| // Sample script for RGB888 support (compare to saturationARGB.rs) |
| /* |
| * Copyright (C) 2014 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. |
| */ |
| |
| #pragma version(1) |
| #pragma rs java_package_name(com.android.rs.cppbasic) |
| #pragma rs_fp_relaxed |
| |
| const static float3 gMonoMult = {0.299f, 0.587f, 0.114f}; |
| |
| // global variables (parameters accessible to application code) |
| float gSaturation = 1.0f; |
| |
| void root(const uchar3 *v_in, uchar3 *v_out) { |
| // scale 0-255 uchar to 0-1.0 float |
| float3 in = {v_in->r * 0.003921569f, v_in->g * 0.003921569f, |
| v_in->b * 0.003921569f}; |
| |
| // apply saturation filter |
| float3 result = dot(in, gMonoMult); |
| result = mix(result, in, gSaturation); |
| |
| // convert to uchar, copied from rsPackColorTo8888 |
| v_out->x = (uchar)clamp((result.r * 255.f + 0.5f), 0.f, 255.f); |
| v_out->y = (uchar)clamp((result.g * 255.f + 0.5f), 0.f, 255.f); |
| v_out->z = (uchar)clamp((result.b * 255.f + 0.5f), 0.f, 255.f); |
| } |