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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2012 Google Inc. | 3 * Copyright 2012 Google Inc. |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #ifndef SkColorTable_DEFINED | 10 #ifndef SkColorTable_DEFINED |
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23 public: | 23 public: |
24 SK_DECLARE_INST_COUNT(SkColorTable) | 24 SK_DECLARE_INST_COUNT(SkColorTable) |
25 | 25 |
26 /** Makes a deep copy of colors. | 26 /** Makes a deep copy of colors. |
27 */ | 27 */ |
28 SkColorTable(const SkColorTable& src); | 28 SkColorTable(const SkColorTable& src); |
29 SkColorTable(const SkPMColor colors[], int count); | 29 SkColorTable(const SkPMColor colors[], int count); |
30 virtual ~SkColorTable(); | 30 virtual ~SkColorTable(); |
31 | 31 |
32 /** Returns the number of colors in the table. | 32 /** Returns the number of colors in the table. |
33 */ | 33 */ |
34 int count() const { return fCount; } | 34 int count() const { return fCount; } |
35 | 35 |
36 /** Returns the specified color from the table. In the debug build, this ass
erts that | 36 /** Returns the specified color from the table. In the debug build, this ass
erts that |
37 the index is in range (0 <= index < count). | 37 * the index is in range (0 <= index < count). |
38 */ | 38 */ |
39 SkPMColor operator[](int index) const { | 39 SkPMColor operator[](int index) const { |
40 SkASSERT(fColors != NULL && (unsigned)index < (unsigned)fCount); | 40 SkASSERT(fColors != NULL && (unsigned)index < (unsigned)fCount); |
41 return fColors[index]; | 41 return fColors[index]; |
42 } | 42 } |
43 | 43 |
44 /** | 44 // TODO: Would making the read() methods const allow us to avoid copies? |
45 * Return the array of colors for reading. This must be balanced by a call | 45 |
46 * to unlockColors(). | 46 /** Return the array of colors for reading. |
47 */ | 47 */ |
48 const SkPMColor* lockColors() { | 48 const SkPMColor* readColors() { return fColors; } |
49 SkDEBUGCODE(sk_atomic_inc(&fColorLockCount);) | |
50 return fColors; | |
51 } | |
52 | 49 |
53 /** | 50 /** read16BitCache() returns the array of RGB16 colors that mirror the 32bit
colors. |
54 * Balancing call to lockColors(). | |
55 */ | 51 */ |
56 void unlockColors(); | 52 const uint16_t* read16BitCache(); |
57 | |
58 /** Similar to lockColors(), lock16BitCache() returns the array of | |
59 RGB16 colors that mirror the 32bit colors. However, this function | |
60 will return null if kColorsAreOpaque_Flag is not set. | |
61 Also, unlike lockColors(), the returned array here cannot be modified. | |
62 */ | |
63 const uint16_t* lock16BitCache(); | |
64 /** Balancing call to lock16BitCache(). | |
65 */ | |
66 void unlock16BitCache() { | |
67 SkASSERT(f16BitCacheLockCount > 0); | |
68 SkDEBUGCODE(sk_atomic_dec(&f16BitCacheLockCount);) | |
69 } | |
70 | 53 |
71 explicit SkColorTable(SkReadBuffer&); | 54 explicit SkColorTable(SkReadBuffer&); |
72 void writeToBuffer(SkWriteBuffer&) const; | 55 void writeToBuffer(SkWriteBuffer&) const; |
73 | 56 |
74 private: | 57 private: |
75 SkPMColor* fColors; | 58 SkPMColor* fColors; |
76 uint16_t* f16BitCache; | 59 uint16_t* f16BitCache; |
77 int fCount; | 60 int fCount; |
78 SkDEBUGCODE(int fColorLockCount;) | |
79 SkDEBUGCODE(int f16BitCacheLockCount;) | |
80 | 61 |
81 void init(const SkPMColor* colors, int count); | 62 void init(const SkPMColor* colors, int count); |
82 | 63 |
83 void inval16BitCache(); | |
84 | |
85 typedef SkRefCnt INHERITED; | 64 typedef SkRefCnt INHERITED; |
86 }; | 65 }; |
87 | 66 |
88 #endif | 67 #endif |
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