1 files changed, 57 insertions, 0 deletions
diff --git a/jni/filters/shadows.c b/jni/filters/shadows.c
new file mode 100644
index 000000000..38d64c8b5
--- /dev/null
+++ b/jni/filters/shadows.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <math.h>
+#include "filters.h"
+
+void JNIFUNCF(ImageFilterShadows, nativeApplyFilter, jobject bitmap, jint width, jint height, float scale){
+    double shadowFilterMap[] = {
+            -0.00591,  0.0001,
+             1.16488,  0.01668,
+            -0.18027, -0.06791,
+            -0.12625,  0.09001,
+             0.15065, -0.03897
+    };
+
+    char* destination = 0;
+    AndroidBitmap_lockPixels(env, bitmap, (void**) &destination);
+    unsigned char * rgb = (unsigned char * )destination;
+    int i;
+    double s = (scale>=0)?scale:scale/5;
+    int len = width * height * 4;
+
+    double *poly = (double *) malloc(5*sizeof(double));
+    for (i = 0; i < 5; i++) {
+        poly[i] = fastevalPoly(shadowFilterMap+i*2,2 , s);
+    }
+
+    unsigned short * hsv = (unsigned short *)malloc(3*sizeof(short));
+
+    for (i = 0; i < len; i+=4)
+    {
+        rgb2hsv(rgb,i,hsv,0);
+
+        double v = (fastevalPoly(poly,5,hsv[0]/4080.)*4080);
+        if (v>4080) v = 4080;
+        hsv[0] = (unsigned short) ((v>0)?v:0);
+
+        hsv2rgb(hsv,0, rgb,i);
+    }
+
+    free(poly);
+    free(hsv);
+    AndroidBitmap_unlockPixels(env, bitmap);
+}