C++ (Cpp) ioSurfaceLockOptionsの例

コード例 #1

char* GraphicsSurface::platformLock(const IntRect& rect, int* outputStride, LockOptions lockOptions)
{
    m_lockOptions = lockOptions;
    IOReturn status = IOSurfaceLock(m_platformSurface, ioSurfaceLockOptions(m_lockOptions), 0);
    if (status == kIOReturnCannotLock) {
        m_lockOptions |= RetainPixels;
        IOSurfaceLock(m_platformSurface, ioSurfaceLockOptions(m_lockOptions), 0);
    }

    int stride = IOSurfaceGetBytesPerRow(m_platformSurface);
    if (outputStride)
        *outputStride = stride;

    char* base = static_cast<char*>(IOSurfaceGetBaseAddress(m_platformSurface));
    return base + stride * rect.y() + rect.x() * 4;
}

コード例 #2

char* GraphicsSurface::platformLock(const IntRect& rect, int* outputStride, LockOptions lockOptions)
{
    // Locking is only necessary for single buffered use.
    // In this case we only have a front buffer, so we only lock this one.
    m_lockOptions = lockOptions;
    IOReturn status = IOSurfaceLock(m_private->frontBuffer(), ioSurfaceLockOptions(m_lockOptions), 0);
    if (status == kIOReturnCannotLock) {
        m_lockOptions |= RetainPixels;
        IOSurfaceLock(m_private->frontBuffer(), ioSurfaceLockOptions(m_lockOptions), 0);
    }

    int stride = IOSurfaceGetBytesPerRow(m_private->frontBuffer());
    if (outputStride)
        *outputStride = stride;

    char* base = static_cast<char*>(IOSurfaceGetBaseAddress(m_private->frontBuffer()));

    return base + stride * rect.y() + rect.x() * 4;
}

コード例 #3

void GraphicsSurface::platformUnlock()
{
    IOSurfaceUnlock(m_private->frontBuffer(), ioSurfaceLockOptions(m_lockOptions), 0);
}

コード例 #4

void GraphicsSurface::platformUnlock()
{
    IOSurfaceUnlock(m_platformSurface, ioSurfaceLockOptions(m_lockOptions), 0);
}