metaforce/Runtime/Graphics/CGraphics.hpp

#pragma once

#include "Runtime/RetroTypes.hpp"
#include "Runtime/Graphics/GX.hpp"
#include "Runtime/Graphics/CTevCombiners.hpp"
#include "Runtime/ConsoleVariables/CVar.hpp"

#include <array>
#include <chrono>
#include <vector>

#include <zeus/CColor.hpp>
#include <zeus/CTransform.hpp>
#include <zeus/CVector2f.hpp>
#include <zeus/CVector2i.hpp>

#include <aurora/gfx.hpp>
#include <optick.h>

using frame_clock = std::chrono::high_resolution_clock;

namespace metaforce {
class CTexture;
extern CVar* g_disableLighting;
class CLight;
class CTimeProvider;

enum class ERglLight : u8 { Zero = 0, One, Two, Three, Four, Five, Six, Seven };

enum class ERglLightBits : u8 {
  None = 0,
  Zero = 1,
  One = 1 << 1,
  Two = 1 << 2,
  Three = 1 << 3,
  Four = 1 << 4,
  Five = 1 << 5,
  Six = 1 << 6,
  Seven = 1 << 7
};
ENABLE_BITWISE_ENUM(ERglLightBits)

struct SViewport {
  u32 x0_left;
  u32 x4_top;
  u32 x8_width;
  u32 xc_height;
  float x10_halfWidth;
  float x14_halfHeight;
  float aspect;
};

struct SClipScreenRect {
  bool x0_valid = false;
  int x4_left = 0;
  int x8_top = 0;
  int xc_width = 0;
  int x10_height = 0;
  int x14_dstWidth = 0;
  float x18_uvXMin = 0.f;
  float x1c_uvXMax = 0.f;
  float x20_uvYMin = 0.f;
  float x24_uvYMax = 0.f;

  SClipScreenRect() = default;
  SClipScreenRect(bool valid, int left, int top, int width, int height, int dstWidth, float uvXMin, float uvXMax,
                  float uvYMin, float uvYMax)
  : x0_valid(valid)
  , x4_left(left)
  , x8_top(top)
  , xc_width(width)
  , x10_height(height)
  , x14_dstWidth(dstWidth)
  , x18_uvXMin(uvXMin)
  , x1c_uvXMax(uvXMax)
  , x20_uvYMin(uvYMin)
  , x24_uvYMax(uvYMax) {}

  SClipScreenRect(const aurora::gfx::ClipRect& rect) {
    x4_left = rect.x;
    x8_top = rect.y;
    xc_width = rect.width;
    x10_height = rect.height;
    x14_dstWidth = rect.width;
  }

  SClipScreenRect(const SViewport& vp) {
    x4_left = vp.x0_left;
    x8_top = vp.x4_top;
    xc_width = vp.x8_width;
    x10_height = vp.xc_height;
  }
};

#define DEPTH_FAR 1.f
#define DEPTH_SKY 0.999f
#define DEPTH_TARGET_MANAGER 0.12500012f
#define DEPTH_WORLD (1.f / 8.f)
#define DEPTH_GUN (1.f / 32.f)
#define DEPTH_SCREEN_ACTORS (1.f / 64.f)
#define DEPTH_HUD (1.f / 512.f)
#define DEPTH_NEAR 0.f
#define CUBEMAP_RES 256
#define CUBEMAP_MIPS 6

class CGraphics {
public:
  struct CProjectionState {
    bool x0_persp;
    float x4_left;
    float x8_right;
    float xc_top;
    float x10_bottom;
    float x14_near;
    float x18_far;
  };

  static CProjectionState g_Proj;
  static zeus::CVector2f g_CachedDepthRange;
  static CFogState g_Fog;
  static SViewport g_Viewport;
  static std::array<zeus::CColor, 3> g_ColorRegs;
  static float g_ProjAspect;
  static u32 g_NumLightsActive;
  static u32 g_NumBreakpointsWaiting;
  static u32 g_FlippingState;
  static bool g_LastFrameUsedAbove;
  static bool g_InterruptLastFrameUsedAbove;
  static ERglLightBits g_LightActive;
  static ERglLightBits g_LightsWereOn;
  static zeus::CTransform g_GXModelView;
  static zeus::CTransform g_GXModelViewInvXpose;
  static zeus::CTransform g_GXModelMatrix;
  static zeus::CTransform g_ViewMatrix;
  static zeus::CVector3f g_ViewPoint;
  static zeus::CTransform g_GXViewPointMatrix;
  static zeus::CTransform g_CameraMatrix;
  static SClipScreenRect g_CroppedViewport;
  static bool g_IsGXModelMatrixIdentity;
  static zeus::CColor g_ClearColor;
  static float g_ClearDepthValue; // Was a 24bit value, we use a float range from [0,1]
  static bool g_IsBeginSceneClearFb;

  static ERglEnum g_depthFunc;
  static ERglCullMode g_cullMode;

  static void DisableAllLights();
  static void LoadLight(ERglLight light, const CLight& info);
  static void EnableLight(ERglLight light);
  static void SetLightState(ERglLightBits lightState);
  static void SetAmbientColor(const zeus::CColor& col);
  static void SetFog(ERglFogMode mode, float startz, float endz, const zeus::CColor& color);
  static void SetDepthWriteMode(bool test, ERglEnum comp, bool write);
  static void SetBlendMode(ERglBlendMode, ERglBlendFactor, ERglBlendFactor, ERglLogicOp);
  static void SetCullMode(ERglCullMode);
  static void BeginScene();
  static void EndScene();
  static void Render2D(const CTexture& tex, u32 x, u32 y, u32 w, u32 h, const zeus::CColor& col);
  static bool BeginRender2D(const CTexture& tex);
  static void DoRender2D(const CTexture& tex, s32 x, s32 y, s32 w1, s32 w2, s32 w3, s32 w4, s32 w5,
                         const zeus::CColor& col);
  static void EndRender2D(bool v);
  static void SetAlphaCompare(ERglAlphaFunc comp0, u8 ref0, ERglAlphaOp op, ERglAlphaFunc comp1, u8 ref1);
  static void SetViewPointMatrix(const zeus::CTransform& xf);
  static void SetViewMatrix();
  static void SetModelMatrix(const zeus::CTransform& xf);
  static zeus::CMatrix4f CalculatePerspectiveMatrix(float fovy, float aspect, float znear, float zfar,
                                                    bool forRenderer);
  static zeus::CMatrix4f GetPerspectiveProjectionMatrix(bool forRenderer);
  static const CProjectionState& GetProjectionState();
  static void SetProjectionState(const CProjectionState&);
  static void SetPerspective(float fovy, float aspect, float znear, float zfar);
  static void SetOrtho(float left, float right, float top, float bottom, float znear, float zfar);
  static void FlushProjection();
  static zeus::CVector2i ProjectPoint(const zeus::CVector3f& point);
  static SClipScreenRect ClipScreenRectFromMS(const zeus::CVector3f& p1, const zeus::CVector3f& p2);
  static SClipScreenRect ClipScreenRectFromVS(const zeus::CVector3f& p1, const zeus::CVector3f& p2);
  static zeus::CVector3f ProjectModelPointToViewportSpace(const zeus::CVector3f& point);
  static zeus::CVector3f ProjectModelPointToViewportSpace(const zeus::CVector3f& point, float& wOut);

  static void SetViewportResolution(const zeus::CVector2i& res);
  static void SetViewport(int leftOff, int bottomOff, int width, int height);
  static void SetScissor(int leftOff, int bottomOff, int width, int height);
  static void SetDepthRange(float near, float far);

  static CTimeProvider* g_ExternalTimeProvider;
  static float g_DefaultSeconds;
  static u32 g_RenderTimings;
  static void SetExternalTimeProvider(CTimeProvider* provider) { g_ExternalTimeProvider = provider; }
  static float GetSecondsMod900();
  static void TickRenderTimings();
  static u32 g_FrameCounter;
  static u32 g_Framerate;
  static u32 g_FramesPast;
  static frame_clock::time_point g_FrameStartTime;
  static u32 GetFrameCounter() { return g_FrameCounter; }
  static u32 GetFPS() { return g_Framerate; }
  static void UpdateFPSCounter();
  static void SetUseVideoFilter(bool);
  static void SetClearColor(const zeus::CColor& color);
  static void SetCopyClear(const zeus::CColor& color, float depth);
  static void SetIsBeginSceneClearFb(bool clear);
  static u32 GetViewportLeft() { return g_Viewport.x0_left; }
  static u32 GetViewportTop() { return g_Viewport.x4_top; }
  static u32 GetViewportWidth() { return g_Viewport.x8_width; }
  static u32 GetViewportHeight() { return g_Viewport.xc_height; }
  static float GetViewportHalfWidth() { return g_Viewport.x10_halfWidth; }
  static float GetViewportHalfHeight() { return g_Viewport.x14_halfHeight; }
  static float GetViewportAspect() { return g_Viewport.aspect; }
  static bool IsCroppedViewportValid() { return g_CroppedViewport.x0_valid; }
  static int GetCroppedViewportLeft() { return g_CroppedViewport.x4_left; }
  static int GetCroppedViewportTop() { return g_CroppedViewport.x8_top; }
  static int GetCroppedViewportWidth() { return g_CroppedViewport.xc_width; }
  static int GetCroppedViewportHeight() { return g_CroppedViewport.x10_height; }
  static float GetCroppedViewportDstWidth() { return g_CroppedViewport.x14_dstWidth; }
  static float GetCroppedViewportUVXMin() { return g_CroppedViewport.x18_uvXMin; }
  static float GetCroppedViewportUVXMax() { return g_CroppedViewport.x1c_uvXMax; }
  static float GetCroppedViewportUVYMin() { return g_CroppedViewport.x20_uvYMin; }
  static float GetCroppedViewportUVYMax() { return g_CroppedViewport.x24_uvYMax; }

  //  static boo::IGraphicsDataFactory::Platform g_BooPlatform;
  //  static const char* g_BooPlatformName;
  //  static boo::IGraphicsDataFactory* g_BooFactory;
  //  static boo::IGraphicsCommandQueue* g_BooMainCommandQueue;
  //  static boo::ObjToken<boo::ITextureR> g_SpareTexture;

  static const std::array<zeus::CMatrix3f, 6> skCubeBasisMats;

  //  static void InitializeBoo(boo::IGraphicsDataFactory* factory, boo::IGraphicsCommandQueue* cc,
  //                            const boo::ObjToken<boo::ITextureR>& spareTex) {
  //    g_BooPlatform = factory->platform();
  //    g_BooPlatformName = factory->platformName();
  //    g_BooFactory = factory;
  //    g_BooMainCommandQueue = cc;
  //    g_SpareTexture = spareTex;
  //  }
  //
  //  static void ShutdownBoo() {
  //    g_BooFactory = nullptr;
  //    g_BooMainCommandQueue = nullptr;
  //    g_SpareTexture.reset();
  //  }
  //
  //  static const char* PlatformName() { return g_BooPlatformName; }

  //  static void CommitResources(const boo::FactoryCommitFunc& commitFunc __BooTraceArgs) {
  //    g_BooFactory->commitTransaction(commitFunc __BooTraceArgsUse);
  //  }

  //  static bool g_commitAsLazy;
  //  static void SetCommitResourcesAsLazy(bool newStatus) {
  //    if (newStatus != g_commitAsLazy) {
  //      g_commitAsLazy = newStatus;
  //      if (!newStatus && g_BooFactory) {
  //        g_BooFactory->commitPendingTransaction();
  //      }
  //    }
  //  }
  //
  //  static void CommitResources(const boo::FactoryCommitFunc& commitFunc __BooTraceArgs) {
  //    CommitResources(commitFunc __BooTraceArgsUse, g_commitAsLazy);
  //  }
  //
  //  static void CommitResources(const boo::FactoryCommitFunc& commitFunc __BooTraceArgs, bool lazy) {
  //    if (!g_BooFactory) {
  //      return;
  //    }
  //    if (lazy) {
  //      g_BooFactory->lazyCommitTransaction(commitFunc __BooTraceArgsUse);
  //    } else {
  //      g_BooFactory->commitTransaction(commitFunc __BooTraceArgsUse);
  //    }
  //  }
  //
  //  static void SetShaderDataBinding(const boo::ObjToken<boo::IShaderDataBinding>& binding) {
  //    g_BooMainCommandQueue->setShaderDataBinding(binding);
  //  }
  static void ResolveSpareTexture(const SClipScreenRect& rect, int bindIdx = 0, bool clearDepth = false) {
    aurora::gfx::resolve_color({rect.x4_left, rect.x8_top, rect.xc_width, rect.x10_height}, bindIdx, clearDepth);
    //    boo::SWindowRect wrect = {rect.x4_left, rect.x8_top, rect.xc_width, rect.x10_height};
    //    g_BooMainCommandQueue->resolveBindTexture(g_SpareTexture, wrect, true, bindIdx, true, false, clearDepth);
  }
  static void ResolveSpareDepth(const SClipScreenRect& rect, int bindIdx = 0) {
    aurora::gfx::resolve_depth({rect.x4_left, rect.x8_top, rect.xc_width, rect.x10_height}, bindIdx);
    //    boo::SWindowRect wrect = {rect.x4_left, rect.x8_top, rect.xc_width, rect.x10_height};
    //    g_BooMainCommandQueue->resolveBindTexture(g_SpareTexture, wrect, true, bindIdx, false, true);
  }
  //  static void DrawInstances(size_t start, size_t count, size_t instCount, size_t startInst = 0) {
  //    g_BooMainCommandQueue->drawInstances(start, count, instCount, startInst);
  //  }
  //  static void DrawArray(size_t start, size_t count) { g_BooMainCommandQueue->draw(start, count); }
  //  static void DrawArrayIndexed(size_t start, size_t count) { g_BooMainCommandQueue->drawIndexed(start, count); }

  static void SetTevOp(ERglTevStage stage, const CTevCombiners::CTevPass& pass);
  static void StreamBegin(GX::Primitive primitive);
  static void StreamNormal(const zeus::CVector3f& nrm);
  static void StreamColor(float r, float g, float b, float a);
  static void StreamColor(const zeus::CColor& color);
  static void StreamTexcoord(float x, float y);
  static void StreamTexcoord(const zeus::CVector2f& uv);
  static void StreamVertex(float xyz);
  static void StreamVertex(float x, float y, float z);
  static void StreamVertex(const zeus::CVector3f& pos);
  static void StreamEnd();
};

template <class VTX>
class TriFanToStrip {
  std::vector<VTX>& m_vec;
  size_t m_start;
  size_t m_added = 0;

public:
  explicit TriFanToStrip(std::vector<VTX>& vec) : m_vec(vec), m_start(vec.size()) {}

  void AddVert(const VTX& vert) {
    ++m_added;
    if (m_added > 3 && (m_added & 1) == 0) {
      m_vec.reserve(m_vec.size() + 3);
      m_vec.push_back(m_vec.back());
      m_vec.push_back(m_vec[m_start]);
    }
    m_vec.push_back(vert);
  }

  template <class... _Args>
  void EmplaceVert(_Args&&... args) {
    ++m_added;
    if (m_added > 3 && (m_added & 1) == 0) {
      m_vec.reserve(m_vec.size() + 3);
      m_vec.push_back(m_vec.back());
      m_vec.push_back(m_vec[m_start]);
    }
    m_vec.emplace_back(std::forward<_Args>(args)...);
  }

  //  void Draw() const { CGraphics::DrawArray(m_start, m_vec.size() - m_start); }
};

#ifdef BOO_GRAPHICS_DEBUG_GROUPS
class GraphicsDebugGroup {
  /* Stack only */
  void* operator new(size_t);
  void operator delete(void*);
  void* operator new[](size_t);
  void operator delete[](void*);

public:
  explicit GraphicsDebugGroup(const char* name, const zeus::CColor& color = zeus::skWhite) {
    zeus::simd_floats f(color.mSimd);
    CGraphics::g_BooMainCommandQueue->pushDebugGroup(name, f.array());
  }
  ~GraphicsDebugGroup() { CGraphics::g_BooMainCommandQueue->popDebugGroup(); }
};
#define SCOPED_GRAPHICS_DEBUG_GROUP(...) GraphicsDebugGroup _GfxDbg_(__VA_ARGS__);
#else
#define SCOPED_GRAPHICS_DEBUG_GROUP(name, ...) OPTICK_EVENT_DYNAMIC(name)
#endif

} // namespace metaforce