1 // Sample script for RGB888 support (compare to saturationARGB.rs) 2 /* 3 * Copyright (C) 2014 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 #pragma version(1) 19 #pragma rs java_package_name(com.android.rs.cppbasic) 20 #pragma rs_fp_relaxed 21 22 const static float3 gMonoMult = {0.299f, 0.587f, 0.114f}; 23 24 // global variables (parameters accessible to application code) 25 float gSaturation = 1.0f; 26 27 void root(const uchar3 *v_in, uchar3 *v_out) { 28 // scale 0-255 uchar to 0-1.0 float 29 float3 in = {v_in->r * 0.003921569f, v_in->g * 0.003921569f, 30 v_in->b * 0.003921569f}; 31 32 // apply saturation filter 33 float3 result = dot(in, gMonoMult); 34 result = mix(result, in, gSaturation); 35 36 // convert to uchar, copied from rsPackColorTo8888 37 v_out->x = (uchar)clamp((result.r * 255.f + 0.5f), 0.f, 255.f); 38 v_out->y = (uchar)clamp((result.g * 255.f + 0.5f), 0.f, 255.f); 39 v_out->z = (uchar)clamp((result.b * 255.f + 0.5f), 0.f, 255.f); 40 } 41
