1 files changed, 12 insertions, 0 deletions
diff --git a/src/core/compositor/display_software_output_surface.cpp b/src/core/compositor/display_software_output_surface.cpp
index b1a357615..218bff94a 100644
--- a/src/core/compositor/display_software_output_surface.cpp
+++ b/src/core/compositor/display_software_output_surface.cpp
@@ -67,6 +67,8 @@ public:
     void swapFrame() override;
     QImage image() override;
     float devicePixelRatio() override;
+    QSize size() override;
+    bool hasAlphaChannel() override;
 
 private:
     mutable QMutex m_mutex;
@@ -154,6 +156,16 @@ float DisplaySoftwareOutputSurface::Device::devicePixelRatio()
     return m_imageDevicePixelRatio;
 }
 
+QSize DisplaySoftwareOutputSurface::Device::size()
+{
+    return m_image.size();
+}
+
+bool DisplaySoftwareOutputSurface::Device::hasAlphaChannel()
+{
+    return m_image.format() == QImage::Format_ARGB32_Premultiplied;
+}
+
 DisplaySoftwareOutputSurface::DisplaySoftwareOutputSurface()
     : SoftwareOutputSurface(std::make_unique<Device>())
 {}