f51e1fd37d
The gist here is to use saveLayer() to create a buffer to draw each
subframe into, but not actually use it to draw anything at restore()
time, hence, canvas->clear(0). (SkCanvas sniffs out cleverer approaches
like 0 alpha or SkBlendMode::kDst.)
Instead, we accessTopLayerPixels() and slurp the subframe out into a
16-bit accumulator, then when all subframes have drawn and accumulated
there, one more saveLayer() and accessTopLayerPixels() lets us put them
back, shifting back down to 8-bit.
The hot parts of the profile are drawing the frames themselves, then the
accumulate / repack code in renderToRaster8888Pow2Samples().
$ time out/skottie_tool -i ~/Downloads/mb/data.json -w bar
Before: 28.39user 1.14system 0:29.54elapsed
After: 22.08user 1.12system 0:23.21elapsed
I'm not proud of it.
...
...
...
I am a bit!
Now using one layer.
Change-Id: I241529fad4c5b55c6abc55793f2d9c9693a03c18
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/242853
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
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| animations | ||
| bench | ||
| bin | ||
| build_overrides | ||
| dm | ||
| docker | ||
| docs/examples | ||
| example | ||
| experimental | ||
| fuzz | ||
| gm | ||
| gn | ||
| include | ||
| infra | ||
| modules | ||
| platform_tools | ||
| resources | ||
| samplecode | ||
| site | ||
| specs | ||
| src | ||
| tests | ||
| third_party | ||
| tools | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitignore | ||
| .gn | ||
| AUTHORS | ||
| BUILD.gn | ||
| codereview.settings | ||
| CONTRIBUTING | ||
| CQ_COMMITTERS | ||
| DEPS | ||
| go.mod | ||
| go.sum | ||
| LICENSE | ||
| OWNERS | ||
| PRESUBMIT.py | ||
| public.bzl | ||
| README | ||
| README.chromium | ||
| RELEASE_NOTES.txt | ||
| whitespace.txt | ||
Skia is a complete 2D graphic library for drawing Text, Geometries, and Images. See full details, and build instructions, at https://skia.org.