# Maintainer: Antonio Rojas <arojas@archlinux.org>
# Contributor: Ray Rashif <schiv@archlinux.org>
# Contributor: Tobias Powalowski <tpowa@archlinux.org>

# ALARM: Kevin Mihelich <kevin@archlinuxarm.org>
#  - remove -DCPU_BASELINE_{ENABLE,DISABLE} flags for SSE
#  - remove cuda package

pkgbase=opencv
pkgname=(opencv opencv-samples python-opencv)
pkgver=4.6.0
pkgrel=7
pkgdesc='Open Source Computer Vision Library'
arch=(x86_64)
license=(BSD)
url='https://opencv.org/'
depends=(tbb openexr gst-plugins-base libdc1394 cblas lapack libgphoto2 openjpeg2 ffmpeg protobuf)
makedepends=(cmake python-numpy python-setuptools mesa eigen hdf5 lapacke qt5-base vtk glew ant java-environment pugixml openmpi fmt)
optdepends=('opencv-samples: samples'
            'vtk: for the viz module'
            'glew: for the viz module'
            'qt5-base: for the HighGUI module'
            'hdf5: for the HDF5 module'
            'opencl-icd-loader: For coding with OpenCL'
            'java-runtime: Java interface')
source=(https://github.com/opencv/opencv/archive/$pkgver/$pkgname-$pkgver.tar.gz
        https://github.com/opencv/opencv_contrib/archive/$pkgver/opencv_contrib-$pkgver.tar.gz
        https://github.com/opencv/opencv/commit/496eed95.patch
        vtk9.patch)
sha256sums=('1ec1cba65f9f20fe5a41fda1586e01c70ea0c9a6d7b67c9e13edf0cfe2239277'
            '1777d5fd2b59029cf537e5fd6f8aa68d707075822f90bde683fcde086f85f7a7'
            '28edbd94c443b6aaa3054b4f9b35a4ad9a89dc45f40d408bcf3036950a072a32'
            'f35a2d4ea0d6212c7798659e59eda2cb0b5bc858360f7ce9c696c77d3029668e')

prepare() {
  patch -d $pkgname-$pkgver -p1 < vtk9.patch # Don't require all vtk optdepends
  patch -d $pkgname-$pkgver -p1 < 496eed95.patch # Fix build with ffmpeg 5.1
}

build() {
  export JAVA_HOME="/usr/lib/jvm/default"
  # cmake's FindLAPACK doesn't add cblas to LAPACK_LIBRARIES, so we need to specify them manually
  _opts="-DWITH_OPENCL=ON \
         -DWITH_OPENGL=ON \
         -DWITH_TBB=ON \
         -DWITH_VULKAN=ON \
         -DWITH_QT=ON \
         -DBUILD_WITH_DEBUG_INFO=OFF \
         -DBUILD_TESTS=OFF \
         -DBUILD_PERF_TESTS=OFF \
         -DBUILD_EXAMPLES=ON \
         -DBUILD_PROTOBUF=OFF \
         -DPROTOBUF_UPDATE_FILES=ON \
         -DINSTALL_C_EXAMPLES=ON \
         -DINSTALL_PYTHON_EXAMPLES=ON \
         -DCMAKE_INSTALL_PREFIX=/usr \
         -DOPENCV_EXTRA_MODULES_PATH=$srcdir/opencv_contrib-$pkgver/modules \
         -DOPENCV_SKIP_PYTHON_LOADER=ON \
         -DLAPACK_LIBRARIES=/usr/lib/liblapack.so;/usr/lib/libblas.so;/usr/lib/libcblas.so \
         -DLAPACK_CBLAS_H=/usr/include/cblas.h \
         -DLAPACK_LAPACKE_H=/usr/include/lapacke.h \
         -DOPENCV_GENERATE_PKGCONFIG=ON \
         -DOPENCV_ENABLE_NONFREE=ON \
         -DOPENCV_JNI_INSTALL_PATH=lib \
         -DOPENCV_GENERATE_SETUPVARS=OFF \
         -DEIGEN_INCLUDE_PATH=/usr/include/eigen3"
 
  cmake -B build -S $pkgname-$pkgver $_opts
  cmake --build build
}

package_opencv() {
  DESTDIR="$pkgdir" cmake --install build

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

  # separate samples package
  mv "$pkgdir"/usr/share/opencv4/samples "$srcdir"

  # Add java symlinks expected by some binary blobs
  ln -sr "$pkgdir"/usr/share/java/{opencv4/opencv-${pkgver//./},opencv}.jar
  ln -sr "$pkgdir"/usr/lib/{libopencv_java${pkgver//./},libopencv_java}.so

  # Split Python bindings
  rm -r "$pkgdir"/usr/lib/python3*
}

package_opencv-samples() {
  pkgdesc+=' (samples)'
  depends=(opencv)
  unset optdepends

  mkdir -p "$pkgdir"/usr/share/opencv4
  mv samples "$pkgdir"/usr/share/opencv4

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

package_python-opencv() {
  pkgdesc='Python bindings for OpenCV'
  depends=(python-numpy opencv vtk glew qt5-base hdf5 jsoncpp openmpi pugixml fmt)
  unset optdepends

  DESTDIR="$pkgdir" cmake --install build/modules/python3

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