matlab: Use OpenCV_SOURCE_DIR instead of CMAKE_SOURCE_DIR to find the modules root
* Set HDR_PARSER_PATH using OpenCV_SOURCE_DIR var
This sets the `HDR_PARSER_PATH` variable using `OpenCV_SOURCE_DIR` instead of using `CMAKE_SOURCE_DIR`.
This allows for more flexibility in how the user's project can be structured.
* Find OpenCV module root using OpenCV_SOURCE_DIR
- broken bindings generator
- broken conversion functions (uses non-supported cv::Mat types)
- other problems like missing convertion functions for Moments and other structs
This patch fixes Matlab binding generation for modules that are
part of opencv_contrib (xfeatures2d specifically), and are therefore
not located in ${CMAKE_SOURCE_DIR}/modules.
For this, gen_matlab.py script is extended to accept multiple values
for --modules-root argument, and to check for a module's header in
all possible paths. This way, both ${CMAKE_SOURCE_DIR}/modules and
${OPENCV_EXTRA_MODULES_PATH} can be passed as modules root paths,
and main header for xfeatures2d module is correctly located.
Mathijs de Groot
Gary Allen
Alexander Alekhin
Alexander Alekhin
Alexander Alekhin
Yang Fan
StevenPuttemans
Rok Mandeljc
Vadim Pisarevsky