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Decrease SkClipStack memory allocations & deallocations

Browse Source 
http://codereview.appspot.com/6443138



git-svn-id: http://skia.googlecode.com/svn/trunk@5151 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
robertphillips@google.com 2012-08-17 14:25:43 +00:00
parent 07ea2db026
commit f9a9084782
1 changed files with 10 additions and 4 deletions
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14
src/core/SkClipStack.cpp
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@ -439,18 +439,24 @@ struct SkClipStack::Rec {
}
};
// This constant determines how many Rec's are allocated together as a block in
// the deque. As such it needs to balance allocating too much memory vs.
// incurring allocation/deallocation thrashing. It should roughly correspond to
// the deepest save/restore stack we expect to see.
static const int kDefaultRecordAllocCnt = 8;
SkClipStack::SkClipStack()
: fDeque(sizeof(Rec))
: fDeque(sizeof(Rec), kDefaultRecordAllocCnt)
, fSaveCount(0) {
}
SkClipStack::SkClipStack(const SkClipStack& b) : fDeque(sizeof(Rec)) {
SkClipStack::SkClipStack(const SkClipStack& b)
: fDeque(sizeof(Rec), kDefaultRecordAllocCnt) {
*this = b;
}
SkClipStack::SkClipStack(const SkRect& r)
: fDeque(sizeof(Rec))
: fDeque(sizeof(Rec), kDefaultRecordAllocCnt)
, fSaveCount(0) {
if (!r.isEmpty()) {
this->clipDevRect(r, SkRegion::kReplace_Op, false);
@ -458,7 +464,7 @@ SkClipStack::SkClipStack(const SkRect& r)
}
SkClipStack::SkClipStack(const SkIRect& r)
: fDeque(sizeof(Rec))
: fDeque(sizeof(Rec), kDefaultRecordAllocCnt)
, fSaveCount(0) {
if (!r.isEmpty()) {
SkRect temp;