变色字体

Posted 2020-12-02 ye-ming

CRect rect;

    GetClientRect(hWnd, rect);

    HDC hdc = GetDC(hWnd);

    HDC memDC = CreateCompatibleDC(hdc);

 

    BITMAPINFO bmi;

    bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);

    bmi.bmiHeader.biBitCount = 32;

    bmi.bmiHeader.biHeight = rect.Height();

    bmi.bmiHeader.biWidth = rect.Width();

    bmi.bmiHeader.biPlanes = 1;

    bmi.bmiHeader.biCompression = BI_RGB;

    bmi.bmiHeader.biClrImportant = 0;

    bmi.bmiHeader.biClrUsed = 0;

    bmi.bmiHeader.biXPelsPerMeter = 0;

    bmi.bmiHeader.biYPelsPerMeter = 0;

    bmi.bmiHeader.biSizeImage = rect.Width()*rect.Height() * 32 / 8;

     

    HBITMAP bmp = CreateDIBSection(hdc, &bmi, 0, NULL, NULL, 0);

    SelectObject(memDC, bmp);

 

    Gdiplus::Graphics *graphics = new Gdiplus::Graphics(memDC);

    graphics->SetSmoothingMode(Gdiplus::SmoothingModeAntiAlias);

    graphics->SetTextRenderingHint(Gdiplus::TextRenderingHintAntiAlias);

 

#ifdef _UNICODE

    LPWSTR str = (LPWSTR)_lyric;

#else

    USES_CONVERSION;

    LPWSTR str = A2W(_lyric);

#endif // _UNICODE

    Gdiplus::FontFamily fontFamily(L"微软雅黑");

    Gdiplus::Font m_pFont(&fontFamily, 48, Gdiplus::FontStyleRegular, Gdiplus::UnitPixel);

    Gdiplus::Font m_pFont2(&fontFamily, 48, Gdiplus::FontStyleUnderline, Gdiplus::UnitPixel);//下划线

 

    Gdiplus::StringFormat format; 

    RectF layoutRect(0, 0, 1000, 100);

    RectF boundingBox;

    StringFormat strfmt;

    strfmt.SetTrimming(StringTrimmingWord);

    strfmt.SetFormatFlags(StringFormatFlagsNoWrap);

    strfmt.SetLineAlignment(StringAlignmentCenter);

    strfmt.SetAlignment(StringAlignmentCenter);

    graphics->MeasureString(str, -1, &m_pFont, layoutRect, &strfmt, &boundingBox);

     

     

    Gdiplus::GraphicsPath stringPath(FillModeAlternate);//创建路径

 

    stringPath.AddString(str, -1, &fontFamily, m_pFont.GetStyle(), 48, boundingBox,&strfmt); //把文字加入路径

     

    graphics->DrawPath(&Pen(Color(150,0,0,0)), &stringPath);//绘制边框

     

    Gdiplus::LinearGradientBrush brush(boundingBox, Color::Blue, Color::Red, LinearGradientModeHorizontal);

 

    int colors[] = { Color::Red ,Color::Orange ,Color::Yellow ,Color::Green ,Color::Cyan,Color::Blue ,Color::Purple };

    REAL positions[] = { 0.0f,0.16f,0.33f,0.50f,0.67f,0.83f,1.0f };

    brush.SetInterpolationColors((Color*)colors, positions, 7);

    graphics->FillPath(&brush, &stringPath);//填充路径

 

    RectF fillrect = boundingBox;

    fillrect.Width = (boundingBox.Width*0.2);

    stringPath.AddString(str, -1, &fontFamily, m_pFont2.GetStyle(), 48, boundingBox, &strfmt); //把文字加入路径

 

    graphics->IntersectClip(fillrect);

    graphics->FillPath(&SolidBrush(Color::Red), &stringPath);

 

    RectF fillrect2 = boundingBox;

    fillrect2.X += 500;

    fillrect2.Width = (boundingBox.Width*0.2);

    graphics->SetClip(fillrect2);   

    graphics->FillPath(&SolidBrush(Color::Green), &stringPath);

 

    delete graphics;

     

    BLENDFUNCTION bldfun;

    bldfun.AlphaFormat = AC_SRC_ALPHA;

    bldfun.BlendFlags = 0;

    bldfun.BlendOp = AC_SRC_OVER;

    bldfun.SourceConstantAlpha = 255;

    UpdateLayeredWindow(hWnd, hdc, NULL, &CSize(1000, 100), memDC, &CPoint(0, 0), 0, &bldfun, ULW_ALPHA);

     

    ::ReleaseDC(hWnd, hdc);

    ::DeleteDC(memDC);

    DeleteObject(bmp);