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| 1 /* libs/corecg/SkRegionPriv.h | |
| 2 ** | |
| 3 ** Copyright 2006, The Android Open Source Project | |
| 4 ** | |
| 5 ** Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 ** you may not use this file except in compliance with the License. | |
| 7 ** You may obtain a copy of the License at | |
| 8 ** | |
| 9 ** http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 ** | |
| 11 ** Unless required by applicable law or agreed to in writing, software | |
| 12 ** distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 ** See the License for the specific language governing permissions and | |
| 15 ** limitations under the License. | |
| 16 */ | |
| 17 | |
| 18 #ifndef SkRegionPriv_DEFINED | |
| 19 #define SkRegionPriv_DEFINED | |
| 20 | |
| 21 #include "SkRegion.h" | |
| 22 #include "SkThread.h" | |
| 23 | |
| 24 #define assert_sentinel(value, isSentinel) \ | |
| 25 SkASSERT(((value) == SkRegion::kRunTypeSentinel) == isSentinel) | |
| 26 | |
| 27 //SkDEBUGCODE(extern int32_t gRgnAllocCounter;) | |
| 28 | |
| 29 struct SkRegion::RunHead { | |
| 30 int32_t fRefCnt; | |
| 31 int32_t fRunCount; | |
| 32 | |
| 33 static RunHead* Alloc(int count) | |
| 34 { | |
| 35 //SkDEBUGCODE(sk_atomic_inc(&gRgnAllocCounter);) | |
| 36 //SkDEBUGF(("************** gRgnAllocCounter::alloc %d\n", gRgnAllocCoun
ter)); | |
| 37 | |
| 38 SkASSERT(count >= SkRegion::kRectRegionRuns); | |
| 39 | |
| 40 RunHead* head = (RunHead*)sk_malloc_throw(sizeof(RunHead) + count * size
of(RunType)); | |
| 41 head->fRefCnt = 1; | |
| 42 head->fRunCount = count; | |
| 43 return head; | |
| 44 } | |
| 45 | |
| 46 bool isComplex() const | |
| 47 { | |
| 48 return this != SkRegion_gEmptyRunHeadPtr && this != SkRegion_gRectRunHea
dPtr; | |
| 49 } | |
| 50 | |
| 51 SkRegion::RunType* writable_runs() | |
| 52 { | |
| 53 SkASSERT(this->isComplex()); | |
| 54 SkASSERT(fRefCnt == 1); | |
| 55 return (SkRegion::RunType*)(this + 1); | |
| 56 } | |
| 57 const SkRegion::RunType* readonly_runs() const | |
| 58 { | |
| 59 SkASSERT(this->isComplex()); | |
| 60 return (const SkRegion::RunType*)(this + 1); | |
| 61 } | |
| 62 | |
| 63 RunHead* ensureWritable() | |
| 64 { | |
| 65 SkASSERT(this->isComplex()); | |
| 66 | |
| 67 RunHead* writable = this; | |
| 68 if (fRefCnt > 1) | |
| 69 { | |
| 70 // We need to alloc & copy the current region before we call | |
| 71 // sk_atomic_dec because it could be freed in the meantime, | |
| 72 // otherwise. | |
| 73 writable = Alloc(fRunCount); | |
| 74 memcpy(writable->writable_runs(), this->readonly_runs(), | |
| 75 fRunCount * sizeof(RunType)); | |
| 76 | |
| 77 // fRefCount might have changed since we last checked. | |
| 78 // If we own the last reference at this point, we need to | |
| 79 // free the memory. | |
| 80 if (sk_atomic_dec(&fRefCnt) == 1) | |
| 81 { | |
| 82 sk_free(this); | |
| 83 } | |
| 84 } | |
| 85 return writable; | |
| 86 } | |
| 87 }; | |
| 88 | |
| 89 #endif | |
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Chromium Code Reviews
Issue 113827:
Remove the remainder of the skia source code from the Chromium repo.... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/