opencv/modules/imgcodecs/src/grfmt_png.hpp
2018-03-28 17:57:59 +03:00

102 lines
3.3 KiB
C++

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#ifndef _GRFMT_PNG_H_
#define _GRFMT_PNG_H_
#ifdef HAVE_PNG
#include "grfmt_base.hpp"
#include "bitstrm.hpp"
namespace cv
{
class PngDecoder CV_FINAL : public BaseImageDecoder
{
public:
PngDecoder();
virtual ~PngDecoder();
bool readData( Mat& img ) CV_OVERRIDE;
bool readHeader() CV_OVERRIDE;
void close();
ImageDecoder newDecoder() const CV_OVERRIDE;
protected:
static void readDataFromBuf(void* png_ptr, uchar* dst, size_t size);
int m_bit_depth;
void* m_png_ptr; // pointer to decompression structure
void* m_info_ptr; // pointer to image information structure
void* m_end_info; // pointer to one more image information structure
FILE* m_f;
int m_color_type;
size_t m_buf_pos;
};
class PngEncoder CV_FINAL : public BaseImageEncoder
{
public:
PngEncoder();
virtual ~PngEncoder();
bool isFormatSupported( int depth ) const CV_OVERRIDE;
bool write( const Mat& img, const std::vector<int>& params ) CV_OVERRIDE;
ImageEncoder newEncoder() const CV_OVERRIDE;
protected:
static void writeDataToBuf(void* png_ptr, uchar* src, size_t size);
static void flushBuf(void* png_ptr);
};
}
#endif
#endif/*_GRFMT_PNG_H_*/