The tests cover issue #117 and pull request #118, extending the coverage
for all color types that may have tRNS chunks:
- color type 0 (grayscale), the tRNS chunk contains a single gray level
- color type 2 (truecolor), the tRNS chunk contains a single RGB color
- color type 3 (indexed color), the tRNS chunk contains a series of
one-byte alpha values
Add sample PNG files from the "official" test-suite for PNG
created by Willem van Schaik.
Add <define>BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES to Jamfile for PNG tests.
NOTE: Deliberately not defined BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
as it seems to require some extra configuration, currently it causes
some tests to fail. So, Jamfile likely needs more updates and clean-up.
Closes#120
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).
