Пример #1
0
void RenderLayerClipper::getOrCalculateClipRects(const ClipRectsContext& context, ClipRects& clipRects) const
{
    if (context.usesCache())
        clipRects = *getClipRects(context);
    else
        calculateClipRects(context, clipRects);
}
Пример #2
0
void RenderLayerClipper::updateClipRects(const ClipRectsContext& clipRectsContext)
{
    ClipRectsType clipRectsType = clipRectsContext.clipRectsType;
    ASSERT(clipRectsType < NumCachedClipRectsTypes);
    if (m_clipRectsCache
        && clipRectsContext.rootLayer == m_clipRectsCache->clipRectsRoot(clipRectsType)
        && m_clipRectsCache->getClipRects(clipRectsType, clipRectsContext.respectOverflowClip)) {
        // FIXME: We used to ASSERT that we always got a consistent root layer.
        // We should add a test that has an inconsistent root. See
        // http://crbug.com/366118 for an example.
        ASSERT(m_clipRectsCache->m_scrollbarRelevancy[clipRectsType] == clipRectsContext.overlayScrollbarSizeRelevancy);

#ifdef CHECK_CACHED_CLIP_RECTS
        // This code is useful to check cached clip rects, but is too expensive to leave enabled in debug builds by default.
        ClipRectsContext tempContext(clipRectsContext);
        tempContext.clipRectsType = TemporaryClipRects;
        ClipRects clipRects;
        calculateClipRects(tempContext, clipRects);
        ASSERT(clipRects == *m_clipRectsCache->getClipRects(clipRectsType, clipRectsContext.respectOverflowClip).get());
#endif
        return; // We have the correct cached value.
    }

    // For transformed layers, the root layer was shifted to be us, so there is no need to
    // examine the parent. We want to cache clip rects with us as the root.
    RenderLayer* parentLayer = !isClippingRootForContext(clipRectsContext) ? m_renderer.layer()->parent() : 0;
    if (parentLayer)
        parentLayer->clipper().updateClipRects(clipRectsContext);

    ClipRects clipRects;
    calculateClipRects(clipRectsContext, clipRects);

    if (!m_clipRectsCache)
        m_clipRectsCache = adoptPtr(new ClipRectsCache);

    if (parentLayer && parentLayer->clipper().clipRects(clipRectsContext) && clipRects == *parentLayer->clipper().clipRects(clipRectsContext))
        m_clipRectsCache->setClipRects(clipRectsType, clipRectsContext.respectOverflowClip, parentLayer->clipper().clipRects(clipRectsContext), clipRectsContext.rootLayer);
    else
        m_clipRectsCache->setClipRects(clipRectsType, clipRectsContext.respectOverflowClip, ClipRects::create(clipRects), clipRectsContext.rootLayer);

#ifndef NDEBUG
    m_clipRectsCache->m_scrollbarRelevancy[clipRectsType] = clipRectsContext.overlayScrollbarSizeRelevancy;
#endif
}
Пример #3
0
void RenderLayerClipper::updateClipRects(const ClipRectsContext& clipRectsContext)
{
    ClipRectsType clipRectsType = clipRectsContext.clipRectsType;
    ASSERT(clipRectsType < NumCachedClipRectsTypes);
    if (m_clipRectsCache && m_clipRectsCache->getClipRects(clipRectsType, clipRectsContext.respectOverflowClip)) {
        // FIXME: these asserts trigger for squashing. Need to update this code to support squashing as appropriate.
        ASSERT(clipRectsContext.rootLayer == m_clipRectsCache->m_clipRectsRoot[clipRectsType]);
        ASSERT(m_clipRectsCache->m_scrollbarRelevancy[clipRectsType] == clipRectsContext.overlayScrollbarSizeRelevancy);

#ifdef CHECK_CACHED_CLIP_RECTS
        // This code is useful to check cached clip rects, but is too expensive to leave enabled in debug builds by default.
        ClipRectsContext tempContext(clipRectsContext);
        tempContext.clipRectsType = TemporaryClipRects;
        ClipRects clipRects;
        calculateClipRects(tempContext, clipRects);
        ASSERT(clipRects == *m_clipRectsCache->getClipRects(clipRectsType, clipRectsContext.respectOverflowClip).get());
#endif
        return; // We have the correct cached value.
    }

    // For transformed layers, the root layer was shifted to be us, so there is no need to
    // examine the parent. We want to cache clip rects with us as the root.
    RenderLayer* parentLayer = clipRectsContext.rootLayer != m_renderer->layer() ? m_renderer->layer()->parent() : 0;
    if (parentLayer)
        parentLayer->clipper().updateClipRects(clipRectsContext);

    ClipRects clipRects;
    calculateClipRects(clipRectsContext, clipRects);

    if (!m_clipRectsCache)
        m_clipRectsCache = adoptPtr(new ClipRectsCache);

    if (parentLayer && parentLayer->clipper().clipRects(clipRectsContext) && clipRects == *parentLayer->clipper().clipRects(clipRectsContext))
        m_clipRectsCache->setClipRects(clipRectsType, clipRectsContext.respectOverflowClip, parentLayer->clipper().clipRects(clipRectsContext));
    else
        m_clipRectsCache->setClipRects(clipRectsType, clipRectsContext.respectOverflowClip, ClipRects::create(clipRects));

#ifndef NDEBUG
    m_clipRectsCache->m_clipRectsRoot[clipRectsType] = clipRectsContext.rootLayer;
    m_clipRectsCache->m_scrollbarRelevancy[clipRectsType] = clipRectsContext.overlayScrollbarSizeRelevancy;
#endif
}
Пример #4
0
ClipRects* PaintLayerClipper::getClipRects(const ClipRectsContext& context) const
{
    if (ClipRects* result = clipRectsIfCached(context))
        return result;
    // Note that it's important that we call getClipRects on our parent
    // before we call calculateClipRects so that calculateClipRects will hit
    // the cache.
    ClipRects* parentClipRects = 0;
    if (context.rootLayer != m_layoutObject.layer() && m_layoutObject.layer()->parent())
        parentClipRects = m_layoutObject.layer()->parent()->clipper().getClipRects(context);
    RefPtr<ClipRects> clipRects = ClipRects::create();
    calculateClipRects(context, *clipRects);
    return storeClipRectsInCache(context, parentClipRects, *clipRects);
}
Пример #5
0
ClipRects* RenderLayerClipper::getClipRects(const ClipRectsContext& context) const
{
    if (ClipRects* result = clipRectsIfCached(context))
        return result;

    // Note that it's important that we call getClipRects on our parent
    // before we call calculateClipRects so that calculateClipRects will hit
    // the cache.
    ClipRects* parentClipRects = 0;
    if (context.rootLayer != m_renderer.layer() && m_renderer.layer()->parent())
        parentClipRects = m_renderer.layer()->parent()->clipper().getClipRects(context);

    ClipRects clipRects;
    calculateClipRects(context, clipRects);
    return storeClipRectsInCache(context, parentClipRects, clipRects);
}
Пример #6
0
ClipRects* PaintLayerClipper::clipRectsIfCached(const ClipRectsContext& context) const
{
    ASSERT(context.usesCache());
    if (!m_cache)
        return 0;
    ClipRectsCache::Entry& entry = m_cache->get(context.cacheSlot());
    // FIXME: We used to ASSERT that we always got a consistent root layer.
    // We should add a test that has an inconsistent root. See
    // http://crbug.com/366118 for an example.
    if (context.rootLayer != entry.root)
        return 0;
    ASSERT(entry.scrollbarRelevancy == context.scrollbarRelevancy);
#ifdef CHECK_CACHED_CLIP_RECTS
    // This code is useful to check cached clip rects, but is too expensive to leave enabled in debug builds by default.
    ClipRectsContext tempContext(context);
    tempContext.cacheSlot = UncachedClipRects;
    RefPtr<ClipRects> clipRects = ClipRects::create();
    calculateClipRects(tempContext, *clipRects);
    ASSERT(clipRects == *entry.clipRects);
#endif
    return entry.clipRects.get();
}