Merge pull request #15 from haganbmj/image_slice_fix_masks

fix: apply image scale after slice window to avoid mask issues

src/data/format/image.cpp

@@ -34,7 +34,7 @@ private:
 
 Rotation UnzoomedDataViewer::getRotation() const {
   if (!stylesheet) stylesheet = set->stylesheet;
-  int export_zoom = settings.stylesheetSettingsFor(set->stylesheetFor(card)).export_zoom();
+  double export_zoom = settings.stylesheetSettingsFor(set->stylesheetFor(card)).export_zoom();
   bool use_viewer_rotation = !settings.stylesheetSettingsFor(set->stylesheetFor(card)).card_normal_export();
 
   if (use_viewer_rotation) {

src/gui/image_slice_window.cpp

@@ -61,12 +61,13 @@ void ImageSlice::centerSelection() {
     }
 }
 
-Image ImageSlice::getSlice() const {
-  if (selection.width == target_size.GetWidth() && selection.height == target_size.GetHeight() && selection.x == 0 && selection.y == 0) {
+Image ImageSlice::getSlice(double scale) const {
+  wxSize scaled_target_size = target_size * scale;
+  if (selection.width == scaled_target_size.GetWidth() && selection.height == scaled_target_size.GetHeight() && selection.x == 0 && selection.y == 0) {
     // exactly the right size
     return source.GetSubImage(selection);
   }
-  Image target(target_size.GetWidth(), target_size.GetHeight(), false);
+  Image target(scaled_target_size.GetWidth(), scaled_target_size.GetHeight(), false);
   if (sharpen && sharpen_amount > 0 && sharpen_amount <= 100) {
     sharp_resample_and_clip(source, target, selection, sharpen_amount);
   } else {
@@ -195,8 +196,8 @@ void ImageSliceWindow::onOk(wxCommandEvent&) {
   EndModal(wxID_OK);
 }
 
-Image ImageSliceWindow::getImage() const {
-  return slice.getSlice();
+Image ImageSliceWindow::getImage(double scale) const {
+  return slice.getSlice(scale);
 }
 
 // ----------------------------------------------------------------------------- : ImageSliceWindow : Controls

src/gui/image_slice_window.hpp

@@ -45,7 +45,7 @@ public:
   /// Attempt to center the current constraints
   void centerSelection();
   /// Get the sliced image
-  Image getSlice() const;
+  Image getSlice(double scale = 1.0) const;
   
   // Zoom factor
   inline double zoomX() const { return target_size.GetWidth()  / (double)selection.width;  }
@@ -63,7 +63,7 @@ public:
   ImageSliceWindow(Window* parent, const Image& source, const wxSize& target_size, const AlphaMask& target_mask);
   
   /// Return the sliced image
-  Image getImage() const;
+  Image getImage(double scale) const;
   
   // --------------------------------------------------- : Data
 private:

src/gui/value/image.cpp

@@ -41,16 +41,17 @@ void ImageValueEditor::sliceImage(const Image& image) {
   AlphaMask mask;
   style().mask.getNoCache(options,mask);
   // slice
-  // Specify a desired size based on the stylesheet and a scale multiplier defined within the user's settings.
-  // Storing at a greater than 100% resolution allows for better exports >100%, but may change how images look when filters (sharpen) are applied.
-  // Additionally, this bloats the set file size as even under-resolution images are upscaled to the new minimum size.
-  RealSize desired_slice_size = RealSize(style().getSize().width * settings.internal_scale, style().getSize().height * settings.internal_scale);
-  ImageSliceWindow s(wxGetTopLevelParent(&editor()), image, desired_slice_size, mask);
+  ImageSliceWindow s(wxGetTopLevelParent(&editor()), image, style().getSize(), mask);
   // clicked ok?
   if (s.ShowModal() == wxID_OK) {
     // store the image into the set
     LocalFileName new_image_file = getLocalPackage().newFileName(field().name, settings.internal_image_extension ? _(".png") : _("")); // a new unique name in the package
-    Image img = s.getImage();
+
+    // Specify a desired size based on the stylesheet and a scale multiplier defined within the user's settings.
+    // Storing at a greater than 100% resolution allows for better exports >100%, but may change how images look when filters (sharpen) are applied.
+    // It also disrupts some of the patterns in use for doing popout planeswalkers since you have to do the math at both scales.
+    // Additionally, this bloats the set file size as even under-resolution images are upscaled to the new minimum size.
+    Image img = s.getImage(settings.internal_scale);
     img.SaveFile(getLocalPackage().nameOut(new_image_file), wxBITMAP_TYPE_PNG); // always use PNG images, see #69. Disk space is cheap anyway.
     addAction(value_action(valueP(), new_image_file));
   }