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core: allow to construct CvMat from native cv::Mat pointer. #864

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core: allow to construct CvMat from native cv::Mat pointer. #864

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Commits on Jun 29, 2021

  1. core: allow to construct CvMat from native cv::Mat pointer. 

    This patch solves the use-case when there is a mix of native code that
uses opencv and gocv.
In case that native code that utilizes opencv creates a CvMat and there
is a need to pass it to the golang environment without creating a copy.

The solution is to pass a native pointer to gocv and eventually call
cv::Mat copy constructor that performs shallow copy of the origin CvMat.

(See
https://docs.opencv.org/4.5.2/d3/d63/classcv_1_1Mat.html#a294eaf8a95d2f9c7be19ff594d06278e)
for more details.
    @solganik
    solganik committed Jun 29, 2021
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