Allow different splash and about image

src/Gui/Icons/resource.qrc

@@ -1,6 +1,7 @@
 <RCC>
     <qresource prefix="/icons">
         <file>freecadsplash.png</file>
+        <file>freecadabout.png</file>
         <file>background.png</file>
         <file>mouse_pointer.svg</file>
         <file>Document.svg</file>

src/Gui/MainWindow.cpp

@@ -1456,6 +1456,28 @@ void MainWindow::stopSplasher(void)
     }
 }
 
+QPixmap MainWindow::aboutImage() const
+{
+    // See if we have a custom About screen image set
+    QPixmap about_image;
+    std::string about_path = App::Application::Config()["AboutImage"];
+    if (!about_path.empty()) {
+        QString path = QString::fromUtf8(about_path.c_str());
+        if (QDir(path).isRelative()) {
+            QString home = QString::fromUtf8(App::GetApplication().getHomePath());
+            path = QFileInfo(QDir(home), path).absoluteFilePath();
+        }
+        about_image.load(path);
+
+        // Now try the icon paths
+        if (about_image.isNull()) {
+            about_image = Gui::BitmapFactory().pixmap(about_path.c_str());
+        }
+    }
+
+    return about_image;
+}
+
 QPixmap MainWindow::splashImage() const
 {
     // search in the UserAppData dir as very first

src/Gui/MainWindow.h

@@ -135,6 +135,8 @@ public:
     void startSplasher(void);
     /** Stops the splasher after startup. */
     void stopSplasher(void);
+    /* The image of the About dialog, it might be empty. */
+    QPixmap aboutImage() const;
     /* The image of the splash screen of the application. */
     QPixmap splashImage() const;
     /** Shows the online documentation. */

src/Gui/Splashscreen.cpp

@@ -228,7 +228,14 @@ AboutDialog::AboutDialog(bool showLic, QWidget* parent)
     ui->setupUi(this);
     layout()->setSizeConstraint(QLayout::SetFixedSize);
     QRect rect = QApplication::primaryScreen()->availableGeometry();
-    QPixmap image = getMainWindow()->splashImage();
+
+    // See if we have a custom About screen image set
+    QPixmap image = getMainWindow()->aboutImage();
+
+    // Fallback to the splashscreen image
+    if (image.isNull()) {
+        image = getMainWindow()->splashImage();
+    }
 
     // Make sure the image is not too big
     int denom = 2;

src/Main/MainGui.cpp

@@ -176,6 +176,7 @@ int main( int argc, char ** argv )
     App::Application::Config()["CopyrightInfo"] = sBanner;
     App::Application::Config()["AppIcon"] = "freecad";
     App::Application::Config()["SplashScreen"] = "freecadsplash";
+    App::Application::Config()["AboutImage"] = "freecadabout";
     App::Application::Config()["StartWorkbench"] = "StartWorkbench";
     //App::Application::Config()["HiddenDockWindow"] = "Property editor";
     App::Application::Config()["SplashAlignment" ] = "Bottom|Left";