Add DPI stettings to SkDocument::CreatePDF(). Tests will be added in a future cl, once DPI will be …

include/core/SkDocument.h

Index: include/core/SkDocument.h
diff --git a/include/core/SkDocument.h b/include/core/SkDocument.h
index b941d1bd19ce775be0c83c474dcb42ba5e0f4dc9..a4bbad8d467b6f0028f55858cc8bd7b37e1a566a 100644
--- a/include/core/SkDocument.h
+++ b/include/core/SkDocument.h
@@ -16,6 +16,10 @@
 class SkCanvas;
 class SkWStream;
 
+/** SK_ScalarDefaultDPI is 72 DPI.
+*/
+#define SK_ScalarDefaultDPI           SkFloatToScalar(72.0f)
+
 /**
  *  High-level API for creating a document-based canvas. To use..
  *
@@ -37,7 +41,8 @@ public:
      *    as JPEG (DCT).

[reed1, 2013/10/21 13:10:24]

What does DPI mean to the client when they draw into this Document? Does it
affect the coordinates they should pass in? Does it affect internal
optimizations? Does it indicated something about the presumed target when the
Document gets "played" back?

[edisonn, 2013/10/21 14:40:58]

No
 Does it affect internal
it could, the images might be smaller or bigger, we might change the way we
encode the image (no ecoding, zip, jpeg), but I am not sure I should put this in
the comment, as the encoder controlls this
Does it indicated something about the presumed target when the
Not much, but if a ridiculous high DPI is used, the play back will be slow or
will fail because memory can't be allocated

added comment

      */
     static SkDocument* CreatePDF(const char filename[],
-                                 SkPicture::EncodeBitmap encoder = NULL);
+                                 SkPicture::EncodeBitmap encoder = NULL,
+                                 SkScalar dpi = SK_ScalarDefaultDPI);
 
     /**
      *  Create a PDF-backed document, writing the results into a stream.
@@ -52,7 +57,8 @@ public:
      *    as JPEG (DCT).
      */
     static SkDocument* CreatePDF(SkWStream*, void (*Done)(SkWStream*) = NULL,
-                                 SkPicture::EncodeBitmap encoder = NULL);
+                                 SkPicture::EncodeBitmap encoder = NULL,
+                                 SkScalar dpi = SK_ScalarDefaultDPI);
 
     /**
      *  Begin a new page for the document, returning the canvas that will draw