feat(iv): flip, rotate and save image

src/iv/imageviewer.cpp

@@ -520,6 +520,22 @@ ImageViewer::createActions()
     closeupAvgPixelsBox->setToolTip(closeupAvgPixelsTooltip);
     closeupAvgPixelsLabel->setToolTip(closeupAvgPixelsTooltip);
 
+
+    rotateLeftAct = new QAction(tr("&Rotate Left"), this);
+    rotateLeftAct->setShortcut(tr("Ctrl+Shift+L"));
+    connect(rotateLeftAct, SIGNAL(triggered()), this, SLOT(rotateLeft()));
+
+    rotateRightAct = new QAction(tr("&Rotate Right"), this);
+    rotateRightAct->setShortcut(tr("Ctrl+Shift+R"));
+    connect(rotateRightAct, SIGNAL(triggered()), this, SLOT(rotateRight()));
+
+    flipHorizontalAct = new QAction(tr("&Flip Horizontal"), this);
+    connect(flipHorizontalAct, SIGNAL(triggered()), this,
+            SLOT(flipHorizontal()));
+
+    flipVerticalAct = new QAction(tr("&Flip Vertical"), this);
+    connect(flipVerticalAct, SIGNAL(triggered()), this, SLOT(flipVertical()));
+
     // Connect signals to ensure closeupAvgPixelsBox value is always <= closeupPixelsBox value
     connect(closeupPixelsBox, QOverload<int>::of(&QSpinBox::valueChanged),
             [this](int value) {
@@ -780,6 +796,11 @@ ImageViewer::createMenus()
     toolsMenu->addAction(toggleAreaSampleAct);
     toolsMenu->addMenu(slideMenu);
     toolsMenu->addMenu(sortMenu);
+    toolsMenu->addSeparator();
+    toolsMenu->addAction(rotateLeftAct);
+    toolsMenu->addAction(rotateRightAct);
+    toolsMenu->addAction(flipHorizontalAct);
+    toolsMenu->addAction(flipVerticalAct);
 
     // Menus, toolbars, & status
     // Annotate
@@ -2455,3 +2476,82 @@ ImageViewer::areaSampleMode() const
 {
     return m_areaSampleMode;
 }
+
+
+void
+ImageViewer::rotateLeft()
+{
+    IvImage* img = cur();
+    if (!img)
+        return;
+
+    ImageSpec* spec = curspecmod();
+
+    int curr_orientation = spec->get_int_attribute("Orientation", 1);
+
+    if (curr_orientation >= 1 && curr_orientation <= 8) {
+        static int next_orientation[] = { 0, 8, 5, 6, 7, 4, 1, 2, 3 };
+        curr_orientation              = next_orientation[curr_orientation];
+        spec->attribute("Orientation", curr_orientation);
+    }
+    displayCurrentImage();
+}
+
+
+void
+ImageViewer::rotateRight()
+{
+    IvImage* img = cur();
+    if (!img)
+        return;
+
+    ImageSpec* spec      = curspecmod();
+    int curr_orientation = spec->get_int_attribute("Orientation", 1);
+
+    if (curr_orientation >= 1 && curr_orientation <= 8) {
+        static int next_orientation[] = { 0, 6, 7, 8, 5, 2, 3, 4, 1 };
+        curr_orientation              = next_orientation[curr_orientation];
+        spec->attribute("Orientation", curr_orientation);
+    }
+    displayCurrentImage();
+}
+
+
+void
+ImageViewer::flipHorizontal()
+{
+    IvImage* img = cur();
+    if (!img)
+        return;
+
+    ImageSpec* spec = curspecmod();
+
+    int curr_orientation = spec->get_int_attribute("Orientation", 1);
+
+    if (curr_orientation >= 1 && curr_orientation <= 8) {
+        static int next_orientation[] = { 0, 2, 1, 4, 3, 6, 5, 8, 7 };
+        curr_orientation              = next_orientation[curr_orientation];
+        spec->attribute("Orientation", curr_orientation);
+    }
+    displayCurrentImage();
+}
+
+
+void
+ImageViewer::flipVertical()
+{
+    IvImage* img = cur();
+    if (!img)
+        return;
+
+    ImageSpec* spec = curspecmod();
+
+    int curr_orientation = spec->get_int_attribute("Orientation", 1);
+
+    if (curr_orientation >= 1 && curr_orientation <= 8) {
+        static int next_orientation[] = { 0, 4, 3, 2, 1, 8, 7, 6, 5 };
+        curr_orientation              = next_orientation[curr_orientation];
+        spec->attribute("Orientation", curr_orientation);
+    }
+    displayCurrentImage();
+}

src/iv/imageviewer.h

@@ -219,6 +219,14 @@ class ImageViewer final : public QMainWindow {
         return img ? &img->spec() : NULL;
     }
 
+    /// Return a modifiable ref to the current image spec, or NULL if there is no
+    /// current image.
+    ImageSpec* curspecmod(void) const
+    {
+        IvImage* img = cur();
+        return img ? &img->specmod() : NULL;
+    }
+
     bool pixelviewOn(void) const
     {
         return showPixelviewWindowAct && showPixelviewWindowAct->isChecked();
@@ -334,6 +342,11 @@ private slots:
     void editPreferences();      ///< Edit viewer preferences
     void toggleAreaSample();     ///< Use area probe
 
+    void rotateLeft();
+    void rotateRight();
+    void flipHorizontal();
+    void flipVertical();
+
     void useOCIOAction(bool checked);
     void ocioColorSpaceAction();
     void ocioDisplayViewAction();
@@ -404,6 +417,8 @@ private slots:
     QAction* showPixelviewWindowAct;
     QAction* toggleAreaSampleAct;
     QAction* toggleWindowGuidesAct;
+    QAction *rotateLeftAct, *rotateRightAct, *flipHorizontalAct,
+        *flipVerticalAct;
     QMenu *fileMenu, *editMenu, /**imageMenu,*/ *viewMenu, *toolsMenu,
         *helpMenu;
     QMenu* openRecentMenu;