Massage ifdefs etc for iOS to avoid undefineds

I think it's best to not use cairo on iOS, even if we do use it on
Android. We probably want to use native APIs for the functionality
that cairo would provide. Just like we do on OS X.

No idea whether the resulting TiledLibreOffice will still work like it
used to in May last year, when I last tried.

Change-Id: Ie15cad6918d7a66e2aff7faabfcade7f3246b060

vcl/Library_vcl.mk

@@ -534,14 +534,17 @@ endif
 endif
 
 vcl_headless_code= \
-    vcl/headless/svpbmp \
-    vcl/headless/svpdummies \
     vcl/headless/svpframe \
-    vcl/headless/svpgdi \
+    $(call gb_Helper_optional,CAIRO, \
+	    vcl/headless/svpbmp \
+		vcl/headless/svpgdi \
+	    vcl/headless/svpdata) \
+    vcl/headless/svpdummies \
     vcl/headless/svpinst \
-    vcl/headless/svpdata \
     vcl/headless/svpvd \
     vcl/unx/generic/app/gendisp \
+    vcl/unx/generic/app/geninst \
+    vcl/unx/generic/app/gensys \
 
 vcl_headless_freetype_code=\
     vcl/headless/svpprn \
@@ -568,8 +571,6 @@ vcl_headless_freetype_code=\
     vcl/unx/generic/print/genprnpsp \
     vcl/unx/generic/print/prtsetup \
     vcl/unx/generic/print/text_gfx \
-    vcl/unx/generic/app/gensys \
-    vcl/unx/generic/app/geninst \
 
 ifeq ($(USING_X11),TRUE)
 $(eval $(call gb_Library_add_exception_objects,vcl,\

vcl/headless/svpbmp.cxx

@@ -17,8 +17,6 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef IOS
-
 #include <sal/config.h>
 
 #include <cstring>
@@ -267,6 +265,4 @@ bool SvpSalBitmap::Replace( const ::Color& /*rSearchColor*/, const ::Color& /*rR
     return false;
 }
 
-#endif
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

vcl/headless/svpgdi.cxx

@@ -20,9 +20,7 @@
 #include "headless/svpgdi.hxx"
 #include "headless/svpbmp.hxx"
 #include "headless/svpframe.hxx"
-#ifndef IOS
 #include "headless/svpcairotextrender.hxx"
-#endif
 #include "saldatabasic.hxx"
 
 #include <vcl/sysdata.hxx>
@@ -87,8 +85,6 @@ namespace
     }
 }
 
-#ifndef IOS
-
 bool SvpSalGraphics::blendBitmap( const SalTwoRect&, const SalBitmap& /*rBitmap*/ )
 {
     SAL_WARN("vcl.gdi", "unsupported SvpSalGraphics::blendBitmap case");
@@ -312,8 +308,6 @@ bool SvpSalGraphics::drawTransformedBitmap(
     return true;
 }
 
-#endif
-
 void SvpSalGraphics::clipRegion(cairo_t* cr)
 {
     RectangleVector aRectangles;
@@ -396,8 +390,6 @@ void SvpSalGraphics::GetResolution( sal_Int32& rDPIX, sal_Int32& rDPIY )
     rDPIX = rDPIY = 96;
 }
 
-#ifndef IOS
-
 sal_uInt16 SvpSalGraphics::GetBitCount() const
 {
     if (CAIRO_FORMAT_A1 == cairo_image_surface_get_format(m_pSurface))
@@ -1219,8 +1211,6 @@ void SvpSalGraphics::invert(sal_uInt32 nPoints, const SalPoint* pPtAry, SalInver
     invert(aPoly, nFlags);
 }
 
-#endif
-
 bool SvpSalGraphics::drawEPS( long, long, long, long, void*, sal_uLong )
 {
     return false;
@@ -1395,8 +1385,6 @@ css::uno::Any SvpSalGraphics::GetNativeSurfaceHandle(cairo::SurfaceSharedPtr& /*
 
 #endif // ENABLE_CAIRO_CANVAS
 
-#ifndef IOS
-
 SystemGraphicsData SvpSalGraphics::GetGraphicsData() const
 {
     return SystemGraphicsData();
@@ -1413,6 +1401,4 @@ bool SvpSalGraphics::supportsOperation(OutDevSupportType eType) const
     return false;
 }
 
-#endif
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

vcl/headless/svpinst.cxx

@@ -62,7 +62,7 @@ bool SvpSalInstance::isFrameAlive( const SalFrame* pFrame ) const
 
 SvpSalInstance* SvpSalInstance::s_pDefaultInstance = nullptr;
 
-#ifndef ANDROID
+#if !defined(ANDROID) && !defined(IOS)
 
 static void atfork_child()
 {
@@ -82,11 +82,13 @@ SvpSalInstance::SvpSalInstance( SalYieldMutex *pMutex ) :
     m_aTimeout.tv_usec      = 0;
     m_nTimeoutMS            = 0;
 
+#ifndef IOS
     m_pTimeoutFDS[0] = m_pTimeoutFDS[1] = -1;
     CreateWakeupPipe(true);
+#endif
     if( s_pDefaultInstance == nullptr )
         s_pDefaultInstance = this;
-#ifndef ANDROID
+#if !defined(ANDROID) && !defined(IOS)
     pthread_atfork(nullptr, nullptr, atfork_child);
 #endif
 }
@@ -95,10 +97,13 @@ SvpSalInstance::~SvpSalInstance()
 {
     if( s_pDefaultInstance == this )
         s_pDefaultInstance = nullptr;
-
+#ifndef IOS
     CloseWakeupPipe(true);
+#endif
 }
 
+#ifndef IOS
+
 void SvpSalInstance::CloseWakeupPipe(bool log)
 {
     if (m_pTimeoutFDS[0] != -1)
@@ -158,6 +163,8 @@ void SvpSalInstance::CreateWakeupPipe(bool log)
     }
 }
 
+#endif
+
 void SvpSalInstance::PostEvent(const SalFrame* pFrame, ImplSVEvent* pData, SalEvent nEvent)
 {
     {
@@ -206,7 +213,9 @@ void SvpSalInstance::deregisterFrame( SalFrame* pFrame )
 
 void SvpSalInstance::Wakeup()
 {
+#ifndef IOS
     OSL_VERIFY(write (m_pTimeoutFDS[1], "", 1) == 1);
+#endif
 }
 
 bool SvpSalInstance::CheckTimeout( bool bExecuteTimers )

vcl/ios/dummies.cxx

@@ -124,4 +124,9 @@ void SalGenericInstance::jobEndedPrinterUpdate()
 {
 }
 
+bool AquaSalGraphics::drawEPS( long, long, long, long, void*, sal_uLong )
+{
+    return false;
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

vcl/quartz/salgdicommon.cxx

@@ -1544,10 +1544,9 @@ SalColor AquaSalGraphics::getPixel( long nX, long nY )
     return nSalColor;
 }
 
-#ifndef IOS
-
 void AquaSalGraphics::GetResolution( sal_Int32& rDPIX, sal_Int32& rDPIY )
 {
+#ifndef IOS
     if( !mnRealDPIY )
     {
         initResolution( (mbWindow && mpFrame) ? mpFrame->getNSWindow() : nil );
@@ -1555,9 +1554,10 @@ void AquaSalGraphics::GetResolution( sal_Int32& rDPIX, sal_Int32& rDPIY )
 
     rDPIX = mnRealDPIX;
     rDPIY = mnRealDPIY;
-}
-
+#else
+    rDPIX = rDPIY = 200; // FIXME
 #endif
+}
 
 void AquaSalGraphics::ImplDrawPixel( long nX, long nY, const RGBAColor& rColor )
 {