a9a1f9ac1f
* Replace saveLayer with MaskFilter for drop shadows Drop shadows now draw directly with MaskFilter.MakeBlur instead of saveLayer + ImageFilter. Eliminates per-shadow offscreen buffer allocation, significantly improving render throughput for scenes with many shadowed nodes. Text shadows still use saveLayer (MaskFilter can't be applied to text glyphs individually). Benchmark: 50 shadow nodes render at 1.55ms/frame (scene change). * Cache per-node SkPictures for effect rendering Nodes with visible effects (shadows, blurs) are recorded into individual SkPictures and replayed on subsequent scene redraws. Only the modified node re-records; unchanged shadow nodes replay from cache. - MaskFilter.MakeBlur for drop shadows instead of saveLayer - Reusable effectLayerPaint and cached ImageFilters/MaskFilters - invalidateNodePicture() called on node update - invalidateAllPictures() on font load; invalidateScenePicture() preserves node cache for scene-only invalidation - Shadow benchmark: 50 nodes at 1.47ms/frame (scene change) * Update changelog with shadow rendering performance improvements |
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