mirror of https://github.com/qpdf/qpdf.git
85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
// Copyright (c) 2005-2017 Jay Berkenbilt
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//
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// This file is part of qpdf.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Versions of qpdf prior to version 7 were released under the terms
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// of version 2.0 of the Artistic License. At your option, you may
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// continue to consider qpdf to be licensed under those terms. Please
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// see the manual for additional information.
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#ifndef __PL_DCT_HH__
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#define __PL_DCT_HH__
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#include <qpdf/Pipeline.hh>
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#include <qpdf/Pl_Buffer.hh>
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#include <jpeglib.h>
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class Pl_DCT: public Pipeline
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{
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public:
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// Constructor for decompressing image data
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QPDF_DLL
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Pl_DCT(char const* identifier, Pipeline* next);
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class CompressConfig
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{
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public:
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CompressConfig()
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{
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}
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virtual ~CompressConfig()
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{
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}
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virtual void apply(jpeg_compress_struct*) = 0;
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};
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// Constructor for compressing image data
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QPDF_DLL
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Pl_DCT(char const* identifier, Pipeline* next,
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JDIMENSION image_width,
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JDIMENSION image_height,
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int components,
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J_COLOR_SPACE color_space,
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CompressConfig* config_callback = 0);
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QPDF_DLL
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virtual ~Pl_DCT();
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QPDF_DLL
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virtual void write(unsigned char* data, size_t len);
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QPDF_DLL
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virtual void finish();
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private:
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void compress(void* cinfo, Buffer*);
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void decompress(void* cinfo, Buffer*);
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enum action_e { a_compress, a_decompress };
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action_e action;
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Pl_Buffer buf;
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// Used for compression
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JDIMENSION image_width;
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JDIMENSION image_height;
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int components;
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J_COLOR_SPACE color_space;
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CompressConfig* config_callback;
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};
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#endif // __PL_DCT_HH__
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