1/*
2 * Copyright (C) 2013 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#pragma version(1)
18#pragma rs java_package_name(com.example.android.rs.hellocomputendk)
19
20const static float3 gMonoMult = {0.299f, 0.587f, 0.114f};
21
22void root(const uchar4 *v_in, uchar4 *v_out) {
23    float4 f4 = rsUnpackColor8888(*v_in);
24
25    float3 mono = dot(f4.rgb, gMonoMult);
26    *v_out = rsPackColorTo8888(mono);
27}
28
29