C++ (Cpp) discardImageBuffer Examples

Example #1

void HTMLCanvasElement::ensureUnacceleratedImageBuffer()
{
    if ((hasImageBuffer() && !m_imageBuffer->isAccelerated()) || m_didFailToCreateImageBuffer)
        return;
    discardImageBuffer();
    OpacityMode opacityMode = !m_context || m_context->hasAlpha() ? NonOpaque : Opaque;
    m_imageBuffer = ImageBuffer::create(size(), opacityMode);
    m_didFailToCreateImageBuffer = !m_imageBuffer;
}

Example #2

void HTMLCanvasElement::setSurfaceSize(const IntSize& size)
{
    m_size = size;
    m_didFailToCreateImageBuffer = false;
    discardImageBuffer();
    clearCopiedImage();
    if (m_context && m_context->is2d()) {
        CanvasRenderingContext2D* context2d = toCanvasRenderingContext2D(m_context.get());
        if (context2d->isContextLost()) {
            context2d->restoreContext();
        }
    }
}

Example #3

File: HTMLCanvasElement.cpp Project: 335969568/Blink-1

void HTMLCanvasElement::didChangeVisibilityState(PageVisibilityState visibility)
{
    if (!m_context)
        return;
    bool hidden = visibility != PageVisibilityStateVisible;
    m_context->setIsHidden(hidden);
    if (hidden) {
        clearCopiedImage();
        if (is3D()) {
            discardImageBuffer();
        }
    }
}