| /* |
| * Copyright (C) 2014 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.renderscriptintrinsic; |
| |
| import android.app.Activity; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapFactory; |
| import android.os.AsyncTask; |
| import android.os.Bundle; |
| import android.widget.CompoundButton; |
| import android.widget.CompoundButton.OnCheckedChangeListener; |
| import android.widget.ImageView; |
| import android.widget.RadioButton; |
| import android.widget.SeekBar; |
| import android.widget.SeekBar.OnSeekBarChangeListener; |
| import android.support.v8.renderscript.*; |
| |
| public class MainActivity extends Activity { |
| /* Number of bitmaps that is used for renderScript thread and UI thread synchronization. |
| Ideally, this can be reduced to 2, however in some devices, 2 buffers still showing tierings on UI. |
| Investigating a root cause. |
| */ |
| private final int NUM_BITMAPS = 3; |
| private int mCurrentBitmap = 0; |
| private Bitmap mBitmapIn; |
| private Bitmap[] mBitmapsOut; |
| private ImageView mImageView; |
| |
| private RenderScript mRS; |
| private Allocation mInAllocation; |
| private Allocation[] mOutAllocations; |
| |
| private ScriptIntrinsicBlur mScriptBlur; |
| private ScriptIntrinsicConvolve5x5 mScriptConvolve; |
| private ScriptIntrinsicColorMatrix mScriptMatrix; |
| |
| private final int MODE_BLUR = 0; |
| private final int MODE_CONVOLVE = 1; |
| private final int MODE_COLORMATRIX = 2; |
| |
| private int mFilterMode = MODE_BLUR; |
| |
| private RenderScriptTask mLatestTask = null; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| setContentView(R.layout.main_layout); |
| |
| /* |
| * Initialize UI |
| */ |
| |
| //Set up main image view |
| mBitmapIn = loadBitmap(R.drawable.data); |
| mBitmapsOut = new Bitmap[NUM_BITMAPS]; |
| for (int i = 0; i < NUM_BITMAPS; ++i) { |
| mBitmapsOut[i] = Bitmap.createBitmap(mBitmapIn.getWidth(), |
| mBitmapIn.getHeight(), mBitmapIn.getConfig()); |
| } |
| |
| mImageView = (ImageView) findViewById(R.id.imageView); |
| mImageView.setImageBitmap(mBitmapsOut[mCurrentBitmap]); |
| mCurrentBitmap += (mCurrentBitmap + 1) % NUM_BITMAPS; |
| |
| //Set up seekbar |
| final SeekBar seekbar = (SeekBar) findViewById(R.id.seekBar1); |
| seekbar.setProgress(50); |
| seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { |
| public void onProgressChanged(SeekBar seekBar, int progress, |
| boolean fromUser) { |
| updateImage(progress); |
| } |
| |
| @Override |
| public void onStartTrackingTouch(SeekBar seekBar) { |
| } |
| |
| @Override |
| public void onStopTrackingTouch(SeekBar seekBar) { |
| } |
| }); |
| |
| //Setup effect selector |
| RadioButton radio0 = (RadioButton) findViewById(R.id.radio0); |
| radio0.setOnCheckedChangeListener(new OnCheckedChangeListener() { |
| |
| @Override |
| public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { |
| if (isChecked) { |
| mFilterMode = MODE_BLUR; |
| updateImage(seekbar.getProgress()); |
| } |
| } |
| }); |
| RadioButton radio1 = (RadioButton) findViewById(R.id.radio1); |
| radio1.setOnCheckedChangeListener(new OnCheckedChangeListener() { |
| |
| @Override |
| public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { |
| if (isChecked) { |
| mFilterMode = MODE_CONVOLVE; |
| updateImage(seekbar.getProgress()); |
| } |
| } |
| }); |
| RadioButton radio2 = (RadioButton) findViewById(R.id.radio2); |
| radio2.setOnCheckedChangeListener(new OnCheckedChangeListener() { |
| |
| @Override |
| public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { |
| if (isChecked) { |
| mFilterMode = MODE_COLORMATRIX; |
| updateImage(seekbar.getProgress()); |
| } |
| } |
| }); |
| |
| /* |
| * Create renderScript |
| */ |
| createScript(); |
| |
| /* |
| * Create thumbnails |
| */ |
| createThumbnail(); |
| |
| |
| /* |
| * Invoke renderScript kernel and update imageView |
| */ |
| mFilterMode = MODE_BLUR; |
| updateImage(50); |
| } |
| |
| private void createScript() { |
| mRS = RenderScript.create(this); |
| |
| mInAllocation = Allocation.createFromBitmap(mRS, mBitmapIn); |
| |
| mOutAllocations = new Allocation[NUM_BITMAPS]; |
| for (int i = 0; i < NUM_BITMAPS; ++i) { |
| mOutAllocations[i] = Allocation.createFromBitmap(mRS, mBitmapsOut[i]); |
| } |
| |
| /* |
| Create intrinsics. |
| RenderScript has built-in features such as blur, convolve filter etc. |
| These intrinsics are handy for specific operations without writing RenderScript kernel. |
| In the sample, it's creating blur, convolve and matrix intrinsics. |
| */ |
| |
| mScriptBlur = ScriptIntrinsicBlur.create(mRS, Element.U8_4(mRS)); |
| mScriptConvolve = ScriptIntrinsicConvolve5x5.create(mRS, |
| Element.U8_4(mRS)); |
| mScriptMatrix = ScriptIntrinsicColorMatrix.create(mRS, |
| Element.U8_4(mRS)); |
| } |
| |
| private void performFilter(Allocation inAllocation, |
| Allocation outAllocation, Bitmap bitmapOut, float value) { |
| switch (mFilterMode) { |
| case MODE_BLUR: |
| /* |
| * Set blur kernel size |
| */ |
| mScriptBlur.setRadius(value); |
| |
| /* |
| * Invoke filter kernel |
| */ |
| mScriptBlur.setInput(inAllocation); |
| mScriptBlur.forEach(outAllocation); |
| break; |
| case MODE_CONVOLVE: { |
| float f1 = value; |
| float f2 = 1.0f - f1; |
| |
| // Emboss filter kernel |
| float coefficients[] = {-f1 * 2, 0, -f1, 0, 0, 0, -f2 * 2, -f2, 0, |
| 0, -f1, -f2, 1, f2, f1, 0, 0, f2, f2 * 2, 0, 0, 0, f1, 0, |
| f1 * 2,}; |
| /* |
| * Set kernel parameter |
| */ |
| mScriptConvolve.setCoefficients(coefficients); |
| |
| /* |
| * Invoke filter kernel |
| */ |
| mScriptConvolve.setInput(inAllocation); |
| mScriptConvolve.forEach(outAllocation); |
| break; |
| } |
| case MODE_COLORMATRIX: { |
| /* |
| * Set HUE rotation matrix |
| * The matrix below performs a combined operation of, |
| * RGB->HSV transform * HUE rotation * HSV->RGB transform |
| */ |
| float cos = (float) Math.cos((double) value); |
| float sin = (float) Math.sin((double) value); |
| Matrix3f mat = new Matrix3f(); |
| mat.set(0, 0, (float) (.299 + .701 * cos + .168 * sin)); |
| mat.set(1, 0, (float) (.587 - .587 * cos + .330 * sin)); |
| mat.set(2, 0, (float) (.114 - .114 * cos - .497 * sin)); |
| mat.set(0, 1, (float) (.299 - .299 * cos - .328 * sin)); |
| mat.set(1, 1, (float) (.587 + .413 * cos + .035 * sin)); |
| mat.set(2, 1, (float) (.114 - .114 * cos + .292 * sin)); |
| mat.set(0, 2, (float) (.299 - .3 * cos + 1.25 * sin)); |
| mat.set(1, 2, (float) (.587 - .588 * cos - 1.05 * sin)); |
| mat.set(2, 2, (float) (.114 + .886 * cos - .203 * sin)); |
| mScriptMatrix.setColorMatrix(mat); |
| |
| /* |
| * Invoke filter kernel |
| */ |
| mScriptMatrix.forEach(inAllocation, outAllocation); |
| } |
| break; |
| } |
| |
| /* |
| * Copy to bitmap and invalidate image view |
| */ |
| outAllocation.copyTo(bitmapOut); |
| } |
| |
| /* |
| Convert seekBar progress parameter (0-100 in range) to parameter for each intrinsic filter. |
| (e.g. 1.0-25.0 in Blur filter) |
| */ |
| private float getFilterParameter(int i) { |
| float f = 0.f; |
| switch (mFilterMode) { |
| case MODE_BLUR: { |
| final float max = 25.0f; |
| final float min = 1.f; |
| f = (float) ((max - min) * (i / 100.0) + min); |
| } |
| break; |
| case MODE_CONVOLVE: { |
| final float max = 2.f; |
| final float min = 0.f; |
| f = (float) ((max - min) * (i / 100.0) + min); |
| } |
| break; |
| case MODE_COLORMATRIX: { |
| final float max = (float) Math.PI; |
| final float min = (float) -Math.PI; |
| f = (float) ((max - min) * (i / 100.0) + min); |
| } |
| break; |
| } |
| return f; |
| |
| } |
| |
| /* |
| * In the AsyncTask, it invokes RenderScript intrinsics to do a filtering. |
| * After the filtering is done, an operation blocks at Allication.copyTo() in AsyncTask thread. |
| * Once all operation is finished at onPostExecute() in UI thread, it can invalidate and update ImageView UI. |
| */ |
| private class RenderScriptTask extends AsyncTask<Float, Integer, Integer> { |
| Boolean issued = false; |
| |
| protected Integer doInBackground(Float... values) { |
| int index = -1; |
| if (isCancelled() == false) { |
| issued = true; |
| index = mCurrentBitmap; |
| |
| performFilter(mInAllocation, mOutAllocations[index], mBitmapsOut[index], values[0]); |
| mCurrentBitmap = (mCurrentBitmap + 1) % NUM_BITMAPS; |
| } |
| return index; |
| } |
| |
| void updateView(Integer result) { |
| if (result != -1) { |
| // Request UI update |
| mImageView.setImageBitmap(mBitmapsOut[result]); |
| mImageView.invalidate(); |
| } |
| } |
| |
| protected void onPostExecute(Integer result) { |
| updateView(result); |
| } |
| |
| protected void onCancelled(Integer result) { |
| if (issued) { |
| updateView(result); |
| } |
| } |
| } |
| |
| /* |
| Invoke AsynchTask and cancel previous task. |
| When AsyncTasks are piled up (typically in slow device with heavy kernel), |
| Only the latest (and already started) task invokes RenderScript operation. |
| */ |
| private void updateImage(int progress) { |
| float f = getFilterParameter(progress); |
| |
| if (mLatestTask != null) |
| mLatestTask.cancel(false); |
| mLatestTask = new RenderScriptTask(); |
| |
| mLatestTask.execute(f); |
| } |
| |
| /* |
| Helper to load Bitmap from resource |
| */ |
| private Bitmap loadBitmap(int resource) { |
| final BitmapFactory.Options options = new BitmapFactory.Options(); |
| options.inPreferredConfig = Bitmap.Config.ARGB_8888; |
| return BitmapFactory.decodeResource(getResources(), resource, options); |
| } |
| |
| /* |
| Create thumbNail for UI. It invokes RenderScript kernel synchronously in UI-thread, |
| which is OK for small thumbnail (but not ideal). |
| */ |
| private void createThumbnail() { |
| int width = 72; |
| int height = 96; |
| float scale = getResources().getDisplayMetrics().density; |
| int pixelsWidth = (int) (width * scale + 0.5f); |
| int pixelsHeight = (int) (height * scale + 0.5f); |
| |
| //Temporary image |
| Bitmap tempBitmap = Bitmap.createScaledBitmap(mBitmapIn, pixelsWidth, pixelsHeight, false); |
| Allocation inAllocation = Allocation.createFromBitmap(mRS, tempBitmap); |
| |
| //Create thumbnail with each RS intrinsic and set it to radio buttons |
| int[] modes = {MODE_BLUR, MODE_CONVOLVE, MODE_COLORMATRIX}; |
| int[] ids = {R.id.radio0, R.id.radio1, R.id.radio2}; |
| int[] parameter = {50, 100, 25}; |
| for (int mode : modes) { |
| mFilterMode = mode; |
| float f = getFilterParameter(parameter[mode]); |
| |
| Bitmap destBitpmap = Bitmap.createBitmap(tempBitmap.getWidth(), |
| tempBitmap.getHeight(), tempBitmap.getConfig()); |
| Allocation outAllocation = Allocation.createFromBitmap(mRS, destBitpmap); |
| performFilter(inAllocation, outAllocation, destBitpmap, f); |
| |
| ThumbnailRadioButton button = (ThumbnailRadioButton) findViewById(ids[mode]); |
| button.setThumbnail(destBitpmap); |
| } |
| } |
| } |
