On 18 July 2018 at 15:05, Frédéric via Boost-users
> Is it possible to read/write an image as JPEG from/into a memory
> buffer instead of a file?
I assume you mean using something like a stringstream as an in-memory buffer. The test suite has some examples, like:
BOOST_AUTO_TEST_CASE( stream_test )
// 1. Read an image.
std::ifstream in( jpeg_filename.c_str(), ios::binary );
read_image( in, img, tag_t() );
// 2. Write image to in-memory buffer.
std::stringstream out_buffer( ios_base::in | ios_base::out | ios_base::binary );
write_view( out_buffer, view( img ), tag_t() );
// 3. Copy in-memory buffer to another.
std::stringstream in_buffer( ios_base::in | ios_base::out | ios_base::binary );
in_buffer << out_buffer.rdbuf();
// 4. Read in-memory buffer to gil image
read_image( in_buffer, dst, tag_t() );
// 5. Write out image.
std::string filename( jpeg_out + "stream_test.jpg" );
std::ofstream out( filename.c_str(), ios_base::binary );
write_view( out, view( dst ), tag_t() );
Does that help?