Render Script Demo
//
//src\com\example\android\rs\helloworld\HelloWorld.java
/*
* Copyright (C) 2011 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.
*/
package com.example.android.rs.helloworld;
import android.app.Activity;
import android.os.Bundle;
// Renderscript activity
public class HelloWorld extends Activity {
// Custom view to use with RenderScript
private HelloWorldView mView;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
// Create our view and set it as the content of our Activity
mView = new HelloWorldView(this);
setContentView(mView);
}
@Override
protected void onResume() {
// Ideally an app should implement onResume() and onPause()
// to take appropriate action when the activity loses focus
super.onResume();
mView.resume();
}
@Override
protected void onPause() {
// Ideally an app should implement onResume() and onPause()
// to take appropriate action when the activity loses focus
super.onPause();
mView.pause();
}
}
//src\com\example\android\rs\helloworld\HelloWorldRS.java
/*
* Copyright (C) 2011 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.
*/
package com.example.android.rs.helloworld;
import android.content.res.Resources;
import android.renderscript.*;
// This is the renderer for the HelloWorldView
public class HelloWorldRS {
private Resources mRes;
private RenderScriptGL mRS;
private ScriptC_helloworld mScript;
public HelloWorldRS() {
}
// This provides us with the renderscript context and resources that
// allow us to create the script that does rendering
public void init(RenderScriptGL rs, Resources res) {
mRS = rs;
mRes = res;
initRS();
}
public void onActionDown(int x, int y) {
mScript.set_gTouchX(x);
mScript.set_gTouchY(y);
}
private void initRS() {
mScript = new ScriptC_helloworld(mRS, mRes, R.raw.helloworld);
mRS.bindRootScript(mScript);
}
}
//src\com\example\android\rs\helloworld\HelloWorldView.java
/*
* Copyright (C) 2011 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.
*/
package com.example.android.rs.helloworld;
import android.renderscript.RSSurfaceView;
import android.renderscript.RenderScriptGL;
import android.content.Context;
import android.view.MotionEvent;
public class HelloWorldView extends RSSurfaceView {
// Renderscipt context
private RenderScriptGL mRS;
// Script that does the rendering
private HelloWorldRS mRender;
public HelloWorldView(Context context) {
super(context);
ensureRenderScript();
}
private void ensureRenderScript() {
if (mRS == null) {
// Initialize renderscript with desired surface characteristics.
// In this case, just use the defaults
RenderScriptGL.SurfaceConfig sc = new RenderScriptGL.SurfaceConfig();
mRS = createRenderScriptGL(sc);
// Create an instance of the script that does the rendering
mRender = new HelloWorldRS();
mRender.init(mRS, getResources());
}
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
ensureRenderScript();
}
@Override
protected void onDetachedFromWindow() {
// Handle the system event and clean up
mRender = null;
if (mRS != null) {
mRS = null;
destroyRenderScriptGL();
}
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
// Pass touch events from the system to the rendering script
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
mRender.onActionDown((int)ev.getX(), (int)ev.getY());
return true;
}
return false;
}
}
//src\com\example\android\rs\helloworld\helloworld.rs
// Copyright (C) 2011 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)
// Tell which java package name the reflected files should belong to
#pragma rs java_package_name(com.example.android.rs.helloworld)
// Built-in header with graphics API's
#include "rs_graphics.rsh"
// gTouchX and gTouchY are variables that will be reflected for use
// by the java API. We can use them to notify the script of touch events.
int gTouchX;
int gTouchY;
// This is invoked automatically when the script is created
void init() {
gTouchX = 50.0f;
gTouchY = 50.0f;
}
int root(int launchID) {
// Clear the background color
rsgClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// Tell the runtime what the font color should be
rsgFontColor(1.0f, 1.0f, 1.0f, 1.0f);
// Introuduce ourselves to the world by drawing a greeting
// at the position user touched on the screen
rsgDrawText("Hello World!", gTouchX, gTouchY);
// Return value tells RS roughly how often to redraw
// in this case 20 ms
return 20;
}
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