pkgbase=opencv
pkgname=('opencv' 'opencv-samples')
pkgver=3.4.5
pkgrel=1
pkgdesc="Open Source Computer Vision Library"
arch=('x86_64')
license=('BSD')
url="http://opencv.org"
depends=('gst-plugins-base' 'intel-tbb' 'libcl' 'libgphoto2' 'openblas' 'lapack'
         'libdc1394' 'openexr' 'v4l-utils' 'ffmpeg' 'qt5-base' 'glu' 'python3' 'libgphoto2' 'xine-lib')
makedepends=('pkgconfig' 'cmake' 'mesa' 'python3-numpy' 'eigen3' 'hdf5' 'glew')
optdepends=('python3-numpy: Python 3.x interface'
            'eigen3'
            'hdf5: For hdf5 plugin to work')
source=("opencv-$pkgver.zip::https://github.com/Itseez/opencv/archive/${pkgver}.zip"
        "opencv_contrib-$pkgver.zip::https://github.com/Itseez/opencv_contrib/archive/${pkgver}.zip")
sha1sums=('8d67f847b2f8fb3eb59cc673fd44c31fa066db42'
          'e00531339df96a9319277f776980fc9917ca5805')

prepare() {
  mkdir -p build
}

build() {
  cd build
 
  # cmake's FindLAPACK doesn't add cblas to LAPACK_LIBRARIES, so we need to specify them manually
  cmake ../$pkgname-$pkgver \
    -DWITH_OPENCL=ON \
    -DWITH_OPENGL=ON \
    -DWITH_TBB=ON \
    -DOpenGL_GL_PREFERENCE=GLVND \
    -DBUILD_WITH_DEBUG_INFO=OFF \
    -DBUILD_TESTS=OFF \
    -DBUILD_PERF_TESTS=OFF \
    -DBUILD_EXAMPLES=ON \
    -DINSTALL_C_EXAMPLES=ON \
    -DINSTALL_PYTHON_EXAMPLES=ON \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_INSTALL_LIBDIR=lib \
    -DCPU_BASELINE_DISABLE=SSE3 \
    -DCPU_BASELINE_REQUIRE=SSE2 \
    -DOPENCV_EXTRA_MODULES_PATH="$srcdir/opencv_contrib-$pkgver/modules" \
    -DLAPACK_LIBRARIES="/usr/lib/liblapack.so;/usr/lib/libblas.so;/usr/lib/libopenblas.so" \
    -DLAPACK_CBLAS_H="/usr/include/cblas.h" \
    -DLAPACK_LAPACKE_H="/usr/include/lapacke.h" \
    -DWITH_GTK=OFF \
    -DWITH_QT=5
  make
}

package_opencv() {
  provides=('opencv-qt5')
  conflicts=('opencv-qt5')
  replaces=('opencv-qt5')
  cd build

  make DESTDIR="$pkgdir" install

  # install license file
  install -Dm644 "$srcdir/$pkgbase-$pkgver/LICENSE" \
    "$pkgdir/usr/share/licenses/$pkgname/LICENSE"

  # fix -lippicv not found
  cd "$pkgdir/usr/share"
  ln -s /usr/share/opencv/3rdparty/lib/libippicv.a "$pkgdir/usr/lib"

  # separate samples package; also be -R friendly
  if [[ -d OpenCV/samples ]]; then
    mv OpenCV/samples "$srcdir/$pkgname-samples"
    mv OpenCV $pkgname # otherwise folder naming is inconsistent
  elif [[ ! -d OpenCV ]]; then
    warning "Directory naming issue; samples package may not be built!"
  fi
}

package_opencv-samples() {
  pkgdesc+=" (samples)"
  depends=("opencv=$pkgver")
  unset optdepends

  mkdir -p "$pkgdir/usr/share/opencv"
  cp -r "$srcdir/opencv-samples" "$pkgdir/usr/share/opencv/samples"
  # fix permissions
  chmod 755 "$pkgdir"/usr/share/opencv/samples/*
  
  # install license file
  install -Dm644 "$srcdir/opencv-$pkgver/LICENSE" \
    "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
}