RemoteDesktop: Implement support for BAffineTransform.

It is currently somewhat broken client side though.

src/apps/remotedesktop/RemoteView.cpp

@@ -699,6 +699,16 @@ RemoteView::_DrawThread()
 				break;
 			}
 
+			case RP_SET_TRANSFORM:
+			{
+				BAffineTransform transform;
+				if (message.ReadTransform(transform) != B_OK)
+					continue;
+
+				offscreen->SetTransform(transform);
+				break;
+			}
+
 			case RP_SET_PATTERN:
 			{
 				if (message.Read(pattern) != B_OK)

src/servers/app/drawing/interface/remote/RemoteDrawingEngine.cpp

@@ -114,6 +114,7 @@ RemoteDrawingEngine::SetDrawState(const DrawState* state, int32 xOffset,
 	SetHighColor(state->HighColor());
 	SetLowColor(state->LowColor());
 	SetFont(state->Font());
+	SetTransform(state->CombinedTransform());
 
 	RemoteMessage message(NULL, fHWInterface->SendBuffer());
 	message.Start(RP_SET_OFFSETS);
@@ -268,6 +269,21 @@ RemoteDrawingEngine::SetFont(const DrawState* state)
 }
 
 
+void
+RemoteDrawingEngine::SetTransform(const BAffineTransform& transform)
+{
+	if (fState.Transform() == transform)
+		return;
+
+	fState.SetTransform(transform);
+
+	RemoteMessage message(NULL, fHWInterface->SendBuffer());
+	message.Start(RP_SET_TRANSFORM);
+	message.Add(fToken);
+	message.AddTransform(transform);
+}
+
+
 // #pragma mark -
 
 

src/servers/app/drawing/interface/remote/RemoteDrawingEngine.h

@@ -55,6 +55,7 @@ public:
 									alpha_function alphaFunc);
 	virtual	void				SetFont(const ServerFont& font);
 	virtual	void				SetFont(const DrawState* state);
+	virtual	void				SetTransform(const BAffineTransform& transform);
 
 	// drawing functions
 	virtual	void				InvertRect(BRect rect);

src/servers/app/drawing/interface/remote/RemoteMessage.cpp

@@ -254,6 +254,24 @@ RemoteMessage::AddGradient(const BGradient& gradient)
 }
 
 
+void
+RemoteMessage::AddTransform(const BAffineTransform& transform)
+{
+	bool isIdentity = transform.IsIdentity();
+	Add(isIdentity);
+
+	if (isIdentity)
+		return;
+
+	Add(transform.sx);
+	Add(transform.shy);
+	Add(transform.shx);
+	Add(transform.sy);
+	Add(transform.tx);
+	Add(transform.ty);
+}
+
+
 status_t
 RemoteMessage::ReadString(char** _string, size_t& _length)
 {
@@ -515,6 +533,28 @@ RemoteMessage::ReadGradient(BGradient** _gradient)
 }
 
 
+status_t
+RemoteMessage::ReadTransform(BAffineTransform& transform)
+{
+	bool isIdentity;
+	status_t result = Read(isIdentity);
+	if (result != B_OK)
+		return result;
+
+	if (isIdentity) {
+		transform = BAffineTransform();
+		return B_OK;
+	}
+
+	Read(transform.sx);
+	Read(transform.shy);
+	Read(transform.shx);
+	Read(transform.sy);
+	Read(transform.tx);
+	return Read(transform.ty);
+}
+
+
 status_t
 RemoteMessage::ReadArrayLine(BPoint& startPoint, BPoint& endPoint,
 	rgb_color& color)

src/servers/app/drawing/interface/remote/RemoteMessage.h

@@ -15,6 +15,7 @@
 
 #include "StreamingRingBuffer.h"
 
+#include <AffineTransform.h>
 #include <GraphicsDefs.h>
 #include <Region.h>
 
@@ -55,6 +56,7 @@ enum {
 	RP_SET_PATTERN,
 	RP_SET_DRAWING_MODE,
 	RP_SET_FONT,
+	RP_SET_TRANSFORM,
 
 	RP_CONSTRAIN_CLIPPING_REGION = 60,
 	RP_COPY_RECT_NO_CLIPPING,
@@ -145,6 +147,7 @@ public:
 		void					AddString(const char* string, size_t length);
 		void					AddRegion(const BRegion& region);
 		void					AddGradient(const BGradient& gradient);
+		void					AddTransform(const BAffineTransform& transform);
 
 #ifndef CLIENT_COMPILE
 		void					AddBitmap(const ServerBitmap& bitmap,
@@ -176,6 +179,7 @@ public:
 									color_space colorSpace = B_RGB32,
 									uint32 flags = 0);
 		status_t				ReadGradient(BGradient** _gradient);
+		status_t				ReadTransform(BAffineTransform& transform);
 		status_t				ReadArrayLine(BPoint& startPoint,
 									BPoint& endPoint, rgb_color& color);