Perf: Optimize background opacity calculation for high-res images#6276

KSSJW wants to merge 3 commits into

HMCL-dev:mainHMCL-dev/HMCL:mainfrom

KSSJW-Contribution:opacity-calculation-for-high-res-backgroundKSSJW-Contribution/HMCL:opacity-calculation-for-high-res-backgroundCopy head branch name to clipboard