revert: refactor: improve image loading logic in image_item for better memory performance

src/image_item.cpp

@@ -1,10 +1,11 @@
 /*
  * @Author: Uyanide pywang0608@foxmail.com
  * @Date: 2025-11-30 20:32:27
- * @LastEditTime: 2026-02-07 07:13:49
+ * @LastEditTime: 2026-02-07 07:26:30
  * @Description: Image item widget for displaying an image.
  */
 #include "image_item.h"
+#include <qimage.h>
 
 #include <QImageReader>
 
@@ -14,10 +15,10 @@ using namespace GeneralLogger;
 
 ImageData* ImageData::create(const QString& p, const int initWidth, const int initHeight) {
     ImageData* data = new ImageData(p);
+    data->image     = new QImage();
 
     // Use QImageReader for better performance
     QImageReader reader(p);
-    reader.setAutoTransform(true);
     if (!reader.canRead()) {
         warn(QString("Failed to load image from path: %1").arg(p));
         delete data;
@@ -28,7 +29,7 @@ ImageData* ImageData::create(const QString& p, const int initWidth, const int in
     const QSize originalSize = reader.size();
 
     // Scale the image to fit the target size while maintaining aspect ratio
-    if (originalSize.isValid() && reader.supportsOption(QImageIOHandler::ScaledSize)) {
+    if (originalSize.isValid()) {
         double widthRatio  = (double)targetSize.width() / originalSize.width();
         double heightRatio = (double)targetSize.height() / originalSize.height();
         double scaleFactor = std::max(widthRatio, heightRatio);
@@ -37,22 +38,19 @@ ImageData* ImageData::create(const QString& p, const int initWidth, const int in
         reader.setScaledSize(scaledSize);
     }
 
-    QImage tempImage;
-    if (!reader.read(&tempImage)) {
+    if (!reader.read(data->image)) {
         warn(QString("Failed to load image from path: %1").arg(p));
         delete data;
         return nullptr;
     }
 
     // Crop to target size if necessary
-    if (tempImage.size() != targetSize) {
-        int x        = (tempImage.width() - targetSize.width()) / 2;
-        int y        = (tempImage.height() - targetSize.height()) / 2;
-        tempImage = tempImage.copy(x, y, targetSize.width(), targetSize.height());
+    if (data->image->size() != targetSize) {
+        int x        = (data->image->width() - targetSize.width()) / 2;
+        int y        = (data->image->height() - targetSize.height()) / 2;
+        *data->image = data->image->copy(x, y, targetSize.width(), targetSize.height());
     }
 
-    data->image = new QImage(std::move(tempImage));
-
     return data;
 }