macOS: store VirtualDevice size in an instance variable

Change-Id: Id0a7317e9aed4b0222affb7292f6a3a44af74040
Reviewed-on: https://gerrit.libreoffice.org/72438
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

vcl/inc/quartz/salvd.h

@@ -44,6 +44,9 @@ private:
     CGLayerRef mxLayer;              // Quartz layer
     AquaSalGraphics* mpGraphics;     // current VirDev graphics
 
+    long mnWidth;
+    long mnHeight;
+
     void Destroy();
 
 public:
@@ -54,8 +57,15 @@ public:
     virtual void                    ReleaseGraphics( SalGraphics* pGraphics ) override;
     virtual bool                    SetSize( long nNewDX, long nNewDY ) override;
 
-    virtual long GetWidth() const override;
-    virtual long GetHeight() const override;
+    long GetWidth() const override
+    {
+        return mnWidth;
+    }
+
+    long GetHeight() const override
+    {
+        return mnHeight;
+    }
 };
 
 #endif // INCLUDED_VCL_INC_QUARTZ_SALVD_H

vcl/quartz/salvd.cxx

@@ -68,6 +68,8 @@ AquaSalVirtualDevice::AquaSalVirtualDevice( AquaSalGraphics* pGraphic, long &nDX
   , mxBitmapContext( nullptr )
   , mnBitmapDepth( 0 )
   , mxLayer( nullptr )
+  , mnWidth(0)
+  , mnHeight(0)
 {
     SAL_INFO( "vcl.virdev", "AquaSalVirtualDevice::AquaSalVirtualDevice() this=" << this
               << " size=(" << nDX << "x" << nDY << ") bitcount=" << static_cast<int>(eFormat) <<
@@ -228,6 +230,9 @@ bool AquaSalVirtualDevice::SetSize( long nDX, long nDY )
 
     Destroy();
 
+    mnWidth = nDX;
+    mnHeight = nDY;
+
     // create a Quartz layer matching to the intended virdev usage
     CGContextRef xCGContext = nullptr;
     if( mnBitmapDepth && (mnBitmapDepth < 16) )
@@ -305,16 +310,4 @@ bool AquaSalVirtualDevice::SetSize( long nDX, long nDY )
     return (mxLayer != nullptr);
 }
 
-long AquaSalVirtualDevice::GetWidth() const
-{
-    const CGSize aSize = CGLayerGetSize( mxLayer );
-    return aSize.width;
-}
-
-long AquaSalVirtualDevice::GetHeight() const
-{
-    const CGSize aSize = CGLayerGetSize( mxLayer );
-    return aSize.height;
-}
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */