wps表格插件菜单栏在高分辨率下图片显示模糊

wps插件图标显示模糊问题，目前看下来和图片没关系

1.目前Excel使用OleCreatePictureIndirect直接加载转换IPictureDisp对象返回给excel菜单显示

2.wps直接使用OleCreatePictureIndirect来创建图片显示不出来，wps不兼容png图片，目前采用的方式通过GDI绘制将png先转换成bmp格式的流，在通过OleLoadPicture将流转换成IPictureDisp对象给wps显示。尝试了直接加载bmp格式的图片，看下来效果还是一样

3.研究了国产的图片加载：国产是直接返回一个路径就可以加载，目前看下来直接返回的png格式的图片路径给wps，显示在高分辨率下就会模糊。如果是矢量图.svg格式的图片给wps是可以避免模糊，但是这个在com加载项里面还不知道怎么加载。

具体实现代码如下：

//wps加载透明图片

void LoadTransparentPNG(const WCHAR* pszImagePath, VARIANT* result)

{

GdiplusStartupInput gdiplusStartupInput;

ULONG_PTR gdiplusToken = 0;

GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

Bitmap bitmap(pszImagePath);

PixelFormat pixelFormat = bitmap.GetPixelFormat();

ColorPalette* pPalette = NULL;

UINT paletteSize = 0;

bitmap.GetPalette(NULL, paletteSize);

if (paletteSize > 0)

{

pPalette = (ColorPalette*)malloc(paletteSize);

bitmap.GetPalette(pPalette, paletteSize);

}

HDC hdcScreen = GetDC(NULL);

HDC hdcMem = CreateCompatibleDC(hdcScreen);

int width = bitmap.GetWidth();

int height = bitmap.GetHeight();

HBITMAP hBitmap = NULL;

BITMAPINFO bmpInfo = { 0 };

bmpInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);

bmpInfo.bmiHeader.biWidth = width;

bmpInfo.bmiHeader.biHeight = -height;

bmpInfo.bmiHeader.biPlanes = 1;

bmpInfo.bmiHeader.biCompression = BI_RGB;

bmpInfo.bmiHeader.biBitCount = pixelFormat == PixelFormat32bppARGB ? 32 : 24;

bmpInfo.bmiHeader.biSizeImage = width * height * 4;

bmpInfo.bmiHeader.biClrUsed = pPalette ? pPalette->Count : 0;

hBitmap = CreateDIBSection(hdcMem, &bmpInfo, DIB_RGB_COLORS, NULL, NULL, 0);

HBITMAP hOldBitmap = (HBITMAP)SelectObject(hdcMem, hBitmap);

SetGraphicsMode(hdcMem, GM_ADVANCED);

SetMapMode(hdcMem, MM_TEXT);

SetViewportOrgEx(hdcMem, 0, 0, NULL);

SetWindowOrgEx(hdcMem, 0, 0, NULL);

SetStretchBltMode(hdcMem, HALFTONE);

SetBrushOrgEx(hdcMem, 0, 0, NULL);

SetROP2(hdcMem, R2_COPYPEN);

SetGraphicsMode(hdcMem, GM_ADVANCED);

SetArcDirection(hdcMem, AD_COUNTERCLOCKWISE);

SetMiterLimit(hdcMem, 10, NULL);

SetPolyFillMode(hdcMem, WINDING);

SetStretchBltMode(hdcMem, HALFTONE);

SetROP2(hdcMem, R2_COPYPEN);

SetArcDirection(hdcMem, AD_COUNTERCLOCKWISE);

SetMiterLimit(hdcMem, 10, NULL);

SetPolyFillMode(hdcMem, WINDING);

SetStretchBltMode(hdcMem, HALFTONE);

Graphics graphics(hdcMem);

graphics.SetSmoothingMode(SmoothingModeHighQuality);

graphics.SetCompositingMode(CompositingModeSourceOver);

graphics.DrawImage(&bitmap, 0, 0, width, height);

IStream* pStream = NULL;

CreateStreamOnHGlobal(NULL, TRUE, &pStream);

BITMAPFILEHEADER bmpFileHeader = { 0 };

bmpFileHeader.bfType = 0x4D42; // "BM"

bmpFileHeader.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);

bmpFileHeader.bfSize = bmpFileHeader.bfOffBits + bmpInfo.bmiHeader.biSizeImage;

pStream->Write(&bmpFileHeader, sizeof(BITMAPFILEHEADER), NULL);

pStream->Write(&bmpInfo.bmiHeader, sizeof(BITMAPINFOHEADER), NULL);

BITMAPINFO bmpInfoLocked = bmpInfo;

BYTE* pBits = NULL;

if (GetDIBits(hdcMem, hBitmap, 0, height, NULL, &bmpInfoLocked, DIB_RGB_COLORS))

{

pBits = new BYTE[bmpInfoLocked.bmiHeader.biSizeImage];

if (GetDIBits(hdcMem, hBitmap, 0, height, pBits, &bmpInfoLocked, DIB_RGB_COLORS))

{

pStream->Write(pBits, bmpInfoLocked.bmiHeader.biSizeImage, NULL);

}

}

if (pBits != NULL)

{

delete[] pBits;

}

pStream->Seek({ 0 }, STREAM_SEEK_SET, NULL);

PICTDESC pictDesc = { 0 };

pictDesc.cbSizeofstruct = sizeof(PICTDESC);

pictDesc.picType = PICTYPE_BITMAP;

pictDesc.bmp.hbitmap = hBitmap;

pictDesc.bmp.hpal = NULL;

IPicture* pPicture = NULL;

HRESULT hr = OleLoadPicture(pStream, bmpFileHeader.bfSize, TRUE, IID_IPicture, (void**)&pPicture);

if (pPalette != NULL)

{

free(pPalette);

}

pStream->Release();

SelectObject(hdcMem, hOldBitmap);

DeleteDC(hdcMem);

ReleaseDC(NULL, hdcScreen);

if (pPicture != nullptr)

{

result->vt = VT_UNKNOWN;

pPicture->QueryInterface(IID_IUnknown, (void**)&result->punkVal);

}

GdiplusShutdown(gdiplusToken);

}

excel加载图片逻辑如下

Gdiplus::Bitmap bitmap(fullPath.c_str());

HBITMAP hBitmap;

Gdiplus::Color color(0, 0, 0, 0);

bitmap.GetHBITMAP(color, &hBitmap);

if (hBitmap)

{

PICTDESC pd;

pd.cbSizeofstruct = sizeof(PICTDESC);

pd.picType = PICTYPE_BITMAP;

pd.bmp.hbitmap = hBitmap;

pd.bmp.hpal = NULL;

IPictureDisp * pPictureDisp = NULL;

hr = OleCreatePictureIndirect(&pd, IID_IPictureDisp, TRUE, (void **)&pPictureDisp);

if (SUCCEEDED(hr))

{

result->vt = VT_DISPATCH;

result->pdispVal = pPictureDisp;

}

else

{

DeleteObject(hBitmap);

}

}

在175%显示如图片所示：excel展示正常，但是wps的大图片显示会模糊。是否有解决方案解决这个问题