Comment 18 for bug 505188
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#18 |
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0e1f616
(Get the code!)
Created attachment 55747
Test .ppt and mangled result
1. mangle.ppt is the original drawing created in PPT 2003
2. open mangle.ppt in LOImpress 3.5.0b2
3. add one word to the slide, outside the diagram
4. save as mangle2.ppt
5. exit LOImpress
6. Open mangle2.ppt in LOImpress or PPT 2003
Result: some of the text which was originally horizontal has rotated to vertical.
3.4.4 release does exactly the same thing.
I just went through a .ppt file I had been using to import .pdf (as a way of converting SVG drawings) which had been repeatedly opened in LOImpress 3.4.4. There were numerous examples of mangled diagrams, mostly text originally rotated by 90 degrees now at -90 degrees, and a few cases where the rotation was completely lost (not shown). Some of them were really awful, with text drawn mirrored, possibly the result of multiple cycles of .ppt open/save in LOImpress. (I have not yet reproduced that problem.)
Conclusion: it is unsafe to open a .ppt drawing in LOImpress and save it again in that same format. The only safe way to convert (from PDF) through LO is to create a fresh .ppt for each diagram imported and then later move the contents of that .ppt into the main .ppt within Microsoft PowerPoint. The "easy" method, doing that conversion in the complete .ppt opened in LOImpress, results in earlier slides being mangled by later .ppt saves.