C++ IntRect::width方法代码示例

static inline void _ewk_view_single_scroll_process_single(Ewk_View_Smart_Data* smartData, void* pixels, Evas_Coord width, Evas_Coord height, const WebCore::IntSize& scrollOffset, const WebCore::IntRect& rectToScroll)
{
    int scrollX = rectToScroll.x();
    int scrollY = rectToScroll.y();
    int scrollWidth = rectToScroll.width();
    int scrollHeight = rectToScroll.height();

    DBG("%d,%d + %d,%d %+03d,%+03d, store: %p %dx%d",
        scrollX, scrollY, scrollWidth, scrollHeight, scrollOffset.width(), scrollOffset.height(), pixels, width, height);

    if (abs(scrollOffset.width()) >= scrollWidth || abs(scrollOffset.height()) >= scrollHeight) {
        ewk_view_repaint_add(smartData->_priv, scrollX, scrollY, scrollWidth, scrollHeight);
        return;
    }

    if (scrollX < 0) {
        scrollWidth += scrollX;
        scrollX = 0;
    }
    if (scrollY < 0) {
        scrollHeight += scrollY;
        scrollY = 0;
    }

    if (scrollX + scrollWidth > width)
        scrollWidth = width - scrollX;
    if (scrollY + scrollHeight > height)
        scrollHeight = height - scrollY;

    if (scrollWidth <= 0 || scrollHeight <= 0)
        return;

    int sourceX = scrollOffset.width() < 0 ? abs(scrollOffset.width()) : 0;
    int sourceY = scrollOffset.height() < 0 ? abs(scrollOffset.height()) : 0;
    int destinationX = scrollOffset.width() < 0 ? 0 : scrollOffset.width();
    int destinationY = scrollOffset.height() < 0 ? 0 : scrollOffset.height();
    int copyWidth = scrollWidth - abs(scrollOffset.width());
    int copyHeight = scrollHeight - abs(scrollOffset.height());
    if (scrollOffset.width() || scrollOffset.height()) {
        _ewk_view_screen_move(static_cast<uint32_t*>(pixels), destinationX, destinationY, sourceX, sourceY, copyWidth, copyHeight, width);
        evas_object_image_data_update_add(smartData->backing_store, destinationX, destinationY, copyWidth, copyHeight);
    }

    Eina_Rectangle verticalUpdate;
    verticalUpdate.x = destinationX ? 0 : copyWidth - 1;
    verticalUpdate.y = 0;
    verticalUpdate.w = abs(scrollOffset.width());
    verticalUpdate.h = scrollHeight;
    if (verticalUpdate.w && verticalUpdate.h)
        ewk_view_repaint_add(smartData->_priv, verticalUpdate.x, verticalUpdate.y, verticalUpdate.w, verticalUpdate.h);

    Eina_Rectangle horizontalUpdate;
    horizontalUpdate.x = destinationX;
    horizontalUpdate.y = destinationY ? 0 : copyHeight - 1;
    horizontalUpdate.w = copyWidth;
    horizontalUpdate.h = abs(scrollOffset.height());
    if (horizontalUpdate.w && horizontalUpdate.h)
        ewk_view_repaint_add(smartData->_priv, horizontalUpdate.x, horizontalUpdate.y, horizontalUpdate.w, horizontalUpdate.h);
}

// Note:  This is the only function in SelectionHandler in which the coordinate
// system is not entirely WebKit.
void SelectionHandler::selectionPositionChanged()
{
    if (!m_selectionActive)
        return;

    // Get the transformed coordinates from the WebPage.
    WebCore::IntRect startCaret = m_webPage->selectionStartCaretRect();
    WebCore::IntRect endCaret = m_webPage->selectionEndCaretRect();

#if SHOWDEBUG_SELECTIONHANDLER
    Olympia::Platform::log(Olympia::Platform::LogLevelInfo, "SelectionHandler::selectionPositionChanged Start Rect %d, %d, %dx%d End Rect%d, %d, %dx%d",
                                   startCaret.x(), startCaret.y(), startCaret.width(), startCaret.height(),
                                   endCaret.x(), endCaret.y(), endCaret.width(), endCaret.height());
#endif

    m_webPage->m_client->selectionBounds(startCaret, endCaret);
}

WebCore::IntRect ChromeClient::windowToScreen(const WebCore::IntRect& windowPoint) const 
{
    HWND hwnd = m_webView ? m_webView->hostWindow() : NULL;
    if (!IsWindow(hwnd))
        return windowPoint;

    POINT tempPoint = { windowPoint.x(), windowPoint.y() };
    ClientToScreen(hwnd, &tempPoint);
    
    WebCore::IntRect screePoint(tempPoint.x, tempPoint.y, windowPoint.width(), windowPoint.height());
    return screePoint;
}

		bool DocumentNavigator::doAxisCheck(WebCore::IntRect rect)
		{
			
			int left = rect.x();
			int right = rect.x() + rect.width();
			int top = rect.y();
			int bottom = rect.y() + rect.height();

			//abaldeva: Feel like only one check is enough?
			//Fixes the navigation to the yahoo.com sports section link
			switch (mDirection)
			{
			case EA::WebKit::JumpRight:
				
				if(mStrictAxesCheck)
					return left >= mStartingPosition.x();
				else
					return !(left<mStartingPosition.x() && right<mStartingPosition.x());

				break;

			case EA::WebKit::JumpDown:
				if(mStrictAxesCheck)
					return top >= mStartingPosition.y();
				else
					return !(top<mStartingPosition.y() && bottom<mStartingPosition.y());
				
				break;

			case EA::WebKit::JumpLeft:
				if(mStrictAxesCheck)
					return right <= mStartingPosition.x();
				else
					return !(left>mStartingPosition.x() && right>mStartingPosition.x());
				
				break;

			case EA::WebKit::JumpUp:
				if(mStrictAxesCheck)
					return bottom <= mStartingPosition.y();
				else
					return !(top>mStartingPosition.y() && bottom>mStartingPosition.y());
				
				break;

			default:
				EAW_FAIL_MSG("Should not have got here\n");
			}

			return false;
		}

// Returns two point ranges (<left, width> pairs) at row 'canvasY', that belong to 'src' but not 'dst'.
// A point range is empty if the corresponding width is 0.
inline void findBlendRangeAtRow(const WebCore::IntRect& src, const WebCore::IntRect& dst, int canvasY, int& left1, int& width1, int& left2, int& width2)
{
    ASSERT_WITH_SECURITY_IMPLICATION(canvasY >= src.y() && canvasY < src.maxY());
    left1 = -1;
    width1 = 0;
    left2 = -1;
    width2 = 0;

    if (canvasY < dst.y() || canvasY >= dst.maxY() || src.x() >= dst.maxX() || src.maxX() <= dst.x()) {
        left1 = src.x();
        width1 = src.width();
        return;
    }

    if (src.x() < dst.x()) {
        left1 = src.x();
        width1 = dst.x() - src.x();
    }

    if (src.maxX() > dst.maxX()) {
        left2 = dst.maxX();
        width2 = src.maxX() - dst.maxX();
    }
}

void PageClientImpl::setViewNeedsDisplay(const WebCore::IntRect& rect)
{
    gtk_widget_queue_draw_area(m_viewWidget, rect.x(), rect.y(), rect.width(), rect.height());
}

void CachedNode::fixUpFocusRects()
{
    if (mFixedUpFocusRects)
        return;
    mFixedUpFocusRects = true;
    if (mNavableRects <= 1)
        return;
#if DEBUG_NAV_UI
    {
        WebCore::IntRect* boundsPtr = mFocusRing.begin() - 1;
        const WebCore::IntRect* const boundsEnd = mFocusRing.begin() + mFocusRing.size();
        while (++boundsPtr < boundsEnd)
            LOGD("%s %d:(%d, %d, %d, %d)\n", __FUNCTION__, boundsPtr - mFocusRing.begin(),
                boundsPtr->x(), boundsPtr->y(), boundsPtr->width(), boundsPtr->height());
    }
#endif
    // q: need to know when rects are for drawing and hit-testing, but not mouse down calcs?
    bool again;
    do {
        again = false;
        size_t size = mFocusRing.size();
        WebCore::IntRect* unitBoundsPtr = mFocusRing.begin() - 1;
        const WebCore::IntRect* const unitBoundsEnd = mFocusRing.begin() + size;
        while (++unitBoundsPtr < unitBoundsEnd) {
            // any other unitBounds to the left or right of this one?
            int unitTop = unitBoundsPtr->y();
            int unitBottom = unitBoundsPtr->bottom();
            int unitLeft = unitBoundsPtr->x();
            int unitRight = unitBoundsPtr->right();
            WebCore::IntRect* testBoundsPtr = mFocusRing.begin() - 1;
            while (++testBoundsPtr < unitBoundsEnd) {
                if (unitBoundsPtr == testBoundsPtr)
                    continue;
                int testTop = testBoundsPtr->y();
                int testBottom = testBoundsPtr->bottom();
                int testLeft = testBoundsPtr->x();
                int testRight = testBoundsPtr->right();
                int candidateTop = unitTop > testTop ? unitTop : testTop;
                int candidateBottom = unitBottom < testBottom ? unitBottom : testBottom;
                int candidateLeft = unitRight < testLeft ? unitRight : testRight;
                int candidateRight = unitRight > testLeft ? unitLeft : testLeft;
                bool leftRight = true;
                if (candidateTop + OVERLAP >= candidateBottom ||
                        candidateLeft + OVERLAP >= candidateRight) {
                    candidateTop = unitBottom < testTop ? unitBottom : testBottom;
                    candidateBottom = unitBottom > testTop ? unitTop : testTop;
                    candidateLeft = unitLeft > testLeft ? unitLeft : testLeft;
                    candidateRight = unitRight < testRight ? unitRight : testRight;
                    if (candidateTop + OVERLAP >= candidateBottom ||
                            candidateLeft + OVERLAP >= candidateRight)
                        continue;
                    leftRight = false;
                }
                // construct candidate to add
                WebCore::IntRect candidate = WebCore::IntRect(candidateLeft, candidateTop, 
                    candidateRight - candidateLeft, candidateBottom - candidateTop);
                // does a different unit bounds intersect the candidate? if so, don't add
                WebCore::IntRect* checkBoundsPtr = mFocusRing.begin() - 1;
                while (++checkBoundsPtr < unitBoundsEnd) {
                    if (checkBoundsPtr->intersects(candidate) == false)
                        continue;
                    if (leftRight) {
                        if (candidateTop >= checkBoundsPtr->y() &&
                                candidateBottom > checkBoundsPtr->bottom())
                            candidateTop = checkBoundsPtr->bottom(); 
                        else if (candidateTop < checkBoundsPtr->y() &&
                                candidateBottom <= checkBoundsPtr->bottom())
                            candidateBottom = checkBoundsPtr->y();
                        else
                            goto nextCheck;
                    } else {
                        if (candidateLeft >= checkBoundsPtr->x() &&
                                candidateRight > checkBoundsPtr->right())
                            candidateLeft = checkBoundsPtr->right(); 
                        else if (candidateLeft < checkBoundsPtr->x() &&
                                candidateRight <= checkBoundsPtr->right())
                            candidateRight = checkBoundsPtr->x();
                        else
                            goto nextCheck;
                    }
                 } 
                 candidate = WebCore::IntRect(candidateLeft, candidateTop, 
                    candidateRight - candidateLeft, candidateBottom - candidateTop);
                 ASSERT(candidate.isEmpty() == false);
#if DEBUG_NAV_UI
                LOGD("%s %d:(%d, %d, %d, %d)\n", __FUNCTION__, mFocusRing.size(),
                    candidate.x(), candidate.y(), candidate.width(), candidate.height());
#endif
                mFocusRing.append(candidate);
                again = true;
                goto tryAgain;
        nextCheck:
                continue;
            }
        }
tryAgain:
        ;
    } while (again);
}

void ChromeClient::invalidateWindow(const WebCore::IntRect& rect, bool immediate)
{
    m_webView->addDirtyArea(rect.x(), rect.y(), rect.width(), rect.height());
    //dbgMsg(L"invalidateWindow\n");
}

void ChromeClient::invalidateContentsForSlowScroll(const WebCore::IntRect& rect, bool immediate)
{
    m_webView->addDirtyArea(rect.x(), rect.y(), rect.width(), rect.height());
    //dbgMsg(L"invalidateContentsForSlowScroll\n");
}

void ViewNavigationDelegate::MoveMouseCursorToNode(WebCore::Node* node, bool scrollIfNecessary)
{
	if (node)
	{
		WebCore::HTMLElement* element = (WebCore::HTMLElement*)node;

		WebCore::IntRect rect = element->getRect();
		WebCore::IntPoint frameOffset;
		WebCore::IntPoint scrollOffset;

		WebCore::FrameView* pFrameView = element->document()->view(); //Can be NULL
		if(pFrameView)
		{
			//Use move here instead of setX/setY as it results in 1 call instead of two and takes advantage that ctor sets x,y to 0.
			frameOffset.move(pFrameView->x(), pFrameView->y());
			scrollOffset.move(pFrameView->scrollOffset().width(), pFrameView->scrollOffset().height());
		}

		int width = mView->GetSize().mWidth;
		int height = mView->GetSize().mHeight;

		// This will be true if this function is called from anywhere except JumpToNearestElement(). This enables us to not lose the cursor during
		// arbitrary jumping of elements from either code or webpage using the Navigation APIs.
		if(scrollIfNecessary)
		{
			int cursorX, cursorY;
			mView->GetCursorPosition(cursorX, cursorY);

			WebCore::IntPoint targetCursorLocation(frameOffset.x()+rect.x()+rect.width()/2  - scrollOffset.x(), frameOffset.y()+rect.y()+rect.height()/2  - scrollOffset.y());
			// Added 1 in all the line delta below resulting in a better visual behavior when the element happens to be at the edge.
			if(targetCursorLocation.y() > height)
			{
                float numLinesDelta = (((targetCursorLocation.y() - cursorY)/WebCore::Scrollbar::pixelsPerLineStep())+1);
				ScrollOnJump(true, -120, numLinesDelta);
			}
			if(targetCursorLocation.y()< 0.0f)
			{
				float numLinesDelta = (((cursorY - targetCursorLocation.y())/WebCore::Scrollbar::pixelsPerLineStep())+1);
				ScrollOnJump(true, 120, numLinesDelta);
			}
			if(targetCursorLocation.x() > width)
			{
				float numLinesDelta = (((targetCursorLocation.x() - cursorX)/WebCore::Scrollbar::pixelsPerLineStep())+1);
				ScrollOnJump(false, -120, numLinesDelta);
			}
			if(targetCursorLocation.x()< 0.0f)
			{
				float numLinesDelta = (((cursorX - targetCursorLocation.x())/WebCore::Scrollbar::pixelsPerLineStep())+1);
				ScrollOnJump(false, 120, numLinesDelta);
			}

			// Read the scroll offset again as it may have changed.
			if(pFrameView) 
			{
				scrollOffset.setX(pFrameView->scrollOffset().width());
				scrollOffset.setY(pFrameView->scrollOffset().height());
			}
		}

		mBestNodeFrame	= element->document()->frame(); //Can be NULL
		mBestNodeX		= frameOffset.x()  + rect.x();
		mBestNodeY		= frameOffset.y()  + rect.y();
		mBestNodeWidth	= rect.width();
		mBestNodeHeight = rect.height();

		int lastX, lastY;
		mView->GetCursorPosition(lastX, lastY);
		int newX		= mBestNodeX + rect.width()/2  - scrollOffset.x();
		int newY		= mBestNodeY + rect.height()/2 - scrollOffset.y();

		EA::WebKit::MouseMoveEvent moveEvent;
		memset( &moveEvent, 0, sizeof(moveEvent) );
		const int cursorInset = 5;// Make cursor stay inside 5 pixels from boundaries. No known issues but added this as a safety measure so that we do not lose cursor ever.
		moveEvent.mX	= Clamp( cursorInset, newX, width - cursorInset );
		moveEvent.mY	= Clamp( cursorInset, newY, height - cursorInset );

		mView->OnMouseMoveEvent( moveEvent );

		if(EAWebKitClient* const pClient = GetEAWebKitClient())
		{
			CursorMovedInfo cmInfo(mView, mView->GetUserData(), moveEvent.mX, moveEvent.mY);
			pClient->CursorMoved(cmInfo);
		}

		UpdateCachedHints(node);

	}
}

		void DocumentNavigator::FindBestNode(WebCore::Node* rootNode)
		{
			// Note by Arpit Baldeva - Changed the recursive algorithm to an iterative algorithm. This results in 25% to 40% increase in efficiency.
			
			while (rootNode) 
			{
				IsNodeNavigableDelegate nodeNavigableDelegate(mView);
				// As it turns out, getRect on HTMLElement is pretty expensive. So we don't do it inside the delegate as we require getRect here too. We do that check here.
				// It is at least ~15% more efficient and can be up to ~25% more efficient (depends on the page layout and current node you are at).
				nodeNavigableDelegate(rootNode,false);

				if (nodeNavigableDelegate.FoundNode())
				{
					WebCore::HTMLElement* htmlElement = (WebCore::HTMLElement*) rootNode;
					WebCore::IntRect rectAbsolute = htmlElement->getRect();		
					// Adjust the rectangle position based on the frame offset so that we have absolute geometrical position.
					WebCore::FrameView* pFrameView = htmlElement->document()->view(); //Can be NULL
					if(pFrameView)
					{
						rectAbsolute.setX(rectAbsolute.x() + pFrameView->x());
						rectAbsolute.setY(rectAbsolute.y() + pFrameView->y());
					}

					 /* printf("Looking at ELEMENT_NODE : nodeName=%S (%d,%d)->(%d,%d) ThetaRange(%f,%f)\n\n%S\n-----------------------------------\n", 
											htmlElement->tagName().charactersWithNullTermination(),
											rect.topLeft().x(),rect.topLeft().y(),
											rect.bottomRight().x(), rect.bottomRight().y(),
											mMinThetaRange,mMaxThetaRange,
											htmlElement->innerHTML().charactersWithNullTermination()
											);
										*/

					if (!WouldBeTrappedInElement(rectAbsolute,mStartingPosition,mDirection))
					{
						if (!TryingToDoPerpendicularJump(rectAbsolute,mPreviousNodeRect,mDirection))
						{
							if(rectAbsolute.width()>=1 && rectAbsolute.height() >= 1) //Avoid 0 size elements
							{
								if (doAxisCheck(rectAbsolute))
								{
									PolarRegion pr(rectAbsolute, mStartingPosition);

									if (pr.minR < mMinR )
									{
										if (areAnglesInRange(pr.minTheta,pr.maxTheta))
										{
											mMinR = pr.minR;

											EAW_ASSERT( *(uint32_t*)rootNode > 10000000u );

											//mBestNode = rootNode; //We don't assign it here since we do the Z-layer testing later on.
											FoundNodeInfo foundNodeInfo = {rootNode, mMinR};
											mNodeListContainer->mFoundNodes.push_back(foundNodeInfo);
											/*printf("Found ELEMENT_NODE : nodeName=%s (%d,%d)->(%d,%d) polar: R(%f,%f) Theta(%f,%f) ThetaRange(%f,%f)  \n", 
											(char*)htmlElement->nodeName().characters(),
											rect.topLeft().x(),rect.topLeft().y(),
											rect.bottomRight().x(), rect.bottomRight().y(),
											pr.minR,pr.maxR,pr.minTheta,pr.maxTheta,
											mMinThetaRange,mMaxThetaRange
											);*/
											
										} 
										else
										{
											
#if EAWEBKIT_ENABLE_JUMP_NAVIGATION_DEBUGGING
											mNodeListContainer->mRejectedByAngleNodes.push_back(rootNode);
#endif
											/*printf("RejectedA ELEMENT_NODE : nodeName=%s (%d,%d)->(%d,%d) polar: R(%f,%f) Theta(%f,%f) ThetaRange(%f,%f)  \n", 
											(char*)htmlElement->nodeName().characters(),
											rect.topLeft().x(),rect.topLeft().y(),
											rect.bottomRight().x(), rect.bottomRight().y(),
											pr.minR,pr.maxR,pr.minTheta,pr.maxTheta,
											mMinThetaRange,mMaxThetaRange
											);*/
										}
									} 
									else
									{
#if EAWEBKIT_ENABLE_JUMP_NAVIGATION_DEBUGGING
										mNodeListContainer->mRejectedByRadiusNodes.push_back(rootNode);
#endif
										/*printf("RejectedR ELEMENT_NODE : nodeName=%s (%d,%d)->(%d,%d) polar: R(%f,%f) Theta(%f,%f) ThetaRange(%f,%f)  \n", 
										(char*)htmlElement->nodeName().characters(),
										rect.topLeft().x(),rect.topLeft().y(),
										rect.bottomRight().x(), rect.bottomRight().y(),
										pr.minR,pr.maxR,pr.minTheta,pr.maxTheta,
										mMinThetaRange,mMaxThetaRange
										);*/
									}
								}
								else
								{
									//printf(" - failed axis check\n");
								}
							}
							else
							{
								//printf(" - too small\n");
							}
//.........这里部分代码省略.........

void BackingStoreScrollbar::repaint(const WebCore::IntRect& hotRect, bool vertical)
{
    SurfaceOpenVG* surface = SurfacePool::globalSurfacePool()->tileRenderingSurface();
    const IntSize surfaceSize(surface->width(), surface->height());
    PainterOpenVG painter(surface);

    // If the rendering surface is smaller than the scrollbar
    // (e.g. when the screen is rotated), paint it multiple times.
    int lastXTile = (m_size.width() - 1) / surfaceSize.width();
    int lastYTile = (m_size.height() - 1) / surfaceSize.height();

    FloatRect innerRect = hotRect;
    innerRect.move(0.5, 0.5); // draw it pixel-perfect with a 1.0 wide stroke
    int radius = vertical ? hotRect.width() / 2 : hotRect.height() / 2;
    if (vertical)
        innerRect.inflateY(-radius);
    else
        innerRect.inflateX(-radius);

    Path path;

    if (vertical) {
        path.moveTo(FloatPoint(innerRect.x(), innerRect.y()));
        path.addArc(FloatPoint(innerRect.x() + radius, innerRect.y()), radius, piFloat, 0, false);
        path.addLineTo(FloatPoint(innerRect.right(), innerRect.bottom()));
        path.addArc(FloatPoint(innerRect.x() + radius, innerRect.bottom()), radius, 0, piFloat, false);
        path.closeSubpath();
    } else {
        path.moveTo(FloatPoint(innerRect.right(), innerRect.y()));
        path.addArc(FloatPoint(innerRect.right(), innerRect.y() + radius), radius, piFloat + piFloat / 2, piFloat / 2, false);
        path.addLineTo(FloatPoint(innerRect.x(), innerRect.bottom()));
        path.addArc(FloatPoint(innerRect.x(), innerRect.y() + radius), radius, piFloat / 2, piFloat + piFloat / 2, false);
        path.closeSubpath();
    }

    for (int i = 0; i <= lastXTile; ++i) {
        for (int j = 0; j <= lastYTile; ++j) {
            const int dstX = i * surfaceSize.width();
            const int dstY = j * surfaceSize.height();
            const int dstRight = (i == lastXTile) ? m_size.width() : (i + 1) * surfaceSize.width();
            const int dstBottom = (j == lastYTile) ? m_size.height() : (j + 1) * surfaceSize.height();

            painter.translate(rect().x(), rect().y());

            if (dstX || dstY)
                painter.translate(-dstX, -dstY);

            // Paint the actual scrollbar.
            painter.setFillColor(Color(255, 255, 255));
            painter.drawRect(IntRect(IntPoint(0, 0), rect().size()), VG_FILL_PATH);
            painter.setFillColor(Color(173, 176, 178));
            painter.drawPath(path, VG_FILL_PATH, WebCore::RULE_NONZERO);

            surface->makeCurrent();
            unsigned char* dstBufferStart = m_image + (dstY * imageStride()) + (dstX * imageBytesPerPixel());
            vgReadPixels(dstBufferStart, imageStride(), VG_sRGB_565,
                0, 0, dstRight - dstX, dstBottom - dstY);
            ASSERT_VG_NO_ERROR();

            // Paint the alpha channel for the actual scrollbar.
            painter.setCompositeOperation(CompositeClear);
            painter.setFillColor(Color(0, 0, 0));
            painter.drawRect(IntRect(IntPoint(0, 0), rect().size()), VG_FILL_PATH);
            painter.setCompositeOperation(CompositeSourceOver);
            painter.setFillColor(Color(255, 255, 255));
            painter.drawPath(path, VG_FILL_PATH, WebCore::RULE_NONZERO);

            surface->makeCurrent();
            // FIXME: We need VG_A_4 until proper alpha blending is available.
            //   When we get 8-bit formats, make sure to adapt both the format
            //   and remove the division by two when determining the dstAlphaBufferStart.
            unsigned char* dstAlphaBufferStart = m_alphaImage + (dstY * alphaImageStride()) + dstX / 2;
            vgReadPixels(dstAlphaBufferStart, alphaImageStride(), VG_A_4,
                0, 0, dstRight - dstX, dstBottom - dstY);
            ASSERT_VG_NO_ERROR();

            if (dstX || dstY)
                painter.translate(dstX, dstY);
        }
    }
}

void WebViewPrivate::scrollBackingStore(WebCore::FrameView* view, int dx, int dy, const WebCore::IntRect& scrollViewRect, const WebCore::IntRect& clipRect)
{
    IntRect updateRect = clipRect;
    updateRect.intersect(scrollViewRect);
    
#if 0
    dy = -dy;
    dx = -dx;
    
    int svWidth = scrollViewRect.width();
    int svHeight = scrollViewRect.height();
    int dirtyX = 0, dirtyY = 0, dirtyW = 0, dirtyH = 0;

    if (dy == 0 && dx < 0 && -dx < svWidth) {
        dirtyW = -dx;
        dirtyH = svHeight;
    }
    else if (dy == 0 && dx > 0 && dx < svWidth) {
        dirtyX = svWidth - dx;
        dirtyW = dx;
        dirtyH = svHeight;
    }
    else if (dx == 0 && dy < 0 && -dy < svHeight) {
        dirtyW = svWidth;
        dirtyH = -dy;
    }
    else if (dx == 0 && dy > 0 && dy < svHeight) {
        dirtyY = svHeight - dy;
        dirtyW = svWidth;
        dirtyH = dy;
    }

    if (m_webView->viewWindow() && dirtyW) {
        m_srcRect.x = dx > 0 ? dx + scrollViewRect.x() : scrollViewRect.x();
        m_srcRect.y = dy > 0 ? dy + scrollViewRect.y() : scrollViewRect.y();
        m_srcRect.w = dx > 0 ? scrollViewRect.width() - dx : scrollViewRect.width() + dx;
        m_srcRect.h = dy > 0 ? scrollViewRect.height() - dy : scrollViewRect.height() + dy;

        m_dstRect.x = dx > 0 ? scrollViewRect.x() : -dx + scrollViewRect.x();
        m_dstRect.y = dy > 0 ? scrollViewRect.y() : -dy + scrollViewRect.y();
        m_dstRect.w = dx > 0 ? scrollViewRect.width() - dx : scrollViewRect.width() + dx;
        m_dstRect.h = dy > 0 ? scrollViewRect.height() -dy : scrollViewRect.height() + dy;

        int x, y, w, h = 0;
        if (dx > 0) {
            m_srcRect.x += m_scrollUpdateRect.width();
            m_srcRect.w -= m_scrollUpdateRect.width();
            x = scrollViewRect.x() + dirtyX - m_scrollUpdateRect.width();
            w = dirtyW + m_scrollUpdateRect.width();
        } else if (dx < 0) {
            m_dstRect.x += m_scrollUpdateRect.width();
            m_srcRect.w -= m_scrollUpdateRect.width();
            x = scrollViewRect.x() + dirtyX + m_scrollUpdateRect.width();
            w = dirtyW + m_scrollUpdateRect.width();
        } else {
            x = scrollViewRect.x() + dirtyX;
            w = dirtyW;
        }

        if (dy > 0) {
            m_srcRect.y += m_scrollUpdateRect.height();
            m_srcRect.h -= m_scrollUpdateRect.height();
            y = scrollViewRect.y() + dirtyY - m_scrollUpdateRect.height();
            h = dirtyH + m_scrollUpdateRect.height();
        } else if (dy < 0) {
            m_dstRect.y += m_scrollUpdateRect.height();
            m_srcRect.h -= m_scrollUpdateRect.height();
            y = scrollViewRect.y() + dirtyY + m_scrollUpdateRect.height();
            h = dirtyH + m_scrollUpdateRect.height();
        } else {
            y = scrollViewRect.y() + dirtyY;
            h = dirtyH;
        }

        Uint32 rmask, gmask, bmask, amask;
#if !PLATFORM(AMIGAOS4) && SDL_BYTEORDER == SDL_BIG_ENDIAN
        rmask = 0xff000000;
        gmask = 0x00ff0000;
        bmask = 0x0000ff00;
        amask = 0x000000ff;
#else
        rmask = 0x00ff0000;
        gmask = 0x0000ff00;
        bmask = 0x000000ff;
        amask = 0xff000000;
#endif

        if (m_scrollSurface)
            SDL_FreeSurface(m_scrollSurface);
        m_scrollSurface = SDL_CreateRGBSurface(SDL_SWSURFACE, m_dstRect.w, m_dstRect.h , 32, rmask, gmask, bmask, amask);

        SDL_Rect dRect = {0, 0, m_dstRect.w, m_dstRect.h};
        SDL_BlitSurface(m_webView->viewWindow(), &m_srcRect, m_scrollSurface, &dRect);

        m_scrollUpdateRect = IntRect(x, y, w, h);
        m_scrollUpdateRect.intersect(scrollViewRect);

        Scrollbar* hBar = view->horizontalScrollbar();
        Scrollbar* vBar = view->verticalScrollbar();
        if (dx && hBar)
//.........这里部分代码省略.........

void PageClientImpl::setViewNeedsDisplay(const WebCore::IntRect& rect)
{
    evas_object_image_data_update_add(m_viewObject, rect.x(), rect.y(), rect.width(), rect.height());
}