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Side by Side Diff: src/gpu/effects/GrTextureStripAtlas.h

Issue 1316233002: Style Change: NULL->nullptr (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: 2015-08-27 (Thursday) 10:25:06 EDT Created 5 years, 3 months ago
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1 /* 1 /*
2 * Copyright 2012 Google Inc. 2 * Copyright 2012 Google Inc.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license that can be 4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file. 5 * found in the LICENSE file.
6 */ 6 */
7 7
8 #ifndef GrTextureStripAtlas_DEFINED 8 #ifndef GrTextureStripAtlas_DEFINED
9 #define GrTextureStripAtlas_DEFINED 9 #define GrTextureStripAtlas_DEFINED
10 10
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76 private: 76 private:
77 77
78 // Key to indicate an atlas row without any meaningful data stored in it 78 // Key to indicate an atlas row without any meaningful data stored in it
79 const static uint32_t kEmptyAtlasRowKey = 0xffffffff; 79 const static uint32_t kEmptyAtlasRowKey = 0xffffffff;
80 80
81 /** 81 /**
82 * The state of a single row in our cache, next/prev pointers allow these to be chained 82 * The state of a single row in our cache, next/prev pointers allow these to be chained
83 * together to represent LRU status 83 * together to represent LRU status
84 */ 84 */
85 struct AtlasRow : SkNoncopyable { 85 struct AtlasRow : SkNoncopyable {
86 AtlasRow() : fKey(kEmptyAtlasRowKey), fLocks(0), fNext(NULL), fPrev(NULL ) { } 86 AtlasRow() : fKey(kEmptyAtlasRowKey), fLocks(0), fNext(nullptr), fPrev(n ullptr) { }
87 // GenerationID of the bitmap that is represented by this row, 0xfffffff f means "empty" 87 // GenerationID of the bitmap that is represented by this row, 0xfffffff f means "empty"
88 uint32_t fKey; 88 uint32_t fKey;
89 // How many times this has been locked (0 == unlocked) 89 // How many times this has been locked (0 == unlocked)
90 int32_t fLocks; 90 int32_t fLocks;
91 // We maintain an LRU linked list between unlocked nodes with these poin ters 91 // We maintain an LRU linked list between unlocked nodes with these poin ters
92 AtlasRow* fNext; 92 AtlasRow* fNext;
93 AtlasRow* fPrev; 93 AtlasRow* fPrev;
94 }; 94 };
95 95
96 /** 96 /**
97 * We'll only allow construction via the static GrTextureStripAtlas::GetAtla s 97 * We'll only allow construction via the static GrTextureStripAtlas::GetAtla s
98 */ 98 */
99 GrTextureStripAtlas(Desc desc); 99 GrTextureStripAtlas(Desc desc);
100 100
101 void lockTexture(); 101 void lockTexture();
102 void unlockTexture(); 102 void unlockTexture();
103 103
104 /** 104 /**
105 * Initialize our LRU list (if one already exists, clear it and start anew) 105 * Initialize our LRU list (if one already exists, clear it and start anew)
106 */ 106 */
107 void initLRU(); 107 void initLRU();
108 108
109 /** 109 /**
110 * Grabs the least recently used free row out of the LRU list, returns NULL if no rows are free. 110 * Grabs the least recently used free row out of the LRU list, returns nullp tr if no rows are free.
111 */ 111 */
112 AtlasRow* getLRU(); 112 AtlasRow* getLRU();
113 113
114 void appendLRU(AtlasRow* row); 114 void appendLRU(AtlasRow* row);
115 void removeFromLRU(AtlasRow* row); 115 void removeFromLRU(AtlasRow* row);
116 116
117 /** 117 /**
118 * Searches the key table for a key and returns the index if found; if not f ound, it returns 118 * Searches the key table for a key and returns the index if found; if not f ound, it returns
119 * the bitwise not of the index at which we could insert the key to maintain a sorted list. 119 * the bitwise not of the index at which we could insert the key to maintain a sorted list.
120 **/ 120 **/
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138 static void CleanUp(const GrContext* context, void* info); 138 static void CleanUp(const GrContext* context, void* info);
139 139
140 // Hash table entry for atlases 140 // Hash table entry for atlases
141 class AtlasEntry : public ::SkNoncopyable { 141 class AtlasEntry : public ::SkNoncopyable {
142 public: 142 public:
143 // for SkTDynamicHash 143 // for SkTDynamicHash
144 static const Desc& GetKey(const AtlasEntry& entry) { return entry.fDesc; } 144 static const Desc& GetKey(const AtlasEntry& entry) { return entry.fDesc; }
145 static uint32_t Hash(const Desc& desc) { return SkChecksum::Murmur3(&des c, sizeof(Desc)); } 145 static uint32_t Hash(const Desc& desc) { return SkChecksum::Murmur3(&des c, sizeof(Desc)); }
146 146
147 // AtlasEntry proper 147 // AtlasEntry proper
148 AtlasEntry() : fAtlas(NULL) {} 148 AtlasEntry() : fAtlas(nullptr) {}
149 ~AtlasEntry() { delete fAtlas; } 149 ~AtlasEntry() { delete fAtlas; }
150 Desc fDesc; 150 Desc fDesc;
151 GrTextureStripAtlas* fAtlas; 151 GrTextureStripAtlas* fAtlas;
152 }; 152 };
153 153
154 class Hash; 154 class Hash;
155 static Hash* gAtlasCache; 155 static Hash* gAtlasCache;
156 156
157 static Hash* GetCache(); 157 static Hash* GetCache();
158 158
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180 // Head and tail for linked list of least-recently-used rows (front = least recently used). 180 // Head and tail for linked list of least-recently-used rows (front = least recently used).
181 // Note that when a texture is locked, it gets removed from this list until it is unlocked. 181 // Note that when a texture is locked, it gets removed from this list until it is unlocked.
182 AtlasRow* fLRUFront; 182 AtlasRow* fLRUFront;
183 AtlasRow* fLRUBack; 183 AtlasRow* fLRUBack;
184 184
185 // A list of pointers to AtlasRows that currently contain cached images, sor ted by key 185 // A list of pointers to AtlasRows that currently contain cached images, sor ted by key
186 SkTDArray<AtlasRow*> fKeyTable; 186 SkTDArray<AtlasRow*> fKeyTable;
187 }; 187 };
188 188
189 #endif 189 #endif
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