74376c7628
since 02c4386a09 (in 2023)
move presenter console from sdext/ to sd/
Change-Id: Ia88cdf437aa5546b251fa0eb95cde8a6b6c64391
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/168347
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Jenkins
56 lines
2.2 KiB
Markdown
56 lines
2.2 KiB
Markdown
# LibreOffice Impress / Draw Application
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The core directory for the impress/draw applications.
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Think of impress as a hack on top of draw.
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`sd` module contains impress/draw specific code, non-shared UI and part
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of `ppt` and `pptx` filter, few other filters too.
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the slideshow UI lives here as well, the slideshow engine is in
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`slideshow` module though (including the 3D transitions engine
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`slideshow/source/engine/opengl`).
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the most used filters are ODF's `odp`, binary ppt and OOXML's
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`pptx`. their locations are listed below:
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* `odp` import and export filters are in `xmloff` module (mostly `xmloff/source/draw`)
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* `ppt` import is in `sd/source/filter/ppt` (big shared chunks are also in `svx`)
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* `ppt` export is in `sd/source/filter/eppt` (big shared chunks are also in `svx`)
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* `pptx` import is in `oox/source/ppt` (and uses a lot of
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`oox/source/drawingml` and `oox/source/*`)
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* `pptx` export is in `sd/source/filter/eppt` (mostly in `pptx-*` source
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files) and shared part is in `oox/source/export`
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## PPTX Export / Import Filters
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PPTX export filter is split into 2 parts. Impress related part is in
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`sd/source/filter/eppt/pptx-*` and the other part is in
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`oox/source/export/` because it contains mostly code related to
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`DrawingML`, which is shared with writer and calc ooxml export.
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The export filter was written in 2009 IIRC and was not much extended
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feature-wise lately.
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## Presenter Console
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The main screen uses a hardware-accelerated
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canvas (e.g. cairo canvas), while the entire secondary screen
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uses a VCL-canvas that is created in
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`sd::framework::FullScreenPane::CreateCanvas()`.
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The secondary screen contains 3 `Pane`s which each have
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2 `XWindows` for the border area & the actual content,
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and each content Pane is backed by a `sd::presenter::PresenterCanvas`
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that wraps the `FullScreenPane`'s canvas and does clipping.
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## Future Works
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Add custom shapes export (see below). enhance text
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output, we don't write text style for indentation levels now, need to
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export `a:lvl1pPr`, `a:lvl2pPr`, ... elements.
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`PPTX` import was written by Sun/Oracle and then extended in LibreOffice
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a lot during bug fixing. It is located in `oox/source/ppt` and
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`oox/source/drawingml`. The areas with most bugs (at least until today)
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were shape placeholders and text style inheritance.
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