Add SSE4.1 optimizations of ImagePngLoader decode line handlers - #948
Merged
Conversation
Vectorize PNG unfiltering (_decodeLine[0..6]) in Sse41::ImagePngLoader and document the change in release 7.2.166. Co-authored-by: igor.ermolaev <igor.ermolaev@altezza.org>
ermig1979
marked this pull request as ready for review
September 8, 2026 07:48
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Adds SSE4.1 implementations of PNG unfiltering handlers
_decodeLine[0..6]forSse41::ImagePngLoader, matching the baseDecodeLine0–DecodeLine6functions inSimdBaseImageLoadPng.cpp.Changes
SimdSse41ImageLoadPng.cpp.Sse41::ImagePngLoader::SetHandlers().docs/2026.html).Testing
srcNin {1,2,3,4,6,8}, equal and expand (srcN != dstN) paths, and a range of row widths: all passed../Test -m=s -fi=ImageLoadFromMemory:ImageLoadFromMemorySpecialTestpassed on the PNG test suite (Base vs SIMD)../Test -m=a -fi=ImageLoadFromMemory:ImageLoadFromMemoryAutoTestpassed for Gray8/Bgr24/Bgra32/Rgb24/Rgba32 PNG (Base, SSE4.1, AVX2).