optimize

Imports

• alicode.mukj.cn/yjkj.ink/work/unidoc/unipdf/common
• alicode.mukj.cn/yjkj.ink/work/unidoc/unipdf/contentstream
• alicode.mukj.cn/yjkj.ink/work/unidoc/unipdf/core
• alicode.mukj.cn/yjkj.ink/work/unidoc/unipdf/extractor
• alicode.mukj.cn/yjkj.ink/work/unidoc/unipdf/internal/imageutil
• alicode.mukj.cn/yjkj.ink/work/unidoc/unipdf/internal/textencoding
• alicode.mukj.cn/yjkj.ink/work/unidoc/unipdf/model
• alicode.mukj.cn/yjkj.ink/work/unidoc/unitype
• golang.org/x/image/draw

Standard library imports

• bytes
• crypto/md5
• errors
• math