XPS, DM: add SkDocument::CreateXPS

include/core/SkDocument.h

Index: include/core/SkDocument.h
diff --git a/include/core/SkDocument.h b/include/core/SkDocument.h
index db8113f0e2501b53281ec1951e1239e47d76a793..9adb48fe7132b65715b0e4b98f78f24bae4aa0b0 100644
--- a/include/core/SkDocument.h
+++ b/include/core/SkDocument.h
@@ -63,6 +63,20 @@ public:
     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