Initial community commit

Src/Wasabi/api/wnd/blending.cpp

@@ -0,0 +1,56 @@
+#include <precomp.h>
+#include "blending.h"
+#include <bfc/std.h>
+
+#if !defined(WIN32) && !defined(LINUX)
+#error port me!
+#endif
+
+class BlenderInit
+{
+public:
+	BlenderInit() { Blenders::init(); }
+};
+static BlenderInit blender_init;
+
+void Blenders::init()
+{
+	if (!alphatable[127][127])
+	{
+		int i, j;
+		for (j = 0;j < 256;j++)
+			for (i = 0;i < 256;i++)
+				alphatable[i][j] = (i * (j + 1)) >> 8;
+#ifndef NO_MMX
+		DWORD retval1, retval2;
+#ifdef WIN32
+		__try {
+		    _asm {
+		        mov eax, 1  // set up CPUID to return processor version and features
+		        // 0 = vendor string, 1 = version info, 2 = cache info
+		        _emit 0x0f  // code bytes = 0fh,  0a2h
+		        _emit 0xa2
+		        mov retval1, eax
+		        mov retval2, edx
+		    }
+	} __except(EXCEPTION_EXECUTE_HANDLER) { retval1 = retval2 = 0;}
+#else
+		__asm__ volatile ( "movl $1, %%eax\n"
+						   ".byte 15, 162\n"
+						   "movl %%eax, %0\n"
+						   "movl %%edx, %1\n"
+					   : "=m" (retval1), "=m" (retval2)
+								   :   // No inputs...
+								   : "%eax", "%edx" );
+#endif
+		mmx_available = retval1 && (retval2 & 0x800000);
+#endif	//ndef NO_MMX
+
+	}
+}
+
+#ifndef NO_MMX
+int Blenders::mmx_available = 0;
+#endif
+
+unsigned char Blenders::alphatable[256][256];