1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// Copyright (c) 2005-2017 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_DCT_HH__
#define __PL_DCT_HH__
#include <qpdf/Pipeline.hh>
#include <qpdf/Pl_Buffer.hh>
#include <jpeglib.h>
class Pl_DCT: public Pipeline
{
public:
// Constructor for decompressing image data
QPDF_DLL
Pl_DCT(char const* identifier, Pipeline* next);
class CompressConfig
{
public:
CompressConfig()
{
}
virtual ~CompressConfig()
{
}
virtual void apply(jpeg_compress_struct*) = 0;
};
// Constructor for compressing image data
QPDF_DLL
Pl_DCT(char const* identifier, Pipeline* next,
JDIMENSION image_width,
JDIMENSION image_height,
int components,
J_COLOR_SPACE color_space,
CompressConfig* config_callback = 0);
QPDF_DLL
virtual ~Pl_DCT();
QPDF_DLL
virtual void write(unsigned char* data, size_t len);
QPDF_DLL
virtual void finish();
private:
void compress(void* cinfo, Buffer*);
void decompress(void* cinfo, Buffer*);
enum action_e { a_compress, a_decompress };
action_e action;
Pl_Buffer buf;
// Used for compression
JDIMENSION image_width;
JDIMENSION image_height;
int components;
J_COLOR_SPACE color_space;
CompressConfig* config_callback;
};
#endif // __PL_DCT_HH__
|
