blink::PaintChunk and blink::DisplayItemList
Blink28610 Okt 2025

blink::PaintChunk and blink::DisplayItemList

grouping and content.

  • PaintChunk: groups sequential display items that share the same property‑tree state and cull/visibility; it’s the unit we layerize and invalidate.

  • DisplayItemList: the recorded Skia/paint operations (text, images, paths, etc.). This split lets us reason about “where/how to draw” (chunk) vs. “what to draw” (items). (Chromium Git Repositories)

Hands off to: PaintArtifactCompositor for compositing decisions, then PropertyTreeManager to mirror trees into cc.


Avsnitt(397)

gpu::SkiaOutputSurfaceImplOnGpu / gpu::CommandBuffer

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Bridges Skia’s recorded commands to the GPU command buffer; submits and SwapBuffers to present. (Backend: GL/Vulkan/Metal via GPU process.)

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Renderer that turns quads into Skia operations (recording DDLs / drawing to the output surface).

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The display compositor that walks the aggregated render passes and issues draw commands for the final output.

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Scroll processing and overscroll detection in the compositor. The LayerTreeHostImpl in cc implements the compositor-thread InputHandler that processes gesture scroll updates and flings. It manages the...

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blink::EventHandler (Blink core input handling)

Scroll chain builder and overscroll chaining logic. Blink’s EventHandler is responsible for building the scroll chain (the sequence of nested scrollable ancestors) when the user scrolls an element . I...

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blink::ElasticOverscrollController

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Overscroll orchestration and animation. This Blink-side controller manages the rubber-banding (elastic stretch and rebound) effect when a scrollable area is overscrolled. It observes gesture scroll ev...

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viz::Surface / SurfaceAggregator

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Receives frames from one or more surfaces (main page and OOPIFs), aggregates them into a single display frame.

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viz::CompositorFrameSink (client side)

viz::CompositorFrameSink (client side)

The submission interface used by cc to hand the frame to viz.

23 Sep 202531min

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