README.md
1
2Android BasicRenderScript Sample
3===================================
4
5This sample demonstrates using RenderScript to perform basic image manipulation. Specifically, it allows users
6to dynamically adjust the saturation for an image using a slider. A custom RenderScript kernel performs the saturation
7adjustment, running the computation on the device\'s GPU or other compute hardware as deemed appropriate by the system.
8
9Introduction
10------------
11
12[RenderScript][1] is a framework for running computationally intensive tasks at high performance on Android. RenderScript is
13primarily oriented for use with data-parallel computation, although serial computationally intensive workloads can
14benefit as well.
15
16The RenderScript runtime will parallelize work across all processors available on a device, such as multi-core CPUs,
17GPUs, or DSPs, allowing you to focus on expressing algorithms rather than scheduling work or load balancing.
18RenderScript is especially useful for applications performing image processing, computational photography, or computer
19vision.
20
21This sample demonstrates the fundamentals of writing a RenderScript compute kernel, and using it to perform basic image
22manipulation. In this case, each pixel is transformed based on a liner interpolation between its original
23RGB 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
28Pre-requisites
29--------------
30
31- Android SDK 28
32- Android Build Tools v28.0.3
33- Android Support Repository
34
35Screenshots
36-------------
37
38<img src="screenshots/main.png" height="400" alt="Screenshot"/>
39
40Getting Started
41---------------
42
43This sample uses the Gradle build system. To build this project, use the
44"gradlew build" command or use "Import Project" in Android Studio.
45
46Support
47-------
48
49- Google+ Community: https://plus.google.com/communities/105153134372062985968
50- Stack Overflow: http://stackoverflow.com/questions/tagged/android
51
52If you've found an error in this sample, please file an issue:
53https://github.com/googlesamples/android-BasicRenderScript
54
55Patches are encouraged, and may be submitted by forking this project and
56submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
57
58License
59-------
60
61Copyright 2019 The Android Open Source Project, Inc.
62
63Licensed to the Apache Software Foundation (ASF) under one or more contributor
64license agreements. See the NOTICE file distributed with this work for
65additional information regarding copyright ownership. The ASF licenses this
66file to you under the Apache License, Version 2.0 (the "License"); you may not
67use this file except in compliance with the License. You may obtain a copy of
68the License at
69
70http://www.apache.org/licenses/LICENSE-2.0
71
72Unless required by applicable law or agreed to in writing, software
73distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
74WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
75License for the specific language governing permissions and limitations under
76the License.
77
