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