Function demo_prepare_texture_buffer

cube/cube.c:1733–1792

}

static void demo_prepare_texture_buffer(struct demo *demo, const char *filename, struct texture_object *tex_obj) {
    int32_t tex_width;
    int32_t tex_height;
    VkResult U_ASSERT_ONLY err;
    bool U_ASSERT_ONLY pass;

    if (!loadTexture(filename, NULL, NULL, &tex_width, &tex_height)) {
        ERR_EXIT("Failed to load textures", "Load Texture Failure");
    }

    tex_obj->tex_width = tex_width;
    tex_obj->tex_height = tex_height;

    const VkBufferCreateInfo buffer_create_info = {.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
                                                   .pNext = NULL,
                                                   .flags = 0,
                                                   .size = tex_width * tex_height * 4,
                                                   .usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
                                                   .sharingMode = VK_SHARING_MODE_EXCLUSIVE,
                                                   .queueFamilyIndexCount = 0,
                                                   .pQueueFamilyIndices = NULL};

    err = vkCreateBuffer(demo->device, &buffer_create_info, NULL, &tex_obj->buffer);
    assert(!err);
    demo_name_object(demo, VK_OBJECT_TYPE_BUFFER, (uint64_t)tex_obj->buffer, "TexBuffer(%s)", filename);

    VkMemoryRequirements mem_reqs;
    vkGetBufferMemoryRequirements(demo->device, tex_obj->buffer, &mem_reqs);

    tex_obj->mem_alloc.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
    tex_obj->mem_alloc.pNext = NULL;
    tex_obj->mem_alloc.allocationSize = mem_reqs.size;
    tex_obj->mem_alloc.memoryTypeIndex = 0;

    VkFlags requirements = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
    pass = memory_type_from_properties(demo, mem_reqs.memoryTypeBits, requirements, &tex_obj->mem_alloc.memoryTypeIndex);
    assert(pass);

    err = vkAllocateMemory(demo->device, &tex_obj->mem_alloc, NULL, &(tex_obj->mem));
    assert(!err);
    demo_name_object(demo, VK_OBJECT_TYPE_DEVICE_MEMORY, (uint64_t)tex_obj->mem, "TexBufMemory(%s)", filename);

    /* bind memory */
    err = vkBindBufferMemory(demo->device, tex_obj->buffer, tex_obj->mem, 0);
    assert(!err);

    VkSubresourceLayout layout;
    memset(&layout, 0, sizeof(layout));
    layout.rowPitch = tex_width * 4;

    void *data;
    err = vkMapMemory(demo->device, tex_obj->mem, 0, tex_obj->mem_alloc.allocationSize, 0, &data);
    assert(!err);

    if (!loadTexture(filename, data, &layout, &tex_width, &tex_height)) {
        fprintf(stderr, "Error loading texture: %s\n", filename);
    }