1/* 2 * Copyright (C) 2013 Unknown 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.gallery3d.filtershow.filters) 19 20uint32_t inputWidth; 21uint32_t inputHeight; 22float centerx; 23float centery; 24float radiusx; 25float radiusy; 26float strength; 27float finalBright; 28float finalSaturation; 29float finalContrast; 30float finalSubtract; 31rs_matrix3x3 colorMatrix; 32float scalex; 33float scaley; 34float offset; 35static const float Rf = 0.2999f; 36static const float Gf = 0.587f; 37static const float Bf = 0.114f; 38 39 40void setupVignetteParams() { 41 scalex = 1.f / radiusx; 42 scaley = 1.f / radiusy; 43 44 float S = 1 + finalSaturation / 100.f; 45 float MS = 1 - S; 46 float Rt = Rf * MS; 47 float Gt = Gf * MS; 48 float Bt = Bf * MS; 49 50 float b = 1 + finalBright / 100.f; 51 float c = 1 + finalContrast / 100.f; 52 b *= c; 53 offset = .5f - c / 2.f - finalSubtract / 100.f; 54 rsMatrixSet(&colorMatrix, 0, 0, b * (Rt + S)); 55 rsMatrixSet(&colorMatrix, 1, 0, b * Gt); 56 rsMatrixSet(&colorMatrix, 2, 0, b * Bt); 57 rsMatrixSet(&colorMatrix, 0, 1, b * Rt); 58 rsMatrixSet(&colorMatrix, 1, 1, b * (Gt + S)); 59 rsMatrixSet(&colorMatrix, 2, 1, b * Bt); 60 rsMatrixSet(&colorMatrix, 0, 2, b * Rt); 61 rsMatrixSet(&colorMatrix, 1, 2, b * Gt); 62 rsMatrixSet(&colorMatrix, 2, 2, b * (Bt + S)); 63} 64 65uchar4 __attribute__((kernel)) vignette(const uchar4 in, uint32_t x, uint32_t y) { 66 float4 pixel = rsUnpackColor8888(in); 67 float radx = (x - centerx) * scalex; 68 float rady = (y - centery) * scaley; 69 float dist = strength * (sqrt(radx * radx + rady * rady) - 1.f); 70 float t = (1.f + dist / sqrt(1.f + dist* dist)) * .5f; 71 float4 wsum = pixel; 72 wsum.xyz = wsum.xyz * (1 - t) + t * (rsMatrixMultiply(&colorMatrix, wsum.xyz) + offset); 73 wsum.a = 1.0f; 74 uchar4 out = rsPackColorTo8888(clamp(wsum, 0.f, 1.0f)); 75 return out; 76} 77