Enhance your Flutter painting skills
summary
A live demo builds a “Happy Sparkle” face that follows the pointer, leaves particle trails, and rotates sparkles while remaining performant. Code uses CustomPaint with Paint.shader (radial gradients and image/fragment shaders), maskFilter blur, and repaints driven by a Listenable and shouldRepaint comparisons. Positioning uses canvas.save/restore to rotate copies, images use drawAtlas/drawRawAtlas to batch 21 sprites into one GPU call, overlapping-opacity fixes use saveLayer (expensive), and many particles use drawVertices with indices for efficiency.
AI-written summary · about
chapters (10)
- 0:00Flutter painting intro
- 4:48Happy Sparkle magic
- 7:39Repainting custom painters
- 10:09Canvas save and restore
- 12:41Animating custom painters
- 15:11Drawing with drawAtlas
- 19:58Fixing opacity issues
- 25:02Drawing many vertices
- 29:22Flutter painting recap
- 30:50Closing & Q&A
related talks
42mGet Animated with Flutter!
28mFragment Shaders In Flutter: A whole new World
32mAnimations in Flutter
37mMastering CustomPainter: Going Beyond Widgets in Flutter
34mMastering CustomPainter: Going Beyond Widgets in Flutter
47mAnimations in Flutter
01h 23mAdvanced animations in Flutter
36mBuild The Million-Dollar Animation