The file containing the source code shown below is located in the corresponding directory in <sdk>/samples/android-<version>/...
/*
* Copyright (C) 2012 The Android开源工程
*
* 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.android.rs.levels;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.os.Bundle;
import android.graphics.SurfaceTexture;
import android.renderscript.Allocation;
import android.renderscript.Matrix3f;
import android.renderscript.RenderScript;
import android.util.Log;
import android.view.TextureView;
import android.view.View;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.TextView;
public class LevelsRSActivity extends Activity
implements SeekBar.OnSeekBarChangeListener,
TextureView.SurfaceTextureListener
{
private final String TAG = "Img";
private Bitmap mBitmapIn;
private float mInBlack = 0.0f;
private SeekBar mInBlackSeekBar;
private float mOutBlack = 0.0f;
private SeekBar mOutBlackSeekBar;
private float mInWhite = 255.0f;
private SeekBar mInWhiteSeekBar;
private float mOutWhite = 255.0f;
private SeekBar mOutWhiteSeekBar;
private float mGamma = 1.0f;
private SeekBar mGammaSeekBar;
private float mSaturation = 1.0f;
private SeekBar mSaturationSeekBar;
private TextView mBenchmarkResult;
private TextureView mDisplayView;
Matrix3f satMatrix = new Matrix3f();
float mInWMinInB;
float mOutWMinOutB;
float mOverInWMinInB;
private RenderScript mRS;
private Allocation mInPixelsAllocation;
private Allocation mOutPixelsAllocation;
private ScriptC_levels mScript;
private void setLevels() {
mInWMinInB = mInWhite - mInBlack;
mOutWMinOutB = mOutWhite - mOutBlack;
mOverInWMinInB = 1.f / mInWMinInB;
mScript.set_inBlack(mInBlack);
mScript.set_outBlack(mOutBlack);
mScript.set_inWMinInB(mInWMinInB);
mScript.set_outWMinOutB(mOutWMinOutB);
mScript.set_overInWMinInB(mOverInWMinInB);
}
private void setSaturation() {
float rWeight = 0.299f;
float gWeight = 0.587f;
float bWeight = 0.114f;
float oneMinusS = 1.0f - mSaturation;
satMatrix.set(0, 0, oneMinusS * rWeight + mSaturation);
satMatrix.set(0, 1, oneMinusS * rWeight);
satMatrix.set(0, 2, oneMinusS * rWeight);
satMatrix.set(1, 0, oneMinusS * gWeight);
satMatrix.set(1, 1, oneMinusS * gWeight + mSaturation);
satMatrix.set(1, 2, oneMinusS * gWeight);
satMatrix.set(2, 0, oneMinusS * bWeight);
satMatrix.set(2, 1, oneMinusS * bWeight);
satMatrix.set(2, 2, oneMinusS * bWeight + mSaturation);
mScript.set_colorMat(satMatrix);
}
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if (fromUser) {
if (seekBar == mInBlackSeekBar) {
mInBlack = (float)progress;
setLevels();
} else if (seekBar == mOutBlackSeekBar) {
mOutBlack = (float)progress;
setLevels();
} else if (seekBar == mInWhiteSeekBar) {
mInWhite = (float)progress + 127.0f;
setLevels();
} else if (seekBar == mOutWhiteSeekBar) {
mOutWhite = (float)progress + 127.0f;
setLevels();
} else if (seekBar == mGammaSeekBar) {
mGamma = (float)progress/100.0f;
mGamma = Math.max(mGamma, 0.1f);
mGamma = 1.0f / mGamma;
mScript.set_gamma(mGamma);
} else if (seekBar == mSaturationSeekBar) {
mSaturation = (float)progress / 50.0f;
setSaturation();
}
filter();
mDisplayView.invalidate();
}
}
public void onStartTrackingTouch(SeekBar seekBar) {
}
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.rs);
mBitmapIn = loadBitmap(R.drawable.city);
mDisplayView = (TextureView) findViewById(R.id.display);
mInBlackSeekBar = (SeekBar)findViewById(R.id.inBlack);
mInBlackSeekBar.setOnSeekBarChangeListener(this);
mInBlackSeekBar.setMax(128);
mInBlackSeekBar.setProgress(0);
mOutBlackSeekBar = (SeekBar)findViewById(R.id.outBlack);
mOutBlackSeekBar.setOnSeekBarChangeListener(this);
mOutBlackSeekBar.setMax(128);
mOutBlackSeekBar.setProgress(0);
mInWhiteSeekBar = (SeekBar)findViewById(R.id.inWhite);
mInWhiteSeekBar.setOnSeekBarChangeListener(this);
mInWhiteSeekBar.setMax(128);
mInWhiteSeekBar.setProgress(128);
mOutWhiteSeekBar = (SeekBar)findViewById(R.id.outWhite);
mOutWhiteSeekBar.setOnSeekBarChangeListener(this);
mOutWhiteSeekBar.setMax(128);
mOutWhiteSeekBar.setProgress(128);
mGammaSeekBar = (SeekBar)findViewById(R.id.inGamma);
mGammaSeekBar.setOnSeekBarChangeListener(this);
mGammaSeekBar.setMax(150);
mGammaSeekBar.setProgress(100);
mSaturationSeekBar = (SeekBar)findViewById(R.id.inSaturation);
mSaturationSeekBar.setOnSeekBarChangeListener(this);
mSaturationSeekBar.setProgress(50);
mBenchmarkResult = (TextView) findViewById(R.id.benchmarkText);
mBenchmarkResult.setText("Result: not run");
mRS = RenderScript.create(this);
mInPixelsAllocation = Allocation.createFromBitmap(mRS, mBitmapIn,
Allocation.MipmapControl.MIPMAP_NONE,
Allocation.USAGE_SCRIPT);
mOutPixelsAllocation = Allocation.createTyped(mRS, mInPixelsAllocation.getType(),
Allocation.USAGE_SCRIPT |
Allocation.USAGE_IO_OUTPUT);
mDisplayView.setSurfaceTextureListener(this);
mScript = new ScriptC_levels(mRS, getResources(), R.raw.levels);
mScript.set_gamma(mGamma);
setSaturation();
setLevels();
}
private Bitmap loadBitmap(int resource) {
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap b = BitmapFactory.decodeResource(getResources(), resource, options);
Bitmap b2 = Bitmap.createBitmap(b.getWidth(), b.getHeight(), b.getConfig());
Canvas c = new Canvas(b2);
c.drawBitmap(b, 0, 0, null);
b.recycle();
return b2;
}
private void filter() {
mScript.forEach_root(mInPixelsAllocation, mOutPixelsAllocation);
mOutPixelsAllocation.ioSendOutput();
mRS.finish();
}
public void benchmark(View v) {
filter();
long t = java.lang.System.currentTimeMillis();
filter();
t = java.lang.System.currentTimeMillis() - t;
mDisplayView.invalidate();
mBenchmarkResult.setText("Result: " + t + " ms");
}
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
mOutPixelsAllocation.setSurfaceTexture(surface);
filter();
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
mOutPixelsAllocation.setSurfaceTexture(surface);
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
mOutPixelsAllocation.setSurfaceTexture(null);
return true;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
}