Posted on 2010-08-11 15:54
S.l.e!ep.￠% 閱讀(951)
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VC 、
DirectUI
void CSemiTransWnd::Update(long type,POINT *pTopLeft)
{????
if(m_hWnd&&m_iWidth&&m_iHeight&&m_pdwRGBAData&&m_pDC&&m_pBmp)//指針正確????
{???????? //獲取屏幕DC????????
?? CDC dcScreen;????????
?? dcScreen.Attach(::GetDC(NULL));???????? //處理Alpha 通道????????
?? DealAlphaChannel();????????
?? CRect rectDlg;????????
?? GetWindowRect(m_hWnd,&rectDlg);????????
?? CPoint ptWindowScreenPosition(rectDlg.TopLeft());????????
?? if(pTopLeft)????????
?? {????????????
??? ptWindowScreenPosition.x=pTopLeft->x;????????????
??? ptWindowScreenPosition.y=pTopLeft->y;????????
?? }???????? //刷新到屏幕上????????
?? CSize szWindow(m_iWidth, m_iHeight);????????
?? CPoint ptSrc(0,0);????????
?? int alpha;????????
?? switch(type)????????
?? {????????
?? case 2: //淡出????????????
??? for(alpha=m_iWndSemiTransAlpha;alpha>=0;alpha--)??????
{????????????????
???? BLENDFUNCTION blendPixelFunction= { AC_SRC_OVER, 0, alpha,AC_SRC_ALPHA };????????????????
??? UpdateLayeredWindow(m_hWnd, dcScreen, &ptWindowScreenPosition, &szWindow, *m_pDC,&ptSrc, 0, &blendPixelFunction, ULW_ALPHA);????????????
??? }????????????
??? break;????????
?? case 1: //淡入????????????
??? for(alpha=0;alpha<=m_iWndSemiTransAlpha;alpha++)???????????
??? {????????????????
???? BLENDFUNCTION blendPixelFunction= { AC_SRC_OVER, 0, alpha,AC_SRC_ALPHA };????????????????
???? UpdateLayeredWindow(m_hWnd, dcScreen, &ptWindowScreenPosition, &szWindow, *m_pDC,&ptSrc, 0, &blendPixelFunction, ULW_ALPHA);????????????
??? }????????????
??? break;????????
?? case 0: //直接刷新????????
?? default:????????????
??? BLENDFUNCTION blendPixelFunction= { AC_SRC_OVER, 0, m_iWndSemiTransAlpha,AC_SRC_ALPHA };???????????
??? UpdateLayeredWindow(m_hWnd, dcScreen, &ptWindowScreenPosition, &szWindow, *m_pDC,&ptSrc, 0, &blendPixelFunction, ULW_ALPHA);????????????
??? break;????????
}????
}//end if } 空 氣 15:12:25 //??? 處理Alpha通道 處理用戶繪制部分的不透明度
void CSemiTransWnd::DealAlphaChannel(void)
{????
if(m_pdwRGBAData&&m_pBmp) //指針正確????
{???????? if(m_bSemiTransAlphaUpdate||m_bTransAlphaUpdate)//需要處理Alpha????????
{???????????? //獲取位圖數(shù)據(jù)????????????
?? BITMAP bmpInfo;????????????
?? m_pBmp->GetBitmap(&bmpInfo);????????????
?? BYTE??????? *rgba??? = (BYTE*)bmpInfo.bmBits;????????????
?? BYTE??????? *rgbb??? = (BYTE*)m_pdwRGBAData;????????????????????
?? long??????? i;????????????
?? for(i=0;i<bmpInfo.bmHeight*bmpInfo.bmWidth;i++)????????????
?? {????????????????
??? if(rgba[0]!=rgbb[0]||rgba[1]!=rgbb[1]||rgba[2]!=rgbb[2]) //顏色不同???????????????
??? {????????????????????
???? if((rgbb[3] == 0x00 && m_bTransAlphaUpdate)|| //透明Alpha值更新???????????????????????
????? (rgbb[3] != 0x00 && m_bSemiTransAlphaUpdate)) //半透明 Alpha值更新????????????????????
???? { //???????????????????????
????? rgba[3]=0xFF;????????????????????
???? }????????????????????
???? rgba+=4;????????????????????
???? rgbb+=4;????????????????
??? }????????????
?? }????????
}????
}
}