WebKit Igalia Periodical #53

The memory footprint calculation mechanism has been unified across GTK, JSC, and WPE ports. Therefore, the expensive /proc/self/smaps is not used anymore and the WPE uses /proc/self/statm with extra cache now to prevent frequent file reading.

Added a new webkit_context_menu_get_position() function to the API that allows obtaining the pointer coordinates, relative to the web view origin, at the moment when a context menu was triggered.

Additionally, behaviour of context menus has been made more consistent between the GTK and WPE ports, and handling of GAction objects attached to menu items has been rewritten and improved with the goal of better supporting context menus in the WPE port.

In JavaScriptCore's implementation of Temporal, fixed a bug in Temporal.PlainTime.from that read options in the wrong order, which caused a test262 test to fail.

In JavaScriptCore's implementation of Temporal, fixed several bugs in PlainYearMonth methods and enabled all PlainYearMonth tests that don't depend on the Intl object. This completes the implementation of Temporal PlainYearMonth objects in JSC.

In WebKit's Skia graphics backend, fixed GrDirectContext management for GPU resources. Operations on GPU-backed resources must use the context that created them, not the current thread's context. The fix stores GrDirectContext at creation time for NativeImage and uses surface->recordingContext()->asDirectContext() for SkSurface, correcting multiple call sites that previously used the shared display's context incorrectly.

Damage propagation has been added to the recently-added, non-composited mode in WPE.

In WebKit's Skia graphics backend for GTK/WPE, added canvas 2D operation recording for GPU-accelerated rendering. Instead of executing drawing commands immediately, operations are recorded into an SkPicture and replayed in batch when the canvas contents are needed, reducing GPU state change overhead for workloads with many small drawing operations, improving the MotionMark Canvas Lines performance on embedded devices with low-end tiled GPUs.

Due to Qt5 not receiving maintenance since mid-2025, the WPE Qt5 binding that used the legacy libwpe API has been removed from the tree. The Qt6 binding remains part of the source tree, which is a better alternative that allows using supported Qt versions, and is built atop the new WPEPlatform API, making it a future-proof option. The WPE Qt API may be enabled when configuring the build with CMake, using the ENABLE_WPE_QT_API option.

The WPEScreenSyncObserver class has been improved to support multiple callbacks. Instead of a single callback set with wpe_screen_sync_observer_set_callback(), clients of the API can now use wpe_screen_sync_observer_add_callback() and wpe_screen_sync_observer_remove_callback(). The observer will be paused automatically when there are no callbacks attached to it.