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Overview
| Comment: | Fixed a few bugs in the Makefile in the www/image-format-vs-repo-size.md doc, and added a caveat about potential further bugs. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
82ad5914f101d867cb991a84071d3154 |
| User & Date: | wyoung 2019-03-24 18:56:57 |
Context
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2019-03-25
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| 06:18 | Typo fix, reported in the forum: administator. check-in: 1614c9b5 user: stephan tags: trunk | |
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2019-03-24
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| 18:56 | Fixed a few bugs in the Makefile in the www/image-format-vs-repo-size.md doc, and added a caveat about potential further bugs. check-in: 82ad5914 user: wyoung tags: trunk | |
| 18:50 | Added my two recently-created documents to the permuted doc index check-in: 41579b4c user: wyoung tags: trunk | |
Changes
Changes to www/image-format-vs-repo-size.md.
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## Automated Recompression Since programs that produce and consume binary-compressed data files often make it either difficult or impossible to work with the uncompressed form, we want an automated method for producing the uncompressed form to make Fossil happy while still having the compressed form to keep our content creation applications happy. This `Makefile` will do that for several different compressed file types: .SUFFIXES: .bmp .png .svg .svgz .svgz.svg: gzip -dc < $< > $@ .svg.svgz: ................................................................................ SS_FILES := $(wildcard spreadsheet/*) all: $(SS_FILES) illus.svg image.bmp doc-big.pdf reconstitute: illus.svgz image.png unzip spreadsheet.xlsx -d spreadsheet qpdf doc-small.pdf doc-big.pdf $(SS_FILES): spreadsheet.xlsx unzip $@ -d $< doc-big.pdf: doc-small.pdf qpdf --stream-data=uncompress $@ $< ................................................................................ 3. The raw data changes somewhat from one run to the next due to the use of random noise in the image to make the zlib/PNG compression more difficult, and the random pixel changes. Those test design choices make this a [Monte Carlo experient][mce]. We’ve found that the overall character of the results don’t change much from one run to the next. [git]: https://git-scm.com/ [lzw]: https://en.wikipedia.org/wiki/Lempel%E2%80%93Ziv%E2%80%93Welch [rs]: https://rsync.samba.org/ [us]: http://www.cis.upenn.edu/~bcpierce/unison/ |
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## Automated Recompression Since programs that produce and consume binary-compressed data files often make it either difficult or impossible to work with the uncompressed form, we want an automated method for producing the uncompressed form to make Fossil happy while still having the compressed form to keep our content creation applications happy. This `Makefile` should⁴ do that for BMP, PNG, SVG, and XLSX files: .SUFFIXES: .bmp .png .svg .svgz .svgz.svg: gzip -dc < $< > $@ .svg.svgz: ................................................................................ SS_FILES := $(wildcard spreadsheet/*) all: $(SS_FILES) illus.svg image.bmp doc-big.pdf reconstitute: illus.svgz image.png ( cd spreadsheet ; zip -9 ../spreadsheet.xlsx) * ) qpdf doc-big.pdf doc-small.pdf $(SS_FILES): spreadsheet.xlsx unzip $@ -d $< doc-big.pdf: doc-small.pdf qpdf --stream-data=uncompress $@ $< ................................................................................ 3. The raw data changes somewhat from one run to the next due to the use of random noise in the image to make the zlib/PNG compression more difficult, and the random pixel changes. Those test design choices make this a [Monte Carlo experient][mce]. We’ve found that the overall character of the results don’t change much from one run to the next. 4. The `Makefile` above is not battle-tested. Please report bugs and needed extensions [on the forum][for]. [for]: https://fossil-scm.org/forum/forumpost/15e677f2c8 [git]: https://git-scm.com/ [lzw]: https://en.wikipedia.org/wiki/Lempel%E2%80%93Ziv%E2%80%93Welch [rs]: https://rsync.samba.org/ [us]: http://www.cis.upenn.edu/~bcpierce/unison/ |