diff -r 51a74ef9ed63 -r ae94777fff8f Symbian3/SDK/Source/GUID-E56EB25C-9B94-5486-9492-5151FDF79B6C.dita --- a/Symbian3/SDK/Source/GUID-E56EB25C-9B94-5486-9492-5151FDF79B6C.dita Wed Mar 31 11:11:55 2010 +0100 +++ b/Symbian3/SDK/Source/GUID-E56EB25C-9B94-5486-9492-5151FDF79B6C.dita Fri Jun 11 12:39:03 2010 +0100 @@ -1,49 +1,49 @@ - - - - - -Global -Surface Updates -

Global surface updates are surface updates that are submitted to all displays -rather than just one display. By using global surface updates, the Video Renderer -can update surfaces on all displays including ones that it is not aware of. -When the Video Renderer sends a global surface update, the update is broadcast -by the Graphics Surface -Update component to all Composition Implementations present in the -system. Each Composition Implementation determines whether the surface is -displayed on its associated screen and if so, forces an update. For more information, -see Global Surface -Updates in the Graphics Guide.

-

The Video Renderer registers and unregisters surfaces with the Window Server -for all available displays. When the client calls CVideoRenderer::CreateSurfaceL(), -the Video Renderer creates the surface and then registers it with each display. -When the client calls CVideoRenderer::DestroySurfaceL(), -the Video Renderer unregisters the surface with each display and then destroys -it. The following sequence diagram shows how the Video Renderer registers -and unregisters surfaces:

- - Surface registration - - -

The Video Renderer uses the global constant KAllScreens (provided -by the Surface Update component) to ensure all displays are updated with new -data. The following sequence diagram shows the Video Renderer passing KAllScreens in -the call to RSurfaceUpdateSession::SubmitUpdate():

- - Data flow between client, Video Renderer and Surface Update -client-side API - - - -Video Renderer -Component -Graphics -Composition Collection + + + + + +Global +Surface Updates +

Global surface updates are surface updates that are submitted to all displays +rather than just one display. By using global surface updates, the Video Renderer +can update surfaces on all displays including ones that it is not aware of. +When the Video Renderer sends a global surface update, the update is broadcast +by the Graphics Surface +Update component to all Composition Implementations present in the +system. Each Composition Implementation determines whether the surface is +displayed on its associated screen and if so, forces an update. For more information, +see Global Surface +Updates in the Graphics Guide.

+

The Video Renderer registers and unregisters surfaces with the Window Server +for all available displays. When the client calls CVideoRenderer::CreateSurfaceL(), +the Video Renderer creates the surface and then registers it with each display. +When the client calls CVideoRenderer::DestroySurfaceL(), +the Video Renderer unregisters the surface with each display and then destroys +it. The following sequence diagram shows how the Video Renderer registers +and unregisters surfaces:

+ + Surface registration + + +

The Video Renderer uses the global constant KAllScreens (provided +by the Surface Update component) to ensure all displays are updated with new +data. The following sequence diagram shows the Video Renderer passing KAllScreens in +the call to RSurfaceUpdateSession::SubmitUpdate():

+ + Data flow between client, Video Renderer and Surface Update +client-side API + + + +Video Renderer +Component +Graphics +Composition Collection \ No newline at end of file