使用Gdi+显示特效文字

 

在DesktopLyricsDemo例子基础上修改

 

实现代码

 

BOOL CGDIAPPDlg::UpdateDisplay(int Transparent){RECT rct;::GetWindowRect(m_hWnd, &rct);int iWinRectW(rct.right - rct.left);int iWinRectH(rct.bottom - rct.top);HDC hdcTemp=GetDC()->m_hDC;m_hdcMemory=CreateCompatibleDC(hdcTemp);//hdcSrcHBITMAP hBitMap=CreateCompatibleBitmap(hdcTemp,iWinRectW,iWinRectH);SelectObject(m_hdcMemory,hBitMap);if(Transparent<0||Transparent>100)Transparent=100;m_Blend.SourceConstantAlpha=int(Transparent*2.55);//1~255//封装一个 GDI+ 绘图图面。无法继承此类。Graphics graphics(m_hdcMemory);//设置此 Graphics 的呈现质量 SmoothingModeAntiAlias 抗锯齿，平滑graphics.SetSmoothingMode(SmoothingModeAntiAlias);//设置此 Graphics 关联的插补模式 InterpolationModeHighQualityBicubic 双立方体graphics.SetInterpolationMode(InterpolationModeHighQualityBicubic);///////////////////////显示矩形边框///////////////////////////////////// if(m_bShowClient) {SolidBrush rectBrush(Color(125,228,228,228)); //填充由一对坐标、一个宽度和一个高度指定的矩形的内部。 graphics.FillRectangle(&rectBrush//确定填充特性的 Brush ,3//要填充的矩形的左上角的 x 坐标 ,5//要填充的矩形的左上角的 y 坐标 ,iWinRectW-2//要填充的矩形的宽度 ,iWinRectH-2//要填充的矩形的高度 );Pen pen1(Color(255,223,223,223));Pen pen2(Color(255,223,223,223)); //绘制由坐标对、宽度和高度指定的矩形。 graphics.DrawRectangle(&pen1,2,6,iWinRectW-1,iWinRectW-1); // graphics.DrawRectangle(&pen2,1,5,iWinRectW+1,iWinRectW+1);}//////////////////////显示png////////////////////////////////////// Image image(L"ni_png_0120.png");if(m_bShowImg){ int iImgX(10); int iImgY(10); int iImgSizeW(160); int iImgSizeH(160); graphics.DrawImage(&image,iImgX,iImgY,iImgSizeW,iImgSizeH);} //////////////////////显示文字////////////////////////////////////wchar_t pszFontFamily[][80]={{L"Arial Black"},{L"Times New Roman"},{L"华文楷体"},{L"华文彩云"}};//FontFamily fontFamily(L"Arial Black");FontFamily fontFamily(pszFontFamily[3]);StringFormat strformat;strformat.SetAlignment(StringAlignmentCenter);Point pOrg(10,10);wchar_t pszbuf[][80]={{L"Hello everyone!"},{L"Happy New Year!"},{L"I wish you will lead a happy life!"},{L"Love you!"},{L"Thanks all the people on CP!"},{L"I'm Luke Sky walker!"}};GraphicsPath path;//表示一系列相互连接的直线和曲线。无法继承此类。//向此路径添加文本字符串path.AddString(pszbuf[m_iLyricsIndex],wcslen(pszbuf[m_iLyricsIndex]),&fontFamily,FontStyleBold///,FontStyleBold//,FontStyleRegular//FontStyleBoldItalic,50//,38 //FontSize,m_rectText//它表示文本从其起始的点,&strformat);Color clrPenColor(155,255,0,0);//alpha, red, green, and blue (215,215,215)Pen pen(clrPenColor,1//Real number that specifies the width of this pen's stroke);graphics.DrawPath(&pen,&path);for(int i=1; i<9; i+=1){Pen pen(Color(62, 0, 2, 2), (float)i); pen.SetLineJoin(LineJoinRound);//LineJoinRound 两线相交处圆滑处理 graphics.DrawPath(&pen, &path); } if(m_bLinearGradientBrush) {//使用线性渐变封装 Brush。无法继承此类。LinearGradientBrush linGrBrush(Point(0,10)//表示线性渐变起始点的 Point 结构,Point(0,70)//表示线性渐变终结点的 Point 结构,Color(255,255,255,255)//表示线性渐变起始色的 Color 结构,Color(255,30,120,195)//表示线性渐变结束色的 Color 结构);LinearGradientBrush linGrBrushW(Point(0,10),Point(0,70),Color(255,255,255,255),Color(15,1,1,1));graphics.FillPath(&linGrBrush,&path);graphics.FillPath(&linGrBrushW,&path); }/////////////////////////显示覆盖文字//////////////////////////// if(m_bWalkPath) {GraphicsPath WalkPath;WalkPath.AddString(pszbuf[m_iLyricsIndex],wcslen(pszbuf[m_iLyricsIndex]),&fontFamily,FontStyleBold//,FontStyleBold//,FontStyleRegular//FontStyleBoldItalic,50//,38 //FontSize,m_rectText//,Point(10,10)//它表示文本从其起始的点,&strformat);graphics.SetClip(m_clipRect); SolidBrush FillBrush(Color(255,0,0,255)); graphics.FillPath(&FillBrush//确定填充特性的 Brush,&WalkPath ); }/////////////////////////////////////////////////////////////// POINT ptNewWinPos={rct.left,rct.top};SIZE newSizeWindow={iWinRectW,iWinRectH};POINT ptSrcWinPos={0,0};DWORD dwExStyle=GetWindowLong(m_hWnd,GWL_EXSTYLE);if((dwExStyle&0x80000)!=0x80000)SetWindowLong(m_hWnd,GWL_EXSTYLE,dwExStyle^0x80000);//#define WS_EX_LAYERED 0x00080000HDC hdcDstScreen=::GetDC (m_hWnd); //hdcDst//COLORREF crKey(RGB(0,0,255));COLORREF crKey(RGB(255,255,255));BOOL bRet=FALSE;bRet= UpdateLayeredWindow(m_hWnd//hwnd [in] Handle to a layered window. //A layered window is created by specifying WS_EX_LAYERED when creating the window with the CreateWindowEx function. ,hdcDstScreen//hdcDst [in] Handle to a device context (DC) for the screen. ,&ptNewWinPos//pptDst [in] Pointer to a POINT structure that specifies the new screen position of the layered window. ,&newSizeWindow//psize [in] Pointer to a SIZE structure that specifies the new size of the layered window. //If the size of the window is not changing, psize can be NULL. If hdcSrc is NULL, psize must be NULL. ,m_hdcMemory//hdcSrc [in] Handle to a DC for the surface that defines the layered window. ,&ptSrcWinPos//pptSrc [in] Pointer to a POINT structure that specifies the location of the layer in the device context. ,NULL//,crKey//crKey [in] Pointer to a COLORREF value that specifies the color key to be used when composing the layered window. ,&m_Blend//Pointer to a BLENDFUNCTION structure that specifies the transparency value to be used when composing the layered window,2//dwFlags [in] This parameter can be one of the following values //#define ULW_COLORKEY 1 #define ULW_ALPHA 2 #define ULW_OPAQUE 4);DWORD dwErrCode(0);if (!bRet){dwErrCode = GetLastError();}ModifyStyleEx(0,WS_EX_TRANSPARENT);//WS_EX_TRANSPARENT That is, any windows that are beneath the window are not obscured by the window.//SetWindowPos(&wndBottom,ptNewWinPos.x,ptNewWinPos.y,newSizeWindow.cx,newSizeWindow.cy,SWP_SHOWWINDOW);////////////////////////////计算在指定font的hdc中字符串长度 unit:pixel/////////////////////////////string strText;strText = ws2s(L"大h");SIZE szTextSize;GetTextExtentPoint32(hdcDstScreen,strText.c_str(),strText.length(),&szTextSize);///////////////////////////////////////////////////////////////////graphics.ReleaseHDC(m_hdcMemory);::ReleaseDC(m_hWnd,hdcDstScreen); hdcDstScreen=NULL;::ReleaseDC(m_hWnd,hdcTemp);hdcTemp=NULL;DeleteObject(hBitMap);hBitMap=NULL;DeleteDC(m_hdcMemory);m_hdcMemory=NULL;return bRet;}