示例#1
0
void GLWebViewState::setVisibleContentRect(const SkRect& visibleContentRect, float scale)
{
    // allocate max possible number of tiles visible with this visibleContentRect / expandedTileBounds
    const float invTileContentWidth = scale / TilesManager::tileWidth();
    const float invTileContentHeight = scale / TilesManager::tileHeight();

    int viewMaxTileX =
        static_cast<int>(ceilf((visibleContentRect.width()-1) * invTileContentWidth)) + 1;
    int viewMaxTileY =
        static_cast<int>(ceilf((visibleContentRect.height()-1) * invTileContentHeight)) + 1;

    TilesManager* tilesManager = TilesManager::instance();
    int maxTextureCount = viewMaxTileX * viewMaxTileY * (tilesManager->highEndGfx() ? 4 : 2);

    tilesManager->setCurrentTextureCount(maxTextureCount);

    // TODO: investigate whether we can move this return earlier.
    if ((m_visibleContentRect == visibleContentRect)
        && (m_scale == scale)) {
        // everything below will stay the same, early return.
        m_isVisibleContentRectScrolling = false;
        return;
    }
    m_scale = scale;

    m_goingDown = m_visibleContentRect.fTop - visibleContentRect.fTop <= 0;
    m_goingLeft = m_visibleContentRect.fLeft - visibleContentRect.fLeft >= 0;

    // detect visibleContentRect scrolling from short programmatic scrolls/jumps
    m_isVisibleContentRectScrolling = m_visibleContentRect != visibleContentRect
        && SkRect::Intersects(m_visibleContentRect, visibleContentRect);
    m_visibleContentRect = visibleContentRect;

    ALOGV("New visibleContentRect %.2f - %.2f %.2f - %.2f (w: %2.f h: %.2f scale: %.2f )",
          m_visibleContentRect.fLeft, m_visibleContentRect.fTop,
          m_visibleContentRect.fRight, m_visibleContentRect.fBottom,
          m_visibleContentRect.width(), m_visibleContentRect.height(), scale);
}
示例#2
0
void TileGrid::prepareGL(GLWebViewState* state, float scale,
                         const IntRect& prepareArea, const IntRect& fullContentArea,
                         TilePainter* painter, int regionFlags, bool isLowResPrefetch,
                         bool updateWithBlit)
{
    // first, how many tiles do we need
    m_area = computeTilesArea(prepareArea, scale);
    if (m_area.isEmpty())
        return;

    ALOGV("prepare TileGrid %p with scale %.2f, prepareArea "
          " %d, %d - %d x %d, corresponding to %d, %d x - %d x %d tiles",
          this, scale,
          prepareArea.x(), prepareArea.y(),
          prepareArea.width(), prepareArea.height(),
          m_area.x(), m_area.y(),
          m_area.width(), m_area.height());

    bool goingDown = m_prevTileY < m_area.y();
    m_prevTileY = m_area.y();

    TilesManager* tilesManager = TilesManager::instance();
    if (scale != m_scale)
        tilesManager->removeOperationsForFilter(new ScaleFilter(painter, m_scale));

    m_scale = scale;

    // apply dirty region to affected tiles
    if (!m_dirtyRegion.isEmpty()) {
        for (unsigned int i = 0; i < m_tiles.size(); i++)
            m_tiles[i]->markAsDirty(m_dirtyRegion);

        // log inval region for the base surface
        if (m_isBaseSurface && tilesManager->getProfiler()->enabled()) {
            SkRegion::Iterator iterator(m_dirtyRegion);
            while (!iterator.done()) {
                SkIRect r = iterator.rect();
                tilesManager->getProfiler()->nextInval(r, scale);
                iterator.next();
            }
        }
        m_dirtyRegion.setEmpty();
    }

    if (regionFlags & StandardRegion) {
        for (int i = 0; i < m_area.width(); i++) {
            if (goingDown) {
                for (int j = 0; j < m_area.height(); j++)
                    prepareTile(m_area.x() + i, m_area.y() + j,
                                painter, state, isLowResPrefetch, false, updateWithBlit);
            } else {
                for (int j = m_area.height() - 1; j >= 0; j--)
                    prepareTile(m_area.x() + i, m_area.y() + j,
                                painter, state, isLowResPrefetch, false, updateWithBlit);
            }
        }
    }

    if (regionFlags & ExpandedRegion) {
        IntRect fullArea = computeTilesArea(fullContentArea, scale);
        IntRect expandedArea = m_area;

        // on systems reporting highEndGfx=true and useMinimalMemory not set, use expanded bounds
        if (tilesManager->highEndGfx() && !tilesManager->useMinimalMemory())
            expandedArea.inflate(EXPANDED_BOUNDS_INFLATE);

        if (isLowResPrefetch)
            expandedArea.inflateY(EXPANDED_PREFETCH_BOUNDS_Y_INFLATE);

        // clip painting area to content
        expandedArea.intersect(fullArea);

        for (int i = expandedArea.x(); i < expandedArea.maxX(); i++)
            for (int j = expandedArea.y(); j < expandedArea.maxY(); j++)
                if (!m_area.contains(i, j))
                    prepareTile(i, j, painter, state, isLowResPrefetch, true, updateWithBlit);
    }
}