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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.
*/
float inBlack;
float outBlack;
float inWMinInB;
float outWMinOutB;
float overInWMinInB;
rs_matrix3x3 colorMat;
/*
uchar4 __attribute__((kernel)) root(uchar4 in) {
uchar4 out;
float3 pixel = convert_float4(in).rgb;
pixel = rsMatrixMultiply(&colorMat, pixel);
pixel = clamp(pixel, 0.f, 255.f);
pixel = (pixel - inBlack) * overInWMinInB;
pixel = pixel * outWMinOutB + outBlack;
pixel = clamp(pixel, 0.f, 255.f);
out.xyz = convert_uchar3(pixel);
out.w = 0xff;
return out;
}
*/
void initialize(float inBlack_, float outBlack_, float inWMinInB_, float outWMinOutB_,
float overInWMinInB_, rs_matrix3x3 colorMat_) {
inBlack = inBlack_;
outBlack = outBlack_;
inWMinInB = inWMinInB_;
outWMinOutB = outWMinOutB_;
overInWMinInB = overInWMinInB_;
colorMat = colorMat_;
}
float4 __attribute__((kernel)) levels_v4(float4 in) {
float4 pixel;
pixel.rgb = rsMatrixMultiply(&colorMat, in.rgb);
pixel = clamp(pixel, 0.f, 255.f);
pixel = (pixel - inBlack) * overInWMinInB;
pixel = pixel * outWMinOutB + outBlack;
return pixel;
}
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