From 0796e1204086fe60b67979d82d2cc27fd63e1955 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 15 Oct 2024 09:29:38 +0530
Subject: [PATCH] Add platform native interface to headless backed

Used by fontconfigdatabase as of Qt 6.8.0
---
 src/calibre/headless/headless_integration.cpp | 8 ++++++++
 src/calibre/headless/headless_integration.h   | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/src/calibre/headless/headless_integration.cpp b/src/calibre/headless/headless_integration.cpp
index 77b6ab0503..a5dfc869cc 100644
--- a/src/calibre/headless/headless_integration.cpp
+++ b/src/calibre/headless/headless_integration.cpp
@@ -21,6 +21,7 @@ class QCoreTextFontEngine;
 #include <qpa/qplatformwindow.h>
 #include <qpa/qplatformfontdatabase.h>
 #include <qpa/qplatformtheme.h>
+#include <qpa/qplatformnativeinterface.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -122,6 +123,13 @@ QAbstractEventDispatcher *HeadlessIntegration::createEventDispatcher() const
 #endif
 }
 
+QPlatformNativeInterface *HeadlessIntegration::nativeInterface() const
+{
+    if (!m_nativeInterface)
+        m_nativeInterface.reset(new QPlatformNativeInterface);
+    return m_nativeInterface.get();
+}
+
 HeadlessIntegration *HeadlessIntegration::instance()
 {
     return static_cast<HeadlessIntegration *>(QGuiApplicationPrivate::platformIntegration());
diff --git a/src/calibre/headless/headless_integration.h b/src/calibre/headless/headless_integration.h
index e4771aaa40..f8705facff 100644
--- a/src/calibre/headless/headless_integration.h
+++ b/src/calibre/headless/headless_integration.h
@@ -41,6 +41,7 @@ public:
     QPlatformOpenGLContext *createPlatformOpenGLContext(QOpenGLContext *context) const override;
 	QStringList themeNames() const override;
 	QPlatformTheme *createPlatformTheme(const QString &name) const override;
+    QPlatformNativeInterface *nativeInterface() const override;
 
     unsigned options() const { return 0; }
 
@@ -51,6 +52,7 @@ public:
 private:
     QScopedPointer<QPlatformFontDatabase> m_fontDatabase;
     QScopedPointer<QPlatformServices> platform_services;
+    mutable QScopedPointer<QPlatformNativeInterface> m_nativeInterface;
 };
 
 QT_END_NAMESPACE