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README.md
1 Android BasicRenderScript Sample 2 =================================== 3 4 This sample demonstrates using RenderScript to perform basic image manipulation. Specifically, it allows users 5 to dynamically adjust the saturation for an image using a slider. A custom RenderScript kernel performs the saturation 6 adjustment, running the computation on the device's GPU or other compute hardware as deemed appropriate by the system. 7 8 Introduction 9 ------------ 10 11 [RenderScript][1] is a framework for running computationally intensive tasks at high performance on Android. RenderScript is 12 primarily oriented for use with data-parallel computation, although serial computationally intensive workloads can 13 benefit as well. 14 15 The RenderScript runtime will parallelize work across all processors available on a device, such as multi-core CPUs, 16 GPUs, or DSPs, allowing you to focus on expressing algorithms rather than scheduling work or load balancing. 17 RenderScript is especially useful for applications performing image processing, computational photography, or computer 18 vision. 19 20 This sample demonstrates the fundamentals of writing a RenderScript compute kernel, and using it to perform basic image 21 manipulation. In this case, each pixel is transformed based on a liner interpolation between its original 22 RGB value and it's luminance (black-and-white) value, weighted based on the user's specified saturation target. 23 24 [1]: http://developer.android.com/guide/topics/renderscript/compute.html 25 [2]: http://developer.android.com/reference/renderscript/rs__cl_8rsh.html#a254612a612ff7539b01a1478e03d8697 26 27 Pre-requisites 28 -------------- 29 30 - Android SDK v21 31 - Android Build Tools v21.1.1 32 - Android Support Repository 33 34 Screenshots 35 ------------- 36 37 <img src="screenshots/main.png" height="400" alt="Screenshot"/> 38 39 Getting Started 40 --------------- 41 42 This sample uses the Gradle build system. To build this project, use the 43 "gradlew build" command or use "Import Project" in Android Studio. 44 45 Support 46 ------- 47 48 - Google+ Community: https://plus.google.com/communities/105153134372062985968 49 - Stack Overflow: http://stackoverflow.com/questions/tagged/android 50 51 If you've found an error in this sample, please file an issue: 52 https://github.com/googlesamples/android-BasicRenderScript 53 54 Patches are encouraged, and may be submitted by forking this project and 55 submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details. 56 57 License 58 ------- 59 60 Copyright 2014 The Android Open Source Project, Inc. 61 62 Licensed to the Apache Software Foundation (ASF) under one or more contributor 63 license agreements. See the NOTICE file distributed with this work for 64 additional information regarding copyright ownership. The ASF licenses this 65 file to you under the Apache License, Version 2.0 (the "License"); you may not 66 use this file except in compliance with the License. You may obtain a copy of 67 the License at 68 69 http://www.apache.org/licenses/LICENSE-2.0 70 71 Unless required by applicable law or agreed to in writing, software 72 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 73 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 74 License for the specific language governing permissions and limitations under 75 the License. 76
