render_layer.h

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#ifndef GAME_MAP_RENDER_LAYER_H
#define GAME_MAP_RENDER_LAYER_H
 
#include <cstdint>
 
using offset_ptr_size = char *;
using offset_ptr = uintptr_t;
using offset_ptr32 = unsigned int;
 
#include <base/color.h>
 
#include <engine/graphics.h>
 
#include <game/map/envelope_manager.h>
#include <game/map/render_component.h>
#include <game/map/render_map.h>
#include <game/mapitems.h>
#include <game/mapitems_ex.h>
 
#include <memory>
#include <optional>
#include <vector>
 
class CMapLayers;
class CMapItemLayerTilemap;
class CMapItemLayerQuads;
class IMap;
class CMapImages;
 
typedef std::function<void(int GroupId, int LayerId)> FCallbackLayerInit;
 
constexpr int BorderRenderDistance = 201;
 
class CClipRegion
{
public:
    CClipRegion() = default;
    CClipRegion(float X, float Y, float Width, float Height) :
        m_X(X), m_Y(Y), m_Width(Width), m_Height(Height) {}
 
    float m_X;
    float m_Y;
    float m_Width;
    float m_Height;
};
 
class CRenderLayerParams
{
public:
    int m_RenderType;
    int m_EntityOverlayVal;
    vec2 m_Center;
    float m_Zoom;
    bool m_RenderText;
    bool m_RenderInvalidTiles;
    bool m_TileAndQuadBuffering;
    bool m_RenderTileBorder;
    bool m_DebugRenderGroupClips;
    bool m_DebugRenderQuadClips;
    bool m_DebugRenderClusterClips;
    bool m_DebugRenderTileClips;
};
 
class CRenderLayer : public CRenderComponent
{
public:
    CRenderLayer(int GroupId, int LayerId, int Flags);
    virtual void OnInit(IGraphics *pGraphics, ITextRender *pTextRender, CRenderMap *pRenderMap, std::shared_ptr<CEnvelopeManager> &pEnvelopeManager, IMap *pMap, IMapImages *pMapImages, std::optional<FCallbackLayerInit> &CallbackLayerInitOptional);
 
    virtual void Init() = 0;
    virtual void Render(const CRenderLayerParams &Params) = 0;
    virtual bool DoRender(const CRenderLayerParams &Params) = 0;
    virtual bool IsValid() const { return true; }
    virtual bool IsGroup() const { return false; }
    virtual void Unload() = 0;
 
    bool IsVisibleInClipRegion(const std::optional<CClipRegion> &ClipRegion) const;
    int GetGroup() const { return m_GroupId; }
 
protected:
    int m_GroupId;
    int m_LayerId;
    int m_Flags;
 
    void UseTexture(IGraphics::CTextureHandle TextureHandle);
    virtual IGraphics::CTextureHandle GetTexture() const = 0;
    virtual void InitCallback() const;
 
    class IMap *m_pMap = nullptr;
    IMapImages *m_pMapImages = nullptr;
    std::shared_ptr<CEnvelopeManager> m_pEnvelopeManager;
    std::optional<FCallbackLayerInit> m_InitCallback;
    std::optional<CClipRegion> m_LayerClip;
};
 
class CRenderLayerGroup : public CRenderLayer
{
public:
    CRenderLayerGroup(int GroupId, CMapItemGroup *pGroup);
    ~CRenderLayerGroup() override = default;
    void Init() override;
    void Render(const CRenderLayerParams &Params) override;
    bool DoRender(const CRenderLayerParams &Params) override;
    bool IsValid() const override { return m_pGroup != nullptr; }
    bool IsGroup() const override { return true; }
    void Unload() override {}
    void InitCallback() const override;
 
protected:
    IGraphics::CTextureHandle GetTexture() const override
    {
        return IGraphics::CTextureHandle();
    }
 
    CMapItemGroup *m_pGroup;
};
 
class CRenderLayerTile : public CRenderLayer
{
public:
    CRenderLayerTile(int GroupId, int LayerId, int Flags, CMapItemLayerTilemap *pLayerTilemap);
    ~CRenderLayerTile() override = default;
    void Render(const CRenderLayerParams &Params) override;
    bool DoRender(const CRenderLayerParams &Params) override;
    void Init() override;
    void OnInit(IGraphics *pGraphics, ITextRender *pTextRender, CRenderMap *pRenderMap, std::shared_ptr<CEnvelopeManager> &pEnvelopeManager, IMap *pMap, IMapImages *pMapImages, std::optional<FCallbackLayerInit> &CallbackLayerInitOptional) override;
 
    virtual int GetDataIndex() const;
    bool IsValid() const override { return GetRawData() != nullptr; }
    void Unload() override;
 
protected:
    virtual void *GetRawData() const;
    template<class T>
    T *GetData() const;
 
    virtual ColorRGBA GetRenderColor(const CRenderLayerParams &Params) const;
    virtual void InitTileData();
    virtual void GetTileData(unsigned char *pIndex, unsigned char *pFlags, int *pAngleRotate, unsigned int x, unsigned int y, int CurOverlay) const;
    IGraphics::CTextureHandle GetTexture() const override { return m_TextureHandle; }
    CTile *m_pTiles;
 
private:
    IGraphics::CTextureHandle m_TextureHandle;
 
protected:
    class CTileLayerVisuals : public CRenderComponent
    {
    public:
        CTileLayerVisuals()
        {
            m_Width = 0;
            m_Height = 0;
            m_BufferContainerIndex = -1;
            m_IsTextured = false;
        }
 
        bool Init(unsigned int Width, unsigned int Height);
        void Unload();
 
        class CTileVisual
        {
        public:
            CTileVisual() :
                m_IndexBufferByteOffset(0) {}
 
        private:
            offset_ptr32 m_IndexBufferByteOffset;
 
        public:
            bool DoDraw() const
            {
                return (m_IndexBufferByteOffset & 0x10000000) != 0;
            }
 
            void Draw(bool SetDraw)
            {
                m_IndexBufferByteOffset = (SetDraw ? 0x10000000 : (offset_ptr32)0) | (m_IndexBufferByteOffset & 0xEFFFFFFF);
            }
 
            offset_ptr IndexBufferByteOffset() const
            {
                return ((offset_ptr)(m_IndexBufferByteOffset & 0xEFFFFFFF) * 6 * sizeof(uint32_t));
            }
 
            void SetIndexBufferByteOffset(offset_ptr32 IndexBufferByteOff)
            {
                m_IndexBufferByteOffset = IndexBufferByteOff | (m_IndexBufferByteOffset & 0x10000000);
            }
 
            void AddIndexBufferByteOffset(offset_ptr32 IndexBufferByteOff)
            {
                m_IndexBufferByteOffset = ((m_IndexBufferByteOffset & 0xEFFFFFFF) + IndexBufferByteOff) | (m_IndexBufferByteOffset & 0x10000000);
            }
        };
 
        std::vector<CTileVisual> m_vTilesOfLayer;
 
        CTileVisual m_BorderTopLeft;
        CTileVisual m_BorderTopRight;
        CTileVisual m_BorderBottomRight;
        CTileVisual m_BorderBottomLeft;
 
        CTileVisual m_BorderKillTile; // end of map kill tile -- game layer only
 
        std::vector<CTileVisual> m_vBorderTop;
        std::vector<CTileVisual> m_vBorderLeft;
        std::vector<CTileVisual> m_vBorderRight;
        std::vector<CTileVisual> m_vBorderBottom;
 
        unsigned int m_Width;
        unsigned int m_Height;
        int m_BufferContainerIndex;
        bool m_IsTextured;
    };
 
    void UploadTileData(std::optional<CTileLayerVisuals> &VisualsOptional, int CurOverlay, bool AddAsSpeedup, bool IsGameLayer = false);
 
    virtual void RenderTileLayerWithTileBuffer(const ColorRGBA &Color, const CRenderLayerParams &Params);
    virtual void RenderTileLayerNoTileBuffer(const ColorRGBA &Color, const CRenderLayerParams &Params);
 
    void RenderTileLayer(const ColorRGBA &Color, const CRenderLayerParams &Params, CTileLayerVisuals *pTileLayerVisuals = nullptr);
    void RenderTileBorder(const ColorRGBA &Color, int BorderX0, int BorderY0, int BorderX1, int BorderY1, CTileLayerVisuals *pTileLayerVisuals);
    void RenderKillTileBorder(const ColorRGBA &Color);
 
    std::optional<CRenderLayerTile::CTileLayerVisuals> m_VisualTiles;
    CMapItemLayerTilemap *m_pLayerTilemap;
    ColorRGBA m_Color;
};
 
class CRenderLayerQuads : public CRenderLayer
{
public:
    CRenderLayerQuads(int GroupId, int LayerId, int Flags, CMapItemLayerQuads *pLayerQuads);
    void OnInit(IGraphics *pGraphics, ITextRender *pTextRender, CRenderMap *pRenderMap, std::shared_ptr<CEnvelopeManager> &pEnvelopeManager, IMap *pMap, IMapImages *pMapImages, std::optional<FCallbackLayerInit> &CallbackLayerInitOptional) override;
    void Init() override;
    bool IsValid() const override { return m_pLayerQuads->m_NumQuads > 0 && m_pQuads; }
    void Render(const CRenderLayerParams &Params) override;
    bool DoRender(const CRenderLayerParams &Params) override;
    void Unload() override;
 
protected:
    IGraphics::CTextureHandle GetTexture() const override { return m_TextureHandle; }
 
    class CQuadLayerVisuals : public CRenderComponent
    {
    public:
        CQuadLayerVisuals() :
            m_QuadNum(0), m_BufferContainerIndex(-1), m_IsTextured(false) {}
        void Unload();
 
        int m_QuadNum;
        int m_BufferContainerIndex;
        bool m_IsTextured;
    };
    void RenderQuadLayer(float Alpha, const CRenderLayerParams &Params);
 
    std::optional<CRenderLayerQuads::CQuadLayerVisuals> m_VisualQuad;
    CMapItemLayerQuads *m_pLayerQuads;
 
    class CQuadCluster
    {
    public:
        bool m_Grouped;
        int m_StartIndex;
        int m_NumQuads;
 
        int m_PosEnv;
        float m_PosEnvOffset;
        int m_ColorEnv;
        float m_ColorEnvOffset;
 
        std::vector<SQuadRenderInfo> m_vQuadRenderInfo;
        std::optional<CClipRegion> m_ClipRegion;
    };
    void CalculateClipping(CQuadCluster &QuadCluster);
    bool CalculateQuadClipping(const CQuadCluster &QuadCluster, float aQuadOffsetMin[2], float aQuadOffsetMax[2]) const;
 
    std::vector<CQuadCluster> m_vQuadClusters;
    CQuad *m_pQuads;
 
private:
    IGraphics::CTextureHandle m_TextureHandle;
};
 
class CRenderLayerEntityBase : public CRenderLayerTile
{
public:
    CRenderLayerEntityBase(int GroupId, int LayerId, int Flags, CMapItemLayerTilemap *pLayerTilemap);
    ~CRenderLayerEntityBase() override = default;
    bool DoRender(const CRenderLayerParams &Params) override;
 
protected:
    ColorRGBA GetRenderColor(const CRenderLayerParams &Params) const override { return ColorRGBA(1.0f, 1.0f, 1.0f, Params.m_EntityOverlayVal / 100.0f); }
    IGraphics::CTextureHandle GetTexture() const override;
};
 
class CRenderLayerEntityGame final : public CRenderLayerEntityBase
{
public:
    CRenderLayerEntityGame(int GroupId, int LayerId, int Flags, CMapItemLayerTilemap *pLayerTilemap);
    void Init() override;
 
protected:
    void RenderTileLayerWithTileBuffer(const ColorRGBA &Color, const CRenderLayerParams &Params) override;
    void RenderTileLayerNoTileBuffer(const ColorRGBA &Color, const CRenderLayerParams &Params) override;
 
private:
    ColorRGBA GetDeathBorderColor() const;
};
 
class CRenderLayerEntityFront final : public CRenderLayerEntityBase
{
public:
    CRenderLayerEntityFront(int GroupId, int LayerId, int Flags, CMapItemLayerTilemap *pLayerTilemap);
    int GetDataIndex() const override;
};
 
class CRenderLayerEntityTele final : public CRenderLayerEntityBase
{
public:
    CRenderLayerEntityTele(int GroupId, int LayerId, int Flags, CMapItemLayerTilemap *pLayerTilemap);
    int GetDataIndex() const override;
    void Init() override;
    void InitTileData() override;
    void Unload() override;
 
protected:
    void RenderTileLayerWithTileBuffer(const ColorRGBA &Color, const CRenderLayerParams &Params) override;
    void RenderTileLayerNoTileBuffer(const ColorRGBA &Color, const CRenderLayerParams &Params) override;
    void GetTileData(unsigned char *pIndex, unsigned char *pFlags, int *pAngleRotate, unsigned int x, unsigned int y, int CurOverlay) const override;
 
private:
    std::optional<CRenderLayerTile::CTileLayerVisuals> m_VisualTeleNumbers;
    CTeleTile *m_pTeleTiles;
};
 
class CRenderLayerEntitySpeedup final : public CRenderLayerEntityBase
{
public:
    CRenderLayerEntitySpeedup(int GroupId, int LayerId, int Flags, CMapItemLayerTilemap *pLayerTilemap);
    int GetDataIndex() const override;
    void Init() override;
    void InitTileData() override;
    void Unload() override;
 
protected:
    void RenderTileLayerWithTileBuffer(const ColorRGBA &Color, const CRenderLayerParams &Params) override;
    void RenderTileLayerNoTileBuffer(const ColorRGBA &Color, const CRenderLayerParams &Params) override;
    void GetTileData(unsigned char *pIndex, unsigned char *pFlags, int *pAngleRotate, unsigned int x, unsigned int y, int CurOverlay) const override;
    IGraphics::CTextureHandle GetTexture() const override;
 
private:
    std::optional<CRenderLayerTile::CTileLayerVisuals> m_VisualForce;
    std::optional<CRenderLayerTile::CTileLayerVisuals> m_VisualMaxSpeed;
    CSpeedupTile *m_pSpeedupTiles;
};
 
class CRenderLayerEntitySwitch final : public CRenderLayerEntityBase
{
public:
    CRenderLayerEntitySwitch(int GroupId, int LayerId, int Flags, CMapItemLayerTilemap *pLayerTilemap);
    int GetDataIndex() const override;
    void Init() override;
    void InitTileData() override;
    void Unload() override;
 
protected:
    void RenderTileLayerWithTileBuffer(const ColorRGBA &Color, const CRenderLayerParams &Params) override;
    void RenderTileLayerNoTileBuffer(const ColorRGBA &Color, const CRenderLayerParams &Params) override;
    void GetTileData(unsigned char *pIndex, unsigned char *pFlags, int *pAngleRotate, unsigned int x, unsigned int y, int CurOverlay) const override;
    IGraphics::CTextureHandle GetTexture() const override;
 
private:
    std::optional<CRenderLayerTile::CTileLayerVisuals> m_VisualSwitchNumberTop;
    std::optional<CRenderLayerTile::CTileLayerVisuals> m_VisualSwitchNumberBottom;
    CSwitchTile *m_pSwitchTiles;
};
 
class CRenderLayerEntityTune final : public CRenderLayerEntityBase
{
public:
    CRenderLayerEntityTune(int GroupId, int LayerId, int Flags, CMapItemLayerTilemap *pLayerTilemap);
    int GetDataIndex() const override;
    void Init() override;
    void InitTileData() override;
 
protected:
    void RenderTileLayerNoTileBuffer(const ColorRGBA &Color, const CRenderLayerParams &Params) override;
    void GetTileData(unsigned char *pIndex, unsigned char *pFlags, int *pAngleRotate, unsigned int x, unsigned int y, int CurOverlay) const override;
    IGraphics::CTextureHandle GetTexture() const override;
 
private:
    CTuneTile *m_pTuneTiles;
    mutable CTuneColorMapper m_TuneColorMapper;
};
#endif