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// https://github.com/WebKit/webkit/blob/e0e7e8f907f4c01c723374e8230a63d46e89e6a0/Source/WebCore/platform/graphics/filters/FEComposite.cpp#L98
static unsigned char clampByte(int c)
{
unsigned char buff[] = { static_cast<unsigned char>(c), 255, 0 };
unsigned uc = static_cast<unsigned>(c);
return buff[!!(uc & ~0xff) + !!(uc & ~(~0u >> 1))];
}
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https://github.com/WebKit/webkit/commit/5bec6fe272396b07db853f0672fe4b0348e465f7
Patch by Said Abou-Hallawa <sabouhallawa@apple,com> on 2016-04-08
Reviewed by Oliver Hunt.
Ensure the FEComposite arithmetic filter is clamping the resulted color
components in a constant time.
да хз, индифферентно. Не помню чтоб мне было там противно или наоборот хорошо