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#include "ip.rsh"
18#pragma rs_fp_relaxed
19
20rs_allocation inputImage;
21
22float intensityLow = 0.f;
23float intensityHigh;
24uchar4 color;
25const static float3 mono = {0.299f, 0.587f, 0.114f};
26
27void setParams(float intensHigh, float intensLow, uchar r, uchar g, uchar b) {
28    intensityLow = intensLow;
29    intensityHigh = intensHigh;
30    uchar4 hats = {r, g, b, 255};
31    color = hats;
32}
33
34uchar4 RS_KERNEL root(uchar4 v_in, uint32_t x, uint32_t y) {
35    uchar4 refpix = rsGetElementAt_uchar4(inputImage, x, y);
36    float pixelIntensity = dot(rsUnpackColor8888(refpix).rgb, mono);
37    if ((pixelIntensity <= intensityHigh) && (pixelIntensity >= intensityLow)) {
38        return color;
39    } else {
40        return v_in;
41    }
42}
43
44
45