Added WIP support for affine transformations to BViews.

Everything untested, but compiles, so it must work. The idea is to introduce
BAffineTransform additionally to the existing Origin and Scale properties of
BViews. One may use it in parallel or as an alternative. Painter in app_server
is not yet aware of the additional transformation. It is however already used
to transform drawing coordinates. It probably needs to work differently,
perhaps only in Painter and AGGTextRenderer.

headers/os/interface/View.h

@@ -6,6 +6,7 @@
 #define	_VIEW_H
 
 
+#include <AffineTransform.h>
 #include <Alignment.h>
 #include <Font.h>
 #include <Handler.h>
@@ -285,6 +286,12 @@ public:
 			void				SetOrigin(float x, float y);
 			BPoint				Origin() const;
 
+								// Works in addition to Origin and Scale.
+								// May be used in parallel or as a much
+								// more powerful alternative.
+			void				SetTransform(BAffineTransform transform);
+			BAffineTransform	Transform() const;
+
 			void				PushState();
 			void				PopState();
 

headers/private/app/ServerProtocol.h

@@ -341,6 +341,10 @@ enum {
 	AS_DUMP_ALLOCATOR,
 	AS_DUMP_BITMAPS,
 
+	// transformation in addition to origin/scale
+	AS_VIEW_SET_TRANSFORM,
+	AS_VIEW_GET_TRANSFORM,
+
 	AS_LAST_CODE
 };
 

headers/private/app/ServerProtocolStructs.h

@@ -9,6 +9,7 @@
 #define APP_SERVER_PROTOCOL_STRUCTS_H
 
 
+#include <AffineTransform.h>
 #include <Rect.h>
 
 
@@ -21,6 +22,7 @@ struct ViewSetStateInfo {
 	drawing_mode				drawingMode;
 	BPoint						origin;
 	float						scale;
+	BAffineTransform			transform;
 	join_mode					lineJoin;
 	cap_mode					lineCap;
 	float						miterLimit;

headers/private/interface/PictureDataWriter.h

@@ -9,6 +9,7 @@
 #define _PICTURE_DATA_WRITER_H
 
 
+#include <AffineTransform.h>
 #include <InterfaceDefs.h>
 #include <Font.h>
 #include <OS.h>
@@ -35,6 +36,7 @@ public:
 	status_t WriteSetPenSize(const float &penSize);
 	status_t WriteSetLineMode(const cap_mode &cap, const join_mode &join, const float &miterLimit);	
 	status_t WriteSetScale(const float &scale);
+	status_t WriteSetTransform(BAffineTransform transform);
 	status_t WriteSetPattern(const pattern &pat);
 	status_t WriteSetClipping(const BRegion &region);
 	status_t WriteClearClipping();

headers/private/interface/PictureProtocol.h

@@ -2,40 +2,40 @@
 #define _PICTUREPROTOCOL_H
 
 enum {
-	B_PIC_MOVE_PEN_BY		= 0x0010,
+	B_PIC_MOVE_PEN_BY			= 0x0010,
 
-	B_PIC_STROKE_LINE		= 0x0100,
-	B_PIC_STROKE_RECT		= 0x0101,
-	B_PIC_FILL_RECT			= 0x0102,
+	B_PIC_STROKE_LINE			= 0x0100,
+	B_PIC_STROKE_RECT			= 0x0101,
+	B_PIC_FILL_RECT				= 0x0102,
 	B_PIC_STROKE_ROUND_RECT		= 0x0103,
 	B_PIC_FILL_ROUND_RECT		= 0x0104,
-	B_PIC_STROKE_BEZIER		= 0x0105,
-	B_PIC_FILL_BEZIER		= 0x0106,
+	B_PIC_STROKE_BEZIER			= 0x0105,
+	B_PIC_FILL_BEZIER			= 0x0106,
 	B_PIC_STROKE_POLYGON		= 0x010B,
-	B_PIC_FILL_POLYGON		= 0x010C,
-	B_PIC_STROKE_SHAPE		= 0x010D,
-	B_PIC_FILL_SHAPE		= 0x010E,
-	B_PIC_DRAW_STRING		= 0x010F,
-	B_PIC_DRAW_PIXELS		= 0x0110,
-	B_PIC_DRAW_PICTURE		= 0x0112,
-	B_PIC_STROKE_ARC		= 0x0113,
-	B_PIC_FILL_ARC			= 0x0114,
+	B_PIC_FILL_POLYGON			= 0x010C,
+	B_PIC_STROKE_SHAPE			= 0x010D,
+	B_PIC_FILL_SHAPE			= 0x010E,
+	B_PIC_DRAW_STRING			= 0x010F,
+	B_PIC_DRAW_PIXELS			= 0x0110,
+	B_PIC_DRAW_PICTURE			= 0x0112,
+	B_PIC_STROKE_ARC			= 0x0113,
+	B_PIC_FILL_ARC				= 0x0114,
 	B_PIC_STROKE_ELLIPSE		= 0x0115,
-	B_PIC_FILL_ELLIPSE		= 0x0116,
+	B_PIC_FILL_ELLIPSE			= 0x0116,
 
 	B_PIC_ENTER_STATE_CHANGE	= 0x0200,
 	B_PIC_SET_CLIPPING_RECTS	= 0x0201,
 	B_PIC_CLIP_TO_PICTURE		= 0x0202,
-	B_PIC_PUSH_STATE		= 0x0203,
-	B_PIC_POP_STATE			= 0x0204,
+	B_PIC_PUSH_STATE			= 0x0203,
+	B_PIC_POP_STATE				= 0x0204,
 	B_PIC_CLEAR_CLIPPING_RECTS	= 0x0205,
 
-	B_PIC_SET_ORIGIN		= 0x0300,
+	B_PIC_SET_ORIGIN			= 0x0300,
 	B_PIC_SET_PEN_LOCATION		= 0x0301,
 	B_PIC_SET_DRAWING_MODE		= 0x0302,
-	B_PIC_SET_LINE_MODE		= 0x0303,
-	B_PIC_SET_PEN_SIZE		= 0x0304,
-	B_PIC_SET_SCALE			= 0x0305,
+	B_PIC_SET_LINE_MODE			= 0x0303,
+	B_PIC_SET_PEN_SIZE			= 0x0304,
+	B_PIC_SET_SCALE				= 0x0305,
 	B_PIC_SET_FORE_COLOR		= 0x0306,
 	B_PIC_SET_BACK_COLOR		= 0x0307,
 	B_PIC_SET_STIPLE_PATTERN	= 0x0308,
@@ -46,15 +46,16 @@ enum {
 	B_PIC_SET_FONT_SPACING		= 0x0382,
 	B_PIC_SET_FONT_ENCODING		= 0x0383,
 	B_PIC_SET_FONT_FLAGS		= 0x0384,
-	B_PIC_SET_FONT_SIZE		= 0x0385,
+	B_PIC_SET_FONT_SIZE			= 0x0385,
 	B_PIC_SET_FONT_ROTATE		= 0x0386,
 	B_PIC_SET_FONT_SHEAR		= 0x0387,
-	B_PIC_SET_FONT_BPP		= 0x0388,
-	B_PIC_SET_FONT_FACE		= 0x0389,
+	B_PIC_SET_FONT_BPP			= 0x0388,
+	B_PIC_SET_FONT_FACE			= 0x0389,
+	B_PIC_SET_TRANSFORM			= 0x0390,
 };
 
 
-const static uint32 kOpsTableSize = 48;
+const static uint32 kOpsTableSize = 49;
 
 
 #endif

headers/private/interface/ViewPrivate.h

@@ -39,8 +39,9 @@ enum {
 	B_VIEW_LOW_COLOR_BIT		= 0x00008000,
 	B_VIEW_VIEW_COLOR_BIT		= 0x00010000,
 	B_VIEW_PATTERN_BIT			= 0x00020000,
+	B_VIEW_TRANSFORM_BIT		= 0x00040000,
 
-	B_VIEW_ALL_BITS				= 0x0003ffff,
+	B_VIEW_ALL_BITS				= 0x0007ffff,
 
 	// these used for archiving only
 	B_VIEW_RESIZE_BIT			= 0x00001000,
@@ -111,7 +112,11 @@ class ViewState {
 		::drawing_mode		drawing_mode;
 		BRegion				clipping_region;
 		bool				clipping_region_used;
+
+		// transformation
 		BPoint				origin;
+		float				scale;
+		BAffineTransform	transform;
 
 		// line modes
 		join_mode			line_join;
@@ -122,8 +127,6 @@ class ViewState {
 		source_alpha		alpha_source_mode;
 		alpha_function		alpha_function_mode;
 
-		float				scale;
-
 		// fonts
 		BFont				font;
 		uint16				font_flags;