Renderer threads only if:
// - The Renderer is handling an interacton
// - The Renderer is the main frame's Renderer, and there no Renderers handling
// an interaction.
BASE_FEATURE(kEnableInteractiveOnlyADPFRenderer,
"EnableInteractiveOnlyADPFRenderer",
base::FEATURE_ENABLED_BY_DEFAULT);
// If enabled, Chrome includes the Compositor GPU Thread into the
// ADPF(Android Dynamic Performance Framework) hint session, instead
// of the GPU Main Thread.
BASE_FEATURE(kEnableADPFGpuCompositorThread,
"EnableADPFGpuCompositorThread",
base::FEATURE_ENABLED_BY_DEFAULT);
// If enabled, Chrome puts Renderer Main threads into a separate
// ADPF(Android Dynamic Performance Framework) hint session, and does not
// report any timing hints from this session.
BASE_FEATURE(kEnableADPFSeparateRendererMainSession,
"EnableADPFSeparateRendererMainSession",
base::FEATURE_DISABLED_BY_DEFAULT);
// If enabled, Chrome uses SetThreads instead of recreating an
// ADPF(Android Dynamic Performance Framework) hint session when the set of
// threads in the session changes.
BASE_FEATURE(kEnableADPFSetThreads,
"EnableADPFSetThreads",
base::FEATURE_ENABLED_BY_DEFAULT);
// If enabled, surface activation and draw do not block on dependencies.
BASE_FEATURE(kDrawImmediatelyWhenInteractive,
"DrawImmediatelyWhenInteractive",
base::FEATURE_ENABLED_BY_DEFAULT);
// If enabled, we immediately send acks to clients when a viz surface
// activates. This effectively removes back-pressure. This can result in wasted
// work and contention, but should regularize the timing of client rendering.
BASE_FEATURE(kAckOnSurfaceActivationWhenInteractive,
"AckOnSurfaceActivationWhenInteractive",
base::FEATURE_ENABLED_BY_DEFAULT);
const base::FeatureParam<int>
kNumCooldownFramesForAckOnSurfaceActivationDuringInteraction{
&kAckOnSurfaceActivationWhenInteractive, "frames", 3};
// When enabled, SDR maximum luminance nits of then current display will be used
// as the HDR metadata NDWL nits.
BASE_FEATURE(kUseDisplaySDRMaxLuminanceNits,
"UseDisplaySDRMaxLuminanceNits",
base::FEATURE_ENABLED_BY_DEFAULT);
// On mac, when the RenderWidgetHostViewMac is hidden, also hide the
// DelegatedFrameHost. Among other things, it unlocks the compositor frames,
// which can saves hundreds of MiB of memory with bfcache entries.
BASE_FEATURE(kHideDelegatedFrameHostMac,
"HideDelegatedFrameHostMac",
base::FEATURE_DISABLED_BY_DEFAULT);
// When enabled, ClientResourceProvider will attempt to unlock and delete
// TransferableResources that have been returned as a part of eviction.
//
// Enabled by default 03/2014, kept to run a holdback experiment.
BASE_FEATURE(kEvictionUnlocksResources,
"EvictionUnlocksResources",
base::FEATURE_DISABLED_BY_DEFAULT);
// If enabled, FrameRateDecider will toggle to half framerate if there's only
// one video on screen whose framerate is lower than the display vsync and in
// perfect cadence.
BASE_FEATURE(kSingleVideoFrameRateThrottling,
"SingleVideoFrameRateThrottling",
base::FEATURE_DISABLED_BY_DEFAULT);
// When enabled, ClientResourceProvider will take callbacks intended to be ran
// on the Main-thread, and will batch them into a single jump to that thread.
// Rather than each performing its own separate post task.
//
// Enabled 03/2024, kept to run a holdback experiment.
BASE_FEATURE(kBatchMainThreadReleaseCallbacks,
"BatchMainThreadReleaseCallbacks",
base::FEATURE_ENABLED_BY_DEFAULT);
// Remove gpu process reference if gpu context is loss, and gpu channel cannot
// be established due to said gpu process exiting.
BASE_FEATURE(kShutdownForFailedChannelCreation,
"ShutdownForFailedChannelCreation",
base::FEATURE_ENABLED_BY_DEFAULT);
// If enabled, info for quads from the last render pass will be reported as
// UMAs.
BASE_FEATURE(kShouldLogFrameQuadInfo,
"ShouldLogFrameQuadInfo",
base::FEATURE_ENABLED_BY_DEFAULT);
// When enabled, ClientResourceProvider will allow for the batching of
// callbacks. So that the client can perform a series of individual releases,
// but have ClientResourceProvider coordinate the callbacks. This allows all of
// the Main-thread callbacks to be batched into a single jump to that thread.
//
// When disabled each callback will perform its own separate post task.
BASE_FEATURE(kBatchResourceRelease,
"BatchResourceRelease",
base::FEATURE_DISABLED_BY_DEFAULT);
// When enabled, BeginFrameSource will not send a `BeginFrameArgs::MISSED` in
// response to `AddObserver`. As these consistently miss deadlines, and increase
// latency and jank. Instead the client will receive the next BeginFrame.
BASE_FEATURE(kNoLateBeginFrames,
"NoLateBeginFrames",
base::FEATURE_DISABLED_BY_DEFAULT);
// Stops BeginFrame issue to use |last_vsync_interval_| instead of the current
// set of BeginFrameArgs.
// TODO(b/333940735): Should be removed if the issue isn't fixed.
BASE_FEATURE(kLastVSyncArgsKillswitch,
"LastVSyncArgsKillswitch",
base::FEATURE_DISABLED_BY_DEFAULT);
// Enables IPCs to directly target Viz's compositor thread for non-root
// CompositorFrameSink messages without hopping through the IO thread first.
BASE_FEATURE(kVizDirectCompositorThreadIpcNonRoot,
"VizDirectCompositorThreadIpcNonRoot",
base::FEATURE_DISABLED_BY_DEFAULT);
// Null Hypothesis test for viz. This will be used in an meta experiment to
// judge finch variation.
BASE_FEATURE(kVizNullHypothesis,
"VizNullHypothesis",
base::FEATURE_DISABLED_BY_DEFAULT);
// Treat frame rates of 72hz as if they were 90Hz for buffer sizing purposes.
BASE_FEATURE(kUse90HzSwapChainCountFor72fps,
"Use90HzSwapChainCountFor72fps",
base::FEATURE_ENABLED_BY_DEFAULT);
#if BUILDFLAG(IS_CHROMEOS)
// Allows the display to seamlessly adjust the refresh rate in order to match
// content preferences. ChromeOS only.
BASE_FEATURE(kCrosContentAdjustedRefreshRate,
"CrosContentAdjustedRefreshRate",
base::FEATURE_DISABLED_BY_DEFAULT);
#endif // BUILDFLAG(IS_CHROMEOS)
int DrawQuadSplitLimit() {
constexpr int kDefaultDrawQuadSplitLimit = 5;
constexpr int kMinDrawQuadSplitLimit = 1;
constexpr int kMaxDrawQuadSplitLimit = 15;
const int split_limit = base::GetFieldTrialParamByFeatureAsInt(
kDrawQuadSplitLimit, kDrawQuadSplit, kDefaultDrawQuadSplitLimit);
return std::clamp(split_limit, kMinDrawQuadSplitLimit,
kMaxDrawQuadSplitLimit);
}
bool IsDelegatedCompositingEnabled() {
return base::FeatureList::IsEnabled(kDelegatedCompositing);
}
bool IsVizDirectCompositorThreadIpcNonRootEnabled() {
return base::FeatureList::IsEnabled(kVizDirectCompositorThreadIpcNonRoot);
}
#if BUILDFLAG(IS_ANDROID)
bool IsDynamicColorGamutEnabled() {
if (viz::AlwaysUseWideColorGamut())
return false;
auto* build_info = base::android::BuildInfo::GetInstance();
if (build_info->sdk_int() < base::android::SDK_VERSION_Q)
return false;
return base::FeatureList::IsEnabled(kDynamicColorGamut);
}
#endif
bool IsUsingVizFrameSubmissionForWebView() {
return base::FeatureList::IsEnabled(kVizFrameSubmissionForWebView);
}
bool ShouldWebRtcLogCapturePipeline() {
return base::FeatureList::IsEnabled(kWebRtcLogCapturePipeline);
}
#if BUILDFLAG(IS_ANDROID)
bool UseWebViewNewInvalidateHeuristic() {
// For Android TVs we bundle this with WebViewSurfaceControlForTV.
if (base::android::BuildInfo::GetInstance()->is_tv()) {
return base::FeatureList::IsEnabled(kWebViewSurfaceControlForTV);
}
return base::FeatureList::IsEnabled(kWebViewNewInvalidateHeuristic);
}
#endif
bool UseSurfaceLayerForVideo() {
#if BUILDFLAG(IS_ANDROID)
// SurfaceLayer video should work fine with new heuristic.
if (UseWebViewNewInvalidateHeuristic()) {
return true;
}
// Allow enabling UseSurfaceLayerForVideo if webview is using surface control.
if (::features::IsAndroidSurfaceControlEnabled()) {
return true;
}
return base::FeatureList::IsEnabled(kUseSurfaceLayerForVideoDefault);
#else
return true;
#endif
}
int MaxOverlaysConsidered() {
if (!base::FeatureList::IsEnabled(kUseMultipleOverlays)) {
return 1;
}
return base::GetFieldTrialParamByFeatureAsInt(kUseMultipleOverlays,
kMaxOverlaysParam, 8);
}
bool ShouldOnBeginFrameThrottleVideo() {
return base::FeatureList::IsEnabled(features::kOnBeginFrameThrottleVideo);
}
bool ShouldDrawImmediatelyWhenInteractive() {
return base::FeatureList::IsEnabled(
features::kDrawImmediatelyWhenInteractive);
}
bool ShouldAckOnSurfaceActivationWhenInteractive() {
return base::FeatureList::IsEnabled(
features::kAckOnSurfaceActivationWhenInteractive);
}
bool Use90HzSwapChainCountFor72fps() {
return base::FeatureList::IsEnabled(kUse90HzSwapChainCountFor72fps);
}
std::optional<uint64_t>
NumCooldownFramesForAckOnSurfaceActivationDuringInteraction() {
if (!ShouldAckOnSurfaceActivationWhenInteractive()) {
return std::nullopt;
}
CHECK_GE(kNumCooldownFramesForAckOnSurfaceActivationDuringInteraction.Get(),
0)
<< "The number of cooldown frames must be non-negative";
return static_cast<uint64_t>(
kNumCooldownFramesForAckOnSurfaceActivationDuringInteraction.Get());
}
bool ShouldLogFrameQuadInfo() {
return base::FeatureList::IsEnabled(features::kShouldLogFrameQuadInfo);
}
#if BUILDFLAG(IS_MAC)
bool IsVSyncAlignedPresentEnabled() {
return base::FeatureList::IsEnabled(features::kVSyncAlignedPresent);
}
#endif
#if BUILDFLAG(IS_CHROMEOS)
bool IsCrosContentAdjustedRefreshRateEnabled() {
return base::FeatureList::IsEnabled(kCrosContentAdjustedRefreshRate);
}
#endif // BUILDFLAG(IS_CHROMEOS)
#if BUILDFLAG(IS_WIN)
bool ShouldRemoveRedirectionBitmap() {
// Limit to Win11 because there are a high number of D3D9 users on Win10;
// which requires the Redirection Bitmap. Additionally, software GL in tests
// can take the Swiftshader rendering path, which also needs the Redirection
// Bitmap. On devices with DComp disabled, ANGLE draws to the redirection
// bitmap via a blit swap chain, so check for the command line switch as well.
// 22H2 is specified because it is the lowest version supporting DWM system
// backdrop.
return base::win::GetVersion() >= base::win::Version::WIN11_22H2 &&
base::FeatureList::IsEnabled(kRemoveRedirectionBitmap) &&
!base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kOverrideUseSoftwareGLForTests) &&
!base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableDirectComposition);
}
#endif
#if BUILDFLAG(IS_ANDROID)
bool IsBcivBottomControlsEnabled() {
return base::FeatureList::IsEnabled(features::kAndroidBcivBottomControls);
}
bool IsBrowserControlsInVizEnabled() {
return base::FeatureList::IsEnabled(features::kAndroidBrowserControlsInViz);
}
bool ShouldUseAdpfForSoc(std::string_view soc_allowlist,
std::string_view soc_blocklist,
std::string_view soc) {
std::vector<std::string_view> allowlist = base::SplitStringPiece(
soc_allowlist, "|", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
std::string blocklist_param = features::kADPFSocManufacturerBlocklist.Get();
std::vector<std::string_view> blocklist = base::SplitStringPiece(
soc_blocklist, "|", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
// If there's no allowlist, soc must be absent from the blocklist.
if (allowlist.empty()) {
return !base::Contains(blocklist, soc);
}
// If there's an allowlist, soc must be in the allowlist.
// Blocklist is ignored in this case.
return base::Contains(allowlist, soc);
}
#endif // BUILDFLAG(IS_ANDROID)
} // namespace features
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