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   31 #ifndef PNGPP_WRITER_HPP_INCLUDED 
   32 #define PNGPP_WRITER_HPP_INCLUDED 
   65     template< 
class ostream >
 
   75             : 
io_base(png_create_write_struct(PNG_LIBPNG_VER_STRING,
 
   80             png_set_write_fn(
m_png, & stream, write_data, flush_data);
 
   91             if (setjmp(png_jmpbuf(
m_png)))
 
  106             if (setjmp(png_jmpbuf(
m_png)))
 
  118             if (setjmp(png_jmpbuf(
m_png)))
 
  122             png_write_row(
m_png, bytes);
 
  130             if (setjmp(png_jmpbuf(
m_png)))
 
  138         static void write_data(png_struct* 
png, 
byte* data, png_size_t length)
 
  143             ostream* stream = 
reinterpret_cast< ostream* 
>(png_get_io_ptr(
png));
 
  146                 stream->write(
reinterpret_cast< char* 
>(data), length);
 
  149                     wr->
set_error(
"ostream::write() failed");
 
  152             catch (std::exception 
const& error)
 
  158                 assert(!
"caught something wrong");
 
  159                 wr->
set_error(
"write_data: caught something wrong");
 
  167         static void flush_data(png_struct* 
png)
 
  172             ostream* stream = 
reinterpret_cast< ostream* 
>(png_get_io_ptr(
png));
 
  178                     wr->set_error(
"ostream::flush() failed");
 
  181             catch (std::exception 
const& error)
 
  183                 wr->set_error(error.what());
 
  187                 assert(!
"caught something wrong");
 
  188                 wr->set_error(
"flush_data: caught something wrong");
 
  199 #endif // PNGPP_WRITER_HPP_INCLUDED 
  
std::string m_error
Definition: io_base.hpp:462
void write_end_info() const
Reads ending info about PNG image.
Definition: writer.hpp:128
void destroy()
Definition: end_info.hpp:53
void reset_error()
Definition: io_base.hpp:430
png_struct * m_png
Definition: io_base.hpp:459
bool is_error() const
Definition: io_base.hpp:442
Base class for PNG reader/writer classes.
Definition: io_base.hpp:63
io_base(png_struct *png)
Definition: io_base.hpp:68
info m_info
Definition: io_base.hpp:460
png_info ** get_png_info_ptr()
Definition: info_base.hpp:64
void write() const
Definition: info.hpp:116
Exception class to represent runtime errors related to png++ operation.
Definition: error.hpp:59
~writer()
Definition: writer.hpp:83
void write_row(byte *bytes)
Writes a row of image data at a time.
Definition: writer.hpp:116
end_info m_end_info
Definition: io_base.hpp:461
PNG writer class template. This is the low-level writing interface–use image class or generator class...
Definition: writer.hpp:68
void write_png() const
Definition: writer.hpp:89
void write() const
Definition: end_info.hpp:64
void set_error(char const *message)
Definition: io_base.hpp:424
writer(ostream &stream)
Constructs a writer prepared to write PNG image into a stream.
Definition: writer.hpp:74
void raise_error()
Definition: io_base.hpp:447
png_info * get_png_info() const
Definition: info_base.hpp:59
void write_info() const
Write info about PNG image.
Definition: writer.hpp:104