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authorJohn Hoford <hoford@google.com>2012-10-03 01:12:03 (GMT)
committerJohn Hoford <hoford@google.com>2012-10-03 01:32:36 (GMT)
commit7c46d38c4a1df9712f808260ec56995cb77aa4a2 (patch)
tree54a683d7f0326b4b28ca3e1add65acee3ec9924d /jni
parentb8bf8a5b773e5f049b80a082177c6398a95ddd4a (diff)
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Add Shadow feature
bug:7234321 Change-Id: Ib0d4db773486e469ed818385b68b7b907070c297
Diffstat (limited to 'jni')
-rw-r--r--jni/Android.mk2
-rw-r--r--jni/filters/filters.h3
-rw-r--r--jni/filters/hsv.c144
-rw-r--r--jni/filters/shadows.c39
4 files changed, 188 insertions, 0 deletions
diff --git a/jni/Android.mk b/jni/Android.mk
index 38fa453..f6c3c81 100644
--- a/jni/Android.mk
+++ b/jni/Android.mk
@@ -30,6 +30,8 @@ LOCAL_SRC_FILES := filters/bw.c \
filters/exposure.c \
filters/contrast.c \
filters/hue.c \
+ filters/shadows.c \
+ filters/hsv.c \
filters/vignette.c
LOCAL_CFLAGS += -ffast-math -O3 -funroll-loops
diff --git a/jni/filters/filters.h b/jni/filters/filters.h
index 44a4422..954d02d 100644
--- a/jni/filters/filters.h
+++ b/jni/filters/filters.h
@@ -45,4 +45,7 @@ typedef unsigned int Color;
__inline__ unsigned char clamp(int c);
+extern void rgb2hsv( unsigned char *rgb,int rgbOff,unsigned short *hsv,int hsvOff);
+extern void hsv2rgb(unsigned short *hsv,int hsvOff,unsigned char *rgb,int rgbOff);
+
#endif // FILTERS_H
diff --git a/jni/filters/hsv.c b/jni/filters/hsv.c
new file mode 100644
index 0000000..af438f8
--- /dev/null
+++ b/jni/filters/hsv.c
@@ -0,0 +1,144 @@
+/*
+ * 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 rgb2hsv( unsigned char *rgb,int rgbOff,unsigned short *hsv,int hsvOff)
+{
+ int iMin,iMax,chroma;
+ int ABITS = 4;
+ int HSCALE = 256;
+
+ int k1=255 << ABITS;
+ int k2=HSCALE << ABITS;
+
+ int ri = rgb[rgbOff+0];
+ int gi = rgb[rgbOff+1];
+ int bi = rgb[rgbOff+2];
+ short rv,rs,rh;
+
+ if (ri > gi) {
+ iMax = MAX (ri, bi);
+ iMin = MIN (gi, bi);
+ } else {
+ iMax = MAX (gi, bi);
+ iMin = MIN (ri, bi);
+ }
+
+ chroma = iMax - iMin;
+ // set value
+ rv = (short)( iMax << ABITS);
+
+ // set saturation
+ if (rv == 0)
+ rs = 0;
+ else
+ rs = (short)((k1*chroma)/iMax);
+
+ // set hue
+ if (rs == 0)
+ rh = 0;
+ else {
+ if ( ri == iMax ) {
+ rh = (short)( (k2*(6*chroma+gi - bi))/(6*chroma));
+ if (rh >= k2) rh -= k2;
+ } else if (gi == iMax)
+ rh = (short)( (k2*(2*chroma+bi - ri ))/(6*chroma));
+ else // (bi == iMax )
+ rh = (short)( (k2*(4*chroma+ri - gi ))/(6*chroma));
+ }
+ hsv[hsvOff+0] = rv;
+ hsv[hsvOff+1] = rs;
+ hsv[hsvOff+2] = rh;
+ }
+
+ void hsv2rgb(unsigned short *hsv,int hsvOff, unsigned char *rgb,int rgbOff)
+ {
+ int ABITS = 4;
+ int HSCALE = 256;
+ int m;
+ int H,X,ih,is,iv;
+ int k1=255<<ABITS;
+ int k2=HSCALE<<ABITS;
+ int k3=1<<(ABITS-1);
+ int rr=0;
+ int rg=0;
+ int rb=0;
+ short cv = hsv[hsvOff+0];
+ short cs = hsv[hsvOff+1];
+ short ch = hsv[hsvOff+2];
+
+ // set chroma and min component value m
+ //chroma = ( cv * cs )/k1;
+ //m = cv - chroma;
+ m = ((int)cv*(k1 - (int)cs ))/k1;
+
+ // chroma == 0 <-> cs == 0 --> m=cv
+ if (cs == 0) {
+ rb = ( rg = ( rr =( cv >> ABITS) ));
+ } else {
+ ih=(int)ch;
+ is=(int)cs;
+ iv=(int)cv;
+
+ H = (6*ih)/k2;
+ X = ((iv*is)/k2)*(k2- abs(6*ih- 2*(H>>1)*k2 - k2)) ;
+
+ // removing additional bits --> unit8
+ X=( (X+iv*(k1 - is ))/k1 + k3 ) >> ABITS;
+ m=m >> ABITS;
+
+ // ( chroma + m ) --> cv ;
+ cv=(short) (cv >> ABITS);
+ switch (H) {
+ case 0:
+ rr = cv;
+ rg = X;
+ rb = m;
+ break;
+ case 1:
+ rr = X;
+ rg = cv;
+ rb = m;
+ break;
+ case 2:
+ rr = m;
+ rg = cv;
+ rb = X;
+ break;
+ case 3:
+ rr = m;
+ rg = X;
+ rb = cv;
+ break;
+ case 4:
+ rr = X;
+ rg = m;
+ rb = cv;
+ break;
+ case 5:
+ rr = cv;
+ rg = m ;
+ rb = X;
+ break;
+ }
+ }
+ rgb[rgbOff+0] = rr;
+ rgb[rgbOff+1] = rg;
+ rgb[rgbOff+2] = rb;
+ }
+
diff --git a/jni/filters/shadows.c b/jni/filters/shadows.c
new file mode 100644
index 0000000..da3e33c
--- /dev/null
+++ b/jni/filters/shadows.c
@@ -0,0 +1,39 @@
+/*
+ * 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, jshortArray vlut)
+ {
+ char* destination = 0;
+ AndroidBitmap_lockPixels(env, bitmap, (void**) &destination);
+ unsigned char * rgb = (unsigned char * )destination;
+ int i;
+ int len = width * height * 4;
+ short* lut = (*env)->GetShortArrayElements(env, vlut,0);
+ unsigned short * hsv = (unsigned short *)malloc(3*sizeof(short));
+ for (i = 0; i < len; i+=4)
+ {
+ rgb2hsv(rgb,i,hsv,0);
+ hsv[0] = lut[hsv[0]];
+ hsv2rgb(hsv,0, rgb,i);
+ }
+
+ (*env)->ReleaseShortArrayElements(env, vlut, lut, 0);
+ free(lut);
+ AndroidBitmap_unlockPixels(env, bitmap);
+ }