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 bright = 0.f;
21572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams
22572a5031a5d8602db0bec0b253428a034bd4dd59Jason Samsvoid setBright(float v) {
23572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams    bright = 255.f / (255.f - v);
24572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams}
25572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams
266a804605b99cab4ffa3cc55c691338fd4a5396eaJason Samsuchar4 RS_KERNEL exposure(uchar4 in)
27572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams{
286a804605b99cab4ffa3cc55c691338fd4a5396eaJason Sams    uchar4 out = 0;
296a804605b99cab4ffa3cc55c691338fd4a5396eaJason Sams    out.r = rsClamp((int)(bright * in.r), 0, 255);
306a804605b99cab4ffa3cc55c691338fd4a5396eaJason Sams    out.g = rsClamp((int)(bright * in.g), 0, 255);
316a804605b99cab4ffa3cc55c691338fd4a5396eaJason Sams    out.b = rsClamp((int)(bright * in.b), 0, 255);
326a804605b99cab4ffa3cc55c691338fd4a5396eaJason Sams    return out;
33572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams}
34572a5031a5d8602db0bec0b253428a034bd4dd59Jason Sams
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