ResourceCache.cpp revision d98aa2de9ab18e09c2be1997f41212740f51f6e6 
1/*
2 * Copyright (C) 2010 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#include <SkPixelRef.h>
18#include "ResourceCache.h"
19#include "Caches.h"
20
21namespace android {
22namespace uirenderer {
23
24///////////////////////////////////////////////////////////////////////////////
25// Resource cache
26///////////////////////////////////////////////////////////////////////////////
27
28void ResourceCache::logCache() {
29    LOGD("ResourceCache: cacheReport:");
30    for (size_t i = 0; i < mCache->size(); ++i) {
31        ResourceReference* ref = mCache->valueAt(i);
32        LOGD("  ResourceCache: mCache(%d): resource, ref = 0x%p, 0x%p",
33                i, mCache->keyAt(i), mCache->valueAt(i));
34        LOGD("  ResourceCache: mCache(%d): refCount, recycled, destroyed, type = %d, %d, %d, %d",
35                i, ref->refCount, ref->recycled, ref->destroyed, ref->resourceType);
36    }
37}
38
39ResourceCache::ResourceCache() {
40    mCache = new KeyedVector<void *, ResourceReference *>();
41}
42
43ResourceCache::~ResourceCache() {
44    delete mCache;
45}
46
47void ResourceCache::incrementRefcount(void* resource, ResourceType resourceType) {
48    for (size_t i = 0; i < mCache->size(); ++i) {
49        void* ref = mCache->valueAt(i);
50    }
51    ResourceReference* ref = mCache->indexOfKey(resource) >= 0 ? mCache->valueFor(resource) : NULL;
52    if (ref == NULL || mCache->size() == 0) {
53        ref = new ResourceReference(resourceType);
54        mCache->add(resource, ref);
55    }
56    ref->refCount++;
57}
58
59void ResourceCache::incrementRefcount(SkBitmap* bitmapResource) {
60    bitmapResource->pixelRef()->safeRef();
61    bitmapResource->getColorTable()->safeRef();
62    incrementRefcount((void*)bitmapResource, kBitmap);
63}
64
65void ResourceCache::incrementRefcount(SkiaShader* shaderResource) {
66    shaderResource->getSkShader()->safeRef();
67    incrementRefcount((void*)shaderResource, kShader);
68}
69
70void ResourceCache::decrementRefcount(void* resource) {
71    ResourceReference* ref = mCache->indexOfKey(resource) >= 0 ? mCache->valueFor(resource) : NULL;
72    if (ref == NULL) {
73        // Should not get here - shouldn't get a call to decrement if we're not yet tracking it
74        return;
75    }
76    ref->refCount--;
77    if (ref->refCount == 0) {
78        deleteResourceReference(resource, ref);
79    }
80}
81
82void ResourceCache::decrementRefcount(SkBitmap* bitmapResource) {
83    bitmapResource->pixelRef()->safeUnref();
84    bitmapResource->getColorTable()->safeUnref();
85    decrementRefcount((void*)bitmapResource);
86}
87
88void ResourceCache::decrementRefcount(SkiaShader* shaderResource) {
89    shaderResource->getSkShader()->safeUnref();
90    decrementRefcount((void*)shaderResource);
91}
92
93void ResourceCache::recycle(SkBitmap* resource) {
94    if (mCache->indexOfKey(resource) < 0) {
95        // not tracking this resource; just recycle the pixel data
96        resource->setPixels(NULL, NULL);
97        return;
98    }
99    recycle((void*) resource);
100}
101
102void ResourceCache::recycle(void* resource) {
103    ResourceReference* ref = mCache->indexOfKey(resource) >= 0 ? mCache->valueFor(resource) : NULL;
104    if (ref == NULL) {
105        // Should not get here - shouldn't get a call to recycle if we're not yet tracking it
106        return;
107    }
108    ref->recycled = true;
109    if (ref->refCount == 0) {
110        deleteResourceReference(resource, ref);
111    }
112}
113
114void ResourceCache::destructor(SkBitmap* resource) {
115    ResourceReference* ref = mCache->indexOfKey(resource) >= 0 ? mCache->valueFor(resource) : NULL;
116    if (ref == NULL) {
117        // If we're not tracking this resource, just delete it
118        if (Caches::hasInstance()) {
119            Caches::getInstance().textureCache.remove(resource);
120        }
121        delete resource;
122        return;
123    }
124    ref->destroyed = true;
125    if (ref->refCount == 0) {
126        deleteResourceReference(resource, ref);
127        return;
128    }
129}
130
131void ResourceCache::destructor(SkiaShader* resource) {
132    ResourceReference* ref = mCache->indexOfKey(resource) >= 0 ? mCache->valueFor(resource) : NULL;
133    if (ref == NULL) {
134        // If we're not tracking this resource, just delete it
135        if (Caches::hasInstance()) {
136            Caches::getInstance().gradientCache.remove(resource->getSkShader());
137        }
138        delete resource;
139        return;
140    }
141    ref->destroyed = true;
142    if (ref->refCount == 0) {
143        deleteResourceReference(resource, ref);
144        return;
145    }
146}
147
148void ResourceCache::deleteResourceReference(void* resource, ResourceReference* ref) {
149    if (ref->recycled && ref->resourceType == kBitmap) {
150        ((SkBitmap*) resource)->setPixels(NULL, NULL);
151    }
152    if (ref->destroyed) {
153        switch (ref->resourceType) {
154            case kBitmap:
155            {
156                SkBitmap* bitmap = (SkBitmap*)resource;
157                if (Caches::hasInstance()) {
158                    Caches::getInstance().textureCache.remove(bitmap);
159                }
160                delete bitmap;
161            }
162            break;
163            case kShader:
164                SkiaShader* shader = (SkiaShader*)resource;
165                if (Caches::hasInstance()) {
166                    Caches::getInstance().gradientCache.remove(shader->getSkShader());
167                }
168                delete shader;
169                break;
170        }
171    }
172    mCache->removeItem(resource);
173    delete ref;
174}
175
176}; // namespace uirenderer
177}; // namespace android
178