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 #define LOG_TAG "OpenGLRenderer"
18
19 #include <utils/threads.h>
20
21 #include "PathCache.h"
22 #include "Properties.h"
23
24 namespace android {
25 namespace uirenderer {
26
27 // Defined in ShapeCache.h
28
computePathBounds(const SkPath * path,const SkPaint * paint,float & left,float & top,float & offset,uint32_t & width,uint32_t & height)29 void computePathBounds(const SkPath* path, const SkPaint* paint,
30 float& left, float& top, float& offset, uint32_t& width, uint32_t& height) {
31 const SkRect& bounds = path->getBounds();
32 computeBounds(bounds, paint, left, top, offset, width, height);
33 }
34
computeBounds(const SkRect & bounds,const SkPaint * paint,float & left,float & top,float & offset,uint32_t & width,uint32_t & height)35 void computeBounds(const SkRect& bounds, const SkPaint* paint,
36 float& left, float& top, float& offset, uint32_t& width, uint32_t& height) {
37 const float pathWidth = fmax(bounds.width(), 1.0f);
38 const float pathHeight = fmax(bounds.height(), 1.0f);
39
40 left = bounds.fLeft;
41 top = bounds.fTop;
42
43 offset = (int) floorf(fmax(paint->getStrokeWidth(), 1.0f) * 1.5f + 0.5f);
44
45 width = uint32_t(pathWidth + offset * 2.0 + 0.5);
46 height = uint32_t(pathHeight + offset * 2.0 + 0.5);
47 }
48
49 ///////////////////////////////////////////////////////////////////////////////
50 // Path cache
51 ///////////////////////////////////////////////////////////////////////////////
52
PathCache()53 PathCache::PathCache(): ShapeCache<PathCacheEntry>("path",
54 PROPERTY_PATH_CACHE_SIZE, DEFAULT_PATH_CACHE_SIZE) {
55 }
56
remove(SkPath * path)57 void PathCache::remove(SkPath* path) {
58 // TODO: Linear search...
59 Vector<size_t> pathsToRemove;
60 for (size_t i = 0; i < mCache.size(); i++) {
61 if (mCache.getKeyAt(i).path == path) {
62 pathsToRemove.push(i);
63 removeTexture(mCache.getValueAt(i));
64 }
65 }
66
67 mCache.setOnEntryRemovedListener(NULL);
68 for (size_t i = 0; i < pathsToRemove.size(); i++) {
69 // This will work because pathsToRemove is sorted
70 // and because the cache is a sorted keyed vector
71 mCache.removeAt(pathsToRemove.itemAt(i) - i);
72 }
73 mCache.setOnEntryRemovedListener(this);
74 }
75
removeDeferred(SkPath * path)76 void PathCache::removeDeferred(SkPath* path) {
77 Mutex::Autolock _l(mLock);
78 mGarbage.push(path);
79 }
80
clearGarbage()81 void PathCache::clearGarbage() {
82 Mutex::Autolock _l(mLock);
83 size_t count = mGarbage.size();
84 for (size_t i = 0; i < count; i++) {
85 remove(mGarbage.itemAt(i));
86 }
87 mGarbage.clear();
88 }
89
get(SkPath * path,SkPaint * paint)90 PathTexture* PathCache::get(SkPath* path, SkPaint* paint) {
91 const SkPath* sourcePath = path->getSourcePath();
92 if (sourcePath && sourcePath->getGenerationID() == path->getGenerationID()) {
93 path = const_cast<SkPath*>(sourcePath);
94 }
95
96 PathCacheEntry entry(path, paint);
97 PathTexture* texture = mCache.get(entry);
98
99 float left, top, offset;
100 uint32_t width, height;
101
102 if (!texture) {
103 texture = addTexture(entry, path, paint);
104 } else if (path->getGenerationID() != texture->generation) {
105 mCache.remove(entry);
106 texture = addTexture(entry, path, paint);
107 }
108
109 return texture;
110 }
111
112 }; // namespace uirenderer
113 }; // namespace android
114