ImageList transparency in viewlists?

Question

EDIT: I offered generosity, as I doubt that in any case I get answers.

Recently, I have been working with lists, and I decided to add an icon for each element indicating whether it will be input or output. Icons are added well, but they are not transparent:

As you can see, the icons are clearly opaque. I am currently doing something like this by loading icons:

  hImageList = ImageList_Create(16, 16, ILC_MASK | ILC_COLOR32, 2, 2);
  if (hImageList != NULL)
  {
    iIN  = ImageList_AddIcon(hImageList, LoadIcon(hInstance, MAKEINTRESOURCE(101)));
    iOUT = ImageList_AddIcon(hImageList, LoadIcon(hInstance, MAKEINTRESOURCE(102)));
  }

I tried to spoil the flags for ImageList_Createand LoadIcon/ LoadImage, but I was out of luck, and frankly, I ran out of ideas.

Any help would be greatly appreciated.

Answer 1

, ImageList_ReplaceIcon . , HICON .

, imagelists , . , , . ILC_COLOR32 , imagelist 32- dib, -. ILC_MASK , DDB, 1bpp.

- :

• -, 32 16. : - -.
• , ILC_COLOR | ILC_MASK
• , LR_TRANSPARENT.
• , ImageList_AddMasked, COLORREF, .

, ...

• PNG 32- 32- 32- , -.
• imagelist, ILC_COLOR32.
• LoadImage() LR_CREATEDIBSECTION 32bpp dib.
• ImageList_Add()

( , , 32- BMP -, ).

---

, . 4bpp, dev, : -

HWND hwndCtl = CreateWindowEx(0,WC_LISTVIEW,TEXT("ListView1"),WS_CHILD|WS_VISIBLE|WS_HSCROLL|WS_VSCROLL,0,0,cx,cy,hWnd,(HMENU)101,hModule,NULL);
HBITMAP hbm = (HBITMAP)LoadImage(hModule,MAKEINTRESOURCE(IDB_BITMAP1),IMAGE_BITMAP,0,0,0);
COLORREF crMask=RGB(255,0,255);
HIMAGELIST himl = ImageList_Create(16,16,ILC_COLOR|ILC_MASK,2,0);
ImageList_AddMasked(himl,hbm,crMask);
ListView_SetImageList(hwndCtl,himl,LVSIL_NORMAL);

Answer 2

, , , , , LoadImage (..., LR_LOADTRANSPARENT); 0,0 , .

Answer 3

, LoadImage LoadIcon, , . , ?

LoadImage :

HICON hIcon = (HICON)LoadImage(hinstResources,MAKEINTRESOURCE(IDI_ICON),IMAGE_ICON,16,16,LR_DEFAULTCOLOR);

Answer 4

... ImageList, , , 16 , 16 * n , n = ...

255, 0, 255, .

, :

 m_ImageList.Create(16, 16, ILC_COLOR16 | ILC_MASK, 7, 1);
 CBitmap bm;
 bm.LoadBitmap(IDB_SUPERTREEICONS);
 m_ImageList.Add(&bm, RGB(255, 0, 255));
 GetTreeCtrl().SetImageList(&m_ImageList, TVSIL_NORMAL);

, MFC, , , Win32...

, , . "" , .

:

#define TRANSPARENT_COLOR (255,0,255)

UINT iBitmap = IDB_ICON_UP
CDC *dc = GetDC();
int x = 0, y = 0;

    CDC *pDisplayMemDC = new CDC;
    CDC *pMaskDC = new CDC;
    CDC *pMemDC = new CDC;
    CBitmap *pBitmap = new CBitmap;
    CBitmap *pMaskBitmap = new CBitmap;
    CBitmap *pMemBitmap = new CBitmap;
    int cxLogo, cyLogo;
    BITMAP bm;

    pBitmap->LoadBitmap(iBitmap);
    pDisplayMemDC->CreateCompatibleDC(dc);
    CBitmap *pOldBitmap = (CBitmap *)pDisplayMemDC->SelectObject(pBitmap);

    pBitmap->GetObject(sizeof(bm), &bm);
    cxLogo = bm.bmWidth;
    cyLogo = bm.bmHeight;

    pMaskBitmap->CreateBitmap(cxLogo, cyLogo, 1, 1, NULL);
    pMaskDC->CreateCompatibleDC(dc);
    CBitmap *pOldMask = (CBitmap *)pMaskDC->SelectObject(pMaskBitmap);
    COLORREF oldBkColor = pDisplayMemDC->SetBkColor(TRANSPARENT_COLOR);
    pMaskDC->BitBlt(0, 0, cxLogo, cyLogo, pDisplayMemDC, 0, 0, SRCCOPY);

    pMemBitmap->CreateCompatibleBitmap(dc, cxLogo, cyLogo);
    pMemDC->CreateCompatibleDC(dc);
    CBitmap *pOldMem = (CBitmap *)pMemDC->SelectObject(pMemBitmap);

    pMemDC->BitBlt(0, 0, cxLogo, cyLogo, dc,            x, y, SRCCOPY);
    pMemDC->BitBlt(0, 0, cxLogo, cyLogo, pDisplayMemDC, 0, 0, SRCINVERT);
    pMemDC->BitBlt(0, 0, cxLogo, cyLogo, pMaskDC,       0, 0, SRCAND);
    pMemDC->BitBlt(0, 0, cxLogo, cyLogo, pDisplayMemDC, 0, 0, SRCINVERT);
        dc->BitBlt(x, y, cxLogo, cyLogo, pMemDC,        0, 0, SRCCOPY);

    delete pMemDC->SelectObject(pOldMem);
    delete pMemDC;

    delete pMaskDC->SelectObject(pOldMask);
    delete pMaskDC;

    delete pDisplayMemDC->SelectObject(pOldBitmap);
    delete pDisplayMemDC;

, , , , , ...

Hope this helps. If not, please explain in more detail what you are trying to do and what you are seeing, or what you are NOT seeing ...