diff options
Diffstat (limited to 'src/quick/scenegraph')
| -rw-r--r-- | src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h b/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h index f87dd75c8c..8364ce455f 100644 --- a/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h +++ b/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h @@ -100,6 +100,7 @@ template <typename Type, int PageSize> class Allocator { public: Allocator() + : m_freePage(0) { pages.push_back(new AllocatorPage<Type, PageSize>()); } @@ -112,14 +113,21 @@ public: Type *allocate() { AllocatorPage<Type, PageSize> *p = 0; - for (int i=0; i<pages.size(); ++i) { + for (int i = m_freePage; i < pages.size(); i++) { if (pages.at(i)->available > 0) { p = pages.at(i); + m_freePage = i; break; } } + + // we couldn't find a free page from m_freePage to the last page. + // either there is no free pages, or there weren't any in the area we + // scanned: rescanning is expensive, so let's just assume there isn't + // one. when an item is released, we'll reset m_freePage anyway. if (!p) { p = new AllocatorPage<Type, PageSize>(); + m_freePage = pages.count(); pages.push_back(p); } uint pos = p->blocks[PageSize - p->available]; @@ -151,6 +159,9 @@ public: delete page; page = pages.back(); } + + // Reset the free page to force a scan for a new free point. + m_freePage = 0; } void release(Type *t) @@ -172,6 +183,7 @@ public: } QVector<AllocatorPage<Type, PageSize> *> pages; + int m_freePage; }; |