Method getBackbufferSurface

src/VulkanContext/VulkanWindowContext.cpp:515–566

}

sk_sp<SkSurface> VulkanWindowContext::getBackbufferSurface() {
    BackbufferInfo* backbuffer = this->getAvailableBackbuffer();
    SkASSERT(backbuffer);

    // semaphores should be in unsignaled state
    VkSemaphoreCreateInfo semaphoreInfo;
    memset(&semaphoreInfo, 0, sizeof(VkSemaphoreCreateInfo));
    semaphoreInfo.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
    semaphoreInfo.pNext = nullptr;
    semaphoreInfo.flags = 0;
    VkSemaphore semaphore;
    SkDEBUGCODE(VkResult result = )GR_VK_CALL(fInterface, CreateSemaphore(fDevice, &semaphoreInfo,
                                                                          nullptr, &semaphore));
    SkASSERT(result == VK_SUCCESS);

    // acquire the image
    VkResult res = fAcquireNextImageKHR(fDevice, fSwapchain, UINT64_MAX,
                                        semaphore, VK_NULL_HANDLE,
                                        &backbuffer->fImageIndex);
    if (VK_ERROR_SURFACE_LOST_KHR == res) {
        // need to figure out how to create a new vkSurface without the platformData*
        // maybe use attach somehow? but need a Window
        GR_VK_CALL(fInterface, DestroySemaphore(fDevice, semaphore, nullptr));
        return nullptr;
    }
    if (VK_ERROR_OUT_OF_DATE_KHR == res) {
        // tear swapchain down and try again
        if (!this->createSwapchain(-1, -1)) {
            GR_VK_CALL(fInterface, DestroySemaphore(fDevice, semaphore, nullptr));
            return nullptr;
        }
        backbuffer = this->getAvailableBackbuffer();

        // acquire the image
        res = fAcquireNextImageKHR(fDevice, fSwapchain, UINT64_MAX,
                                   semaphore, VK_NULL_HANDLE,
                                   &backbuffer->fImageIndex);

        if (VK_SUCCESS != res) {
            GR_VK_CALL(fInterface, DestroySemaphore(fDevice, semaphore, nullptr));
            return nullptr;
        }
    }

    SkSurface* surface = fSurfaces[backbuffer->fImageIndex].get();

    GrBackendSemaphore beSemaphore = GrBackendSemaphores::MakeVk(semaphore);

    surface->wait(1, &beSemaphore);

    return sk_ref_sp(surface);
}

void VulkanWindowContext::onSwapBuffers() {