XPS, DM: add SkDocument::CreateXPS

include/core/SkDocument.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkDocument_DEFINED
 #define SkDocument_DEFINED
 
@@ skipping 45 matching lines @@
      */
     static SkDocument* CreatePDF(SkWStream*,
                                  SkScalar dpi = SK_ScalarDefaultRasterDPI);
 
     /**
      *  Create a PDF-backed document, writing the results into a file.
      */
     static SkDocument* CreatePDF(const char outputFilePath[],
                                  SkScalar dpi = SK_ScalarDefaultRasterDPI);
 
+#ifdef SK_SUPPORT_XPS

[reed1, 2015/03/02 21:32:27]

Why does this check need to be here? Can it not just be on the impl, and we
return NULL on platforms that don't have XPS?

[reed1, 2015/03/02 21:41:32]

As a factory, it is allowed to return NULL even on a windows machine, so I think
the caller always needs to check.

[hal.canary, 2015/03/02 23:08:24]

Done.

+    /**
+     *  Create a XPS-backed document, writing the results into the stream.
+     */
+    static SkDocument* CreateXPS(SkWStream* stream,
+                                 SkScalar dpi = SK_ScalarDefaultRasterDPI);
+
+    /**
+     *  Create a XPS-backed document, writing the results into a file.
+     */
+    static SkDocument* CreateXPS(const char path[],
+                                 SkScalar dpi = SK_ScalarDefaultRasterDPI);
+#endif  // SK_SUPPORT_XPS
+
     /**
      *  Begin a new page for the document, returning the canvas that will draw
      *  into the page. The document owns this canvas, and it will go out of
      *  scope when endPage() or close() is called, or the document is deleted.
      */
     SkCanvas* beginPage(SkScalar width, SkScalar height,
                         const SkRect* content = NULL);
 
     /**
      *  Call endPage() when the content for the current page has been drawn
@@ skipping 42 matching lines @@
 
 private:
     SkWStream* fStream;
     void       (*fDoneProc)(SkWStream*, bool aborted);
     State      fState;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif