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1 /* | 1 /* |
2 * Copyright 2016 Google Inc. | 2 * Copyright 2016 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 GrSurfaceProxy_DEFINED | 8 #ifndef GrSurfaceProxy_DEFINED |
9 #define GrSurfaceProxy_DEFINED | 9 #define GrSurfaceProxy_DEFINED |
10 | 10 |
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43 if (!(--fRefCnt)) { | 43 if (!(--fRefCnt)) { |
44 delete this; | 44 delete this; |
45 return; | 45 return; |
46 } | 46 } |
47 | 47 |
48 this->validate(); | 48 this->validate(); |
49 } | 49 } |
50 | 50 |
51 void validate() const { | 51 void validate() const { |
52 #ifdef SK_DEBUG | 52 #ifdef SK_DEBUG |
53 SkASSERT(fRefCnt >= 0); | 53 SkASSERT(fRefCnt >= 1); |
| 54 SkASSERT(fPendingReads >= 0); |
| 55 SkASSERT(fPendingWrites >= 0); |
| 56 SkASSERT(fRefCnt + fPendingReads + fPendingWrites >= 1); |
| 57 |
| 58 if (fTarget) { |
| 59 SkASSERT(!fPendingReads && !fPendingWrites); |
| 60 // The backing GrSurface can have more refs than the proxy if the pr
oxy |
| 61 // started off wrapping an external resource (that came in with refs
). |
| 62 // The GrSurface should never have fewer refs than the proxy however
. |
| 63 SkASSERT(fTarget->fRefCnt >= fRefCnt); |
| 64 } |
54 #endif | 65 #endif |
55 } | 66 } |
56 | 67 |
| 68 int32_t getProxyRefCnt_TestOnly() const; |
| 69 int32_t getBackingRefCnt_TestOnly() const; |
| 70 int32_t getPendingReadCnt_TestOnly() const; |
| 71 int32_t getPendingWriteCnt_TestOnly() const; |
| 72 |
57 protected: | 73 protected: |
58 GrIORefProxy() : fRefCnt(1), fTarget(nullptr) {} | 74 GrIORefProxy() : fTarget(nullptr), fRefCnt(1), fPendingReads(0), fPendingWri
tes(0) {} |
59 GrIORefProxy(sk_sp<GrSurface> surface) : fRefCnt(1) { | 75 GrIORefProxy(sk_sp<GrSurface> surface) : fRefCnt(1), fPendingReads(0), fPend
ingWrites(0) { |
60 // Since we're manually forwarding on refs & unrefs we don't want sk_sp
doing | 76 // Since we're manually forwarding on refs & unrefs we don't want sk_sp
doing |
61 // anything extra. | 77 // anything extra. |
62 fTarget = surface.release(); | 78 fTarget = surface.release(); |
63 } | 79 } |
64 virtual ~GrIORefProxy() { | 80 virtual ~GrIORefProxy() { |
65 // We don't unref 'fTarget' here since the 'unref' method will already | 81 // We don't unref 'fTarget' here since the 'unref' method will already |
66 // have forwarded on the unref call that got use here. | 82 // have forwarded on the unref call that got use here. |
67 } | 83 } |
68 | 84 |
69 // TODO: add the IO ref counts. Although if we can delay shader creation to
flush time | 85 // This GrIORefProxy was deferred before but has just been instantiated. To |
70 // we may not even need to do that. | 86 // make all the reffing & unreffing work out we now need to transfer any def
erred |
71 mutable int32_t fRefCnt; | 87 // refs & unrefs to the new GrSurface |
| 88 void transferRefs() { |
| 89 SkASSERT(fTarget); |
| 90 |
| 91 fTarget->fRefCnt += (fRefCnt-1); // don't xfer the proxy's creation ref |
| 92 fTarget->fPendingReads += fPendingReads; |
| 93 fTarget->fPendingWrites += fPendingWrites; |
| 94 |
| 95 fPendingReads = 0; |
| 96 fPendingWrites = 0; |
| 97 } |
72 | 98 |
73 // For deferred proxies this will be null. For wrapped proxies it will point
to the | 99 // For deferred proxies this will be null. For wrapped proxies it will point
to the |
74 // wrapped resource. | 100 // wrapped resource. |
75 GrSurface* fTarget; | 101 GrSurface* fTarget; |
| 102 |
| 103 private: |
| 104 // This class is used to manage conversion of refs to pending reads/writes. |
| 105 friend class GrGpuResourceRef; |
| 106 template <typename, GrIOType> friend class GrPendingIOResource; |
| 107 |
| 108 void addPendingRead() const { |
| 109 this->validate(); |
| 110 |
| 111 if (fTarget) { |
| 112 fTarget->addPendingRead(); |
| 113 return; |
| 114 } |
| 115 |
| 116 ++fPendingReads; |
| 117 } |
| 118 |
| 119 void completedRead() const { |
| 120 this->validate(); |
| 121 |
| 122 if (fTarget) { |
| 123 fTarget->completedRead(); |
| 124 return; |
| 125 } |
| 126 |
| 127 SkFAIL("How was the read completed if the Proxy hasn't been instantiated
?"); |
| 128 } |
| 129 |
| 130 void addPendingWrite() const { |
| 131 this->validate(); |
| 132 |
| 133 if (fTarget) { |
| 134 fTarget->addPendingWrite(); |
| 135 return; |
| 136 } |
| 137 |
| 138 ++fPendingWrites; |
| 139 } |
| 140 |
| 141 void completedWrite() const { |
| 142 this->validate(); |
| 143 |
| 144 if (fTarget) { |
| 145 fTarget->completedWrite(); |
| 146 return; |
| 147 } |
| 148 |
| 149 SkFAIL("How was the write completed if the Proxy hasn't been instantiate
d?"); |
| 150 } |
| 151 |
| 152 mutable int32_t fRefCnt; |
| 153 mutable int32_t fPendingReads; |
| 154 mutable int32_t fPendingWrites; |
76 }; | 155 }; |
77 | 156 |
78 class GrSurfaceProxy : public GrIORefProxy { | 157 class GrSurfaceProxy : public GrIORefProxy { |
79 public: | 158 public: |
80 static sk_sp<GrSurfaceProxy> MakeWrapped(sk_sp<GrSurface>); | 159 static sk_sp<GrSurfaceProxy> MakeWrapped(sk_sp<GrSurface>); |
81 | 160 |
82 static sk_sp<GrSurfaceProxy> MakeDeferred(const GrCaps&, const GrSurfaceDesc
&, | 161 static sk_sp<GrSurfaceProxy> MakeDeferred(const GrCaps&, const GrSurfaceDesc
&, |
83 SkBackingFit, SkBudgeted); | 162 SkBackingFit, SkBudgeted); |
84 | 163 |
85 // TODO: need to refine ownership semantics of 'srcData' if we're in complet
ely | 164 // TODO: need to refine ownership semantics of 'srcData' if we're in complet
ely |
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222 // This back-pointer is required so that we can add a dependancy between | 301 // This back-pointer is required so that we can add a dependancy between |
223 // the opList used to create the current contents of this surface | 302 // the opList used to create the current contents of this surface |
224 // and the opList of a destination surface to which this one is being drawn
or copied. | 303 // and the opList of a destination surface to which this one is being drawn
or copied. |
225 GrOpList* fLastOpList; | 304 GrOpList* fLastOpList; |
226 | 305 |
227 | 306 |
228 typedef GrIORefProxy INHERITED; | 307 typedef GrIORefProxy INHERITED; |
229 }; | 308 }; |
230 | 309 |
231 #endif | 310 #endif |
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