Add initial imgui implementation

.gitmodules

@@ -58,3 +58,6 @@
 	path = extern/zeus
 	url = ../zeus.git
 	branch = master
+[submodule "extern/imgui"]
+	path = extern/imgui
+	url = https://github.com/ocornut/imgui.git

CMakeLists.txt

@@ -396,6 +396,7 @@ add_subdirectory(extern/boo)
 add_subdirectory(hecl/shaderc)
 include(hecl/ApplicationTools.cmake)
 add_subdirectory(Shaders)
+add_subdirectory(imgui)
 add_subdirectory(extern/libSquish)
 add_subdirectory(extern/libpng)
 add_subdirectory(extern/libjpeg-turbo)

Runtime/CMain.cpp

@@ -1,17 +1,21 @@
 #include <string>
 #include <string_view>
-#include <iostream>
 #include <hecl/Pipeline.hpp>
 
 #include "boo/boo.hpp"
 #include "logvisor/logvisor.hpp"
 
+#include "ImGuiEngine.hpp"
 #include "Runtime/Graphics/CGraphics.hpp"
 #include "Runtime/MP1/MP1.hpp"
-#include "cmake-build-debug-llvm/hecl/DataSpecRegistry.hpp"
 #include "amuse/BooBackend.hpp"
+
 #include "../version.h"
 
+/* Static reference to dataspec additions
+ * (used by MSVC to definitively link DataSpecs) */
+#include "DataSpecRegistry.hpp"
+
 using namespace std::literals;
 
 static logvisor::Module AthenaLog("Athena");
@@ -104,10 +108,14 @@ static hecl::SystemString CPUFeatureString(const zeus::CPUInfo& cpuInf) {
 }
 
 struct WindowCallback : boo::IWindowCallback {
+  friend struct Application;
+
+private:
   bool m_fullscreenToggleRequested = false;
   boo::SWindowRect m_lastRect;
   bool m_rectDirty = false;
   bool m_windowInvalid = false;
+  ImGuiWindowCallback m_imguiCallback;
 
   void resized(const boo::SWindowRect& rect, bool sync) override {
     m_lastRect = rect;
@@ -115,11 +123,12 @@ struct WindowCallback : boo::IWindowCallback {
   }
 
   void mouseDown(const boo::SWindowCoord& coord, boo::EMouseButton button, boo::EModifierKey mods) override {
-    if (g_mainMP1) {
+    if (!ImGuiWindowCallback::m_mouseCaptured && g_mainMP1) {
       if (MP1::CGameArchitectureSupport* as = g_mainMP1->GetArchSupport()) {
         as->mouseDown(coord, button, mods);
       }
     }
+    m_imguiCallback.mouseDown(coord, button, mods);
   }
 
   void mouseUp(const boo::SWindowCoord& coord, boo::EMouseButton button, boo::EModifierKey mods) override {
@@ -128,30 +137,38 @@ struct WindowCallback : boo::IWindowCallback {
         as->mouseUp(coord, button, mods);
       }
     }
+    m_imguiCallback.mouseUp(coord, button, mods);
   }
 
   void mouseMove(const boo::SWindowCoord& coord) override {
-    if (g_mainMP1) {
+    if (!ImGuiWindowCallback::m_mouseCaptured && g_mainMP1) {
       if (MP1::CGameArchitectureSupport* as = g_mainMP1->GetArchSupport()) {
         as->mouseMove(coord);
       }
     }
+    m_imguiCallback.mouseMove(coord);
   }
 
+  void mouseEnter(const boo::SWindowCoord& coord) override { m_imguiCallback.mouseEnter(coord); }
+
+  void mouseLeave(const boo::SWindowCoord& coord) override { m_imguiCallback.mouseLeave(coord); }
+
   void scroll(const boo::SWindowCoord& coord, const boo::SScrollDelta& scroll) override {
-    if (g_mainMP1) {
+    if (!ImGuiWindowCallback::m_mouseCaptured && g_mainMP1) {
       if (MP1::CGameArchitectureSupport* as = g_mainMP1->GetArchSupport()) {
         as->scroll(coord, scroll);
       }
     }
+    m_imguiCallback.scroll(coord, scroll);
   }
 
   void charKeyDown(unsigned long charCode, boo::EModifierKey mods, bool isRepeat) override {
-    if (g_mainMP1) {
+    if (!ImGuiWindowCallback::m_keyboardCaptured && g_mainMP1) {
       if (MP1::CGameArchitectureSupport* as = g_mainMP1->GetArchSupport()) {
         as->charKeyDown(charCode, mods, isRepeat);
       }
     }
+    m_imguiCallback.charKeyDown(charCode, mods, isRepeat);
   }
 
   void charKeyUp(unsigned long charCode, boo::EModifierKey mods) override {
@@ -160,16 +177,19 @@ struct WindowCallback : boo::IWindowCallback {
         as->charKeyUp(charCode, mods);
       }
     }
+    m_imguiCallback.charKeyUp(charCode, mods);
   }
 
   void specialKeyDown(boo::ESpecialKey key, boo::EModifierKey mods, bool isRepeat) override {
-    if (g_mainMP1) {
+    if (!ImGuiWindowCallback::m_keyboardCaptured && g_mainMP1) {
       if (MP1::CGameArchitectureSupport* as = g_mainMP1->GetArchSupport()) {
         as->specialKeyDown(key, mods, isRepeat);
       }
     }
-    if (key == boo::ESpecialKey::Enter && True(mods & boo::EModifierKey::Alt))
+    if (key == boo::ESpecialKey::Enter && True(mods & boo::EModifierKey::Alt)) {
       m_fullscreenToggleRequested = true;
+    }
+    m_imguiCallback.specialKeyDown(key, mods, isRepeat);
   }
 
   void specialKeyUp(boo::ESpecialKey key, boo::EModifierKey mods) override {
@@ -178,12 +198,14 @@ struct WindowCallback : boo::IWindowCallback {
         as->specialKeyUp(key, mods);
       }
     }
+    m_imguiCallback.specialKeyUp(key, mods);
   }
 
   void destroyed() override { m_windowInvalid = true; }
 };
 
 struct Application : boo::IApplicationCallback {
+private:
   std::shared_ptr<boo::IWindow> m_window;
   WindowCallback m_windowCallback;
   hecl::Runtime::FileStoreManager& m_fileMgr;
@@ -201,6 +223,10 @@ struct Application : boo::IApplicationCallback {
   std::atomic_bool m_running = {true};
   bool m_noShaderWarmup = false;
 
+  bool m_firstFrame = true;
+  using delta_clock = std::chrono::high_resolution_clock;
+  std::chrono::time_point<delta_clock> m_prevFrameTime;
+
 public:
   Application(hecl::Runtime::FileStoreManager& fileMgr, hecl::CVarManager& cvarMgr, hecl::CVarCommons& cvarCmns)
   : m_fileMgr(fileMgr), m_cvarManager(cvarMgr), m_cvarCommons(cvarCmns) {}
@@ -216,12 +242,13 @@ public:
     m_window->showWindow();
 
     boo::SWindowRect rect = m_window->getWindowFrame();
-    m_window->getMainContextDataFactory()->commitTransaction([&](boo::IGraphicsDataFactory::Context& ctx) {
+    boo::IGraphicsDataFactory* gfxF = m_window->getMainContextDataFactory();
+    gfxF->commitTransaction([&](boo::IGraphicsDataFactory::Context& ctx) {
       m_renderTex = ctx.newRenderTexture(rect.size[0], rect.size[1], boo::TextureClampMode::ClampToEdge, 3, 3);
       return true;
     } BooTrace);
 
-    m_pipelineConv = hecl::NewPipelineConverter(m_window->getMainContextDataFactory());
+    m_pipelineConv = hecl::NewPipelineConverter(gfxF);
     hecl::conv = m_pipelineConv.get();
 
     m_voiceEngine = boo::NewAudioVoiceEngine();
@@ -258,6 +285,7 @@ public:
       onAppIdle();
     }
 
+    ImGuiEngine::Shutdown();
     if (m_window) {
       m_window->getCommandQueue()->stopRenderer();
     }
@@ -329,29 +357,60 @@ public:
       m_windowCallback.m_fullscreenToggleRequested = false;
     }
 
+    boo::IGraphicsDataFactory* gfxF = m_window->getMainContextDataFactory();
     if (!g_mainMP1) {
-      g_mainMP1.emplace(nullptr, nullptr, m_window->getMainContextDataFactory(), gfxQ, m_renderTex.get());
+      g_mainMP1.emplace(nullptr, nullptr, gfxF, gfxQ, m_renderTex.get());
       g_mainMP1->Init(m_fileMgr, &m_cvarManager, m_window.get(), m_voiceEngine.get(), *m_amuseAllocWrapper);
       if (!m_noShaderWarmup) {
         g_mainMP1->WarmupShaders();
       }
+      ImGuiEngine::Initialize(gfxF, m_window->getWindowFrame());
     }
 
-    if (g_mainMP1->Proc()) {
+    float dt = 1 / 60.f;
+    float realDt = dt;
+    auto now = delta_clock::now();
+    if (m_firstFrame) {
+      m_firstFrame = false;
+    } else {
+      using delta_duration = std::chrono::duration<float, std::ratio<1>>;
+      realDt = std::chrono::duration_cast<delta_duration>(now - m_prevFrameTime).count();
+      if (m_cvarCommons.m_variableDt->toBoolean()) {
+        dt = std::min(realDt, 1 / 30.f);
+      }
+    }
+    m_prevFrameTime = now;
+
+    ImGuiEngine::Begin(realDt);
+
+    if (g_mainMP1->Proc(dt)) {
       m_running.store(false);
       return;
     }
 
-    gfxQ->setRenderTarget(m_renderTex);
     {
       OPTICK_EVENT("Draw");
-      if (g_Renderer)
+      gfxQ->setRenderTarget(m_renderTex);
+      if (g_Renderer != nullptr) {
         g_Renderer->BeginScene();
+      }
       g_mainMP1->Draw();
-      if (g_Renderer)
+      if (g_Renderer != nullptr) {
         g_Renderer->EndScene();
+      }
+    }
+
+    {
+      OPTICK_EVENT("ImGui Draw");
+      ImGuiEngine::End();
+      ImGuiEngine::Draw(gfxQ);
+    }
+
+    {
+      OPTICK_EVENT("Execute");
       gfxQ->execute();
     }
+
     gfxQ->resolveDisplay(m_renderTex);
 
     if (g_ResFactory != nullptr) {
@@ -380,7 +439,9 @@ public:
 
   [[nodiscard]] bool getDeepColor() const { return m_cvarCommons.getDeepColor(); }
 
-  [[nodiscard]] int64_t getTargetFrameTime() const { return m_cvarCommons.getVariableFrameTime() ? 0 : 1000000000L / 60; }
+  [[nodiscard]] int64_t getTargetFrameTime() const {
+    return m_cvarCommons.getVariableFrameTime() ? 0 : 1000000000L / 60;
+  }
 };
 
 } // namespace metaforce

Runtime/CMakeLists.txt

@@ -201,7 +201,7 @@ elseif(UNIX)
 endif()
 
 add_executable(metaforce CMain.cpp ${PLAT_SRCS})
-target_link_libraries(metaforce PUBLIC RuntimeCommon ${PLAT_LIBS})
+target_link_libraries(metaforce PUBLIC RuntimeCommon ${PLAT_LIBS} imgui)
 
 if(COMMAND add_sanitizers)
   add_sanitizers(metaforce)

Runtime/IMain.hpp

@@ -36,7 +36,7 @@ public:
   virtual void Init(const hecl::Runtime::FileStoreManager& storeMgr, hecl::CVarManager* cvarMgr, boo::IWindow* window,
                     boo::IAudioVoiceEngine* voiceEngine, amuse::IBackendVoiceAllocator& backend) = 0;
   virtual void Draw() = 0;
-  virtual bool Proc() = 0;
+  virtual bool Proc(float dt) = 0;
   virtual void Shutdown() = 0;
   virtual boo::IWindow* GetMainWindow() const = 0;
   virtual EFlowState GetFlowState() const = 0;

Runtime/MP1/MP1.cpp

@@ -897,7 +897,7 @@ void CMain::WarmupShaders() {
   WarmupLog.report(logvisor::Info, FMT_STRING("Began warmup of {} objects"), m_warmupTags.size());
 }
 
-bool CMain::Proc() {
+bool CMain::Proc(float dt) {
   CRandom16::ResetNumNextCalls();
   // Warmup cycle overrides update
   if (m_warmupTags.size())
@@ -907,18 +907,6 @@ bool CMain::Proc() {
     m_loadedPersistentResources = true;
   }
 
-  float dt = 1 / 60.f;
-  if (m_cvarCommons->m_variableDt->toBoolean()) {
-    auto now = delta_clock::now();
-    if (m_firstFrame) {
-      m_firstFrame = false;
-    } else {
-      using delta_duration = std::chrono::duration<float, std::ratio<1>>;
-      dt = std::min(std::chrono::duration_cast<delta_duration>(now - m_prevFrameTime).count(), 1 / 30.f);
-    }
-    m_prevFrameTime = now;
-  }
-
   m_console->proc();
   if (!m_console->isOpen()) {
     CGBASupport::GlobalPoll();

Runtime/MP1/MP1.hpp

@@ -253,10 +253,6 @@ private:
   bool m_needsWarmupClear = false;
   bool m_loadedPersistentResources = false;
   bool m_doQuit = false;
-
-  bool m_firstFrame = true;
-  using delta_clock = std::chrono::high_resolution_clock;
-  std::chrono::time_point<delta_clock> m_prevFrameTime;
   DataSpec::MetaforceVersionInfo m_version;
 
   void InitializeSubsystems();
@@ -286,7 +282,7 @@ public:
   void Init(const hecl::Runtime::FileStoreManager& storeMgr, hecl::CVarManager* cvarManager, boo::IWindow* window,
             boo::IAudioVoiceEngine* voiceEngine, amuse::IBackendVoiceAllocator& backend) override;
   void WarmupShaders() override;
-  bool Proc() override;
+  bool Proc(float dt) override;
   void Draw() override;
   void Shutdown() override;
   boo::IWindow* GetMainWindow() const override;

extern/boo

@@ -1 +1 @@
-Subproject commit 55deba091336b787d405a8747bff9757713e7960
+Subproject commit d13fbda0c0ef0a832ed31ab4a7e91a23c6167f52

hecl/lib/CMakeLists.txt

@@ -40,6 +40,7 @@ set(HECL_HEADERS
     ../include/hecl/MathExtras.hpp
     ../include/hecl/UniformBufferPool.hpp
     ../include/hecl/VertexBufferPool.hpp
+    ../include/hecl/IndexBufferPool.hpp
     ../include/hecl/PipelineBase.hpp
     ../include/hecl/Pipeline.hpp
     ../include/hecl/Compilers.hpp)

hecl/shaderc/shaderc.cpp

@@ -537,6 +537,9 @@ bool Compiler::compileFile(SystemStringView file, std::string_view baseName,
     fmt::print(out.second, FMT_STRING("static const boo::VertexElementDescriptor {}_vtxfmtelems[] = {{\n"), shaderName);
     for (const auto& attr : shaderAttributes) {
       switch (attr.first & boo::VertexSemantic::SemanticMask) {
+      case boo::VertexSemantic::Position2:
+        SemanticOut(out.second, attr, FMT_STRING("{{boo::VertexSemantic::Position2{}, {}}},\n"));
+        break;
       case boo::VertexSemantic::Position3:
         SemanticOut(out.second, attr, FMT_STRING("{{boo::VertexSemantic::Position3{}, {}}},\n"));
         break;
@@ -611,7 +614,9 @@ bool Compiler::compileFile(SystemStringView file, std::string_view baseName,
     boo::VertexSemantic orsem = inst ? boo::VertexSemantic::Instanced : boo::VertexSemantic::None;
     int idxNum = int(strtoul(idx.c_str(), nullptr, 10));
     std::transform(semantic.begin(), semantic.end(), semantic.begin(), ::tolower);
-    if (semantic == "position3")
+    if (semantic == "position2")
+      shaderAttributes.push_back(std::make_pair(boo::VertexSemantic::Position2 | orsem, idxNum));
+    else  if (semantic == "position3")
       shaderAttributes.push_back(std::make_pair(boo::VertexSemantic::Position3 | orsem, idxNum));
     else if (semantic == "position4")
       shaderAttributes.push_back(std::make_pair(boo::VertexSemantic::Position4 | orsem, idxNum));

imgui/CMakeLists.txt

@@ -0,0 +1,16 @@
+add_library(imgui
+        ../extern/imgui/imgui.cpp
+        ../extern/imgui/imgui_demo.cpp
+        ../extern/imgui/imgui_draw.cpp
+        ../extern/imgui/imgui_tables.cpp
+        ../extern/imgui/imgui_widgets.cpp
+        ../extern/imgui/backends/imgui_impl_vulkan.cpp
+        ImGuiEngine.cpp
+        ImGuiEngine.hpp
+        )
+target_include_directories(imgui PUBLIC ../extern/imgui ${CMAKE_CURRENT_SOURCE_DIR})
+target_compile_definitions(imgui PUBLIC IMGUI_USER_CONFIG="imconfig_user.h")
+target_link_libraries(imgui PRIVATE boo hecl-light RetroDataSpec)
+
+add_shader(ImguiShader)
+target_link_libraries(shader_ImguiShader PRIVATE hecl-light)

imgui/ImGuiEngine.cpp

@@ -0,0 +1,286 @@
+#include "ImGuiEngine.hpp"
+
+#include "hecl/Pipeline.hpp"
+#include "hecl/VertexBufferPool.hpp"
+
+#include <zeus/CMatrix4f.hpp>
+
+namespace metaforce {
+static logvisor::Module Log{"ImGuiEngine"};
+
+struct ImGuiEngine::Input ImGuiEngine::Input;
+
+static boo::IGraphicsDataFactory* m_factory;
+static boo::ObjToken<boo::IShaderPipeline> ShaderPipeline;
+static boo::ObjToken<boo::IGraphicsBufferD> VertexBuffer;
+static boo::ObjToken<boo::IGraphicsBufferD> IndexBuffer;
+static boo::ObjToken<boo::IGraphicsBufferD> UniformBuffer;
+static boo::ObjToken<boo::IShaderDataBinding> ShaderDataBinding;
+static boo::ObjToken<boo::ITextureS> ImGuiAtlas;
+static boo::SWindowRect WindowRect;
+
+struct Uniform {
+  zeus::CMatrix4f xf;
+};
+
+static size_t VertexBufferSize = 5000;
+static size_t IndexBufferSize = 5000;
+
+void ImGuiEngine::Initialize(boo::IGraphicsDataFactory* factory, const boo::SWindowRect& rect) {
+  m_factory = factory;
+  WindowRect = rect;
+
+  ImGui::CreateContext();
+  ImGuiIO& io = ImGui::GetIO();
+  io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;
+  io.KeyMap[ImGuiKey_Tab] = 256 + static_cast<int>(boo::ESpecialKey::Tab);
+  io.KeyMap[ImGuiKey_LeftArrow] = 256 + static_cast<int>(boo::ESpecialKey::Left);
+  io.KeyMap[ImGuiKey_RightArrow] = 256 + static_cast<int>(boo::ESpecialKey::Right);
+  io.KeyMap[ImGuiKey_UpArrow] = 256 + static_cast<int>(boo::ESpecialKey::Up);
+  io.KeyMap[ImGuiKey_DownArrow] = 256 + static_cast<int>(boo::ESpecialKey::Down);
+  io.KeyMap[ImGuiKey_PageUp] = 256 + static_cast<int>(boo::ESpecialKey::PgUp);
+  io.KeyMap[ImGuiKey_PageDown] = 256 + static_cast<int>(boo::ESpecialKey::PgDown);
+  io.KeyMap[ImGuiKey_Home] = 256 + static_cast<int>(boo::ESpecialKey::Home);
+  io.KeyMap[ImGuiKey_End] = 256 + static_cast<int>(boo::ESpecialKey::End);
+  io.KeyMap[ImGuiKey_Insert] = 256 + static_cast<int>(boo::ESpecialKey::Insert);
+  io.KeyMap[ImGuiKey_Delete] = 256 + static_cast<int>(boo::ESpecialKey::Delete);
+  io.KeyMap[ImGuiKey_Backspace] = 256 + static_cast<int>(boo::ESpecialKey::Backspace);
+  io.KeyMap[ImGuiKey_Space] = ' ';
+  io.KeyMap[ImGuiKey_Enter] = 256 + static_cast<int>(boo::ESpecialKey::Enter);
+  io.KeyMap[ImGuiKey_Escape] = 256 + static_cast<int>(boo::ESpecialKey::Esc);
+  io.KeyMap[ImGuiKey_A] = 'A'; // for text edit CTRL+A: select all
+  io.KeyMap[ImGuiKey_C] = 'C'; // for text edit CTRL+C: copy
+  io.KeyMap[ImGuiKey_V] = 'V'; // for text edit CTRL+V: paste
+  io.KeyMap[ImGuiKey_X] = 'X'; // for text edit CTRL+X: cut
+  io.KeyMap[ImGuiKey_Y] = 'Y'; // for text edit CTRL+Y: redo
+  io.KeyMap[ImGuiKey_Z] = 'Z'; // for text edit CTRL+Z: undo
+
+  int width = 0;
+  int height = 0;
+  unsigned char* pixels = nullptr;
+  io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
+  factory->commitTransaction([&](boo::IGraphicsDataFactory::Context& ctx) {
+    ShaderPipeline = hecl::conv->convert(Shader_ImguiShader{});
+    ImGuiAtlas = ctx.newStaticTexture(width, height, 1, boo::TextureFormat::RGBA8, boo::TextureClampMode::ClampToEdge,
+                                      pixels, width * height * 4);
+    VertexBuffer = ctx.newDynamicBuffer(boo::BufferUse::Vertex, sizeof(ImDrawVert), VertexBufferSize);
+    IndexBuffer = ctx.newDynamicBuffer(boo::BufferUse::Index, sizeof(ImDrawIdx), IndexBufferSize);
+    UniformBuffer = ctx.newDynamicBuffer(boo::BufferUse::Uniform, sizeof(Uniform), 1);
+    BuildShaderDataBinding(ctx);
+    return true;
+  } BooTrace);
+  io.Fonts->SetTexID(ImGuiAtlas.get());
+}
+
+void ImGuiEngine::Shutdown() {
+  ImGui::DestroyContext();
+  ShaderPipeline.reset();
+}
+
+void ImGuiEngine::Begin(float dt) {
+  ImGuiIO& io = ImGui::GetIO();
+  io.DeltaTime = dt;
+  io.DisplaySize.x = WindowRect.size[0];
+  io.DisplaySize.y = WindowRect.size[1];
+  // TODO
+  //  io.DisplayFramebufferScale = ImVec2{1.f, 1.f};
+  if (Input.m_mouseIn) {
+    io.MousePos = ImVec2{static_cast<float>(Input.m_mousePos.pixel[0]),
+                         static_cast<float>(WindowRect.size[1] - Input.m_mousePos.pixel[1])};
+  } else {
+    io.MousePos = ImVec2{-FLT_MAX, -FLT_MAX};
+  }
+  memcpy(io.MouseDown, Input.m_mouseButtons.data(), sizeof(io.MouseDown));
+  io.MouseWheel = static_cast<float>(Input.m_scrollDelta.delta[1]);
+  io.MouseWheelH = static_cast<float>(Input.m_scrollDelta.delta[0]);
+  Input.m_scrollDelta.zeroOut();
+  io.KeyCtrl = True(Input.m_modifiers & boo::EModifierKey::Ctrl);
+  io.KeyShift = True(Input.m_modifiers & boo::EModifierKey::Shift);
+  io.KeyAlt = True(Input.m_modifiers & boo::EModifierKey::Alt);
+  io.KeySuper = True(Input.m_modifiers & boo::EModifierKey::Command);
+  memcpy(io.KeysDown, Input.m_keys.data(), sizeof(io.KeysDown));
+
+  for (const auto c : ImGuiEngine::Input.m_charCodes) {
+    io.AddInputCharacter(c);
+  }
+  ImGuiEngine::Input.m_charCodes.clear();
+
+  ImGuiWindowCallback::m_mouseCaptured = io.WantCaptureMouse;
+  ImGuiWindowCallback::m_keyboardCaptured = io.WantCaptureKeyboard;
+
+  ImGui::NewFrame();
+  ImGui::ShowDemoWindow();
+}
+
+void ImGuiEngine::End() {
+  ImGui::EndFrame();
+  ImGui::Render();
+  ImDrawData* drawData = ImGui::GetDrawData();
+
+  float L = drawData->DisplayPos.x;
+  float R = drawData->DisplayPos.x + drawData->DisplaySize.x;
+  float T = drawData->DisplayPos.y;
+  float B = drawData->DisplayPos.y + drawData->DisplaySize.y;
+  float N = 0.f;
+  float F = 1.f;
+  zeus::CMatrix4f projXf = zeus::CMatrix4f{
+      zeus::CVector4f{2.0f / (R - L), 0.0f, 0.0f, 0.0f},
+      zeus::CVector4f{0.0f, 2.0f / (T - B), 0.0f, 0.0f},
+      zeus::CVector4f{0.0f, 0.0f, 1 / (F - N), 0.0f},
+      zeus::CVector4f{(R + L) / (L - R), (T + B) / (B - T), N / (F - N), 1.0f},
+  };
+
+  m_factory->commitTransaction([&](boo::IGraphicsDataFactory::Context& ctx) {
+    bool rebind = false;
+    if (drawData->TotalIdxCount > IndexBufferSize) {
+      Log.report(logvisor::Info, FMT_STRING(_SYS_STR("Resizing index buffer from {} to {}")), IndexBufferSize,
+                 drawData->TotalIdxCount);
+      IndexBuffer = ctx.newDynamicBuffer(boo::BufferUse::Index, sizeof(ImDrawIdx), drawData->TotalIdxCount);
+      IndexBufferSize = drawData->TotalIdxCount;
+      rebind = true;
+    }
+    if (drawData->TotalVtxCount > VertexBufferSize) {
+      Log.report(logvisor::Info, FMT_STRING(_SYS_STR("Resizing vertex buffer from {} to {}")), VertexBufferSize,
+                 drawData->TotalVtxCount);
+      VertexBuffer = ctx.newDynamicBuffer(boo::BufferUse::Vertex, sizeof(ImDrawVert), drawData->TotalVtxCount);
+      VertexBufferSize = drawData->TotalVtxCount;
+      rebind = true;
+    }
+    if (rebind) {
+      BuildShaderDataBinding(ctx);
+    }
+
+    UniformBuffer->load(&projXf, sizeof(Uniform));
+    auto* vtxBuf = static_cast<ImDrawVert*>(VertexBuffer->map(drawData->TotalVtxCount * sizeof(ImDrawVert)));
+    auto* idxBuf = static_cast<ImDrawIdx*>(IndexBuffer->map(drawData->TotalIdxCount * sizeof(ImDrawIdx)));
+
+    for (int i = 0; i < drawData->CmdListsCount; ++i) {
+      const auto* cmdList = drawData->CmdLists[i];
+      int vtxBufferSz = cmdList->VtxBuffer.size();
+      int idxBufferSz = cmdList->IdxBuffer.size();
+      memcpy(vtxBuf, cmdList->VtxBuffer.begin(), vtxBufferSz * sizeof(ImDrawVert));
+      memcpy(idxBuf, cmdList->IdxBuffer.begin(), idxBufferSz * sizeof(ImDrawIdx));
+      vtxBuf += vtxBufferSz;
+      idxBuf += idxBufferSz;
+    }
+
+    VertexBuffer->unmap();
+    IndexBuffer->unmap();
+    return true;
+  } BooTrace);
+}
+
+void ImGuiEngine::Draw(boo::IGraphicsCommandQueue* gfxQ) {
+  ImDrawData* drawData = ImGui::GetDrawData();
+
+  gfxQ->setShaderDataBinding(ShaderDataBinding);
+
+  boo::SWindowRect viewportRect = WindowRect;
+  int viewportHeight = viewportRect.size[1];
+  viewportRect.location = {0, 0};
+  if (m_factory->platform() == boo::IGraphicsDataFactory::Platform::Vulkan) {
+    viewportRect.location[1] = viewportHeight;
+    viewportRect.size[1] = -viewportHeight;
+  }
+  gfxQ->setViewport(viewportRect);
+
+  size_t idxOffset = 0;
+  size_t vtxOffset = 0;
+  for (int i = 0; i < drawData->CmdListsCount; ++i) {
+    const auto* cmdList = drawData->CmdLists[i];
+    for (const auto& drawCmd : cmdList->CmdBuffer) {
+      if (drawCmd.UserCallback != nullptr) {
+        drawCmd.UserCallback(cmdList, &drawCmd);
+        continue;
+      }
+      ImVec2 pos = drawData->DisplayPos;
+      int clipX = static_cast<int>(drawCmd.ClipRect.x - pos.x);
+      int clipY = static_cast<int>(drawCmd.ClipRect.y - pos.y);
+      int clipW = static_cast<int>(drawCmd.ClipRect.z - pos.x) - clipX;
+      int clipH = static_cast<int>(drawCmd.ClipRect.w - pos.y) - clipY;
+      boo::SWindowRect clipRect{clipX, clipY, clipW, clipH};
+      if (m_factory->platform() == boo::IGraphicsDataFactory::Platform::Vulkan) {
+        clipRect.location[1] = viewportHeight - clipRect.location[1] - clipRect.size[1];
+      }
+      gfxQ->setScissor(clipRect);
+      gfxQ->drawIndexed(idxOffset + drawCmd.IdxOffset, drawCmd.ElemCount, vtxOffset + drawCmd.VtxOffset);
+    }
+    idxOffset += cmdList->IdxBuffer.size();
+    vtxOffset += cmdList->VtxBuffer.size();
+  }
+}
+
+void ImGuiEngine::BuildShaderDataBinding(boo::IGraphicsDataFactory::Context& ctx) {
+  boo::ObjToken<boo::IGraphicsBuffer> uniforms[] = {UniformBuffer.get()};
+  boo::PipelineStage unistages[] = {boo::PipelineStage::Vertex};
+  size_t unioffs[] = {0};
+  size_t unisizes[] = {sizeof(Uniform)};
+  boo::ObjToken<boo::ITexture> texs[] = {ImGuiAtlas.get()};
+  ShaderDataBinding = ctx.newShaderDataBinding(ShaderPipeline, VertexBuffer.get(), nullptr, IndexBuffer.get(), 1,
+                                               uniforms, unistages, unioffs, unisizes, 1, texs, nullptr, nullptr);
+}
+
+bool ImGuiWindowCallback::m_mouseCaptured = false;
+bool ImGuiWindowCallback::m_keyboardCaptured = false;
+
+void ImGuiWindowCallback::mouseDown(const boo::SWindowCoord& coord, boo::EMouseButton button, boo::EModifierKey mods) {
+  ImGuiEngine::Input.m_mousePos = coord;
+  if (button != boo::EMouseButton::None) {
+    ImGuiEngine::Input.m_mouseButtons[static_cast<size_t>(button) - 1] = true;
+  }
+  ImGuiEngine::Input.m_modifiers = mods;
+}
+
+void ImGuiWindowCallback::mouseUp(const boo::SWindowCoord& coord, boo::EMouseButton button, boo::EModifierKey mods) {
+  ImGuiEngine::Input.m_mousePos = coord;
+  if (button != boo::EMouseButton::None) {
+    ImGuiEngine::Input.m_mouseButtons[static_cast<size_t>(button) - 1] = false;
+  }
+  ImGuiEngine::Input.m_modifiers = mods;
+}
+
+void ImGuiWindowCallback::mouseMove(const boo::SWindowCoord& coord) { ImGuiEngine::Input.m_mousePos = coord; }
+
+void ImGuiWindowCallback::mouseEnter(const boo::SWindowCoord& coord) {
+  ImGuiEngine::Input.m_mouseIn = true;
+  ImGuiEngine::Input.m_mousePos = coord;
+}
+
+void ImGuiWindowCallback::mouseLeave(const boo::SWindowCoord& coord) {
+  ImGuiEngine::Input.m_mouseIn = false;
+  ImGuiEngine::Input.m_mousePos = coord;
+}
+
+void ImGuiWindowCallback::scroll(const boo::SWindowCoord& coord, const boo::SScrollDelta& scroll) {
+  ImGuiEngine::Input.m_mousePos = coord;
+  ImGuiEngine::Input.m_scrollDelta += scroll;
+}
+
+void ImGuiWindowCallback::charKeyDown(unsigned long charCode, boo::EModifierKey mods, bool isRepeat) {
+  if (charCode < 256) {
+    ImGuiEngine::Input.m_keys[charCode] = true;
+  }
+  ImGuiEngine::Input.m_charCodes.push_back(charCode);
+  ImGuiEngine::Input.m_modifiers = mods;
+}
+
+void ImGuiWindowCallback::charKeyUp(unsigned long charCode, boo::EModifierKey mods) {
+  if (charCode < 256) {
+    ImGuiEngine::Input.m_keys[charCode] = false;
+  }
+  ImGuiEngine::Input.m_modifiers = mods;
+}
+
+void ImGuiWindowCallback::specialKeyDown(boo::ESpecialKey key, boo::EModifierKey mods, bool isRepeat) {
+  ImGuiEngine::Input.m_keys[256 + static_cast<int>(key)] = true;
+  ImGuiEngine::Input.m_modifiers = mods;
+}
+
+void ImGuiWindowCallback::specialKeyUp(boo::ESpecialKey key, boo::EModifierKey mods) {
+  ImGuiEngine::Input.m_keys[256 + static_cast<int>(key)] = false;
+  ImGuiEngine::Input.m_modifiers = mods;
+}
+
+void ImGuiWindowCallback::resized(const boo::SWindowRect& rect, bool sync) { WindowRect = rect; }
+
+} // namespace metaforce

imgui/ImGuiEngine.hpp

@@ -0,0 +1,48 @@
+#pragma once
+
+#include "imgui.h"
+
+#include <boo/IWindow.hpp>
+#include <boo/graphicsdev/IGraphicsDataFactory.hpp>
+
+namespace metaforce {
+class ImGuiEngine {
+public:
+  static struct Input {
+    boo::SWindowCoord m_mousePos{};
+    std::array<bool, 5> m_mouseButtons{};
+    boo::SScrollDelta m_scrollDelta{};
+    boo::EModifierKey m_modifiers{};
+    std::array<bool, 512> m_keys{};
+    std::vector<unsigned long> m_charCodes{};
+    bool m_mouseIn = true;
+  } Input;
+
+  static void Initialize(boo::IGraphicsDataFactory* factory, const boo::SWindowRect &rect);
+  static void Shutdown();
+
+  static void Begin(float dt);
+  static void End();
+  static void Draw(boo::IGraphicsCommandQueue* gfxQ);
+
+private:
+  static void BuildShaderDataBinding(boo::IGraphicsDataFactory::Context& ctx);
+};
+
+struct ImGuiWindowCallback : boo::IWindowCallback {
+  static bool m_mouseCaptured;
+  static bool m_keyboardCaptured;
+
+  void mouseDown(const boo::SWindowCoord& coord, boo::EMouseButton button, boo::EModifierKey mods) override;
+  void mouseUp(const boo::SWindowCoord& coord, boo::EMouseButton button, boo::EModifierKey mods) override;
+  void mouseMove(const boo::SWindowCoord& coord) override;
+  void mouseEnter(const boo::SWindowCoord& coord) override;
+  void mouseLeave(const boo::SWindowCoord& coord) override;
+  void scroll(const boo::SWindowCoord& coord, const boo::SScrollDelta& scroll) override;
+  void charKeyDown(unsigned long charCode, boo::EModifierKey mods, bool isRepeat) override;
+  void charKeyUp(unsigned long charCode, boo::EModifierKey mods) override;
+  void specialKeyDown(boo::ESpecialKey key, boo::EModifierKey mods, bool isRepeat) override;
+  void specialKeyUp(boo::ESpecialKey key, boo::EModifierKey mods) override;
+  void resized(const boo::SWindowRect &rect, bool sync) override;
+};
+} // namespace metaforce

imgui/ImguiShader.shader

@@ -0,0 +1,134 @@
+#shader ImguiShader
+#attribute position2
+#attribute uv2
+#attribute colorunorm
+#srcfac srcalpha
+#dstfac invsrcalpha
+#primitive triangles
+#depthtest none
+#depthwrite false
+#culling none
+
+
+#vertex glsl
+layout (location = 0) in vec2 pos;
+layout (location = 1) in vec2 uv;
+layout (location = 2) in vec4 color;
+UBINDING0 uniform ImguiShaderUniform
+{
+    mat4 xf;
+};
+struct VertToFrag
+{
+    vec2 uv;
+    vec4 color;
+};
+
+SBINDING(0) out VertToFrag vtf;
+void main()
+{
+    vtf.uv = uv;
+    vtf.color = color;
+    gl_Position = xf * vec4(pos.xy,0,1);
+}
+
+#fragment glsl
+struct VertToFrag
+{
+    vec2 uv;
+    vec4 color;
+};
+
+SBINDING(0) in VertToFrag vtf;
+layout (location = 0) out vec4 colorOut;
+TBINDING0 uniform sampler2D tex;
+void main()
+{
+    colorOut = vtf.color * texture(tex, vtf.uv.st);
+}
+
+
+#vertex hlsl
+cbuffer ImguiShaderUniform : register(b0)
+{
+  float4x4 xf;
+};
+
+struct VertData
+{
+    float2 pos : POSITION;
+    float2 uv  : TEXCOORD0;
+    float4 col : COLOR0;
+};
+
+struct VertToFrag
+{
+  float4 pos : SV_POSITION;
+  float2 uv  : TEXCOORD0;
+  float4 col : COLOR0;
+};
+
+VertToFrag main(in VS_INPUT v)
+{
+    VertToFrag vtf;
+    vtf.pos = mul(xf, float4(v.pos.xy, 0.f, 1.f));
+    vtf.col = v.col;
+    vtf.uv  = v.uv;
+    return vtf;
+}
+
+#fragment hlsl
+struct VertToFrag
+{
+    float4 pos : SV_POSITION;
+    float2 uv  : TEXCOORD0;
+    float4 col : COLOR0;
+};
+SamplerState samp : register(s0);
+Texture2D tex0 : register(t0);
+
+float4 main(in VertToFrag vtf) : SV_Target0
+{
+    return vtf.col * tex0.Sample(samp, vtf.uv);
+}
+
+
+#vertex metal
+struct ImguiShaderUniform {
+    float4x4 xf;
+};
+
+struct VertexIn {
+    float2 position  [[attribute(0)]];
+    float2 texCoords [[attribute(1)]];
+    uchar4 color     [[attribute(2)]];
+};
+
+struct VertToFrag {
+    float4 position [[position]];
+    float2 texCoords;
+    float4 color;
+};
+
+vertex VertToFrag vmain(VertexIn v [[stage_in]],
+                        constant ImguiShaderUniform& u [[buffer(2)]]) {
+    VertToFrag vtf;
+    vtf.position = u.xf * float4(v.position, 0, 1);
+    vtf.texCoords = v.texCoords;
+    vtf.color = float4(v.color) / float4(255.0);
+    return vtf;
+}
+
+#fragment metal
+struct VertToFrag {
+    float4 position [[position]];
+    float2 texCoords;
+    float4 color;
+};
+
+fragment half4 fmain(VertToFrag vtf [[stage_in]],
+                     texture2d<half, access::sample> tex [[texture(0)]]) {
+    constexpr sampler linearSampler(coord::normalized, min_filter::linear, mag_filter::linear, mip_filter::linear);
+    half4 texColor = tex.sample(linearSampler, vtf.texCoords);
+    return half4(vtf.color) * texColor;
+}

imgui/imconfig_user.h

@@ -0,0 +1,6 @@
+#include <cstdint>
+
+#define IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+
+// Use 32-bit index type for boo
+#define ImDrawIdx uint32_t