blob: 648643f7a0ffcd28f4caf09d0599af9e90db151b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkRegionPriv_DEFINED
#define SkRegionPriv_DEFINED
#include "SkRegion.h"
#include "SkThread.h"
#define assert_sentinel(value, isSentinel) \
SkASSERT(((value) == SkRegion::kRunTypeSentinel) == isSentinel)
//SkDEBUGCODE(extern int32_t gRgnAllocCounter;)
struct SkRegion::RunHead {
int32_t fRefCnt;
int32_t fRunCount;
static RunHead* Alloc(int count)
{
//SkDEBUGCODE(sk_atomic_inc(&gRgnAllocCounter);)
//SkDEBUGF(("************** gRgnAllocCounter::alloc %d\n", gRgnAllocCounter));
SkASSERT(count >= SkRegion::kRectRegionRuns);
RunHead* head = (RunHead*)sk_malloc_throw(sizeof(RunHead) + count * sizeof(RunType));
head->fRefCnt = 1;
head->fRunCount = count;
return head;
}
bool isComplex() const
{
return this != SkRegion_gEmptyRunHeadPtr && this != SkRegion_gRectRunHeadPtr;
}
SkRegion::RunType* writable_runs()
{
SkASSERT(this->isComplex());
SkASSERT(fRefCnt == 1);
return (SkRegion::RunType*)(this + 1);
}
const SkRegion::RunType* readonly_runs() const
{
SkASSERT(this->isComplex());
return (const SkRegion::RunType*)(this + 1);
}
RunHead* ensureWritable()
{
SkASSERT(this->isComplex());
RunHead* writable = this;
if (fRefCnt > 1)
{
// We need to alloc & copy the current region before we call
// sk_atomic_dec because it could be freed in the meantime,
// otherwise.
writable = Alloc(fRunCount);
memcpy(writable->writable_runs(), this->readonly_runs(),
fRunCount * sizeof(RunType));
// fRefCount might have changed since we last checked.
// If we own the last reference at this point, we need to
// free the memory.
if (sk_atomic_dec(&fRefCnt) == 1)
{
sk_free(this);
}
}
return writable;
}
};
#endif
|
