Add a view-only iOS test app using tiled rendering

I had to add some horrible hacks to make sure the test doc has been
loaded into a Writer shell before retrieving its size and being able
to render it. Obviously some better solution is needed. But this is
just a testbed to get some profiling data.

The app is built using an Xcode project, and in gbuild through a
custom target based on the MobileLibreOffice one. Setting up the
various files used (or not used...) at run-time should really be
factored out from the CustomTarget files.

Change-Id: I1711b0cae9d28a09b73476b2d37d98b1820c9943

2 files changed, 27 insertions, 1 deletions

diff --git a/vcl/quartz/salgdicommon.cxx b/vcl/quartz/salgdicommon.cxx
index 75fea3f9738e..6f96a6c7dcc0 100644
--- a/vcl/quartz/salgdicommon.cxx
+++ b/vcl/quartz/salgdicommon.cxx
@@ -293,6 +293,13 @@ static inline void alignLinePoint( const SalPoint* i_pIn, float& o_fX, float& o_
 
 void AquaSalGraphics::copyBits( const SalTwoRect& rPosAry, SalGraphics *pSrcGraphics )
 {
+#ifdef IOS
+    // Horrible horrible this is all crack, mxLayer is always NULL on iOS,
+    // all this stuff should be rewritten anyway for iOS
+    if( !mxLayer )
+        return;
+#endif
+
     if( !pSrcGraphics )
     {
         pSrcGraphics = this;
@@ -452,6 +459,11 @@ void AquaSalGraphics::ApplyXorContext()
 void AquaSalGraphics::copyArea( long nDstX, long nDstY,long nSrcX, long nSrcY,
                                 long nSrcWidth, long nSrcHeight, sal_uInt16 /*nFlags*/ )
 {
+#ifdef IOS
+    if( !mxLayer )
+        return;
+#endif
+
     ApplyXorContext();
 
     DBG_ASSERT( mxLayer!=NULL, "AquaSalGraphics::copyArea() for non-layered graphics" );
diff --git a/vcl/quartz/salvd.cxx b/vcl/quartz/salvd.cxx
index 7b041b9dbf56..07753bc8b800 100644
--- a/vcl/quartz/salvd.cxx
+++ b/vcl/quartz/salvd.cxx
@@ -69,9 +69,23 @@ AquaSalVirtualDevice::AquaSalVirtualDevice( AquaSalGraphics* pGraphic, long nDX,
     if( pGraphic && pData && pData->rCGContext )
     {
         // Create virtual device based on existing SystemGraphicsData
-        // We ignore nDx and nDY, as the desired size comes from the SystemGraphicsData
+        // We ignore nDx and nDY, as the desired size comes from the SystemGraphicsData.
+        // WTF does the above mean, SystemGraphicsData has no size field(s).
         mbForeignContext = true;        // the mxContext is from pData
         mpGraphics = new AquaSalGraphics( /*pGraphic*/ );
+#ifdef IOS
+        // Note: we should *not* create a CGLayer and assign it to
+        // mxLayer here. Don't confuse CGLayer and CALayer. A CGLayer
+        // is basically a fancy off-screen bitmap not related to
+        // anything being displayed at all. The CGContext passed in
+        // here refers to something actively part of the compositor
+        // stack and being dislayed on the device, and *there*
+        // CALayers are involved, sure. The use of mxLayer in this
+        // code is for "traditional" LO virtual devices, off-screen
+        // bitmaps. I think. On the other hand, the use of
+        // VirtualDevice with a "foreign" CGContext for OS X is
+        // actually dead code...
+#endif
         mpGraphics->SetVirDevGraphics( mxLayer, pData->rCGContext );
     }
     else