Fix transformation mode for layers (#998)

* Fix transformation mode for layers

Resolve #997

* always use smooth transform resampling for stretched images

* Used fixed frame size

* Run Clang Format over file

---------

Co-authored-by: in1tiate <32779090+in1tiate@users.noreply.github.com>
Co-authored-by: Salanto <62221668+Salanto@users.noreply.github.com>
Co-authored-by: stonedDiscord <Tukz@gmx.de>

1 files changed, 6 insertions, 4 deletions

diff --git a/src/animationlayer.cpp b/src/animationlayer.cpp
index 175ce9ae..9e771246 100644
--- a/src/animationlayer.cpp
+++ b/src/animationlayer.cpp
@@ -229,6 +229,7 @@ void AnimationLayer::calculateFrameGeometry()
 {
   m_mask_rect = QRect();
   m_scaled_frame_size = QSize();
+  m_transformation_mode = m_transformation_mode_hint;
 
   QSize widget_size = size();
   if (!widget_size.isValid() || !m_frame_size.isValid())
@@ -239,6 +240,7 @@ void AnimationLayer::calculateFrameGeometry()
   if (m_stretch_to_fit)
   {
     m_scaled_frame_size = widget_size;
+    m_transformation_mode = Qt::SmoothTransformation;
   }
   else
   {
@@ -251,11 +253,11 @@ void AnimationLayer::calculateFrameGeometry()
 
     double scale = double(widget_size.height()) / double(m_scaled_frame_size.height());
     m_scaled_frame_size *= scale;
+  }
 
-    if (m_transformation_mode_hint == Qt::FastTransformation)
-    {
-      m_transformation_mode = scale < 1.0 ? Qt::SmoothTransformation : Qt::FastTransformation;
-    }
+  if (m_transformation_mode_hint == Qt::FastTransformation)
+  {
+    m_transformation_mode = widget_size.height() < m_frame_size.height() ? Qt::SmoothTransformation : Qt::FastTransformation;
   }
 
   displayCurrentFrame();