Stephan Aßmus 38287e02af * completed my changes to DrawState handling, the current DrawingState
of the active ViewLayer is now always mirrored in the Painter instance
  of a ServerWindow, so that it doesn't need to be synced on every drawing
  command, this was previously incomplete for font handling
* removed the DrawState parameter from all the DrawingEngine functions
* adjusted ServerWindow and ServerPicture accordingly
* made sure that string related functions used by non-drawing related
  parts (ServerApp, Decorator) don't interfere with the current drawing
  state
* moved AS_SYNC handling from _DispatchViewMessage to _DispatchMessage,
  it is actually a window message and doesn't require fCurrentLayer to
  be valid
* fixed bug #1300, fCurrentLayer was not updated when a ViewLayer was
  deleted by client request which happened to be fCurrentLayer (I am now
  handling it so that the parent becomes the current layer, could be
  wrong)
* AGGTextRenderer is no longer using it's own scanline, which should save
  a few bytes RAM, the Painter already had such an object
* StringWidth() in AGGTextRenderer is now taking the escapement_delta into
  account
* Painter::StrokeLine() doesn't need to check the clipping as much, since
  that is already done in DrawingEngine
* if a ServerWindow message is not handled because fCurrentLayer is NULL,
  a reply is sent in case the messages needs it (client window could
  freeze otherwise, waiting for the reply for ever)
* removed unused AS_SET_FONT and AS_SET_FONT_SIZE
* added automatic RGBColor -> rgb_color conversion to RGBColor.h
* minor cleanup for 80 char/line limit



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21685 a95241bf-73f2-0310-859d-f6bbb57e9c96
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