Include additional core headers conditionally

Author: twistedfall

src_cpp/core.hpp

@@ -1,11 +1,17 @@
 #include "ocvrs_common.hpp"
 #include <opencv2/core/affine.hpp>
-#include <opencv2/core/directx.hpp>
-#include <opencv2/core/ocl.hpp>
-#include <opencv2/core/va_intel.hpp>
-#include <opencv2/core/cuda.hpp>
-#include <opencv2/core/opengl.hpp>
-#include <opencv2/core/directx.hpp>
+#ifdef HAVE_OPENCL
+	#include <opencv2/core/ocl.hpp>
+	// opengl.hpp, va_intel.hpp and directx.hpp unconditionally include ocl.hpp thus it needs to be within ifdef HAVE_OPENCL
+	#ifdef HAVE_OPENGL
+		#include <opencv2/core/opengl.hpp>
+	#endif
+	#include <opencv2/core/va_intel.hpp>
+	#include <opencv2/core/directx.hpp>
+#endif
+#ifdef HAVE_CUDA
+	#include <opencv2/core/cuda.hpp>
+#endif
 #if (CV_VERSION_MAJOR == 3 && CV_VERSION_MINOR == 4 && CV_VERSION_REVISION >= 4) /* 3.4.4+ */ \
 	|| (CV_VERSION_MAJOR == 4) /* 4.0+ */ \
 	|| (CV_VERSION_MAJOR == 5) /* 5.0+ */

src_cpp/ocvrs_common.hpp

@@ -1,10 +1,11 @@
 #ifndef __OCVRS_COMMON_HPP__
 #define __OCVRS_COMMON_HPP__
 
-#if defined(_WIN32) || defined(_WIN64) || defined(__WIN32__) || defined(__TOS_WIN__) || defined(__WINDOWS__) \
- || defined(__CYGWIN__) || defined(__MINGW32__) || defined(__BORLANDC__)
-	#define OCVRS_TARGET_OS_WINDOWS
-#endif
+#include <memory>
+#include <opencv2/cvconfig.h>
+// defining HAVE_VA starts to rely on <va/va.h> for VADisplay and VASurfaceID instead of OpenCV stubs, and we stop generating
+// bindings for the functions that use them
+#undef HAVE_VA
 
 #define CV_COLLECT_IMPL_DATA
 #ifdef OCVRS_PARSING_HEADERS
@@ -15,9 +16,13 @@
 	#define OCVRS_FFI_EXPORT_SUFFIX
 #endif
 
-#include <memory>
 #include <opencv2/core.hpp>
 
+#if defined(_WIN32) || defined(_WIN64) || defined(__WIN32__) || defined(__TOS_WIN__) || defined(__WINDOWS__) \
+ || defined(__CYGWIN__) || defined(__MINGW32__) || defined(__BORLANDC__)
+	#define OCVRS_TARGET_OS_WINDOWS
+#endif
+
 #define OCVRS_ONLY_DEPENDENT_TYPES
 
 #define OCVRS_HANDLE(code, msg, return_name) Err(code, msg, return_name)