* Prepared the BScreen and BPrivateScreen class to be used with multiple monitors.

* BPrivateScreen now buffers its frame for 0.1 seconds (so that calling it several
  times in a row is both consistent and cheap).
* Added GetFrameBufferConfig() call to the HW interface (and implemented it).
* Added server commands AS_VALID_SCREEN_ID, AS_GET_NEXT_SCREEN_ID, and
  AS_GET_FRAME_BUFFER_CONFIG.
* BPrivateScreen::BaseAddress() and BPrivateScreen::BytesPerRow() are now working.
* minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14915 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/app/ServerProtocol.h

@@ -139,6 +139,8 @@ enum {
 	AS_GET_TRUNCATED_STRINGS,
 
 	// Screen methods
+	AS_VALID_SCREEN_ID,
+	AS_GET_NEXT_SCREEN_ID,
 	AS_SCREEN_GET_MODE,
 	AS_SCREEN_SET_MODE,
 	AS_PROPOSE_MODE,
@@ -156,6 +158,7 @@ enum {
 
 	AS_GET_RETRACE_SEMAPHORE,
 	AS_GET_ACCELERANT_INFO,
+	AS_GET_FRAME_BUFFER_CONFIG,
 	
 	AS_SET_DPMS,
 	AS_GET_DPMS_STATE,