Update the SkDocument interface to allow for 1) abort won't emit pdf, 2) close can report success/f…

include/core/SkDocument.h

Index: include/core/SkDocument.h
diff --git a/include/core/SkDocument.h b/include/core/SkDocument.h
index bbed64a80691fb3fde1358904ec02ba5b5bb8d3b..f8e805dbd8ec7b013adb617d702a45178c7e0992 100644
--- a/include/core/SkDocument.h
+++ b/include/core/SkDocument.h
@@ -10,6 +10,9 @@
 
 #include "SkRect.h"
 #include "SkRefCnt.h"
+#include "SkBitmap.h"
+#include "SkPicture.h"
+#include "SkRect.h"
 
 class SkCanvas;
 class SkWStream;
@@ -31,8 +34,11 @@ public:
     /**
      *  Create a PDF-backed document, writing the results into a file.
      *  If there is an error trying to create the doc, returns NULL.
+     *  encoder sets the DCTEncoder for images, to encode a bitmap
+     *    as JPEG (DCT).
      */
-    static SkDocument* CreatePDF(const char filename[]);
+    static SkDocument* CreatePDF(const char filename[],
+                                 SkPicture::EncodeBitmap encoder = NULL);
 
     /**
      *  Create a PDF-backed document, writing the results into a stream.
@@ -43,16 +49,24 @@ public:
      *  has been called, and all of the data has been written to the stream,
      *  if there is a Done proc provided, it will be called with the stream.
      *  The proc can delete the stream, or whatever it needs to do.
+     *  encoder sets the DCTEncoder for images, to encode a bitmap
+     *    as JPEG (DCT).
      */
-    static SkDocument* CreatePDF(SkWStream*, void (*Done)(SkWStream*) = NULL);
+    static SkDocument* CreatePDF(SkWStream*, void (*Done)(SkWStream*) = NULL,
+                                 SkPicture::EncodeBitmap encoder = NULL);
 
     /**
      *  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.
+     *  @param trimSize The content size of the page in points.
+     *         Everything outside of trimBox is considered non essential,
+     *         for example margins are outside of trim box.
+     *  @param mediaBox The Page size in points. If mediaBox is null, then we
+     *         set the mediaBox to the trim rectangle.
      */
-    SkCanvas* beginPage(SkScalar width, SkScalar height,
-                        const SkRect* content = NULL);
+    SkCanvas* beginPage(const SkSize& trimSize,
+                        const SkRect* mediaBox = NULL);
 
     /**
      *  Call endPage() when the content for the current page has been drawn
@@ -66,8 +80,15 @@ public:
      *  or stream holding the document's contents. After close() the document
      *  can no longer add new pages. Deleting the document will automatically
      *  call close() if need be.
+     *  Returns true on success or false on failure.
+     */
+    bool close();
+
+    /**
+     *  Call abort() to stop producing the document immediately.
+     *  The stream output must be ignored, and should not be trusted.
      */
-    void close();
+    void abort();
 
 protected:
     SkDocument(SkWStream*, void (*)(SkWStream*));
@@ -75,10 +96,11 @@ protected:
     // cannot do this for them.
     virtual ~SkDocument();
 
-    virtual SkCanvas* onBeginPage(SkScalar width, SkScalar height,
-                                  const SkRect& content) = 0;
+    virtual SkCanvas* onBeginPage(const SkSize& trimSize,
+                                  const SkRect* mediaBox) = 0;
     virtual void onEndPage() = 0;
-    virtual void onClose(SkWStream*) = 0;
+    virtual bool onClose(SkWStream*) = 0;
+    virtual void onAbort() = 0;
 
     enum State {
         kBetweenPages_State,