Align with `subsampled_view` overloads accepting `point_t` and `coord_t`
Both types are based on `std::ptrdiff_t`. Fixes compilation warnings.
Tidy up `subimage_view` and `subsampled_view` with trailing return.
Add tests for `subimage_view` in core and dynamic_image extension.
(First tests for the dynamic_image, hurray! :))
Add explicit cast to double in division operator for point<T> to
fix compilation warnings.
Add basic run-time test of `planar_rgba_view` function.
Add missing includes of `pixel.hpp` and `planar_pixel_reference.hpp`
also required for successful compilation.
Fixes#331
Avoid Clang flooding with non-disableable warnings like:
T does not declare any constructor to initialize its non-modifiable members
when compiling with concepts check enabled.
Bug 41759: `warn_no_constructor_for_refconst` can not be disabled (Boost.ConceptCheck)
https://bugs.llvm.org/show_bug.cgi?id=41759
Split header tests accordingly i.e. test core headers as part of
core tests, numeric extension headers as part of numeric tests, etc.
It extends the convention of sub-directories already established in
`include/boost/gil` directory. It is sensible to follow it in other
areas of the source tree (i.e. `test/`, `doc/` and `benchmark/`).
Another important reason to move the tests is to enable removal of
the top-level `Jamfile` with all its definitions of test-specific
requirements.
The top-level `Jamfile` is not advised, especially if it specifies
build requirements like C++ language version.
Those affect non-tests builds e.g. documentation, causing failures
during generation of HTML documentation (leads to missing docs).
