ht_renderpass_base.h

#pragma once

#include <ht_platform.h>            //HT_API
#include <ht_math.h>                //Math::Matrix4
#include <ht_renderpass_resource.h> //Resource::RenderPass
#include <ht_shadervariablechunk.h> //ShaderVariableChunk

#include <ht_material.h>            //MaterialHandle
#include <ht_mesh.h>                //MeshHandle
#include <ht_rendertarget.h>        //RenderTargetHandle
#include <ht_commandpool.h>         //ICommandPool

namespace Hatchit
{
    namespace Graphics
    {
        struct RenderRequest
        {
            PipelineHandle          pipeline;
            MaterialHandle          material;
            MeshHandle              mesh;
            ShaderVariableChunk*    instanceData;
        };

        struct Renderable
        {
            MaterialHandle  material;
            MeshHandle      mesh;
        };

        struct RenderableInstances
        {
            Renderable  renderable;
            uint32_t    count;
        };

        class HT_API RenderPassBase
        {
        public:
            virtual ~RenderPassBase() { };

            virtual void VUpdate() = 0;

            void SetView(Math::Matrix4 view);
            void SetProj(Math::Matrix4 proj);

            virtual bool VBuildCommandList(const ICommandPool* commandPool) = 0;

            virtual void ScheduleRenderRequest(MaterialHandle material, MeshHandle mesh, ShaderVariableChunk* instanceVariables);

            virtual uint64_t GetLayerFlags();

        protected:
            void BuildRenderRequestHeirarchy();

            //Input
            std::vector<RenderRequest> m_renderRequests;

            std::map<PipelineHandle, std::vector<RenderableInstances>> m_pipelineList;
            std::map<MeshHandle, std::vector<ShaderVariableChunk*>> m_instanceData;

            //Output
            std::vector<RenderTargetHandle> m_outputRenderTargets;

            //Internals
            uint64_t m_layerflags = 1;

            uint32_t m_width;
            uint32_t m_height;

            Math::Matrix4 m_view;
            Math::Matrix4 m_proj;
        };
    }
}