Adding package features for Dlib and OpenCV

Dlib - Package feature for blas (dlib is compatiable with Intel MKL) and CUDA
OpenCV - Added option to integrate GDCM support (to read DICOM files)

ports/dlib/CONTROL

@@ -2,3 +2,10 @@ Source: dlib
 Version: 19.7
 Build-Depends: libjpeg-turbo, libpng, sqlite3, fftw3
 Description: Modern C++ toolkit containing machine learning algorithms and tools for creating complex software in C++
+
+Feature: blas
+Description: BLAS support for dlib
+
+Feature: cuda
+Build-Depends: cuda
+Description: CUDA support for dlib

ports/dlib/portfile.cmake

@@ -17,6 +17,16 @@ file(READ "${SOURCE_PATH}/dlib/CMakeLists.txt" DLIB_CMAKE)
 string(REPLACE "PNG_LIBRARY" "PNG_LIBRARIES" DLIB_CMAKE "${DLIB_CMAKE}")
 file(WRITE "${SOURCE_PATH}/dlib/CMakeLists.txt" "${DLIB_CMAKE}")
 
+set(WITH_BLAS OFF)
+if("blas" IN_LIST FEATURES)
+  set(WITH_BLAS ON)
+endif()
+
+set(WITH_CUDA OFF)
+if("cuda" IN_LIST FEATURES)
+  set(WITH_CUDA ON)
+endif()
+
 vcpkg_configure_cmake(
     SOURCE_PATH ${SOURCE_PATH}
     PREFER_NINJA 
@@ -25,12 +35,11 @@ vcpkg_configure_cmake(
         -DDLIB_USE_FFTW=ON
         -DDLIB_PNG_SUPPORT=ON
         -DDLIB_JPEG_SUPPORT=ON
-        -DDLIB_USE_BLAS=OFF
+        -DDLIB_USE_BLAS=${WITH_BLAS}
         -DDLIB_USE_LAPACK=OFF
-        -DDLIB_USE_CUDA=OFF
+        -DDLIB_USE_CUDA=${WITH_CUDA}
         -DDLIB_GIF_SUPPORT=OFF
         -DDLIB_USE_MKL_FFT=OFF
-        #-DDLIB_USE_CUDA=ON
     OPTIONS_DEBUG
         -DDLIB_ENABLE_ASSERTS=ON
         #-DDLIB_ENABLE_STACK_TRACE=ON

ports/opencv/CONTROL

@@ -21,3 +21,7 @@ Description: Qt GUI support for opencv
 Feature: vtk
 Build-Depends: vtk
 Description: vtk support for opencv
+
+Feature: gdcm
+Build-Depends: gdcm2
+Description: GDCM support for opencv

ports/opencv/portfile.cmake

@@ -58,6 +58,11 @@ if("vtk" IN_LIST FEATURES)
   set(WITH_VTK ON)
 endif()
 
+set(WITH_GDCM OFF)
+if("gdcm" IN_LIST FEATURES)
+  set(WITH_GDCM ON)
+endif()
+
 set(WITH_MSMF ON)
 if(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
   set(WITH_MSMF OFF)
@@ -112,6 +117,7 @@ vcpkg_configure_cmake(
         -DWITH_OPENGL=ON
         -DWITH_QT=${WITH_QT}
         -DWITH_VTK=${WITH_VTK}
+        -DWITH_GDCM=${WITH_GDCM}
     OPTIONS_DEBUG
         -DINSTALL_HEADERS=OFF
         -DINSTALL_OTHER=OFF