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diff --git a/oox/README b/oox/README index 43b60bd924d2..a1972fa5eef6 100644 --- a/oox/README +++ b/oox/README @@ -2,3 +2,188 @@ Support for Office Open XML, the office XML-format designed by Microsoft. See also: [http://wiki.services.openoffice.org/wiki/OOX] + +== DrawingML Custom shapes and presets == + +custom shapes are part of DrawingML and are different to binary ppt +and VML in older formats, so we needed to add new code to work with +these. the import happens in oox/source/drawingml, where they are +imported as LO's enhanced custom shape's. see +offapi/com/sun/star/drawing/CustomShape.idl and +offapi/com/sun/star/drawing/EnhancedCustomShape*.idl + +the export is quite behind now, as it was done before we started work +on fully supporting drawingml custom shapes. (see FUTURE WORK below) + +example of drawingml preset: + + <a:prstGeom prst="star5"> + <a:avLst/> + </a:prstGeom> + +example of drawingml custom shape (equal to star5 preset): + + <avLst xmlns="http://schemas.openxmlformats.org/drawingml/2006/main"> + <gd name="adj" fmla="val 19098" /> + <gd name="hf" fmla="val 105146" /> + <gd name="vf" fmla="val 110557" /> + </avLst> + <gdLst xmlns="http://schemas.openxmlformats.org/drawingml/2006/main"> + <gd name="a" fmla="pin 0 adj 50000" /> + <gd name="swd2" fmla="*/ wd2 hf 100000" /> + <gd name="shd2" fmla="*/ hd2 vf 100000" /> + <gd name="svc" fmla="*/ vc vf 100000" /> + <gd name="dx1" fmla="cos swd2 1080000" /> + <gd name="dx2" fmla="cos swd2 18360000" /> + <gd name="dy1" fmla="sin shd2 1080000" /> + <gd name="dy2" fmla="sin shd2 18360000" /> + <gd name="x1" fmla="+- hc 0 dx1" /> + <gd name="x2" fmla="+- hc 0 dx2" /> + <gd name="x3" fmla="+- hc dx2 0" /> + <gd name="x4" fmla="+- hc dx1 0" /> + <gd name="y1" fmla="+- svc 0 dy1" /> + <gd name="y2" fmla="+- svc 0 dy2" /> + <gd name="iwd2" fmla="*/ swd2 a 50000" /> + <gd name="ihd2" fmla="*/ shd2 a 50000" /> + <gd name="sdx1" fmla="cos iwd2 20520000" /> + <gd name="sdx2" fmla="cos iwd2 3240000" /> + <gd name="sdy1" fmla="sin ihd2 3240000" /> + <gd name="sdy2" fmla="sin ihd2 20520000" /> + <gd name="sx1" fmla="+- hc 0 sdx1" /> + <gd name="sx2" fmla="+- hc 0 sdx2" /> + <gd name="sx3" fmla="+- hc sdx2 0" /> + <gd name="sx4" fmla="+- hc sdx1 0" /> + <gd name="sy1" fmla="+- svc 0 sdy1" /> + <gd name="sy2" fmla="+- svc 0 sdy2" /> + <gd name="sy3" fmla="+- svc ihd2 0" /> + <gd name="yAdj" fmla="+- svc 0 ihd2" /> + </gdLst> + <ahLst xmlns="http://schemas.openxmlformats.org/drawingml/2006/main"> + <ahXY gdRefY="adj" minY="0" maxY="50000"> + <pos x="hc" y="yAdj" /> + </ahXY> + </ahLst> + <cxnLst xmlns="http://schemas.openxmlformats.org/drawingml/2006/main"> + <cxn ang="3cd4"> + <pos x="hc" y="t" /> + </cxn> + <cxn ang="cd2"> + <pos x="x1" y="y1" /> + </cxn> + <cxn ang="cd4"> + <pos x="x2" y="y2" /> + </cxn> + <cxn ang="cd4"> + <pos x="x3" y="y2" /> + </cxn> + <cxn ang="0"> + <pos x="x4" y="y1" /> + </cxn> + </cxnLst> + <rect l="sx1" t="sy1" r="sx4" b="sy3" xmlns="http://schemas.openxmlformats.org/drawingml/2006/main" /> + <pathLst xmlns="http://schemas.openxmlformats.org/drawingml/2006/main"> + <path> + <moveTo> + <pt x="x1" y="y1" /> + </moveTo> + <lnTo> + <pt x="sx2" y="sy1" /> + </lnTo> + <lnTo> + <pt x="hc" y="t" /> + </lnTo> + <lnTo> + <pt x="sx3" y="sy1" /> + </lnTo> + <lnTo> + <pt x="x4" y="y1" /> + </lnTo> + <lnTo> + <pt x="sx4" y="sy2" /> + </lnTo> + <lnTo> + <pt x="x3" y="y2" /> + </lnTo> + <lnTo> + <pt x="hc" y="sy3" /> + </lnTo> + <lnTo> + <pt x="x2" y="y2" /> + </lnTo> + <lnTo> + <pt x="sx1" y="sy2" /> + </lnTo> + <close /> + </path> + </pathLst> + +we needed to extend our custom shapes for missing features and so 5 +new segment commands were added. G command for arcto drawingml record +and H I J K commands for darken, darkenless, lighten, lightenless +records. the commands are save into ODF in special namespace drawooo, +which is extension not yet in the standard. Thorsten suggested to put +it in such a namespace and keep original (incomplete) geometry for +backward compatibility, before we can extend the ODF. that's why you +will see 2 of them in cases where some of the new commands was +needed. Radek backported code for the new commands to 3-6 +and 4-0 branches. + +the drawingml also contains new presets (compared to binary/VML) and +so we now have code with these presets - they are basicallly +predefined custom shapes. we generate them using scripts in +oox/source/drawingml/customshapes/ and the output are +oox/source/drawingml/customshapepresets[123456].cxx source files +containing the definition for the preset shapes. this mean that we +import presets from OOXML files perfectly. one area to look at might +be check how handles on the imported custom shapes (and presets) +wotk. + +the source code generation happens in these steps: + + * generate pptx files by running generatePresetsPPTXs.pl. it + generates files in pptx/ from cshape.pptx sample - replacing + slide1.xml in it and placing it in new file in pptx/ named after + the preset plus one cshape-all.pptx file all the presets + + * build oox module with debug (ie. make -s debug=t dbglevel=2) + + * import cshape-all.pptx into impress and redirect output to + custom-shapes.log + + * generate cxx files by running generatePresetsCXX.pl - it uses + debug output from the custom-shapes.log file and prepares the C++ + source code + + * check generated source code files customshapepresets[123456].cxx + and move them to oox/source/drawingml/ + + * build oox with new source files and test + +while importing presets, we also set the name of the custom shape so +that we can detect it on export as save it again as preset. + +the scripts in oox/source/drawingml/customshapes/ also generate pptx +files for signle presets and also for all presets +cshape-all.pptx. the cshape-all.pptx file is then loaded into impress +build with debug enabled in oox and the command line output contains +information, which are used by generatePresetsCXX.pl. redirect the +output into custom-shapes.log in oox/source/drawingml/customshapes/ +and run the script. it creates the customshapepresets[123456].cxx +source files with presets definitions. also the generated pptx files +can be used when debugging bugs in custom shapes import/export. also +the cshape-all.pptx can be used to test the round trips. there's small +problem with these pptx as they cannot be imported into powerpoint, +but that can be fixed quickly. when fixed, we can use it to +test powerpoint odp export and see how complete it is regarding +custom shapes. OpenXML SDK tools might help when fixing +cshape-all.pptx +http://www.microsoft.com/en-us/download/details.aspx?id=30425 + +FUTURE WORK: because we have to make sure that all the roundtrips +like PPTX --> ODP --> PPTX work correctly and doesn't loose data. +the only problematic part is probably saving custom shapes (ie. not +presets) to PPTX. that part of code predates work on custom shapes +and is unable to export general custom shapes yet. it will need a bit +of work as LO has more complex equations than DrawingML. other parts +should work OK, PPTX --> ODP should work and don't loose any +data. presets should already survive PPTX --> ODP --> PPTX roundtrip |