| /* |
| * Copyright (C) 2014 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. |
| */ |
| |
| #pragma version(1) |
| #pragma rs java_package_name(com.example.android.basicrenderscript) |
| #pragma rs_fp_relaxed |
| |
| const static float3 gMonoMult = {0.299f, 0.587f, 0.114f}; |
| |
| float saturationValue = 0.f; |
| |
| /* |
| RenderScript kernel that performs saturation manipulation. |
| */ |
| uchar4 __attribute__((kernel)) saturation(uchar4 in) |
| { |
| float4 f4 = rsUnpackColor8888(in); |
| float3 result = dot(f4.rgb, gMonoMult); |
| result = mix( result, f4.rgb, saturationValue ); |
| |
| return rsPackColorTo8888(result); |
| } |
| |