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下表列出了screen回调函数注册过程，从左至右注册，从右至左调用。为紧凑表格，将一些插件功能合成一列记录。DestroyWindow、DestroyPixmap和CloseScreen调用层次深在下表后单独列出。所有功能基本都须注册CloseScreen回调函数回收资源。
callback name | framebuffer / mi | damage / RandR | curse/ xfee86 / modesetting | composite | double buffer |
|---|
CreateWindow | fbCreateWindow | | | compCreateWindow | |
PositionWindow | fbPositionWindow | | | compPositionWindow | miDbePositionWindow |
ChangeWindowAttributes | fbChangeWindowAttributes | | | compChangeWindowAttributes | |
RealizeWindow | fbRealizeWindow | | | compRealizeWindow | |
UnrealizeWindow | fbUnrealizeWindow | | | compUnrealizeWindow | |
CopyWindow | fbCopyWindow | damageCopyWindow | miSpriteCopyWindow | compCopyWindow | |
WindowExposures | miWindowExposures | | xf86XVWindowExposures | | |
MoveWindow | miMoveWindow | | | compResizeWindow | |
ReparentWindow | | | | compReparentWindow | |
ChangeBorderWidth | miChangeBorderWidth | | | compChangeBorderWidth | |
ConfigNotify | | | DRI2ConfigNotify | compConfigNotify | |
SetWindowPixmap | _fbSetWindowPixmap | damageSetWindowPixmap | | | |
ModifyPixmapHeader | miModifyPixmapHeader | | | | |
ReplaceScanoutPixmap | | RRReplaceScanoutPixmap | | | |
SharePixmapBacking | msSharePixmapBacking | | | | |
SetSharedPixmapBacking | msSetSharedPixmapBacking | | PixmapStartDirtyTracking | | |
StartPixmapTracking | StopPixmapTracking | | PixmapStopDirtyTracking | | |
SharedPixmapNotifyDamage | | | msSharedPixmapNotifyDamage | | |
RequestSharedPixmapNotifyDamage | | | msRequestSharedPixmapNotifyDamage | | |
PresentSharedPixmap | | | msPresentSharedPixmap | | |
StopFlippingPixmapTracking | | | msStopFlippingPixmapTracking | | |
DisplayCursor | miPointerDisplayCursor | | CursorDisplayCursor | | |
RecolorCursor | miRecolorCursor | | | | |
QueryBestSize | fbQueryBestSize | | xf86CursorQueryBestSize | | |
ConstrainCursorHarder | | RRConstrainCursorHarder | xf86RandR13ConstrainCursorHarder | | |
ClipNotify | | | xf86XVClipNotify | compClipNotify | |
CreateGC | fbCreateGC | damageCreateGC | | | |
CreateColormap | fbInitializeColormap | | CMapCreateColormap | | |
DestroyColormap | | | CMapDestroyColormap | | |
StoreColors | PictureStoreColors | | miSpriteStoreColors / CMapStoreColors | | |
SourceValidate | miSourceValidate | | miSpriteSourceValidate | | |
DestroyWindow ： fbDestroyWindow -> PictureDestroyWindow -> damageDestroyWindow -> XvDestroyWindow -> xf86XVDestroyWindow -> compDestroyWindow -> DbeDestroyWindow
DestroyPixmap ： fbDestroyPixmap -> glamor_egl_destroy_pixmap -> damageDestroyPixmap -> XvDestroyPixmap -> ShmDestroyPixmap
CloseScreen ： fbCloseScreen -> PictureCloseScreen -> glamor_egl_close_screen -> dri3_close_screen -> miDCCloseScreen -> damageCloseScreen -> miPointerCloseScreen -> miSpriteCloseScreen -> xf86CursorCloseScreen -> CloseScreen -> RRCloseScreen -> CMapCloseScreen -> XvCloseScreen -> xf86XVCloseScreen -> xf86RandRCloseScreen -> CursorCloseScreen -> compCloseScreen -> dri3_close_screen
machine-indepent only
callback name | machine-indepent |
|---|
ValidateTree | miValidateTree |
PaintWindow | miPaintWindow |
MarkWindow | miMarkWindow |
MarkOverlappedWindows | miMarkOverlappedWindows |
XYToWindow | miXYToWindow |
MarkUnrealizedWindow | miMarkUnrealizedWindow |
GetLayerWindow | miGetLayerWindow |
GetScreenPixmap | miGetScreenPixmap |
SetScreenPixmap | miSetScreenPixmap |
HandleExposures | miHandleValidateExposures |
ConstrainCursor | miPointerConstrainCursor |
CursorLimits | miPointerCursorLimits |
RealizeCursor | miPointerRealizeCursor |
UnrealizeCursor | miPointerUnrealizeCursor |
SetCursorPosition | miPointerSetCursorPosition |
DeviceCursorInitialize | miPointerDeviceInitialize |
DeviceCursorCleanup | miPointerDeviceCleanup |
SetShape | miSetShape |
ClearToBackground | miClearToBackground |
CreateScreenResources | miCreateScreenResources |
framebuffer only
callback name | framebuffer |
|---|
CreatePixmap | fbCreatePixmap |
GetWindowPixmap | _fbGetWindowPixmap |
GetImage | fbGetImage |
GetSpans | fbGetSpans |
RealizeFont | fbRealizeFont |
UnrealizeFont | fbUnrealizeFont |
UninstallColormap | fbUninstallColormap |
ListInstalledColormaps | fbListInstalledColormaps |
ResolveColor | fbResolveColor |
BitmapToRegion | fbPixmapToRegion |
xfree86 only
callback name | xfree86 |
|---|
LoadPalette | loadPalette |
SetOverscan | CMapEnterVT / xf86XVEnterVT |
LeaveVT | xf86XVLeaveVT |
SwitchMode | CMapSwitchMode |
ChangeGamma | CMapChangeGamma |
AdjustFrame | xf86XVAdjustFrame |
ModeSet | xf86XVModeSet |
EnableDisableFBAccess | xf86EnableDisableFBAccess |
SaveScreen | xf86SaveScreen |
附录
InitOutput函数调用流程
回调函数以实际调用函数代替。以xserver源码的xwayland-23版本为基础，显卡驱动为modesetting。若显卡驱动不同，如：Intel、amdgpu、nouveau，驱动相关驱动流程有差异。一般来说，modesetting驱动满足显示要求，渲染部分有OpenGL/EGL使用对应DRI驱动即可。
InitOutput (hw/xfree86/common/common/xf86Init.c)
-> config_pre_init
-> config_udev_pre_init
-> LoaderSetPath
-> dbus_core_init
-> systemd_logind_init
-> xf86BusProbe (discover display card)
-> xf86AutoConfig (load modesetting drivers)
-> xf86allocateConfig
-> listPossibleVideoDrivers
-> xf86AddMatchedDriver ("modesetting")
-> xf86AddMatchedDriver ("fbdev")
-> xf86AddMatchedDriver ("vesa")
-> xf86initConfigFiles
-> xf86setBuiltinConfig
-> xf86HandleConfigFile
-> xf86OSPMOpen
-> xf86ExtensionInit (not load extension)
-> autoConfigDevice
-> xf86LoadModules (xf86DriverlistFromConfig, modesetting)
-> Setup (hw/xfree86/drivers/modesetting/driver.c)
-> xf86AddDriver (modesetting)
-> Identify (hw/xfree86/drivers/modesetting/driver.c)
-> ms_driver_func (hw/xfree86/drivers/modesetting/driver.c)
-> xf86OpenConsole
-> xf86BusConfig
-> xf86CallDriverProbe
-> xf86platformProbeDev
-> xf86ConfigPciEntity
-> xf86GetDevFromEntity
-> xf86FindOptionValue
-> probe_hw_pci
-> ms_setup_scrn_hooks
-> ms_setup_entity
-> xf86platformAddGPUDevices
-> xf86VGAarbiterInit
-> xf86PostProbe
-> PreInit (hw/xfree86/drivers/modesetting/driver.c)
-> xf86SetPrimInitDone
-> ms_get_drm_master_fd
-> xf86_platform_device_odev_attributes
-> open_hw (open)
-> check_outputs
-> drmModeGetResources
-> drmmode_get_default_bpp
-> xf86SetDepthBpp
-> xf86CollectOptions
-> xf86ProcessOptions
-> xf86SetWeight
-> xf86SetDefaultVisual
-> xf86ReturnOptValBool (OPTION_SW_CURSOR)
-> drmGetCap (DRM_CAP_CURSOR_WIDTH / DRM_CAP_CURSOR_HEIGHT)
-> try_enable_glamor
-> load_glamor
-> xf86LoadSubModule ("glamoregl")
-> glamor_egl_init
-> xf86ProcessOptions
-> xf86GetOptValString (GLAMOREGLOPT_VENDOR_LIBRARY)
-> glamor_set_glvnd_vendor
-> xf86GetOptValString (GLAMOREGLOPT_RENDERING_API)
-> gbm_create_device
-> glamor_egl_get_display
-> eglInitialize
-> glamor_egl_try_big_gl_api
-> glGetString (GL_RENDERER)
-> xf86GetOptValBool (OPTION_VARIABLE_REFRESH / OPTION_ASYNC_FLIP_SECONDARIES)
-> xf86ReturnOptValBool (OPTION_PAGEFLIP)
-> drmGetCap (DRM_CAP_PRIME)
-> drmSetClientCap (DRM_CLIENT_CAP_ATOMIC / DRM_CLIENT_CAP_UNIVERSAL_PLANES)
-> drmGetCap (DRM_CAP_ADDFB2_MODIFIERS)
-> drmmode_pre_init
-> drmGetCap (DRM_CAP_DUMB_BUFFER)
-> xf86CrtcConfigInit (register drmmode_xf86crtc_config_funcs)
-> drmModeGetResources
-> drmmode_output_init
-> xf86CrtcSetSizeRange
-> drmmode_crtc_init
-> drmmode_clones_init
-> xf86ProviderSetup
-> xf86InitialConfiguration
-> xf86SetGamma
-> xf86SetDpi
-> xf86LoadSubModule ("fb")
-> xf86InitViewport
-> AddScreen
-> init_screen
-> xf86ScreenInit
-> ScreenInit (hw/xfree86/drivers/modesetting/driver.c)
-> SetMaster
-> glamor_egl_get_gbm_device
-> drmmode_create_initial_bos
-> miSetVisualTypes
-> miSetPixmapDepths
-> fbScreenInit
-> fbSetupScreen
-> fbFinishScreenInit
-> fbPictureInit
-> miPictureInit
-> GetPictureScreen
-> drmmode_init
-> glamor_init
-> glamor_set_screen_private
-> glamor_egl_screen_init
-> gbm_device_get_backend_name
-> glamor_set_glvnd_vendor
-> glamor_enable_dri3
-> drmGetDeviceNameFromFd2
-> dri3_screen_init
-> glamor_make_current
-> epoxy_is_desktop_gl
-> epoxy_gl_version
-> epoxy_glsl_version
-> glamor_check_instruction_count
-> glamor_setup_debug_output
-> glamor_setup_formats
-> glamor_set_debug_level
-> glamor_font_init
-> glamor_composite_glyphs_init
-> glamor_init_vbo
-> glamor_init_gradient_shader
-> glamor_pixmap_init
-> glamor_sync_init
-> glamor_set_drawable_modifiers_func (get_drawable_modifiers)
-> xf86SetBlackWhitePixels
-> xf86SetBackingStore
-> xf86SetSilkenMouse
-> xf86GetPointerScreenFuncs
-> miDCInitialize
-> xf86_cursors_init
-> xf86CrtcScreenInit
-> xf86RandR12Init
-> RRScreenInit
-> xf86RandR12Init12
-> xf86RandR12CreateObjects12
-> xf86RandR12SetInfo12
-> xf86RandR12InitGamma
-> xf86RandR12SetRotations
-> xf86RandR12SetTransformSupport->
-> drmmode_setup_colormap
-> xf86DPMSInit
-> xf86XVScreenInit
-> XvScreenInit
-> xf86XVInitAdaptors
-> ms_vblank_screen_init
-> ms_dri2_screen_init
-> glamor_supports_pixmap_import_export
-> ms_dri2_register_frame_event_resource_types
-> DRI2ScreenInit
-> ms_present_screen_init
-> drmGetCap (DRM_CAP_ASYNC_PAGE_FLIP)
-> present_screen_init
-> present_screen_register_priv_keys
-> present_screen_priv_init
-> present_scmd_init_mode_hooks
-> present_fake_screen_init
-> update_desktop_dimensions
-> PictureSetSubpixelOrder
-> xf86EnsureRANDR
-> xf86RandRInit
-> RRScreenInit
-> RRInit
-> SetRRScreen
-> RRMonitorInit
-> dixSetPrivate (xf86RandRKey)
-> xf86AutoConfigOutputDevices
-> RRProviderAutoConfigGpuScreen
-> xf86RandR14ProviderSetOutputSource
-> RRInitPrimeSyncProps
-> RRSetChanged
-> xf86RandR14ProviderSetOffloadSink
-> xf86VGAarbiterWrapFunctions
-> xf86InitOrigins |