From 4040f58af6d2d8ce8c25b19e47602d1ca1853796 Mon Sep 17 00:00:00 2001
From: Pablo Santana <pablosantanatorres@gmail.com>
Date: Sun, 2 Feb 2025 02:27:49 +0100
Subject: [PATCH] Added opacity change instead of blur for background image

---
 src/qt_gui/game_grid_frame.cpp |  2 +-
 src/qt_gui/game_list_frame.cpp |  2 +-
 src/qt_gui/game_list_utils.h   | 25 +++++++++++++++++++++++++
 3 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/src/qt_gui/game_grid_frame.cpp b/src/qt_gui/game_grid_frame.cpp
index d719ac878..859a4867e 100644
--- a/src/qt_gui/game_grid_frame.cpp
+++ b/src/qt_gui/game_grid_frame.cpp
@@ -150,7 +150,7 @@ void GameGridFrame::SetGridBackgroundImage(int row, int column) {
         backgroundImage = QImage(blurredPic1PathQt);
         if (backgroundImage.isNull()) {
             QImage image(pic1Path);
-            backgroundImage = m_game_list_utils.BlurImage(image, image.rect(), 16);
+            backgroundImage = m_game_list_utils.ChangeImageOpacity(image, image.rect(), 0.5);
 
             std::filesystem::path img_path =
                 Common::FS::GetUserPath(Common::FS::PathType::MetaDataDir) /
diff --git a/src/qt_gui/game_list_frame.cpp b/src/qt_gui/game_list_frame.cpp
index f2d08f578..b871f47b5 100644
--- a/src/qt_gui/game_list_frame.cpp
+++ b/src/qt_gui/game_list_frame.cpp
@@ -177,7 +177,7 @@ void GameListFrame::SetListBackgroundImage(QTableWidgetItem* item) {
     backgroundImage = QImage(blurredPic1PathQt);
     if (backgroundImage.isNull()) {
         QImage image(pic1Path);
-        backgroundImage = m_game_list_utils.BlurImage(image, image.rect(), 16);
+        backgroundImage = m_game_list_utils.ChangeImageOpacity(image, image.rect(), 0.5);
 
         std::filesystem::path img_path =
             Common::FS::GetUserPath(Common::FS::PathType::MetaDataDir) /
diff --git a/src/qt_gui/game_list_utils.h b/src/qt_gui/game_list_utils.h
index 581a8a55f..1a8860c1e 100644
--- a/src/qt_gui/game_list_utils.h
+++ b/src/qt_gui/game_list_utils.h
@@ -201,4 +201,29 @@ public:
 
         return result;
     }
+
+    QImage ChangeImageOpacity(const QImage& image, const QRect& rect, float opacity) {
+        // Convert to ARGB32 format to ensure alpha channel support
+        QImage result = image.convertToFormat(QImage::Format_ARGB32);
+        
+        // Ensure opacity is between 0 and 1
+        opacity = std::clamp(opacity, 0.0f, 1.0f);
+        
+        // Convert opacity to integer alpha value (0-255)
+        int alpha = static_cast<int>(opacity * 255);
+        
+        // Process only the specified rectangle area
+        for (int y = rect.top(); y <= rect.bottom(); ++y) {
+            QRgb* line = reinterpret_cast<QRgb*>(result.scanLine(y));
+            for (int x = rect.left(); x <= rect.right(); ++x) {
+                // Get current pixel
+                QRgb pixel = line[x];
+                // Keep RGB values, but modify alpha while preserving relative transparency
+                int newAlpha = (qAlpha(pixel) * alpha) / 255;
+                line[x] = qRgba(qRed(pixel), qGreen(pixel), qBlue(pixel), newAlpha);
+            }
+        }
+        
+        return result;
+    }
 };