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" 186a804605b99cab4ffa3cc55c691338fd4a5396eaJason Sams#pragma rs_fp_relaxed 19572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams 20572a5031a5d8602db0bec0b253428a034bd4dd59Jason Samsstatic float sr = 0.f; 21572a5031a5d8602db0bec0b253428a034bd4dd59Jason Samsstatic float sg = 0.f; 22572a5031a5d8602db0bec0b253428a034bd4dd59Jason Samsstatic float sb = 0.f; 23572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams 24572a5031a5d8602db0bec0b253428a034bd4dd59Jason Samsvoid prepareBwFilter(uint32_t rw, uint32_t gw, uint32_t bw) { 25572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams 26572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams sr = rw; 27572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams sg = gw; 28572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams sb = bw; 29572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams 30572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams float imageMin = min(sg,sb); 31572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams imageMin = fmin(sr,imageMin); 32572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams float imageMax = max(sg,sb); 33572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams imageMax = fmax(sr,imageMax); 34572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams float avg = (imageMin + imageMax)/2; 35572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams sb /= avg; 36572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams sg /= avg; 37572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams sr /= avg; 38572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams 39572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams} 40572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams 41572a5031a5d8602db0bec0b253428a034bd4dd59Jason Samsvoid bwFilterKernel(const uchar4 *in, uchar4 *out) { 42572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams float r = in->r * sr; 43572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams float g = in->g * sg; 44572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams float b = in->b * sb; 45572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams float localMin, localMax, avg; 46572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams localMin = fmin(g,b); 47572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams localMin = fmin(r,localMin); 48572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams localMax = fmax(g,b); 49572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams localMax = fmax(r,localMax); 50572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams avg = (localMin+localMax) * 0.5f; 51572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams out->r = out->g = out->b = rsClamp(avg, 0, 255); 52572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams} 53