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| author | anton@chromium.org <anton@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2014-03-18 22:36:55 +0000 |
|---|---|---|
| committer | anton@chromium.org <anton@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2014-03-18 22:36:55 +0000 |
| commit | cf5e989ddd7831b0d50e4b076b68ff8306b7c899 (patch) | |
| tree | 432af06fb8ea25c2926e7905aef65bc6e5a5d3a5 /content/renderer | |
| parent | 421c150eb78989b877aa621359a7af43a548c49d (diff) | |
| download | chromium_src-cf5e989ddd7831b0d50e4b076b68ff8306b7c899.zip chromium_src-cf5e989ddd7831b0d50e4b076b68ff8306b7c899.tar.gz chromium_src-cf5e989ddd7831b0d50e4b076b68ff8306b7c899.tar.bz2 | |
Add --disable-low-res-tiling. Disable low res tiling to save power.
Generating low resolution tiles uses about 10% of the power used by
pages that have gif animations (measured on Nexus 4). These are the
most common pages on which chrome consumes above baseline power.
It is unclear whether low resolutions are still valuable. It is
likely that having low resolution tiles is more useful on older
devices. For the moment providing this as a flag, so that it
is easier to investigate whether dropping low resolution tiles
is reasonable. Default behavior is unchanged, low resolution tiles
are enabled.
BUG=
Review URL: https://codereview.chromium.org/196473007
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@257790 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'content/renderer')
| -rw-r--r-- | content/renderer/gpu/render_widget_compositor.cc | 2 | ||||
| -rw-r--r-- | content/renderer/render_thread_impl.cc | 6 | ||||
| -rw-r--r-- | content/renderer/render_thread_impl.h | 3 |
3 files changed, 11 insertions, 0 deletions
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc index d5a258b..f059451 100644 --- a/content/renderer/gpu/render_widget_compositor.cc +++ b/content/renderer/gpu/render_widget_compositor.cc @@ -142,6 +142,8 @@ scoped_ptr<RenderWidgetCompositor> RenderWidgetCompositor::Create( settings.rasterization_site = cc::LayerTreeSettings::HybridRasterization; else settings.rasterization_site = cc::LayerTreeSettings::CpuRasterization; + settings.create_low_res_tiling = + RenderThreadImpl::current()->is_low_res_tiling_enabled(); settings.calculate_top_controls_position = cmd->HasSwitch(cc::switches::kEnableTopControlsPositionCalculation); diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc index ccdb4cc..a6e616f 100644 --- a/content/renderer/render_thread_impl.cc +++ b/content/renderer/render_thread_impl.cc @@ -445,6 +445,12 @@ void RenderThreadImpl::Init() { } } + is_low_res_tiling_enabled_ = !is_gpu_rasterization_enabled_; + if (command_line.HasSwitch(switches::kDisableLowResTiling) && + !command_line.HasSwitch(switches::kEnableLowResTiling)) { + is_low_res_tiling_enabled_ = false; + } + // Note that under Linux, the media library will normally already have // been initialized by the Zygote before this instance became a Renderer. base::FilePath media_path; diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h index 192cb8a8..88e0c3d 100644 --- a/content/renderer/render_thread_impl.h +++ b/content/renderer/render_thread_impl.h @@ -212,6 +212,8 @@ class CONTENT_EXPORT RenderThreadImpl : public RenderThread, return is_impl_side_painting_enabled_; } + bool is_low_res_tiling_enabled() const { return is_low_res_tiling_enabled_; } + bool is_lcd_text_enabled() const { return is_lcd_text_enabled_; } bool is_map_image_enabled() const { return is_map_image_enabled_; } @@ -532,6 +534,7 @@ class CONTENT_EXPORT RenderThreadImpl : public RenderThread, bool is_gpu_rasterization_enabled_; bool is_gpu_rasterization_forced_; bool is_impl_side_painting_enabled_; + bool is_low_res_tiling_enabled_; bool is_lcd_text_enabled_; bool is_map_image_enabled_; |