008c498b58
This reverts r3453 TBR=epoger@google.com Review URL: https://codereview.appspot.com/5869048 git-svn-id: http://skia.googlecode.com/svn/trunk@3454 2bbb7eff-a529-9590-31e7-b0007b416f81
101 lines
3.9 KiB
C++
101 lines
3.9 KiB
C++
|
|
/*
|
|
* 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 {
|
|
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(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. This function adds the page content
|
|
* to the passed catalog, so it must be called for each document
|
|
* that the page is part of.
|
|
* @param catalog The catalog to add page content objects to.
|
|
* @param firstPage Indicate if this is the first page of a document.
|
|
* @param resourceObjects All the resource objects (recursively) used on
|
|
* the page are added to this array. This gives
|
|
* the caller a chance to deduplicate resources
|
|
* across pages.
|
|
*/
|
|
void finalizePage(SkPDFCatalog* catalog, bool firstPage,
|
|
SkTDArray<SkPDFObject*>* resourceObjects);
|
|
|
|
/** Determine the size of the page content and store to the catalog
|
|
* the offsets of all nonresource-indirect objects that make up the page
|
|
* content. This must be called before emitPage(), but after finalizePage.
|
|
* @param catalog The catalog to add the object offsets to.
|
|
* @param fileOffset The file offset where the page content will be
|
|
* emitted.
|
|
*/
|
|
off_t getPageSize(SkPDFCatalog* catalog, off_t fileOffset);
|
|
|
|
/** Output the page content to the passed stream.
|
|
* @param stream The writable output stream to send the content to.
|
|
* @param catalog The active object catalog.
|
|
*/
|
|
void emitPage(SkWStream* stream, SkPDFCatalog* catalog);
|
|
|
|
/** 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 catalog The catalog to add new objects into.
|
|
* @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,
|
|
SkPDFCatalog* catalog,
|
|
SkTDArray<SkPDFDict*>* pageTree,
|
|
SkPDFDict** rootNode);
|
|
|
|
/** Get the fonts used on this page.
|
|
*/
|
|
SK_API const SkTDArray<SkPDFFont*>& getFontResources() const;
|
|
|
|
/** Returns a SkPDFGlyphSetMap which represents glyph usage of every font
|
|
* that shows on this page.
|
|
*/
|
|
const SkPDFGlyphSetMap& getFontGlyphUsage() const;
|
|
|
|
private:
|
|
// Multiple pages may reference the content.
|
|
SkRefPtr<SkPDFDevice> fDevice;
|
|
|
|
// Once the content is finalized, put it into a stream for output.
|
|
SkRefPtr<SkPDFStream> fContentStream;
|
|
};
|
|
|
|
#endif
|