C++ GetRegionData函数代码示例

void
_cairo_win32_debug_dump_hrgn (HRGN rgn, char *header)
{
    RGNDATA *rd;
    unsigned int z;

    if (header)
	fprintf (stderr, "%s\n", header);

    if (rgn == NULL) {
	fprintf (stderr, " NULL\n");
    }

    z = GetRegionData(rgn, 0, NULL);
    rd = (RGNDATA*) _cairo_malloc (z);
    z = GetRegionData(rgn, z, rd);

    fprintf (stderr, " %ld rects, bounds: %ld %ld %ld %ld\n",
	     rd->rdh.nCount,
	     rd->rdh.rcBound.left,
	     rd->rdh.rcBound.top,
	     rd->rdh.rcBound.right - rd->rdh.rcBound.left,
	     rd->rdh.rcBound.bottom - rd->rdh.rcBound.top);

    for (z = 0; z < rd->rdh.nCount; z++) {
	RECT r = ((RECT*)rd->Buffer)[z];
	fprintf (stderr, " [%d]: [%ld %ld %ld %ld]\n",
		 z, r.left, r.top, r.right - r.left, r.bottom - r.top);
    }

    free(rd);
    fflush (stderr);
}

// Return all the rectangles
BOOL vncRegion::Rectangles(rectlist &rects)
{
	int buffsize;
	DWORD x;
	RGNDATA *buff;

	// If the region is empty then return empty rectangle list
	if (region == NULL)
		return FALSE;

	// Get the size of buffer required
	buffsize = GetRegionData(region, NULL, 0);
	buff = (RGNDATA *) new BYTE [buffsize];
	if (buff == NULL)
		return FALSE;

	// Now get the region data
	if (GetRegionData(region, buffsize, buff))
	{
		for (x=0; x<(buff->rdh.nCount); x++)
		{
			// Obtain the rectangles from the list
			RECT *rect = (RECT *) (((BYTE *) buff) + sizeof(RGNDATAHEADER) + x * sizeof(RECT));
			rects.push_front(*rect);
		}
	}

	// Delete the temporary buffer
	delete [] buff;

	// Return whether there are any rects!
	return !rects.empty();
}

void DSObjects::ExtractRects(REGION* pRegion)
{
	LPRGNDATA lpRgnData;

	DWORD sizeNeeed = GetRegionData((HRGN)pRegion->pOSRegion, 0, NULL); 

	lpRgnData = (LPRGNDATA)new char[sizeNeeed];
	DWORD returnValue = GetRegionData((HRGN)pRegion->pOSRegion, sizeNeeed, lpRgnData); 

	PN_VECTOR_DELETE(pRegion->rects);

	pRegion->numRects		= lpRgnData->rdh.nCount;
	pRegion->extents.left	= lpRgnData->rdh.rcBound.left;
	pRegion->extents.top	= lpRgnData->rdh.rcBound.top;
	pRegion->extents.right	= lpRgnData->rdh.rcBound.right;
	pRegion->extents.bottom	= lpRgnData->rdh.rcBound.bottom;
	
	if(lpRgnData->rdh.nCount)
	{
		pRegion->rects = new PNxRect[lpRgnData->rdh.nCount];

		// now extract the information.

		for(int j = 0; j < (int) lpRgnData->rdh.nCount;j++)
		{
			RECT* pRect = (RECT*)lpRgnData->Buffer;
			pRegion->rects[j].left = pRect[j].left;
			pRegion->rects[j].top = pRect[j].top;
			pRegion->rects[j].right = pRect[j].right;
			pRegion->rects[j].bottom = pRect[j].bottom;
		}
	}

	PN_VECTOR_DELETE(lpRgnData);
}

/***********************************************************************
 *           PSDRV_PaintRgn
 */
BOOL PSDRV_PaintRgn( PHYSDEV dev, HRGN hrgn )
{
    RGNDATA *rgndata = NULL;
    RECT *pRect;
    DWORD size, i;

    TRACE("hdc=%p\n", dev->hdc);

    size = GetRegionData(hrgn, 0, NULL);
    rgndata = HeapAlloc( GetProcessHeap(), 0, size );
    if(!rgndata) {
        ERR("Can't allocate buffer\n");
        return FALSE;
    }
    
    GetRegionData(hrgn, size, rgndata);
    if (rgndata->rdh.nCount == 0)
        goto end;

    LPtoDP(dev->hdc, (POINT*)rgndata->Buffer, rgndata->rdh.nCount * 2);

    PSDRV_SetClip(dev);
    for(i = 0, pRect = (RECT*)rgndata->Buffer; i < rgndata->rdh.nCount; i++, pRect++)
        PSDRV_WriteRectangle(dev, pRect->left, pRect->top, pRect->right - pRect->left, pRect->bottom - pRect->top);

    PSDRV_Brush(dev, 0);
    PSDRV_WriteNewPath(dev);
    PSDRV_ResetClip(dev);

 end:
    HeapFree(GetProcessHeap(), 0, rgndata);
    return TRUE;
}

/*********************************************************************
 *          EMFDRV_FrameRgn
 */
BOOL EMFDRV_FrameRgn( PHYSDEV dev, HRGN hrgn, HBRUSH hbrush, INT width, INT height )
{
    EMRFRAMERGN *emr;
    DWORD size, rgnsize, index;
    BOOL ret;

    index = EMFDRV_CreateBrushIndirect( dev, hbrush );
    if(!index) return FALSE;

    rgnsize = GetRegionData( hrgn, 0, NULL );
    size = rgnsize + offsetof(EMRFRAMERGN,RgnData);
    emr = HeapAlloc( GetProcessHeap(), 0, size );

    GetRegionData( hrgn, rgnsize, (RGNDATA *)&emr->RgnData );

    emr->emr.iType = EMR_FRAMERGN;
    emr->emr.nSize = size;
    emr->rclBounds.left   = ((RGNDATA *)&emr->RgnData)->rdh.rcBound.left;
    emr->rclBounds.top    = ((RGNDATA *)&emr->RgnData)->rdh.rcBound.top;
    emr->rclBounds.right  = ((RGNDATA *)&emr->RgnData)->rdh.rcBound.right - 1;
    emr->rclBounds.bottom = ((RGNDATA *)&emr->RgnData)->rdh.rcBound.bottom - 1;
    emr->cbRgnData = rgnsize;
    emr->ihBrush = index;
    emr->szlStroke.cx = width;
    emr->szlStroke.cy = height;

    ret = EMFDRV_WriteRecord( dev, &emr->emr );
    if(ret)
        EMFDRV_UpdateBBox( dev, &emr->rclBounds );
    HeapFree( GetProcessHeap(), 0, emr );
    return ret;
}

QRegion qt_region_from_HRGN(HRGN rgn)
{
    int numBytes = GetRegionData(rgn, 0, 0);
    if (numBytes == 0)
        return QRegion();

    char *buf = new char[numBytes];
    if (buf == 0)
        return QRegion();

    RGNDATA *rd = reinterpret_cast<RGNDATA*>(buf);
    if (GetRegionData(rgn, numBytes, rd) == 0) {
        delete [] buf;
        return QRegion();
    }

    QRegion region;
    RECT *r = reinterpret_cast<RECT*>(rd->Buffer);
    for (uint i = 0; i < rd->rdh.nCount; ++i) {
        QRect rect;
        rect.setCoords(r->left, r->top, r->right - 1, r->bottom - 1);
        ++r;
        region |= rect;
    }

    delete [] buf;

    return region;
}

/*********************************************************************
 *          EMFDRV_PaintInvertRgn
 *
 * Helper for EMFDRV_{Paint|Invert}Rgn
 */
static BOOL EMFDRV_PaintInvertRgn( PHYSDEV dev, HRGN hrgn, DWORD iType )
{
    EMRINVERTRGN *emr;
    DWORD size, rgnsize;
    BOOL ret;


    rgnsize = GetRegionData( hrgn, 0, NULL );
    size = rgnsize + offsetof(EMRINVERTRGN,RgnData);
    emr = HeapAlloc( GetProcessHeap(), 0, size );

    GetRegionData( hrgn, rgnsize, (RGNDATA *)&emr->RgnData );

    emr->emr.iType = iType;
    emr->emr.nSize = size;
    emr->rclBounds.left   = ((RGNDATA *)&emr->RgnData)->rdh.rcBound.left;
    emr->rclBounds.top    = ((RGNDATA *)&emr->RgnData)->rdh.rcBound.top;
    emr->rclBounds.right  = ((RGNDATA *)&emr->RgnData)->rdh.rcBound.right - 1;
    emr->rclBounds.bottom = ((RGNDATA *)&emr->RgnData)->rdh.rcBound.bottom - 1;
    emr->cbRgnData = rgnsize;

    ret = EMFDRV_WriteRecord( dev, &emr->emr );
    if(ret)
        EMFDRV_UpdateBBox( dev, &emr->rclBounds );
    HeapFree( GetProcessHeap(), 0, emr );
    return ret;
}

///////////////////////////////////////////////////////////////////
// InflateRegion - Inflates a region by the x and y values
// specified in nXInflate and nYInflate
// Creates a new region that represents the inflated region
// (retains the contents of the old region)
// Returns NULL if unsuccessfull
static HRGN InflateRegion(HRGN hRgn, int nXInflate, int nYInflate)
{
	// Local Variables
	LPRGNDATA lpData;	// The RGNDATA structure
	LPRECT lpRect;		// Pointer to the array of RECT structures
	DWORD BufSize;		// The amount of memory required
	DWORD i;			// General index variable
	HRGN hRgnNew;		// The newly created region

	// Get the number of rectangles in the region
	BufSize = GetRegionData(hRgn, 0, NULL);
	if(BufSize == 0)
		return NULL;
	// Allocate memory for the RGNDATA structure
	lpData = (LPRGNDATA)malloc(BufSize);
	// Set the location of the RECT structures
	lpRect = (LPRECT)(lpData->Buffer);
	// Get the region data
	if(!GetRegionData(hRgn, BufSize, lpData))
	{
		free(lpData);
		return NULL;
	}
	// Expand (or contract) all the rectangles in the data
	for(i=0; i<lpData->rdh.nCount; i++)
		InflateRect(&lpRect[i], nXInflate, nYInflate);
	// Create the new region
	hRgnNew = ExtCreateRegion(NULL, lpData->rdh.nCount, lpData);
	free((void*)lpData);
	return hRgnNew;
}

void VBoxSeamlessCheckWindows()
{
    VBOX_ENUM_PARAM param;

    param.hdc       = GetDC(HWND_DESKTOP);
    param.hrgn      = 0;

    EnumWindows(VBoxEnumFunc, (LPARAM)&param);

    if (param.hrgn)
    {
        DWORD cbSize;

        cbSize = GetRegionData(param.hrgn, 0, NULL);
        if (cbSize)
        {
            PVBOXDISPIFESCAPE lpEscapeData = (PVBOXDISPIFESCAPE)malloc(VBOXDISPIFESCAPE_SIZE(cbSize));
            if (lpEscapeData)
            {
                lpEscapeData->escapeCode = VBOXESC_SETVISIBLEREGION;
                LPRGNDATA lpRgnData = VBOXDISPIFESCAPE_DATA(lpEscapeData, RGNDATA);
                memset(lpRgnData, 0, cbSize);
                cbSize = GetRegionData(param.hrgn, cbSize, lpRgnData);
                if (cbSize)
                {
#ifdef DEBUG
                    RECT *lpRect = (RECT *)&lpRgnData->Buffer[0];
                    Log(("VBoxTray: New visible region: \n"));

                    for (DWORD i=0;i<lpRgnData->rdh.nCount;i++)
                    {
                        Log(("VBoxTray: visible rect (%d,%d)(%d,%d)\n", lpRect[i].left, lpRect[i].top, lpRect[i].right, lpRect[i].bottom));
                    }
#endif
                    LPRGNDATA lpCtxRgnData = VBOXDISPIFESCAPE_DATA(gCtx.lpEscapeData, RGNDATA);
                    if (    !gCtx.lpEscapeData
                        ||  (lpCtxRgnData->rdh.dwSize + lpCtxRgnData->rdh.nRgnSize != cbSize)
                        ||  memcmp(lpCtxRgnData, lpRgnData, cbSize))
                    {
                        /* send to display driver */
                        VBoxDispIfEscape(&gCtx.pEnv->dispIf, lpEscapeData, cbSize);

                        if (gCtx.lpEscapeData)
                            free(gCtx.lpEscapeData);
                        gCtx.lpEscapeData = lpEscapeData;
                    }
                    else
                        Log(("VBoxTray: Visible rectangles haven't changed; ignore\n"));
                }
                if (lpEscapeData != gCtx.lpEscapeData)
                    free(lpEscapeData);
            }
        }

        DeleteObject(param.hrgn);
    }

    ReleaseDC(HWND_DESKTOP, param.hdc);
}

void KLogWindow::DumpRegion(const char * mess, HRGN hRgn, bool detail, int p1)
{
	if ( mess )
		Log(mess, p1);

	if ( hRgn==NULL )
		Log(" NULL");
	else
	{
		RECT rect;

		memset(& rect, 0, sizeof(rect));
	
		switch ( GetRgnBox(hRgn, & rect) )
		{
			case NULLREGION: 
				Log(" NULLREGION "); break;

			case SIMPLEREGION:
				Log(" SIMPLEREGION "); break;

			case COMPLEXREGION:
				Log(" COMPLEXREGION "); break;

			default:
				Log(" Error "); break;
		}

		Log(" RgnBox=[%d, %d, %d, %d) ", rect.left, rect.top, rect.right, rect.bottom);

		int size = GetRegionData(hRgn, 0, NULL);
		int rectcount = 0;

		if ( size )
		{
			RGNDATA * pRegion = (RGNDATA *) new char[size];
			GetRegionData(hRgn, size, pRegion);

			const RECT * pRect = (const RECT *) & pRegion->Buffer;
			rectcount = pRegion->rdh.nCount;

			Log("%d rectangles", rectcount);

			if ( detail )
			{
				Log("\r\n");
				for (unsigned i=0; i<pRegion->rdh.nCount; i++)
					Log("rect %d [%d, %d, %d, %d)\r\n", i, pRect[i].left, pRect[i].top, pRect[i].right, pRect[i].bottom);
			}

			delete [] (char *) pRegion;
		}
		else
			Log("0 rectangle");
	}

	Log("\r\n");
}

static GpStatus get_region_scans_data(GpRegion *region, GpMatrix *matrix, LPRGNDATA *data)
{
    GpRegion *region_copy;
    GpStatus stat;
    HRGN hrgn;
    DWORD data_size;

    stat = GdipCloneRegion(region, &region_copy);

    if (stat == Ok)
    {
        stat = GdipTransformRegion(region_copy, matrix);

        if (stat == Ok)
            stat = GdipGetRegionHRgn(region_copy, NULL, &hrgn);

        if (stat == Ok)
        {
            if (hrgn)
            {
                data_size = GetRegionData(hrgn, 0, NULL);

                *data = heap_alloc_zero(data_size);

                if (*data)
                    GetRegionData(hrgn, data_size, *data);
                else
                    stat = OutOfMemory;

                DeleteObject(hrgn);
            }
            else
            {
                data_size = sizeof(RGNDATAHEADER) + sizeof(RECT);

                *data = heap_alloc_zero(data_size);

                if (*data)
                {
                    (*data)->rdh.dwSize = sizeof(RGNDATAHEADER);
                    (*data)->rdh.iType = RDH_RECTANGLES;
                    (*data)->rdh.nCount = 1;
                    (*data)->rdh.nRgnSize = sizeof(RECT);
                    (*data)->rdh.rcBound.left = (*data)->rdh.rcBound.top = -0x400000;
                    (*data)->rdh.rcBound.right = (*data)->rdh.rcBound.bottom = 0x400000;

                    memcpy((*data)->Buffer, &(*data)->rdh.rcBound, sizeof(RECT));
                }
                else
                    stat = OutOfMemory;
            }
        }

        GdipDeleteRegion(region_copy);
    }

    return stat;
}

static void verify_region(HRGN hrgn, const RECT *rc)
{
    union
    {
        RGNDATA data;
        char buf[sizeof(RGNDATAHEADER) + sizeof(RECT)];
    } rgn;
    const RECT *rect;
    DWORD ret;

    ret = GetRegionData(hrgn, 0, NULL);
    if (IsRectEmpty(rc))
        ok(ret == sizeof(rgn.data.rdh), "expected sizeof(rdh), got %u\n", ret);
    else
        ok(ret == sizeof(rgn.data.rdh) + sizeof(RECT), "expected sizeof(rgn), got %u\n", ret);

    if (!ret) return;

    ret = GetRegionData(hrgn, sizeof(rgn), &rgn.data);
    if (IsRectEmpty(rc))
        ok(ret == sizeof(rgn.data.rdh), "expected sizeof(rdh), got %u\n", ret);
    else
        ok(ret == sizeof(rgn.data.rdh) + sizeof(RECT), "expected sizeof(rgn), got %u\n", ret);

    trace("size %u, type %u, count %u, rgn size %u, bound (%d,%d-%d,%d)\n",
          rgn.data.rdh.dwSize, rgn.data.rdh.iType,
          rgn.data.rdh.nCount, rgn.data.rdh.nRgnSize,
          rgn.data.rdh.rcBound.left, rgn.data.rdh.rcBound.top,
          rgn.data.rdh.rcBound.right, rgn.data.rdh.rcBound.bottom);
    if (rgn.data.rdh.nCount != 0)
    {
        rect = (const RECT *)rgn.data.Buffer;
        trace("rect (%d,%d-%d,%d)\n", rect->left, rect->top, rect->right, rect->bottom);
        ok(EqualRect(rect, rc), "rects don't match\n");
    }

    ok(rgn.data.rdh.dwSize == sizeof(rgn.data.rdh), "expected sizeof(rdh), got %u\n", rgn.data.rdh.dwSize);
    ok(rgn.data.rdh.iType == RDH_RECTANGLES, "expected RDH_RECTANGLES, got %u\n", rgn.data.rdh.iType);
    if (IsRectEmpty(rc))
    {
        ok(rgn.data.rdh.nCount == 0, "expected 0, got %u\n", rgn.data.rdh.nCount);
        ok(rgn.data.rdh.nRgnSize == 0 ||
           broken(rgn.data.rdh.nRgnSize == 168), /* NT4 */
           "expected 0, got %u\n", rgn.data.rdh.nRgnSize);
    }
    else
    {
        ok(rgn.data.rdh.nCount == 1, "expected 1, got %u\n", rgn.data.rdh.nCount);
        ok(rgn.data.rdh.nRgnSize == sizeof(RECT) ||
           broken(rgn.data.rdh.nRgnSize == 168), /* NT4 */
           "expected sizeof(RECT), got %u\n", rgn.data.rdh.nRgnSize);
    }
    ok(EqualRect(&rgn.data.rdh.rcBound, rc), "rects don't match\n");
}

QT_BEGIN_NAMESPACE


/*
    In Windows versions before Windows Vista CreateRectRgn - when called in a multi-threaded
    environment - might return an invalid handle. This function works around this limitation
    by verifying the handle with a quick GetRegionData() call and re-creates the region
    if necessary.
*/
HRGN qt_tryCreateRegion(QRegion::RegionType type, int left, int top, int right, int bottom)
{
    const int tries = 10;
    for (int i = 0; i < tries; ++i) {
        HRGN region;
        switch (type) {
        case QRegion::Rectangle:
            region = CreateRectRgn(left, top, right, bottom);
            break;
        case QRegion::Ellipse:
#ifndef Q_OS_WINCE
            region = CreateEllipticRgn(left, top, right, bottom);
#endif
            break;
        }
        if (region) {
            if (GetRegionData(region, 0, 0))
                return region;
            else
                DeleteObject(region);
        }
    }
    return 0;
}

void EditableMapObject::SetName(string name, int8_t langCode)
{
  strings::Trim(name);
  if (name.empty())
    return;

  ASSERT_NOT_EQUAL(StringUtf8Multilang::kDefaultCode, langCode,
                   ("Direct editing of default name is deprecated."));

  if (!Editor::Instance().OriginalFeatureHasDefaultName(GetID()))
  {
    const auto mwmInfo = GetID().m_mwmId.GetInfo();

    if (mwmInfo)
    {
      vector<int8_t> mwmLanguages;
      mwmInfo->GetRegionData().GetLanguages(mwmLanguages);

      if (CanUseAsDefaultName(langCode, mwmLanguages))
        m_name.AddString(StringUtf8Multilang::kDefaultCode, name);
    }
  }

  m_name.AddString(langCode, name);
}

std::string Info::GetBookmarkName()
{
  std::string bookmarkName;

  auto const mwmInfo = GetID().m_mwmId.GetInfo();
  if (mwmInfo)
  {
    bookmarkName = GetPreferredBookmarkStr(m_bookmarkData.m_customName, mwmInfo->GetRegionData());
    if (bookmarkName.empty())
      bookmarkName = GetPreferredBookmarkStr(m_bookmarkData.m_name, mwmInfo->GetRegionData());
  }

  if (bookmarkName.empty())
    bookmarkName = GetPreferredBookmarkName(m_bookmarkData);

  return bookmarkName;
}