Merge "swapchain: add condition to report mailbox mode"

VKAPI_ATTR

VkResult GetPhysicalDeviceSurfacePresentModesKHR(VkPhysicalDevice pdev,

                                                 VkSurfaceKHR /*surface*/,

                                                 VkSurfaceKHR surface,

                                                 uint32_t* count,

                                                 VkPresentModeKHR* modes) {

    int err;

    int query_value;

    ANativeWindow* window = SurfaceFromHandle(surface)->window.get();

    err = window->query(window, NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, &query_value);

    if (err != 0 || query_value < 0) {

        ALOGE("NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS query failed: %s (%d) value=%d",

              strerror(-err), err, query_value);

        return VK_ERROR_SURFACE_LOST_KHR;

    }

    uint32_t min_undequeued_buffers = static_cast<uint32_t>(query_value);

    err = window->query(window, NATIVE_WINDOW_MAX_BUFFER_COUNT, &query_value);

    if (err != 0 || query_value < 0) {

        ALOGE("NATIVE_WINDOW_MAX_BUFFER_COUNT query failed: %s (%d) value=%d",

              strerror(-err), err, query_value);

        return VK_ERROR_SURFACE_LOST_KHR;

    }

    uint32_t max_buffer_count = static_cast<uint32_t>(query_value);

    android::Vector<VkPresentModeKHR> present_modes;

    if (min_undequeued_buffers + 1 < max_buffer_count)

        present_modes.push_back(VK_PRESENT_MODE_MAILBOX_KHR);

    present_modes.push_back(VK_PRESENT_MODE_FIFO_KHR);