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/*
* Copyright 2010 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkPDFPage_DEFINED
#define SkPDFPage_DEFINED
#include "SkPDFTypes.h"
#include "SkPDFStream.h"
#include "SkRefCnt.h"
#include "SkTDArray.h"
class SkPDFCatalog;
class SkPDFDevice;
class SkWStream;
/** \class SkPDFPage
A SkPDFPage contains meta information about a page, is used in the page
tree and points to the content of the page.
*/
class SkPDFPage : public SkPDFDict {
SK_DECLARE_INST_COUNT(SkPDFPage)
public:
/** Create a PDF page with the passed PDF device. The device need not
* have content on it yet.
* @param content The page content.
*/
explicit SkPDFPage(const SkPDFDevice* content);
~SkPDFPage();
/** Before a page and its contents can be sized and emitted, it must
* be finalized. No changes to the PDFDevice will be honored after
* finalizePage has been called.
*/
void finalizePage();
/** Add destinations for this page to the supplied dictionary.
* @param dict Dictionary to add destinations to.
*/
void appendDestinations(SkPDFDict* dict);
/** Generate a page tree for the passed vector of pages. New objects are
* added to the catalog. The pageTree vector is populated with all of
* the 'Pages' dictionaries as well as the 'Page' objects. Page trees
* have both parent and children links, creating reference cycles, so
* it must be torn down explicitly. The first page is not added to
* the pageTree dictionary array so the caller can handle it specially.
* @param pages The ordered vector of page objects.
* @param pageTree An output vector with all of the internal and leaf
* nodes of the pageTree.
* @param rootNode An output parameter set to the root node.
*/
static void GeneratePageTree(const SkTDArray<SkPDFPage*>& pages,
SkTDArray<SkPDFDict*>* pageTree,
SkPDFDict** rootNode);
/** Get the fonts used on this page.
*/
const SkTDArray<SkPDFFont*>& getFontResources() const;
/** Returns a SkPDFGlyphSetMap which represents glyph usage of every font
* that shows on this page.
*/
const SkPDFGlyphSetMap& getFontGlyphUsage() const;
SkPDFObject* getContentStream() const;
private:
// Multiple pages may reference the content.
SkAutoTUnref<const SkPDFDevice> fDevice;
// Once the content is finalized, put it into a stream for output.
SkAutoTUnref<SkPDFStream> fContentStream;
typedef SkPDFDict INHERITED;
};
#endif
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