diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/include/core/SkDocument.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/include/core/SkDocument.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,140 @@
+/*
+ * 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
+
+#include "SkBitmap.h"
+#include "SkPicture.h"
+#include "SkRect.h"
+#include "SkRefCnt.h"
+
+class SkCanvas;
+class SkWStream;
+
+/** SK_ScalarDefaultDPI is 72 DPI.
+*/
+#define SK_ScalarDefaultRasterDPI           72.0f
+
+/**
+ *  High-level API for creating a document-based canvas. To use..
+ *
+ *  1. Create a document, specifying a stream to store the output.
+ *  2. For each "page" of content:
+ *      a. canvas = doc->beginPage(...)
+ *      b. draw_my_content(canvas);
+ *      c. doc->endPage();
+ *  3. Close the document with doc->close().
+ */
+class SkDocument : public SkRefCnt {
+public:
+    SK_DECLARE_INST_COUNT(SkDocument)
+
+    /**
+     *  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).
+     *  rasterDpi - the DPI at which features without native PDF support
+     *              will be rasterized (e.g. draw image with perspective,
+     *              draw text with perspective, ...)
+     *              A larger DPI would create a PDF that reflects the original
+     *              intent with better fidelity, but it can make for larger
+     *              PDF files too, which would use more memory while rendering,
+     *              and it would be slower to be processed or sent online or
+     *              to printer.
+     */
+    static SkDocument* CreatePDF(
+            const char filename[],
+            SkPicture::EncodeBitmap encoder = NULL,
+            SkScalar rasterDpi = SK_ScalarDefaultRasterDPI);
+
+    /**
+     *  Create a PDF-backed document, writing the results into a stream.
+     *  If there is an error trying to create the doc, returns NULL.
+     *
+     *  The document may write to the stream at anytime during its lifetime,
+     *  until either close() is called or the document is deleted. Once close()
+     *  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).
+     *  Done - clean up method intended to allow deletion of the stream.
+     *         Its aborted parameter is true if the cleanup is due to an abort
+     *         call. It is false otherwise.
+     *  rasterDpi - the DPI at which features without native PDF support
+     *              will be rasterized (e.g. draw image with perspective,
+     *              draw text with perspective, ...)
+     *              A larger DPI would create a PDF that reflects the original
+     *              intent with better fidelity, but it can make for larger
+     *              PDF files too, which would use more memory while rendering,
+     *              and it would be slower to be processed or sent online or
+     *              to printer.     */
+    static SkDocument* CreatePDF(
+            SkWStream*, void (*Done)(SkWStream*,bool aborted) = NULL,
+            SkPicture::EncodeBitmap encoder = NULL,
+            SkScalar rasterDpi = SK_ScalarDefaultRasterDPI);
+
+    /**
+     *  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
+     *  (into the canvas returned by beginPage()). After this call the canvas
+     *  returned by beginPage() will be out-of-scope.
+     */
+    void endPage();
+
+    /**
+     *  Call close() when all pages have been drawn. This will close the file
+     *  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 abort();
+
+protected:
+    SkDocument(SkWStream*, void (*)(SkWStream*, bool aborted));
+    // note: subclasses must call close() in their destructor, as the base class
+    // cannot do this for them.
+    virtual ~SkDocument();
+
+    virtual SkCanvas* onBeginPage(SkScalar width, SkScalar height,
+                                  const SkRect& content) = 0;
+    virtual void onEndPage() = 0;
+    virtual bool onClose(SkWStream*) = 0;
+    virtual void onAbort() = 0;
+
+    enum State {
+        kBetweenPages_State,
+        kInPage_State,
+        kClosed_State
+    };
+    State getState() const { return fState; }
+
+private:
+    SkWStream* fStream;
+    void       (*fDoneProc)(SkWStream*, bool aborted);
+    State      fState;
+
+    typedef SkRefCnt INHERITED;
+};
+
+#endif