dfc5ffe478
Review URL: http://codereview.appspot.com/4324042 git-svn-id: http://skia.googlecode.com/svn/trunk@1022 2bbb7eff-a529-9590-31e7-b0007b416f81
103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
/*
|
|
* Copyright (C) 2010 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef SkPDFCatalog_DEFINED
|
|
#define SkPDFCatalog_DEFINED
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include "SkPDFTypes.h"
|
|
#include "SkRefCnt.h"
|
|
#include "SkTDArray.h"
|
|
|
|
/** \class SkPDFCatalog
|
|
|
|
The PDF catalog manages object numbers and file offsets. It is used
|
|
to create the PDF cross reference table.
|
|
*/
|
|
class SK_API SkPDFCatalog {
|
|
public:
|
|
/** Create a PDF catalog.
|
|
*/
|
|
SkPDFCatalog();
|
|
~SkPDFCatalog();
|
|
|
|
/** Add the passed object to the catalog. Refs obj.
|
|
* @param obj The object to add.
|
|
* @param onFirstPage Is the object on the first page.
|
|
* @return The obj argument is returned.
|
|
*/
|
|
SkPDFObject* addObject(SkPDFObject* obj, bool onFirstPage);
|
|
|
|
/** Inform the catalog of the object's position in the final stream.
|
|
* The object should already have been added to the catalog. Returns
|
|
* the object's size.
|
|
* @param obj The object to add.
|
|
* @param offset The byte offset in the output stream of this object.
|
|
*/
|
|
size_t setFileOffset(SkPDFObject* obj, size_t offset);
|
|
|
|
/** Output the object number for the passed object.
|
|
* @param obj The object of interest.
|
|
* @param stream The writable output stream to send the output to.
|
|
*/
|
|
void emitObjectNumber(SkWStream* stream, SkPDFObject* obj);
|
|
|
|
/** Return the number of bytes that would be emitted for the passed
|
|
* object's object number.
|
|
* @param obj The object of interest
|
|
*/
|
|
size_t getObjectNumberSize(SkPDFObject* obj);
|
|
|
|
/** Output the cross reference table for objects in the catalog.
|
|
* Returns the total number of objects.
|
|
* @param stream The writable output stream to send the output to.
|
|
* @param firstPage If true, include first page objects only, otherwise
|
|
* include all objects not on the first page.
|
|
*/
|
|
int32_t emitXrefTable(SkWStream* stream, bool firstPage);
|
|
|
|
private:
|
|
struct Rec {
|
|
Rec(SkPDFObject* object, bool onFirstPage)
|
|
: fObject(object),
|
|
fFileOffset(0),
|
|
fObjNumAssigned(false),
|
|
fOnFirstPage(onFirstPage) {
|
|
}
|
|
SkPDFObject* fObject;
|
|
off_t fFileOffset;
|
|
bool fObjNumAssigned;
|
|
bool fOnFirstPage;
|
|
};
|
|
|
|
// TODO(vandebo) Make this a hash if it's a performance problem.
|
|
SkTDArray<struct Rec> fCatalog;
|
|
|
|
// Number of objects on the first page.
|
|
uint32_t fFirstPageCount;
|
|
// Next object number to assign (on page > 1).
|
|
uint32_t fNextObjNum;
|
|
// Next object number to assign on the first page.
|
|
uint32_t fNextFirstPageObjNum;
|
|
|
|
int findObjectIndex(SkPDFObject* obj) const;
|
|
|
|
int assignObjNum(SkPDFObject* obj);
|
|
};
|
|
|
|
#endif
|