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| author |  commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-07-17 21:39:28 +0000 |
|---|---|---|
| committer | commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-07-17 21:39:28 +0000 |
| commit | 5dd567c2a55c16c8bc2668902cdfce1734dfae8f (patch) | |
| tree | b97bb6c3a6fce526e0a69eb82053e64c9b8b4668 /src/core/SkRegion.cpp | |
| parent | a308883003e36cbff4d1c4c2d2e7fceb3eea95b1 (diff) | |
Add getRectCount to SkRegtion
It is useful to know how many rects comprise a region,
since in some situations we can optimize code based on
the complexity of the region. For instance, if we use
SkRegion for tracking invalidation we might opt to use
the region bounds as invalidation instead of iterating
over each rect.
R=reed@google.com, tomhudson@chromium.org, caryclark@google.com, robertphillips@google.com
Author: vmpstr@chromium.org
Review URL: https://chromiumcodereview.appspot.com/19366008
git-svn-id: http://skia.googlecode.com/svn/trunk@10129 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'src/core/SkRegion.cpp')
| -rw-r--r-- | src/core/SkRegion.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/core/SkRegion.cpp b/src/core/SkRegion.cpp index 09550571e6..acc530a94d 100644 --- a/src/core/SkRegion.cpp +++ b/src/core/SkRegion.cpp @@ -124,6 +124,15 @@ void SkRegion::swap(SkRegion& other) { SkTSwap<RunHead*>(fRunHead, other.fRunHead); } +int SkRegion::computeRegionComplexity() const { + if (this->isEmpty()) { + return 0; + } else if (this->isRect()) { + return 1; + } + return fRunHead->getIntervalCount(); +} + bool SkRegion::setEmpty() { this->freeRuns(); fBounds.set(0, 0, 0, 0); |