Simplified rotation to data level transpose

pyPhotoAlbum/commands.py

@@ -297,20 +297,89 @@ class ResizeElementCommand(Command):
 
 class RotateElementCommand(Command):
     """Command for rotating an element"""
-    
+
     def __init__(self, element: BaseLayoutElement, old_rotation: float, new_rotation: float):
         self.element = element
         self.old_rotation = old_rotation
         self.new_rotation = new_rotation
-    
+
+        # Store old position, size, and PIL rotation state
+        self.old_position = element.position
+        self.old_size = element.size
+
+        # For ImageData, store the old PIL rotation state
+        if hasattr(element, 'pil_rotation_90'):
+            self.old_pil_rotation = element.pil_rotation_90
+        else:
+            self.old_pil_rotation = None
+
     def execute(self):
-        """Rotate element to new angle"""
-        self.element.rotation = self.new_rotation
-    
+        """Rotate element by physically rotating the PIL image data"""
+        from pyPhotoAlbum.models import ImageData
+
+        # Calculate rotation delta
+        delta = (self.new_rotation - self.old_rotation) % 360
+
+        # For ImageData, rotate the actual PIL image
+        if isinstance(self.element, ImageData):
+            # Update PIL rotation counter
+            if delta == 90:
+                self.element.pil_rotation_90 = (self.element.pil_rotation_90 + 1) % 4
+            elif delta == 270:
+                self.element.pil_rotation_90 = (self.element.pil_rotation_90 + 3) % 4
+            elif delta == 180:
+                self.element.pil_rotation_90 = (self.element.pil_rotation_90 + 2) % 4
+
+            # For 90° or 270° rotations, swap dimensions
+            if delta == 90 or delta == 270:
+                w, h = self.element.size
+                x, y = self.element.position
+
+                # Swap dimensions
+                self.element.size = (h, w)
+
+                # Adjust position to keep center in same place
+                center_x = x + w / 2
+                center_y = y + h / 2
+                self.element.position = (center_x - h / 2, center_y - w / 2)
+
+            # Clear the texture so it will be reloaded with the new rotation
+            if hasattr(self.element, '_texture_id'):
+                del self.element._texture_id
+            if hasattr(self.element, '_async_load_requested'):
+                self.element._async_load_requested = False
+
+            # Keep visual rotation at 0
+            self.element.rotation = 0
+        else:
+            # For non-image elements, use old visual rotation
+            if delta == 90 or delta == 270:
+                w, h = self.element.size
+                x, y = self.element.position
+                self.element.size = (h, w)
+                center_x = x + w / 2
+                center_y = y + h / 2
+                self.element.position = (center_x - h / 2, center_y - w / 2)
+                self.element.rotation = 0
+            else:
+                self.element.rotation = self.new_rotation
+
     def undo(self):
-        """Rotate element back to old angle"""
+        """Restore element back to old state"""
+        from pyPhotoAlbum.models import ImageData
+
+        # Restore original rotation, position, and size
         self.element.rotation = self.old_rotation
-    
+        self.element.position = self.old_position
+        self.element.size = self.old_size
+
+        # For ImageData, restore PIL rotation and clear texture
+        if isinstance(self.element, ImageData) and self.old_pil_rotation is not None:
+            self.element.pil_rotation_90 = self.old_pil_rotation
+            if hasattr(self.element, '_texture_id'):
+                self.element._texture_id = None
+                self.element._async_load_requested = False
+
     def redo(self):
         """Rotate element to new angle again"""
         self.execute()

pyPhotoAlbum/mixins/element_selection.py

@@ -72,42 +72,12 @@ class ElementSelectionMixin:
                 ex, ey = element.position
                 ew, eh = element.size
 
-                # Handle rotated elements
-                if hasattr(element, 'rotation') and element.rotation != 0:
-                    # Transform click point through inverse rotation
-                    import math
-
-                    # Get element center
-                    center_x = ex + ew / 2
-                    center_y = ey + eh / 2
-
-                    # Translate to origin
-                    rel_x = page_x - center_x
-                    rel_y = page_y - center_y
-
-                    # Apply inverse rotation
-                    angle_rad = -math.radians(element.rotation)
-                    cos_a = math.cos(angle_rad)
-                    sin_a = math.sin(angle_rad)
-
-                    # Rotate the point
-                    rotated_x = rel_x * cos_a - rel_y * sin_a
-                    rotated_y = rel_x * sin_a + rel_y * cos_a
-
-                    # Check if rotated point is in unrotated bounds
-                    if (-ew / 2 <= rotated_x <= ew / 2 and
-                        -eh / 2 <= rotated_y <= eh / 2):
-                        # Store the renderer with the element for later use
-                        element._page_renderer = renderer
-                        element._parent_page = page
-                        return element
-                else:
-                    # No rotation - simple bounds check
-                    if ex <= page_x <= ex + ew and ey <= page_y <= ey + eh:
-                        # Store the renderer with the element for later use
-                        element._page_renderer = renderer
-                        element._parent_page = page
-                        return element
+                # Simple bounds check (no rotation transformation needed - images are already rotated)
+                if ex <= page_x <= ex + ew and ey <= page_y <= ey + eh:
+                    # Store the renderer with the element for later use
+                    element._page_renderer = renderer
+                    element._parent_page = page
+                    return element
 
         return None
 
@@ -147,32 +117,7 @@ class ElementSelectionMixin:
         ew = elem_w * renderer.zoom
         eh = elem_h * renderer.zoom
 
-        # Calculate center point
-        center_x = ex + ew / 2
-        center_y = ey + eh / 2
-
-        # If element is rotated, transform mouse coordinates through inverse rotation
-        test_x, test_y = x, y
-        if hasattr(self.selected_element, 'rotation') and self.selected_element.rotation != 0:
-            import math
-            # Translate mouse to origin (relative to center)
-            rel_x = x - center_x
-            rel_y = y - center_y
-
-            # Apply inverse rotation
-            angle_rad = -math.radians(self.selected_element.rotation)
-            cos_a = math.cos(angle_rad)
-            sin_a = math.sin(angle_rad)
-
-            # Rotate the point
-            rotated_x = rel_x * cos_a - rel_y * sin_a
-            rotated_y = rel_x * sin_a + rel_y * cos_a
-
-            # Translate back
-            test_x = center_x + rotated_x
-            test_y = center_y + rotated_y
-
-        # Now check handles in non-rotated coordinate system
+        # Check handles (no rotation transformation needed - images are already rotated)
         handles = {
             'nw': (ex - handle_size/2, ey - handle_size/2),
             'ne': (ex + ew - handle_size/2, ey - handle_size/2),
@@ -181,7 +126,7 @@ class ElementSelectionMixin:
         }
 
         for name, (hx, hy) in handles.items():
-            if hx <= test_x <= hx + handle_size and hy <= test_y <= hy + handle_size:
+            if hx <= x <= hx + handle_size and hy <= y <= hy + handle_size:
                 return name
 
         return None

pyPhotoAlbum/mixins/mouse_interaction.py

@@ -165,18 +165,6 @@ class MouseInteractionMixin:
                 total_dx = screen_dx / self.zoom_level
                 total_dy = screen_dy / self.zoom_level
 
-                if self.selected_element.rotation != 0:
-                    import math
-                    angle_rad = -math.radians(self.selected_element.rotation)
-                    cos_a = math.cos(angle_rad)
-                    sin_a = math.sin(angle_rad)
-
-                    rotated_dx = total_dx * cos_a - total_dy * sin_a
-                    rotated_dy = total_dx * sin_a + total_dy * cos_a
-
-                    total_dx = rotated_dx
-                    total_dy = rotated_dy
-
                 self._resize_element(total_dx, total_dy)
             else:
                 # Move mode

pyPhotoAlbum/mixins/operations/edit_ops.py

@@ -103,9 +103,9 @@ class EditOperationsMixin:
         
         cmd = RotateElementCommand(selected_element, old_rotation, new_rotation)
         self.project.history.execute(cmd)
-        
+
         self.update_view()
-        self.show_status(f"Rotated to {new_rotation}° (Ctrl+Z to undo)", 2000)
+        self.show_status(f"Rotated left (Ctrl+Z to undo)", 2000)
         print(f"Rotated element left: {old_rotation}° → {new_rotation}°")
     
     @ribbon_action(
@@ -126,9 +126,9 @@ class EditOperationsMixin:
         
         cmd = RotateElementCommand(selected_element, old_rotation, new_rotation)
         self.project.history.execute(cmd)
-        
+
         self.update_view()
-        self.show_status(f"Rotated to {new_rotation}° (Ctrl+Z to undo)", 2000)
+        self.show_status(f"Rotated right (Ctrl+Z to undo)", 2000)
         print(f"Rotated element right: {old_rotation}° → {new_rotation}°")
     
     @ribbon_action(

pyPhotoAlbum/mixins/rendering.py

@@ -129,12 +129,7 @@ class RenderingMixin:
         center_x = x + w / 2
         center_y = y + h / 2
 
-        if element.rotation != 0:
-            glPushMatrix()
-            glTranslatef(center_x, center_y, 0)
-            glRotatef(element.rotation, 0, 0, 1)
-            glTranslatef(-w / 2, -h / 2, 0)
-            x, y = 0, 0
+        # No rotation transformation needed - images are already rotated at PIL level
 
         if self.rotation_mode:
             glColor3f(1.0, 0.5, 0.0)
@@ -210,9 +205,6 @@ class RenderingMixin:
                 glVertex2f(hx, hy + handle_size)
                 glEnd()
 
-        if element.rotation != 0:
-            glPopMatrix()
-
     def _render_text_overlays(self):
         """Render text content for TextBoxData elements using QPainter overlay"""
         if not hasattr(self, '_page_renderers') or not self._page_renderers:

pyPhotoAlbum/models.py

@@ -68,6 +68,10 @@ class ImageData(BaseLayoutElement):
         # This allows correct rendering even while async loading is in progress
         self.image_dimensions = image_dimensions  # (width, height) or None
 
+        # PIL-level rotation: number of 90° rotations to apply to the loaded image
+        # This is separate from the visual rotation field (which should stay at 0)
+        self.pil_rotation_90 = 0  # 0, 1, 2, or 3 (for 0°, 90°, 180°, 270°)
+
         # If dimensions not provided and we have a path, try to extract them quickly
         if not self.image_dimensions and self.image_path:
             self._extract_dimensions_metadata()
@@ -109,28 +113,19 @@ class ImageData(BaseLayoutElement):
 
     def render(self):
         """Render the image using OpenGL"""
-        from OpenGL.GL import (glBegin, glEnd, glVertex2f, glColor3f, glColor4f, GL_QUADS, GL_LINE_LOOP, 
+        from OpenGL.GL import (glBegin, glEnd, glVertex2f, glColor3f, glColor4f, GL_QUADS, GL_LINE_LOOP,
                                glEnable, glDisable, GL_TEXTURE_2D, glBindTexture, glTexCoord2f,
-                               glGenTextures, glTexImage2D, GL_RGBA, GL_UNSIGNED_BYTE, 
+                               glGenTextures, glTexImage2D, GL_RGBA, GL_UNSIGNED_BYTE,
                                glTexParameteri, GL_TEXTURE_MIN_FILTER, GL_TEXTURE_MAG_FILTER, GL_LINEAR,
-                               glDeleteTextures, glPushMatrix, glPopMatrix, glTranslatef, glRotatef)
+                               glDeleteTextures)
         from PIL import Image
         import os
-        
+
         x, y = self.position
         w, h = self.size
-        
-        # Apply rotation if needed
-        if self.rotation != 0:
-            glPushMatrix()
-            # Translate to center of element
-            center_x = x + w / 2
-            center_y = y + h / 2
-            glTranslatef(center_x, center_y, 0)
-            glRotatef(self.rotation, 0, 0, 1)
-            glTranslatef(-w / 2, -h / 2, 0)
-            # Now render at origin (rotation pivot is at element center)
-            x, y = 0, 0
+
+        # Note: Rotation is now handled at the PIL image level, not visually
+        # The image data itself is rotated, so we render it without transformation
         
         # Try to load and render the actual image
         texture_id = None
@@ -251,10 +246,6 @@ class ImageData(BaseLayoutElement):
         glVertex2f(x + w, y + h)
         glVertex2f(x, y + h)
         glEnd()
-        
-        # Pop matrix if we pushed for rotation
-        if self.rotation != 0:
-            glPopMatrix()
 
     def serialize(self) -> Dict[str, Any]:
         """Serialize image data to dictionary"""
@@ -265,7 +256,8 @@ class ImageData(BaseLayoutElement):
             "rotation": self.rotation,
             "z_index": self.z_index,
             "image_path": self.image_path,
-            "crop_info": self.crop_info
+            "crop_info": self.crop_info,
+            "pil_rotation_90": getattr(self, 'pil_rotation_90', 0)
         }
         # Include image dimensions metadata if available
         if self.image_dimensions:
@@ -280,6 +272,23 @@ class ImageData(BaseLayoutElement):
         self.z_index = data.get("z_index", 0)
         self.image_path = data.get("image_path", "")
         self.crop_info = tuple(data.get("crop_info", (0, 0, 1, 1)))
+        self.pil_rotation_90 = data.get("pil_rotation_90", 0)
+
+        # Backwards compatibility: convert old visual rotation to PIL rotation
+        if self.pil_rotation_90 == 0 and self.rotation != 0:
+            # Old project with visual rotation - convert to PIL rotation
+            # Round to nearest 90 degrees
+            normalized_rotation = round(self.rotation / 90) * 90
+            if normalized_rotation == 90:
+                self.pil_rotation_90 = 1
+            elif normalized_rotation == 180:
+                self.pil_rotation_90 = 2
+            elif normalized_rotation == 270:
+                self.pil_rotation_90 = 3
+            # Reset visual rotation
+            self.rotation = 0
+            print(f"ImageData: Converted old visual rotation to pil_rotation_90={self.pil_rotation_90}")
+
         # Load image dimensions metadata if available
         self.image_dimensions = data.get("image_dimensions", None)
         if self.image_dimensions:
@@ -295,8 +304,22 @@ class ImageData(BaseLayoutElement):
         from OpenGL.GL import (glGenTextures, glBindTexture, glTexImage2D, GL_TEXTURE_2D,
                                glTexParameteri, GL_TEXTURE_MIN_FILTER, GL_TEXTURE_MAG_FILTER,
                                GL_LINEAR, GL_RGBA, GL_UNSIGNED_BYTE, glDeleteTextures)
+        from PIL import Image
 
         try:
+            # Apply PIL-level rotation if needed
+            if hasattr(self, 'pil_rotation_90') and self.pil_rotation_90 > 0:
+                # Rotate counter-clockwise by 90° * pil_rotation_90
+                # PIL.Image.ROTATE_90 rotates counter-clockwise
+                angle = self.pil_rotation_90 * 90
+                if angle == 90:
+                    pil_image = pil_image.transpose(Image.ROTATE_270)  # CCW 90 = rotate right
+                elif angle == 180:
+                    pil_image = pil_image.transpose(Image.ROTATE_180)
+                elif angle == 270:
+                    pil_image = pil_image.transpose(Image.ROTATE_90)  # CCW 270 = rotate left
+                print(f"ImageData: Applied PIL rotation {angle}° to {self.image_path}")
+
             # Delete old texture if it exists
             if hasattr(self, '_texture_id') and self._texture_id:
                 glDeleteTextures([self._texture_id])