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79f6b4823b
Have classes contain only a single private member of type PointerHolder<Members>. This makes it safe to change the structure of the Members class without breaking binary compatibility. Many of the classes already follow this pattern quite successfully. This brings in the rest of the class that are part of the public API.
105 lines
2.7 KiB
C++
105 lines
2.7 KiB
C++
// Copyright (c) 2005-2019 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 QPDF_DLL_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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class Members
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{
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friend class Pl_DCT;
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public:
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QPDF_DLL
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~Members();
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private:
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Members(action_e action,
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char const* buf_description,
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JDIMENSION image_width = 0,
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JDIMENSION image_height = 0,
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int components = 1,
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J_COLOR_SPACE color_space = JCS_GRAYSCALE,
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CompressConfig* config_callback = 0);
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Members(Members const&);
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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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PointerHolder<Members> m;
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};
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#endif // PL_DCT_HH
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