hlms.h

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#pragma once
 
#include <OGRE/Hlms/Unlit/OgreHlmsUnlit.h>
#include <OGRE/Hlms/Pbs/OgreHlmsPbs.h>
#include <OGRE/OgreHlmsListener.h>
 
#define SHADER_ADDONS_PARAM_ID 8000000u
 
class SharedHelperForHlms
{
protected:
    typedef Ogre::vector<Ogre::ConstBufferPacked*>::type ConstBufferPackedVec;
 
    ConstBufferPackedVec mPerObjectDataBuffers;
 
    Ogre::ConstBufferPacked* ogre_nullable mCurrPerObjectDataBuffer;
 
    Ogre::ConstBufferPacked* ogre_nullable mLastMainConstBuffer;
 
    float* ogre_nullable mCurrPerObjectDataPtr;
 
    Ogre::VaoManager* ogre_nullable mOwnVaoManager;
 
    void bindObjectDataBuffer(Ogre::CommandBuffer* commandBuffer, uint16_t perObjectDataBufferSlot);
 
    float* mapObjectDataBufferFor(uint32_t instanceIdx, Ogre::CommandBuffer* commandBuffer,
        Ogre::VaoManager* vaoManager,
        const ConstBufferPackedVec& constBuffers,
        uint32_t currConstBufferIdx, uint32_t* startMappedConstBuffer,
        uint16_t perObjectDataBufferSlot,
        uint16_t element_count);
 
    void unmapObjectDataBuffer();
 
    SharedHelperForHlms();
    ~SharedHelperForHlms();
};
 
class BlamHlmsPbs : public Ogre::HlmsPbs, public Ogre::HlmsListener, SharedHelperForHlms {
public:
    //static constexpr Ogre::uint32 kColourId = 7895211u;
 
    BlamHlmsPbs(Ogre::Archive* dataFolder, Ogre::ArchiveVec* libraryFolders) :
        HlmsPbs(dataFolder, libraryFolders)
    {
        // Set ourselves as our own listener.
        setListener(this);
    }
 
    void hlmsTypeChanged(bool casterPass, Ogre::CommandBuffer* commandBuffer,
        const Ogre::HlmsDatablock* datablock, size_t texUnit) override;
 
    void calculateHashForPreCreate(Ogre::Renderable* renderable, Ogre::PiecesMap* inOutPieces) override;
 
    using HlmsPbs::setupRootLayout;
    void setupRootLayout(Ogre::RootLayout& rootLayout, const Ogre::HlmsPropertyVec& properties,
        size_t tid) const override;
 
    Ogre::uint32 fillBuffersForV1(const Ogre::HlmsCache* cache, const Ogre::QueuedRenderable& queuedRenderable,
        bool casterPass, Ogre::uint32 lastCacheHash,
        Ogre::CommandBuffer* commandBuffer) override;
 
    Ogre::uint32 fillBuffersForV2(const Ogre::HlmsCache* cache, const Ogre::QueuedRenderable& queuedRenderable,
        bool casterPass, Ogre::uint32 lastCacheHash,
        Ogre::CommandBuffer* commandBuffer) override;
 
    void preCommandBufferExecution(Ogre::CommandBuffer* commandBuffer) override;
    void frameEnded() override;
};