Windows: use opencv from Rtools when available (R >= 4.5)

Author: jeroen

.github/workflows/R-CMD-check.yaml

@@ -22,7 +22,9 @@ jobs:
           - {os: macos-14,        r: 'release'}
           - {os: windows-latest,  r: '4.1'}
           - {os: windows-latest,  r: '4.2'}
-          - {os: windows-latest,  r: 'release'}
+          - {os: windows-latest,  r: '4.3'}
+          - {os: windows-latest,  r: '4.4'}
+          - {os: windows-latest,  r: 'devel'}
           - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
           - {os: ubuntu-latest,   r: 'release'}
           - {os: ubuntu-latest,   r: 'oldrel-1'}

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: opencv
 Type: Package
 Title: Bindings to 'OpenCV' Computer Vision Library
-Version: 0.4.1
+Version: 0.5.0
 Authors@R: c(
     person("Jeroen", "Ooms", role = c("aut", "cre"), email = "jeroenooms@gmail.com", 
       comment = c(ORCID = "0000-0002-4035-0289")),

NEWS

@@ -1,3 +1,6 @@
+0.5.0
+  - Windows: use opencv from Rtools when available (R >= 4.5)
+
 0.4.0
   - Add QR code detector
   - Windows: update to libopencv 4.8.1

src/Makevars.win

@@ -1,21 +1,35 @@
+PKG_CONFIG_NAME = opencv4
+PKG_CONFIG ?= $(BINPREF)pkg-config
+PKG_LIBS := $(shell $(PKG_CONFIG) --libs $(PKG_CONFIG_NAME))
+
+ifneq ($(findstring wechat,$(PKG_LIBS)),)
+$(info using $(PKG_CONFIG_NAME) from Rtools)
+PKG_CPPFLAGS := $(shell $(PKG_CONFIG) --cflags $(PKG_CONFIG_NAME))
+OPENCVDATA := $(shell $(PKG_CONFIG) --variable=prefix $(PKG_CONFIG_NAME))/share/opencv4
+else
 RWINLIB = ../windows/opencv
 PKG_CPPFLAGS = -I$(RWINLIB)/include/opencv4 -DHAVE_XFEATURES2D
 OLDLIBDIR = lib${subst gcc,,${COMPILED_BY}}${R_ARCH}
-
 PKG_LIBS = \
 	-L$(RWINLIB)/$(OLDLIBDIR) \
 	-L$(RWINLIB)/lib \
 	-lopencv_ml481 -lopencv_objdetect481 -lopencv_photo481 -lopencv_stitching481 -lopencv_wechat_qrcode481 -lopencv_dnn481 \
 	-lopencv_video481 -lopencv_calib3d481 -lopencv_xfeatures2d481 -lopencv_features2d481 -lopencv_highgui481 -lopencv_flann481 \
 	-lopencv_videoio481 -lopencv_imgcodecs481 -lopencv_imgproc481 -lopencv_core481 -llibopenjp2 -lquirc \
 	-ljpeg -lwebp -lsharpyuv -lpng -lz -ltiff -lpthread -lgdi32 -lole32 -lopengl32 -lcomdlg32 -lOleAut32 -luuid
+OPENCVDATA = $(RWINLIB)/share
+endif
+
+all: $(SHLIB) copydata
 
-all: clean winlibs
+$(OBJECTS): $(RWINLIB)
+
+$(RWINLIB):
+	"${R_HOME}/bin${R_ARCH_BIN}/Rscript.exe" "../tools/winlibs.R"
+
+copydata:
+	rm -Rf ../inst/share && mkdir -p ../inst
+	cp -Rf $(OPENCVDATA) ../inst/share
 
 clean:
 	rm -f $(SHLIB) $(OBJECTS)
-
-winlibs:
-	"${R_HOME}/bin${R_ARCH_BIN}/Rscript.exe" "../tools/winlibs.R" ${VERSION}
-	mkdir -p ../inst
-	cp -r $(RWINLIB)/share ../inst/