Alexander Lucas | 0b3758e | 2014-02-06 15:38:51 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.example.android.renderscriptintrinsic; |
| 18 | |
| 19 | import android.app.Activity; |
| 20 | import android.graphics.Bitmap; |
| 21 | import android.graphics.BitmapFactory; |
| 22 | import android.os.AsyncTask; |
| 23 | import android.os.Bundle; |
| 24 | import android.widget.CompoundButton; |
| 25 | import android.widget.CompoundButton.OnCheckedChangeListener; |
| 26 | import android.widget.ImageView; |
| 27 | import android.widget.RadioButton; |
| 28 | import android.widget.SeekBar; |
| 29 | import android.widget.SeekBar.OnSeekBarChangeListener; |
| 30 | import android.support.v8.renderscript.*; |
| 31 | |
| 32 | public class MainActivity extends Activity { |
| 33 | /* Number of bitmaps that is used for renderScript thread and UI thread synchronization. |
| 34 | Ideally, this can be reduced to 2, however in some devices, 2 buffers still showing tierings on UI. |
| 35 | Investigating a root cause. |
| 36 | */ |
| 37 | private final int NUM_BITMAPS = 3; |
| 38 | private int mCurrentBitmap = 0; |
| 39 | private Bitmap mBitmapIn; |
| 40 | private Bitmap[] mBitmapsOut; |
| 41 | private ImageView mImageView; |
| 42 | |
| 43 | private RenderScript mRS; |
| 44 | private Allocation mInAllocation; |
| 45 | private Allocation[] mOutAllocations; |
| 46 | |
| 47 | private ScriptIntrinsicBlur mScriptBlur; |
| 48 | private ScriptIntrinsicConvolve5x5 mScriptConvolve; |
| 49 | private ScriptIntrinsicColorMatrix mScriptMatrix; |
| 50 | |
| 51 | private final int MODE_BLUR = 0; |
| 52 | private final int MODE_CONVOLVE = 1; |
| 53 | private final int MODE_COLORMATRIX = 2; |
| 54 | |
| 55 | private int mFilterMode = MODE_BLUR; |
| 56 | |
| 57 | private RenderScriptTask mLatestTask = null; |
| 58 | |
| 59 | @Override |
| 60 | protected void onCreate(Bundle savedInstanceState) { |
| 61 | super.onCreate(savedInstanceState); |
| 62 | |
| 63 | setContentView(R.layout.main_layout); |
| 64 | |
| 65 | /* |
| 66 | * Initialize UI |
| 67 | */ |
| 68 | |
| 69 | //Set up main image view |
| 70 | mBitmapIn = loadBitmap(R.drawable.data); |
| 71 | mBitmapsOut = new Bitmap[NUM_BITMAPS]; |
| 72 | for (int i = 0; i < NUM_BITMAPS; ++i) { |
| 73 | mBitmapsOut[i] = Bitmap.createBitmap(mBitmapIn.getWidth(), |
| 74 | mBitmapIn.getHeight(), mBitmapIn.getConfig()); |
| 75 | } |
| 76 | |
| 77 | mImageView = (ImageView) findViewById(R.id.imageView); |
| 78 | mImageView.setImageBitmap(mBitmapsOut[mCurrentBitmap]); |
| 79 | mCurrentBitmap += (mCurrentBitmap + 1) % NUM_BITMAPS; |
| 80 | |
| 81 | //Set up seekbar |
| 82 | final SeekBar seekbar = (SeekBar) findViewById(R.id.seekBar1); |
| 83 | seekbar.setProgress(50); |
| 84 | seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { |
| 85 | public void onProgressChanged(SeekBar seekBar, int progress, |
| 86 | boolean fromUser) { |
| 87 | updateImage(progress); |
| 88 | } |
| 89 | |
| 90 | @Override |
| 91 | public void onStartTrackingTouch(SeekBar seekBar) { |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | public void onStopTrackingTouch(SeekBar seekBar) { |
| 96 | } |
| 97 | }); |
| 98 | |
| 99 | //Setup effect selector |
| 100 | RadioButton radio0 = (RadioButton) findViewById(R.id.radio0); |
| 101 | radio0.setOnCheckedChangeListener(new OnCheckedChangeListener() { |
| 102 | |
| 103 | @Override |
| 104 | public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { |
| 105 | if (isChecked) { |
| 106 | mFilterMode = MODE_BLUR; |
| 107 | updateImage(seekbar.getProgress()); |
| 108 | } |
| 109 | } |
| 110 | }); |
| 111 | RadioButton radio1 = (RadioButton) findViewById(R.id.radio1); |
| 112 | radio1.setOnCheckedChangeListener(new OnCheckedChangeListener() { |
| 113 | |
| 114 | @Override |
| 115 | public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { |
| 116 | if (isChecked) { |
| 117 | mFilterMode = MODE_CONVOLVE; |
| 118 | updateImage(seekbar.getProgress()); |
| 119 | } |
| 120 | } |
| 121 | }); |
| 122 | RadioButton radio2 = (RadioButton) findViewById(R.id.radio2); |
| 123 | radio2.setOnCheckedChangeListener(new OnCheckedChangeListener() { |
| 124 | |
| 125 | @Override |
| 126 | public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { |
| 127 | if (isChecked) { |
| 128 | mFilterMode = MODE_COLORMATRIX; |
| 129 | updateImage(seekbar.getProgress()); |
| 130 | } |
| 131 | } |
| 132 | }); |
| 133 | |
| 134 | /* |
| 135 | * Create renderScript |
| 136 | */ |
| 137 | createScript(); |
| 138 | |
| 139 | /* |
| 140 | * Create thumbnails |
| 141 | */ |
| 142 | createThumbnail(); |
| 143 | |
| 144 | |
| 145 | /* |
| 146 | * Invoke renderScript kernel and update imageView |
| 147 | */ |
| 148 | mFilterMode = MODE_BLUR; |
| 149 | updateImage(50); |
| 150 | } |
| 151 | |
| 152 | private void createScript() { |
| 153 | mRS = RenderScript.create(this); |
| 154 | |
| 155 | mInAllocation = Allocation.createFromBitmap(mRS, mBitmapIn); |
| 156 | |
| 157 | mOutAllocations = new Allocation[NUM_BITMAPS]; |
| 158 | for (int i = 0; i < NUM_BITMAPS; ++i) { |
| 159 | mOutAllocations[i] = Allocation.createFromBitmap(mRS, mBitmapsOut[i]); |
| 160 | } |
| 161 | |
| 162 | /* |
| 163 | Create intrinsics. |
| 164 | RenderScript has built-in features such as blur, convolve filter etc. |
| 165 | These intrinsics are handy for specific operations without writing RenderScript kernel. |
| 166 | In the sample, it's creating blur, convolve and matrix intrinsics. |
| 167 | */ |
| 168 | |
| 169 | mScriptBlur = ScriptIntrinsicBlur.create(mRS, Element.U8_4(mRS)); |
| 170 | mScriptConvolve = ScriptIntrinsicConvolve5x5.create(mRS, |
| 171 | Element.U8_4(mRS)); |
| 172 | mScriptMatrix = ScriptIntrinsicColorMatrix.create(mRS, |
| 173 | Element.U8_4(mRS)); |
| 174 | } |
| 175 | |
| 176 | private void performFilter(Allocation inAllocation, |
| 177 | Allocation outAllocation, Bitmap bitmapOut, float value) { |
| 178 | switch (mFilterMode) { |
| 179 | case MODE_BLUR: |
| 180 | /* |
| 181 | * Set blur kernel size |
| 182 | */ |
| 183 | mScriptBlur.setRadius(value); |
| 184 | |
| 185 | /* |
| 186 | * Invoke filter kernel |
| 187 | */ |
| 188 | mScriptBlur.setInput(inAllocation); |
| 189 | mScriptBlur.forEach(outAllocation); |
| 190 | break; |
| 191 | case MODE_CONVOLVE: { |
| 192 | float f1 = value; |
| 193 | float f2 = 1.0f - f1; |
| 194 | |
| 195 | // Emboss filter kernel |
| 196 | float coefficients[] = {-f1 * 2, 0, -f1, 0, 0, 0, -f2 * 2, -f2, 0, |
| 197 | 0, -f1, -f2, 1, f2, f1, 0, 0, f2, f2 * 2, 0, 0, 0, f1, 0, |
| 198 | f1 * 2,}; |
| 199 | /* |
| 200 | * Set kernel parameter |
| 201 | */ |
| 202 | mScriptConvolve.setCoefficients(coefficients); |
| 203 | |
| 204 | /* |
| 205 | * Invoke filter kernel |
| 206 | */ |
| 207 | mScriptConvolve.setInput(inAllocation); |
| 208 | mScriptConvolve.forEach(outAllocation); |
| 209 | break; |
| 210 | } |
| 211 | case MODE_COLORMATRIX: { |
| 212 | /* |
| 213 | * Set HUE rotation matrix |
| 214 | * The matrix below performs a combined operation of, |
| 215 | * RGB->HSV transform * HUE rotation * HSV->RGB transform |
| 216 | */ |
| 217 | float cos = (float) Math.cos((double) value); |
| 218 | float sin = (float) Math.sin((double) value); |
| 219 | Matrix3f mat = new Matrix3f(); |
| 220 | mat.set(0, 0, (float) (.299 + .701 * cos + .168 * sin)); |
| 221 | mat.set(1, 0, (float) (.587 - .587 * cos + .330 * sin)); |
| 222 | mat.set(2, 0, (float) (.114 - .114 * cos - .497 * sin)); |
| 223 | mat.set(0, 1, (float) (.299 - .299 * cos - .328 * sin)); |
| 224 | mat.set(1, 1, (float) (.587 + .413 * cos + .035 * sin)); |
| 225 | mat.set(2, 1, (float) (.114 - .114 * cos + .292 * sin)); |
| 226 | mat.set(0, 2, (float) (.299 - .3 * cos + 1.25 * sin)); |
| 227 | mat.set(1, 2, (float) (.587 - .588 * cos - 1.05 * sin)); |
| 228 | mat.set(2, 2, (float) (.114 + .886 * cos - .203 * sin)); |
| 229 | mScriptMatrix.setColorMatrix(mat); |
| 230 | |
| 231 | /* |
| 232 | * Invoke filter kernel |
| 233 | */ |
| 234 | mScriptMatrix.forEach(inAllocation, outAllocation); |
| 235 | } |
| 236 | break; |
| 237 | } |
| 238 | |
| 239 | /* |
| 240 | * Copy to bitmap and invalidate image view |
| 241 | */ |
| 242 | outAllocation.copyTo(bitmapOut); |
| 243 | } |
| 244 | |
| 245 | /* |
| 246 | Convert seekBar progress parameter (0-100 in range) to parameter for each intrinsic filter. |
| 247 | (e.g. 1.0-25.0 in Blur filter) |
| 248 | */ |
| 249 | private float getFilterParameter(int i) { |
| 250 | float f = 0.f; |
| 251 | switch (mFilterMode) { |
| 252 | case MODE_BLUR: { |
| 253 | final float max = 25.0f; |
| 254 | final float min = 1.f; |
| 255 | f = (float) ((max - min) * (i / 100.0) + min); |
| 256 | } |
| 257 | break; |
| 258 | case MODE_CONVOLVE: { |
| 259 | final float max = 2.f; |
| 260 | final float min = 0.f; |
| 261 | f = (float) ((max - min) * (i / 100.0) + min); |
| 262 | } |
| 263 | break; |
| 264 | case MODE_COLORMATRIX: { |
| 265 | final float max = (float) Math.PI; |
| 266 | final float min = (float) -Math.PI; |
| 267 | f = (float) ((max - min) * (i / 100.0) + min); |
| 268 | } |
| 269 | break; |
| 270 | } |
| 271 | return f; |
| 272 | |
| 273 | } |
| 274 | |
| 275 | /* |
| 276 | * In the AsyncTask, it invokes RenderScript intrinsics to do a filtering. |
| 277 | * After the filtering is done, an operation blocks at Allication.copyTo() in AsyncTask thread. |
| 278 | * Once all operation is finished at onPostExecute() in UI thread, it can invalidate and update ImageView UI. |
| 279 | */ |
| 280 | private class RenderScriptTask extends AsyncTask<Float, Integer, Integer> { |
| 281 | Boolean issued = false; |
| 282 | |
| 283 | protected Integer doInBackground(Float... values) { |
| 284 | int index = -1; |
| 285 | if (isCancelled() == false) { |
| 286 | issued = true; |
| 287 | index = mCurrentBitmap; |
| 288 | |
| 289 | performFilter(mInAllocation, mOutAllocations[index], mBitmapsOut[index], values[0]); |
| 290 | mCurrentBitmap = (mCurrentBitmap + 1) % NUM_BITMAPS; |
| 291 | } |
| 292 | return index; |
| 293 | } |
| 294 | |
| 295 | void updateView(Integer result) { |
| 296 | if (result != -1) { |
| 297 | // Request UI update |
| 298 | mImageView.setImageBitmap(mBitmapsOut[result]); |
| 299 | mImageView.invalidate(); |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | protected void onPostExecute(Integer result) { |
| 304 | updateView(result); |
| 305 | } |
| 306 | |
| 307 | protected void onCancelled(Integer result) { |
| 308 | if (issued) { |
| 309 | updateView(result); |
| 310 | } |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | /* |
| 315 | Invoke AsynchTask and cancel previous task. |
| 316 | When AsyncTasks are piled up (typically in slow device with heavy kernel), |
| 317 | Only the latest (and already started) task invokes RenderScript operation. |
| 318 | */ |
| 319 | private void updateImage(int progress) { |
| 320 | float f = getFilterParameter(progress); |
| 321 | |
| 322 | if (mLatestTask != null) |
| 323 | mLatestTask.cancel(false); |
| 324 | mLatestTask = new RenderScriptTask(); |
| 325 | |
| 326 | mLatestTask.execute(f); |
| 327 | } |
| 328 | |
| 329 | /* |
| 330 | Helper to load Bitmap from resource |
| 331 | */ |
| 332 | private Bitmap loadBitmap(int resource) { |
| 333 | final BitmapFactory.Options options = new BitmapFactory.Options(); |
| 334 | options.inPreferredConfig = Bitmap.Config.ARGB_8888; |
| 335 | return BitmapFactory.decodeResource(getResources(), resource, options); |
| 336 | } |
| 337 | |
| 338 | /* |
| 339 | Create thumbNail for UI. It invokes RenderScript kernel synchronously in UI-thread, |
| 340 | which is OK for small thumbnail (but not ideal). |
| 341 | */ |
| 342 | private void createThumbnail() { |
| 343 | int width = 72; |
| 344 | int height = 96; |
| 345 | float scale = getResources().getDisplayMetrics().density; |
| 346 | int pixelsWidth = (int) (width * scale + 0.5f); |
| 347 | int pixelsHeight = (int) (height * scale + 0.5f); |
| 348 | |
| 349 | //Temporary image |
| 350 | Bitmap tempBitmap = Bitmap.createScaledBitmap(mBitmapIn, pixelsWidth, pixelsHeight, false); |
| 351 | Allocation inAllocation = Allocation.createFromBitmap(mRS, tempBitmap); |
| 352 | |
| 353 | //Create thumbnail with each RS intrinsic and set it to radio buttons |
| 354 | int[] modes = {MODE_BLUR, MODE_CONVOLVE, MODE_COLORMATRIX}; |
| 355 | int[] ids = {R.id.radio0, R.id.radio1, R.id.radio2}; |
| 356 | int[] parameter = {50, 100, 25}; |
| 357 | for (int mode : modes) { |
| 358 | mFilterMode = mode; |
| 359 | float f = getFilterParameter(parameter[mode]); |
| 360 | |
| 361 | Bitmap destBitpmap = Bitmap.createBitmap(tempBitmap.getWidth(), |
| 362 | tempBitmap.getHeight(), tempBitmap.getConfig()); |
| 363 | Allocation outAllocation = Allocation.createFromBitmap(mRS, destBitpmap); |
| 364 | performFilter(inAllocation, outAllocation, destBitpmap, f); |
| 365 | |
| 366 | ThumbnailRadioButton button = (ThumbnailRadioButton) findViewById(ids[mode]); |
| 367 | button.setThumbnail(destBitpmap); |
| 368 | } |
| 369 | } |
| 370 | } |