2 * Copyright (C) 2012 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 void JNIFUNCF(ImageFilterSaturated, nativeApplyFilter, jobject bitmap, jint width, jint height, jfloat saturation)
21 char* destination = 0;
22 AndroidBitmap_lockPixels(env, bitmap, (void**) &destination);
24 int len = width * height * 4;
28 float S = saturation;;
34 for (i = 0; i < len; i+=4)
36 int r = destination[RED];
37 int g = destination[GREEN];
38 int b = destination[BLUE];
44 float Rc = R * (Rt + S) + G * Gt + B * Bt;
45 float Gc = R * Rt + G * (Gt + S) + B * Bt;
46 float Bc = R * Rt + G * Gt + B * (Bt + S);
48 destination[RED] = CLAMP(Rc);
49 destination[GREEN] = CLAMP(Gc);
50 destination[BLUE] = CLAMP(Bc);
52 AndroidBitmap_unlockPixels(env, bitmap);