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 #pragma version(1) 18 #pragma rs java_package_name(com.android.rs.levels) 19 20 float inBlack; 21 float outBlack; 22 float inWMinInB; 23 float outWMinOutB; 24 float overInWMinInB; 25 float gamma; 26 rs_matrix3x3 colorMat; 27 28 void root(const uchar4 *in, uchar4 *out, uint32_t x, uint32_t y) { 29 float3 pixel = convert_float4(in[0]).rgb; 30 pixel = rsMatrixMultiply(&colorMat, pixel); 31 pixel = clamp(pixel, 0.f, 255.f); 32 pixel = (pixel - inBlack) * overInWMinInB; 33 if (gamma != 1.0f) 34 pixel = pow(pixel, (float3)gamma); 35 pixel = pixel * outWMinOutB + outBlack; 36 pixel = clamp(pixel, 0.f, 255.f); 37 out->xyz = convert_uchar3(pixel); 38 out->w = 0xff; 39 } 40 41