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/*
* 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);
}
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