コード例 #1
0
void Renderer::onContentSizeDirty() {
    _isPageSplitted = false;
    if (hasFlag(RenderFlag::PaginatedLayout)) {
        Size s = _owner->getContentSize();
        if (shouldSplitPages(s)) {
            s.width /= 2.0f;
            _isPageSplitted = true;
        }
        s.width -= _pageMargin.horizontal();
        s.height -= _pageMargin.vertical();
        setSurfaceSize(s);
    } else {
        setSurfaceSize(_owner->getContentSize());
    }
}
コード例 #2
0
void HTMLCanvasElement::reset()
{
    if (m_ignoreReset)
        return;

    resetDirtyRect();

    bool ok;
    bool hadImageBuffer = hasImageBuffer();

    int w = getAttribute(widthAttr).toInt(&ok);
    if (!ok || w < 0)
        w = DefaultWidth;

    int h = getAttribute(heightAttr).toInt(&ok);
    if (!ok || h < 0)
        h = DefaultHeight;

    if (m_contextStateSaver) {
        // Reset to the initial graphics context state.
        m_contextStateSaver->restore();
        m_contextStateSaver->save();
    }

    if (m_context && m_context->is2d())
        toCanvasRenderingContext2D(m_context.get())->reset();

    IntSize oldSize = size();
    IntSize newSize(w, h);

    // If the size of an existing buffer matches, we can just clear it instead of reallocating.
    // This optimization is only done for 2D canvases for now.
    if (hadImageBuffer && oldSize == newSize && m_context && m_context->is2d()) {
        if (!m_didClearImageBuffer)
            clearImageBuffer();
        return;
    }

    setSurfaceSize(newSize);

    if (m_context && m_context->is3d() && oldSize != size())
        toWebGLRenderingContext(m_context.get())->reshape(width(), height());

    if (RenderObject* renderer = this->renderer()) {
        if (renderer->isCanvas()) {
            if (oldSize != size()) {
                toRenderHTMLCanvas(renderer)->canvasSizeChanged();
                if (renderBox() && renderBox()->hasAcceleratedCompositing())
                    renderBox()->contentChanged(CanvasChanged);
            }
            if (hadImageBuffer)
                renderer->setShouldDoFullPaintInvalidation(true);
        }
    }

    WillBeHeapHashSet<RawPtrWillBeWeakMember<CanvasObserver> >::iterator end = m_observers.end();
    for (WillBeHeapHashSet<RawPtrWillBeWeakMember<CanvasObserver> >::iterator it = m_observers.begin(); it != end; ++it)
        (*it)->canvasResized(this);
}