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 #pragma rs_fp_relaxed 19 20 const static float3 gMonoMult = {0.299f, 0.587f, 0.114f}; 21 22 uchar4 RS_KERNEL root(uchar4 v_in) { 23 float4 f4 = rsUnpackColor8888(v_in); 24 25 float3 mono = dot(f4.rgb, gMonoMult); 26 return rsPackColorTo8888(mono); 27 } 28 29 uchar RS_KERNEL toU8(uchar4 v_in) { 30 float4 f4 = convert_float4(v_in); 31 return (uchar)dot(f4.rgb, gMonoMult); 32 } 33 34 uchar4 RS_KERNEL toU8_4(uchar v_in) { 35 return (uchar4)v_in; 36 } 37 38
