1 files changed, 32 insertions, 11 deletions
diff --git a/include/vcl/virdev.hxx b/include/vcl/virdev.hxx
index 06121aca050a..f608b5797844 100644
--- a/include/vcl/virdev.hxx
+++ b/include/vcl/virdev.hxx
@@ -50,12 +50,12 @@ private:
     VclPtr<VirtualDevice>  mpNext;
     sal_uInt16          mnBitCount;
     bool                mbScreenComp;
-    DeviceFormat        meFormat;
-    DeviceFormat        meAlphaFormat;
+    const DeviceFormat  meFormat;
+    const DeviceFormat  meAlphaFormat;
     RefDevMode          meRefDevMode;
     bool                mbForceZeroExtleadBug;
 
-    SAL_DLLPRIVATE void ImplInitVirDev( const OutputDevice* pOutDev, long nDX, long nDY, DeviceFormat eFormat, const SystemGraphicsData *pData = nullptr );
+    SAL_DLLPRIVATE void ImplInitVirDev( const OutputDevice* pOutDev, long nDX, long nDY, const SystemGraphicsData *pData = nullptr );
     SAL_DLLPRIVATE bool InnerImplSetOutputSizePixel( const Size& rNewSize, bool bErase,
                                                      sal_uInt8* pBuffer );
     SAL_DLLPRIVATE bool ImplSetOutputSizePixel( const Size& rNewSize, bool bErase,
@@ -74,6 +74,24 @@ protected:
     virtual bool AcquireGraphics() const override;
     virtual void ReleaseGraphics( bool bRelease = true ) override;
 
+    /** Create a virtual device of size 1x1
+
+        @param pCompDev
+        The generated vdev will be compatible to this device.
+        If it's the nullptr, it uses Application::GetDefaultDevice().
+
+        @param eFormat
+        Device format of the generated virtual device. Use DeviceFormat::DEFAULT here, to
+        indicate: take default screen depth. Only DeviceFormat::BITMASK
+        is the other possibility to denote a binary mask.
+
+        @param eAlphaFormat
+        Device format of the generated virtual device. Use DeviceFormat::DEFAULT here, to
+        indicate: take default screen depth. Only DeviceFormat::BITMASK
+        is the other possibility to denote a binary mask.
+     */
+    explicit VirtualDevice(const OutputDevice* pCompDev, DeviceFormat eFormat, DeviceFormat eAlphaFormat);
+
 public:
 
     /** Create a virtual device of size 1x1
@@ -83,7 +101,8 @@ public:
         indicate: take default screen depth. Only DeviceFormat::BITMASK
         is the other possibility to denote a binary mask.
      */
-    explicit            VirtualDevice(DeviceFormat eFormat = DeviceFormat::DEFAULT);
+    explicit VirtualDevice(DeviceFormat eFormat = DeviceFormat::DEFAULT)
+        : VirtualDevice(nullptr, eFormat, DeviceFormat::NONE) {}
 
     /** Create a virtual device of size 1x1
 
@@ -95,8 +114,9 @@ public:
         indicate: take default screen depth. Only DeviceFormat::BITMASK
         is the other possibility to denote a binary mask.
      */
-     explicit           VirtualDevice(const OutputDevice& rCompDev,
-                                      DeviceFormat eFormat = DeviceFormat::DEFAULT);
+    explicit VirtualDevice(const OutputDevice& rCompDev,
+                           DeviceFormat eFormat = DeviceFormat::DEFAULT)
+        : VirtualDevice(&rCompDev, eFormat, DeviceFormat::NONE) {}
 
     /** Create a virtual device  of size 1x1 with alpha channel
 
@@ -113,15 +133,16 @@ public:
         indicate: take default screen depth. Only DeviceFormat::BITMASK
         is the other possibility to denote a binary mask.
      */
-     explicit           VirtualDevice( const OutputDevice& rCompDev,
-                                       DeviceFormat eFormat, DeviceFormat eAlphaFormat);
+    explicit VirtualDevice(const OutputDevice& rCompDev,
+                           DeviceFormat eFormat, DeviceFormat eAlphaFormat)
+        : VirtualDevice(&rCompDev, eFormat, eAlphaFormat) {}
 
     /** Create a virtual device using an existing system dependent device or graphics context
         Any rendering will happen directly on the context and not on any intermediate bitmap.
         Note: This might not be supported on all platforms !
-    */
-    explicit            VirtualDevice(const SystemGraphicsData *pData, const Size &rSize,
-                                      DeviceFormat eFormat);
+     */
+    explicit VirtualDevice(const SystemGraphicsData *pData, const Size &rSize,
+                           DeviceFormat eFormat);
 
     virtual             ~VirtualDevice() override;
     virtual void        dispose() override;