1/*
2 * Copyright (C) 2012 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
19const static float3 gMonoMult = {0.299f, 0.587f, 0.114f};
20
21uchar4 RS_KERNEL root(uchar4 v_in) {
22    float4 f4 = rsUnpackColor8888(v_in);
23
24    float3 mono = dot(f4.rgb, gMonoMult);
25    return rsPackColorTo8888(mono);
26}
27
28uchar RS_KERNEL toU8(uchar4 v_in) {
29    float4 f4 = convert_float4(v_in);
30    return (uchar)dot(f4.rgb, gMonoMult);
31}
32
33uchar4 RS_KERNEL toU8_4(uchar v_in) {
34    return (uchar4)v_in;
35}
36
37