change pixel format to pointer

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

client.go

@@ -120,7 +120,7 @@ func (c *ClientConn) DesktopName() []byte {
 }
 
 // PixelFormat returns connection pixel format
-func (c *ClientConn) PixelFormat() PixelFormat {
+func (c *ClientConn) PixelFormat() *PixelFormat {
 	return c.pixelFormat
 }
 
@@ -130,7 +130,7 @@ func (c *ClientConn) SetDesktopName(name []byte) {
 }
 
 // SetPixelFormat sets pixel format
-func (c *ClientConn) SetPixelFormat(pf PixelFormat) error {
+func (c *ClientConn) SetPixelFormat(pf *PixelFormat) error {
 	c.pixelFormat = pf
 	return nil
 }
@@ -208,7 +208,7 @@ type ClientConn struct {
 	// The pixel format associated with the connection. This shouldn't
 	// be modified. If you wish to set a new pixel format, use the
 	// SetPixelFormat method.
-	pixelFormat PixelFormat
+	pixelFormat *PixelFormat
 
 	quitCh  chan struct{}
 	quit    chan struct{}
@@ -298,7 +298,7 @@ type ClientConfig struct {
 	Handlers         []Handler
 	SecurityHandlers []SecurityHandler
 	Encodings        []Encoding
-	PixelFormat      PixelFormat
+	PixelFormat      *PixelFormat
 	ColorMap         ColorMap
 	ClientMessageCh  chan ClientMessage
 	ServerMessageCh  chan ServerMessage

conn.go

@@ -11,8 +11,8 @@ type Conn interface {
 	Conn() net.Conn
 	Config() interface{}
 	Protocol() string
-	PixelFormat() PixelFormat
-	SetPixelFormat(PixelFormat) error
+	PixelFormat() *PixelFormat
+	SetPixelFormat(*PixelFormat) error
 	ColorMap() ColorMap
 	SetColorMap(ColorMap)
 	Encodings() []Encoding

encoding_raw.go

@@ -28,7 +28,7 @@ func (enc *RawEncoding) Read(c Conn, rect *Rectangle) error {
 
 	for y := uint16(0); y < rect.Height; y++ {
 		for x := uint16(0); x < rect.Width; x++ {
-			color := NewColor(&pf, &cm)
+			color := NewColor(pf, &cm)
 			if err := color.Read(c); err != nil {
 				return err
 			}

example/server/main.go

@@ -51,7 +51,7 @@ func main() {
 			for y := 0; y < height; y++ {
 				for x := 0; x < width; x++ {
 					r, g, b, a := im.At(x, y).RGBA()
-					clr := rgbaToColor(&cfg.PixelFormat, r, g, b, a)
+					clr := rgbaToColor(cfg.PixelFormat, r, g, b, a)
 					colors = append(colors, *clr)
 				}
 			}

messages.go

@@ -55,7 +55,7 @@ const (
 // ServerInit struct used in server init handshake
 type ServerInit struct {
 	FBWidth, FBHeight uint16
-	PixelFormat       PixelFormat
+	PixelFormat       *PixelFormat
 	NameLength        uint32
 	NameText          []byte
 }

pixel_format.go

@@ -34,7 +34,7 @@ type PixelFormat struct {
 const pixelFormatLen = 16
 
 // NewPixelFormat returns a populated PixelFormat structure
-func NewPixelFormat(bpp uint8) PixelFormat {
+func NewPixelFormat(bpp uint8) *PixelFormat {
 	bigEndian := uint8(0)
 	//	rgbMax := uint16(math.Exp2(float64(bpp))) - 1
 	rMax := uint16(255)
@@ -58,16 +58,16 @@ func NewPixelFormat(bpp uint8) PixelFormat {
 		//	rs, gs, bs = 0, 8, 16
 		rs, gs, bs = 16, 8, 0
 	}
-	return PixelFormat{bpp, depth, bigEndian, tc, rMax, gMax, bMax, rs, gs, bs, [3]byte{}}
+	return &PixelFormat{bpp, depth, bigEndian, tc, rMax, gMax, bMax, rs, gs, bs, [3]byte{}}
 }
 
 // NewPixelFormatAten returns Aten IKVM pixel format
-func NewPixelFormatAten() PixelFormat {
-	return PixelFormat{16, 15, 0, 1, (1 << 5) - 1, (1 << 5) - 1, (1 << 5) - 1, 10, 5, 0, [3]byte{}}
+func NewPixelFormatAten() *PixelFormat {
+	return &PixelFormat{16, 15, 0, 1, (1 << 5) - 1, (1 << 5) - 1, (1 << 5) - 1, 10, 5, 0, [3]byte{}}
 }
 
 // Marshal implements the Marshaler interface
-func (pf PixelFormat) Marshal() ([]byte, error) {
+func (pf *PixelFormat) Marshal() ([]byte, error) {
 	// Validation checks.
 	switch pf.BPP {
 	case 8, 16, 32:
@@ -89,7 +89,7 @@ func (pf PixelFormat) Marshal() ([]byte, error) {
 	buf.Reset()
 	defer bPool.Put(buf)
 
-	if err := binary.Write(buf, binary.BigEndian, &pf); err != nil {
+	if err := binary.Write(buf, binary.BigEndian, pf); err != nil {
 		return nil, err
 	}
 
@@ -97,7 +97,7 @@ func (pf PixelFormat) Marshal() ([]byte, error) {
 }
 
 // Read reads from an io.Reader, and populates the PixelFormat
-func (pf PixelFormat) Read(r io.Reader) error {
+func (pf *PixelFormat) Read(r io.Reader) error {
 	buf := make([]byte, pixelFormatLen)
 	if _, err := io.ReadAtLeast(r, buf, pixelFormatLen); err != nil {
 		return err
@@ -106,7 +106,7 @@ func (pf PixelFormat) Read(r io.Reader) error {
 }
 
 // Unmarshal implements the Unmarshaler interface
-func (pf PixelFormat) Unmarshal(data []byte) error {
+func (pf *PixelFormat) Unmarshal(data []byte) error {
 	buf := bPool.Get().(*bytes.Buffer)
 	buf.Reset()
 	defer bPool.Put(buf)
@@ -115,7 +115,7 @@ func (pf PixelFormat) Unmarshal(data []byte) error {
 		return err
 	}
 
-	if err := binary.Read(buf, binary.BigEndian, &pf); err != nil {
+	if err := binary.Read(buf, binary.BigEndian, pf); err != nil {
 		return err
 	}
 
@@ -123,12 +123,12 @@ func (pf PixelFormat) Unmarshal(data []byte) error {
 }
 
 // String implements the fmt.Stringer interface
-func (pf PixelFormat) String() string {
+func (pf *PixelFormat) String() string {
 	return fmt.Sprintf("{ bpp: %d depth: %d big-endian: %d true-color: %d red-max: %d green-max: %d blue-max: %d red-shift: %d green-shift: %d blue-shift: %d }",
 		pf.BPP, pf.Depth, pf.BigEndian, pf.TrueColor, pf.RedMax, pf.GreenMax, pf.BlueMax, pf.RedShift, pf.GreenShift, pf.BlueShift)
 }
 
-func (pf PixelFormat) order() binary.ByteOrder {
+func (pf *PixelFormat) order() binary.ByteOrder {
 	if pf.BigEndian == 1 {
 		return binary.BigEndian
 	}

server.go

@@ -85,7 +85,7 @@ func (c *ServerConn) DesktopName() []byte {
 }
 
 // PixelFormat return connection pixel format
-func (c *ServerConn) PixelFormat() PixelFormat {
+func (c *ServerConn) PixelFormat() *PixelFormat {
 	return c.pixelFormat
 }
 
@@ -95,7 +95,7 @@ func (c *ServerConn) SetDesktopName(name []byte) {
 }
 
 // SetPixelFormat sets pixel format for server conn
-func (c *ServerConn) SetPixelFormat(pf PixelFormat) error {
+func (c *ServerConn) SetPixelFormat(pf *PixelFormat) error {
 	c.pixelFormat = pf
 	return nil
 }
@@ -174,7 +174,7 @@ type ServerConn struct {
 	// The pixel format associated with the connection. This shouldn't
 	// be modified. If you wish to set a new pixel format, use the
 	// SetPixelFormat method.
-	pixelFormat PixelFormat
+	pixelFormat *PixelFormat
 
 	quit chan struct{}
 }
@@ -195,7 +195,7 @@ type ServerConfig struct {
 	Handlers         []Handler
 	SecurityHandlers []SecurityHandler
 	Encodings        []Encoding
-	PixelFormat      PixelFormat
+	PixelFormat      *PixelFormat
 	ColorMap         ColorMap
 	ClientMessageCh  chan ClientMessage
 	ServerMessageCh  chan ServerMessage