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Improved memory allocation efficiency of the 3D path preview generator.

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This commit is contained in:
bubnikv 2017-03-28 17:09:57 +02:00
parent 1fb302d480
commit 3ebf0ce7fd
3 changed files with 59 additions and 41 deletions
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27
xs/src/libslic3r/Utils.hpp
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@ -6,6 +6,33 @@ namespace Slic3r {
extern void set_logging_level(unsigned int level);
extern void trace(unsigned int level, const char *message);
// Compute the next highest power of 2 of 32-bit v
// http://graphics.stanford.edu/~seander/bithacks.html
inline uint32_t next_highest_power_of_2(uint32_t v)
{
if (v != 0)
-- v;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
return ++ v;
}
inline uint64_t next_highest_power_of_2(uint64_t v)
{
if (v != 0)
-- v;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v |= v >> 32;
return ++ v;
}
} // namespace Slic3r
#endif // slic3r_Utils_hpp_