Example windows image draw function for FireBreath

ImageDraw.cpp

void PluginObject::drawImage(FB::PluginWindow *wnd, FB::PluginEvent* evt, unsigned char *img, int width, int height) {
    HDC hdc=NULL;
        
    BITMAPINFO bitmapInfo;
    bitmapInfo.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
    bitmapInfo.bmiHeader.biBitCount=32;
    bitmapInfo.bmiHeader.biCompression=BI_RGB;
    bitmapInfo.bmiHeader.biPlanes = 1;
    bitmapInfo.bmiHeader.biSizeImage = width*height*4;
    bitmapInfo.bmiHeader.biWidth = width;
    bitmapInfo.bmiHeader.biHeight = height;

    FB::PluginWindowWin *winwin = dynamic_cast< FB::PluginWindowWin *>(wnd);
    if(winwin!=NULL) {
        PAINTSTRUCT ps;
        hdc = BeginPaint(winwin->getHWND(), &ps);
        if(hdc==NULL) return;
        int dstWidth = wnd->getWindowWidth();
        int dstHeight = wnd->getWindowHeight();
        
        SetStretchBltMode(hdc, HALFTONE);
        StretchDIBits(hdc, 0, dstHeight, dstWidth, -dstHeight, 0,0, width, height, img, &bitmapInfo,DIB_RGB_COLORS,SRCCOPY);

        EndPaint(winwin->getHWND(), &ps);
    }
    

    FB::PluginWindowlessWin *windowlesswin = dynamic_cast< FB::PluginWindowlessWin *>(wnd);
    if(windowlesswin!=NULL) {
        hdc=windowlesswin->getHDC();
        FB::Rect r = wnd->getWindowPosition();
        int dstWidth = wnd->getWindowWidth();
        int dstHeight = wnd->getWindowHeight();
        
        SetStretchBltMode(hdc, HALFTONE);
        StretchDIBits(hdc, r.left, r.bottom, dstWidth, -dstHeight, 0,0, width, height, img, &bitmapInfo,DIB_RGB_COLORS,SRCCOPY);

        if(hdc==NULL) return;
    }
}

if npapi can wrap an activex transparent contrlol ?