imagelist.c

来自「一个类似windows」· C语言 代码 · 共 2,271 行 · 第 1/5 页

 *
 * RETURNS
 *     Image list flags.
 *
 * BUGS
 *    Stub.
 */

DWORD WINAPI
ImageList_GetFlags(HIMAGELIST himl)
{
    FIXME("(%p):empty stub\n", himl);
    return 0;
}


/*************************************************************************
 * ImageList_GetIcon [COMCTL32.@]
 *
 * Creates an icon from a masked image of an image list.
 *
 * PARAMS
 *     himl  [I] handle to image list
 *     i     [I] image index
 *     flags [I] drawing style flags
 *
 * RETURNS
 *     Success: icon handle
 *     Failure: NULL
 */

HICON WINAPI
ImageList_GetIcon (HIMAGELIST himl, INT i, UINT fStyle)
{
    ICONINFO ii;
    HICON hIcon;
    HBITMAP hOldDstBitmap;
    HDC hdcDst;

    TRACE("%p %d %d\n", himl, i, fStyle);
    if (!is_valid(himl) || (i < 0) || (i >= himl->cCurImage)) return NULL;

    ii.fIcon = TRUE;
    ii.xHotspot = 0;
    ii.yHotspot = 0;

    /* create colour bitmap */
    hdcDst = GetDC(0);
    ii.hbmColor = CreateCompatibleBitmap(hdcDst, himl->cx, himl->cy);
    ReleaseDC(0, hdcDst);

    hdcDst = CreateCompatibleDC(0);

    /* draw mask*/
    ii.hbmMask  = CreateBitmap (himl->cx, himl->cy, 1, 1, NULL);
    hOldDstBitmap = SelectObject (hdcDst, ii.hbmMask);
    if (himl->hbmMask) {
        BitBlt (hdcDst, 0, 0, himl->cx, himl->cy,
                himl->hdcMask, i * himl->cx, 0, SRCCOPY);
    }
    else
        PatBlt (hdcDst, 0, 0, himl->cx, himl->cy, BLACKNESS);

    /* draw image*/
    SelectObject (hdcDst, ii.hbmColor);
    BitBlt (hdcDst, 0, 0, himl->cx, himl->cy,
            himl->hdcImage, i * himl->cx, 0, SRCCOPY);

    /*
     * CreateIconIndirect requires us to deselect the bitmaps from
     * the DCs before calling
     */
    SelectObject(hdcDst, hOldDstBitmap);

    hIcon = CreateIconIndirect (&ii);

    DeleteObject (ii.hbmMask);
    DeleteObject (ii.hbmColor);
    DeleteDC (hdcDst);

    return hIcon;
}


/*************************************************************************
 * ImageList_GetIconSize [COMCTL32.@]
 *
 * Retrieves the size of an image in an image list.
 *
 * PARAMS
 *     himl [I] handle to image list
 *     cx   [O] pointer to the image width.
 *     cy   [O] pointer to the image height.
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 *
 * NOTES
 *     All images in an image list have the same size.
 */

BOOL WINAPI
ImageList_GetIconSize (HIMAGELIST himl, INT *cx, INT *cy)
{
    if (!is_valid(himl))
	return FALSE;
    if ((himl->cx <= 0) || (himl->cy <= 0))
	return FALSE;

    if (cx)
	*cx = himl->cx;
    if (cy)
	*cy = himl->cy;

    return TRUE;
}


/*************************************************************************
 * ImageList_GetImageCount [COMCTL32.@]
 *
 * Returns the number of images in an image list.
 *
 * PARAMS
 *     himl [I] handle to image list
 *
 * RETURNS
 *     Success: Number of images.
 *     Failure: 0
 */

INT WINAPI
ImageList_GetImageCount (HIMAGELIST himl)
{
    if (!is_valid(himl))
	return 0;

    return himl->cCurImage;
}


/*************************************************************************
 * ImageList_GetImageInfo [COMCTL32.@]
 *
 * Returns information about an image in an image list.
 *
 * PARAMS
 *     himl       [I] handle to image list
 *     i          [I] image index
 *     pImageInfo [O] pointer to the image information
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
ImageList_GetImageInfo (HIMAGELIST himl, INT i, IMAGEINFO *pImageInfo)
{
    if (!is_valid(himl) || (pImageInfo == NULL))
	return FALSE;
    if ((i < 0) || (i >= himl->cCurImage))
	return FALSE;

    pImageInfo->hbmImage = himl->hbmImage;
    pImageInfo->hbmMask  = himl->hbmMask;

    pImageInfo->rcImage.top    = 0;
    pImageInfo->rcImage.bottom = himl->cy;
    pImageInfo->rcImage.left   = i * himl->cx;
    pImageInfo->rcImage.right  = (i+1) * himl->cx;

    return TRUE;
}


/*************************************************************************
 * ImageList_GetImageRect [COMCTL32.@]
 *
 * Retrieves the rectangle of the specified image in an image list.
 *
 * PARAMS
 *     himl   [I] handle to image list
 *     i      [I] image index
 *     lpRect [O] pointer to the image rectangle
 *
 * RETURNS
 *    Success: TRUE
 *    Failure: FALSE
 *
 * NOTES
 *    This is an UNDOCUMENTED function!!!
 */

BOOL WINAPI
ImageList_GetImageRect (HIMAGELIST himl, INT i, LPRECT lpRect)
{
    if (!is_valid(himl) || (lpRect == NULL))
	return FALSE;
    if ((i < 0) || (i >= himl->cCurImage))
	return FALSE;

    lpRect->left   = i * himl->cx;
    lpRect->top    = 0;
    lpRect->right  = lpRect->left + himl->cx;
    lpRect->bottom = himl->cy;

    return TRUE;
}


/*************************************************************************
 * ImageList_LoadImage  [COMCTL32.@]
 * ImageList_LoadImageA [COMCTL32.@]
 *
 * Creates an image list from a bitmap, icon or cursor.
 *
 * See ImageList_LoadImageW.
 */

HIMAGELIST WINAPI
ImageList_LoadImageA (HINSTANCE hi, LPCSTR lpbmp, INT cx, INT cGrow,
			COLORREF clrMask, UINT uType, UINT uFlags)
{
    HIMAGELIST himl;
    LPWSTR lpbmpW;
    DWORD len;

    if (!HIWORD(lpbmp))
        return ImageList_LoadImageW(hi, (LPCWSTR)lpbmp, cx, cGrow, clrMask,
                                    uType, uFlags);

    len = MultiByteToWideChar(CP_ACP, 0, lpbmp, -1, NULL, 0);
    lpbmpW = Alloc(len * sizeof(WCHAR));
    MultiByteToWideChar(CP_ACP, 0, lpbmp, -1, lpbmpW, len);

    himl = ImageList_LoadImageW(hi, lpbmpW, cx, cGrow, clrMask, uType, uFlags);
    Free (lpbmpW);
    return himl;
}


/*************************************************************************
 * ImageList_LoadImageW [COMCTL32.@]
 *
 * Creates an image list from a bitmap, icon or cursor.
 *
 * PARAMS
 *     hi      [I] instance handle
 *     lpbmp   [I] name or id of the image
 *     cx      [I] width of each image
 *     cGrow   [I] number of images to expand
 *     clrMask [I] mask color
 *     uType   [I] type of image to load
 *     uFlags  [I] loading flags
 *
 * RETURNS
 *     Success: handle to the loaded image list
 *     Failure: NULL
 *
 * SEE
 *     LoadImage ()
 */

HIMAGELIST WINAPI
ImageList_LoadImageW (HINSTANCE hi, LPCWSTR lpbmp, INT cx, INT cGrow,
                      COLORREF clrMask, UINT uType, UINT uFlags)
{
    HIMAGELIST himl = NULL;
    HANDLE   handle;
    INT      nImageCount;

    handle = LoadImageW (hi, lpbmp, uType, 0, 0, uFlags);
    if (!handle) {
        ERR("Error loading image!\n");
        return NULL;
    }

    if (uType == IMAGE_BITMAP) {
        BITMAP bmp;
        GetObjectW (handle, sizeof(BITMAP), &bmp);

        /* To match windows behavior, if cx is set to zero and
         the flag DI_DEFAULTSIZE is specified, cx becomes the
         system metric value for icons. If the flag is not specified
         the function sets the size to the height of the bitmap */
        if (cx == 0)
        {
            if (uFlags & DI_DEFAULTSIZE)
                cx = GetSystemMetrics (SM_CXICON);
            else
                cx = bmp.bmHeight;
        }

        nImageCount = bmp.bmWidth / cx;

        himl = ImageList_Create (cx, bmp.bmHeight, ILC_MASK | ILC_COLOR,
                                 nImageCount, cGrow);
        if (!himl) {
            DeleteObject (handle);
            return NULL;
        }
        ImageList_AddMasked (himl, (HBITMAP)handle, clrMask);
    }
    else if ((uType == IMAGE_ICON) || (uType == IMAGE_CURSOR)) {
        ICONINFO ii;
        BITMAP bmp;

        GetIconInfo (handle, &ii);
        GetObjectW (ii.hbmColor, sizeof(BITMAP), (LPVOID)&bmp);
        himl = ImageList_Create (bmp.bmWidth, bmp.bmHeight,
                                 ILC_MASK | ILC_COLOR, 1, cGrow);
        if (!himl) {
            DeleteObject (ii.hbmColor);
            DeleteObject (ii.hbmMask);
            DeleteObject (handle);
            return NULL;
        }
        ImageList_Add (himl, ii.hbmColor, ii.hbmMask);
        DeleteObject (ii.hbmColor);
        DeleteObject (ii.hbmMask);
    }

    DeleteObject (handle);

    return himl;
}


/*************************************************************************
 * ImageList_Merge [COMCTL32.@]
 *
 * Create an image list containing a merged image from two image lists.
 *
 * PARAMS
 *     himl1 [I] handle to first image list
 *     i1    [I] first image index
 *     himl2 [I] handle to second image list
 *     i2    [I] second image index
 *     dx    [I] X offset of the second image relative to the first.
 *     dy    [I] Y offset of the second image relative to the first.
 *
 * RETURNS
 *     Success: The newly created image list. It contains a single image
 *              consisting of the second image merged with the first.
 *     Failure: NULL, if either himl1 or himl2 are invalid.
 *
 * NOTES
 *   - The returned image list should be deleted by the caller using
 *     ImageList_Destroy() when it is no longer required.
 *   - If either i1 or i2 are not valid image indices they will be treated
 *     as a blank image.
 */
HIMAGELIST WINAPI
ImageList_Merge (HIMAGELIST himl1, INT i1, HIMAGELIST himl2, INT i2,
		 INT dx, INT dy)
{
    HIMAGELIST himlDst = NULL;
    INT      cxDst, cyDst;
    INT      xOff1, yOff1, xOff2, yOff2;
    INT      nX1, nX2;

    TRACE("(himl1=%p i1=%d himl2=%p i2=%d dx=%d dy=%d)\n", himl1, i1, himl2,
	   i2, dx, dy);

    if (!is_valid(himl1) || !is_valid(himl2))
	return NULL;

    if (dx > 0) {
        cxDst = max (himl1->cx, dx + himl2->cx);
        xOff1 = 0;
        xOff2 = dx;
    }
    else if (dx < 0) {
        cxDst = max (himl2->cx, himl1->cx - dx);
        xOff1 = -dx;
        xOff2 = 0;
    }
    else {
        cxDst = max (himl1->cx, himl2->cx);
        xOff1 = 0;
        xOff2 = 0;
    }

    if (dy > 0) {
        cyDst = max (himl1->cy, dy + himl2->cy);
        yOff1 = 0;
        yOff2 = dy;
    }
    else if (dy < 0) {
        cyDst = max (himl2->cy, himl1->cy - dy);
        yOff1 = -dy;
        yOff2 = 0;
    }
    else {
        cyDst = max (himl1->cy, himl2->cy);
        yOff1 = 0;
        yOff2 = 0;
    }

    himlDst = ImageList_Create (cxDst, cyDst, ILC_MASK | ILC_COLOR, 1, 1);

    if (himlDst)
    {
        nX1 = i1 * himl1->cx;
        nX2 = i2 * himl2->cx;

        /* copy image */
        BitBlt (himlDst->hdcImage, 0, 0, cxDst, cyDst, himl1->hdcImage, 0, 0, BLACKNESS);
        if (i1 >= 0 && i1 < himl1->cCurImage)
            BitBlt (himlDst->hdcImage, xOff1, yOff1, himl1->cx, himl1->cy, himl1->hdcImage, nX1, 0, SRCCOPY);
        if (i2 >= 0 && i2 < himl2->cCurImage)
        {
            BitBlt (himlDst->hdcImage, xOff2, yOff2, himl2->cx, himl2->cy, himl2->hdcMask , nX2, 0, SRCAND);
            BitBlt (himlDst->hdcImage, xOff2, yOff2, himl2->cx, himl2->cy, himl2->hdcImage, nX2, 0, SRCPAINT);
        }

        /* copy mask */
        BitBlt (himlDst->hdcMask, 0, 0, cxDst, cyDst, himl1->hdcMask, 0, 0, WHITENESS);
        if (i1 >= 0 && i1 < himl1->cCurImage)
            BitBlt (himlDst->hdcMask,  xOff1, yOff1, himl1->cx, himl1->cy, himl1->hdcMask,  nX1, 0, SRCCOPY);
        if (i2 >= 0 && i2 < himl2->cCurImage)
            BitBlt (himlDst->hdcMask,  xOff2, yOff2, himl2->cx, himl2->cy, himl2->hdcMask,  nX2, 0, SRCAND);

	himlDst->cCurImage = 1;
    }

    return himlDst;
}


/* helper for _read_bitmap currently unused */
#if 0
static int may_use_dibsection(HDC hdc) {
    int bitspixel = GetDeviceCaps(hdc,BITSPIXEL)*GetDeviceCaps(hdc,PLANES);
    if (bitspixel>8)
	return TRUE;
    if (bitspixel<=4)
	return FALSE;
    return GetDeviceCaps(hdc,CAPS1) & C1_DIBENGINE;
}
#endif

/* helper for ImageList_Read, see comments below */
static HBITMAP _read_bitmap(LPSTREAM pstm,int ilcFlag,int cx,int cy) {
    HDC                        xdc = 0, hBitmapDC =0;
    BITMAPFILEHEADER	bmfh;
    BITMAPINFOHEADER	bmih;
    int			bitsperpixel,palspace,longsperline,width,height;
    LPBITMAPINFOHEADER	bmihc = NULL;
    int			result = 0;
    HBITMAP            hbitmap = 0, hDIB = 0;
    LPBYTE             bits = NULL;