1 # LibreOffice Impress / Draw Application
3 The core directory for the impress/draw applications.
5 Think of impress as a hack on top of draw.
7 `sd` module contains impress/draw specific code, non-shared UI and part
8 of `ppt` and `pptx` filter, few other filters too.
10 the slideshow UI lives here as well, the slideshow engine is in
11 `slideshow` module though (including the 3D transitions engine
12 `slideshow/source/engine/opengl`).
14 the most used filters are ODF's `odp`, binary ppt and OOXML's
15 `pptx`. their locations are listed below:
17 * `odp` import and export filters are in `xmloff` module (mostly `xmloff/source/draw`)
19 * `ppt` import is in `sd/source/filter/ppt` (big shared chunks are also in `svx`)
20 * `ppt` export is in `sd/source/filter/eppt` (big shared chunks are also in `svx`)
22 * `pptx` import is in `oox/source/ppt` (and uses a lot of
23 `oox/source/drawingml` and `oox/source/*`)
24 * `pptx` export is in `sd/source/filter/eppt` (mostly in `pptx-*` source
25 files) and shared part is in `oox/source/export`
27 ## PPTX Export / Import Filters
29 PPTX export filter is split into 2 parts. Impress related part is in
30 `sd/source/filter/eppt/pptx-*` and the other part is in
31 `oox/source/export/` because it contains mostly code related to
32 `DrawingML`, which is shared with writer and calc ooxml export.
34 The export filter was written in 2009 IIRC and was not much extended
38 Add custom shapes export (see below). enhance text
39 output, we don't write text style for indentation levels now, need to
40 export `a:lvl1pPr`, `a:lvl2pPr`, ... elements.
42 `PPTX` import was written by Sun/Oracle and then extended in LibreOffice
43 a lot during bug fixing. It is located in `oox/source/ppt` and
44 `oox/source/drawingml`. The areas with most bugs (at least until today)
45 were shape placeholders and text style inheritance.