src/com/android/gallery3d/filtershow/pipeline/ImagePreset.java

   1 /*
   2  * Copyright (C) 2012 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.android.gallery3d.filtershow.pipeline;
  18
  19 import android.graphics.Bitmap;
  20 import android.graphics.Rect;
  21 import android.support.v8.renderscript.Allocation;
  22 import android.util.JsonReader;
  23 import android.util.JsonWriter;
  24 import android.util.Log;
  25
  26 import com.android.gallery3d.R;
  27 import com.android.gallery3d.filtershow.cache.BitmapCache;
  28 import com.android.gallery3d.filtershow.cache.ImageLoader;
  29 import com.android.gallery3d.filtershow.filters.BaseFiltersManager;
  30 import com.android.gallery3d.filtershow.filters.FilterCropRepresentation;
  31 import com.android.gallery3d.filtershow.filters.FilterFxRepresentation;
  32 import com.android.gallery3d.filtershow.filters.FilterImageBorderRepresentation;
  33 import com.android.gallery3d.filtershow.filters.FilterMirrorRepresentation;
  34 import com.android.gallery3d.filtershow.filters.FilterRepresentation;
  35 import com.android.gallery3d.filtershow.filters.FilterRotateRepresentation;
  36 import com.android.gallery3d.filtershow.filters.FilterStraightenRepresentation;
  37 import com.android.gallery3d.filtershow.filters.FilterUserPresetRepresentation;
  38 import com.android.gallery3d.filtershow.filters.FiltersManager;
  39 import com.android.gallery3d.filtershow.filters.ImageFilter;
  40 import com.android.gallery3d.filtershow.imageshow.GeometryMathUtils;
  41 import com.android.gallery3d.filtershow.imageshow.MasterImage;
  42 import com.android.gallery3d.filtershow.state.State;
  43 import com.android.gallery3d.filtershow.state.StateAdapter;
  44
  45 import java.io.IOException;
  46 import java.io.StringReader;
  47 import java.io.StringWriter;
  48 import java.util.ArrayList;
  49 import java.util.Collection;
  50 import java.util.Vector;
  51
  52 public class ImagePreset {
  53
  54     private static final String LOGTAG = "ImagePreset";
  55     public static final String JASON_SAVED = "Saved";
  56
  57     private Vector<FilterRepresentation> mFilters = new Vector<FilterRepresentation>();
  58
  59     private boolean mDoApplyGeometry = true;
  60     private boolean mDoApplyFilters = true;
  61
  62     private boolean mPartialRendering = false;
  63     private Rect mPartialRenderingBounds;
  64     private static final boolean DEBUG = false;
  65
  66     public ImagePreset() {
  67     }
  68
  69     public ImagePreset(ImagePreset source) {
  70         for (int i = 0; i < source.mFilters.size(); i++) {
  71             FilterRepresentation sourceRepresentation = source.mFilters.elementAt(i);
  72             mFilters.add(sourceRepresentation.copy());
  73         }
  74     }
  75
  76     public Vector<FilterRepresentation> getFilters() {
  77         return mFilters;
  78     }
  79
  80     public FilterRepresentation getFilterRepresentation(int position) {
  81         FilterRepresentation representation = null;
  82
  83         representation = mFilters.elementAt(position).copy();
  84
  85         return representation;
  86     }
  87
  88     private static boolean sameSerializationName(String a, String b) {
  89         if (a != null && b != null) {
  90             return a.equals(b);
  91         } else {
  92             return a == null && b == null;
  93         }
  94     }
  95
  96     public static boolean sameSerializationName(FilterRepresentation a, FilterRepresentation b) {
  97         if (a == null || b == null) {
  98             return false;
  99         }
 100         return sameSerializationName(a.getSerializationName(), b.getSerializationName());
 101     }
 102
 103     public int getPositionForRepresentation(FilterRepresentation representation) {
 104         for (int i = 0; i < mFilters.size(); i++) {
 105             if (sameSerializationName(mFilters.elementAt(i), representation)) {
 106                 return i;
 107             }
 108         }
 109         return -1;
 110     }
 111
 112     private FilterRepresentation getFilterRepresentationForType(int type) {
 113         for (int i = 0; i < mFilters.size(); i++) {
 114             if (mFilters.elementAt(i).getFilterType() == type) {
 115                 return mFilters.elementAt(i);
 116             }
 117         }
 118         return null;
 119     }
 120
 121     public int getPositionForType(int type) {
 122         for (int i = 0; i < mFilters.size(); i++) {
 123             if (mFilters.elementAt(i).getFilterType() == type) {
 124                 return i;
 125             }
 126         }
 127         return -1;
 128     }
 129
 130     public FilterRepresentation getFilterRepresentationCopyFrom(
 131             FilterRepresentation filterRepresentation) {
 132         // TODO: add concept of position in the filters (to allow multiple instances)
 133         if (filterRepresentation == null) {
 134             return null;
 135         }
 136         int position = getPositionForRepresentation(filterRepresentation);
 137         if (position == -1) {
 138             return null;
 139         }
 140         FilterRepresentation representation = mFilters.elementAt(position);
 141         if (representation != null) {
 142             representation = representation.copy();
 143         }
 144         return representation;
 145     }
 146
 147     public void updateFilterRepresentations(Collection<FilterRepresentation> reps) {
 148         for (FilterRepresentation r : reps) {
 149             updateOrAddFilterRepresentation(r);
 150         }
 151     }
 152
 153     public void updateOrAddFilterRepresentation(FilterRepresentation rep) {
 154         int pos = getPositionForRepresentation(rep);
 155         if (pos != -1) {
 156             mFilters.elementAt(pos).useParametersFrom(rep);
 157         } else {
 158             addFilter(rep.copy());
 159         }
 160     }
 161
 162     public void setDoApplyGeometry(boolean value) {
 163         mDoApplyGeometry = value;
 164     }
 165
 166     public void setDoApplyFilters(boolean value) {
 167         mDoApplyFilters = value;
 168     }
 169
 170     public boolean getDoApplyFilters() {
 171         return mDoApplyFilters;
 172     }
 173
 174     public boolean hasModifications() {
 175         for (int i = 0; i < mFilters.size(); i++) {
 176             FilterRepresentation filter = mFilters.elementAt(i);
 177             if (!filter.isNil()) {
 178                 return true;
 179             }
 180         }
 181         return false;
 182     }
 183
 184     public boolean contains(byte type) {
 185         for (FilterRepresentation representation : mFilters) {
 186             if (representation.getFilterType() == type
 187                     && !representation.isNil()) {
 188                 return true;
 189             }
 190         }
 191         return false;
 192     }
 193
 194     public boolean isPanoramaSafe() {
 195         for (FilterRepresentation representation : mFilters) {
 196             if (representation.getFilterType() == FilterRepresentation.TYPE_GEOMETRY
 197                     && !representation.isNil()) {
 198                 return false;
 199             }
 200             if (representation.getFilterType() == FilterRepresentation.TYPE_BORDER
 201                     && !representation.isNil()) {
 202                 return false;
 203             }
 204             if (representation.getFilterType() == FilterRepresentation.TYPE_VIGNETTE
 205                     && !representation.isNil()) {
 206                 return false;
 207             }
 208             if (representation.getFilterType() == FilterRepresentation.TYPE_TINYPLANET
 209                     && !representation.isNil()) {
 210                 return false;
 211             }
 212         }
 213         return true;
 214     }
 215
 216     public boolean same(ImagePreset preset) {
 217         if (preset == null) {
 218             return false;
 219         }
 220
 221         if (preset.mFilters.size() != mFilters.size()) {
 222             return false;
 223         }
 224
 225         if (mDoApplyGeometry != preset.mDoApplyGeometry) {
 226             return false;
 227         }
 228
 229         if (mDoApplyFilters != preset.mDoApplyFilters) {
 230             if (mFilters.size() > 0 || preset.mFilters.size() > 0) {
 231                 return false;
 232             }
 233         }
 234
 235         if (mDoApplyFilters && preset.mDoApplyFilters) {
 236             for (int i = 0; i < preset.mFilters.size(); i++) {
 237                 FilterRepresentation a = preset.mFilters.elementAt(i);
 238                 FilterRepresentation b = mFilters.elementAt(i);
 239
 240                 if (!a.same(b)) {
 241                     return false;
 242                 }
 243             }
 244         }
 245
 246         return true;
 247     }
 248
 249     public boolean equals(ImagePreset preset) {
 250         if (preset == null) {
 251             return false;
 252         }
 253
 254         if (preset.mFilters.size() != mFilters.size()) {
 255             return false;
 256         }
 257
 258         if (mDoApplyGeometry != preset.mDoApplyGeometry) {
 259             return false;
 260         }
 261
 262         if (mDoApplyFilters != preset.mDoApplyFilters) {
 263             if (mFilters.size() > 0 || preset.mFilters.size() > 0) {
 264                 return false;
 265             }
 266         }
 267
 268         for (int i = 0; i < preset.mFilters.size(); i++) {
 269             FilterRepresentation a = preset.mFilters.elementAt(i);
 270             FilterRepresentation b = mFilters.elementAt(i);
 271             boolean isGeometry = false;
 272             if (a instanceof FilterRotateRepresentation
 273                     || a instanceof FilterMirrorRepresentation
 274                     || a instanceof FilterCropRepresentation
 275                     || a instanceof FilterStraightenRepresentation) {
 276                 isGeometry = true;
 277             }
 278             boolean evaluate = true;
 279             if (!isGeometry && mDoApplyGeometry && !mDoApplyFilters) {
 280                 evaluate = false;
 281             } else if (isGeometry && !mDoApplyGeometry && mDoApplyFilters) {
 282                 evaluate = false;
 283             }
 284             if (evaluate && !a.equals(b)) {
 285                 return false;
 286             }
 287         }
 288
 289         return true;
 290     }
 291
 292     public int similarUpTo(ImagePreset preset) {
 293         for (int i = 0; i < preset.mFilters.size(); i++) {
 294             FilterRepresentation a = preset.mFilters.elementAt(i);
 295             if (i < mFilters.size()) {
 296                 FilterRepresentation b = mFilters.elementAt(i);
 297                 if (!a.same(b)) {
 298                     return i;
 299                 }
 300                 if (!a.equals(b)) {
 301                     return i;
 302                 }
 303             } else {
 304                 return i;
 305             }
 306         }
 307         return preset.mFilters.size();
 308     }
 309
 310     public void showFilters() {
 311         Log.v(LOGTAG, "\\\\\\ showFilters -- " + mFilters.size() + " filters");
 312         int n = 0;
 313         for (FilterRepresentation representation : mFilters) {
 314             Log.v(LOGTAG, " filter " + n + " : " + representation.toString());
 315             n++;
 316         }
 317         Log.v(LOGTAG, "/// showFilters -- " + mFilters.size() + " filters");
 318     }
 319
 320     public FilterRepresentation getLastRepresentation() {
 321         if (mFilters.size() > 0) {
 322             return mFilters.lastElement();
 323         }
 324         return null;
 325     }
 326
 327     public void removeFilter(FilterRepresentation filterRepresentation) {
 328         if (filterRepresentation.getFilterType() == FilterRepresentation.TYPE_BORDER) {
 329             for (int i = 0; i < mFilters.size(); i++) {
 330                 if (mFilters.elementAt(i).getFilterType()
 331                 == filterRepresentation.getFilterType()) {
 332                     mFilters.remove(i);
 333                     break;
 334                 }
 335             }
 336         } else {
 337             for (int i = 0; i < mFilters.size(); i++) {
 338                 if (sameSerializationName(mFilters.elementAt(i), filterRepresentation)) {
 339                     mFilters.remove(i);
 340                     break;
 341                 }
 342             }
 343         }
 344     }
 345
 346     // If the filter is an "None" effect or border, then just don't add this filter.
 347     public void addFilter(FilterRepresentation representation) {
 348         if (representation instanceof FilterUserPresetRepresentation) {
 349             ImagePreset preset = ((FilterUserPresetRepresentation) representation).getImagePreset();
 350             if (preset.nbFilters() == 1
 351                 && preset.contains(FilterRepresentation.TYPE_FX)) {
 352                 FilterRepresentation rep = preset.getFilterRepresentationForType(
 353                         FilterRepresentation.TYPE_FX);
 354                 addFilter(rep);
 355             } else {
 356                 // user preset replaces everything
 357                 mFilters.clear();
 358                 for (int i = 0; i < preset.nbFilters(); i++) {
 359                     addFilter(preset.getFilterRepresentation(i));
 360                 }
 361             }
 362         } else if (representation.getFilterType() == FilterRepresentation.TYPE_GEOMETRY) {
 363             // Add geometry filter, removing duplicates and do-nothing operations.
 364             for (int i = 0; i < mFilters.size(); i++) {
 365                 if (sameSerializationName(representation, mFilters.elementAt(i))) {
 366                     mFilters.remove(i);
 367                 }
 368             }
 369             int index = 0;
 370             for (; index < mFilters.size(); index++) {
 371                 FilterRepresentation rep = mFilters.elementAt(index);
 372                 if (rep.getFilterType() != FilterRepresentation.TYPE_GEOMETRY) {
 373                     break;
 374                 }
 375             }
 376             if (!representation.isNil()) {
 377                 mFilters.insertElementAt(representation, index);
 378             }
 379         } else if (representation.getFilterType() == FilterRepresentation.TYPE_BORDER) {
 380             removeFilter(representation);
 381             if (!isNoneBorderFilter(representation)) {
 382                 mFilters.add(representation);
 383             }
 384         } else if (representation.getFilterType() == FilterRepresentation.TYPE_FX) {
 385             boolean replaced = false;
 386             for (int i = 0; i < mFilters.size(); i++) {
 387                 FilterRepresentation current = mFilters.elementAt(i);
 388                 if (current.getFilterType() == FilterRepresentation.TYPE_FX) {
 389                     mFilters.remove(i);
 390                     replaced = true;
 391                     if (!isNoneFxFilter(representation)) {
 392                         mFilters.add(i, representation);
 393                     }
 394                     break;
 395                 }
 396             }
 397             if (!replaced && !isNoneFxFilter(representation)) {
 398                 mFilters.add(0, representation);
 399             }
 400         } else {
 401             mFilters.add(representation);
 402         }
 403         // Enforces Filter type ordering for borders
 404         FilterRepresentation border = null;
 405         for (int i = 0; i < mFilters.size();) {
 406             FilterRepresentation rep = mFilters.elementAt(i);
 407             if (rep.getFilterType() == FilterRepresentation.TYPE_BORDER) {
 408                 border = rep;
 409                 mFilters.remove(i);
 410                 continue;
 411             }
 412             i++;
 413         }
 414         if (border != null) {
 415             mFilters.add(border);
 416         }
 417     }
 418
 419     private boolean isNoneBorderFilter(FilterRepresentation representation) {
 420         return representation instanceof FilterImageBorderRepresentation &&
 421                 ((FilterImageBorderRepresentation) representation).getDrawableResource() == 0;
 422     }
 423
 424     private boolean isNoneFxFilter(FilterRepresentation representation) {
 425         return representation instanceof FilterFxRepresentation &&
 426                 ((FilterFxRepresentation) representation).getNameResource() == R.string.none;
 427     }
 428
 429     public FilterRepresentation getRepresentation(FilterRepresentation filterRepresentation) {
 430         for (int i = 0; i < mFilters.size(); i++) {
 431             FilterRepresentation representation = mFilters.elementAt(i);
 432             if (sameSerializationName(representation, filterRepresentation)) {
 433                 return representation;
 434             }
 435         }
 436         return null;
 437     }
 438
 439     public Bitmap apply(Bitmap original, FilterEnvironment environment) {
 440         Bitmap bitmap = original;
 441         bitmap = applyFilters(bitmap, -1, -1, environment);
 442         return applyBorder(bitmap, environment);
 443     }
 444
 445     public Collection<FilterRepresentation> getGeometryFilters() {
 446         ArrayList<FilterRepresentation> geometry = new ArrayList<FilterRepresentation>();
 447         for (FilterRepresentation r : mFilters) {
 448             if (r.getFilterType() == FilterRepresentation.TYPE_GEOMETRY) {
 449                 geometry.add(r);
 450             }
 451         }
 452         return geometry;
 453     }
 454
 455     public FilterRepresentation getFilterWithSerializationName(String serializationName) {
 456         for (FilterRepresentation r : mFilters) {
 457             if (r != null) {
 458                 if (sameSerializationName(r.getSerializationName(), serializationName)) {
 459                     return r.copy();
 460                 }
 461             }
 462         }
 463         return null;
 464     }
 465
 466     public Rect finalGeometryRect(int width, int height) {
 467         return GeometryMathUtils.finalGeometryRect(width, height, getGeometryFilters());
 468     }
 469
 470     public Bitmap applyGeometry(Bitmap bitmap, FilterEnvironment environment) {
 471         // Apply any transform -- 90 rotate, flip, straighten, crop
 472         // Returns a new bitmap.
 473         if (mDoApplyGeometry) {
 474             Bitmap bmp = GeometryMathUtils.applyGeometryRepresentations(
 475                     getGeometryFilters(), bitmap);
 476             if (bmp != bitmap) {
 477                 environment.cache(bitmap);
 478             }
 479             return bmp;
 480         }
 481         return bitmap;
 482     }
 483
 484     public Bitmap applyBorder(Bitmap bitmap, FilterEnvironment environment) {
 485         // get the border from the list of filters.
 486         FilterRepresentation border = getFilterRepresentationForType(
 487                 FilterRepresentation.TYPE_BORDER);
 488         if (border != null && mDoApplyGeometry) {
 489             bitmap = environment.applyRepresentation(border, bitmap);
 490             if (environment.getQuality() == FilterEnvironment.QUALITY_FINAL) {
 491             }
 492         }
 493         return bitmap;
 494     }
 495
 496     public int nbFilters() {
 497         return mFilters.size();
 498     }
 499
 500     public Bitmap applyFilters(Bitmap bitmap, int from, int to, FilterEnvironment environment) {
 501         if (mDoApplyFilters) {
 502             if (from < 0) {
 503                 from = 0;
 504             }
 505             if (to == -1) {
 506                 to = mFilters.size();
 507             }
 508             for (int i = from; i < to; i++) {
 509                 FilterRepresentation representation = mFilters.elementAt(i);
 510                 if (representation.getFilterType() == FilterRepresentation.TYPE_GEOMETRY) {
 511                     // skip the geometry as it's already applied.
 512                     continue;
 513                 }
 514                 if (representation.getFilterType() == FilterRepresentation.TYPE_BORDER) {
 515                     // for now, let's skip the border as it will be applied in
 516                     // applyBorder()
 517                     // TODO: might be worth getting rid of applyBorder.
 518                     continue;
 519                 }
 520                 Bitmap tmp = bitmap;
 521                 bitmap = environment.applyRepresentation(representation, bitmap);
 522                 if (tmp != bitmap) {
 523                     environment.cache(tmp);
 524                 }
 525                 if (environment.needsStop()) {
 526                     return bitmap;
 527                 }
 528             }
 529         }
 530
 531         return bitmap;
 532     }
 533
 534     public void applyBorder(Allocation in, Allocation out,
 535             boolean copyOut, FilterEnvironment environment) {
 536         FilterRepresentation border = getFilterRepresentationForType(
 537                 FilterRepresentation.TYPE_BORDER);
 538         if (border != null && mDoApplyGeometry) {
 539             // TODO: should keep the bitmap around
 540             Allocation bitmapIn = in;
 541             if (copyOut) {
 542                 bitmapIn = Allocation.createTyped(
 543                         CachingPipeline.getRenderScriptContext(), in.getType());
 544                 bitmapIn.copyFrom(out);
 545             }
 546             environment.applyRepresentation(border, bitmapIn, out);
 547         }
 548     }
 549
 550     public void applyFilters(int from, int to, Allocation in, Allocation out,
 551             FilterEnvironment environment) {
 552         if (mDoApplyFilters) {
 553             if (from < 0) {
 554                 from = 0;
 555             }
 556             if (to == -1) {
 557                 to = mFilters.size();
 558             }
 559             for (int i = from; i < to; i++) {
 560                 FilterRepresentation representation = mFilters.elementAt(i);
 561                 if (representation.getFilterType() == FilterRepresentation.TYPE_GEOMETRY
 562                         || representation.getFilterType() == FilterRepresentation.TYPE_BORDER) {
 563                     continue;
 564                 }
 565                 if (i > from) {
 566                     in.copyFrom(out);
 567                 }
 568                 environment.applyRepresentation(representation, in, out);
 569             }
 570         }
 571     }
 572
 573     public boolean canDoPartialRendering() {
 574         if (MasterImage.getImage().getZoomOrientation() != ImageLoader.ORI_NORMAL) {
 575             return false;
 576         }
 577         for (int i = 0; i < mFilters.size(); i++) {
 578             FilterRepresentation representation = mFilters.elementAt(i);
 579             if (!representation.supportsPartialRendering()) {
 580                 return false;
 581             }
 582         }
 583         return true;
 584     }
 585
 586     public void fillImageStateAdapter(StateAdapter imageStateAdapter) {
 587         if (imageStateAdapter == null) {
 588             return;
 589         }
 590         Vector<State> states = new Vector<State>();
 591         for (FilterRepresentation filter : mFilters) {
 592             if (filter instanceof FilterUserPresetRepresentation) {
 593                 // do not show the user preset itself in the state panel
 594                 continue;
 595             }
 596             State state = new State(filter.getName());
 597             state.setFilterRepresentation(filter);
 598             states.add(state);
 599         }
 600         imageStateAdapter.fill(states);
 601     }
 602
 603     public void setPartialRendering(boolean partialRendering, Rect bounds) {
 604         mPartialRendering = partialRendering;
 605         mPartialRenderingBounds = bounds;
 606     }
 607
 608     public boolean isPartialRendering() {
 609         return mPartialRendering;
 610     }
 611
 612     public Rect getPartialRenderingBounds() {
 613         return mPartialRenderingBounds;
 614     }
 615
 616     public Vector<ImageFilter> getUsedFilters(BaseFiltersManager filtersManager) {
 617         Vector<ImageFilter> usedFilters = new Vector<ImageFilter>();
 618         for (int i = 0; i < mFilters.size(); i++) {
 619             FilterRepresentation representation = mFilters.elementAt(i);
 620             ImageFilter filter = filtersManager.getFilterForRepresentation(representation);
 621             usedFilters.add(filter);
 622         }
 623         return usedFilters;
 624     }
 625
 626     public String getJsonString(String name) {
 627         StringWriter swriter = new StringWriter();
 628         try {
 629             JsonWriter writer = new JsonWriter(swriter);
 630             writeJson(writer, name);
 631             writer.close();
 632         } catch (IOException e) {
 633             return null;
 634         }
 635         return swriter.toString();
 636     }
 637
 638     public void writeJson(JsonWriter writer, String name) {
 639         int numFilters = mFilters.size();
 640         try {
 641             writer.beginObject();
 642             for (int i = 0; i < numFilters; i++) {
 643                 FilterRepresentation filter = mFilters.get(i);
 644                 if (filter instanceof FilterUserPresetRepresentation) {
 645                     continue;
 646                 }
 647                 String sname = filter.getSerializationName();
 648                 if (DEBUG) {
 649                     Log.v(LOGTAG, "Serialization: " + sname);
 650                     if (sname == null) {
 651                         Log.v(LOGTAG, "Serialization name null for filter: " + filter);
 652                     }
 653                 }
 654                 writer.name(sname);
 655                 filter.serializeRepresentation(writer);
 656             }
 657             writer.endObject();
 658
 659         } catch (IOException e) {
 660            Log.e(LOGTAG,"Error encoding JASON",e);
 661         }
 662     }
 663
 664     /**
 665      * populates preset from JSON string
 666      *
 667      * @param filterString a JSON string
 668      * @return true on success if false ImagePreset is undefined
 669      */
 670     public boolean readJsonFromString(String filterString) {
 671         if (DEBUG) {
 672             Log.v(LOGTAG, "reading preset: \"" + filterString + "\"");
 673         }
 674         StringReader sreader = new StringReader(filterString);
 675         try {
 676             JsonReader reader = new JsonReader(sreader);
 677             boolean ok = readJson(reader);
 678             if (!ok) {
 679                 reader.close();
 680                 return false;
 681             }
 682             reader.close();
 683         } catch (Exception e) {
 684             Log.e(LOGTAG, "\""+filterString+"\"");
 685             Log.e(LOGTAG, "parsing the filter parameters:", e);
 686             return false;
 687         }
 688         return true;
 689     }
 690
 691     /**
 692      * populates preset from JSON stream
 693      *
 694      * @param sreader a JSON string
 695      * @return true on success if false ImagePreset is undefined
 696      */
 697     public boolean readJson(JsonReader sreader) throws IOException {
 698         sreader.beginObject();
 699
 700         while (sreader.hasNext()) {
 701             String name = sreader.nextName();
 702             FilterRepresentation filter = creatFilterFromName(name);
 703             if (filter == null) {
 704                 Log.w(LOGTAG, "UNKNOWN FILTER! " + name);
 705                 return false;
 706             }
 707             filter.deSerializeRepresentation(sreader);
 708             addFilter(filter);
 709         }
 710         sreader.endObject();
 711         return true;
 712     }
 713
 714     FilterRepresentation creatFilterFromName(String name) {
 715         if (FilterRotateRepresentation.SERIALIZATION_NAME.equals(name)) {
 716             return new FilterRotateRepresentation();
 717         } else if (FilterMirrorRepresentation.SERIALIZATION_NAME.equals(name)) {
 718             return new FilterMirrorRepresentation();
 719         } else if (FilterStraightenRepresentation.SERIALIZATION_NAME.equals(name)) {
 720             return new FilterStraightenRepresentation();
 721         } else if (FilterCropRepresentation.SERIALIZATION_NAME.equals(name)) {
 722             return new FilterCropRepresentation();
 723         }
 724         FiltersManager filtersManager = FiltersManager.getManager();
 725         return filtersManager.createFilterFromName(name);
 726     }
 727
 728     public void updateWith(ImagePreset preset) {
 729         if (preset.mFilters.size() != mFilters.size()) {
 730             Log.e(LOGTAG, "Updating a preset with an incompatible one");
 731             return;
 732         }
 733         for (int i = 0; i < mFilters.size(); i++) {
 734             FilterRepresentation destRepresentation = mFilters.elementAt(i);
 735             FilterRepresentation sourceRepresentation = preset.mFilters.elementAt(i);
 736             destRepresentation.useParametersFrom(sourceRepresentation);
 737         }
 738     }
 739 }