77 lines
3.2 KiB
Markdown
77 lines
3.2 KiB
Markdown
|
|
Android BasicRenderScript Sample
|
|
===================================
|
|
|
|
This sample demonstrates using RenderScript to perform basic image manipulation. Specifically, it allows users
|
|
to dynamically adjust the saturation for an image using a slider. A custom RenderScript kernel performs the saturation
|
|
adjustment, running the computation on the device\'s GPU or other compute hardware as deemed appropriate by the system.
|
|
|
|
Introduction
|
|
------------
|
|
|
|
[RenderScript][1] is a framework for running computationally intensive tasks at high performance on Android. RenderScript is
|
|
primarily oriented for use with data-parallel computation, although serial computationally intensive workloads can
|
|
benefit as well.
|
|
|
|
The RenderScript runtime will parallelize work across all processors available on a device, such as multi-core CPUs,
|
|
GPUs, or DSPs, allowing you to focus on expressing algorithms rather than scheduling work or load balancing.
|
|
RenderScript is especially useful for applications performing image processing, computational photography, or computer
|
|
vision.
|
|
|
|
This sample demonstrates the fundamentals of writing a RenderScript compute kernel, and using it to perform basic image
|
|
manipulation. In this case, each pixel is transformed based on a liner interpolation between its original
|
|
RGB value and it's luminance (black-and-white) value, weighted based on the user's specified saturation target.
|
|
|
|
[1]: http://developer.android.com/guide/topics/renderscript/compute.html
|
|
[2]: http://developer.android.com/reference/renderscript/rs__cl_8rsh.html#a254612a612ff7539b01a1478e03d8697
|
|
|
|
Pre-requisites
|
|
--------------
|
|
|
|
- Android SDK 27
|
|
- Android Build Tools v27.0.2
|
|
- Android Support Repository
|
|
|
|
Screenshots
|
|
-------------
|
|
|
|
<img src="screenshots/main.png" height="400" alt="Screenshot"/>
|
|
|
|
Getting Started
|
|
---------------
|
|
|
|
This sample uses the Gradle build system. To build this project, use the
|
|
"gradlew build" command or use "Import Project" in Android Studio.
|
|
|
|
Support
|
|
-------
|
|
|
|
- Google+ Community: https://plus.google.com/communities/105153134372062985968
|
|
- Stack Overflow: http://stackoverflow.com/questions/tagged/android
|
|
|
|
If you've found an error in this sample, please file an issue:
|
|
https://github.com/googlesamples/android-BasicRenderScript
|
|
|
|
Patches are encouraged, and may be submitted by forking this project and
|
|
submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
|
|
|
|
License
|
|
-------
|
|
|
|
Copyright 2017 The Android Open Source Project, Inc.
|
|
|
|
Licensed to the Apache Software Foundation (ASF) under one or more contributor
|
|
license agreements. See the NOTICE file distributed with this work for
|
|
additional information regarding copyright ownership. The ASF licenses this
|
|
file to you 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.
|