CHANGELOG.md

Changelog

2026.02.02

• Upgraded demo_cc_offscreen to M141, mainly adopt changes from demo_cc_gui

2026.01.22

• Upgraded demo_cc_gui to M141 with the following main changes:
  • viz::SharedBitmapReporter is no longer a base class of cc::LayerTreeFrameSink, see 6164986
  • DidCommit(), DidCommitAndDrawFrame(), DidCompletePageScaleAnimation(), DidObserveFirstScrollDelay() added a source_frame_number parameter.
  • FrameTimingDetails has been added to WebFrameWidgetImpl, see 5331910.
  • DidReceiveCompositorFrameAck() has been removed from LayerTreeHostClient, see 5468167.
  • ContentLayerClient::PaintableRegion() has been removed, see 5190710.
  • NotifyNewLocalSurfaceIdExpectedWhilePaused() has been added to cc::LayerTreeFrameSink, see 6588556.
  • ThroughputTracker has been renamed to CompositorMetricsTracker for broader use in tracking metrics, see 6042895.
  • WebVitalMetrics has been removed, see 5822616.
  • Added GPU initialization logic and initialized FrameSinkManager to properly use SharedImageInterface. Since ClientSharedImageInterface was used by LayerTreeFrameSink but changed to SharedImageInterface by 7102838, to simplify the process model, a cast is performed in BindToClient to bypass this change.

2026.01.12

• Upgraded demo_views to M141 with the following main changes:
  • views::WidgetDelegateView is marked as Deprecated and PassKey is added to control usage, see 6441736. This example directly inherits from the two subclasses according to the comments, and separates View and Delegate according to the design logic, binding the View instance through SetContentsView() inside Delegate.
  • Migrated views::Background to ui::ColorVariant with method renaming, see 6331510
  • Starting from 4518125, Windows UI requires a thread pool initialized with MTA.
• Upgraded demo_linktest to M141 with Windows support.

2026.01.09

• Upgraded demo_gin to M141 with the following main changes:
  1. v8::MicrotasksScope::MicrotasksScope(Isolate* isolate, Type type) has been removed, see 5539888
  2. Moved the extends part as a separate component to avoid inconsistent GIN_EXPORT definition issues
  3. Added v8::Isolate::Scope in AsyncAdd to fix the issue where v8::internal::g_current_isolate_ is null causing v8::Integer::New to trigger DCheck

2025.12.25

• Upgraded demo_skia to M141 on Windows platform (software only) with the following main changes:
  1. Added WinSoftwareBitmapPresenter to support presenting software rendered bitmaps on Windows platform using GDI API.
  2. Modified SkiaCanvasSoftware to utilize WinSoftwareBitmapPresenter when running on Windows.
  3. Updated build configuration to include necessary dependencies for Windows platform.
  4. Rename namespace demo_jni to demo in demo_skia module for consistency.

2025.12.24

• Upgraded demo_viz_offscreen to M141 with the following main changes:
  1. SharedBitmapManager has been removed from FrameSinkManagerImpl::InitParams, see 6180026
  2. FrameRateDecider has been removed, see 6515298
  3. Instantiation of viz::Display now requires gpu::Scheduler, see 5757160
• Documentation update: converted demo list to table format and added compatibility test status markers

2025.12.17

• Upgraded demo_viz_gui to M141 with the following main changes:
  1. components/viz/common/resources/bitmap_allocation.h has been removed
  2. viz::TileDrawQuad::SetNew removed the is_premultiplied parameter, see 6500701
  3. viz::ContentDrawQuadBase::texture_size has been removed, multiple quad types were modified, see 6653194
  4. viz::TextureDrawQuad::SetNew removed the is_premultiplied, flipped, and opacity parameters, see 6516061, 6019939, 5119685
  5. SharedBitmap has been deleted, see 6180918. Normally, SharedImageInterface provided by viz::RasterContextProvider should be used instead; here we bypass using the low-level interface provided by viz::SharedImageInterfaceProvider
  6. The frame_ack parameter in OnBeginFrame of RootFrameSink has been removed, and a new pure virtual method OnSurfaceEvicted() has been added, see 6417183, 4956873
  7. Fixed initialization on Windows according to commit 7230224 to avoid crashes
  8. Fixed the clip parameter of SharedQuadState. This change has not yet found a corresponding upstream change; testing found that without this change, drawing content that exceeds the clip after transform will be discarded (made transparent) directly
  9. Since all resources are passed through SharedImage, the corresponding release logic is complex; after saving the trace, changed to directly force exit the process to simplify the implementation

2025.11.16

• Upgraded demo_gl to M141 with the following main changes:
  1. The return type of ui::Event::type() has changed to ui::EventType, keywords modified
  2. The OnMouseEnter() method of ui::PlatformWindowDelegate has been renamed to OnCursorUpdate()
  3. //gpu can no longer be externally visible; the required functionality in this case is concentrated in //gpu/config
  4. gl's SharedContextState requires surface to be off-screen; temporarily commented out the creation and use of SharedContextState

2025.11.11

• Upgraded core modules (log, task, memory, tracing, resources, mojo, mojo_v8) to M141 with the following changes:
  1. The DISALLOW_COPY_AND_ASSIGN macro is deprecated
  2. base::MemoryPressureMonitor::GetCurrentPressureLevel() now requires a base::MemoryPressureMonitorTag parameter
  3. mojo's ReadData() and WriteData() now use std::span to replace the previous buffer pointer + length parameters, and a new reference parameter has been added to indicate the actual amount of data read/written
  4. v8::FunctionCallbackInfo::Holder() is deprecated, use This() instead
  5. Resources kDemoGenResources array no longer provides length information
  6. Tracing fully enables Perfetto, traditional initialization methods have been removed; Startup initialization is now moved forward to execute tracing::InitTracingPostFeatureList() once after only initializing FeatureGating
• Added a new case demo_mojo_child_process under mojo, demonstrating direct inter-process communication between two child processes through parent process establishment
• ChangeLog split to a separate file

2024.6.23

• Add demo_task_thread, which demonstrates the use of a task in a new thread;

2023.12.24

Migrate some demos to M120, the upgrade is described below:

1. ThreadTaskRunnerHandle was replaced by SingleThreadTaskRunner;
2. The TRACE_* macro enables the perfetto client library by default;
3. mojo enables ipcz by default, and parameters must be passed for multi-process initialization;
4. The gl initialization interface supports selecting GPU;
5. The SharedQuadState::SetAll interface supports setting fast_rounded_corner;
6. viz::TransferableResource supports a clearer distinction between single-plane and multi-plane resources;
7. In order to reduce the number of viz PostTasks, CompositorFrameSinkClient::OnBeginFrame merges the functions of ReclaimResources and DidReceiveCompositorFrameAck;
8. Deleted the SkEncodeImage interface and replaced it with SkXXXEncoder::Encode;
9. Skia moved the DDL-related interfaces to chromium private and renamed them. The public DDL interface will no longer be provided in the future. After the change, only ganesh supports DrawDDL, and graphite does not.

2023.8.24

• Add demo_linktest, demonstrates incorrect use of gn causing link errors;

2023.3.25

• Migrate demo_skia to M110;

2023.3.16

• Migrate demo_views to M110;

2023.3.15

• Migrate demo_cc_offscreen to M110;
• Migrate demo_gin to M110;

2023.3.12

• Migrate demo_viz_gui to M110;

2023.3.11

• Update 110 branch to 5481;

2022.12.4

• Migrate some demo to M110;

2022.4.27

• Add demo_gin，demonstrate how to use gin to create a javascript runtime;

2021.9.13

• Add demo_mojo_v8，demonstrate how to use js in the render process to access the mojo interface provided by the browser process;

2021.9.6

• Migrate demo_views to M91；
• Migrate demo_cc_offscreen to M91；

2021.9.4

• Migrate demo_viz_offscreen to M91；

2021.9.3

• Migrate demo_ipc to M91;
• Migrate demo_services to M91;

2021.8.15

• Migrate demo_gl to M91;

2021.7.29

• Migrate below demos to M91：
  • demo_resources

2021.7.22

• Migrate below demos to M91：
  • demo_memory

2021.7.17

• Migrate below demos to M91：
  • demo_exe
  • demo_tracing_perfetto
  • demo_tracing_perfetto_content
  • demo_messageloop
  • demo_tasks
  • demo_mojo_single_process
  • demo_mojo_multiple_process
  • demo_mojo_multiple_process_binding
• Rename below demos：
  • demo_messageloop to demo_task_executor
  • demo_tasks to demo_task_thread_pool

2020.8.10

• Add demo_gl, the demo uses the //ui/gl module to call GL for rendering;

2020.7.31

• demo_viz_layer_offscreen supports off-screen rendering using the SkiaOutputDeviceOffscreen interface;

2020.7.28

• Add demo_viz_layer_offscreen to demonstrate using VIZ's CopyOutput interface for off-screen rendering;

2020.7.24

• Add demo_viz_layer, demonstrate the use of VIZ for handwriting writing, and support the use of command lines to switch between software and hardware rendering;

2020.7.18

• Add demo_viz_gui_gpu to demonstrate the use of VIZ for hardware accelerated rendering and VIZ Client nesting;

2020.7.15

• Add demo_x11_glx and demo_x11_egl;

2020.7.11

• Add demo_x11 to demonstrate the use of X11 to create transparent windows;
• Update demo_skia, use software rendering by default, support transparent windows, GL rendering supports GL_RGB565 pixel format;

2020.6.28

• Add demo_skia to demonstrate the software/hardware rendering using Skia in Linux;

2020.6.4

• Update demo_android_skia, add multi-thread rendering and frame rate synchronization;

2020.5.31

• Add demo_android_skia to demonstrate the use of Skia in Android for software/hardware rendering;

2020.5.21

• Add demo_tracing_perfetto_content to demonstrate how the content module saves trace to a file, which can be used for chrome://tracing;
• Add demo_tracing documentation demo_tracing;

2020.5.18

• Move demo_tracing to demo_tracing folder and rename it to demo_tracing_console, add Flush function;
• Add demo_tracing_perfetto to demonstrate the integration and use of trace and perfetto;

2020.4.29

• Add demo_cc_gui to demonstrate using cc to display GUI interface;

2020.4.17

• Added TRACE.txt of demo_cc to help understand the runtime behavior of cc;

2020.4.10

• Add demo_cc_offscreen, demonstrate the use of cc for off-screen rendering;

2020.4.6

• Add demo_viz_offscreen, demonstrate using viz for off-screen rendering;
• Modify demo_viz to demo_viz_gui, the function is unchanged;

2020.3.31

• Add demo_viz, demonstrate using viz module;
• Add documentation for viz: viz

2020.3.21

• Add demo_views, demonstrate using //ui/views to develop UI;

2020.3.12

• demo_apk supports JNI to call instance method of C++ class;
• Add document: [browser startup process brief description] (./docs/startup.md)

2020.3.7

• demo_apk supports JNI;
• Add document: demo_apk

2020.3.4

• Add demo_tracing to demonstrate the use of trace;
• Add demo_apk to demonstrate how to use gn to create Android applications;
• Add demo_shell to demonstrate how to use the Content API to create a streamlined browser;

Earlier

Add the following demo and related documents:

• demo_exe: the simplest demo, demonstrate gn and create your own exe;
• demo_log: demonstrate the use of log library;
• demo_tracing: demonstrate the use of Trace;
• demo_tasks: demonstrate the use of thread pool ThreadPool;
• demo_messageloop: demonstrate the use of message loop MessageLoop;
• demo_mojo_single_process: demonstrate the use of mojo library in a single process;
• demo_mojo_multiple_process: demonstrate the use of the mojo library in multiple processes;
• demo_mojo_multiple_process_binding: demonstrate the use of the binding layer of the mojo library in multiple processes;
• demo_services: demonstrate the use of mojo-based servcies and multi-process architecture;
• demo_ipc: demonstrate the use of mojo-based IPC interface;
• demo_memory: demonstrate the use of SharedMemory;