metaforce/Runtime/Graphics/Shaders/CFluidPlaneShader.hpp

#pragma once

#include "RetroTypes.hpp"
#include "boo/graphicsdev/IGraphicsDataFactory.hpp"
#include "CModelShaders.hpp"
#include "World/CFluidPlaneManager.hpp"
#include "Graphics/CTexture.hpp"
#include "CToken.hpp"
#include "zeus/CAABox.hpp"
#include "Shaders/shader_CFluidPlaneShader.hpp"

namespace urde
{

class CFluidPlaneShader
{
public:
    struct Vertex
    {
        zeus::CVector3f m_pos;
        zeus::CVector3f m_norm;
        zeus::CVector3f m_binorm;
        zeus::CVector3f m_tangent;
        zeus::CColor m_color;

        Vertex() = default;
        Vertex(const zeus::CVector3f& position) : m_pos(position) {}
        Vertex(const zeus::CVector3f& position, const zeus::CColor& color)
        : m_pos(position), m_color(color) {}
        Vertex(const zeus::CVector3f& position, const zeus::CVector3f& normal,
               const zeus::CColor& color)
        : m_pos(position), m_norm(normal), m_color(color) {}
        Vertex(const zeus::CVector3f& position, const zeus::CVector3f& normal,
               const zeus::CVector3f& binormal, const zeus::CVector3f& tangent,
               const zeus::CColor& color)
        : m_pos(position), m_norm(normal), m_binorm(binormal), m_tangent(tangent), m_color(color) {}
    };

    struct PatchVertex
    {
        zeus::CVector4f m_pos;
        float m_outerLevels[4] = {};
        float m_innerLevels[4] = {};
    };

    struct RenderSetupInfo
    {
        zeus::CMatrix4f texMtxs[6];
        zeus::CMatrix4f normMtx;
        float indScale = 1.f;
        zeus::CColor kColors[4];
        std::vector<CLight> lights;
    };

private:
    struct ShaderPair
    {
        boo::ObjToken<boo::IShaderPipeline> m_regular;
        boo::ObjToken<boo::IShaderPipeline> m_tessellation;
        void reset()
        {
            m_regular.reset();
            m_tessellation.reset();
        }
    };

    struct BindingPair
    {
        boo::ObjToken<boo::IShaderDataBinding> m_regular;
        boo::ObjToken<boo::IShaderDataBinding> m_tessellation;
    };

    class Cache
    {
        ShaderPair m_cache[1024] = {};
        ShaderPair m_doorCache[8] = {};
        ShaderPair&
        CacheSlot(const SFluidPlaneShaderInfo& info, int i) { return m_cache[i]; }
        ShaderPair&
        CacheSlot(const SFluidPlaneDoorShaderInfo& info, int i) { return m_doorCache[i]; }
        static u16 MakeCacheKey(const SFluidPlaneShaderInfo& info);
        static u16 MakeCacheKey(const SFluidPlaneDoorShaderInfo& info);
    public:
        template<class T>
        ShaderPair GetOrBuildShader(const T& info);
        void Clear();
    };
    static Cache _cache;

    struct Ripple
    {
        zeus::CVector4f center; // time, distFalloff
        zeus::CVector4f params; // amplitude, lookupPhase, lookupTime
    };

    struct Uniform
    {
        zeus::CMatrix4f m_mv;
        zeus::CMatrix4f m_mvNorm;
        zeus::CMatrix4f m_proj;
        zeus::CMatrix4f m_texMtxs[6];
        Ripple m_ripple[20];
        zeus::CVector4f m_colorMul;
        zeus::CVector4f m_pad[3]; // rippleNormResolution, Pad out to 1280 bytes
        CModelShaders::LightingUniform m_lighting;
        zeus::CVector3f m_pad2; // Pad out to 768 bytes
    };

    TLockedToken<CTexture> m_patternTex1;
    TLockedToken<CTexture> m_patternTex2;
    TLockedToken<CTexture> m_colorTex;
    TLockedToken<CTexture> m_bumpMap;
    TLockedToken<CTexture> m_envMap;
    TLockedToken<CTexture> m_envBumpMap;
    TLockedToken<CTexture> m_lightmap;
    boo::ObjToken<boo::ITextureS> m_rippleMap;
    boo::ObjToken<boo::IGraphicsBufferD> m_vbo;
    boo::ObjToken<boo::IGraphicsBufferD> m_pvbo;
    boo::ObjToken<boo::IGraphicsBufferD> m_uniBuf;
    BindingPair m_dataBind;
    int m_lastBind = -1;

#if BOO_HAS_GL
    static ShaderPair BuildShader(boo::GLDataFactory::Context& ctx,
                                  const SFluidPlaneShaderInfo& info);
    static ShaderPair BuildShader(boo::GLDataFactory::Context& ctx,
                                  const SFluidPlaneDoorShaderInfo& info);
    BindingPair BuildBinding(boo::GLDataFactory::Context& ctx, const ShaderPair& pipeline);
#endif
#if _WIN32
    static ShaderPair BuildShader(boo::D3DDataFactory::Context& ctx,
                                  const SFluidPlaneShaderInfo& info);
    static ShaderPair BuildShader(boo::D3DDataFactory::Context& ctx,
                                  const SFluidPlaneDoorShaderInfo& info);
    BindingPair BuildBinding(boo::D3DDataFactory::Context& ctx, const ShaderPair& pipeline);
#endif
#if BOO_HAS_METAL
    static ShaderPair BuildShader(boo::MetalDataFactory::Context& ctx,
                                  const SFluidPlaneShaderInfo& info);
    static ShaderPair BuildShader(boo::MetalDataFactory::Context& ctx,
                                  const SFluidPlaneDoorShaderInfo& info);
    BindingPair BuildBinding(boo::MetalDataFactory::Context& ctx, const ShaderPair& pipeline);
#endif
#if BOO_HAS_VULKAN
    static ShaderPair BuildShader(boo::VulkanDataFactory::Context& ctx,
                                  const SFluidPlaneShaderInfo& info);
    static ShaderPair BuildShader(boo::VulkanDataFactory::Context& ctx,
                                  const SFluidPlaneDoorShaderInfo& info);
    BindingPair BuildBinding(boo::VulkanDataFactory::Context& ctx, const ShaderPair& pipeline);
#endif

    template <class F> static void _Shutdown();

    void PrepareBinding(const ShaderPair& pipeline, u32 maxVertCount);
public:
    CFluidPlaneShader(EFluidType type,
                      const TLockedToken<CTexture>& patternTex1,
                      const TLockedToken<CTexture>& patternTex2,
                      const TLockedToken<CTexture>& colorTex,
                      const TLockedToken<CTexture>& bumpMap,
                      const TLockedToken<CTexture>& envMap,
                      const TLockedToken<CTexture>& envBumpMap,
                      const TLockedToken<CTexture>& lightmap,
                      const boo::ObjToken<boo::ITextureS>& rippleMap,
                      bool doubleLightmapBlend, bool additive, u32 maxVertCount);
    CFluidPlaneShader(const TLockedToken<CTexture>& patternTex1,
                      const TLockedToken<CTexture>& patternTex2,
                      const TLockedToken<CTexture>& colorTex,
                      u32 maxVertCount);
    void prepareDraw(const RenderSetupInfo& info);
    void prepareDraw(const RenderSetupInfo& info,
                     const zeus::CVector3f& waterCenter,
                     const CRippleManager& rippleManager,
                     const zeus::CColor& colorMul,
                     float rippleNormResolution);
    void bindRegular()
    {
        if (m_lastBind != 0)
        {
            CGraphics::SetShaderDataBinding(m_dataBind.m_regular);
            m_lastBind = 0;
        }
    }
    bool bindTessellation()
    {
        if (m_lastBind != 1)
        {
            CGraphics::SetShaderDataBinding(m_dataBind.m_tessellation);
            m_lastBind = 1;
        }
        return true;
    }
    void doneDrawing() { m_lastBind = -1; }
    void loadVerts(const std::vector<Vertex>& verts, const std::vector<PatchVertex>& pVerts);

    static void Shutdown();
};

}