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 20static float bright = 0.f; 21 22void setBright(float v) { 23 bright = 255.f / (255.f - v); 24} 25 26uchar4 RS_KERNEL exposure(uchar4 in) 27{ 28 uchar4 out = {0, 0, 0, 255}; 29 float3 t = convert_float3(in.rgb); 30 out.rgb = convert_uchar3(clamp(convert_int3(t * bright), 0, 255)); 31 return out; 32} 33 34