Untitled

// Bad
static int CreateUniformDescription(VkDescriptorPool* pDescPool, VkDescriptorSetLayout* pDescLayout, VkDescriptorSet* pDescSet,
    VkDeviceMemory* pDevMemory, VkBuffer* pUniBuffer)
{
    // Setup Layout Binding for the Uniform buffer that contains "camera"
    VkDescriptorSetLayoutBinding layoutBinding = {};
    layoutBinding.binding = 0;
    layoutBinding.descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
    layoutBinding.descriptorCount = 1;
    layoutBinding.stageFlags = VK_SHADER_STAGE_VERTEX_BIT;

    // Setup the Description Layout Info
    VkDescriptorSetLayoutCreateInfo descLayoutInfo = {};
    descLayoutInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
    descLayoutInfo.pBindings = &layoutBinding;
    descLayoutInfo.bindingCount = 1;

    // Create Description Layout
    VkDescriptorSetLayout descLayout = {};
    VkResult res = vkCreateDescriptorSetLayout(_VkSystem.device, &descLayoutInfo, 0, &descLayout);
    if (res != VK_SUCCESS)
        return 1;

    // Setup Descriptor Pool Size
    VkDescriptorPoolSize descPoolSize = {};
    descPoolSize.descriptorCount = 1;
    descPoolSize.type = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;

    // Setup Descriptor Pool Info
    VkDescriptorPoolCreateInfo descPoolInfo = {};
    descPoolInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
    descPoolInfo.maxSets = 1;
    descPoolInfo.poolSizeCount = 1;
    descPoolInfo.pPoolSizes = &descPoolSize;

    // Create Descriptor Pool
    VkDescriptorPool descPool = {};
    res = vkCreateDescriptorPool(_VkSystem.device, &descPoolInfo, 0, &descPool);
    if (res != VK_SUCCESS)
        return 1;

    // Setup Descriptor Allocate Info
    VkDescriptorSetAllocateInfo allocInfo = {};
    allocInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
    allocInfo.descriptorPool = descPool;
    allocInfo.pSetLayouts = &descLayout;
    allocInfo.descriptorSetCount = 1;

    // Allocate Descriptor set/s
    VkDescriptorSet descSet = {};
    res = vkAllocateDescriptorSets(_VkSystem.device, &allocInfo, &descSet);
    if (res != VK_SUCCESS)
        return 1;

    // Create some random big buffer for the Uniform block
    int uniBlockSize = sizeof(float) * 2; // vec2
    VkDeviceMemory devMemory2;
    VkBuffer uniBuffer;
    CreateBuffer(uniBlockSize, VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, &uniBuffer, &devMemory2);

    VkMappedMemoryRange range;

    void* pBuffer;
    vkMapMemory(_VkSystem.device, devMemory2, 0, uniBlockSize, 0, &pBuffer);

    ((float*)pBuffer)[0] = 0.1f; // x
    ((float*)pBuffer)[1] = 0.5f; // y

    vkUnmapMemory(_VkSystem.device, devMemory2);

    // Setup Descriptor Buffer Info
    VkDescriptorBufferInfo bufferInfo = {};
    bufferInfo.buffer = uniBuffer;
    bufferInfo.range = uniBlockSize;

    // Setup Write Descriptor Set
    VkWriteDescriptorSet writeDescSet = {};
    writeDescSet.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
    writeDescSet.descriptorCount = 1;
    writeDescSet.descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
    writeDescSet.dstSet = descSet;
    writeDescSet.pBufferInfo = &bufferInfo;

    // Update Descriptor set/s
    vkUpdateDescriptorSets(_VkSystem.device, 1, &writeDescSet, 0, 0);

    *pDescLayout = descLayout;
    *pDescSet = descSet;
    *pDevMemory = devMemory2;
    *pUniBuffer = uniBuffer;
    *pDescPool = descPool;

    return res;
}