kwin/plugins/scenes/CMakeLists.txt

add_subdirectory(qpainter)
if( KWIN_BUILD_XRENDER_COMPOSITING )
    add_subdirectory(xrender)
endif()
Move QPainter compositor into plugin This change is similar to D7232 and moves the scene_qpainter into a dedicated plugin. Compared to the XRender case it's more complicated as the platform plugins need to implement a platform specific backend. The base implementation for this part used to be in scene_qpainter. As the idea is to completly move it away from KWin core it would be point less to still have the backend definition in KWin core, but it cannot be in the scene plugin as otherwise all platforms need to link the plugin. To solve this a new platformsupport subdirectory is added which contains the scene platform backend as a static library. For the OpenGL scene such a static library will also be required. Test Plan: SceneQPainter test still passes, nested compositor still works Reviewers: #kwin, #plasma Subscribers: plasma-devel Tags: #plasma Differential Revision: https://phabricator.kde.org/D7259 2017-08-11 19:40:49 +00:00			`add_subdirectory(qpainter)`
Move SceneXRender into a plugin Summary: First step for loading the compositor Scenes through plugins. The general idea is that we currently needlessly pull in all the Scenes although only one will be used. E.g. on X11 we pull in QPainter, although they are not compatible. On Wayland we pull in XRender although they are not compatible. Furthermore our current Scene creation strategy is not really fault tolerant and can create situations where we don't get a compositor. E.g on fbdev backend the default settings won't work as it does not support OpenGL. Long term I want to tackle those conceptional problems together: we try to load all plugins supported by the current platform till we have a scene which works. Thus on Wayland we don't end up in a situation where we don't have a working compositor because the configuration is bad. To make this possible the switch statement in the Scene needs to go and needs to be replaced by a for loop iterating over all the available scenes on the platform. If we go there it makes sense to replace it directly with a plugin based approach. So this is a change which tackles the problem by first introducing the plugin loading. The xrender based scene (as it's the most simple one) is moved into a plugin. It is first tried to find a scene plugin and only if there is none the existing code is used. Test Plan: Tested all scenes Reviewers: #kwin, #plasma Subscribers: plasma-devel, kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D7232 2017-08-10 16:13:42 +00:00			`if( KWIN_BUILD_XRENDER_COMPOSITING )`
			`add_subdirectory(xrender)`
			`endif()`