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Bug 1028121 - Use MFBT RoundUpPow2 in WebGLElementArrayCache - r=jgilbert

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This commit is contained in:
Benoit Jacob 2014-06-21 00:09:50 -04:00
parent 5a3aa8f5da
commit d5312c6085
1 changed files with 2 additions and 11 deletions
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13
content/canvas/src/WebGLElementArrayCache.cpp
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@ -7,6 +7,7 @@
#include "mozilla/Assertions.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/MathAlgorithms.h"
#include <cstdlib>
#include <cstring>
@ -293,16 +294,6 @@ public:
}
}
template<typename U>
static U NextPowerOfTwo(U x) {
U result = 1;
while (result < x)
result <<= 1;
MOZ_ASSERT(result >= x);
MOZ_ASSERT((result & (result - 1)) == 0);
return result;
}
// Updates the tree from the parent's buffer contents. Fallible, as it
// may have to resize the tree storage.
bool Update(size_t firstByte, size_t lastByte);
@ -365,7 +356,7 @@ bool WebGLElementArrayCacheTree<T>::Update(size_t firstByte, size_t lastByte)
// is as follows:
size_t numLeavesNonPOT = (numberOfElements + sElementsPerLeaf - 1) / sElementsPerLeaf;
// It only remains to round that up to the next power of two:
requiredNumLeaves = NextPowerOfTwo(numLeavesNonPOT);
requiredNumLeaves = RoundUpPow2(numLeavesNonPOT);
}
// Step #0: if needed, resize our tree data storage.