[Boost-users] [Gil new_io] Some questions and remarks

Hi all, I have just checkout gil-contributions svn repo ( http://code.google.com/p/gil-contributions/) in order to test new_io in which I am really interested. Thank you for this very usefull job! I have however some remarks and questions about some compilation issues. 0) The code seems to have been written and tested on Windows. Am I right (see my remarks thereafter)? For ex., why do you use "\\" in paths (paths.hpp) and not "/"? 1) Which Boost version is required? I first tried with 1.40, but it did not work because of missing accessors in boost::gil::variant (index() and bits()). Did they appear in 1.41 or 1.42? With 1.42, this issue is solved. 2) While compiling tests, I ran into some issues. I am running the code on an Ubuntu 9.10, with g++-4.3.4. I was able to fix some of them, but others are still problematic: 2.1) For each test, I have to add at the beginning the 2 following lines: #define BOOST_TEST_DYN_LINK #define BOOST_TEST_MODULE my application tests It probably comes from my little knowledge of boost unit_test_framework. Could you explain? 2.2) For each test, the compiler gave the following error: /usr/local/include/boost/gil/extension/io_new/detail/dynamic_io_new.hpp:75: error: there are no arguments to ‘io_error’ that depend on a template parameter, so a declaration of ‘io_error’ must be available I simply add in *[...]/detail/dynamic_io_new.hpp* an unclude directive at the beginning of the file : #include . Still do not understand how it can work wihtout this ... 2.3) I had a similar error with *[...]/formats/bmp/read.hpp*: /usr/local/include/boost/gil/extension/io_new/formats/bmp/read.hpp:833: error: there are no arguments to ‘get_info’ that depend on a template parameter, so a declaration of ‘get_info’ must be available I simply changed line 833 from get_info() to parent_t::get_info(). Now works. 2.4) Some typename are missing (still do not know how visual can infer types ...): - [...]/formats/jpeg/read.hpp, line 336: *typename*Image::view_t - [...]/formats/bmp/is_allowed.hpp, line 73: *typename*View::value_type - [...]/formats/pnm/read.hpp, line 419: *typename* Image::view_t Everything works with these changes. 2.5) png_read_test failed. Obviously, this is a portability issue. PNG filenames for testing are uppercase, while they are lowercase in the test code. I think that is also missing in the code the path to png files. For example, in basic_format_test, instead of test_file< gray1_image_t >( "basn0g01.png" ); it soulhd be: test_file< gray1_image_t >(* png_in + "BASN0G01.PNG"* ); I did not rename all files, so I am unable to try the test. 2.6) Some tests fail to compile or link. Here are the errors: - *all_formats_test.cpp*: In file included from /usr/include/png.h:481, from /usr/local/include/boost/gil/extension/io_new/png_tags.hpp:23, from /usr/local/include/boost/gil/extension/io_new/png_read.hpp:22, from /usr/local/include/boost/gil/extension/io_new/png_all.hpp:22, from /home/olivier/work/dev/lib/gil-contributions-read-only/gil_2/libs/gil/io_new/test/all_formats_test.cpp:7: /usr/include/pngconf.h:335: error: expected constructor, destructor, or type conversion before ‘.’ token /usr/include/pngconf.h:336: error: ‘__dont__’ does not name a type - *pnm_reads_test.cpp*: pnm_read_test.cpp.o: In function `pnm_test::read_header_test::test_method()': pnm_read_test.cpp:(.text+0x24c0): undefined reference to `boost::gil::pnm_image_type::_color_asc' collect2: ld returned 1 exit status Do not really understand since _color_asc is a typedef defined in pnm_tags.hpp ... - *jpeg_old_test.cpp* (sorry for the message ...): /usr/local/include/boost/gil/extension/io_new/formats/jpeg/write.hpp: In function ‘typename BinaryOp::result_type boost::gil::detail::apply_operation(const boost::gil::variant<Types>&, const Info&, BinaryOp) [with Types1 = boost::mpl::v_itemboost::gil::rgba8_pixel_t*

...

, boost::mpl::v_itemboost::gil::rgb8_pixel_t* , boost::mpl::v_itemboost::gil::gray16_pixel_t* , boost::mpl::v_itemboost::gil::gray8_pixel_t* , boost::mpl::vector0, 0>, 0>, 0>, 0>, Info = boost::gil::image_write_info, BinaryOp = boost::gil::detail::dynamic_io_fnobjboost::gil::jpeg_tag, boost::gil::jpeg_tag, boost::gil::detail::no_log> >]’: /usr/local/include/boost/gil/extension/io_new/formats/jpeg/write.hpp:283: instantiated from ‘void boost::gil::detail::dynamic_image_writer::apply(const boost::gil::any_image_view<Views>&, const boost::gil::image_write_info&) [with Views = boost::mpl::v_itemboost::gil::rgba8_pixel_t* , boost::mpl::v_itemboost::gil::rgb8_pixel_t* , boost::mpl::v_itemboost::gil::gray16_pixel_t* , boost::mpl::v_itemboost::gil::gray8_pixel_t* , boost::mpl::vector0, 0>, 0>, 0>, 0>, Device = boost::gil::detail::file_stream_deviceboost::gil::jpeg_tag]’ /usr/local/include/boost/gil/extension/io_new/detail/write_view.hpp:302: instantiated from ‘void boost::gil::write_view(Device&, const boost::gil::any_image_view<Types2>&, const boost::gil::image_write_info&, typename boost::enable_if::type, void>::type*) [with Device = boost::gil::detail::file_stream_deviceboost::gil::jpeg_tag, Views = boost::mpl::v_itemboost::gil::rgba8_pixel_t* , boost::mpl::v_itemboost::gil::rgb8_pixel_t* , boost::mpl::v_itemboost::gil::gray16_pixel_t* , boost::mpl::v_itemboost::gil::gray8_pixel_t* , boost::mpl::vector0, 0>, 0>, 0>, 0>, FormatTag = boost::gil::jpeg_tag, Log = boost::gil::detail::no_log]’ /usr/local/include/boost/gil/extension/io_new/detail/write_view.hpp:357: instantiated from ‘void boost::gil::write_view(const String&, const boost::gil::any_image_view<Types2>&, const boost::gil::image_write_info&, typename boost::enable_if::type, void>::type*) [with String = std::basic_string, Views = boost::mpl::v_itemboost::gil::rgba8_pixel_t* , boost::mpl::v_itemboost::gil::rgb8_pixel_t* , boost::mpl::v_itemboost::gil::gray16_pixel_t* , boost::mpl::v_itemboost::gil::gray8_pixel_t* , boost::mpl::vector0, 0>, 0>, 0>, 0>, FormatTag = boost::gil::jpeg_tag, Log = boost::gil::detail::no_log]’ /usr/local/include/boost/gil/extension/io_new/jpeg_io_old.hpp:169: instantiated from ‘void boost::gil::jpeg_write_view(const String&, const View&, int) [with String = std::basic_string, View = boost::gil::any_image_viewboost::gil::rgba8_pixel_t* , boost::mpl::v_itemboost::gil::rgb8_pixel_t* , boost::mpl::v_itemboost::gil::gray16_pixel_t* , boost::mpl::v_itemboost::gil::gray8_pixel_t* , boost::mpl::vector0, 0>, 0>, 0>, 0> >]’ /home/olivier/work/dev/lib/gil-contributions-read-only/gil_2/libs/gil/io_new/test/jpeg_old_test.cpp:98: instantiated from here /usr/local/include/boost/gil/extension/io_new/formats/jpeg/write.hpp:243: error: invalid initialization of non-const reference of type ‘boost::gil::variantboost::gil::rgba8_pixel_t* , boost::mpl::v_itemboost::gil::rgb8_pixel_t* , boost::mpl::v_itemboost::gil::gray16_pixel_t* , boost::mpl::v_itemboost::gil::gray8_pixel_t* , boost::mpl::vector0, 0>, 0>, 0>, 0> >::base_t&’ from a temporary of type ‘boost::gil::variantboost::gil::rgba8_pixel_t* , boost::mpl::v_itemboost::gil::rgb8_pixel_t* , boost::mpl::v_itemboost::gil::gray16_pixel_t* , boost::mpl::v_itemboost::gil::gray8_pixel_t* , boost::mpl::vector0, 0>, 0>, 0>, 0> >::base_t’ /usr/local/include/boost/gil/extension/io_new/formats/jpeg/write.hpp:213: error: in passing argument 1 of ‘typename Op::result_type boost::gil::detail::apply_operation_base(Bits&, size_t, const Info&, Op) [with Types = boost::mpl::v_itemboost::gil::rgba8_pixel_t* , boost::mpl::v_itemboost::gil::rgb8_pixel_t* , boost::mpl::v_itemboost::gil::gray16_pixel_t* , boost::mpl::v_itemboost::gil::gray8_pixel_t* , boost::mpl::vector0, 0>, 0>, 0>, 0>, Info = boost::gil::image_write_info, Bits = boost::gil::variantboost::gil::rgba8_pixel_t* , boost::mpl::v_itemboost::gil::rgb8_pixel_t* , boost::mpl::v_itemboost::gil::gray16_pixel_t* , boost::mpl::v_itemboost::gil::gray8_pixel_t* , boost::mpl::vector0, 0>, 0>, 0>, 0> >::base_t, Op = boost::gil::detail::dynamic_io_fnobjboost::gil::jpeg_tag, boost::gil::jpeg_tag, boost::gil::detail::no_log> >]’ /usr/local/include/boost/gil/extension/io_new/formats/jpeg/write.hpp:243: error: return-statement with a value, in function returning 'void'

Apart png_read_test and its case sensitive problem, all compiled and linked tests run successfully. This is a really good new! However, could you please help regarding the issues above? Please note that if you are intersted in a Linux developper/tester for gil, I am wiling to do some jobs ... Best regards, Olivier