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362 lines
14 KiB
362 lines
14 KiB
This file lists TODO items for the compositing code. |
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See file COMPOSITE_HOWTO for setting up kwin_composite. |
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See file HACKING for details on developing KWin, including building |
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the kwin_composite branch. |
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See effects/howto.* for a HOWTO on writting effects. |
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See documentation in source (mainly in scene.cpp) for description |
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of the design of the compositing framework. |
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TODO |
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================================= |
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* = not done, will be either done by me, or should be at least discussed first with me |
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+ = not done, I don't plan on doing it that soon |
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- in other words, these should be the best ones for you if you want to help |
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! = like +, but they should be relatively simple |
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- in other words, these should be the best if you want to get started with the code |
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/ = work in progress |
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? = should it be done? |
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% = should be probably done later, during cleanups and preparations for being stable |
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KDE 4.0 TODO |
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================================= |
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- animations |
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- need to be faster (300ms at most) |
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- global setting? |
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/ configure dialog |
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- dump kompmgr settings |
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? - some simple basic settings in the Translucency config tab |
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- generic options |
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? - when enabling compositing, have a confirmation msgbox with 10-sec delay |
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as with resolution changes: if you don't click ok before timeout then |
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fall back to non-composited mode. |
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- shortcut configuration |
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- configurable per effect (in the options dialog) |
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- handle selecting mode |
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/ opengl vs xrender option |
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- tfp vs shm should not be needed |
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- different handling of differeng gfx cards |
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- check that nvidia/ati/intel work and add specific hacks if needed |
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- the same about driver versions |
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- default effects and their settings |
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- effects (to do) |
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- add configuration options (dialogs) |
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- add generic support to use effect only for certain window types [Seli] |
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- split effects to groups (eyecandy, accessibility, whatever) |
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- login effect, e.g. fade to desktop |
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- logout effect [Seli] |
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- effect for windows demanding attention |
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- rays? ripples? |
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- explosion |
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? - use for forcible killing (add support to windowClosed()) |
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- diminactive |
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* - needs grouping for unmanaged windows [Seli] |
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- trailfocus (windows keep getting darker over time) |
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* - inactive window notification (when it stops responding) [Seli] |
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- shadow |
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- xrender mode |
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- needs to follow the window shape |
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- make transparent |
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- make windows that are moved/resized by the user slightly transparent |
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- hide all testing, demo etc. effects in final builds |
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- presentwindows |
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- should show window icon, title (like boxswitch) |
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- boxswitch |
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- should share some features (next/previous, etc.) with presentwindows |
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? - duplicate code or try to share it? |
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- desktopgrid |
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- should preserve aspect ratio (as an option?) |
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- taskbar thumbnail [Seli] |
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- define protocol (with _KDE prefix for now?) |
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- add support to taskbar |
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- rollup animation when shading/unshading window [Seli] |
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- also use it for comboboxes |
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- select a region to zoom |
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- needs mouse to be warped |
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- fix inclusion of config-X11.h in installed headers [Seli] |
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- IHV database - set config settings according to card/driver |
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? - some sort of performance slider |
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? - undirect fullscreen windows |
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- fix shading |
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- window-specific rules need to apply to unmanaged windows as well (where applicable) |
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- some window-specific rules also related to compositing |
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- opacity |
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? generic dbus scripting support |
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/ check effects' dependencies when loading [rivo] |
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/ correct ordering for effects [rivo] |
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would be nice if isn't too strict |
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/ vertex redesign [Seli] |
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- handling of window pixmaps for unmapped windows [Seli] |
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- strict binding |
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- shm mode needs support for more data formats than GL_BGRA |
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? __GL_YIELD=NOTHING |
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- check what works with XRender |
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- more notification functions for effects |
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- documentation |
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- disable application effects when kwin can provide them, e.g. shadow/transparency |
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- since API won't be stable, a version check for modules is needed |
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General TODO |
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================================= |
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? alpha clear hack |
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- some decorations have parts transparent, probably because they don't expect |
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to have an alpha channel |
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- should be probably simply fixed in the decorations |
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- if not feasible, code that makes non-alpha windows opaque (SceneOpenGL::Window::prepareRenderStates()) |
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could be used to also ignore alpha channel of the decoration |
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? wait for decoration repaints |
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- it is sometimes visible that the window contents are painted first and the decoration |
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only afterwards with a small delay |
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? - this has been already greatly improved by r632378, so it's maybe not worth it anymore |
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- maybe posted paint events need to be processed immediatelly, or maybe the compositing |
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code should not update the window until the decoration is finished painting |
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? Expose events for overlay window - is it necessary to track it, like with root window? |
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% paint throttling |
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- there's 5ms grace period per repaint to avoid overloading the system with just compositing |
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and not letting the system do anything else - check and evaluate |
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% support for new window types from the wm spec for compositing |
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- this will have to be done in Qt, kdecore and kwin |
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* handle properly stacking order of deleted windows for showing in effects |
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* handle properly deleted windows that reappear (windowReadded() function?) |
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/ consider using an extra class for representing deleted windows |
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- cleaning up Client/Unmanaged instances may still leave e.g. timers around if they're overlooked |
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- an extra class could copy some interesting data and "replace" the old instance |
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% during screensaving, do no let non-screensaver windows show above screensaver |
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- kdesktop_lock watches for such things and raises again, but there's a small gap |
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% nvidia drivers by default use fake refresh rates as a workaround for some X limitations |
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- see the DynamicTwinView section in nvidia README |
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- this makes KWin repaint at a different rate than it should |
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/ handling of window pixmap for unmapped windows |
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- currently it's kept around after a window is unmapped |
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* - but it's still discarded on e.g. resize - how to solve this? |
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* - perhaps there should be an option not to unmap windows in order to always have live thumbnails |
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* - another option could be to unmap but quickly map when a live thumbnail is needed |
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* cursorPos() does not work reliably now (not from e.g. timers, it needs events), so it's disabled |
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* window grouping is not implemented for unmanaged windows (used e.g. by DimInactive) |
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% clean up and sort out shortcuts so that they don't conflict and make sense |
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- also make configurable etc. |
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% installed headers currently include config.h files to find out about e.g. OpenGL |
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- this needs to be sorted out somehow, installed headers shouldn't do this |
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? hidden previews currently needs input shape extension, otherwise the window can possibly interfere |
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- not very likely though, so is this worth bothering at all? |
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+ hidden preview has two modes unimplemented |
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OpenGL TODO |
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================================= |
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/ Check/make it work with other gfx cards |
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% Xgl support |
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- should work |
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- in SceneGL::Texture::findTarget() there is a hack that makes KWin work with XGL |
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without requiring KWin to be built against the libGL version that Compiz is |
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built against |
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% - that may not be necessary somewhen later |
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- interesting observation: normally run glxgears performs somewhat poorly compared |
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to normal nvidia mode, changing glxgears to be override-redirect (i.e. no reparenting) |
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however makes glxgears to be even faster than without any compositing at all, |
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in this case however kwin's redrawing speed drops somewhat |
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% AIGLX support |
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- should work |
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+ - it needs indirect rendering, should be autodetected and disabled somehow |
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% - may require LIBGL_ALWAYS_INDIRECT set with older X.org |
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(http://lists.kde.org/?l=kwin&m=116439615124838&w=2) |
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(http://lists.freedesktop.org/archives/xorg/2006-December/020323.html) |
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/ GL_ARB_texture_rectangle vs GL_ARB_texture_non_power_of_two |
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% - works; bugs in tfp_mode with power_of_two textures |
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- ati (others?): power_of_two windows are drawn white unless non-tfp_mode |
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is forced in findTextureTarget() |
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+ strict binding |
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- there is code to support strict binding as required by AIGLX, but it's disabled, because |
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copy_buffer in bindTexture() ensures strict binding as a side-effect |
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- since copy_buffer hack should be removed in the future, strict binding will need to be enabled then |
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- http://lists.kde.org/?l=kwin&m=116363084129170&w=2 |
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% bindTexture() optimize copied areas |
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- right now bindTexture() updates every damaged area and resets the window damage |
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- it might make things faster to update only areas that need to be repainted |
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and keep the rest damaged until needed |
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% clipping optimization |
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- like XRender code has paintTransformedScreen(), avoid painting parts that are |
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obscured (makes a difference with many windows open) |
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- http://lists.kde.org/?l=kwin&m=116585618111882&w=2 |
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/ shm mode needs support for more data formats than GL_BGRA |
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- http://www.xfree86.org/current/glTexImage2D.3.html |
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- this now works for 16bpp, but maybe not 15bpp or less |
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- endian issues? |
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% with current nvidia glXCreatePixmap in tfp mode fails with pixmaps 32x32 and smaller |
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/ vertices list (and possibly more things) should not be part of SceneOpenGL::Window |
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- otherwise drawWindow() used for thumbnails would use them too |
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- they should be probably part of WindowPaintData |
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% __GL_YIELD=NOTHING for NVidia reportedly improves perceived performance |
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- it needs to be set somehow (http://lists.kde.org/?l=kwin&m=117794153720348&w=2) |
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XRender TODO |
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============================== |
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+ SceneXrender::Window::performPaint() doesn't use saturation |
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+ SceneXrender::Window::performPaint() doesn't use brightness |
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+ SceneXrender::paintTransformedScreen() doesn't handle properly extending of painted area |
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in window's pre-paint - see the transformedShape() comment |
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Effects framework TODO |
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============================== |
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* more notification functions for effects are needed |
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- currently there are only very few notification functions (windowAdded, windowActivated,...) |
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! - window state changes |
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? more |
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/ shadows |
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+ - right now is only a rectangle, probably needs some shape support |
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+ - right now is only a flat black color, probably should be improved |
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/ support for grabbing input |
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- during some more complicated effects, input (at least mouse) should be disabled, |
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because currently there is no way to do input redirection |
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* PAINT_DISABLED turning off from effects needs some improvement |
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- a window may have painting disabled for various reasons and their numbers may increase |
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over time |
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- so e.g. an effect showing minimized windows cannot simply turn off DISABLED |
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for minimized windows, because it may be disabled also for other reasons |
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- there should be some utility function that will be called by the effect |
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with arguments saying which disabled windows it wants enabled |
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+ EffectWindow should be completely opaque when kept as the only API for effects |
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- no inlines, etc. |
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+ API for tabbox for effects should be cleaned up |
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* check Scene::updateTimeDiff() - should the time be 0 or 1? |
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% post calls are probably not necessary by now (http://lists.kde.org/?t=117770818100003&r=1&w=2) |
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% consider using http://lists.kde.org/?l=kwin&m=118094888517415&w=2 for notification functions |
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% API cleanups and making sure it will stay backwards compatible |
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? - should we try at all for 4.0? it will be probably still too "unstable" at that point |
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Effects TODO |
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=============================== |
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+ adapt the kcontrol module used by Kompmgr |
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- in kcmkwin/kwinoptions |
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! - uses ~/.xcompmgr, convert to use normal KConfig |
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? - I don't think these effects should be plugins or anything like that, |
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probably simply write to kwinrc and use the Option class in KWin |
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/ implements all effects Kompmgr could do |
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/ - shadows |
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+ - tab Effects |
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+ - fade between changes |
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- will need notification about opacity changes |
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- not sure if this is doable for other opacity changes then the ones |
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initiated by the user or by the application |
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+ minimize/shade effects |
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- to replace the ones from KWin core |
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/ - minimizing |
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- check support for it and the avoid_animation flag |
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+ - shading |
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- shading will probably need special support |
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/ zoom effect |
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- enlarge a portion of the screen |
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+ logout effect |
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* - should be triggered by ksmserver somehow |
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+ effects to replace widget effects (the ones in the Effects tab in "kcmshell style") |
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+ - needs support for new window types from the current draft of the EWMH WM spec |
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+ - needs patching Qt, netwm* classes in kdecore |
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/ showfps effect |
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- for debugging, just shows transparent fps in some corner |
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- just painting the number in paintScreen() should do, with glPushMatrix() and glLoadIdentity() |
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to avoid all transformations |
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+ - needs bindPixmapToTexture() or something like that, for displaying the text |
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- should also detect kwin being idle - it probably should detect in pre-paint that the only |
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damage is its own area and avoid damaging for the next round in post-paint |
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+ debugpaint effect |
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- should show what is damaged during each repaint step |
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- probably just e.g. paint a red almost transparent area over damaged areas |
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- needs special care to avoid causing infinite loops by its own damage (i.e. it damages |
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part of screen to clear its own painting, that triggers itself again next repaint) |
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? other effects |
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+ virtual desktop change effects |
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+ - ... yes, you guessed it, the cube |
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/ - something that presents all virtual desktops as being in grid (as in pager) |
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and zooms out of the old one and into the new one |
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- or whatever |
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/ present windows |
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+ - option to show windows with relative sizes to each other |
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/ scalein |
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+ - should scale in from e.g. 80%, not 0%, to just "pop up" |
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+ effect for drawing attention to windows demanding attention |
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* DimInactive flickers when switching between windows (temporarily no window becomes active) |
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+ generic class for shader effects |
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- focus effect (windows waves a little when it gets focus)
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