1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 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 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 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. 15 */ 16 17 #pragma version(1) 18 #pragma rs java_package_name(com.example.android.basicrenderscript) 19 #pragma rs_fp_relaxed 20 21 const static float3 gMonoMult = {0.299f, 0.587f, 0.114f}; 22 23 float saturationValue = 0.f; 24 25 /* 26 RenderScript kernel that performs saturation manipulation. 27 */ 28 uchar4 __attribute__((kernel)) saturation(uchar4 in) 29 { 30 float4 f4 = rsUnpackColor8888(in); 31 float3 result = dot(f4.rgb, gMonoMult); 32 result = mix( result, f4.rgb, saturationValue ); 33 34 return rsPackColorTo8888(result); 35 } 36 37
