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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.
*/
#include "ip.rsh"
#pragma rs_fp_relaxed
rs_allocation inputImage;
float intensityLow = 0.f;
float intensityHigh;
uchar4 color;
const static float3 mono = {0.299f, 0.587f, 0.114f};
void setParams(float intensHigh, float intensLow, uchar r, uchar g, uchar b) {
intensityLow = intensLow;
intensityHigh = intensHigh;
uchar4 hats = {r, g, b, 255};
color = hats;
}
uchar4 RS_KERNEL root(uchar4 v_in, uint32_t x, uint32_t y) {
uchar4 refpix = rsGetElementAt_uchar4(inputImage, x, y);
float pixelIntensity = dot(rsUnpackColor8888(refpix).rgb, mono);
if ((pixelIntensity <= intensityHigh) && (pixelIntensity >= intensityLow)) {
return color;
} else {
return v_in;
}
}
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