* complete overhaul of the font/glyph caching

* the previous AGG implementation is superfluous
* the new implementation is based on that one, but in a way that allows
  read/write locking to the list of cache entries (fonts) as well as
  read/write locking to the cached glyphs per individual font cache entry
* new GlyphLayoutEngine.h, which is to be the central place for layouting
  glyphs along the baseline.
  It handles the locking for getting the font cache entries.
  It works by giving it a template class GlyphConsumer which does the
  actual work.
* changed AGGTextRenderer to use the new font cache
* changed ServerFont::StringWidth(), and the bounding box stuff to use it
* changed DrawingEngine, it doesn't need the global font lock anymore
* our BFont thought that GetBoundingBoxesAsGlyphs and GetBoundingBoxesAsString
  is the same, which of course it isn't, hence the two separate functions...
  AsGlyphs just gets the bounding box of each glyph in a string, not treating
  the string as an actual word
  AsString adds the offset of the glyph in the word to the bounding box
* changed ServerProtocol.h accordingly for the different bounding box meaning


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21797 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/ServerFont.h

@@ -1,11 +1,12 @@
 /*
- * Copyright 2001-2005, Haiku.
+ * Copyright 2001-2007, Haiku.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
  *		DarkWyrm <[email protected]>
  *		Jérôme Duval, [email protected]
  *		Axel Dörfler, [email protected]
+ *		Stephan Aßmus <[email protected]>
  */
 #ifndef SERVER_FONT_H
 #define SERVER_FONT_H
@@ -15,6 +16,7 @@
 #include <Rect.h>
 
 #include "FontFamily.h"
+#include "Transformable.h"
 
 class BShape;
 class BString;
@@ -135,11 +137,12 @@ class ServerFont {
 									int32 numChars, escapement_delta delta,
 									float widthArray[]) const;
 
-			status_t			GetBoundingBoxesAsString(const char charArray[],
+			status_t			GetBoundingBoxes(const char charArray[],
 									int32 numChars, BRect rectArray[],
 									bool stringEscapement,
 									font_metric_mode mode,
-									escapement_delta delta);
+									escapement_delta delta,
+									bool asString);
 
 			status_t			GetBoundingBoxesForStrings(char *charArray[],
 									int32 lengthArray[], int32 numStrings,
@@ -147,7 +150,8 @@ class ServerFont {
 									escapement_delta deltaArray[]);
 
 			float				StringWidth(const char *string,
-									int32 numChars) const;
+									int32 numChars,
+									const escapement_delta* delta = NULL) const;
 
 			bool				Lock() const { return fStyle->Lock(); }
 			void				Unlock() const { fStyle->Unlock(); }
@@ -162,6 +166,8 @@ class ServerFont {
 											   uint32 mode,
 											   float width) const;
 
+			Transformable		EmbeddedTransformation() const;
+
 protected:
 	friend class FontStyle;