f720098671
Add lowp variants for most stages in SkSplicer. These double the number of pixels handled by representing each channel with 16 bits, ranging from 0x0000 as 0 to 0x8000 as 1. This format lets us use the Q15 multiply instructions available in NEON and SSSE3 at full register width, with a little platform-specific fix up to smooth over the fact that these aren't quite Q15 values. When a lowp stage is unavailable, the entire pipeline upgrades to floats. So by simply not implementing sRGB, f16, matrix multiplication, etc, we naturally express that they're best handled with floats. These lowp stages ended up different enough that I've found it clearer to have them live in their own files, noting where they differ from the float stages. HSW, aarch64, and armv7 are all supported. I've seen very good things performance-wise on all platforms. Change-Id: Ib4f820c6665f2c9020f7449a2b51bbaf6c408a63 Reviewed-on: https://skia-review.googlesource.com/7098 Reviewed-by: Herb Derby <herb@google.com> Commit-Queue: Mike Klein <mtklein@chromium.org> |
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| bench | ||
| bin | ||
| debugger | ||
| dm | ||
| example | ||
| experimental | ||
| fuzz | ||
| gm | ||
| gn | ||
| gyp | ||
| include | ||
| infra | ||
| platform_tools | ||
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| samplecode | ||
| site | ||
| src | ||
| tests | ||
| third_party | ||
| tools | ||
| .clang-format | ||
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| AUTHORS | ||
| BUILD.gn | ||
| codereview.settings | ||
| CONTRIBUTING | ||
| CQ_COMMITTERS | ||
| DEPS | ||
| Doxyfile | ||
| gyp_skia | ||
| gyp_skia.py | ||
| LICENSE | ||
| OWNERS | ||
| PRESUBMIT.py | ||
| public.bzl | ||
| README | ||
| README.chromium | ||
| skia.gyp | ||
| 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.