Renderer: Use imgui for drawing debug text and OSD

12 files changed, 269 insertions, 323 deletions

diff --git a/Source/Core/DolphinQt/HotkeyScheduler.cpp b/Source/Core/DolphinQt/HotkeyScheduler.cpp
index cd5c51822f..7cab2eb8a7 100644
--- a/Source/Core/DolphinQt/HotkeyScheduler.cpp
+++ b/Source/Core/DolphinQt/HotkeyScheduler.cpp
@@ -5,6 +5,7 @@
 #include "DolphinQt/HotkeyScheduler.h"
 
 #include <algorithm>
+#include <cmath>
 #include <thread>
 
 #include <QCoreApplication>
@@ -26,6 +27,7 @@
 
 #include "InputCommon/ControllerInterface/ControllerInterface.h"
 
+#include "VideoCommon/OnScreenDisplay.h"
 #include "VideoCommon/RenderBase.h"
 #include "VideoCommon/VertexShaderManager.h"
 #include "VideoCommon/VideoConfig.h"
@@ -286,43 +288,62 @@ void HotkeyScheduler::Run()
       else if (IsHotkey(HK_NEXT_GAME_WIIMOTE_PROFILE_4))
         m_profile_cycler.NextWiimoteProfileForGame(3);
 
-      const auto show_msg = [](OSDMessage message) {
-        if (g_renderer)
-          g_renderer->ShowOSDMessage(message);
+      auto ShowVolume = []() {
+        OSD::AddMessage(std::string("Volume: ") +
+                        (SConfig::GetInstance().m_IsMuted ?
+                             "Muted" :
+                             std::to_string(SConfig::GetInstance().m_Volume)) +
+                        "%");
       };
 
       // Volume
       if (IsHotkey(HK_VOLUME_DOWN))
       {
-        show_msg(OSDMessage::VolumeChanged);
         settings.DecreaseVolume(3);
+        ShowVolume();
       }
 
       if (IsHotkey(HK_VOLUME_UP))
       {
-        show_msg(OSDMessage::VolumeChanged);
         settings.IncreaseVolume(3);
+        ShowVolume();
       }
 
       if (IsHotkey(HK_VOLUME_TOGGLE_MUTE))
       {
-        show_msg(OSDMessage::VolumeChanged);
         AudioCommon::ToggleMuteVolume();
+        ShowVolume();
       }
 
       // Graphics
       const auto efb_scale = Config::Get(Config::GFX_EFB_SCALE);
+      auto ShowEFBScale = []() {
+        switch (Config::Get(Config::GFX_EFB_SCALE))
+        {
+        case EFB_SCALE_AUTO_INTEGRAL:
+          OSD::AddMessage("Internal Resolution: Auto (integral)");
+          break;
+        case 1:
+          OSD::AddMessage("Internal Resolution: Native");
+          break;
+        default:
+          OSD::AddMessage("Internal Resolution: %dx", g_Config.iEFBScale);
+          break;
+        }
+      };
 
       if (IsHotkey(HK_INCREASE_IR))
       {
-        show_msg(OSDMessage::IRChanged);
         Config::SetCurrent(Config::GFX_EFB_SCALE, efb_scale + 1);
+        ShowEFBScale();
       }
       if (IsHotkey(HK_DECREASE_IR))
       {
-        show_msg(OSDMessage::IRChanged);
         if (efb_scale > EFB_SCALE_AUTO_INTEGRAL)
+        {
           Config::SetCurrent(Config::GFX_EFB_SCALE, efb_scale - 1);
+          ShowEFBScale();
+        }
       }
 
       if (IsHotkey(HK_TOGGLE_CROP))
@@ -330,34 +351,55 @@ void HotkeyScheduler::Run()
 
       if (IsHotkey(HK_TOGGLE_AR))
       {
-        show_msg(OSDMessage::ARToggled);
         const int aspect_ratio = (static_cast<int>(Config::Get(Config::GFX_ASPECT_RATIO)) + 1) & 3;
         Config::SetCurrent(Config::GFX_ASPECT_RATIO, static_cast<AspectMode>(aspect_ratio));
+        switch (static_cast<AspectMode>(aspect_ratio))
+        {
+        case AspectMode::Stretch:
+          OSD::AddMessage("Stretch");
+          break;
+        case AspectMode::Analog:
+          OSD::AddMessage("Force 4:3");
+          break;
+        case AspectMode::AnalogWide:
+          OSD::AddMessage("Force 16:9");
+          break;
+        case AspectMode::Auto:
+        default:
+          OSD::AddMessage("Auto");
+          break;
+        }
       }
       if (IsHotkey(HK_TOGGLE_EFBCOPIES))
       {
-        show_msg(OSDMessage::EFBCopyToggled);
-        Config::SetCurrent(Config::GFX_HACK_SKIP_EFB_COPY_TO_RAM,
-                           !Config::Get(Config::GFX_HACK_SKIP_EFB_COPY_TO_RAM));
+        const bool new_value = !Config::Get(Config::GFX_HACK_SKIP_EFB_COPY_TO_RAM);
+        Config::SetCurrent(Config::GFX_HACK_SKIP_EFB_COPY_TO_RAM, new_value);
+        OSD::AddMessage(StringFromFormat("Copy EFB: %s", new_value ? "to Texture" : "to RAM"));
       }
 
+      auto ShowXFBCopies = []() {
+        OSD::AddMessage(StringFromFormat(
+            "Copy XFB: %s%s", Config::Get(Config::GFX_HACK_IMMEDIATE_XFB) ? " (Immediate)" : "",
+            Config::Get(Config::GFX_HACK_SKIP_XFB_COPY_TO_RAM) ? "to Texture" : "to RAM"));
+      };
+
       if (IsHotkey(HK_TOGGLE_XFBCOPIES))
       {
-        show_msg(OSDMessage::XFBChanged);
         Config::SetCurrent(Config::GFX_HACK_SKIP_XFB_COPY_TO_RAM,
                            !Config::Get(Config::GFX_HACK_SKIP_XFB_COPY_TO_RAM));
+        ShowXFBCopies();
       }
       if (IsHotkey(HK_TOGGLE_IMMEDIATE_XFB))
       {
-        show_msg(OSDMessage::XFBChanged);
-
         Config::SetCurrent(Config::GFX_HACK_IMMEDIATE_XFB,
                            !Config::Get(Config::GFX_HACK_IMMEDIATE_XFB));
+        ShowXFBCopies();
       }
       if (IsHotkey(HK_TOGGLE_FOG))
       {
-        show_msg(OSDMessage::FogToggled);
-        Config::SetCurrent(Config::GFX_DISABLE_FOG, !Config::Get(Config::GFX_DISABLE_FOG));
+        const bool new_value = !Config::Get(Config::GFX_DISABLE_FOG);
+        Config::SetCurrent(Config::GFX_DISABLE_FOG, new_value);
+        OSD::AddMessage(StringFromFormat("Fog: %s", new_value ? "Enabled" : "Disabled"));
       }
 
       if (IsHotkey(HK_TOGGLE_DUMPTEXTURES))
@@ -368,22 +410,28 @@ void HotkeyScheduler::Run()
 
       Core::SetIsThrottlerTempDisabled(IsHotkey(HK_TOGGLE_THROTTLE, true));
 
+      auto ShowEmulationSpeed = []() {
+        OSD::AddMessage(
+            SConfig::GetInstance().m_EmulationSpeed <= 0 ?
+                "Speed Limit: Unlimited" :
+                StringFromFormat("Speed Limit: %li%%",
+                                 std::lround(SConfig::GetInstance().m_EmulationSpeed * 100.f)));
+      };
+
       if (IsHotkey(HK_DECREASE_EMULATION_SPEED))
       {
-        show_msg(OSDMessage::SpeedChanged);
-
         auto speed = SConfig::GetInstance().m_EmulationSpeed - 0.1;
         speed = (speed <= 0 || (speed >= 0.95 && speed <= 1.05)) ? 1.0 : speed;
         SConfig::GetInstance().m_EmulationSpeed = speed;
+        ShowEmulationSpeed();
       }
 
       if (IsHotkey(HK_INCREASE_EMULATION_SPEED))
       {
-        show_msg(OSDMessage::SpeedChanged);
-
         auto speed = SConfig::GetInstance().m_EmulationSpeed + 0.1;
         speed = (speed >= 0.95 && speed <= 1.05) ? 1.0 : speed;
         SConfig::GetInstance().m_EmulationSpeed = speed;
+        ShowEmulationSpeed();
       }
 
       // Slot Saving / Loading
diff --git a/Source/Core/VideoBackends/D3D/Render.cpp b/Source/Core/VideoBackends/D3D/Render.cpp
index 43dd44f60f..87190a6d2b 100644
--- a/Source/Core/VideoBackends/D3D/Render.cpp
+++ b/Source/Core/VideoBackends/D3D/Render.cpp
@@ -595,10 +595,6 @@ void Renderer::SwapImpl(AbstractTexture* texture, const EFBRectangle& xfb_region
   D3D11_VIEWPORT vp = CD3D11_VIEWPORT(0.0f, 0.0f, static_cast<float>(m_backbuffer_width),
                                       static_cast<float>(m_backbuffer_height));
   D3D::context->RSSetViewports(1, &vp);
-
-  Renderer::DrawDebugText();
-
-  OSD::DrawMessages();
   DrawImGui();
 
   g_texture_cache->Cleanup(frameCount);
diff --git a/Source/Core/VideoBackends/OGL/Render.cpp b/Source/Core/VideoBackends/OGL/Render.cpp
index e967ae6a75..c857cce083 100644
--- a/Source/Core/VideoBackends/OGL/Render.cpp
+++ b/Source/Core/VideoBackends/OGL/Render.cpp
@@ -1424,9 +1424,6 @@ void Renderer::SwapImpl(AbstractTexture* texture, const EFBRectangle& xfb_region
 
   ResetAPIState();
 
-  // Do our OSD callbacks
-  OSD::DoCallbacks(OSD::CallbackType::OnFrame);
-
   // Check if we need to render to a new surface.
   CheckForSurfaceChange();
   CheckForSurfaceResize();
@@ -1451,10 +1448,6 @@ void Renderer::SwapImpl(AbstractTexture* texture, const EFBRectangle& xfb_region
 
     // Render OSD messages.
     glViewport(0, 0, m_backbuffer_width, m_backbuffer_height);
-    glEnable(GL_BLEND);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-    DrawDebugText();
-    OSD::DrawMessages();
     DrawImGui();
 
     // Swap the back and front buffers, presenting the image.
diff --git a/Source/Core/VideoBackends/Software/SWRenderer.cpp b/Source/Core/VideoBackends/Software/SWRenderer.cpp
index 0b64022725..f8032f7e5d 100644
--- a/Source/Core/VideoBackends/Software/SWRenderer.cpp
+++ b/Source/Core/VideoBackends/Software/SWRenderer.cpp
@@ -97,13 +97,8 @@ std::unique_ptr<AbstractPipeline> SWRenderer::CreatePipeline(const AbstractPipel
 // Called on the GPU thread
 void SWRenderer::SwapImpl(AbstractTexture* texture, const EFBRectangle& xfb_region, u64 ticks)
 {
-  OSD::DoCallbacks(OSD::CallbackType::OnFrame);
-
   if (!IsHeadless())
-  {
-    DrawDebugText();
     m_window->ShowImage(texture, xfb_region);
-  }
 
   UpdateActiveConfig();
 }
diff --git a/Source/Core/VideoBackends/Vulkan/Renderer.cpp b/Source/Core/VideoBackends/Vulkan/Renderer.cpp
index 509269368d..5ae6093f24 100644
--- a/Source/Core/VideoBackends/Vulkan/Renderer.cpp
+++ b/Source/Core/VideoBackends/Vulkan/Renderer.cpp
@@ -704,9 +704,6 @@ void Renderer::DrawScreen(VKTexture* xfb_texture, const EFBRectangle& xfb_region
   // Draw OSD
   SetViewport(0.0f, 0.0f, static_cast<float>(backbuffer->GetWidth()),
               static_cast<float>(backbuffer->GetHeight()), 0.0f, 1.0f);
-  DrawDebugText();
-  OSD::DoCallbacks(OSD::CallbackType::OnFrame);
-  OSD::DrawMessages();
   StateTracker::GetInstance()->SetPendingRebind();
   DrawImGui();
 
diff --git a/Source/Core/VideoCommon/OnScreenDisplay.cpp b/Source/Core/VideoCommon/OnScreenDisplay.cpp
index 62997cd150..d6f9b38a3e 100644
--- a/Source/Core/VideoCommon/OnScreenDisplay.cpp
+++ b/Source/Core/VideoCommon/OnScreenDisplay.cpp
@@ -5,22 +5,79 @@
 #include <algorithm>
 #include <list>
 #include <map>
+#include <mutex>
 #include <string>
 
+#include "imgui.h"
+
 #include "Common/CommonTypes.h"
 #include "Common/Timer.h"
 
 #include "Core/ConfigManager.h"
 
 #include "VideoCommon/OnScreenDisplay.h"
-#include "VideoCommon/RenderBase.h"
 
 namespace OSD
 {
-static std::multimap<CallbackType, Callback> s_callbacks;
+constexpr float LEFT_MARGIN = 10.0f;    // Pixels to the left of OSD messages.
+constexpr float TOP_MARGIN = 10.0f;     // Pixels above the first OSD message.
+constexpr float WINDOW_PADDING = 4.0f;  // Pixels between subsequent OSD messages.
+
+struct Message
+{
+  Message() {}
+  Message(const std::string& text_, u32 timestamp_, u32 color_)
+      : text(text_), timestamp(timestamp_), color(color_)
+  {
+  }
+  std::string text;
+  u32 timestamp;
+  u32 color;
+};
 static std::multimap<MessageType, Message> s_messages;
 static std::mutex s_messages_mutex;
 
+static ImVec4 RGBAToImVec4(const u32 rgba)
+{
+  return ImVec4(static_cast<float>((rgba >> 16) & 0xFF) / 255.0f,
+                static_cast<float>((rgba >> 8) & 0xFF) / 255.0f,
+                static_cast<float>((rgba >> 0) & 0xFF) / 255.0f,
+                static_cast<float>((rgba >> 24) & 0xFF) / 255.0f);
+}
+
+static float DrawMessage(int index, const Message& msg, const ImVec2& position, int time_left)
+{
+  // We have to provide a window name, and these shouldn't be duplicated.
+  // So instead, we generate a name based on the number of messages drawn.
+  const std::string window_name = StringFromFormat("osd_%d", index);
+
+  // The size must be reset, otherwise the length of old messages could influence new ones.
+  ImGui::SetNextWindowPos(position);
+  ImGui::SetNextWindowSize(ImVec2(0.0f, 0.0f));
+
+  // Gradually fade old messages away.
+  const float alpha = std::min(1.0f, std::max(0.0f, time_left / 1024.0f));
+  ImGui::PushStyleVar(ImGuiStyleVar_Alpha, alpha);
+
+  float window_height = 0.0f;
+  if (ImGui::Begin(window_name.c_str(), nullptr,
+                   ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoInputs |
+                       ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoSavedSettings |
+                       ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoNav |
+                       ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoFocusOnAppearing))
+  {
+    // Use %s in case message contains %.
+    ImGui::TextColored(RGBAToImVec4(msg.color), "%s", msg.text.c_str());
+    window_height =
+        ImGui::GetWindowSize().y + (WINDOW_PADDING * ImGui::GetIO().DisplayFramebufferScale.y);
+  }
+
+  ImGui::End();
+  ImGui::PopStyleVar();
+
+  return window_height;
+}
+
 void AddTypedMessage(MessageType type, const std::string& message, u32 ms, u32 rgba)
 {
   std::lock_guard<std::mutex> lock(s_messages_mutex);
@@ -35,14 +92,6 @@ void AddMessage(const std::string& message, u32 ms, u32 rgba)
                      Message(message, Common::Timer::GetTimeMs() + ms, rgba));
 }
 
-void DrawMessage(const Message& msg, int top, int left, int time_left)
-{
-  float alpha = std::min(1.0f, std::max(0.0f, time_left / 1024.0f));
-  u32 color = (msg.m_rgba & 0xFFFFFF) | ((u32)((msg.m_rgba >> 24) * alpha) << 24);
-
-  g_renderer->RenderText(msg.m_str, left, top, color);
-}
-
 void DrawMessages()
 {
   if (!SConfig::GetInstance().bOnScreenDisplayMessages)
@@ -51,21 +100,22 @@ void DrawMessages()
   {
     std::lock_guard<std::mutex> lock(s_messages_mutex);
 
-    u32 now = Common::Timer::GetTimeMs();
-    int left = 20, top = 35;
+    const u32 now = Common::Timer::GetTimeMs();
+    float current_x = LEFT_MARGIN * ImGui::GetIO().DisplayFramebufferScale.x;
+    float current_y = TOP_MARGIN * ImGui::GetIO().DisplayFramebufferScale.y;
+    int index = 0;
 
     auto it = s_messages.begin();
     while (it != s_messages.end())
     {
       const Message& msg = it->second;
-      int time_left = (int)(msg.m_timestamp - now);
-      DrawMessage(msg, top, left, time_left);
+      const int time_left = static_cast<int>(msg.timestamp - now);
+      current_y += DrawMessage(index++, msg, ImVec2(current_x, current_y), time_left);
 
       if (time_left <= 0)
         it = s_messages.erase(it);
       else
         ++it;
-      top += 15;
     }
   }
 }
@@ -75,24 +125,4 @@ void ClearMessages()
   std::lock_guard<std::mutex> lock(s_messages_mutex);
   s_messages.clear();
 }
-
-// On-Screen Display Callbacks
-void AddCallback(CallbackType type, Callback cb)
-{
-  s_callbacks.emplace(type, cb);
-}
-
-void DoCallbacks(CallbackType type)
-{
-  auto it_bounds = s_callbacks.equal_range(type);
-  for (auto it = it_bounds.first; it != it_bounds.second; ++it)
-  {
-    it->second();
-  }
-
-  // Wipe all callbacks on shutdown
-  if (type == CallbackType::Shutdown)
-    s_callbacks.clear();
 }
-
-}  // namespace
diff --git a/Source/Core/VideoCommon/OnScreenDisplay.h b/Source/Core/VideoCommon/OnScreenDisplay.h
index a05f4058ef..51358aff19 100644
--- a/Source/Core/VideoCommon/OnScreenDisplay.h
+++ b/Source/Core/VideoCommon/OnScreenDisplay.h
@@ -11,15 +11,6 @@
 
 namespace OSD
 {
-struct Message
-{
-  Message() {}
-  Message(const std::string& s, u32 ts, u32 rgba) : m_str(s), m_timestamp(ts), m_rgba(rgba) {}
-  std::string m_str;
-  u32 m_timestamp;
-  u32 m_rgba;
-};
-
 enum class MessageType
 {
   NetPlayPing,
@@ -49,20 +40,7 @@ constexpr u32 VERY_LONG = 10000;
 void AddMessage(const std::string& message, u32 ms = Duration::SHORT, u32 rgba = Color::YELLOW);
 void AddTypedMessage(MessageType type, const std::string& message, u32 ms = Duration::SHORT,
                      u32 rgba = Color::YELLOW);
-void DrawMessage(const Message& msg, int top, int left, int time_left);  // draw one message
 void DrawMessages();  // draw the current messages on the screen. Only call once
                       // per frame.
 void ClearMessages();
-
-// On-screen callbacks
-enum class CallbackType
-{
-  Initialization,
-  OnFrame,
-  Shutdown
-};
-using Callback = std::function<void()>;
-
-void AddCallback(CallbackType type, Callback cb);
-void DoCallbacks(CallbackType type);
 }  // namespace OSD
diff --git a/Source/Core/VideoCommon/RenderBase.cpp b/Source/Core/VideoCommon/RenderBase.cpp
index d30a7ccac3..76f3d29864 100644
--- a/Source/Core/VideoCommon/RenderBase.cpp
+++ b/Source/Core/VideoCommon/RenderBase.cpp
@@ -65,6 +65,7 @@
 #include "VideoCommon/Statistics.h"
 #include "VideoCommon/TextureCacheBase.h"
 #include "VideoCommon/TextureDecoder.h"
+#include "VideoCommon/VertexLoaderManager.h"
 #include "VideoCommon/VertexManagerBase.h"
 #include "VideoCommon/VertexShaderManager.h"
 #include "VideoCommon/VideoConfig.h"
@@ -261,139 +262,64 @@ bool Renderer::CheckForHostConfigChanges()
 // Create On-Screen-Messages
 void Renderer::DrawDebugText()
 {
-  std::string final_yellow, final_cyan;
+  const auto& config = SConfig::GetInstance();
 
-  if (g_ActiveConfig.bShowFPS || SConfig::GetInstance().m_ShowFrameCount)
+  if (g_ActiveConfig.bShowFPS)
   {
-    if (g_ActiveConfig.bShowFPS)
-      final_cyan += StringFromFormat("FPS: %.2f", m_fps_counter.GetFPS());
-
-    if (g_ActiveConfig.bShowFPS && SConfig::GetInstance().m_ShowFrameCount)
-      final_cyan += " - ";
-    if (SConfig::GetInstance().m_ShowFrameCount)
+    // Position in the top-right corner of the screen.
+    ImGui::SetNextWindowPos(ImVec2(ImGui::GetIO().DisplaySize.x - (10.0f * m_backbuffer_scale),
+                                   10.0f * m_backbuffer_scale),
+                            ImGuiCond_Always, ImVec2(1.0f, 0.0f));
+    ImGui::SetNextWindowSize(ImVec2(100.0f * m_backbuffer_scale, 30.0f * m_backbuffer_scale));
+
+    if (ImGui::Begin("FPS", nullptr,
+                     ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoInputs |
+                         ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoSavedSettings |
+                         ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoNav |
+                         ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoFocusOnAppearing))
     {
-      final_cyan += StringFromFormat("Frame: %" PRIu64, Movie::GetCurrentFrame());
-      if (Movie::IsPlayingInput())
-        final_cyan += StringFromFormat("\nInput: %" PRIu64 " / %" PRIu64,
-                                       Movie::GetCurrentInputCount(), Movie::GetTotalInputCount());
+      ImGui::TextColored(ImVec4(0.0f, 1.0f, 1.0f, 1.0f), "FPS: %.2f", m_fps_counter.GetFPS());
     }
-
-    final_cyan += "\n";
-    final_yellow += "\n";
-  }
-
-  if (SConfig::GetInstance().m_ShowLag)
-  {
-    final_cyan += StringFromFormat("Lag: %" PRIu64 "\n", Movie::GetCurrentLagCount());
-    final_yellow += "\n";
-  }
-
-  if (SConfig::GetInstance().m_ShowInputDisplay)
-  {
-    final_cyan += Movie::GetInputDisplay();
-    final_yellow += "\n";
-  }
-
-  if (SConfig::GetInstance().m_ShowRTC)
-  {
-    final_cyan += Movie::GetRTCDisplay();
-    final_yellow += "\n";
+    ImGui::End();
   }
 
-  // OSD Menu messages
-  if (m_osd_message > 0)
+  const bool show_movie_window =
+      config.m_ShowFrameCount | config.m_ShowLag | config.m_ShowInputDisplay | config.m_ShowRTC;
+  if (show_movie_window)
   {
-    m_osd_time = Common::Timer::GetTimeMs() + 3000;
-    m_osd_message = -m_osd_message;
-  }
-
-  if (static_cast<u32>(m_osd_time) > Common::Timer::GetTimeMs())
-  {
-    std::string res_text;
-    switch (g_ActiveConfig.iEFBScale)
-    {
-    case EFB_SCALE_AUTO_INTEGRAL:
-      res_text = "Auto (integral)";
-      break;
-    case 1:
-      res_text = "Native";
-      break;
-    default:
-      res_text = StringFromFormat("%dx", g_ActiveConfig.iEFBScale);
-      break;
-    }
-    const char* ar_text = "";
-    switch (g_ActiveConfig.aspect_mode)
-    {
-    case AspectMode::Stretch:
-      ar_text = "Stretch";
-      break;
-    case AspectMode::Analog:
-      ar_text = "Force 4:3";
-      break;
-    case AspectMode::AnalogWide:
-      ar_text = "Force 16:9";
-      break;
-    case AspectMode::Auto:
-    default:
-      ar_text = "Auto";
-      break;
-    }
-    const std::string audio_text = SConfig::GetInstance().m_IsMuted ?
-                                       "Muted" :
-                                       std::to_string(SConfig::GetInstance().m_Volume) + "%";
-
-    const char* const efbcopy_text = g_ActiveConfig.bSkipEFBCopyToRam ? "to Texture" : "to RAM";
-    const char* const xfbcopy_text = g_ActiveConfig.bSkipXFBCopyToRam ? "to Texture" : "to RAM";
-
-    // The rows
-    const std::string lines[] = {
-        std::string("Internal Resolution: ") + res_text,
-        std::string("Aspect Ratio: ") + ar_text + (g_ActiveConfig.bCrop ? " (crop)" : ""),
-        std::string("Copy EFB: ") + efbcopy_text,
-        std::string("Fog: ") + (g_ActiveConfig.bDisableFog ? "Disabled" : "Enabled"),
-        SConfig::GetInstance().m_EmulationSpeed <= 0 ?
-            "Speed Limit: Unlimited" :
-            StringFromFormat("Speed Limit: %li%%",
-                             std::lround(SConfig::GetInstance().m_EmulationSpeed * 100.f)),
-        std::string("Copy XFB: ") + xfbcopy_text +
-            (g_ActiveConfig.bImmediateXFB ? " (Immediate)" : ""),
-        "Volume: " + audio_text,
-    };
-
-    enum
-    {
-      lines_count = sizeof(lines) / sizeof(*lines)
-    };
-
-    // The latest changed setting in yellow
-    for (int i = 0; i != lines_count; ++i)
-    {
-      if (m_osd_message == -i - 1)
-        final_yellow += lines[i];
-      final_yellow += '\n';
-    }
-
-    // The other settings in cyan
-    for (int i = 0; i != lines_count; ++i)
+    // Position under the FPS display.
+    ImGui::SetNextWindowPos(ImVec2(ImGui::GetIO().DisplaySize.x - (10.0f * m_backbuffer_scale),
+                                   50.0f * m_backbuffer_scale),
+                            ImGuiCond_FirstUseEver, ImVec2(1.0f, 0.0f));
+    ImGui::SetNextWindowSizeConstraints(
+        ImVec2(150.0f * m_backbuffer_scale, 20.0f * m_backbuffer_scale),
+        ImGui::GetIO().DisplaySize);
+    if (ImGui::Begin("Movie", nullptr, ImGuiWindowFlags_NoFocusOnAppearing))
     {
-      if (m_osd_message != -i - 1)
-        final_cyan += lines[i];
-      final_cyan += '\n';
+      if (config.m_ShowFrameCount)
+      {
+        ImGui::Text("Frame: %" PRIu64, Movie::GetCurrentFrame());
+      }
+      if (Movie::IsPlayingInput())
+      {
+        ImGui::Text("Input: %" PRIu64 " / %" PRIu64, Movie::GetCurrentInputCount(),
+                    Movie::GetTotalInputCount());
+      }
+      if (SConfig::GetInstance().m_ShowLag)
+        ImGui::Text("Lag: %" PRIu64 "\n", Movie::GetCurrentLagCount());
+      if (SConfig::GetInstance().m_ShowInputDisplay)
+        ImGui::TextUnformatted(Movie::GetInputDisplay().c_str());
+      if (SConfig::GetInstance().m_ShowRTC)
+        ImGui::TextUnformatted(Movie::GetRTCDisplay().c_str());
     }
+    ImGui::End();
   }
 
-  final_cyan += Common::Profiler::ToString();
-
   if (g_ActiveConfig.bOverlayStats)
-    final_cyan += Statistics::ToString();
+    Statistics::Display();
 
   if (g_ActiveConfig.bOverlayProjStats)
-    final_cyan += Statistics::ToStringProj();
-
-  // and then the text
-  RenderText(final_cyan, 20, 20, 0xFF00FFFF);
-  RenderText(final_yellow, 20, 20, 0xFFFFFF00);
+    Statistics::DisplayProj();
 }
 
 float Renderer::CalculateDrawAspectRatio() const
@@ -955,6 +881,8 @@ void Renderer::Swap(u32 xfbAddr, u32 fbWidth, u32 fbStride, u32 fbHeight, const
 
       // Draw any imgui overlays we have. Note that "draw" here means "create commands", the actual
       // draw calls don't get issued until DrawImGui is called, which happens in SwapImpl.
+      DrawDebugText();
+      OSD::DrawMessages();
       ImGui::Render();
 
       // TODO: merge more generic parts into VideoCommon
@@ -1332,8 +1260,3 @@ std::unique_ptr<VideoCommon::AsyncShaderCompiler> Renderer::CreateAsyncShaderCom
 {
   return std::make_unique<VideoCommon::AsyncShaderCompiler>();
 }
-
-void Renderer::ShowOSDMessage(OSDMessage message)
-{
-  m_osd_message = static_cast<s32>(message);
-}
diff --git a/Source/Core/VideoCommon/RenderBase.h b/Source/Core/VideoCommon/RenderBase.h
index b232d2c61f..b31384794c 100644
--- a/Source/Core/VideoCommon/RenderBase.h
+++ b/Source/Core/VideoCommon/RenderBase.h
@@ -57,17 +57,6 @@ struct EfbPokeData
 
 extern int frameCount;
 
-enum class OSDMessage : s32
-{
-  IRChanged = 1,
-  ARToggled = 2,
-  EFBCopyToggled = 3,
-  FogToggled = 4,
-  SpeedChanged = 5,
-  XFBChanged = 6,
-  VolumeChanged = 7,
-};
-
 // Renderer really isn't a very good name for this class - it's more like "Misc".
 // The long term goal is to get rid of this class and replace it with others that make
 // more sense.
@@ -201,8 +190,6 @@ public:
 
   virtual std::unique_ptr<VideoCommon::AsyncShaderCompiler> CreateAsyncShaderCompiler();
 
-  void ShowOSDMessage(OSDMessage message);
-
 protected:
   std::tuple<int, int> CalculateTargetScale(int x, int y) const;
   bool CalculateTargetSize();
@@ -303,9 +290,6 @@ private:
   u32 m_last_xfb_width = MAX_XFB_WIDTH;
   u32 m_last_xfb_height = MAX_XFB_HEIGHT;
 
-  s32 m_osd_message = 0;
-  s32 m_osd_time = 0;
-
   // NOTE: The methods below are called on the framedumping thread.
   bool StartFrameDumpToAVI(const FrameDumpConfig& config);
   void DumpFrameToAVI(const FrameDumpConfig& config);
diff --git a/Source/Core/VideoCommon/Statistics.cpp b/Source/Core/VideoCommon/Statistics.cpp
index 0a4a9236b0..af122bfcdb 100644
--- a/Source/Core/VideoCommon/Statistics.cpp
+++ b/Source/Core/VideoCommon/Statistics.cpp
@@ -6,6 +6,8 @@
 #include <string>
 #include <utility>
 
+#include "imgui.h"
+
 #include "Common/StringUtil.h"
 #include "VideoCommon/Statistics.h"
 #include "VideoCommon/VertexLoaderManager.h"
@@ -26,91 +28,98 @@ void Statistics::SwapDL()
   std::swap(stats.thisFrame.numBPLoadsInDL, stats.thisFrame.numBPLoads);
 }
 
-std::string Statistics::ToString()
+void Statistics::Display()
 {
-  std::string str;
+  const float scale = ImGui::GetIO().DisplayFramebufferScale.x;
+  ImGui::SetNextWindowPos(ImVec2(10.0f * scale, 10.0f * scale), ImGuiCond_FirstUseEver);
+  ImGui::SetNextWindowSizeConstraints(ImVec2(275.0f * scale, 400.0f * scale),
+                                      ImGui::GetIO().DisplaySize);
+  if (!ImGui::Begin("Statistics", nullptr, ImGuiWindowFlags_NoNavInputs))
+  {
+    ImGui::End();
+    return;
+  }
+
+  ImGui::Columns(2, "Statistics", true);
+
+#define DRAW_STAT(name, format, ...)                                                               \
+  ImGui::Text(name);                                                                               \
+  ImGui::NextColumn();                                                                             \
+  ImGui::Text(format, __VA_ARGS__);                                                                \
+  ImGui::NextColumn();
 
   if (g_ActiveConfig.backend_info.api_type == APIType::Nothing)
   {
-    str += StringFromFormat("Objects:            %i\n", stats.thisFrame.numDrawnObjects);
-    str += StringFromFormat("Vertices Loaded:    %i\n", stats.thisFrame.numVerticesLoaded);
-    str += StringFromFormat("Triangles Input:    %i\n", stats.thisFrame.numTrianglesIn);
-    str += StringFromFormat("Triangles Rejected: %i\n", stats.thisFrame.numTrianglesRejected);
-    str += StringFromFormat("Triangles Culled:   %i\n", stats.thisFrame.numTrianglesCulled);
-    str += StringFromFormat("Triangles Clipped:  %i\n", stats.thisFrame.numTrianglesClipped);
-    str += StringFromFormat("Triangles Drawn:    %i\n", stats.thisFrame.numTrianglesDrawn);
-    str += StringFromFormat("Rasterized Pix:     %i\n", stats.thisFrame.rasterizedPixels);
-    str += StringFromFormat("TEV Pix In:         %i\n", stats.thisFrame.tevPixelsIn);
-    str += StringFromFormat("TEV Pix Out:        %i\n", stats.thisFrame.tevPixelsOut);
+    DRAW_STAT("Objects", "%d", stats.thisFrame.numDrawnObjects);
+    DRAW_STAT("Vertices Loaded", "%d", stats.thisFrame.numVerticesLoaded);
+    DRAW_STAT("Triangles Input", "%d", stats.thisFrame.numTrianglesIn);
+    DRAW_STAT("Triangles Rejected", "%d", stats.thisFrame.numTrianglesRejected);
+    DRAW_STAT("Triangles Culled", "%d", stats.thisFrame.numTrianglesCulled);
+    DRAW_STAT("Triangles Clipped", "%d", stats.thisFrame.numTrianglesClipped);
+    DRAW_STAT("Triangles Drawn", "%d", stats.thisFrame.numTrianglesDrawn);
+    DRAW_STAT("Rasterized Pix", "%d", stats.thisFrame.rasterizedPixels);
+    DRAW_STAT("TEV Pix In", "%d", stats.thisFrame.tevPixelsIn);
+    DRAW_STAT("TEV Pix Out", "%d", stats.thisFrame.tevPixelsOut);
   }
 
-  str += StringFromFormat("Textures created: %i\n", stats.numTexturesCreated);
-  str += StringFromFormat("Textures uploaded: %i\n", stats.numTexturesUploaded);
-  str += StringFromFormat("Textures alive: %i\n", stats.numTexturesAlive);
-  str += StringFromFormat("pshaders created: %i\n", stats.numPixelShadersCreated);
-  str += StringFromFormat("pshaders alive: %i\n", stats.numPixelShadersAlive);
-  str += StringFromFormat("vshaders created: %i\n", stats.numVertexShadersCreated);
-  str += StringFromFormat("vshaders alive: %i\n", stats.numVertexShadersAlive);
-  str += StringFromFormat("shaders changes: %i\n", stats.thisFrame.numShaderChanges);
-  str += StringFromFormat("dlists called: %i\n", stats.thisFrame.numDListsCalled);
-  str += StringFromFormat("Primitive joins: %i\n", stats.thisFrame.numPrimitiveJoins);
-  str += StringFromFormat("Draw calls: %i\n", stats.thisFrame.numDrawCalls);
-  str += StringFromFormat("Primitives: %i\n", stats.thisFrame.numPrims);
-  str += StringFromFormat("Primitives (DL): %i\n", stats.thisFrame.numDLPrims);
-  str += StringFromFormat("XF loads: %i\n", stats.thisFrame.numXFLoads);
-  str += StringFromFormat("XF loads (DL): %i\n", stats.thisFrame.numXFLoadsInDL);
-  str += StringFromFormat("CP loads: %i\n", stats.thisFrame.numCPLoads);
-  str += StringFromFormat("CP loads (DL): %i\n", stats.thisFrame.numCPLoadsInDL);
-  str += StringFromFormat("BP loads: %i\n", stats.thisFrame.numBPLoads);
-  str += StringFromFormat("BP loads (DL): %i\n", stats.thisFrame.numBPLoadsInDL);
-  str += StringFromFormat("Vertex streamed: %i kB\n", stats.thisFrame.bytesVertexStreamed / 1024);
-  str += StringFromFormat("Index streamed: %i kB\n", stats.thisFrame.bytesIndexStreamed / 1024);
-  str += StringFromFormat("Uniform streamed: %i kB\n", stats.thisFrame.bytesUniformStreamed / 1024);
-  str += StringFromFormat("Vertex Loaders: %i\n", stats.numVertexLoaders);
-
-  std::string vertex_list = VertexLoaderManager::VertexLoadersToString();
-
-  // TODO : at some point text1 just becomes too huge and overflows, we can't even read the added
-  // stuff
-  // since it gets added at the far bottom of the screen anyway (actually outside the rendering
-  // window)
-  // we should really reset the list instead of using substr
-  if (vertex_list.size() + str.size() > 8170)
-    vertex_list = vertex_list.substr(0, 8170 - str.size());
-
-  str += vertex_list;
-
-  return str;
+  DRAW_STAT("Textures created", "%d", stats.numTexturesCreated);
+  DRAW_STAT("Textures uploaded", "%d", stats.numTexturesUploaded);
+  DRAW_STAT("Textures alive", "%d", stats.numTexturesAlive);
+  DRAW_STAT("pshaders created", "%d", stats.numPixelShadersCreated);
+  DRAW_STAT("pshaders alive", "%d", stats.numPixelShadersAlive);
+  DRAW_STAT("vshaders created", "%d", stats.numVertexShadersCreated);
+  DRAW_STAT("vshaders alive", "%d", stats.numVertexShadersAlive);
+  DRAW_STAT("shaders changes", "%d", stats.thisFrame.numShaderChanges);
+  DRAW_STAT("dlists called", "%d", stats.thisFrame.numDListsCalled);
+  DRAW_STAT("Primitive joins", "%d", stats.thisFrame.numPrimitiveJoins);
+  DRAW_STAT("Draw calls", "%d", stats.thisFrame.numDrawCalls);
+  DRAW_STAT("Primitives", "%d", stats.thisFrame.numPrims);
+  DRAW_STAT("Primitives (DL)", "%d", stats.thisFrame.numDLPrims);
+  DRAW_STAT("XF loads", "%d", stats.thisFrame.numXFLoads);
+  DRAW_STAT("XF loads (DL)", "%d", stats.thisFrame.numXFLoadsInDL);
+  DRAW_STAT("CP loads", "%d", stats.thisFrame.numCPLoads);
+  DRAW_STAT("CP loads (DL)", "%d", stats.thisFrame.numCPLoadsInDL);
+  DRAW_STAT("BP loads", "%d", stats.thisFrame.numBPLoads);
+  DRAW_STAT("BP loads (DL)", "%d", stats.thisFrame.numBPLoadsInDL);
+  DRAW_STAT("Vertex streamed", "%i kB", stats.thisFrame.bytesVertexStreamed / 1024);
+  DRAW_STAT("Index streamed", "%i kB", stats.thisFrame.bytesIndexStreamed / 1024);
+  DRAW_STAT("Uniform streamed", "%i kB", stats.thisFrame.bytesUniformStreamed / 1024);
+  DRAW_STAT("Vertex Loaders", "%d", stats.numVertexLoaders);
+
+#undef DRAW_STAT
+
+  ImGui::Columns(1);
+
+  ImGui::End();
 }
 
 // Is this really needed?
-std::string Statistics::ToStringProj()
+void Statistics::DisplayProj()
 {
-  std::string projections;
-
-  projections += "Projection #: X for Raw 6=0 (X for Raw 6!=0)\n\n";
-  projections += StringFromFormat("Projection 0: %f (%f) Raw 0: %f\n", stats.gproj_0,
-                                  stats.g2proj_0, stats.proj_0);
-  projections += StringFromFormat("Projection 1: %f (%f)\n", stats.gproj_1, stats.g2proj_1);
-  projections += StringFromFormat("Projection 2: %f (%f) Raw 1: %f\n", stats.gproj_2,
-                                  stats.g2proj_2, stats.proj_1);
-  projections += StringFromFormat("Projection 3: %f (%f)\n\n", stats.gproj_3, stats.g2proj_3);
-  projections += StringFromFormat("Projection 4: %f (%f)\n", stats.gproj_4, stats.g2proj_4);
-  projections += StringFromFormat("Projection 5: %f (%f) Raw 2: %f\n", stats.gproj_5,
-                                  stats.g2proj_5, stats.proj_2);
-  projections += StringFromFormat("Projection 6: %f (%f) Raw 3: %f\n", stats.gproj_6,
-                                  stats.g2proj_6, stats.proj_3);
-  projections += StringFromFormat("Projection 7: %f (%f)\n\n", stats.gproj_7, stats.g2proj_7);
-  projections += StringFromFormat("Projection 8: %f (%f)\n", stats.gproj_8, stats.g2proj_8);
-  projections += StringFromFormat("Projection 9: %f (%f)\n", stats.gproj_9, stats.g2proj_9);
-  projections += StringFromFormat("Projection 10: %f (%f) Raw 4: %f\n\n", stats.gproj_10,
-                                  stats.g2proj_10, stats.proj_4);
-  projections += StringFromFormat("Projection 11: %f (%f) Raw 5: %f\n\n", stats.gproj_11,
-                                  stats.g2proj_11, stats.proj_5);
-  projections += StringFromFormat("Projection 12: %f (%f)\n", stats.gproj_12, stats.g2proj_12);
-  projections += StringFromFormat("Projection 13: %f (%f)\n", stats.gproj_13, stats.g2proj_13);
-  projections += StringFromFormat("Projection 14: %f (%f)\n", stats.gproj_14, stats.g2proj_14);
-  projections += StringFromFormat("Projection 15: %f (%f)\n", stats.gproj_15, stats.g2proj_15);
-
-  return projections;
+  if (!ImGui::Begin("Projection Statistics", nullptr, ImGuiWindowFlags_NoNavInputs))
+  {
+    ImGui::End();
+    return;
+  }
+
+  ImGui::Text("Projection #: X for Raw 6=0 (X for Raw 6!=0)");
+  ImGui::NewLine();
+  ImGui::Text("Projection 0: %f (%f) Raw 0: %f", stats.gproj_0, stats.g2proj_0, stats.proj_0);
+  ImGui::Text("Projection 1: %f (%f)", stats.gproj_1, stats.g2proj_1);
+  ImGui::Text("Projection 2: %f (%f) Raw 1: %f", stats.gproj_2, stats.g2proj_2, stats.proj_1);
+  ImGui::Text("Projection 3: %f (%f)", stats.gproj_3, stats.g2proj_3);
+  ImGui::Text("Projection 4: %f (%f)", stats.gproj_4, stats.g2proj_4);
+  ImGui::Text("Projection 5: %f (%f) Raw 2: %f", stats.gproj_5, stats.g2proj_5, stats.proj_2);
+  ImGui::Text("Projection 6: %f (%f) Raw 3: %f", stats.gproj_6, stats.g2proj_6, stats.proj_3);
+  ImGui::Text("Projection 7: %f (%f)", stats.gproj_7, stats.g2proj_7);
+  ImGui::Text("Projection 8: %f (%f)", stats.gproj_8, stats.g2proj_8);
+  ImGui::Text("Projection 9: %f (%f)", stats.gproj_9, stats.g2proj_9);
+  ImGui::Text("Projection 10: %f (%f) Raw 4: %f", stats.gproj_10, stats.g2proj_10, stats.proj_4);
+  ImGui::Text("Projection 11: %f (%f) Raw 5: %f", stats.gproj_11, stats.g2proj_11, stats.proj_5);
+  ImGui::Text("Projection 12: %f (%f)", stats.gproj_12, stats.g2proj_12);
+  ImGui::Text("Projection 13: %f (%f)", stats.gproj_13, stats.g2proj_13);
+  ImGui::Text("Projection 14: %f (%f)", stats.gproj_14, stats.g2proj_14);
+  ImGui::Text("Projection 15: %f (%f)", stats.gproj_15, stats.g2proj_15);
+
+  ImGui::End();
 }
diff --git a/Source/Core/VideoCommon/Statistics.h b/Source/Core/VideoCommon/Statistics.h
index 74ee317b82..c743bf7f08 100644
--- a/Source/Core/VideoCommon/Statistics.h
+++ b/Source/Core/VideoCommon/Statistics.h
@@ -65,9 +65,8 @@ struct Statistics
   ThisFrame thisFrame;
   void ResetFrame();
   static void SwapDL();
-
-  static std::string ToString();
-  static std::string ToStringProj();
+  static void Display();
+  static void DisplayProj();
 };
 
 extern Statistics stats;
diff --git a/Source/Core/VideoCommon/VideoBackendBase.cpp b/Source/Core/VideoCommon/VideoBackendBase.cpp
index fd6bbdfa2b..aa8b3d110f 100644
--- a/Source/Core/VideoCommon/VideoBackendBase.cpp
+++ b/Source/Core/VideoCommon/VideoBackendBase.cpp
@@ -278,9 +278,6 @@ void VideoBackendBase::InitializeShared()
   memset(&g_preprocess_cp_state, 0, sizeof(g_preprocess_cp_state));
   memset(texMem, 0, TMEM_SIZE);
 
-  // Do our OSD callbacks
-  OSD::DoCallbacks(OSD::CallbackType::Initialization);
-
   // do not initialize again for the config window
   m_initialized = true;
 
@@ -303,9 +300,6 @@ void VideoBackendBase::InitializeShared()
 
 void VideoBackendBase::ShutdownShared()
 {
-  // Do our OSD callbacks
-  OSD::DoCallbacks(OSD::CallbackType::Shutdown);
-
   m_initialized = false;
 
   VertexLoaderManager::Clear();