Finishes remote frame buffer header file
This commit is contained in:
parent
276388a65d
commit
20e31640aa
@ -116,7 +116,7 @@ struct rfb_supported_sectypes_s
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_SUPPORTED_SECTYPES_S(n) \
|
||||
(sizeof(struct rfb_supported_sectypes_s) + (n) - 1);
|
||||
(sizeof(struct rfb_supported_sectypes_s) + (n) - 1)
|
||||
|
||||
/* "If the server listed at least one valid security type supported by the
|
||||
* client, the client sends back a single byte indicating which security
|
||||
@ -141,7 +141,7 @@ struct rfb_sectype_connfail_s
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_SECTYPE_CONNFAIL_S(n) \
|
||||
(sizeof(struct rfb_sectype_connfail_s) + (n) - 1);
|
||||
(sizeof(struct rfb_sectype_connfail_s) + (n) - 1)
|
||||
|
||||
/* "Version 3.3 The server decides the security type and sends a single
|
||||
* word:"
|
||||
@ -188,7 +188,7 @@ struct rfb_sectype_fail_s
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_SECTYPE_FAIL_S(n) \
|
||||
(sizeof(struct rfb_sectype_fail_s) + (n) - 1);
|
||||
(sizeof(struct rfb_sectype_fail_s) + (n) - 1)
|
||||
|
||||
/* "Version 3.3 and 3.7 If unsuccessful, the server closes the connection." */
|
||||
|
||||
@ -240,8 +240,8 @@ struct rfb_response_s
|
||||
* give exclusive access to this client by disconnecting all other clients."
|
||||
*/
|
||||
|
||||
#defin RFB_FLAG_SHARED 0
|
||||
#defin RFB_FLAG_EXCLUSIVE 1
|
||||
#define RFB_FLAG_SHARED 0
|
||||
#define RFB_FLAG_EXCLUSIVE 1
|
||||
|
||||
struct rfb_clientinit_s
|
||||
{
|
||||
@ -280,7 +280,7 @@ struct rfb_serverinit_s
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_SERVERINIT_S(n) \
|
||||
(sizeof(struct rfb_serverinit_s) + (n) - 1);
|
||||
(sizeof(struct rfb_serverinit_s) + (n) - 1)
|
||||
|
||||
/* "Server-pixel-format specifies the server’s natural pixel format. This
|
||||
* pixel format will be used unless the client requests a different format
|
||||
@ -317,31 +317,14 @@ struct rfb_serverinit_s
|
||||
|
||||
/* 6.4 Client to Server Messages ********************************************/
|
||||
|
||||
/* "The client to server message types defined in this document are:
|
||||
*
|
||||
* "Number Name
|
||||
* 0 SetPixelFormat
|
||||
* 2 SetEncodings
|
||||
* 3 FramebufferUpdateRequest
|
||||
* 4 KeyEvent
|
||||
* 5 PointerEvent
|
||||
* 6 ClientCutText
|
||||
*
|
||||
* "Other registered message types are:
|
||||
*
|
||||
* "Number Name
|
||||
* 255 Anthony Liguori
|
||||
* 254, 127 VMWare
|
||||
* 253 gii
|
||||
* 252 tight
|
||||
* 251 Pierre Ossman SetDesktopSize
|
||||
* 250 Colin Dean xvp
|
||||
* 249 OLIVE Call Control
|
||||
*
|
||||
* "Note that before sending a message not defined in this document a client
|
||||
* must have determined that the server supports the relevant extension by
|
||||
* receiving some extension-specific confirmation from the server.
|
||||
*/
|
||||
/* "The client to server message types defined in this document are: */
|
||||
|
||||
#define RFB_SETPIXELFMTT_MSG 0 /* SetPixelFormat */
|
||||
#define RFB_SETENCODINGS_MSG 2 /* SetEncodings */
|
||||
#define RFB_FBUPDATEREQ_MSG 3 /* FramebufferUpdateRequest */
|
||||
#define RFB_KEYEVENT_MSG 4 /* KeyEvent */
|
||||
#define RFB_POINTEREVENT_MSG 5 /* PointerEvent */
|
||||
#define RFB_CLIENTCUTTEXT_MSG 6 /* ClientCutText */
|
||||
|
||||
/* 6.4.1 SetPixelFormat
|
||||
*
|
||||
@ -393,7 +376,7 @@ struct rfb_setencodings_s
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_SERVERINIT_S(n) \
|
||||
(sizeof(struct rfb_serverinit_s) + (((n) - 1) << 2));
|
||||
(sizeof(struct rfb_serverinit_s) + (((n) - 1) << 2))
|
||||
|
||||
/* 6.4.3 FramebufferUpdateRequest
|
||||
*
|
||||
@ -534,14 +517,515 @@ struct rfb_clientcuttext_s
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_CLIENTCUTTEXT_S(n) \
|
||||
(sizeof(struct rfb_clientcuttext_s) + (n) - 1);
|
||||
(sizeof(struct rfb_clientcuttext_s) + (n) - 1)
|
||||
|
||||
/* 6.5 Server to Client Messages ********************************************/
|
||||
|
||||
/* "The server to client message types defined in this document are:" */
|
||||
|
||||
#define RFB_FBUPDATE_MSG 0 /* FramebufferUpdate */
|
||||
#define RFB_SETCOLORMAP_MSG 1 /* SetColourMapEntries */
|
||||
#define RFB_BELL_MSG 2 /* Bell */
|
||||
#define RFB_SERVERCUTTEXT_MSG 3 /* ServerCutText */
|
||||
|
||||
/* 6.5.1 FramebufferUpdate
|
||||
*
|
||||
* "A framebuffer update consists of a sequence of rectangles of pixel data
|
||||
* which the client should put into its framebuffer. It is sent in response
|
||||
* to a FramebufferUpdateRequest from the client. Note that there may be an
|
||||
* indefinite period between the FramebufferUpdateRequest and the
|
||||
* FramebufferUpdate."
|
||||
*/
|
||||
|
||||
struct rfb_rectangle_s
|
||||
{
|
||||
uint8_t xpos[2]; /* U16 X position */
|
||||
uint8_t ypos[2]; /* U16 Y position */
|
||||
uint8_t width[2]; /* U16 Width */
|
||||
uint8_t height[2]; /* U16 Height */
|
||||
uint8_t encoding[4]; /* S32 Encoding type */
|
||||
uint8_t data[1]; /* Pixel data, actual size varies */
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_RECTANGES(n,d) \
|
||||
(sizeof(struct rfb_framebufferupdate_s) + (d) - 1)
|
||||
|
||||
struct rfb_framebufferupdate_s
|
||||
{
|
||||
uint8_t msgtype; /* U8 Message type */
|
||||
uint8_t padding;
|
||||
uint8_t nrect[2]; /* U16 Number of rectangles */
|
||||
struct rfb_rectangle_s rect[1]; /* Actual number is nrect */
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_FRAMEBUFFERUPDATE_S(n,r) \
|
||||
(sizeof(struct rfb_framebufferupdate_s) + (r) - sizeof(rfb_rectangle_s))
|
||||
|
||||
/* 6.5.2 SetColourMapEntries
|
||||
*
|
||||
* "When the pixel format uses a 'colour map', this message tells the client
|
||||
* that the specified pixel values should be mapped to the given RGB
|
||||
* intensities."
|
||||
*/
|
||||
|
||||
struct rfb_rgb_s
|
||||
{
|
||||
uint8_t r[2]; /* U16 red */
|
||||
uint8_t g[2]; /* U16 green */
|
||||
uint8_t b[2]; /* U16 blue */
|
||||
};
|
||||
|
||||
#define RFB_RGB_SIZE(n) \
|
||||
((n) * sizeof(struct rfb_rgb_s))
|
||||
|
||||
struct rfb_setcolourmapentries_s
|
||||
{
|
||||
uint8_t msgtype; /* U8 Message type */
|
||||
uint8_t padding;
|
||||
uint8_t first[2]; /* U16 First colour */
|
||||
uint8_t ncolors[2]; /* U16 Number of colours */
|
||||
struct rfb_rgb_s color[1]; /* Colors, actual number is ncolors */
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_SETCOLOURMAPENTRIES_S(n,r) \
|
||||
(sizeof(struct rfb_setcolourmapentries_s) + RFB_RGB_SIZE((n) - 1))
|
||||
|
||||
/* 6.5.3 Bell
|
||||
*
|
||||
* "Ring a bell on the client if it has one.
|
||||
*/
|
||||
|
||||
struct rfb_bell_s
|
||||
{
|
||||
uint8_t msgtype; /* U8 Message type */
|
||||
};
|
||||
|
||||
/* 6.5.4 ServerCutText
|
||||
*
|
||||
* "The server has new ISO 8859-1 (Latin-1) text in its cut buffer. Ends of
|
||||
* lines are represented by the linefeed / newline character (value 10)
|
||||
* alone. No carriage-return (value 13) is needed. There is currently no
|
||||
* way to transfer text outside the Latin-1 character set.
|
||||
*/
|
||||
|
||||
struct rfb_servercuttext_s
|
||||
{
|
||||
uint8_t msgtype; /* U8 Message type */
|
||||
uint8_t padding[3];
|
||||
uint8_t length[2]; /* U8 Length */
|
||||
uint8_t text[1]; /* U8 Text, actual length is Length */
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_SERVERCUTTEXT_S(n) \
|
||||
(sizeof(struct rfb_servercuttext_s) + (n) - 1)
|
||||
|
||||
/* 6.6 Encodings ************************************************************/
|
||||
|
||||
/* The encodings defined in this document are: */
|
||||
|
||||
#define RFB_ENCODING_RAW 0 /* Raw */
|
||||
#define RFB_ENCODING_COPYRECT 1 /* CopyRect */
|
||||
#define RFB_ENCODING_RRE 2 /* RRE */
|
||||
#define RFB_ENCODING_HEXTILE 5 /* Hextile */
|
||||
#define RFB_ENCODING_ZRLE 16 /* ZRLE */
|
||||
#define RFB_ENCODING_CURSOR -239 /* Cursor pseudo-encoding */
|
||||
#define RFB_ENCODING_DESKTOP -223 /* DesktopSize pseudo-encoding */
|
||||
|
||||
/* 6.6.1 Raw encoding
|
||||
*
|
||||
* "The simplest encoding type is raw pixel data. In this case the data
|
||||
* consists of width x height pixel values (where width and height are the
|
||||
* width and height of the rectangle). The values simply represent each
|
||||
* pixel in left-to-right scanline order. All RFB clients must be able to
|
||||
* cope with pixel data in this raw encoding, and RFB servers should only
|
||||
* produce raw encoding unless the client specifically asks for some other
|
||||
* encoding type.
|
||||
*/
|
||||
|
||||
/* 6.6.2 CopyRect encoding
|
||||
*
|
||||
* "The CopyRect (copy rectangle) encoding is a very simple and efficient
|
||||
* encoding which can be used when the client already has the same pixel
|
||||
* data elsewhere in its framebuffer. The encoding on the wire simply
|
||||
* consists of an X,Y coordinate. This gives a position in the framebuffer
|
||||
* from which the client can copy the rectangle of pixel data. This can be
|
||||
* used in a variety of situations, the most obvious of which are when the
|
||||
* user moves a window across the screen, and when the contents of a window
|
||||
* are scrolled. A less obvious use is for optimising drawing of text or
|
||||
* other repeating patterns. An intelligent server may be able to send a
|
||||
* pattern explicitly only once, and knowing the previous position of the
|
||||
* pattern in the framebuffer, send subsequent occurrences of the same
|
||||
* pattern using the CopyRect encoding."
|
||||
*/
|
||||
|
||||
struct rfb_copyrect_encoding_s
|
||||
{
|
||||
uint8_t xpos[2]; /* U16 Source x position */
|
||||
uint8_t ypos[2]; /* U16 Source y position */
|
||||
};
|
||||
|
||||
/* 6.6.3 RRE encoding
|
||||
*
|
||||
* "RRE stands for rise-and-run-length encoding and as its name implies, it
|
||||
* is essentially a two-dimensional analogue of run-length encoding.
|
||||
* RRE-encoded rectangles arrive at the client in a form which can be
|
||||
* rendered immediately and efficiently by the simplest of graphics
|
||||
* engines. RRE is not appropriate for complex desktops, but can be
|
||||
* useful in some situations.
|
||||
*
|
||||
* "The basic idea behind RRE is the partitioning of a rectangle of pixel
|
||||
* data into rectangular subregions (subrectangles) each of which consists
|
||||
* of pixels of a single value and the union of which comprises the
|
||||
* original rectangular region. The near-optimal partition of a given
|
||||
* rectangle into such subrectangles is relatively easy to compute.
|
||||
*
|
||||
* "The encoding consists of a background pixel value, Vb (typically the
|
||||
* most prevalent pixel value in the rectangle) and a count N, followed
|
||||
* by a list of N subrectangles, each of which consists of a tuple
|
||||
* < v, x, y, w, h > where v (6= Vb) is the pixel value, (x, y) are the
|
||||
* coordinates of the subrectangle relative to the top-left corner of the
|
||||
* rectangle, and (w, h) are the width and height of the subrectangle. The
|
||||
* client can render the original rectangle by drawing a filled rectangle
|
||||
* of the background pixel value and then drawing a filled rectangle
|
||||
* corresponding to each subrectangle. On the wire, the data begins with
|
||||
* the header:"
|
||||
*/
|
||||
|
||||
struct rfb_rrehdr16_s
|
||||
{
|
||||
uint8_t nsubrects[4]; /* U32 Number of sub-rectangle */
|
||||
uint8_t pixel[2]; /* U16 Background pixel */
|
||||
};
|
||||
|
||||
struct rfb_rrehdr32_s
|
||||
{
|
||||
uint8_t nsubrects[4]; /* U32 Number of sub-rectangle */
|
||||
uint8_t pixel[4]; /* U32 Background pixel */
|
||||
};
|
||||
|
||||
/* "This is followed by number-of-subrectangles instances of the following
|
||||
* structure:"
|
||||
*/
|
||||
|
||||
struct rfb_rrerect16_s
|
||||
{
|
||||
uint8_t pixel[2]; /* U16 sub-rect pixel value */
|
||||
uint8_t xpos[2]; /* U16 X position */
|
||||
uint8_t ypos[2]; /* U16 Y position */
|
||||
uint8_t width[2]; /* U16 Width */
|
||||
uint8_t height[2]; /* U16 Height */
|
||||
};
|
||||
|
||||
/* 6.6.4 Hextile encoding
|
||||
*
|
||||
* "Hextile is a variation on the RRE idea. Rectangles are split up into
|
||||
* 16x16 tiles, allowing the dimensions of the subrectangles to be
|
||||
* specified in 4 bits each, 16 bits in total. The rectangle is split
|
||||
* into tiles starting at the top left going in left-to-right, top-to-
|
||||
* bottom order. The encoded contents of the tiles simply follow one another
|
||||
* in the predetermined order. If the width of the whole rectangle is not
|
||||
* an exact multiple of 16 then the width of the last tile in each row will
|
||||
* be correspondingly smaller. Similarly if the height of the whole
|
||||
* rectangle is not an exact multiple of 16 then the height of each tile in
|
||||
* the final row will also be smaller.
|
||||
*
|
||||
* "Each tile is either encoded as raw pixel data, or as a variation on RRE.
|
||||
* Each tile has a background pixel value, as before. The background pixel
|
||||
* value does not need to be explicitly specified for a given tile if it is
|
||||
* the same as the background of the previous tile. However the background
|
||||
* pixel value may not be carried over if the previous tile was Raw. If all
|
||||
* of the subrectangles of a tile have the same pixel value, this can be
|
||||
* specified once as a foreground pixel value for the whole tile. As with
|
||||
* the background, the foreground pixel value can be left unspecified,
|
||||
* meaning it is carried over from the previous tile. The foreground pixel
|
||||
* value may not be carried over if the previous tile had the Raw or
|
||||
* SubrectsColoured bits set. It may, however, be carried over from a
|
||||
* previous tile with the AnySubrects bit clear, as long as that tile
|
||||
* itself carried over a valid foreground from its previous tile.
|
||||
*
|
||||
* "So the data consists of each tile encoded in order. Each tile begins
|
||||
* with a subencoding type byte, which is a mask made up of a number of
|
||||
* bits:"
|
||||
*/
|
||||
|
||||
#define RFB_SUBENCODING_RAW 1 /* Raw */
|
||||
#define RFB_SUBENCODING_BACK 2 /* BackgroundSpecified*/
|
||||
#define RFB_SUBENCODING_FORE 4 /* ForegroundSpecified*/
|
||||
#define RFB_SUBENCODING_ANY 8 /* AnySubrects*/
|
||||
#define RFB_SUBENCODING_COLORED 16 /* SubrectsColoured*/
|
||||
|
||||
/* "If the Raw bit is set then the other bits are irrelevant; width x height
|
||||
* pixel values follow (where width and height are the width and height of
|
||||
* the tile). Otherwise the other bits in the mask are as follows:
|
||||
*
|
||||
* "BackgroundSpecified - if set, a pixel value follows which specifies the
|
||||
* background colour for this tile:"
|
||||
*/
|
||||
|
||||
struct rfb_backpixel16_s
|
||||
{
|
||||
uint8_t pixel[2]; /* U16 Background pixel value */
|
||||
};
|
||||
|
||||
struct rfb_backpixel32_s
|
||||
{
|
||||
uint8_t pixel[4]; /* U32 Background pixel value */
|
||||
};
|
||||
|
||||
/* "The first non-raw tile in a rectangle must have this bit set. If this
|
||||
* bit isn’t set then the background is the same as the last tile.
|
||||
*
|
||||
* "ForegroundSpecified - if set, a pixel value follows which specifies the
|
||||
* foreground colour to be used for all subrectangles in this tile:"
|
||||
*/
|
||||
|
||||
struct rfb_forepixel16_s
|
||||
{
|
||||
uint8_t pixel[2]; /* U16 Foreground pixel value */
|
||||
};
|
||||
|
||||
struct rfb_forepixel32_s
|
||||
{
|
||||
uint8_t pixel[4]; /* U32 Foreground pixel value */
|
||||
};
|
||||
|
||||
/* "If this bit is set then the SubrectsColoured bit must be zero.
|
||||
*
|
||||
* "AnySubrects - if set, a single byte follows giving the number of
|
||||
* subrectangles following:"
|
||||
*/
|
||||
|
||||
struct rfb_nrects_s
|
||||
{
|
||||
uint8_t nsubrects; /* U8 Number of sub-rectangles */
|
||||
};
|
||||
|
||||
/* "If not set, there are no subrectangles (i.e. the whole tile is just
|
||||
* solid background colour).
|
||||
*
|
||||
* "SubrectsColoured - if set then each subrectangle is preceded by a pixel
|
||||
* value giving the colour of that subrectangle, so a subrectangle is:"
|
||||
*/
|
||||
|
||||
struct rfb_subrectscolored16_s
|
||||
{
|
||||
uint8_t pixel[2]; /* U16 Sub-rect pixel value */
|
||||
uint8_t xy; /* U8 X and y position */
|
||||
uint8_t wh; /* U8 Width and height */
|
||||
};
|
||||
|
||||
struct rfb_subrectscolored32_s
|
||||
{
|
||||
uint8_t pixel[4]; /* U32 Sub-rect pixel value */
|
||||
uint8_t xy; /* U8 X and y position */
|
||||
uint8_t wh; /* U8 Width and height */
|
||||
};
|
||||
|
||||
/* "If not set, all subrectangles are the same colour, the foreground
|
||||
* colour; if the ForegroundSpecified bit wasn’t set then the foreground
|
||||
* is the same as the last tile. A subrectangle is:"
|
||||
*/
|
||||
|
||||
struct rfb_subrect_s
|
||||
{
|
||||
uint8_t xy; /* U8 X and y position */
|
||||
uint8_t wh; /* U8 Width and height */
|
||||
};
|
||||
|
||||
/* "The position and size of each subrectangle is specified in two bytes,
|
||||
* x-and-y-position and width-and-height. The most-significant four bits of
|
||||
* x-and-y-position specify the X position, the least-significant specify
|
||||
* the Y position. The most-significant four bits of width-and-height
|
||||
* specify the width minus one, the least-significant specify the height
|
||||
* minus one."
|
||||
*/
|
||||
|
||||
/* 6.6.5 ZRLE encoding
|
||||
*
|
||||
* "ZRLE stands for Zlib1 Run-Length Encoding, and combines zlib
|
||||
* compression, tiling, palettisation and run-length encoding. On the wire,
|
||||
* the rectangle begins with a 4-byte length field, and is followed by that
|
||||
* many bytes of zlib-compressed data. A single zlib 'stream' object is
|
||||
* used for a given RFB protocol connection, so that ZRLE rectangles must
|
||||
* be encoded and decoded strictly in order."
|
||||
*/
|
||||
|
||||
struct rfb_srle_s
|
||||
{
|
||||
uint8_t length[4]; /* U32 Length */
|
||||
uint8_t data[1]; /* U8 zlibData, actual size is length */
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_SRLE_S(n,r) \
|
||||
(sizeof(struct rfb_srle_s) + (n) - 1)
|
||||
|
||||
/* "The zlibData when uncompressed represents tiles of 64x64 pixels in
|
||||
* left-to-right, top-to-bottom order, similar to hextile. If the width of
|
||||
* the rectangle is not an exact multiple of 64 then the width of the last
|
||||
* tile in each row is smaller, and if the height of the rectangle is not
|
||||
* an exact multiple of 64 then the height of each tile in the final row
|
||||
* is smaller.
|
||||
*
|
||||
* "ZRLE makes use of a new type CPIXEL (compressed pixel). This is the same
|
||||
* as a PIXEL for the agreed pixel format, except where true-colour-flag is
|
||||
* non-zero, bitsper-pixel is 32, depth is 24 or less and all of the bits
|
||||
* making up the red, green and blue intensities fit in either the least
|
||||
* significant 3 bytes or the most significant 3 bytes. In this case a
|
||||
* CPIXEL is only 3 bytes long, and contains the least significant or the
|
||||
* most significant 3 bytes as appropriate. bytesPerCPixel is the number of
|
||||
* bytes in a CPIXEL.
|
||||
*
|
||||
* "Each tile begins with a subencoding type byte. The top bit of this byte
|
||||
* is set if the tile has been run-length encoded, clear otherwise. The
|
||||
* bottom seven bits indicate the size of the palette used - zero means no
|
||||
* palette, one means that the tile is of a single colour, 2 to 127
|
||||
* indicate a palette of that size. The possible values of subencoding are:"
|
||||
*/
|
||||
|
||||
#define RFB_SUBENCODING_RAW 0 /* Raw pixel data */
|
||||
#define RFB_SUBENCODING_SOLID 1 /* A solid tile of a single color */
|
||||
#define RFB_SUBENCODING_PACKED1 2 /* Packed palette types */
|
||||
#define RFB_SUBENCODING_PACKED2 3
|
||||
#define RFB_SUBENCODING_PACKED3 4
|
||||
#define RFB_SUBENCODING_PACKED4 5
|
||||
#define RFB_SUBENCODING_PACKED5 6
|
||||
#define RFB_SUBENCODING_PACKED6 7
|
||||
#define RFB_SUBENCODING_PACKED7 8
|
||||
#define RFB_SUBENCODING_PACKED8 9
|
||||
#define RFB_SUBENCODING_PACKED9 10
|
||||
#define RFB_SUBENCODING_PACKED10 11
|
||||
#define RFB_SUBENCODING_PACKED11 12
|
||||
#define RFB_SUBENCODING_PACKED12 13
|
||||
#define RFB_SUBENCODING_PACKED13 14
|
||||
#define RFB_SUBENCODING_PACKED14 15
|
||||
#define RFB_SUBENCODING_PACKED15 16
|
||||
#define RFB_SUBENCODING_RLE 128 /* Plain RLE */
|
||||
#define RFB_SUBENCODING_PALRLE 129 /* Palette RLE */
|
||||
|
||||
|
||||
/* "Raw pixel data. width x height pixel values follow (where width and
|
||||
* height are the width and height of the tile):"
|
||||
*/
|
||||
|
||||
struct rfb_rawpixel16_s
|
||||
{
|
||||
uint8_t pixels[2]; /* Actual size is 2*w*h */
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_RAWPIXEL16_S(n,r) \
|
||||
(sizeof(struct rfb_rawpixel16_s) + (((n) - 1) << 1))
|
||||
|
||||
struct rfb_rawpixel32_s
|
||||
{
|
||||
uint8_t pixels[4]; /* Actual size is 4*w*h */
|
||||
};
|
||||
|
||||
#define SIZEOF_RFB_RAWPIXEL32_S(n,r) \
|
||||
(sizeof(struct rfb_rawpixel32_s) + (((n) - 1) << 2))
|
||||
|
||||
/* "A solid tile consisting of a single colour. The pixel value follows:" */
|
||||
|
||||
struct rfb_solid16_s
|
||||
{
|
||||
uint8_t pixels[2]; /* Pixel value */
|
||||
};
|
||||
|
||||
struct rfb_solid32_s
|
||||
{
|
||||
uint8_t pixels[4]; /* Pixel value */
|
||||
};
|
||||
|
||||
/* "Packed palette types. Followed by the palette, consisting of
|
||||
* paletteSize(= subencoding) pixel values. Then the packed pixels follow,
|
||||
* each pixel represented as a bit field yielding an index into the palette
|
||||
* (0 meaning the first palette entry). For paletteSize 2, a 1-bit field is
|
||||
* used, for paletteSize 3 or 4 a 2-bit field is used and for paletteSize
|
||||
* from 5 to 16 a 4-bit field is used. The bit fields are packed into bytes,
|
||||
* the most significant bits representing the leftmost pixel (i.e. big
|
||||
* endian). For tiles not a multiple of 8, 4 or 2 pixels wide (as
|
||||
* appropriate), padding bits are used to align each row to an exact number
|
||||
* of bytes."
|
||||
*
|
||||
* REVISIT: Difficult to represent since it is a variable length array of
|
||||
* RGB pixels follow by the variable length array of packed pixels.
|
||||
*/
|
||||
|
||||
/* "Plain RLE. Consists of a number of runs, repeated until the tile is
|
||||
* done. Runs may continue from the end of one row to the beginning of the
|
||||
* next. Each run is a represented by a single pixel value followed by the
|
||||
* length of the run. The length is represented as one or more bytes. The
|
||||
* length is calculated as one more than the sum of all the bytes
|
||||
* representing the length. Any byte value other than 255 indicates the
|
||||
* final byte. So for example length 1 is represented as [0], 255 as [254],
|
||||
* 256 as [255,0], 257 as [255,1], 510 as [255,254], 511 as [255,255,0] and
|
||||
* so on."
|
||||
*
|
||||
* REVISIT: Difficult to represent. Consists of (1) a color value, (2)
|
||||
* a variable length array of data, followed by (3) the run length.
|
||||
*/
|
||||
|
||||
/* "Palette RLE. Followed by the palette, consisting of paletteSize =
|
||||
* (subencoding − 128) pixel values:"
|
||||
*/
|
||||
|
||||
struct rfb_palette16_s
|
||||
{
|
||||
uint8_t palette[2]; /* Actual size is 2*palleteSize */
|
||||
};
|
||||
|
||||
struct rfb_palette32_s
|
||||
{
|
||||
uint8_t palette[4]; /* Actual size is 4*palleteSize */
|
||||
};
|
||||
|
||||
/* Then as with plain RLE, consists of a number of runs, repeated until the
|
||||
* tile is done. A run of length one is represented simply by a palette index:
|
||||
*/
|
||||
|
||||
struct rfb_palettendx_s
|
||||
{
|
||||
uint8_t index; /* U8 Palette Index */
|
||||
};
|
||||
|
||||
/* A run of length more than one is represented by a palette index with the
|
||||
* top bit set, followed by the length of the run as for plain RLE."
|
||||
*
|
||||
* REVISIT: See comment with similar plain RLE representation.
|
||||
*/
|
||||
|
||||
/* 6.7 Pseudo-Encodings *****************************************************/
|
||||
|
||||
/* 6.7.1 Cursor pseudo-encoding
|
||||
*
|
||||
* "A client which requests the Cursor pseudo-encoding is declaring that it
|
||||
* is capable of drawing a mouse cursor locally. This can significantly
|
||||
* improve perceived performance over slow links. The server sets the
|
||||
* cursor shape by sending a pseudo-rectangle with the Cursor pseudo-
|
||||
* encoding as part of an update. The pseudo-rectangle’s x-position and
|
||||
* y-position indicate the hotspot of the cursor, and width and height
|
||||
* indicate the width and height of the cursor in pixels. The data consists
|
||||
* of width x height pixel values followed by a bitmask. The bitmask
|
||||
* consists of left-to-right, top-to-bottom scanlines, where each scanline
|
||||
* is padded to a whole number of bytes floor((width + 7)/8). Within each
|
||||
* byte the most significant bit represents the leftmost pixel, with a
|
||||
* 1-bit meaning the corresponding pixel in the cursor is valid."
|
||||
*
|
||||
* REVISIT: Also difficult to represent: A variable length pixel arry
|
||||
* followed by a variable length bit mask.
|
||||
*/
|
||||
|
||||
/* 6.7.2 DesktopSize pseudo-encoding
|
||||
*
|
||||
* "A client which requests the DesktopSize pseudo-encoding is declaring
|
||||
* that it is capable of coping with a change in the framebuffer width
|
||||
* and/or height. The server changes the desktop size by sending a
|
||||
* pseudo-rectangle with the DesktopSize pseudo-encoding as the last
|
||||
* rectangle in an update. The pseudo-rectangle’s x-position and y-position
|
||||
* are ignored, and width and height indicate the new width and height of
|
||||
* the framebuffer. There is no further data associated with the
|
||||
* pseudo-rectangle.
|
||||
*/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Function Prototypes
|
||||
****************************************************************************/
|
||||
|
Loading…
Reference in New Issue
Block a user