From 20d28e80a5c861a9d5f449ea911ab75b4f37ad0d Mon Sep 17 00:00:00 2001 From: Jef Date: Tue, 24 Sep 2024 14:54:57 +0200 Subject: Initial community commit --- Src/Wasabi/bfc/std_math.cpp | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 Src/Wasabi/bfc/std_math.cpp (limited to 'Src/Wasabi/bfc/std_math.cpp') diff --git a/Src/Wasabi/bfc/std_math.cpp b/Src/Wasabi/bfc/std_math.cpp new file mode 100644 index 00000000..9bbfe112 --- /dev/null +++ b/Src/Wasabi/bfc/std_math.cpp @@ -0,0 +1,18 @@ +#include "precomp_wasabi_bfc.h" + +#include "std_math.h" + + +void premultiplyARGB32(ARGB32 *words, int nwords) +{ + for (; nwords > 0; nwords--, words++) + { + unsigned char *pixel = (unsigned char *)words; + unsigned int alpha = pixel[3]; + if (alpha == 255) continue; + pixel[0] = (pixel[0] * alpha) >> 8; // blue + pixel[1] = (pixel[1] * alpha) >> 8; // green + pixel[2] = (pixel[2] * alpha) >> 8; // red + } +} + -- cgit