mirror of
https://github.com/qpdf/qpdf.git
synced 2024-05-29 16:30:53 +00:00
cb769c62e5
This comment expands all tabs using an 8-character tab-width. You should ignore this commit when using git blame or use git blame -w. In the early days, I used to use tabs where possible for indentation, since emacs did this automatically. In recent years, I have switched to only using spaces, which means qpdf source code has been a mixture of spaces and tabs. I have avoided cleaning this up because of not wanting gratuitous whitespaces change to cloud the output of git blame, but I changed my mind after discussing with users who view qpdf source code in editors/IDEs that have other tab widths by default and in light of the fact that I am planning to start applying automatic code formatting soon.
89 lines
2.6 KiB
C++
89 lines
2.6 KiB
C++
// Copyright (c) 2005-2022 Jay Berkenbilt
|
|
//
|
|
// This file is part of qpdf.
|
|
//
|
|
// 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.
|
|
//
|
|
// Versions of qpdf prior to version 7 were released under the terms
|
|
// of version 2.0 of the Artistic License. At your option, you may
|
|
// continue to consider qpdf to be licensed under those terms. Please
|
|
// see the manual for additional information.
|
|
|
|
#ifndef PL_FLATE_HH
|
|
#define PL_FLATE_HH
|
|
|
|
#include <qpdf/Pipeline.hh>
|
|
#include <functional>
|
|
#include <memory>
|
|
|
|
class Pl_Flate: public Pipeline
|
|
{
|
|
public:
|
|
static unsigned int const def_bufsize = 65536;
|
|
static int compression_level;
|
|
|
|
enum action_e { a_inflate, a_deflate };
|
|
|
|
QPDF_DLL
|
|
Pl_Flate(char const* identifier, Pipeline* next,
|
|
action_e action, unsigned int out_bufsize = def_bufsize);
|
|
QPDF_DLL
|
|
virtual ~Pl_Flate();
|
|
|
|
QPDF_DLL
|
|
virtual void write(unsigned char* data, size_t len);
|
|
QPDF_DLL
|
|
virtual void finish();
|
|
|
|
// Globally set compression level from 1 (fastest, least
|
|
// compression) to 9 (slowest, most compression). Use -1 to set
|
|
// the default compression level. This is passed directly to zlib.
|
|
// This method returns a pointer to the current Pl_Flate object so
|
|
// you can create a pipeline with
|
|
// Pl_Flate(...)->setCompressionLevel(...)
|
|
QPDF_DLL
|
|
static void setCompressionLevel(int);
|
|
|
|
QPDF_DLL
|
|
void setWarnCallback(std::function<void(char const*, int)> callback);
|
|
|
|
private:
|
|
void handleData(unsigned char* data, size_t len, int flush);
|
|
void checkError(char const* prefix, int error_code);
|
|
void warn(char const*, int error_code);
|
|
|
|
class Members
|
|
{
|
|
friend class Pl_Flate;
|
|
|
|
public:
|
|
QPDF_DLL
|
|
~Members();
|
|
|
|
private:
|
|
Members(size_t out_bufsize, action_e action);
|
|
Members(Members const&);
|
|
|
|
std::shared_ptr<unsigned char> outbuf;
|
|
size_t out_bufsize;
|
|
action_e action;
|
|
bool initialized;
|
|
void* zdata;
|
|
std::function<void(char const*, int)> callback;
|
|
};
|
|
|
|
PointerHolder<Members> m;
|
|
};
|
|
|
|
#endif // PL_FLATE_HH
|