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rename CV_LOAD_IMAGE_* enums #7065

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@trixirt trixirt commented Nov 23, 2022

On RHEL 9, opencv-4.6.0-7.el9.x86_64 there is this representative build error.

src/caffe/util/io.cpp:76:34: error: ‘CV_LOAD_IMAGE_COLOR’ was not declared in this scope
76 | int cv_read_flag = (is_color ? CV_LOAD_IMAGE_COLOR :

The header containing this enum has moved to
opencv4/opencv2/imgcodecs/legacy/constants_c.h
And is no longer in the include path.

The replacement mappings are
CV_LOAD_IMAGE_COLOR -> IMREAD_COLOR
CV_LOAD_IMAGE_GRAYSCALE -> IMREAD_GRAYSCALE

from
./opencv4/opencv2/imgcodecs/legacy/constants_c.h
CV_LOAD_IMAGE_GRAYSCALE =0,
CV_LOAD_IMAGE_COLOR =1,
to
./opencv2/imgcodecs.hpp
IMREAD_GRAYSCALE = 0, //!< If set, always convert image to the single channel grayscale image (codec internal conversion).
IMREAD_COLOR = 1, //!< If set, always convert image to the 3 channel BGR color image.

Signed-off-by: Tom Rix trix@redhat.com

On RHEL 9, opencv-4.6.0-7.el9.x86_64 there is this
representative build error.

src/caffe/util/io.cpp:76:34: error: ‘CV_LOAD_IMAGE_COLOR’ was not declared in this scope
   76 |   int cv_read_flag = (is_color ? CV_LOAD_IMAGE_COLOR :

The header containing this enum has moved to
opencv4/opencv2/imgcodecs/legacy/constants_c.h
And is no longer in the include path.

The replacement mappings are
CV_LOAD_IMAGE_COLOR     -> IMREAD_COLOR
CV_LOAD_IMAGE_GRAYSCALE -> IMREAD_GRAYSCALE

from
./opencv4/opencv2/imgcodecs/legacy/constants_c.h
    CV_LOAD_IMAGE_GRAYSCALE  =0,
    CV_LOAD_IMAGE_COLOR      =1,
to
./opencv2/imgcodecs.hpp
       IMREAD_GRAYSCALE            = 0,  //!< If set, always convert image to the single channel grayscale image (codec internal conversion).
       IMREAD_COLOR                = 1,  //!< If set, always convert image to the 3 channel BGR color image.

Signed-off-by: Tom Rix <trix@redhat.com>
@trixirt
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trixirt commented Nov 23, 2022

A much earlier pr
#6919

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