[
https://issues.apache.org/jira/browse/TIKA-4855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18110367#comment-18110367
]
Hudson commented on TIKA-4855:
------------------------------
SUCCESS: Integrated in Jenkins build Tika ยป tika-main-jdk17 #1608 (See
[https://ci-builds.apache.org/job/Tika/job/tika-main-jdk17/1608/])
TIKA-4855: Render EMF/WMF through POI and emit the OLE2 SummaryInformation
thumbnail (#3095) (github:
[https://github.com/apache/tika/commit/1e3d8f888380d8b302ce4787bc7d5fbb513f1867])
* (edit) CHANGES.txt
* (add)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/AbstractMetafileParser.java
* (edit)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/EMFParser.java
* (edit)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/test/java/org/apache/tika/parser/microsoft/PowerPointParserTest.java
* (add)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/test/resources/configs/tika-config-emf-render.json
* (add)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/MetafileRendering.java
* (add)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/renderer/microsoft/POIMetafileRenderer.java
* (add)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/MetafileParserConfig.java
* (edit)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/WMFParser.java
* (edit)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/SummaryExtractor.java
* (edit)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/OfficeParser.java
* (edit)
tika-parsers/tika-parsers-standard/tika-parsers-standard-integration-tests/src/test/java/org/apache/tika/parser/microsoft/POIContainerExtractionTest.java
* (add)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/test/java/org/apache/tika/parser/microsoft/OLE2ThumbnailTest.java
* (edit)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/test/java/org/apache/tika/parser/microsoft/EMFParserTest.java
* (edit)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/test/java/org/apache/tika/parser/microsoft/WMFParserTest.java
* (edit)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/OfficeParserConfig.java
> Render EMF/WMF images to raster previews and emit the OLE2 SummaryInformation
> thumbnail
> ---------------------------------------------------------------------------------------
>
> Key: TIKA-4855
> URL: https://issues.apache.org/jira/browse/TIKA-4855
> Project: Tika
> Issue Type: Improvement
> Reporter: Dominik Schmidt
> Priority: Major
> Fix For: 4.1.0
>
>
> Office documents carry their preview image as a vector metafile: the OOXML
> docProps/thumbnail.emf of Word (an EMF wrapping a WMF) and thumbnail.wmf of
> Excel, and the SummaryInformation thumbnail (PIDSI_THUMBNAIL,
> CF_METAFILEPICT, a WMF) of the OLE2 formats, which PowerPoint writes almost
> always and Word/Excel on request. Neither is usable as a preview outside
> Windows, and outside the JVM there is no maintained EMF/WMF rasterizer. POI's
> HEMF/HWMF can draw both and Tika already bundles them.
> Proposal, following the PDF parser's rendering design:
> 1. A Renderer for image/emf and image/wmf (POI HemfPicture/HwmfPicture drawn
> onto a white canvas, a PNG of a configurable width, the height following the
> aspect ratio). The WMF thumbnails Word writes consist of a setWindowExt and a
> dibStretchBlt record only, for which POI cannot compute bounds; for those the
> renderer emits the record's bitmap.
> 2. EMFParser and WMFParser implement RenderingParser and, with "emf-parser" /
> "wmf-parser": {"renderImage": true, "renderWidth": 800} (off by default),
> emit the rendering as a RENDERING embedded document named after the image,
> the way the PDF parser emits page renderings. An injected renderer is used
> when it supports the type, the POI one otherwise.
> 3. OfficeParser emits the SummaryInformation thumbnail of the OLE2 formats as
> a THUMBNAIL embedded document (image/wmf, named thumbnail.wmf), consistent
> with the docProps thumbnail of the OOXML parsers. Existing tests that count
> the embedded documents of .ppt fixtures gain one.
> With that, a client that asks for THUMBNAIL and RENDERING embedded documents
> gets a raster preview for docx, xlsx, doc, xls and ppt files that carry a
> thumbnail, with the same request it uses for every other format. Verified
> against tika-server with /unpack: each of these yields the thumbnail at depth
> 1 and its PNG rendering at depth 2.
> Note for clients: with rendering enabled every embedded metafile is rendered,
> e.g. the picture of an OLE object, so the preview is the RENDERING under the
> THUMBNAIL, not the first RENDERING.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
