| commit | afcc01f161a4efd15a8bfd212423ac21f3d02e0c | [log] [tgz] |
|---|---|---|
| author | Ashod Nakashian <ashod.nakashian@collabora.co.uk> | Sat Jun 04 21:29:30 2016 -0400 |
| committer | Ashod Nakashian <ashod.nakashian@collabora.co.uk> | Sun Jun 05 10:53:06 2016 -0400 |
| tree | 7670f1f1f68ed30766d923e88671ba0b5aed884d | |
| parent | 86c980482fbaeccc4ca23e2fa3525bfbff06df17 [diff] |
LOK: fast tile rendering (graphics and buttons) Since embedded graphics and buttons use absolute coordinates, we set the origin to be the top-left corner of the tile. This includes the origin + ScrPos (see previous patch). Then, the coordinates of the graphic is shifted by this amount to make sure it renders in its relative position to the tile. This renders embedded graphics and buttons at their correct position, with some limitations. Tiles large enough to cover a graphic object show the graphic object where it should be. However, rendering a relatively small tile doesn't render the graphic. This seems to be an issue with moving the graphic's coordinate at a later stage than the 2D Processor decides what objects intersect with the 'view area' that is rendered. Another issue is that graphs don't render. What they seem to suffer is incorrect scale and a fix coordinates (they show up as tiny thumbnails at the top-left corner and grow in proportion to the real graph when resized). These shall be addressed in a separate patch. Change-Id: I4b71bf5f2e357d1114d46022bc00905ceed0c2f9
A quick overview of the LibreOffice code structure.
You can develop for LibreOffice in one of two ways, one recommended and one much less so. First the somewhat less recommended way: it is possible to use the SDK to develop an extension, for which you can read the API docs here and here. This re-uses the (extremely generic) UNO APIs that are also used by macro scripting in StarBasic.
The best way to add a generally useful feature to LibreOffice is to work on the code base however. Overall this way makes it easier to compile and build your code, it avoids any arbitrary limitations of our scripting APIs, and in general is far more simple and intuitive - if you are a reasonably able C++ programmer.
Each module should have a README file inside it which has some degree of documentation for that module; patches are most welcome to improve those. We have those turned into a web page here:
However, there are two hundred modules, many of them of only peripheral interest for a specialist audience. So - where is the good stuff, the code that is most useful. Here is a quick overview of the most important ones:
| Module | Description |
|---|---|
| sal/ | this provides a simple System Abstraction Layer |
| tools/ | this provides basic internal types: 'Rectangle', 'Color' etc. |
| vcl/ | this is the widget toolkit library and one rendering abstraction |
| framework | UNO framework, responsible for building toolbars, menus, status bars, and the chrome around the document using widgets from VCL, and XML descriptions from /uiconfig/ files |
| sfx2/ | legacy core framework used by Writer/Calc/Draw: document model / load/save / signals for actions etc. |
| svx/ | drawing model related helper code, including much of Draw/Impress |
Then applications
| Module | Description |
|---|---|
| desktop/ | this is where the 'main' for the application lives, init / bootstrap. the name dates back to an ancient StarOffice that also drew a desktop |
| sw/ | Writer |
| sc/ | Calc |
| sd/ | Draw / Impress |
There are several other libraries that are helpful from a graphical perspective:
| Module | Description |
|---|---|
| basebmp/ | enables a VCL compatible rendering API to render to bitmaps, as used for LibreOffice Online, Android, iOS, etc. |
| basegfx/ | algorithms and data-types for graphics as used in the canvas |
| canvas/ | new (UNO) canvas rendering model with various backends |
| cppcanvas/ | C++ helper classes for using the UNO canvas |
| drawinglayer/ | View code to render drawable objects and break them down into primitives we can render more easily. |
Beyond this, you can read the README files, send us patches, ask on the mailing list libreoffice@lists.freedesktop.org (no subscription required) or poke people on IRC #libreoffice-dev on irc.freenode.net - we're a friendly and generally helpful mob. We know the code can be hard to get into at first, and so there are no silly questions.