fix(ui): scale large images and preserve original dimensions

Detect large images exceeding 4096px in either dimension and scale them down
while maintaining aspect ratio for performance optimization. Store original
dimensions in metadata and display them in the information dialog when
available, falling back to scaled dimensions when original data is not
present.

log: scale large images and preserve original dimensions
bug: https://pms.uniontech.com/bug-view-333195.html

Author: add-uos

src/qml/PreviewImageViewer/InformationDialog/InformationDialog.qml

@@ -109,7 +109,14 @@ DialogWindow {
                     PropertyItemDelegate {
                         Layout.fillWidth: true
                         contrlImplicitWidth: propMidWidth
-                        description: dimensionsStr
+                        description: {
+                            var originalDim = FileControl.slotGetInfo("OriginalDimension", filePath);
+                            if (originalDim && originalDim !== "-") {
+                                return originalDim;
+                            } else {
+                                return dimensionsStr;
+                            }
+                        }
                         title: qsTr("Dimensions")
                     }
 

src/src/unionimage/unionimage.cpp

@@ -403,6 +403,23 @@ UNIONIMAGESHARED_EXPORT bool loadStaticImageFromFile(const QString &path, QImage
             reader.setFormat(format_bar.toLatin1());
         }
         reader.setAutoTransform(true);
+        
+        // 增加内存限制，支持加载大图片
+        reader.setAllocationLimit(2048);
+        qDebug() << "Set QImageReader allocation limit to 2048MB";
+        
+        QSize originalSize = reader.size();
+        const int maxDimension = 4096;
+        if (originalSize.width() > maxDimension || originalSize.height() > maxDimension) {
+            qDebug() << "Large image detected (" << originalSize.width() << "x" << originalSize.height()
+                                  << "), scaling down to max dimension:" << maxDimension;
+            
+            QSize scaledSize = originalSize;
+            scaledSize.scale(maxDimension, maxDimension, Qt::KeepAspectRatio);
+            reader.setScaledSize(scaledSize);
+            qDebug() << "Image scaled to:" << scaledSize;
+        }
+        
         if (reader.imageCount() > 0 || file_suffix_upper != "ICNS") {
             res_qt = reader.read();
             if (res_qt.isNull()) {
@@ -767,10 +784,35 @@ UNIONIMAGESHARED_EXPORT QMap<QString, QString> getAllMetaData(const QString &pat
     }
     admMap.insert("DateTimeDigitized",  info.lastModified().toString("yyyy/MM/dd HH:mm"));
 
-           // The value of width and height might incorrect
+    // The value of width and height might incorrect
     QImageReader reader(path);
-    int w = reader.size().width();
-    int h = reader.size().height();
+    
+    // 增加内存限制，支持读取大图片的元数据
+    reader.setAllocationLimit(2048);
+    qDebug() << "Set QImageReader allocation limit to 2048MB for metadata reading";
+    
+    QSize originalSize = reader.size();
+    const int maxDimension = 4096;
+    int w = originalSize.width();
+    int h = originalSize.height();
+    
+    if (originalSize.width() > maxDimension || originalSize.height() > maxDimension) {
+        qDebug() << "Large image detected for metadata reading (" << originalSize.width() << "x" << originalSize.height()
+                              << "), scaling down to max dimension:" << maxDimension;
+        
+        QSize scaledSize = originalSize;
+        scaledSize.scale(maxDimension, maxDimension, Qt::KeepAspectRatio);
+        
+        admMap.insert("OriginalDimension", QString::number(w) + "x" + QString::number(h));
+        admMap.insert("OriginalWidth", QString::number(w));
+        admMap.insert("OriginalHeight", QString::number(h));
+        
+        w = scaledSize.width();
+        h = scaledSize.height();
+
+        qDebug() << "Image scaled for metadata to:" << scaledSize;
+    }
+    
     admMap.insert("Dimension", QString::number(w) + "x" + QString::number(h));
     // 记录图片宽高
     admMap.insert("Width", QString::number(w));