qt: For Qt 6.9.0 and above, use QImage::flipped over QImage::mirrored

The latter has been deprecated, and is causing build failures where deprecations warnings are treated as errors.

src/citra_qt/bootmanager.cpp

@@ -10,6 +10,7 @@
 #include <QWindow>
 #include "citra_qt/bootmanager.h"
 #include "citra_qt/citra_qt.h"
+#include "citra_qt/util/util.h"
 #include "common/color.h"
 #include "common/microprofile.h"
 #include "common/scm_rev.h"
@@ -714,7 +715,7 @@ void GRenderWindow::CaptureScreenshot(u32 res_scale, const QString& screenshot_p
         screenshot_image.bits(),
         [this, screenshot_path](bool invert_y) {
             const std::string std_screenshot_path = screenshot_path.toStdString();
-            if (screenshot_image.mirrored(false, invert_y).save(screenshot_path)) {
+            if (GetMirroredImage(screenshot_image, false, invert_y).save(screenshot_path)) {
                 LOG_INFO(Frontend, "Screenshot saved to \"{}\"", std_screenshot_path);
             } else {
                 LOG_ERROR(Frontend, "Failed to save screenshot to \"{}\"", std_screenshot_path);

src/citra_qt/camera/camera_util.cpp

@@ -7,6 +7,7 @@
 #include <cstring>
 #include <QImage>
 #include "citra_qt/camera/camera_util.h"
+#include "citra_qt/util/util.h"
 
 namespace CameraUtil {
 
@@ -213,9 +214,9 @@ std::vector<u16> ProcessImage(const QImage& image, int width, int height, bool o
     }
     QImage scaled =
         image.scaled(width, height, Qt::KeepAspectRatioByExpanding, Qt::SmoothTransformation);
-    QImage transformed =
+    QImage transformed = GetMirroredImage(
-        scaled.copy((scaled.width() - width) / 2, (scaled.height() - height) / 2, width, height)
+        scaled.copy((scaled.width() - width) / 2, (scaled.height() - height) / 2, width, height),
-            .mirrored(flip_horizontal, flip_vertical);
+        flip_horizontal, flip_vertical);
     if (output_rgb) {
         QImage converted = transformed.convertToFormat(QImage::Format_RGB16);
         std::memcpy(buffer.data(), converted.bits(), width * height * sizeof(u16));

src/citra_qt/util/util.cpp

@@ -175,3 +175,19 @@ const std::string GetApplicationsDirectory() {
     return QStandardPaths::writableLocation(QStandardPaths::ApplicationsLocation).toStdString();
 #endif
 }
+
+QImage GetMirroredImage(QImage source_image, bool flip_horizontal, bool flip_vertical) {
+#if QT_VERSION < QT_VERSION_CHECK(6, 9, 0) // Fallback, uses deprecated method
+    return source_image.mirrored(flip_horizontal, flip_vertical);
+#else // New method
+    auto orientation_horizontal = static_cast<Qt::Orientations>(0x0);
+    auto orientation_vertical = static_cast<Qt::Orientations>(0x0);
+
+    if (flip_horizontal)
+        orientation_horizontal = Qt::Horizontal;
+    if (flip_vertical)
+        orientation_vertical = Qt::Vertical;
+
+    return source_image.flipped(orientation_horizontal | orientation_vertical);
+#endif
+}

src/citra_qt/util/util.h

@@ -41,3 +41,11 @@ QPixmap GetQPixmapFromSMDH(const std::vector<u8>& smdh_data);
  * @return The user’s applications directory
  */
 [[nodiscard]] const std::string GetApplicationsDirectory();
+
+/**
+ * Imitates the deprecated `QImage::mirrored` function in a forwards-compatible manner
+ * @param flip_horizontal Whether the image should be flipped horizontally
+ * @param flip_vertical Whether the image should be flipped vertically
+ * @return QImage The mirrored image
+ */
+QImage GetMirroredImage(QImage source_image, bool flip_horizontal, bool flip_vertical);