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https://chromium.googlesource.com/libyuv/libyuv
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38e21134f7
Add two new planar/row compositing functions for 32-bit ARGB/BGRA
scanlines:
- ARGBOr / ARGBOrRow_*: Applies a bitwise OR with a 32-bit ARGB mask
to every pixel (e.g., 0xFF000000 to force opaque alpha for BGRx to
BGRA conversion). Implemented for C, SSE2, AVX2, AVX-512BW, NEON
(32/64-bit), SVE2, SME, RVV, WASMSIMD, LSX, LASX, HVX, and Windows
intrinsics (row_win.cc).
- ARGBAlphaBlend / ARGBAlphaBlendRow_*: Implements straight-alpha
(unattenuated) Porter-Duff source-over blending matching PDFium's
CompositeRowBgra2Bgra:
dst_a = back_a + src_a - (back_a * src_a) / 255
ratio = (src_a * 255) / dst_a
dst_c = (back_c * (255 - ratio) + src_c * ratio) / 255
Implemented with bit-exact division by 255 across all 65,536
(back_a, src_a) pairs for C, SSSE3, AVX2, AVX-512BW, NEON
(32/64-bit), SVE2, SME, RVV, WASMSIMD, LSX, LASX, HVX, and Windows
intrinsics (row_win.cc).
ARGBOr Performance (2048x64 BGRx->BGRA scanlines, us per call):
uArch Before Highway libyuv vs Hwy
------------------------ ------ ------- ------- ------
Qualcomm Hexagon v81 HVX 259.63 260.97 15.78 16.54x
SiFive X280 (RVV) 1107.57 72.49 50.70 1.43x
SiFive X390 (RVV) 1108.82 70.42 52.26 1.35x
ARGBAlphaBlend Performance (2048x64 BGRA scanlines, us per call):
uArch Before Highway libyuv vs Hwy
------------------------ ------ ------- ------- ------
Intel Lion Cove (AVX2) 429.79 141.97 41.89 3.39x
Intel Cougar Cove (AVX2) 516.83 181.98 51.33 3.55x
Intel Golden Cove (AVX2) 560.31 206.28 67.08 3.08x
AMD Zen 3 (AVX2) 1025.73 251.09 98.99 2.54x
Wasm SIMD128 (V8) 1014.14 964.83 385.80 2.50x
Apple M6 Super (NEON) 221.90 118.42 46.35 2.55x
Apple M5 Super (NEON) 241.90 130.07 49.60 2.62x
ARM C1-Ultra (SME2) 384.63 112.52 63.62 1.77x
Qualcomm Oryon V3-L (SME) 388.13 154.87 87.65 1.77x
Qualcomm Oryon-L (NEON) 318.28 149.36 57.23 2.61x
ARM Cortex-X4 (SVE2) 675.47 213.56 102.53 2.08x
ARM Cortex-A720 (NEON) 795.85 586.55 235.81 2.49x
ARM Cortex-A520 (NEON) 2360.95 2122.99 787.65 2.70x
ARM Cortex-A35 (ARMv7) 4907.31 5895.04 1474.51 4.00x
SiFive X280 (RVV) 4145.06 1096.42 596.82 1.84x
SiFive X390 (RVV) 4144.57 1084.93 597.62 1.82x
Qualcomm Hexagon v81 HVX 4912.03 5786.25 952.19 6.08x
Coral V4 RVV (1024 px) 50276 c 48992 c 4299 c 11.40x
R=wtc@google.com
Bug: none
Change-Id: If661239826a033e89d4b5c1adc0bfdf048a7a726
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8647895
Reviewed-by: richard winterton <rrwinterton@gmail.com>
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| build_overrides | ||
| docs | ||
| include | ||
| infra/config | ||
| riscv_script | ||
| source | ||
| tools_libyuv | ||
| unit_test | ||
| util | ||
| .clang-format | ||
| .gitignore | ||
| .gn | ||
| Android.bp | ||
| Android.mk | ||
| AUTHORS | ||
| BUILD.bazel | ||
| BUILD.gn | ||
| CM_linux_packages.cmake | ||
| CMakeLists.txt | ||
| codereview.settings | ||
| DEPS | ||
| DIR_METADATA | ||
| download_vs_toolchain.py | ||
| GEMINI.md | ||
| libyuv.bzl | ||
| libyuv.gni | ||
| libyuv.gyp | ||
| libyuv.gypi | ||
| LICENSE | ||
| linux.mk | ||
| OWNERS | ||
| PATENTS | ||
| PRESUBMIT.py | ||
| public.mk | ||
| pylintrc | ||
| README.chromium | ||
| README.md | ||
| vpython.toml | ||
| vpython.toml.uv.lock | ||
| winarm.mk | ||
| WORKSPACE.bazel | ||
libyuv is an open source project that includes YUV scaling and conversion functionality.
- Scale YUV to prepare content for compression, with point, bilinear or box filter.
- Convert to YUV from webcam formats for compression.
- Convert to RGB formats for rendering/effects.
- Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
- Optimized for SSSE3/AVX2 on x86/x64.
- Optimized for Neon/SVE2/SME on Arm.
- Optimized for MSA on Mips.
- Optimized for RVV on RISC-V.
Development
See Getting started for instructions on how to get started developing.
You can also browse the docs directory for more documentation.