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242 lines
8.9 KiB
C++
242 lines
8.9 KiB
C++
/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of the copyright holders may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#ifndef _GRFMT_PNG_H_
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#define _GRFMT_PNG_H_
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#ifdef HAVE_PNG
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#include "grfmt_base.hpp"
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#include "bitstrm.hpp"
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#include <png.h>
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#include <zlib.h>
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#include <vector>
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namespace cv
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{
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struct Chunk { std::vector<unsigned char> p; };
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struct OP { unsigned char* p; uint32_t size; int x, y, w, h, valid, filters; };
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typedef struct {
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unsigned char r, g, b;
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} rgb;
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class APNGFrame {
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public:
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APNGFrame();
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// Destructor
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~APNGFrame();
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bool setMat(const cv::Mat& src, unsigned delayNum = 1, unsigned delayDen = 1000);
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// Getters and Setters
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unsigned char* getPixels() const { return _pixels; }
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void setPixels(unsigned char* pixels);
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unsigned int getWidth() const { return _width; }
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void setWidth(unsigned int width);
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unsigned int getHeight() const { return _height; }
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void setHeight(unsigned int height);
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unsigned char getColorType() const { return _colorType; }
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void setColorType(unsigned char colorType);
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rgb* getPalette() { return _palette; }
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void setPalette(const rgb* palette);
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unsigned char* getTransparency() { return _transparency; }
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void setTransparency(const unsigned char* transparency);
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int getPaletteSize() const { return _paletteSize; }
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void setPaletteSize(int paletteSize);
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int getTransparencySize() const { return _transparencySize; }
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void setTransparencySize(int transparencySize);
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unsigned int getDelayNum() const { return _delayNum; }
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void setDelayNum(unsigned int delayNum);
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unsigned int getDelayDen() const { return _delayDen; }
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void setDelayDen(unsigned int delayDen);
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std::vector<png_bytep>& getRows() { return _rows; }
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private:
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unsigned char* _pixels;
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unsigned int _width;
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unsigned int _height;
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unsigned char _colorType;
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rgb _palette[256];
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unsigned char _transparency[256];
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int _paletteSize;
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int _transparencySize;
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unsigned int _delayNum;
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unsigned int _delayDen;
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std::vector<png_bytep> _rows;
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};
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class PngDecoder CV_FINAL : public BaseImageDecoder
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{
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public:
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PngDecoder();
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virtual ~PngDecoder();
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bool readData( Mat& img ) CV_OVERRIDE;
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bool readHeader() CV_OVERRIDE;
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bool nextPage() CV_OVERRIDE;
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ImageDecoder newDecoder() const CV_OVERRIDE;
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private:
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static void readDataFromBuf(void* png_ptr, uchar* dst, size_t size);
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static void info_fn(png_structp png_ptr, png_infop info_ptr);
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static void row_fn(png_structp png_ptr, png_bytep new_row, png_uint_32 row_num, int pass);
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CV_NODISCARD_STD bool processing_start(void* frame_ptr, const Mat& img);
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CV_NODISCARD_STD bool processing_finish();
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void compose_frame(std::vector<png_bytep>& rows_dst, const std::vector<png_bytep>& rows_src, unsigned char bop, uint32_t x, uint32_t y, uint32_t w, uint32_t h, Mat& img);
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/**
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* @brief Reads data from an I/O source into the provided buffer.
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* @param buffer Pointer to the buffer where the data will be stored.
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* @param num_bytes Number of bytes to read into the buffer.
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* @return true if the operation is successful, false otherwise.
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*/
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CV_NODISCARD_STD bool readFromStreamOrBuffer(void* buffer, size_t num_bytes);
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uint32_t read_chunk(Chunk& chunk);
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CV_NODISCARD_STD bool InitPngPtr();
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void ClearPngPtr();
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png_structp m_png_ptr = nullptr; // pointer to decompression structure
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png_infop m_info_ptr = nullptr; // pointer to image information structure
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png_infop m_end_info = nullptr; // pointer to one more image information structure
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int m_bit_depth;
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FILE* m_f;
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int m_color_type;
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Chunk m_chunkIHDR;
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int m_frame_no;
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size_t m_buf_pos;
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std::vector<Chunk> m_chunksInfo;
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APNGFrame frameRaw;
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APNGFrame frameNext;
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APNGFrame frameCur;
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Mat m_mat_raw;
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Mat m_mat_next;
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uint32_t w0;
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uint32_t h0;
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uint32_t x0;
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uint32_t y0;
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uint32_t delay_num;
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uint32_t delay_den;
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uint32_t dop;
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uint32_t bop;
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bool m_is_fcTL_loaded;
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bool m_is_IDAT_loaded;
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};
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class PngEncoder CV_FINAL : public BaseImageEncoder
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{
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public:
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PngEncoder();
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virtual ~PngEncoder();
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bool isFormatSupported( int depth ) const CV_OVERRIDE;
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bool write( const Mat& img, const std::vector<int>& params ) CV_OVERRIDE;
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bool writeanimation(const Animation& animinfo, const std::vector<int>& params) CV_OVERRIDE;
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ImageEncoder newEncoder() const CV_OVERRIDE;
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protected:
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static void writeDataToBuf(void* png_ptr, unsigned char* src, size_t size);
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static void flushBuf(void* png_ptr);
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/**
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* @brief Writes data to an output destination, either a file stream or an in-memory buffer.
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*
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* This function handles two output scenarios:
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* 1. If a file stream is provided, the data is written to the stream using `fwrite`.
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* 2. If `stream` is null, the data is written to an in-memory buffer (`m_buf`), which is resized as needed.
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*
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* @param buffer Pointer to the data to be written.
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* @param num_bytes The number of bytes to be written.
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* @param stream Pointer to the file stream for writing. If null, the data is written to the in-memory buffer.
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* @return The number of bytes successfully written.
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* - For file-based writes, this is the number of bytes written to the stream.
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* - For buffer-based writes, this is the total number of bytes added to the buffer.
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*
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* @throws std::runtime_error If the in-memory buffer (`m_buf`) exceeds its maximum capacity.
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* @note If `num_bytes` is 0 or `buffer` is null, the function returns 0.
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*/
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size_t writeToStreamOrBuffer(void const* buffer, size_t num_bytes, FILE* stream);
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private:
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void writeChunk(FILE* f, const char* name, unsigned char* data, uint32_t length);
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void writeIDATs(FILE* f, int frame, unsigned char* data, uint32_t length, uint32_t idat_size);
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void processRect(unsigned char* row, int rowbytes, int bpp, int stride, int h, unsigned char* rows);
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void deflateRectFin(unsigned char* zbuf, uint32_t* zsize, int bpp, int stride, unsigned char* rows, int zbuf_size, int n);
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void deflateRectOp(unsigned char* pdata, int x, int y, int w, int h, int bpp, int stride, int zbuf_size, int n);
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bool getRect(uint32_t w, uint32_t h, unsigned char* pimage1, unsigned char* pimage2, unsigned char* ptemp, uint32_t bpp, uint32_t stride, int zbuf_size, uint32_t has_tcolor, uint32_t tcolor, int n);
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AutoBuffer<unsigned char> op_zbuf1;
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AutoBuffer<unsigned char> op_zbuf2;
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AutoBuffer<unsigned char> row_buf;
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AutoBuffer<unsigned char> sub_row;
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AutoBuffer<unsigned char> up_row;
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AutoBuffer<unsigned char> avg_row;
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AutoBuffer<unsigned char> paeth_row;
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z_stream op_zstream1;
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z_stream op_zstream2;
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OP op[6];
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rgb palette[256];
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unsigned char trns[256];
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uint32_t palsize, trnssize;
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uint32_t next_seq_num;
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};
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}
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#endif
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#endif/*_GRFMT_PNG_H_*/
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