基于VS2013MFC左移显示效果

//以下代码是基于ANSI编码方式
BOOL CPlugIn::DrawRollLight()
{
HDC hScrDC,hScrDC1, hMemDC1, hMemDC_a;
CDC MemDC;
if (!MemDC.CreateCompatibleDC(pDC))     //建立一个与pDC 设备上下文环境的句柄
{
return 0;
}
CBitmap m_BitmapQuotes;
if (!m_BitmapQuotes.CreateCompatibleBitmap(pDC, MaxLength, Height)) //建立与pDC相兼容的位图
{
return 0;
}

CBitmap *pOldBitmap = (CBitmap *)MemDC.SelectObject(&m_BitmapQuotes);

//背景
if (BgMode == 1)        //背景色
{
CRect rct;
GetClientRect(ParentHwnd, &rct);
CBrush   brush;
brush.CreateSolidBrush(BgColor);
MemDC.FillRect(&rct, &brush);
}
else if (BgMode == 2)   //背景图片
{
wchar_t m_BgFileName[200];
c2w(m_BgFileName, 200, strBgPt);
Graphics graphicsp(MemDC);
if (nBgPtForm == 0)     //平铺
{
Bitmap backgroundmiddle(m_BgFileName);
TextureBrush brush(&backgroundmiddle, WrapModeTileFlipXY);
graphicsp.FillRectangle(&brush, RectF(0.0f, 0.0f, (float)Width, (float)Height));
}
if (nBgPtForm == 1)
{

ImageAttributes imAtt;
imAtt.SetWrapMode(WrapModeTile);
//拉伸图片
Bitmap Backgroundtop(m_BgFileName);
graphicsp.DrawImage(&Backgroundtop, Rect(0, 0, Width, Height),
0, 0, Backgroundtop.GetWidth(), Backgroundtop.GetHeight(),
UnitPixel,
&imAtt);
}
}
pDC->BitBlt(0, 0, Width, Height, &MemDC, 0, 0, SRCCOPY);
UpdateWindow(ParentHwnd);

HBITMAP hBitmap, hOldBitmap, hBitmap_a, hOldBitmap_a;
int width, height;
int i, x, y = 0;
int lineSpaceTemp = 0;
int angle;
CString str1, str2, textFontName, textStr;
str1 = strAllInfo;
try
{
//创建一个用于绘制文本的位图
hScrDC = CreateDC(_T("Display"), NULL, NULL, NULL);   //创建指定设备的设备上下文
hMemDC1 = CreateCompatibleDC(hScrDC);                   //创建hScrDC设备上下文的句柄, hMemDC1
width = Width + 100 + 20;
height = Height + 100;

//创建一个用于张贴图片和文本汇总的位图
hMemDC_a = CreateCompatibleDC(NULL);
hBitmap_a = CreateCompatibleBitmap(pDC->GetSafeHdc(), Width, Height);   //创建与hScrDC1相兼容的位图<
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hOldBitmap_a = (HBITMAP)SelectObject(hMemDC_a, hBitmap_a);
CRect rct;
GetClientRect(ParentHwnd, &rct);
CBrush   brush;
brush.CreateSolidBrush(BgColor);
if (BgMode == 1 || BgMode == 0)
FillRect(hMemDC_a, &rct, brush);

RECT rect;
rect.left = 0;
rect.top = 0;
rect.right = width;
rect.bottom = height;
HFONT MyFont, pOldFont;
angle = 0;
TCHAR chn = L',';
int nFind = 0;
CString TempFont;
TempFont = strFont;
nFind = TempFont.Find(chn);
textFontName = TempFont.Left(nFind);

MyFont = CreateFont(TextLf.lfHeight,
0,
angle,
0,
TextLf.lfWeight,
TextLf.lfItalic,
TextLf.lfUnderline,
TextLf.lfStrikeOut,
DEFAULT_CHARSET,
OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS,
DEFAULT_QUALITY,
DEFAULT_PITCH | FF_SWISS,
textFontName
);
pOldFont = (HFONT)SelectObject(hMemDC1, MyFont);
SetTextColor(hMemDC1, RGB(GetRValue(TextColor), GetGValue(TextColor), GetBValue(TextColor)));
CDC *pDC0;
pDC0 = CDC::FromHandle(hMemDC1);                                //定义设备上下文对象指针 pDC0,源于hMemDC1，hScrDC
CSize size;
GetTextExtentPoint(hMemDC1, strAllInfo, strAllInfo.GetLength(), &size);
LastWidth = size.cx;

hBitmap = CreateCompatibleBitmap(hScrDC, max(width, LastWidth + nDeep + 100), height);  //创建与hScrDC相兼容的位图
hOldBitmap = (HBITMAP)SelectObject(hMemDC1, hBitmap);

CRect ClientRC;
GetClientRect(ParentHwnd, ClientRC);
Graphics g(pDC0->GetSafeHdc());
CString fontFamilyName;
fontFamilyName = TextLf.lfFaceName;
FontFamily fontFamily(fontFamilyName.AllocSysString());
LOGFONT lf1;
pDC0->GetCurrentFont()->GetLogFont(&lf1);
strcpy_s(lf1.lfFaceName, TextLf.lfFaceName);
HDC hHDC = ::GetDC(NULL);                                       //检索整个屏幕的设备上下文环境
Gdiplus::Font font(hHDC, &lf1);
::ReleaseDC(NULL, hHDC);
StringFormat drawFormat = new StringFormat();
drawFormat.GenericDefault();
drawFormat.SetAlignment(StringAlignmentNear);       //居左

if (nShowPlace == 0)            //上
{
x = 0;
y = 10;
}
else if (nShowPlace == 1)   //中
{
x = 0;
y = (Height - abs(TextLf.lfHeight) - nDeep) / 2;
}
else if (nShowPlace == 2) //下
{
x = 0;
y = Height - abs(TextLf.lfHeight) - nDeep - abs(TextLf.lfHeight)/7;   //太靠底，所以提高个像素
}

int Xstart = 0, Ystart = 0, widthTemp = 0, heightTemp = 0;
Xstart = x;
Ystart = y;
widthTemp = max(LastWidth + nDeep + 100, Width+ 10);
heightTemp =  abs(TextLf.lfHeight);
RectF desRC(Xstart, Ystart, widthTemp, heightTemp);
pDC0->SetBkMode(TRANSPARENT);
HWND hwnd = WindowFromDC(hMemDC1);
SetTransparent(hwnd, 1);
if (!bEffect)
{
drawFormat.SetAlignment(StringAlignmentNear);       //居左
g.DrawString(str1.AllocSysString(), -1, &font, desRC, &drawFormat, &SolidBrush(Color(255, GetRValue(TextColor), GetGValue(TextColor), GetBValue(TextColor))));
}
else
{
FontFamily familyTemp;
font.GetFamily(&familyTemp);
if (1)
{
if (nEffectForm == 0)      //悬浮
{
RectF desRC1;
desRC1 = desRC;
desRC1.X = desRC.X + nDeep;
desRC1.Y = desRC.Y + nDeep;
g.DrawString(str1.AllocSysString(), -1, &font, desRC1, &drawFormat, &SolidBrush(Color(GetRValue(Eff_Color), GetGValue(Eff_Color), GetBValue(Eff_Color))));
g.DrawString(str1.AllocSysString(), -1, &font, desRC, &drawFormat, &SolidBrush(Color(GetRValue(TextColor), GetGValue(TextColor), GetBValue(TextColor))));
}
else if (nEffectForm == 1)   //套色
{
Graphics graphics(pDC0->GetSafeHdc());
graphics.SetSmoothingMode(SmoothingModeAntiAlias);
graphics.SetInterpolationMode(InterpolationModeHighQualityBicubic);
GraphicsPath path;
path.AddString(str1.AllocSysString(), -1, &familyTemp, font.GetStyle(), font.GetSize(), desRC, &drawFormat);
Color penColor(GetRValue(Eff_Color), GetGValue(Eff_Color), GetBValue(Eff_Color));
Pen pen(penColor, nDeep);
pen.SetLineJoin(LineJoinRound);
graphics.DrawPath(&pen, &path);
Color brushColor(GetRValue(TextColor), GetGValue(TextColor), GetBValue(TextColor));
SolidBrush brush(brushColor);
graphics.FillPath(&brush, &path);
}
else if (nEffectForm == 2)    //空心
{
Graphics g(pDC0->GetSafeHdc());
GraphicsPath gp;
gp.AddString(str1.AllocSysString(), -1, &familyTemp, font.GetStyle(), font.GetSize(), desRC, &drawFormat);
Color penColor(GetRValue(TextColor), GetGValue(TextColor), GetBValue(TextColor));
Pen pen(penColor, 1);
g.DrawPath(&pen, &gp);    //把路径画出来
}
}
}

//制作图片

HDC hDC;
int iBits;
WORD wBitCount;
DWORD dwPaletteSize = 0, dwBmBitsSize;
BITMAP  Bitmap;
BITMAPINFOHEADER    bi;
LPBITMAPINFOHEADER  lpbi;
HANDLE hDib, hPal, hOldPal = NULL;

hDC = CreateDC(_T("DISPLAY"), NULL, NULL, NULL);
iBits = GetDeviceCaps(hDC, BITSPIXEL)*GetDeviceCaps(hDC, PLANES);
DeleteDC(hDC);
if (iBits <= 1) wBitCount = 1;
else if (iBits <= 4)    wBitCount = 4;
else if (iBits <= 8)    wBitCount = 8;
else if (iBits <= 24)wBitCount = 24;
else    wBitCount = 24;

if (wBitCount <= 8) dwPaletteSize = (1 << wBitCount) * sizeof(RGBQUAD);
GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&Bitmap);
bi.biSize = sizeof(BITMAPINFOHEADER);
bi.biWidth = LastWidth + nDeep + Width;
bi.biHeight = Bitmap.bmHeight;
bi.biPlanes = 1;
bi.biBitCount = wBitCount;
bi.biCompression = BI_RGB;
bi.biSizeImage = 0;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = 0;
bi.biClrImportant = 0;

dwBmBitsSize = (((LastWidth + nDeep + Width)*wBitCount + 31) / 32) * 4 * Bitmap.bmHeight;

hDib = GlobalAlloc(GHND, dwBmBitsSize + dwPaletteSize + sizeof(BITMAPINFOHEADER));

lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDib);
*lpbi = bi;
hPal = GetStockObject(DEFAULT_PALETTE);
if (hPal)
{
hDC = GetDC(NULL);
hOldPal = SelectPalette(hDC, (HPALETTE)hPal, FALSE);
RealizePalette(hDC);
}
GetDIBits(hDC, hBitmap, 0, (UINT)Bitmap.bmHeight, (LPSTR)lpbi + sizeof(BITMAPINFOHEADER) + dwPaletteSize, (BITMAPINFO*)lpbi, DIB_RGB_COLORS);

if (hOldPal)
{
SelectPalette(hDC, (HPALETTE)hOldPal, TRUE);
RealizePalette(hDC);
ReleaseDC(NULL, hDC);
}
int count = 0;
int StartY, BmpWidth;
BmpWidth = (int)((Width + 100 + 20) * 3 + 3) / 4;
BmpWidth = BmpWidth * 4;
HDC hdc_bk = MemDC.GetSafeHdc();

int startX = 0, startY = 0;
if (wBitCount == 24)
{
CDC* pMDC = CDC::FromHandle(hMemDC_a);

StartY = 0;
BLENDFUNCTION blendFunction;
blendFunction.BlendOp = AC_SRC_OVER;
blendFunction.BlendFlags = 0;
blendFunction.SourceConstantAlpha = 255;
blendFunction.AlphaFormat = 0x01;

if (LastWidth + nDeep + 50 > Width)   //文本长度大于窗口宽度
{
for (i = 0; i <= LastWidth + nDeep + 50 ; i++)
{
//                  pDC->BitBlt(0, 0, Width, Height, &MemDC, 0, 0, SRCCOPY);
//张贴背景到hMemDC_a 内存句柄上
int BkDestX = Width - i;
int BkDestWidth = i;
int BkSourceX = Width - i;
int BkSourceWidth = i;
if (BkDestX <= 0)
{
BkDestX = 0;
BkDestWidth = Width;
BkSourceWidth = Width;
BkSourceX = 0;
}
int TxtDestX = Width - i;
int TxtDestWidth = i;
int TxtSourceX = startX;
int TxtSourceWidth = i;
if (TxtDestX <= 0)
{
TxtDestX = 0;
TxtDestWidth = Width;
TxtSourceX = i - Width;
TxtSourceWidth = Width;
}
blendFunction.BlendOp = AC_SRC_OVER;
blendFunction.BlendFlags = 0;
blendFunction.SourceConstantAlpha = 255;
blendFunction.AlphaFormat = 0x00;        //采用不透明的方式张贴背景
BOOL bBlend1 = AlphaBlend(hMemDC_a, BkDestX, 0, BkDestWidth, Height, hdc_bk, BkSourceX, 0, BkSourceWidth, Height, blendFunction);   //此函数可实现透明粘贴位图
blendFunction.BlendOp = AC_SRC_OVER;
blendFunction.BlendFlags = 0;
blendFunction.SourceConstantAlpha = 255;
blendFunction.AlphaFormat = 0x01;        //采用透明的方式张贴文本
BOOL bBlend = AlphaBlend(hMemDC_a, TxtDestX, startY, TxtDestWidth, Height, hMemDC1, TxtSourceX, startY, TxtSourceWidth, Height, blendFunction);

blendFunction.BlendOp = AC_SRC_OVER;
blendFunction.BlendFlags = 0;
if (BgMode == 1 || BgMode == 0)     //背景透明和背景颜色
{
blendFunction.SourceConstantAlpha = 255;
blendFunction.AlphaFormat = 0x00;    //不透明张贴位图到窗口
}
else    //背景图片
{
blendFunction.SourceConstantAlpha = 255;
blendFunction.AlphaFormat = 0x01;   //透明张贴位图到窗口
}
AlphaBlend(hMemDC, 0, 0, Width, Height, hMemDC_a, 0, 0, Width, Height, blendFunction);
if (!RunFlag) goto done1;
Sleep(RollSpeed);
}
}
else if (LastWidth + nDeep + 50 <= Width)    //文本长度小于窗口的宽度
{
for (i = 0; i <= Width + 0; i++)
{
//pDC->BitBlt(0, 0, Width, Height, &MemDC, 0, 0, SRCCOPY);
//张贴背景到hMemDC_a内存句柄上
int BkDestX = Width - i;
int BkDestWidth = i;
int BkSourceX = Width - i;
int BkSourceWidth = i;
blendFunction.BlendOp = AC_SRC_OVER;
blendFunction.BlendFlags = 0;
blendFunction.SourceConstantAlpha = 255;
blendFunction.AlphaFormat = 0x00;
AlphaBlend(hMemDC_a, BkDestX, 0, BkDestWidth, Height, hdc_bk, BkSourceX, 0, BkSourceWidth, Height, blendFunction);
//张贴文本图片到hMemDC_a内存句柄上
int TxtDestX = Width - i;
int TxtDestWidth = i;
int TxtSourceX = startX;
int TxtSourceWidth = i;
blendFunction.BlendOp = AC_SRC_OVER;
blendFunction.BlendFlags = 0;
blendFunction.SourceConstantAlpha = 255;
blendFunction.AlphaFormat = 0x01;
BOOL bBlend = AlphaBlend(hMemDC_a, TxtDestX, startY, TxtDestWidth, Height, hMemDC1, TxtSourceX, startY, TxtSourceWidth, Height, blendFunction);

int k = GetLastError();
if (k != 0)
{
int m = 10;
}
blendFunction.BlendOp = AC_SRC_OVER;
blendFunction.BlendFlags = 0;
if (BgMode == 1 || BgMode == 0)
{
blendFunction.SourceConstantAlpha = 255;
blendFunction.AlphaFormat = 0x00;
}
else
{
blendFunction.SourceConstantAlpha = 255;
blendFunction.AlphaFormat = 0x01;
}
AlphaBlend(hMemDC, 0, 0, Width, Height, hMemDC_a, 0, 0, Width, Height, blendFunction);
if (!RunFlag) goto done1;
Sleep(RollSpeed);
}
}

}
done1:    //用于直接跳转或顺序执行到此位置，因为应用到插件上，需要中途“停止”功能
SelectObject(hMemDC1, pOldFont);
DeleteObject(MyFont);
hBitmap = (HBITMAP)SelectObject(hMemDC1, hOldBitmap);
hBitmap_a = (HBITMAP)SelectObject(hMemDC_a, hOldBitmap_a);
CBitmap *pOldBitmap = (CBitmap *)MemDC.SelectObject(&m_BitmapQuotes);
MemDC.SelectObject(pOldBitmap);
DeleteDC(MemDC);
DeleteDC(hScrDC);
DeleteDC(hMemDC1);
DeleteDC(hMemDC_a);

DeleteObject(hBitmap);
DeleteObject(hBitmap_a);
return TRUE;
}
catch (...)
{
return FALSE;
}
}