From 8a7db025ef113912a79363d43db4875af44fbabd Mon Sep 17 00:00:00 2001
From: Janus Thorborg <janus.thorborg@gmail.com>
Date: Sat, 3 Jan 2026 18:32:27 +0100
Subject: [PATCH] Direct2D: Effect revert of 14d5276 removing ClearType
 Antialiasing

This adds Windows ClearType font antialiasing back as a disabled-by-default option "JUCE_ENABLE_DIRECT2D_CLEARTYPE_FONT_SMOOTHING" in the juce_graphics module.
---
 modules/juce_graphics/juce_graphics.h         | 11 ++++++++++
 .../native/juce_DirectX_windows.cpp           | 21 ++++++++++++++++++-
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/modules/juce_graphics/juce_graphics.h b/modules/juce_graphics/juce_graphics.h
index 287c11873f..1b48a41127 100644
--- a/modules/juce_graphics/juce_graphics.h
+++ b/modules/juce_graphics/juce_graphics.h
@@ -87,6 +87,17 @@
  #define JUCE_DISABLE_COREGRAPHICS_FONT_SMOOTHING 0
 #endif
 
+/** Config: JUCE_ENABLE_DIRECT2D_CLEARTYPE_FONT_SMOOTHING
+
+    Setting this flag will *enable* Windows ClearType subpixel font antialiasing when using
+    the Direct2D renderer, if preferred by the end user. This is off by default due to
+    issues with transparency, certain compositions and transformations so make sure the 
+    output looks acceptable for your use cases.
+*/
+#ifndef JUCE_ENABLE_DIRECT2D_CLEARTYPE_FONT_SMOOTHING
+#define JUCE_ENABLE_DIRECT2D_CLEARTYPE_FONT_SMOOTHING 0
+#endif
+
 #ifndef JUCE_INCLUDE_PNGLIB_CODE
  #define JUCE_INCLUDE_PNGLIB_CODE 1
 #endif
diff --git a/modules/juce_graphics/native/juce_DirectX_windows.cpp b/modules/juce_graphics/native/juce_DirectX_windows.cpp
index be8b59c7cc..f43371f092 100644
--- a/modules/juce_graphics/native/juce_DirectX_windows.cpp
+++ b/modules/juce_graphics/native/juce_DirectX_windows.cpp
@@ -270,7 +270,26 @@ ComSmartPtr<ID2D1DeviceContext1> Direct2DDeviceContext::create (ComSmartPtr<ID2D
         return {};
     }
 
-    result->SetTextAntialiasMode (D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE);
+#if JUCE_ENABLE_DIRECT2D_CLEARTYPE_FONT_SMOOTHING 
+    const auto textAntialiasing = [&]
+    {
+        BOOL smoothingEnabled{};
+        SystemParametersInfo(SPI_GETFONTSMOOTHING, 0, &smoothingEnabled, 0);
+
+        if (!smoothingEnabled)
+            return D2D1_TEXT_ANTIALIAS_MODE_ALIASED;
+
+        UINT smoothingKind{};
+        SystemParametersInfo(SPI_GETFONTSMOOTHINGTYPE, 0, &smoothingKind, 0);
+        return smoothingKind == FE_FONTSMOOTHINGCLEARTYPE ? D2D1_TEXT_ANTIALIAS_MODE_CLEARTYPE
+            : D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE;
+    }();
+
+    result->SetTextAntialiasMode(textAntialiasing);
+#else
+    result->SetTextAntialiasMode(D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE);
+#endif
+
     result->SetAntialiasMode (D2D1_ANTIALIAS_MODE_PER_PRIMITIVE);
     result->SetUnitMode (D2D1_UNIT_MODE_PIXELS);