| reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame] | 1 | Skia Update |
| 2 | |
| 3 | Skia : Overview |
| 4 | - portable 2D graphics engine |
| reed | bb8a0ab | 2014-11-03 22:32:07 -0800 | [diff] [blame^] | 5 | - src : geometry, images, text |
| 6 | - attr: shaders, filters, antialiasing, blending |
| 7 | - dst : raster, gpu, pdf, picture |
| reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame] | 8 | |
| 9 | Skia : Porting |
| 10 | - C++ and some SIMD assembly |
| reed | bb8a0ab | 2014-11-03 22:32:07 -0800 | [diff] [blame^] | 11 | - Fonts : CoreText, FreeType, GDI, DirectWrite |
| reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame] | 12 | - Threads : wrappers for native apis |
| 13 | - Memory : wrappers for [new, malloc, discardable] |
| 14 | |
| reed | bb8a0ab | 2014-11-03 22:32:07 -0800 | [diff] [blame^] | 15 | Skia : Clients |
| 16 | - Blink : under the GraphicsContext hood |
| 17 | - Chrome : ui/gfx and compositor |
| 18 | - Android framework |
| 19 | - third parties : e.g. Mozilla |
| 20 | - sites.google.com/site/skiadocs |
| reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame] | 21 | |
| reed | bb8a0ab | 2014-11-03 22:32:07 -0800 | [diff] [blame^] | 22 | Skia In Blink |
| reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame] | 23 | |
| 24 | Skia In Blink : Fonts |
| reed | bb8a0ab | 2014-11-03 22:32:07 -0800 | [diff] [blame^] | 25 | - SkTypeface and SkFontMgr : platform agnostic |
| reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame] | 26 | - Runtime switch between GDI and DirectWrite |
| reed | bb8a0ab | 2014-11-03 22:32:07 -0800 | [diff] [blame^] | 27 | - SkTextBlob to encapsulate runs of text |
| reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame] | 28 | - Push LCD decision-making out of Blink |
| 29 | |
| 30 | Skia In Blink : Record-Time-Rasterization |
| 31 | - Direct rendering during “Paint” pass |
| 32 | -- Image scaling, filters |
| 33 | -- SVG patterns, masks |
| 34 | - Problematic in modern Blink |
| 35 | -- CTM not always known/knowable |
| 36 | -- Rendering backend not always known (gpu or cpu) |
| 37 | -- Rasterization takes (too much) time |
| 38 | |
| 39 | Skia In Blink : RTR response |
| 40 | - SkImageFilter w/ CPU and GPU implementations |
| reed | bb8a0ab | 2014-11-03 22:32:07 -0800 | [diff] [blame^] | 41 | - FilterLevel : none, low, medium (mipmaps), high |
| reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame] | 42 | - SkPicture for caching SVG |
| 43 | - SkPicture + saveLayer() for masks |
| 44 | -- PathOps for resolving complex paths |
| 45 | - SkPictureShader for device-independent patterns |
| reed | bb8a0ab | 2014-11-03 22:32:07 -0800 | [diff] [blame^] | 46 | |
| 47 | Skia In Blink : Recording |
| 48 | - GraphicsContext usuaually backed by SkPicture |
| 49 | -- draw commands are recorded for later playback |
| 50 | -- all parameters must be copied or (safely) ref'd |
| 51 | -- may record more than is currently visible |
| 52 | - Resulting picture may be replayed multiple times |
| 53 | |
| 54 | Skia In Blink : Recording response |
| 55 | - New implementation |
| 56 | - Optimized for recording speed |
| 57 | -- shallow copies whenever possible |
| 58 | -- rearchitect all Skia effects to be immutable |
| 59 | - Reentrant-safe for playback in multiple threads |
| 60 | -- also affected effect subclasses |
| 61 | |
| 62 | Skia In Blink : Playback |
| 63 | - Separate pass for optimizations (optional) |
| 64 | -- peep-holes rewrites |
| 65 | -- compute bounding-box hierarchy for faster tiling |
| 66 | -- can be done outside of Blink thread |
| 67 | - GPU optimizations |
| 68 | -- layer "hoisting" |
| 69 | -- distance field fonts |
| 70 | |
| 71 | Skia : Roadmap |
| 72 | |
| 73 | Skia In Blink : Roadmap |
| 74 | - GPU performance |
| 75 | -- extended OpenGL features (e.g. geometry shaders) |
| 76 | -- reordering for increased batching |
| 77 | -- support for new low-level OpenGL APIs |
| 78 | - Cross process support |
| 79 | -- immediate mode ala SkGPipe |
| 80 | -- serialize pictures |
| 81 | |
| 82 | Skia API Roadmap |
| 83 | - Direct support for sRGB |
| 84 | - Stable C API / ABI |
| 85 | -- bindings for JS, Go, Python, Lua |
| 86 | - Robust file format |
| 87 | |
| 88 | Demo |
| 89 | |