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 static float bright = 0.f; 21 22 void setBright(float v) { 23 bright = 255.f / (255.f - v); 24 } 25 26 uchar4 RS_KERNEL exposure(uchar4 in) 27 { 28 uchar4 out = 0; 29 out.r = rsClamp((int)(bright * in.r), 0, 255); 30 out.g = rsClamp((int)(bright * in.g), 0, 255); 31 out.b = rsClamp((int)(bright * in.b), 0, 255); 32 return out; 33 } 34 35
