1572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams/* 2572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * Copyright (C) 2012 The Android Open Source Project 3572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * 4572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * Licensed under the Apache License, Version 2.0 (the "License"); 5572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * you may not use this file except in compliance with the License. 6572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * You may obtain a copy of the License at 7572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * 8572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * http://www.apache.org/licenses/LICENSE-2.0 9572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * 10572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * Unless required by applicable law or agreed to in writing, software 11572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * distributed under the License is distributed on an "AS IS" BASIS, 12572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * See the License for the specific language governing permissions and 14572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams * limitations under the License. 15572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams */ 16572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams 17572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams#include "ip.rsh" 186939f7bf32ab2765dcedb8a8d6fd352e7d08540fJason Sams#pragma rs_fp_relaxed 19572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams 20572a5031a5d8602db0bec0b253428a034bd4dd59Jason Samsstatic float brightM = 0.f; 21572a5031a5d8602db0bec0b253428a034bd4dd59Jason Samsstatic float brightC = 0.f; 22572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams 23572a5031a5d8602db0bec0b253428a034bd4dd59Jason Samsvoid setBright(float v) { 24572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams brightM = pow(2.f, v / 100.f); 25572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams brightC = 127.f - brightM * 127.f; 26572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams} 27572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams 28025b5f82971c431eb22df3c9d0f00b3cbe426bdbChris Wailesuchar4 RS_KERNEL contrast(uchar4 in) { 2923e1074f29f431f68c6b3230c1315ea0f7c7bc86Jason Sams float3 v = convert_float3(in.rgb) * brightM + brightC; 3023e1074f29f431f68c6b3230c1315ea0f7c7bc86Jason Sams uchar4 o; 3123e1074f29f431f68c6b3230c1315ea0f7c7bc86Jason Sams o.rgb = convert_uchar3(clamp(v, 0.f, 255.f)); 3223e1074f29f431f68c6b3230c1315ea0f7c7bc86Jason Sams o.a = 0xff; 3323e1074f29f431f68c6b3230c1315ea0f7c7bc86Jason Sams return o; 34572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams} 35