Android Graphics: the Path to [UI] Riches

on YouTube ↗42m

" summary

Overview of concrete changes and demos: history from Skia (2005) explains why canvas and Paint are stateful and awkward—Paint accumulates 27 constants and tangled text APIs—allocations drove mutable APIs. Canvas moves to GPU (2011); Android adds hardware bitmaps, blend modes (Android 11), RenderEffect blurs (12) and runtime shaders (13). Kotlin + Jetpack bring clearer APIs and backports (path iterator to API 21). New Graphics Shapes library (alpha) produces rounded polygons and constrained morphing that actually animates; demos and GitHub code run and illustrate outcomes.

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" chapters (35)

1. 0:00Android Graphics APIs intro
2. 1:08Origins of Android’s Graphics APIs
3. 2:14Immediate Mode vs Stateful Canvas
4. 3:18Paint class overload issues
5. 4:42Stateful Canvas and Paint side effects
6. 6:04Bitmap Shader inconsistencies
7. 7:07Legacy allocation constraints
8. 9:58Primitive types and binary compat
9. 10:39View drawing in Android 1.0
10. 11:00Fake 3D in Skia
11. 12:03Opaque objects missing info
12. 13:28Undocumented APIs and Camera
13. 14:12Poorly Documented Path Effects
14. 14:55Color Matrix documentation
15. 15:16Hidden Canvas features
16. 16:45Path measurement and animation
17. 17:07Boolean operations on paths
18. 17:49Color filters explained
19. 20:37Live demo: Color filters
20. 22:01Gradients creative uses
21. 23:03Evolution of Graphics APIs
22. 23:44GPU acceleration and bitmaps
23. 24:25Blend modes and Porter-Duff
24. 25:29Blur effects in Android 12
25. 25:50Runtime shaders for effects
26. 27:33Modern Android graphics with Kotlin
27. 28:16Kotlin for Graphics APIs
28. 29:41Jetpack graphics extensions
29. 31:46Canvas in Jetpack Compose
30. 32:51Path Inspection API in U
31. 33:56Graphics Shapes Library
32. 37:45Shape morphing automation
33. 39:52Future path features
34. 40:55Stateless Canvas redesign
35. 41:15Conclusion

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