diff options
Diffstat (limited to 'src/com/android/gallery3d/filtershow/pipeline/CacheProcessing.java')
| -rw-r--r-- | src/com/android/gallery3d/filtershow/pipeline/CacheProcessing.java | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/pipeline/CacheProcessing.java b/src/com/android/gallery3d/filtershow/pipeline/CacheProcessing.java new file mode 100644 index 000000000..e0269e9bb --- /dev/null +++ b/src/com/android/gallery3d/filtershow/pipeline/CacheProcessing.java @@ -0,0 +1,193 @@ +/* + * Copyright (C) 2013 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.android.gallery3d.filtershow.pipeline; + +import android.graphics.Bitmap; +import android.util.Log; +import com.android.gallery3d.filtershow.filters.FilterRepresentation; + +import java.util.Vector; + +public class CacheProcessing { + private static final String LOGTAG = "CacheProcessing"; + private static final boolean DEBUG = false; + private Vector<CacheStep> mSteps = new Vector<CacheStep>(); + + static class CacheStep { + FilterRepresentation representation; + Bitmap cache; + } + + public Bitmap process(Bitmap originalBitmap, + Vector<FilterRepresentation> filters, + FilterEnvironment environment) { + + if (filters.size() == 0) { + return originalBitmap; + } + + // New set of filters, let's clear the cache and rebuild it. + if (filters.size() != mSteps.size()) { + mSteps.clear(); + for (int i = 0; i < filters.size(); i++) { + FilterRepresentation representation = filters.elementAt(i); + CacheStep step = new CacheStep(); + step.representation = representation.copy(); + mSteps.add(step); + } + } + + if (DEBUG) { + displayFilters(filters); + } + + // First, let's find how similar we are in our cache + // compared to the current list of filters + int similarUpToIndex = -1; + for (int i = 0; i < filters.size(); i++) { + FilterRepresentation representation = filters.elementAt(i); + CacheStep step = mSteps.elementAt(i); + boolean similar = step.representation.equals(representation); + if (similar) { + similarUpToIndex = i; + } else { + break; + } + } + if (DEBUG) { + Log.v(LOGTAG, "similar up to index " + similarUpToIndex); + } + + // Now, let's get the earliest cached result in our pipeline + Bitmap cacheBitmap = null; + int findBaseImageIndex = similarUpToIndex; + if (findBaseImageIndex > -1) { + while (findBaseImageIndex > 0 + && mSteps.elementAt(findBaseImageIndex).cache == null) { + findBaseImageIndex--; + } + cacheBitmap = mSteps.elementAt(findBaseImageIndex).cache; + } + boolean emptyStack = false; + if (cacheBitmap == null) { + emptyStack = true; + // Damn, it's an empty stack, we have to start from scratch + // TODO: use a bitmap cache + RS allocation instead of Bitmap.copy() + cacheBitmap = originalBitmap.copy(Bitmap.Config.ARGB_8888, true); + if (findBaseImageIndex > -1) { + FilterRepresentation representation = filters.elementAt(findBaseImageIndex); + if (representation.getFilterType() != FilterRepresentation.TYPE_GEOMETRY) { + cacheBitmap = environment.applyRepresentation(representation, cacheBitmap); + } + mSteps.elementAt(findBaseImageIndex).representation = representation.copy(); + mSteps.elementAt(findBaseImageIndex).cache = cacheBitmap; + } + if (DEBUG) { + Log.v(LOGTAG, "empty stack"); + } + } + + // Ok, so sadly the earliest cached result is before the index we want. + // We have to rebuild a new result for this position, and then cache it. + if (findBaseImageIndex != similarUpToIndex) { + if (DEBUG) { + Log.v(LOGTAG, "rebuild cacheBitmap from " + findBaseImageIndex + + " to " + similarUpToIndex); + } + // rebuild the cache image for this step + if (!emptyStack) { + cacheBitmap = cacheBitmap.copy(Bitmap.Config.ARGB_8888, true); + } else { + // if it was an empty stack, we already applied it + findBaseImageIndex ++; + } + for (int i = findBaseImageIndex; i <= similarUpToIndex; i++) { + FilterRepresentation representation = filters.elementAt(i); + if (representation.getFilterType() != FilterRepresentation.TYPE_GEOMETRY) { + cacheBitmap = environment.applyRepresentation(representation, cacheBitmap); + } + if (DEBUG) { + Log.v(LOGTAG, " - " + i + " => apply " + representation.getName()); + } + } + // Let's cache it! + mSteps.elementAt(similarUpToIndex).cache = cacheBitmap; + } + + if (DEBUG) { + Log.v(LOGTAG, "process pipeline from " + similarUpToIndex + + " to " + (filters.size() - 1)); + } + + // Now we are good to go, let's use the cacheBitmap as a starting point + for (int i = similarUpToIndex + 1; i < filters.size(); i++) { + FilterRepresentation representation = filters.elementAt(i); + CacheStep currentStep = mSteps.elementAt(i); + cacheBitmap = cacheBitmap.copy(Bitmap.Config.ARGB_8888, true); + if (representation.getFilterType() != FilterRepresentation.TYPE_GEOMETRY) { + cacheBitmap = environment.applyRepresentation(representation, cacheBitmap); + } + currentStep.representation = representation.copy(); + currentStep.cache = cacheBitmap; + if (DEBUG) { + Log.v(LOGTAG, " - " + i + " => apply " + representation.getName()); + } + } + + if (DEBUG) { + Log.v(LOGTAG, "now let's cleanup the cache..."); + displayNbBitmapsInCache(); + } + + // Let's see if we can cleanup the cache for unused bitmaps + for (int i = 0; i < similarUpToIndex; i++) { + CacheStep currentStep = mSteps.elementAt(i); + currentStep.cache = null; + } + + if (DEBUG) { + Log.v(LOGTAG, "cleanup done..."); + displayNbBitmapsInCache(); + } + return cacheBitmap; + } + + private void displayFilters(Vector<FilterRepresentation> filters) { + Log.v(LOGTAG, "------>>>"); + for (int i = 0; i < filters.size(); i++) { + FilterRepresentation representation = filters.elementAt(i); + CacheStep step = mSteps.elementAt(i); + boolean similar = step.representation.equals(representation); + Log.v(LOGTAG, "[" + i + "] - " + representation.getName() + + " similar rep ? " + (similar ? "YES" : "NO") + + " -- bitmap: " + step.cache); + } + Log.v(LOGTAG, "<<<------"); + } + + private void displayNbBitmapsInCache() { + int nbBitmapsCached = 0; + for (int i = 0; i < mSteps.size(); i++) { + CacheStep step = mSteps.elementAt(i); + if (step.cache != null) { + nbBitmapsCached++; + } + } + Log.v(LOGTAG, "nb bitmaps in cache: " + nbBitmapsCached + " / " + mSteps.size()); + } + +} |