www.pudn.com > mmxswarm.zip > SSE2Surface32.cpp

// SSE2Surface32.cpp : implementation of the CSSE2Surface32Intrinsic 
// class 
// 
// This is a part of the Microsoft Foundation Classes C++ library. 
// Copyright (c) Microsoft Corporation.  All rights reserved. 
// 
// This source code is only intended as a supplement to the 
// Microsoft Foundation Classes Reference and related 
// electronic documentation provided with the library. 
// See these sources for detailed information regarding the 
// Microsoft Foundation Classes product. 
// 
#include "stdafx.h" 
#include "SSE2Surface.h" 
#include "SSE2Wrapper.h" 
 
typedef CSSE2Unsigned16Saturated CSSE2; 
 
// Optimized for a 4-pixel processing 32 bit buffer 
void CSSE2Surface32Intrinsic::AdjustWidth(int *pWidth) 
{ 
	ASSERT(pWidth != NULL); 
	ASSERT(m_kDeltaX <= 3); 
 
	*pWidth = (*pWidth + 3-m_kDeltaX) & ~3; // round up by 4 
} 
 
void CSSE2Surface32Intrinsic::OnCreated() 
{ 
	ASSERT(GetBitDepth() == 32); 
	ASSERT((GetPitch() & 0xF) == 0); 
	ASSERT(GetVisibleWidth() && GetVisibleHeight()); 
	ASSERT(sizeof(RGBQUAD) == 4); 
 
	int width = GetVisibleWidth(); 
    m_qwpl  = GetPitch()/8; // qwords Per Line 
    m_width = (width+3)/4; // 4 pixels at a time 
} 
 
void CSSE2Surface32Intrinsic::BlurBits() 
{ 
    int height = GetVisibleHeight(); 
    ULONGLONG *pCur  = (ULONGLONG *)GetPixelAddress(0,0); 
	ASSERT((DWORD_PTR(pCur) & 0xF) == 0); 
 
	CSSE2 cFader; 
	CSSE2 cRight, cLeft; 
	CSSE2 cUp, cDown, cCur; 
	CSSE2 cResult; 
 
	cFader.UnpackBytesLo( 0x0101010101010101u ); 
	cLeft.Clear(); 
 
	do { 
		int width = m_width; 
		ASSERT((DWORD_PTR(pCur) & 0xF) == 0); 
		do { 
			RGBQUAD *pdwCur = (RGBQUAD*)pCur; 
			ULONGLONG *pNext = (ULONGLONG*)(pdwCur+1); 
 
			// Load pixels and do the mmx unpack 
			cCur.UnpackBytesLo( *pCur ); 
			cRight.UnpackBytesLo( *pNext ); 
			cUp.UnpackBytesLo( pCur[-m_qwpl] ); 
			cDown.UnpackBytesLo( pCur[m_qwpl] ); 
 
			// Actual math. Don't step on current, or right. 
			// Sum the 4 around and double the middle 
			 
			// Do current pixel in this line 
			cResult = (cDown+cUp+cLeft+cRight+(cCur<<2))>>3; 
 
			// Do next pixel 
			cLeft = cRight; 		// Slide left! 
			cCur.UnpackBytesLo( pCur[1] ); 
			cRight.UnpackBytesLo( pNext[1] ); 
			cUp.UnpackBytesLo( pCur[-m_qwpl+1] ); 
			cDown.UnpackBytesLo( pCur[m_qwpl+1] ); 
			cCur = (cDown+cUp+cLeft+cRight+(cCur<<2))>>3; 
 
#if defined(TRIPPY) 
			cCur += cFader; // increase the fade to white 
			cResult += cFader; // increase the fade to white 
#elif defined (FAST_FADE) 
    	    cCur -= cFader; // increase the fade to black 
    	    cResult -= cFader; // increase the fade to black 
#endif 
			cLeft = cRight; 		// Slide left! 
	 
			cResult.PackBytes(pCur, cCur); 
			pCur += 2; 
		} while (--width > 0); 
	} while (--height > 0); 
}