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Diffstat (limited to 'resources/lua/slides_content2.lua')
| -rw-r--r-- | resources/lua/slides_content2.lua | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/resources/lua/slides_content2.lua b/resources/lua/slides_content2.lua new file mode 100644 index 0000000000..2b293a244a --- /dev/null +++ b/resources/lua/slides_content2.lua @@ -0,0 +1,123 @@ +Skia Update + +Skia : Access +- https://skia.org +- https://skia.googlesource.com/skia + +Skia : Overview +- portable graphics engine +- 2D transformations + perspective +- primitives: text, geometry, images +- effects: shaders, filters, antialiasing, blending + +Skia : Porting +- C++ and some SIMD assembly +- Fonts : CoreText, FreeType, GDI, DirectWrite +- Threads : wrappers for native apis +- Memory : wrappers for [new, malloc, discardable] + +Skia : Backends +- Surface +-- raster : ARGB, RGB16, A8 in software +-- gpu : transcribe to OpenGL +- Document +-- transcribe to PDF or XPS +- Record and Playback +-- Picture +-- Pipe + +Skia : Clients +- Blink : under the GraphicsContext hood +- Chrome : ui/gfx and compositor +- Android : framework +- third parties : e.g. Mozilla + +Skia In Blink + +Skia In Blink : Fonts +- SkTypeface and SkFontMgr : platform agnostic +- Runtime switch between GDI and DirectWrite +- SkTextBlob to encapsulate runs of text +- Push LCD decision-making out of Blink + +Skia In Blink : Record-Time-Rasterization +- What? : direct rendering during “Paint” pass +-- Image scaling, filters +-- SVG patterns, masks +- Problematic in modern Blink +-- CTM not always known/knowable +-- Rendering backend not always known (gpu or cpu) +-- Rasterization takes (too much) time + +Skia In Blink : RTR response +- SkImageFilter w/ CPU and GPU implementations +- Bitmap scaling : bilerp, mipmaps, fancy +- SkPicture for caching SVG +- SkPicture + saveLayer() for masks +-- PathOps for resolving complex paths +- SkPictureShader for device-independent patterns + +Skia In Blink : Recording +- GraphicsContext (now) backed by SkPicture +-- draw commands are recorded for later playback +-- all parameters must be copied or (safely) ref'd +-- may record more than is currently visible +- Resulting picture may be replayed multiple times +-- from different thread(s) + +Skia In Blink : Recording response +- New implementation +- Optimized for recording speed +-- shallow copies whenever possible +-- rearchitect all Skia effects to be immutable +- Reentrant-safe for playback in multiple threads +-- also affected effect subclasses + +Skia In Blink : Playback +- Separate pass for optimizations (optional) +-- peep-holes rewrites +-- compute bounding-box hierarchy for faster tiling +-- can be done outside of Blink thread +- GPU optimizations +-- layer "hoisting" +-- distance fields : fonts and concave paths + +Skia In Blink : multi-picture-draw +- mpd(canvas[], picture[], matrix[], paint[]) +- Requires independent canvas objects +-- all other parameters can be shared +-- draw order is unspecified +- Examples +-- 1 picture drawing to multiple tiles (canvases) +-- multiple pictures each drawing to its own layer + +Skia In Blink : MPD optimizations* +- GPU +-- "layer hoisting" to reduce rendertarget switching +-- layer atlasing (also applies to imagefilters) +-- pre-uploading of textures +-- atlas yuv (from jpeg) to convert on gpu +- CPU +-- parallel execution using thread pool +-- pre-decoding of images based on visibility + +Skia : Roadmap + +Skia : Roadmap - performance +- GPU +-- extended OpenGL features (e.g. geometry shaders) +-- reordering for increased batching +-- support for new low-level OpenGL APIs +- CPU +-- SIMD applied to floats +-- smarter culling in pictures + +Skia : Roadmap - API +- Cross process support +- Direct support for sRGB +- Robust file format +- Support PDF viewing +- Stable C ABI +-- bindings for JS, Go, Python, Lua + +Demo |