DolphinQt: Don't overwrite >8x IR scale in ini, add maximum internal res option

This adds an ini-only setting under GFX.ini -> [Settings] ->
MaxInternalResolution. Setting this will allow the user to select
resolutions beyond the default 8x max scale in graphics options.

3 files changed, 23 insertions, 12 deletions

diff --git a/Source/Core/Core/Config/GraphicsSettings.cpp b/Source/Core/Core/Config/GraphicsSettings.cpp
index 83baf5ae05..84b9a49244 100644
--- a/Source/Core/Core/Config/GraphicsSettings.cpp
+++ b/Source/Core/Core/Config/GraphicsSettings.cpp
@@ -61,6 +61,7 @@ const ConfigInfo<bool> GFX_FAST_DEPTH_CALC{{System::GFX, "Settings", "FastDepthC
 const ConfigInfo<u32> GFX_MSAA{{System::GFX, "Settings", "MSAA"}, 1};
 const ConfigInfo<bool> GFX_SSAA{{System::GFX, "Settings", "SSAA"}, false};
 const ConfigInfo<int> GFX_EFB_SCALE{{System::GFX, "Settings", "InternalResolution"}, 1};
+const ConfigInfo<int> GFX_MAX_EFB_SCALE{{System::GFX, "Settings", "MaxInternalResolution"}, 8};
 const ConfigInfo<bool> GFX_TEXFMT_OVERLAY_ENABLE{{System::GFX, "Settings", "TexFmtOverlayEnable"},
                                                  false};
 const ConfigInfo<bool> GFX_TEXFMT_OVERLAY_CENTER{{System::GFX, "Settings", "TexFmtOverlayCenter"},
diff --git a/Source/Core/Core/Config/GraphicsSettings.h b/Source/Core/Core/Config/GraphicsSettings.h
index dc8d501fab..26f62382ca 100644
--- a/Source/Core/Core/Config/GraphicsSettings.h
+++ b/Source/Core/Core/Config/GraphicsSettings.h
@@ -54,6 +54,7 @@ extern const ConfigInfo<bool> GFX_FAST_DEPTH_CALC;
 extern const ConfigInfo<u32> GFX_MSAA;
 extern const ConfigInfo<bool> GFX_SSAA;
 extern const ConfigInfo<int> GFX_EFB_SCALE;
+extern const ConfigInfo<int> GFX_MAX_EFB_SCALE;
 extern const ConfigInfo<bool> GFX_TEXFMT_OVERLAY_ENABLE;
 extern const ConfigInfo<bool> GFX_TEXFMT_OVERLAY_CENTER;
 extern const ConfigInfo<bool> GFX_ENABLE_WIREFRAME;
diff --git a/Source/Core/DolphinQt/Config/Graphics/EnhancementsWidget.cpp b/Source/Core/DolphinQt/Config/Graphics/EnhancementsWidget.cpp
index 11d7befe58..0fcb0a6c53 100644
--- a/Source/Core/DolphinQt/Config/Graphics/EnhancementsWidget.cpp
+++ b/Source/Core/DolphinQt/Config/Graphics/EnhancementsWidget.cpp
@@ -26,6 +26,7 @@
 
 #include "VideoCommon/PostProcessing.h"
 #include "VideoCommon/VideoBackendBase.h"
+#include "VideoCommon/VideoCommon.h"
 #include "VideoCommon/VideoConfig.h"
 
 EnhancementsWidget::EnhancementsWidget(GraphicsWindow* parent)
@@ -48,21 +49,29 @@ void EnhancementsWidget::CreateWidgets()
   auto* enhancements_layout = new QGridLayout();
   enhancements_box->setLayout(enhancements_layout);
 
-  m_ir_combo = new GraphicsChoice({tr("Auto (Multiple of 640x528)"), tr("Native (640x528)"),
-                                   tr("2x Native (1280x1056) for 720p"),
-                                   tr("3x Native (1920x1584) for 1080p"),
-                                   tr("4x Native (2560x2112) for 1440p"),
-                                   tr("5x Native (3200x2640)"), tr("6x Native (3840x3168) for 4K"),
-                                   tr("7x Native (4480x3696)"), tr("8x Native (5120x4224) for 5K")},
-                                  Config::GFX_EFB_SCALE);
-
-  if (g_Config.iEFBScale > 8)
+  // Only display the first 8 scales, which most users will not go beyond.
+  QStringList resolution_options{
+      tr("Auto (Multiple of 640x528)"),      tr("Native (640x528)"),
+      tr("2x Native (1280x1056) for 720p"),  tr("3x Native (1920x1584) for 1080p"),
+      tr("4x Native (2560x2112) for 1440p"), tr("5x Native (3200x2640)"),
+      tr("6x Native (3840x3168) for 4K"),    tr("7x Native (4480x3696)"),
+      tr("8x Native (5120x4224) for 5K")};
+  const int visible_resolution_option_count = static_cast<int>(resolution_options.size());
+
+  // If the current scale is greater than the max scale in the ini, add sufficient options so that
+  // when the settings are saved we don't lose the user-modified value from the ini.
+  const int max_efb_scale =
+      std::max(Config::Get(Config::GFX_EFB_SCALE), Config::Get(Config::GFX_MAX_EFB_SCALE));
+  for (int scale = static_cast<int>(resolution_options.size()); scale <= max_efb_scale; scale++)
   {
-    m_ir_combo->addItem(tr("Custom"));
-    m_ir_combo->setCurrentIndex(m_ir_combo->count() - 1);
+    resolution_options.append(tr("%1x Native (%2x%3)")
+                                  .arg(QString::number(scale),
+                                       QString::number(static_cast<int>(EFB_WIDTH) * scale),
+                                       QString::number(static_cast<int>(EFB_HEIGHT) * scale)));
   }
 
-  m_ir_combo->setMaxVisibleItems(m_ir_combo->count());
+  m_ir_combo = new GraphicsChoice(resolution_options, Config::GFX_EFB_SCALE);
+  m_ir_combo->setMaxVisibleItems(visible_resolution_option_count);
 
   m_aa_combo = new QComboBox();
   m_af_combo = new GraphicsChoice({tr("1x"), tr("2x"), tr("4x"), tr("8x"), tr("16x")},