ULRE/src/RenderDevice/Vulkan/VKDescriptorSetLayoutCreater.h

#pragma once

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

/**
* 描述符合集创造器
*/
class DescriptorSetLayoutCreater
{
    Device *device;

    List<VkDescriptorSetLayoutBinding> layout_binding_list;
    VkDescriptorSetLayout dsl=VK_NULL_HANDLE;
    Map<uint32_t,int> index_by_binding;

    VkPipelineLayout pipeline_layout=VK_NULL_HANDLE;

public:

    DescriptorSetLayoutCreater(Device *dev):device(dev){}
    ~DescriptorSetLayoutCreater();

    void Bind(const uint32_t binding,VkDescriptorType,VkShaderStageFlagBits);
    void Bind(const uint32_t *binding,const uint32_t count,VkDescriptorType type,VkShaderStageFlagBits stage);
    void Bind(const ShaderBindingList &sbl,VkDescriptorType type,VkShaderStageFlagBits stage)
    {
        if(sbl.GetCount()>0)
            Bind(sbl.GetData(),sbl.GetCount(),type,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->binding_list.GetCount()>0)
                Bind(sdl->binding_list.GetData(),sdl->binding_list.GetCount(),(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();
};//class DescriptorSetLayoutCreater
VK_NAMESPACE_END