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README.md
1 2 Android BasicRenderScript Sample 3 =================================== 4 5 This sample demonstrates using RenderScript to perform basic image manipulation. Specifically, it allows users 6 to dynamically adjust the saturation for an image using a slider. A custom RenderScript kernel performs the saturation 7 adjustment, running the computation on the device\'s GPU or other compute hardware as deemed appropriate by the system. 8 9 Introduction 10 ------------ 11 12 [RenderScript][1] is a framework for running computationally intensive tasks at high performance on Android. RenderScript is 13 primarily oriented for use with data-parallel computation, although serial computationally intensive workloads can 14 benefit as well. 15 16 The RenderScript runtime will parallelize work across all processors available on a device, such as multi-core CPUs, 17 GPUs, or DSPs, allowing you to focus on expressing algorithms rather than scheduling work or load balancing. 18 RenderScript is especially useful for applications performing image processing, computational photography, or computer 19 vision. 20 21 This sample demonstrates the fundamentals of writing a RenderScript compute kernel, and using it to perform basic image 22 manipulation. In this case, each pixel is transformed based on a liner interpolation between its original 23 RGB value and it's luminance (black-and-white) value, weighted based on the user's specified saturation target. 24 25 [1]: http://developer.android.com/guide/topics/renderscript/compute.html 26 [2]: http://developer.android.com/reference/renderscript/rs__cl_8rsh.html#a254612a612ff7539b01a1478e03d8697 27 28 Pre-requisites 29 -------------- 30 31 - Android SDK 25 32 - Android Build Tools v25.0.3 33 - Android Support Repository 34 35 Screenshots 36 ------------- 37 38 <img src="screenshots/main.png" height="400" alt="Screenshot"/> 39 40 Getting Started 41 --------------- 42 43 This sample uses the Gradle build system. To build this project, use the 44 "gradlew build" command or use "Import Project" in Android Studio. 45 46 Support 47 ------- 48 49 - Google+ Community: https://plus.google.com/communities/105153134372062985968 50 - Stack Overflow: http://stackoverflow.com/questions/tagged/android 51 52 If you've found an error in this sample, please file an issue: 53 https://github.com/googlesamples/android-BasicRenderScript 54 55 Patches are encouraged, and may be submitted by forking this project and 56 submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details. 57 58 License 59 ------- 60 61 Copyright 2017 The Android Open Source Project, Inc. 62 63 Licensed to the Apache Software Foundation (ASF) under one or more contributor 64 license agreements. See the NOTICE file distributed with this work for 65 additional information regarding copyright ownership. The ASF licenses this 66 file to you under the Apache License, Version 2.0 (the "License"); you may not 67 use this file except in compliance with the License. You may obtain a copy of 68 the License at 69 70 http://www.apache.org/licenses/LICENSE-2.0 71 72 Unless required by applicable law or agreed to in writing, software 73 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 74 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 75 License for the specific language governing permissions and limitations under 76 the License. 77
