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util: Add is_pot() method to formats.

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José Fonseca 2010-02-26 10:11:36 +00:00
parent 0c20b30333
commit e2b02ea9db
1 changed files with 7 additions and 0 deletions
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7
src/gallium/auxiliary/util/u_format_parse.py
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@ -37,6 +37,10 @@ SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W, SWIZZLE_0, SWIZZLE_1, SWIZZLE_NONE,
PLAIN = 'plain' PLAIN = 'plain'
def is_pot(x):
return (x & (x - 1)) == 0;
class Type: class Type:
'''Describe the type of a color channel.''' '''Describe the type of a color channel.'''
@ -113,6 +117,9 @@ class Format:
return True return True
return False return False
def is_pot(self):
return is_pot(self.block_size())
def stride(self): def stride(self):
return self.block_size()/8 return self.block_size()/8