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/**
* 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.
*/
#pragma version(1)
#pragma rs java_package_name(com.example.android.iogallery)
#pragma rs_fp_relaxed(relaxed)
const static float4 convertIntensity = { 0.299f, 0.587f, 0.114f, 0.f };
float4 darkColor;
float4 lightColor;
float strength;
void root(const uchar4 *inPixel, uchar4 *outPixel) {
float4 inColor = convert_float4(*inPixel);
// Mix between two color tones based on intensity
float intensity = dot(convertIntensity, inColor) / 255.f;
float4 tonedColor = mix(darkColor, lightColor, intensity);
tonedColor = tonedColor * intensity;
// Blend toned and original colors
float4 outColor = mix(inColor, tonedColor, strength);
*outPixel = convert_uchar4(outColor);
}