app_server: do not pass BAffineTransform as-is over server link

BAffineTransform is not POD type and contains vtable. Reading it from
byte stream as-is will cause vtable corruption.

Change-Id: I1371444444ffa47f77a88f5f82b3fe6ea031b14c
Reviewed-on: https://review.haiku-os.org/c/haiku/+/9660
Reviewed-by: waddlesplash <[email protected]>
Tested-by: Commit checker robot <[email protected]>

headers/private/app/LinkReceiver.h

@@ -11,6 +11,7 @@
 #define _LINK_RECEIVER_H
 
 
+#include <AffineTransform.h>
 #include <OS.h>
 
 
@@ -42,6 +43,8 @@ class LinkReceiver {
 		status_t ReadRegion(BRegion* region);
 		status_t ReadShape(BShape* shape);
 		status_t ReadGradient(BGradient** gradient);
+		status_t ReadAffineTransform(BAffineTransform *transform)
+			{ return Read(&transform->sx, sizeof(double) * 6); }
 
 		template <class Type> status_t Read(Type *data)
 			{ return Read(data, sizeof(Type)); }

headers/private/app/LinkSender.h

@@ -11,6 +11,7 @@
 #define _LINK_SENDER_H
 
 
+#include <AffineTransform.h>
 #include <OS.h>
 
 
@@ -43,6 +44,11 @@ class LinkSender {
 		status_t AttachRegion(const BRegion& region);
 		status_t AttachShape(BShape& shape);
 		status_t AttachGradient(const BGradient& gradient);
+		status_t AttachAffineTransform(const BAffineTransform& transform)
+		{
+			return Attach(&transform.sx, sizeof(double) * 6);
+		}
+
 		template <class Type> status_t Attach(const Type& data)
 		{
 			return Attach(&data, sizeof(Type));

headers/private/app/ServerLink.h

@@ -58,6 +58,7 @@ public:
 			status_t			AttachRegion(const BRegion& region);
 			status_t			AttachShape(BShape& shape);
 			status_t			AttachGradient(const BGradient& gradient);
+			status_t			AttachAffineTransform(const BAffineTransform& transform);
 
 			template <class Type>
 			status_t			Attach(const Type& data);
@@ -79,6 +80,7 @@ public:
 			status_t			ReadRegion(BRegion* region);
 			status_t			ReadShape(BShape* shape);
 			status_t			ReadGradient(BGradient** _gradient);
+			status_t			ReadAffineTransform(BAffineTransform* transform);
 
 			template <class Type>
 			status_t			Read(Type* data);
@@ -189,6 +191,13 @@ ServerLink::AttachGradient(const BGradient& gradient)
 }
 
 
+inline status_t
+ServerLink::AttachAffineTransform(const BAffineTransform& transform)
+{
+	return fSender->AttachAffineTransform(transform);
+}
+
+
 template<class Type> status_t
 ServerLink::Attach(const Type& data)
 {
@@ -276,6 +285,13 @@ ServerLink::ReadGradient(BGradient** _gradient)
 }
 
 
+inline status_t
+ServerLink::ReadAffineTransform(BAffineTransform* transform)
+{
+	return fReceiver->ReadAffineTransform(transform);
+}
+
+
 template <class Type> status_t
 ServerLink::Read(Type* data)
 {