C++ VkLayerDispatchTable::CreateImage方法代码示例

//.........这里部分代码省略.........
        VK_IMAGE_TYPE_2D,
        VK_FORMAT_R8G8B8A8_UNORM,
        {width, height, 1},
        1,
        1,
        VK_SAMPLE_COUNT_1_BIT,
        VK_IMAGE_TILING_LINEAR,
        VK_IMAGE_USAGE_TRANSFER_DST_BIT,
        VK_SHARING_MODE_EXCLUSIVE,
        0,
        NULL,
        VK_IMAGE_LAYOUT_UNDEFINED,
    };
    VkImageCreateInfo imgCreateInfo3 = imgCreateInfo2;

    // If we need both images, set up image2 to be read/write and tiled.
    if (need2steps) {
        imgCreateInfo2.tiling = VK_IMAGE_TILING_OPTIMAL;
        imgCreateInfo2.usage =
            VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;
    }

    VkMemoryAllocateInfo memAllocInfo = {
        VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO, NULL,
        0, // allocationSize, queried later
        0  // memoryTypeIndex, queried later
    };
    VkMemoryRequirements memRequirements;
    VkPhysicalDeviceMemoryProperties memoryProperties;

    // Create image2 and allocate its memory.  It could be the intermediate or
    // final image.
    err =
        pTableDevice->CreateImage(device, &imgCreateInfo2, NULL, &data.image2);
    assert(!err);
    if (VK_SUCCESS != err)
        return;
    pTableDevice->GetImageMemoryRequirements(device, data.image2,
                                             &memRequirements);
    memAllocInfo.allocationSize = memRequirements.size;
    pInstanceTable->GetPhysicalDeviceMemoryProperties(physicalDevice,
                                                      &memoryProperties);
    pass = memory_type_from_properties(
        &memoryProperties, memRequirements.memoryTypeBits,
        need2steps ? VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT
                   : VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT,
        &memAllocInfo.memoryTypeIndex);
    assert(pass);
    err = pTableDevice->AllocateMemory(device, &memAllocInfo, NULL, &data.mem2);
    assert(!err);
    if (VK_SUCCESS != err)
        return;
    err = pTableQueue->BindImageMemory(device, data.image2, data.mem2, 0);
    assert(!err);
    if (VK_SUCCESS != err)
        return;

    // Create image3 and allocate its memory, if needed.
    if (need2steps) {
        err = pTableDevice->CreateImage(device, &imgCreateInfo3, NULL,
                                        &data.image3);
        assert(!err);
        if (VK_SUCCESS != err)
            return;
        pTableDevice->GetImageMemoryRequirements(device, data.image3,
                                                 &memRequirements);

static void after_device_create(VkPhysicalDevice gpu, VkDevice device, layer_data *data) {
    VkResult U_ASSERT_ONLY err;

    data->gpu = gpu;
    data->dev = device;
    data->frame = 0;
    data->cmdBuffersThisFrame = 0;

    VkLayerDispatchTable *pTable = data->device_dispatch_table;

    /* Get our WSI hooks in. */
    data->pfnCreateSwapchainKHR = (PFN_vkCreateSwapchainKHR)pTable->GetDeviceProcAddr(device, "vkCreateSwapchainKHR");
    data->pfnGetSwapchainImagesKHR = (PFN_vkGetSwapchainImagesKHR)pTable->GetDeviceProcAddr(device, "vkGetSwapchainImagesKHR");
    data->pfnQueuePresentKHR = (PFN_vkQueuePresentKHR)pTable->GetDeviceProcAddr(device, "vkQueuePresentKHR");
    data->pfnDestroySwapchainKHR = (PFN_vkDestroySwapchainKHR)pTable->GetDeviceProcAddr(device, "vkDestroySwapchainKHR");
    data->swapChains = new std::unordered_map<VkSwapchainKHR, SwapChainData *>;

    /* Command pool */
    VkCommandPoolCreateInfo cpci;
    cpci.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
    cpci.pNext = nullptr;
    cpci.queueFamilyIndex = data->graphicsQueueFamilyIndex;
    cpci.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
    err = pTable->CreateCommandPool(device, &cpci, nullptr, &data->pool);
    assert(!err);

    /* Create the objects we need */

    /* Compile the shaders */
    compile_shader(device, VULKAN_SAMPLES_BASE_DIR "/Layer-Samples/data/overlay-vert.spv", &data->vsShaderModule);
    compile_shader(device, VULKAN_SAMPLES_BASE_DIR "/Layer-Samples/data/overlay-frag.spv", &data->fsShaderModule);

    /* Upload the font bitmap */
    VkImageCreateInfo ici;
    memset(&ici, 0, sizeof(ici));
    ici.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
    ici.imageType = VK_IMAGE_TYPE_2D;
    ici.format = VK_FORMAT_R8_UNORM;
    ici.extent.width = FONT_ATLAS_SIZE;
    ici.extent.height = FONT_ATLAS_SIZE;
    ici.extent.depth = 1;
    ici.mipLevels = 1;
    ici.arrayLayers = 1;
    ici.samples = VK_SAMPLE_COUNT_1_BIT;
    ici.tiling = VK_IMAGE_TILING_LINEAR;
    ici.usage = VK_IMAGE_USAGE_SAMPLED_BIT;
    ici.initialLayout = VK_IMAGE_LAYOUT_PREINITIALIZED;

    err = pTable->CreateImage(device, &ici, nullptr, &data->fontGlyphsImage);
    assert(!err);

    VkMemoryRequirements mem_reqs;
    pTable->GetImageMemoryRequirements(device, data->fontGlyphsImage, &mem_reqs);

    VkMemoryAllocateInfo mem_alloc;
    memset(&mem_alloc, 0, sizeof(mem_alloc));
    mem_alloc.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
    mem_alloc.allocationSize = mem_reqs.size;
    mem_alloc.memoryTypeIndex = choose_memory_type(gpu, mem_reqs.memoryTypeBits,
                                                   VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT);

    err = pTable->AllocateMemory(device, &mem_alloc, nullptr, &data->fontGlyphsMemory);
    assert(!err);
    err = pTable->BindImageMemory(device, data->fontGlyphsImage, data->fontGlyphsMemory, 0);
    assert(!err);

    VkImageSubresource subres;
    subres.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
    subres.mipLevel = 0;
    subres.arrayLayer = 0;
    VkSubresourceLayout layout;
    void *bits;

    pTable->GetImageSubresourceLayout(device, data->fontGlyphsImage, &subres, &layout);

    /* ensure we can directly upload into this layout */
    assert(!layout.offset);
    assert(layout.size >= FONT_ATLAS_SIZE * FONT_ATLAS_SIZE);
    assert(layout.rowPitch == FONT_ATLAS_SIZE);

    err = pTable->MapMemory(device, data->fontGlyphsMemory, 0, VK_WHOLE_SIZE, 0, &bits);
    assert(!err);

    /* Load the font glyphs directly into the mapped buffer */
    std::vector<unsigned char> fontData;
    get_file_contents(VULKAN_SAMPLES_BASE_DIR "/Layer-Samples/data/FreeSans.ttf", fontData);
    stbtt_BakeFontBitmap(&fontData[0], 0, FONT_SIZE_PIXELS, (unsigned char *)bits, FONT_ATLAS_SIZE, FONT_ATLAS_SIZE, 32, 96,
                         data->glyphs);

    pTable->UnmapMemory(device, data->fontGlyphsMemory);

    VkImageViewCreateInfo ivci;
    ivci.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
    ivci.viewType = VK_IMAGE_VIEW_TYPE_2D;
    ivci.pNext = nullptr;
    ivci.format = ici.format;
    ivci.components.r = VK_COMPONENT_SWIZZLE_R;
    ivci.components.g = VK_COMPONENT_SWIZZLE_G;
    ivci.components.b = VK_COMPONENT_SWIZZLE_B;
    ivci.components.a = VK_COMPONENT_SWIZZLE_A;
//.........这里部分代码省略.........