From 510ca53687f7b60cd8e26b0b87ad0438651651f3 Mon Sep 17 00:00:00 2001
From: Leonid Beynenson <no@email>
Date: Thu, 14 Jul 2011 08:36:48 +0000
Subject: [PATCH] Added the function minMaxLoc to JavaAPI as a manual ported
 function. Added test for the function.

---
 .../src/org/opencv/test/core/coreTest.java    |  17 ++-
 modules/java/gen_java.py                      | 101 ++++++++++++++++++
 2 files changed, 117 insertions(+), 1 deletion(-)

diff --git a/modules/java/android_test/src/org/opencv/test/core/coreTest.java b/modules/java/android_test/src/org/opencv/test/core/coreTest.java
index 162d51c97a..ed073dc9a3 100644
--- a/modules/java/android_test/src/org/opencv/test/core/coreTest.java
+++ b/modules/java/android_test/src/org/opencv/test/core/coreTest.java
@@ -588,6 +588,21 @@ public class coreTest extends OpenCVTestCase {
 		core.min(gray0, gray255, dst);
 		assertMatEqual(gray0, dst);		
 	}
+	public void testMinMaxLoc() {
+		double  minVal=1;
+		double maxVal=10;
+		Point minLoc = new Point((int)matSize/4, (int)matSize/2);
+		Point maxLoc = new Point((int)matSize/2, (int)matSize/4);
+		gray3.put((int)minLoc.y, (int)minLoc.x, minVal);
+		gray3.put((int)maxLoc.y, (int)maxLoc.x, maxVal);
+		
+		core.MinMaxLocResult mmres = core.minMaxLoc(gray3);
+		
+		assertTrue(mmres.minVal==minVal 
+				&& mmres.maxVal==maxVal 
+				&& mmres.minLoc.equals(minLoc) 
+				&& mmres.maxLoc.equals(maxLoc));		
+	}
 
 	public void testMulSpectrumsMatMatMatInt() {
 		//TODO: nice example
@@ -917,4 +932,4 @@ public class coreTest extends OpenCVTestCase {
 		fail("Not yet implemented");
 	}
 	
-}
\ No newline at end of file
+}
diff --git a/modules/java/gen_java.py b/modules/java/gen_java.py
index a46fe95143..847f2569a8 100644
--- a/modules/java/gen_java.py
+++ b/modules/java/gen_java.py
@@ -96,6 +96,8 @@ type_dict = {
 
 }
 
+setManualFunctions=set(['minMaxLoc'])
+
 class ConstInfo(object):
     def __init__(self, cname, name, val):
 ##        self.name = re.sub(r"^cv\.", "", name).replace(".", "_")
@@ -239,6 +241,9 @@ class JavaWrapperGenerator(object):
 
     def add_func(self, decl):
         ffi = FuncFamilyInfo(decl)
+	if ffi.jname in setManualFunctions :
+		print "Found function, which is ported manually: " + ffi.jname 
+		return None
         func_map = self.funcs
         classname = ffi.funcs[0].classname
         if classname:
@@ -293,6 +298,43 @@ class JavaWrapperGenerator(object):
             CV_64F = 6,
             CV_USRTYPE1 = 7;
 
+    //Manual ported functions
+
+    // C++: minMaxLoc(Mat src, double* minVal, double* maxVal=0, Point* minLoc=0, Point* maxLoc=0, InputArray mask=noArray()) 
+    //javadoc: minMaxLoc
+    public static class MinMaxLocResult {
+        public double minVal;
+        public double maxVal;
+        public Point minLoc;
+        public Point maxLoc;
+
+	public MinMaxLocResult() {
+	    minVal=0; maxVal=0;
+	    minLoc=new Point();
+	    maxLoc=new Point();
+	}
+    }
+    public static MinMaxLocResult minMaxLoc(Mat src, Mat mask) {
+        MinMaxLocResult res = new MinMaxLocResult();
+        long maskNativeObj=0;
+        if (mask != null) {
+                maskNativeObj=mask.nativeObj;
+        }
+        double resarr[] = n_minMaxLoc(src.nativeObj, maskNativeObj);
+        res.minVal=resarr[0];
+        res.maxVal=resarr[1];
+        res.minLoc.x=resarr[2];
+        res.minLoc.y=resarr[3];
+        res.maxLoc.x=resarr[4];
+        res.maxLoc.y=resarr[5];
+        return res;
+    }
+    public static MinMaxLocResult minMaxLoc(Mat src) {
+        return minMaxLoc(src, null);
+    }
+    private static native double[] n_minMaxLoc(long src_nativeObj, long mask_nativeObj);
+
+
 """ )
 
         if module == "imgproc":
@@ -375,6 +417,65 @@ class JavaWrapperGenerator(object):
         # step 4: generate code for the classes
         self.gen_classes()
 
+        if module == "core":
+            self.cpp_code.write(\
+"""
+JNIEXPORT jdoubleArray JNICALL Java_org_opencv_core_n_1minMaxLoc
+  (JNIEnv* env, jclass cls, jlong src_nativeObj, jlong mask_nativeObj)
+{
+    try {
+#ifdef DEBUG
+        LOGD("core::n_1minMaxLoc()");
+#endif // DEBUG
+
+        jdoubleArray result;
+        result = env->NewDoubleArray(6);
+        if (result == NULL) {
+            return NULL; /* out of memory error thrown */
+        }
+        
+        Mat& src = *((Mat*)src_nativeObj);
+    
+        double minVal, maxVal;
+        Point minLoc, maxLoc;
+        if (mask_nativeObj != 0) {
+            Mat& mask = *((Mat*)mask_nativeObj);
+            minMaxLoc(src, &minVal, &maxVal, &minLoc, &maxLoc, mask);
+        } else {
+            minMaxLoc(src, &minVal, &maxVal, &minLoc, &maxLoc);
+        }
+            
+        jdouble fill[6];
+        fill[0]=minVal;
+        fill[1]=maxVal;
+        fill[2]=minLoc.x;
+        fill[3]=minLoc.y;
+        fill[4]=maxLoc.x;
+        fill[5]=maxLoc.y;
+    
+        env->SetDoubleArrayRegion(result, 0, 6, fill);
+
+	return result;
+
+    } catch(cv::Exception e) {
+#ifdef DEBUG
+        LOGD("core::n_1minMaxLoc() catched cv::Exception: %s", e.what());
+#endif // DEBUG
+        jclass je = env->FindClass("org/opencv/CvException");
+        if(!je) je = env->FindClass("java/lang/Exception");
+        env->ThrowNew(je, e.what());
+        return NULL;
+    } catch (...) {
+#ifdef DEBUG
+        LOGD("core::n_1minMaxLoc() catched unknown exception (...)");
+#endif // DEBUG
+        jclass je = env->FindClass("java/lang/Exception");
+        env->ThrowNew(je, "Unknown exception in JNI code {$module::$fname()}");
+        return NULL;
+    }
+}
+""")
+
         # module tail
         self.java_code.write("\n\n" + self.jn_code.getvalue() + "\n")
         self.java_code.write("}\n")