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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ip.rsh"
#pragma rs_fp_relaxed
static float bright = 0.f;
void setBright(float v) {
bright = 255.f / (255.f - v);
}
uchar4 RS_KERNEL exposure(uchar4 in)
{
uchar4 out = {0, 0, 0, 255};
float3 t = convert_float3(in.rgb);
out.rgb = convert_uchar3(clamp(convert_int3(t * bright), 0, 255));
return out;
}
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