winamp/Src/Wasabi/api/wnd/blending.cpp

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2024-09-24 12:54:57 +00:00
#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];