ULRE/src/SceneGraph/Vulkan/VKDescriptorSetLayoutCreater.h

#pragma once

#include<hgl/graph/VK.h>
#include<hgl/graph/shader/ShaderResource.h>
#include<hgl/type/Map.h>
VK_NAMESPACE_BEGIN
class DescriptorSets;

enum class DescriptorSetType
{
    Material=0,
    Renderable,
    Global,
};//

/**
* 描述符合集创造器
*/
class DescriptorSetLayoutCreater
{
    VkDevice device;
    VkDescriptorPool pool;

    List<VkDescriptorSetLayoutBinding> layout_binding_list;
    VkDescriptorSetLayout dsl=VK_NULL_HANDLE;
    BindingMapping index_by_binding;
    BindingMapping index_by_binding_ri;
    BindingMapping index_by_binding_global;

    VkPipelineLayout pipeline_layout=VK_NULL_HANDLE;

public:

    DescriptorSetLayoutCreater(VkDevice dev,VkDescriptorPool dp){device=dev;pool=dp;}
    ~DescriptorSetLayoutCreater();

    void Bind(const ShaderDescriptorList *sd_list,VkDescriptorType type,VkShaderStageFlagBits stage);

    void Bind(const ShaderDescriptorList *sdl,VkShaderStageFlagBits stage)
    {
        for(uint32_t i=VK_DESCRIPTOR_TYPE_BEGIN_RANGE;i<=VK_DESCRIPTOR_TYPE_END_RANGE;i++)
        {
            if(sdl->GetCount()>0)
                Bind(sdl,(VkDescriptorType)i,stage);

            ++sdl;
        }
    }

//以下代码不再需要，使用一个void Bind(const ShaderResource &sr,VkShaderStageFlagBits stage)即可全部替代，而且更方便，但以此为提示
//
//#define DESC_SET_BIND_FUNC(name,vkname) void Bind##name(const uint32_t binding,VkShaderStageFlagBits stage_flag){Bind(binding,VK_DESCRIPTOR_TYPE_##vkname,stage_flag);} \
//                                        void Bind##name(const uint32_t *binding,const uint32_t count,VkShaderStageFlagBits stage_flag){Bind(binding,count,VK_DESCRIPTOR_TYPE_##vkname,stage_flag);}
//
//    DESC_SET_BIND_FUNC(Sampler,                 SAMPLER);
//
//    DESC_SET_BIND_FUNC(CombinedImageSampler,    COMBINED_IMAGE_SAMPLER);
//    DESC_SET_BIND_FUNC(SampledImage,            SAMPLED_IMAGE);
//    DESC_SET_BIND_FUNC(StorageImage,            STORAGE_IMAGE);
//
//    DESC_SET_BIND_FUNC(UTBO,                    UNIFORM_TEXEL_BUFFER);
//    DESC_SET_BIND_FUNC(SSTBO,                   STORAGE_TEXEL_BUFFER);
//    DESC_SET_BIND_FUNC(UBO,                     UNIFORM_BUFFER);
//    DESC_SET_BIND_FUNC(SSBO,                    STORAGE_BUFFER);
//    DESC_SET_BIND_FUNC(UBODynamic,              UNIFORM_BUFFER_DYNAMIC);
//    DESC_SET_BIND_FUNC(SSBODynamic,             STORAGE_BUFFER_DYNAMIC);
//
//    DESC_SET_BIND_FUNC(InputAttachment,         INPUT_ATTACHMENT);
//
//#undef DESC_SET_BIND_FUNC

    bool CreatePipelineLayout();

    const VkPipelineLayout GetPipelineLayout()const{return pipeline_layout;}

    DescriptorSets *Create(const DescriptorSetType &type=DescriptorSetType::Material);
};//class DescriptorSetLayoutCreater
VK_NAMESPACE_END