G-API: Add output allocation tests for backends (#15012)
* Add output tests for backends
* Fix large size test: output is in fact reallocated
* Use cv::Mat copies for reallocation tracking
* Separate LargeSizeWithCorrectSubmatrix test
* Rename backed output allocation tests
* Address code review feedback
Update test names
Add illustrative "expect (non-)empty" checks
Rename mat "copy" to mat reference
Add more pointer checks
* Add illustrative checks
G-API: Introduce new approach to write accuracy tests (#14757)
* G-API: Introduce new common accuracy test fixture
* Enable Range<> to Seq<> implicit conversion
* Fix shadowing parameters
* Update license headers
* Rename ALIGNED_TYPE to SAME_TYPE
* Move MkRange to tests
* Fix TODO(agolubev) in test instantiations
* Squash simple fixture declarations in one line
* Remove unused line
* Fix Windows issues with macro expansion
* Choose between 1 or 2 matrix initialization
* Redesign common class behavior
Use "views" for GetParam() provided by GTest
base class instead of doing segregation
(with copy!) of common and specific parameters:
request common or specific parameter directly
by index from GetParam()-returned parameters
* Refine user-level API and usage of new test model
* Fix -fpermissive errors
* Remove unnecessary init calls
* Replace GCompileArgs member variable with func ptr
* Rename initMatsRandN to make its behavior explicit
Rename initMatsRandN to initMatrixRandN to eliminate confusion:
initMatsRandN only initialized first matrix (similarly to
initMatrixRandU)
* Fix common of initNothing
* Update copyright dates in missed files
* Add check for specific parameters
* Fix coment stlye
G-API: Add parameters alpha and beta in tests on ConvertTo kernel (#14684)
* Add parameters alpha and beta in tests on ConvertTo kernel
* Change tolerance function
* Reduce number of test cases
More fixes for G-API tests (#13251)
* scalar comparator and more fixes for tests
* add weighted aligned
* white space
* more white space
* Add weighted test accuracy check enabled
G-API GPU-OpenCL backend (#13008)
* gpu/ocl backend core
* accuracy tests added and adjusted + license headers
* GPU perf. tests added; almost all adjusted to pass
* all tests adjusted and passed - ready for pull request
* missing license headers
* fix warning (workaround RGB2Gray)
* fix c++ magic
* precompiled header
* white spaces
* try to fix warning and blur test
* try to fix Blur perf tests
* more alignments with the latest cpu backend
* more gapi tests refactoring + 1 more UB issue fix + more informative tolerance exceed reports
* white space fix
* try workaround for SumTest
* GAPI_EXPORTS instead CV_EXPORTS
