imagelist.c

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

    HDC hdcBg;
    INT x, y;

    if (!is_valid(InternalDrag.himl))
        return FALSE;
    
    TRACE("bShow=0x%X!\n", bShow);

    /* DragImage is already visible/hidden */
    if ((InternalDrag.bShow && bShow) || (!InternalDrag.bShow && !bShow)) {
	return FALSE;
    }

    /* position of the origin of the DragImage */
    x = InternalDrag.x - InternalDrag.dxHotspot;
    y = InternalDrag.y - InternalDrag.dyHotspot;

    hdcDrag = GetDCEx (InternalDrag.hwnd, 0,
			 DCX_WINDOW | DCX_CACHE | DCX_LOCKWINDOWUPDATE);
    if (!hdcDrag) {
	return FALSE;
    }

    hdcBg = CreateCompatibleDC(hdcDrag);
    if (!InternalDrag.hbmBg) {
	InternalDrag.hbmBg = CreateCompatibleBitmap(hdcDrag,
		    InternalDrag.himl->cx, InternalDrag.himl->cy);
    }
    SelectObject(hdcBg, InternalDrag.hbmBg);

    if (bShow) {
	/* save the background */
	BitBlt(hdcBg, 0, 0, InternalDrag.himl->cx, InternalDrag.himl->cy,
	       hdcDrag, x, y, SRCCOPY);
	/* show the image */
	ImageList_InternalDragDraw(hdcDrag, x, y);
    } else {
	/* hide the image */
	BitBlt(hdcDrag, x, y, InternalDrag.himl->cx, InternalDrag.himl->cy,
	       hdcBg, 0, 0, SRCCOPY);
    }

    InternalDrag.bShow = !InternalDrag.bShow;

    DeleteDC(hdcBg);
    ReleaseDC (InternalDrag.hwnd, hdcDrag);
    return TRUE;
}


/*************************************************************************
 * ImageList_Draw [COMCTL32.@]
 *
 * Draws an image.
 *
 * PARAMS
 *     himl   [I] handle to image list
 *     i      [I] image index
 *     hdc    [I] handle to device context
 *     x      [I] x position
 *     y      [I] y position
 *     fStyle [I] drawing flags
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 *
 * SEE
 *     ImageList_DrawEx.
 */

BOOL WINAPI
ImageList_Draw (HIMAGELIST himl, INT i, HDC hdc, INT x, INT y, UINT fStyle)
{
    return ImageList_DrawEx (himl, i, hdc, x, y, 0, 0, 
		             CLR_DEFAULT, CLR_DEFAULT, fStyle);
}


/*************************************************************************
 * ImageList_DrawEx [COMCTL32.@]
 *
 * Draws an image and allows to use extended drawing features.
 *
 * PARAMS
 *     himl   [I] handle to image list
 *     i      [I] image index
 *     hdc    [I] handle to device context
 *     x      [I] X position
 *     y      [I] Y position
 *     dx     [I] X offset
 *     dy     [I] Y offset
 *     rgbBk  [I] background color
 *     rgbFg  [I] foreground color
 *     fStyle [I] drawing flags
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 *
 * NOTES
 *     Calls ImageList_DrawIndirect.
 *
 * SEE
 *     ImageList_DrawIndirect.
 */

BOOL WINAPI
ImageList_DrawEx (HIMAGELIST himl, INT i, HDC hdc, INT x, INT y,
		  INT dx, INT dy, COLORREF rgbBk, COLORREF rgbFg,
		  UINT fStyle)
{
    IMAGELISTDRAWPARAMS imldp;

    ZeroMemory (&imldp, sizeof(imldp));
    imldp.cbSize  = sizeof(imldp);
    imldp.himl    = himl;
    imldp.i       = i;
    imldp.hdcDst  = hdc,
    imldp.x       = x;
    imldp.y       = y;
    imldp.cx      = dx;
    imldp.cy      = dy;
    imldp.rgbBk   = rgbBk;
    imldp.rgbFg   = rgbFg;
    imldp.fStyle  = fStyle;

    return ImageList_DrawIndirect (&imldp);
}


/*************************************************************************
 * ImageList_DrawIndirect [COMCTL32.@]
 *
 * Draws an image using various parameters specified in pimldp.
 *
 * PARAMS
 *     pimldp [I] pointer to IMAGELISTDRAWPARAMS structure.
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
ImageList_DrawIndirect (IMAGELISTDRAWPARAMS *pimldp)
{
    INT cx, cy, lx, ly, nOvlIdx;
    DWORD fState, dwRop;
    UINT fStyle;
    COLORREF oldImageBk, oldImageFg;
    HDC hImageDC, hImageListDC, hMaskListDC;
    HBITMAP hImageBmp, hOldImageBmp, hBlendMaskBmp;
    BOOL bIsTransparent, bBlend, bResult = FALSE, bMask;
    HIMAGELIST himl;

    if (!pimldp || !(himl = pimldp->himl)) return FALSE;
    if (!is_valid(himl)) return FALSE;
    if ((pimldp->i < 0) || (pimldp->i >= himl->cCurImage)) return FALSE;

    lx = himl->cx * pimldp->i + pimldp->xBitmap;
    ly = pimldp->yBitmap;

    fState = pimldp->cbSize < sizeof(IMAGELISTDRAWPARAMS) ? ILS_NORMAL : pimldp->fState;
    fStyle = pimldp->fStyle & ~ILD_OVERLAYMASK;
    cx = (pimldp->cx == 0) ? himl->cx : pimldp->cx;
    cy = (pimldp->cy == 0) ? himl->cy : pimldp->cy;

    bIsTransparent = (fStyle & ILD_TRANSPARENT);
    if( pimldp->rgbBk == CLR_NONE )
        bIsTransparent = TRUE;
    if( ( pimldp->rgbBk == CLR_DEFAULT ) && ( himl->clrBk == CLR_NONE ) )
        bIsTransparent = TRUE;
    bMask = (himl->flags & ILC_MASK) && (fStyle & ILD_MASK) ;
    bBlend = (fStyle & (ILD_BLEND25 | ILD_BLEND50) ) && !bMask;

    TRACE("himl(%p) hbmMask(%p) iImage(%d) x(%d) y(%d) cx(%d) cy(%d)\n",
          himl, himl->hbmMask, pimldp->i, pimldp->x, pimldp->y, cx, cy);

    /* we will use these DCs to access the images and masks in the ImageList */
    hImageListDC = himl->hdcImage;
    hMaskListDC  = himl->hdcMask;

    /* these will accumulate the image and mask for the image we're drawing */
    hImageDC = CreateCompatibleDC( pimldp->hdcDst );
    hImageBmp = CreateCompatibleBitmap( pimldp->hdcDst, cx, cy );
    hBlendMaskBmp = bBlend ? CreateBitmap(cx, cy, 1, 1, NULL) : 0;

    /* Create a compatible DC. */
    if (!hImageListDC || !hImageDC || !hImageBmp ||
	(bBlend && !hBlendMaskBmp) || (himl->hbmMask && !hMaskListDC))
	goto cleanup;
    
    hOldImageBmp = SelectObject(hImageDC, hImageBmp);
  
    /*
     * To obtain a transparent look, background color should be set
     * to white and foreground color to black when blting the
     * monochrome mask.
     */
    oldImageFg = SetTextColor( hImageDC, RGB( 0, 0, 0 ) );
    oldImageBk = SetBkColor( hImageDC, RGB( 0xff, 0xff, 0xff ) );

    /*
     * Draw the initial image
     */
    if( bMask ) {
	if (himl->hbmMask) {
            HBRUSH hOldBrush;
            hOldBrush = SelectObject (hImageDC, CreateSolidBrush (GetTextColor(pimldp->hdcDst)));
            PatBlt( hImageDC, 0, 0, cx, cy, PATCOPY );
            BitBlt(hImageDC, 0, 0, cx, cy, hMaskListDC, lx, ly, SRCPAINT);
            DeleteObject (SelectObject (hImageDC, hOldBrush));
            if( bIsTransparent )
            {
                BitBlt ( pimldp->hdcDst, pimldp->x,  pimldp->y, cx, cy, hImageDC, 0, 0, SRCAND);
                bResult = TRUE;
                goto end;
            }
	} else {
	    HBRUSH hOldBrush = SelectObject (hImageDC, GetStockObject(BLACK_BRUSH));
	    PatBlt( hImageDC, 0, 0, cx, cy, PATCOPY);
	    SelectObject(hImageDC, hOldBrush);
	}
    } else {
	/* blend the image with the needed solid background */
        COLORREF colour = RGB(0,0,0);
        HBRUSH hOldBrush;

        if( !bIsTransparent )
        {
            colour = pimldp->rgbBk;
            if( colour == CLR_DEFAULT )
                colour = himl->clrBk;
            if( colour == CLR_NONE )
                colour = GetBkColor(pimldp->hdcDst);
        }

        hOldBrush = SelectObject (hImageDC, CreateSolidBrush (colour));
        PatBlt( hImageDC, 0, 0, cx, cy, PATCOPY );
        BitBlt( hImageDC, 0, 0, cx, cy, hMaskListDC, lx, ly, SRCAND );
        BitBlt( hImageDC, 0, 0, cx, cy, hImageListDC, lx, ly, SRCPAINT );
        DeleteObject (SelectObject (hImageDC, hOldBrush));
    }
  
    /* Time for blending, if required */
    if (bBlend) {
	HBRUSH hBlendBrush, hOldBrush;
        COLORREF clrBlend = pimldp->rgbFg;
	HDC hBlendMaskDC = hImageListDC;
	HBITMAP hOldBitmap;

	/* Create the blend Mask */
    	hOldBitmap = SelectObject(hBlendMaskDC, hBlendMaskBmp);
	hBlendBrush = fStyle & ILD_BLEND50 ? himl->hbrBlend50 : himl->hbrBlend25;
    	hOldBrush = (HBRUSH) SelectObject(hBlendMaskDC, hBlendBrush);
    	PatBlt(hBlendMaskDC, 0, 0, cx, cy, PATCOPY);
    	SelectObject(hBlendMaskDC, hOldBrush);

    	/* Modify the blend mask if an Image Mask exist */
    	if(himl->hbmMask) {
	    BitBlt(hBlendMaskDC, 0, 0, cx, cy, hMaskListDC, lx, ly, 0x220326); /* NOTSRCAND */
	    BitBlt(hBlendMaskDC, 0, 0, cx, cy, hBlendMaskDC, 0, 0, NOTSRCCOPY);
	}
	
	/* now apply blend to the current image given the BlendMask */
        if (clrBlend == CLR_DEFAULT) clrBlend = GetSysColor (COLOR_HIGHLIGHT);
        else if (clrBlend == CLR_NONE) clrBlend = GetTextColor (pimldp->hdcDst);
	hOldBrush = (HBRUSH) SelectObject (hImageDC, CreateSolidBrush(clrBlend));
	BitBlt (hImageDC, 0, 0, cx, cy, hBlendMaskDC, 0, 0, 0xB8074A); /* PSDPxax */
	DeleteObject(SelectObject(hImageDC, hOldBrush));
	SelectObject(hBlendMaskDC, hOldBitmap);
    }
    
    /* Now do the overlay image, if any */ 
    nOvlIdx = (pimldp->fStyle & ILD_OVERLAYMASK) >> 8;
    if ( (nOvlIdx >= 1) && (nOvlIdx <= MAX_OVERLAYIMAGE)) {
    	nOvlIdx = himl->nOvlIdx[nOvlIdx - 1];
    	if ((nOvlIdx >= 0) && (nOvlIdx < himl->cCurImage)) {
    	    const INT ox = himl->cx * nOvlIdx + pimldp->xBitmap;
	    if (himl->hbmMask && !(fStyle & ILD_IMAGE))
		BitBlt (hImageDC, 0, 0, cx, cy, hMaskListDC, ox, ly, SRCAND);
	    BitBlt (hImageDC, 0, 0, cx, cy, hImageListDC, ox, ly, SRCPAINT);
	}
    }

    if (fState & ILS_SATURATE) FIXME("ILS_SATURATE: unimplemented!\n");
    if (fState & ILS_GLOW) FIXME("ILS_GLOW: unimplemented!\n");
    if (fState & ILS_SHADOW) FIXME("ILS_SHADOW: unimplemented!\n");
    if (fState & ILS_ALPHA) FIXME("ILS_ALPHA: unimplemented!\n");

    if (fStyle & ILD_PRESERVEALPHA) FIXME("ILD_PRESERVEALPHA: unimplemented!\n");
    if (fStyle & ILD_SCALE) FIXME("ILD_SCALE: unimplemented!\n");
    if (fStyle & ILD_DPISCALE) FIXME("ILD_DPISCALE: unimplemented!\n");
    
    /* now copy the image to the screen */
    dwRop = SRCCOPY;
    if (himl->hbmMask && bIsTransparent ) {
	COLORREF oldDstFg = SetTextColor(pimldp->hdcDst, RGB( 0, 0, 0 ) );
	COLORREF oldDstBk = SetBkColor(pimldp->hdcDst, RGB( 0xff, 0xff, 0xff ));
        BitBlt (pimldp->hdcDst, pimldp->x,  pimldp->y, cx, cy, hMaskListDC, lx, ly, SRCAND);
	SetBkColor(pimldp->hdcDst, oldDstBk);
	SetTextColor(pimldp->hdcDst, oldDstFg);
	dwRop = SRCPAINT;
    }
    if (fStyle & ILD_ROP) dwRop = pimldp->dwRop;
    BitBlt (pimldp->hdcDst, pimldp->x,  pimldp->y, cx, cy, hImageDC, 0, 0, dwRop);

    bResult = TRUE;
end: 
    /* cleanup the mess */
    SetBkColor(hImageDC, oldImageBk);
    SetTextColor(hImageDC, oldImageFg);
    SelectObject(hImageDC, hOldImageBmp);
cleanup:
    DeleteObject(hBlendMaskBmp);
    DeleteObject(hImageBmp);
    DeleteDC(hImageDC);

    return bResult;
}


/*************************************************************************
 * ImageList_Duplicate [COMCTL32.@]
 *
 * Duplicates an image list.
 *
 * PARAMS
 *     himlSrc [I] source image list handle
 *
 * RETURNS
 *     Success: Handle of duplicated image list.
 *     Failure: NULL
 */

HIMAGELIST WINAPI
ImageList_Duplicate (HIMAGELIST himlSrc)
{
    HIMAGELIST himlDst;

    if (!is_valid(himlSrc)) {
        ERR("Invalid image list handle!\n");
        return NULL;
    }

    himlDst = ImageList_Create (himlSrc->cx, himlSrc->cy, himlSrc->flags,
                                himlSrc->cInitial, himlSrc->cGrow);

    if (himlDst)
    {
        BitBlt (himlDst->hdcImage, 0, 0, himlSrc->cCurImage * himlSrc->cx, himlSrc->cy,
                himlSrc->hdcImage, 0, 0, SRCCOPY);

        if (himlDst->hbmMask)
            BitBlt (himlDst->hdcMask, 0, 0, himlSrc->cCurImage * himlSrc->cx, himlSrc->cy,
                    himlSrc->hdcMask, 0, 0, SRCCOPY);

	himlDst->cCurImage = himlSrc->cCurImage;
	himlDst->cMaxImage = himlSrc->cMaxImage;
    }
    return himlDst;
}


/*************************************************************************
 * ImageList_EndDrag [COMCTL32.@]
 *
 * Finishes a drag operation.
 *
 * PARAMS
 *     no Parameters
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

VOID WINAPI
ImageList_EndDrag (void)
{
    /* cleanup the InternalDrag struct */
    InternalDrag.hwnd = 0;
    ImageList_Destroy (InternalDrag.himl);
    InternalDrag.himl = 0;
    InternalDrag.x= 0;
    InternalDrag.y= 0;
    InternalDrag.dxHotspot = 0;
    InternalDrag.dyHotspot = 0;
    InternalDrag.bShow = FALSE;
    DeleteObject(InternalDrag.hbmBg);
    InternalDrag.hbmBg = 0;
}


/*************************************************************************
 * ImageList_GetBkColor [COMCTL32.@]
 *
 * Returns the background color of an image list.
 *
 * PARAMS
 *     himl [I] Image list handle.
 *
 * RETURNS
 *     Success: background color
 *     Failure: CLR_NONE
 */

COLORREF WINAPI
ImageList_GetBkColor (HIMAGELIST himl)
{
    return himl ? himl->clrBk : CLR_NONE;
}


/*************************************************************************
 * ImageList_GetDragImage [COMCTL32.@]
 *
 * Returns the handle to the internal drag image list.
 *
 * PARAMS
 *     ppt        [O] Pointer to the drag position. Can be NULL.
 *     pptHotspot [O] Pointer to the position of the hot spot. Can be NULL.
 *
 * RETURNS
 *     Success: Handle of the drag image list.
 *     Failure: NULL.
 */

HIMAGELIST WINAPI
ImageList_GetDragImage (POINT *ppt, POINT *pptHotspot)
{
    if (is_valid(InternalDrag.himl)) {
	if (ppt) {
	    ppt->x = InternalDrag.x;
	    ppt->y = InternalDrag.y;
	}
	if (pptHotspot) {
	    pptHotspot->x = InternalDrag.dxHotspot;
	    pptHotspot->y = InternalDrag.dyHotspot;
	}
        return (InternalDrag.himl);
    }

    return NULL;
}


/*************************************************************************
 * ImageList_GetFlags [COMCTL32.@]
 *
 * Gets the flags of the specified image list.
 *
 * PARAMS
 *     himl [I] Handle to image list