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libvncserver
Commit af85e5fe authored by dscho's avatar dscho
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updated to vnc-3.3.4 (ZRLE encoding)

parent 5a5c22ff
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Showing with 836 additions and 40 deletions
Makefile
View file @ af85e5fe
INCLUDES=-I.
VNCSERVERLIB=-L. -lvncserver -L/usr/local/lib -lz -ljpeg
# for Solaris
CXX=g++
CC=gcc
# for Solaris
#EXTRALIBS=-lsocket -lnsl -L/usr/X/lib
# for FreeBSD
......@@ -18,11 +20,8 @@ FLAG24 = -DALLOW24BPP
OPTFLAGS=-g -Wall -pedantic
#OPTFLAGS=-O2 -Wall
CFLAGS=$(OPTFLAGS) $(PTHREADDEF) $(FLAG24) $(INCLUDES) $(EXTRAINCLUDES) -DBACKCHANNEL
RANLIB=ranlib
LIBS=$(LDFLAGS) $(VNCSERVERLIB) $(PTHREADLIB) $(EXTRALIBS)
# for Mac OS X
OSX_LIBS = -framework ApplicationServices -framework Carbon -framework IOKit
......@@ -30,14 +29,31 @@ OSX_LIBS = -framework ApplicationServices -framework Carbon -framework IOKit
#XLIBS = -L/usr/X11R6/lib -lXtst -lXext -lX11
XLIBS = -L/usr/X11R6/lib -L/usr/lib32 -lXtst -lXext -lX11
ifdef CXX
ZRLE_SRCS=zrle.cc rdr/FdInStream.cxx rdr/FdOutStream.cxx rdr/InStream.cxx \
rdr/NullOutStream.cxx rdr/ZlibInStream.cxx rdr/ZlibOutStream.cxx
ZRLE_OBJS=zrle.o rdr/FdInStream.o rdr/FdOutStream.o rdr/InStream.o \
rdr/NullOutStream.o rdr/ZlibInStream.o rdr/ZlibOutStream.o
ZRLE_DEF=-DHAVE_ZRLE
%.o: %.cxx
$(CXX) $(CXXFLAGS) -c -o $@ $<
endif
CFLAGS=$(OPTFLAGS) $(PTHREADDEF) $(FLAG24) $(INCLUDES) $(EXTRAINCLUDES) $(ZRLE_DEF) -DBACKCHANNEL
CXXFLAGS=$(OPTFLAGS) $(PTHREADDEF) $(FLAG24) $(INCLUDES) $(EXTRAINCLUDES) $(ZRLE_DEF) -DBACKCHANNEL
LIBS=$(LDFLAGS) $(VNCSERVERLIB) $(PTHREADLIB) $(EXTRALIBS)
SOURCES=main.c rfbserver.c sraRegion.c auth.c sockets.c \
stats.c corre.c hextile.c rre.c translate.c cutpaste.c \
zlib.c tight.c httpd.c cursor.c font.c \
draw.c selbox.c d3des.c vncauth.c cargs.c
draw.c selbox.c d3des.c vncauth.c cargs.c $(ZRLE_SRCS)
OBJS=main.o rfbserver.o sraRegion.o auth.o sockets.o \
stats.o corre.o hextile.o rre.o translate.o cutpaste.o \
zlib.o tight.o httpd.o cursor.o font.o \
draw.o selbox.o d3des.o vncauth.o cargs.o
draw.o selbox.o d3des.o vncauth.o cargs.o $(ZRLE_OBJS)
INSTALLHEADER=rfb.h rfbproto.h sraRegion.h keysym.h
all: example pnmshow storepasswd
......
corre.c
View file @ af85e5fe
......@@ -6,6 +6,7 @@
*/
/*
* Copyright (C) 2002 RealVNC Ltd.
* OSXvnc Copyright (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>.
* Original Xvnc code Copyright (C) 1999 AT&T Laboratories Cambridge.
* All Rights Reserved.
......@@ -63,17 +64,15 @@ rfbSendRectEncodingCoRRE(cl, x, y, w, h)
int x, y, w, h;
{
if (h > cl->correMaxHeight) {
rfbSendRectEncodingCoRRE(cl, x, y, w, cl->correMaxHeight );
rfbSendRectEncodingCoRRE(cl, x, y + cl->correMaxHeight, w,
h - cl->correMaxHeight);
return FALSE;
return (rfbSendRectEncodingCoRRE(cl, x, y, w, cl->correMaxHeight) &&
rfbSendRectEncodingCoRRE(cl, x, y + cl->correMaxHeight, w,
h - cl->correMaxHeight));
}
if (w > cl->correMaxWidth) {
rfbSendRectEncodingCoRRE(cl, x, y, cl->correMaxWidth, h);
rfbSendRectEncodingCoRRE(cl, x + cl->correMaxWidth, y,
w - cl->correMaxWidth, h);
return FALSE;
return (rfbSendRectEncodingCoRRE(cl, x, y, cl->correMaxWidth, h) &&
rfbSendRectEncodingCoRRE(cl, x + cl->correMaxWidth, y,
w - cl->correMaxWidth, h));
}
rfbSendSmallRectEncodingCoRRE(cl, x, y, w, h);
......
cvs_update_anonymously
View file @ af85e5fe
if [ a"$1" = adiff ]; then
cmd=diff
shift
else
cmd=update
fi
cvs -z3 -d :pserver:anonymous@cvs.libvncserver.sf.net:/cvsroot/libvncserver $cmd
cvs -z3 -d :pserver:anonymous@cvs.libvncserver.sf.net:/cvsroot/libvncserver $cmd "$@"
httpd.c
View file @ af85e5fe
......@@ -3,6 +3,7 @@
*/
/*
* Copyright (C) 2002 RealVNC Ltd.
* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
......@@ -47,30 +48,21 @@
#include "rfb.h"
#define NOT_FOUND_STR "HTTP/1.0 404 Not found\n\n" \
#define NOT_FOUND_STR "HTTP/1.0 404 Not found\r\n\r\n" \
"<HEAD><TITLE>File Not Found</TITLE></HEAD>\n" \
"<BODY><H1>File Not Found</H1></BODY>\n"
#define INVALID_REQUEST_STR "HTTP/1.0 400 Invalid Request\n\n" \
#define INVALID_REQUEST_STR "HTTP/1.0 400 Invalid Request\r\n\r\n" \
"<HEAD><TITLE>Invalid Request</TITLE></HEAD>\n" \
"<BODY><H1>Invalid request</H1></BODY>\n"
#define OK_STR "HTTP/1.0 200 OK\nContent-Type: text/html\n\n"
#define OK_STR "HTTP/1.0 200 OK\nContent-Type: text/html\r\n\r\n"
static void httpProcessInput();
static Bool compareAndSkip(char **ptr, const char *str);
static Bool parseParams(const char *request, char *result, int max_bytes);
static Bool validateString(char *str);
/*
int httpPort = 0;
char *httpDir = NULL;
int httpListenSock = -1;
int httpSock = -1;
FILE* httpFP = NULL;
*/
#define BUF_SIZE 32768
static char buf[BUF_SIZE];
......@@ -163,8 +155,10 @@ httpCheckFds(rfbScreenInfoPtr rfbScreen)
rfbLog("Rejected HTTP connection from client %s\n",
inet_ntoa(addr.sin_addr));
#else
if ((rfbScreen->httpFP = fdopen(rfbScreen->httpSock, "r+")) == NULL) {
rfbLogPerror("httpCheckFds: fdopen");
flags = fcntl(rfbScreen->httpSock, F_SETFL);
if (flags < 0 || fcntl(rfbScreen->httpSock, F_SETFL, flags | O_NONBLOCK) == -1) {
rfbLogPerror("httpCheckFds: fcntl");
#endif
close(rfbScreen->httpSock);
rfbScreen->httpSock = -1;
......@@ -187,9 +181,6 @@ httpCheckFds(rfbScreenInfoPtr rfbScreen)
static void
httpCloseSock(rfbScreenInfoPtr rfbScreen)
{
fclose(rfbScreen->httpFP);
rfbScreen->httpFP = NULL;
/*RemoveEnabledDevice(httpSock);*/
rfbScreen->httpSock = -1;
}
......@@ -231,7 +222,15 @@ httpProcessInput(rfbScreenInfoPtr rfbScreen)
/* Read data from the HTTP client until we get a complete request. */
while (1) {
ssize_t got = read (rfbScreen->httpSock, buf + buf_filled,
ssize_t got;
if (buf_filled > sizeof (buf)) {
rfbLog("httpProcessInput: HTTP request is too long\n");
httpCloseSock(rfbScreen);
return;
}
got = read (rfbScreen->httpSock, buf + buf_filled,
sizeof (buf) - buf_filled - 1);
if (got <= 0) {
......@@ -271,8 +270,6 @@ httpProcessInput(rfbScreenInfoPtr rfbScreen)
rfbLog("httpd: client asked for CONNECT\n");
WriteExact(&cl,PROXY_OK_STR,strlen(PROXY_OK_STR));
rfbNewClientConnection(rfbScreen,rfbScreen->httpSock);
// don't fclose(rfbScreen->httpFP), because this would kill the connection
rfbScreen->httpFP = NULL;
rfbScreen->httpSock = -1;
return;
}
......@@ -281,8 +278,6 @@ httpProcessInput(rfbScreenInfoPtr rfbScreen)
rfbLog("httpd: client asked for /proxied.connection\n");
WriteExact(&cl,PROXY_OK_STR,strlen(PROXY_OK_STR));
rfbNewClientConnection(rfbScreen,rfbScreen->httpSock);
// don't fclose(rfbScreen->httpFP), because this would kill the connection
rfbScreen->httpFP = NULL;
rfbScreen->httpSock = -1;
return;
}
......
main.c
View file @ af85e5fe
......@@ -549,7 +549,6 @@ rfbScreenInfoPtr rfbGetScreen(int* argc,char** argv,
rfbScreen->httpDir=NULL;
rfbScreen->httpListenSock=-1;
rfbScreen->httpSock=-1;
rfbScreen->httpFP=NULL;
rfbScreen->desktopName = "LibVNCServer";
rfbScreen->rfbAlwaysShared = FALSE;
......
rfb.h
View file @ af85e5fe
......@@ -6,6 +6,7 @@
*/
/*
* Copyright (C) 2002 RealVNC Ltd.
* OSXvnc Copyright (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>.
* Original Xvnc code Copyright (C) 1999 AT&T Laboratories Cambridge.
* All Rights Reserved.
......@@ -297,7 +298,6 @@ typedef struct _rfbScreenInfo
char* httpDir;
SOCKET httpListenSock;
SOCKET httpSock;
FILE* httpFP;
PasswordCheckProcPtr passwordCheck;
void* rfbAuthPasswdData;
......@@ -409,6 +409,9 @@ typedef struct _rfbClientRec {
Bool useCopyRect;
int preferredEncoding;
int correMaxWidth, correMaxHeight;
#ifdef HAVE_ZRLE
void* zrleData;
#endif
/* The following member is only used during VNC authentication */
CARD8 authChallenge[CHALLENGESIZE];
......@@ -716,6 +719,11 @@ extern void rfbSetCursor(rfbScreenInfoPtr rfbScreen,rfbCursorPtr c,Bool freeOld)
/* cursor handling for the pointer */
extern void defaultPtrAddEvent(int buttonMask,int x,int y,rfbClientPtr cl);
/* zrle.c */
extern Bool rfbSendRectEncodingZRLE(rfbClientPtr cl, int x, int y, int w,int h);
extern void FreeZrleData(rfbClientPtr cl);
/* stats.c */
extern void rfbResetStats(rfbClientPtr cl);
......
rfbproto.h
View file @ af85e5fe
......@@ -302,6 +302,7 @@ typedef struct {
#ifdef BACKCHANNEL
#define rfbEncodingBackChannel 15
#endif
#define rfbEncodingZRLE 16
/*
* Special encoding numbers:
......@@ -559,6 +560,21 @@ typedef struct {
*/
/*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* ZRLE - encoding combining Zlib compression, tiling, palettisation and
* run-length encoding.
*/
typedef struct {
CARD32 length;
} rfbZRLEHeader;
#define sz_rfbZRLEHeader 4
#define rfbZRLETileWidth 64
#define rfbZRLETileHeight 64
/*-----------------------------------------------------------------------------
* SetColourMapEntries - these messages are only sent if the pixel
* format uses a "colour map" (i.e. trueColour false) and the client has not
......
rfbserver.c
View file @ af85e5fe
......@@ -3,6 +3,7 @@
*/
/*
* Copyright (C) 2002 RealVNC Ltd.
* OSXvnc Copyright (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>.
* Original Xvnc code Copyright (C) 1999 AT&T Laboratories Cambridge.
* All Rights Reserved.
......@@ -257,6 +258,7 @@ rfbNewTCPOrUDPClient(rfbScreen,sock,isUDP)
cl->preferredEncoding = rfbEncodingRaw;
cl->correMaxWidth = 48;
cl->correMaxHeight = 48;
cl->zrleData = 0;
cl->copyRegion = sraRgnCreate();
cl->copyDX = 0;
......@@ -372,6 +374,10 @@ rfbClientConnectionGone(cl)
if (cl->next)
cl->next->prev = cl->prev;
#ifdef HAVE_ZRLE
FreeZrleData(cl);
#endif
#ifdef HAVE_PTHREADS
LOCK(cl->refCountMutex);
if(cl->refCount) {
......@@ -786,6 +792,15 @@ rfbProcessClientNormalMessage(cl)
cl->enableBackChannel = TRUE;
}
break;
#endif
#ifdef HAVE_ZRLE
case rfbEncodingZRLE:
if (cl->preferredEncoding == -1) {
cl->preferredEncoding = enc;
rfbLog("Using ZRLE encoding for client %s\n",
cl->host);
}
break;
#endif
default:
if ( enc >= (CARD32)rfbEncodingCompressLevel0 &&
......@@ -1187,6 +1202,14 @@ rfbSendFramebufferUpdate(cl, givenUpdateRegion)
return FALSE;
}
break;
#ifdef HAVE_ZRLE
case rfbEncodingZRLE:
if (!rfbSendRectEncodingZRLE(cl, x, y, w, h)) {
sraRgnDestroy(updateRegion);
return FALSE;
}
break;
#endif
}
}
sraRgnReleaseIterator(i);
......
stats.c
View file @ af85e5fe
......@@ -3,6 +3,7 @@
*/
/*
* Copyright (C) 2002 RealVNC Ltd.
* OSXvnc Copyright (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>.
* Original Xvnc code Copyright (C) 1999 AT&T Laboratories Cambridge.
* All Rights Reserved.
......@@ -29,7 +30,14 @@
static const char* encNames[] = {
"raw", "copyRect", "RRE", "[encoding 3]", "CoRRE", "hextile",
"zlib", "tight", "[encoding 8]", "[encoding 9]"
"zlib", "tight", "[encoding 8]", "[encoding 9]", "[encoding 10]",
"[encoding 11]", "[encoding 12]", "[encoding 13]", "[encoding 14]",
#ifdef BACKCHANNEL
"BackChannel",
#else
"[encoding 15]",
#endif
"ZRLE", "[encoding 17]", "[encoding 18]", "[encoding 19]", "[encoding 20]"
};
......
zrle.cc 0 → 100644
View file @ af85e5fe
//
// Copyright (C) 2002 RealVNC Ltd. All Rights Reserved.
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This software is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this software; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
//
//
// zrle.cc
//
// Routines to implement Zlib Run-length Encoding (ZRLE).
//
#include <stdio.h>
extern "C" {
#include "rfb.h"
}
#include <rdr/MemOutStream.h>
#include <rdr/ZlibOutStream.h>
#define GET_IMAGE_INTO_BUF(tx,ty,tw,th,buf) \
char *fbptr = (cl->screen->frameBuffer \
+ (cl->screen->paddedWidthInBytes * ty) \
+ (tx * (cl->screen->bitsPerPixel / 8))); \
\
(*cl->translateFn)(cl->translateLookupTable, &cl->screen->rfbServerFormat,\
&cl->format, fbptr, (char*)buf, \
cl->screen->paddedWidthInBytes, tw, th);
#define EXTRA_ARGS , rfbClientPtr cl
#define BPP 8
#include <zrleEncode.h>
#undef BPP
#define BPP 16
#include <zrleEncode.h>
#undef BPP
#define BPP 32
#include <zrleEncode.h>
#define CPIXEL 24A
#include <zrleEncode.h>
#undef CPIXEL
#define CPIXEL 24B
#include <zrleEncode.h>
#undef CPIXEL
#undef BPP
/*
* zrleBeforeBuf contains pixel data in the client's format. It must be at
* least one pixel bigger than the largest tile of pixel data, since the
* ZRLE encoding algorithm writes to the position one past the end of the pixel
* data.
*/
static char zrleBeforeBuf[rfbZRLETileWidth * rfbZRLETileHeight * 4 + 4];
static rdr::MemOutStream mos;
/*
* rfbSendRectEncodingZRLE - send a given rectangle using ZRLE encoding.
*/
Bool rfbSendRectEncodingZRLE(rfbClientPtr cl, int x, int y, int w, int h)
{
if (!cl->zrleData) cl->zrleData = new rdr::ZlibOutStream;
rdr::ZlibOutStream* zos = (rdr::ZlibOutStream*)cl->zrleData;
mos.clear();
switch (cl->format.bitsPerPixel) {
case 8:
zrleEncode8( x, y, w, h, &mos, zos, zrleBeforeBuf, cl);
break;
case 16:
zrleEncode16(x, y, w, h, &mos, zos, zrleBeforeBuf, cl);
break;
case 32:
bool fitsInLS3Bytes
= ((cl->format.redMax << cl->format.redShift) < (1<<24) &&
(cl->format.greenMax << cl->format.greenShift) < (1<<24) &&
(cl->format.blueMax << cl->format.blueShift) < (1<<24));
bool fitsInMS3Bytes = (cl->format.redShift > 7 &&
cl->format.greenShift > 7 &&
cl->format.blueShift > 7);
if ((fitsInLS3Bytes && !cl->format.bigEndian) ||
(fitsInMS3Bytes && cl->format.bigEndian))
{
zrleEncode24A(x, y, w, h, &mos, zos, zrleBeforeBuf, cl);
}
else if ((fitsInLS3Bytes && cl->format.bigEndian) ||
(fitsInMS3Bytes && !cl->format.bigEndian))
{
zrleEncode24B(x, y, w, h, &mos, zos, zrleBeforeBuf, cl);
}
else
{
zrleEncode32(x, y, w, h, &mos, zos, zrleBeforeBuf, cl);
}
break;
}
cl->rfbRectanglesSent[rfbEncodingZRLE]++;
cl->rfbBytesSent[rfbEncodingZRLE] += (sz_rfbFramebufferUpdateRectHeader
+ sz_rfbZRLEHeader + mos.length());
if (cl->ublen + sz_rfbFramebufferUpdateRectHeader + sz_rfbZRLEHeader
> UPDATE_BUF_SIZE)
{
if (!rfbSendUpdateBuf(cl))
return FALSE;
}
rfbFramebufferUpdateRectHeader rect;
rect.r.x = Swap16IfLE(x);
rect.r.y = Swap16IfLE(y);
rect.r.w = Swap16IfLE(w);
rect.r.h = Swap16IfLE(h);
rect.encoding = Swap32IfLE(rfbEncodingZRLE);
memcpy(cl->updateBuf+cl->ublen, (char *)&rect,
sz_rfbFramebufferUpdateRectHeader);
cl->ublen += sz_rfbFramebufferUpdateRectHeader;
rfbZRLEHeader hdr;
hdr.length = Swap32IfLE(mos.length());
memcpy(cl->updateBuf+cl->ublen, (char *)&hdr, sz_rfbZRLEHeader);
cl->ublen += sz_rfbZRLEHeader;
// copy into updateBuf and send from there. Maybe should send directly?
for (int i = 0; i < mos.length();) {
int bytesToCopy = UPDATE_BUF_SIZE - cl->ublen;
if (i + bytesToCopy > mos.length()) {
bytesToCopy = mos.length() - i;
}
memcpy(cl->updateBuf+cl->ublen, (CARD8*)mos.data() + i, bytesToCopy);
cl->ublen += bytesToCopy;
i += bytesToCopy;
if (cl->ublen == UPDATE_BUF_SIZE) {
if (!rfbSendUpdateBuf(cl))
return FALSE;
}
}
return TRUE;
}
void FreeZrleData(rfbClientPtr cl)
{
delete (rdr::ZlibOutStream*)cl->zrleData;
}
zrleDecode.h 0 → 100644
View file @ af85e5fe
//
// Copyright (C) 2002 RealVNC Ltd. All Rights Reserved.
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This software is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this software; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
//
// zrleDecode.h - zrle decoding function.
//
// Before including this file, you must define a number of CPP macros.
//
// BPP should be 8, 16 or 32 depending on the bits per pixel.
// FILL_RECT
// IMAGE_RECT
#include <rdr/ZlibInStream.h>
#include <rdr/InStream.h>
#include <assert.h>
using namespace rdr;
/* __RFB_CONCAT2 concatenates its two arguments. __RFB_CONCAT2E does the same
but also expands its arguments if they are macros */
#ifndef __RFB_CONCAT2E
#define __RFB_CONCAT2(a,b) a##b
#define __RFB_CONCAT2E(a,b) __RFB_CONCAT2(a,b)
#endif
#ifdef CPIXEL
#define PIXEL_T __RFB_CONCAT2E(rdr::U,BPP)
#define READ_PIXEL __RFB_CONCAT2E(readOpaque,CPIXEL)
#define ZRLE_DECODE_BPP __RFB_CONCAT2E(zrleDecode,CPIXEL)
#else
#define PIXEL_T __RFB_CONCAT2E(rdr::U,BPP)
#define READ_PIXEL __RFB_CONCAT2E(readOpaque,BPP)
#define ZRLE_DECODE_BPP __RFB_CONCAT2E(zrleDecode,BPP)
#endif
void ZRLE_DECODE_BPP (int x, int y, int w, int h, rdr::InStream* is,
rdr::ZlibInStream* zis, PIXEL_T* buf)
{
int length = is->readU32();
zis->setUnderlying(is, length);
for (int ty = y; ty < y+h; ty += rfbZRLETileHeight) {
int th = rfbZRLETileHeight;
if (th > y+h-ty) th = y+h-ty;
for (int tx = x; tx < x+w; tx += rfbZRLETileWidth) {
int tw = rfbZRLETileWidth;
if (tw > x+w-tx) tw = x+w-tx;
int mode = zis->readU8();
bool rle = mode & 128;
int palSize = mode & 127;
PIXEL_T palette[128];
// fprintf(stderr,"rle %d palSize %d\n",rle,palSize);
for (int i = 0; i < palSize; i++) {
palette[i] = zis->READ_PIXEL();
}
if (palSize == 1) {
PIXEL_T pix = palette[0];
FILL_RECT(tx,ty,tw,th,pix);
continue;
}
if (!rle) {
if (palSize == 0) {
// raw
#ifdef CPIXEL
for (PIXEL_T* ptr = buf; ptr < buf+tw*th; ptr++) {
*ptr = zis->READ_PIXEL();
}
#else
zis->readBytes(buf, tw * th * (BPP / 8));
#endif
} else {
// packed pixels
int bppp = ((palSize > 16) ? 8 :
((palSize > 4) ? 4 : ((palSize > 2) ? 2 : 1)));
PIXEL_T* ptr = buf;
for (int i = 0; i < th; i++) {
PIXEL_T* eol = ptr + tw;
U8 byte = 0;
U8 nbits = 0;
while (ptr < eol) {
if (nbits == 0) {
byte = zis->readU8();
nbits = 8;
}
nbits -= bppp;
U8 index = (byte >> nbits) & ((1 << bppp) - 1) & 127;
*ptr++ = palette[index];
}
}
}
#ifdef FAVOUR_FILL_RECT
//fprintf(stderr,"copying data to screen %dx%d at %d,%d\n",tw,th,tx,ty);
IMAGE_RECT(tx,ty,tw,th,buf);
#endif
} else {
if (palSize == 0) {
// plain RLE
PIXEL_T* ptr = buf;
PIXEL_T* end = ptr + th * tw;
while (ptr < end) {
PIXEL_T pix = zis->READ_PIXEL();
int len = 1;
int b;
do {
b = zis->readU8();
len += b;
} while (b == 255);
assert(len <= end - ptr);
#ifdef FAVOUR_FILL_RECT
int i = ptr - buf;
ptr += len;
int runX = i % tw;
int runY = i / tw;
if (runX + len > tw) {
if (runX != 0) {
FILL_RECT(tx+runX, ty+runY, tw-runX, 1, pix);
len -= tw-runX;
runX = 0;
runY++;
}
if (len > tw) {
FILL_RECT(tx, ty+runY, tw, len/tw, pix);
runY += len / tw;
len = len % tw;
}
}
if (len != 0) {
FILL_RECT(tx+runX, ty+runY, len, 1, pix);
}
#else
while (len-- > 0) *ptr++ = pix;
#endif
}
} else {
// palette RLE
PIXEL_T* ptr = buf;
PIXEL_T* end = ptr + th * tw;
while (ptr < end) {
int index = zis->readU8();
int len = 1;
if (index & 128) {
int b;
do {
b = zis->readU8();
len += b;
} while (b == 255);
assert(len <= end - ptr);
}
index &= 127;
PIXEL_T pix = palette[index];
#ifdef FAVOUR_FILL_RECT
int i = ptr - buf;
ptr += len;
int runX = i % tw;
int runY = i / tw;
if (runX + len > tw) {
if (runX != 0) {
FILL_RECT(tx+runX, ty+runY, tw-runX, 1, pix);
len -= tw-runX;
runX = 0;
runY++;
}
if (len > tw) {
FILL_RECT(tx, ty+runY, tw, len/tw, pix);
runY += len / tw;
len = len % tw;
}
}
if (len != 0) {
FILL_RECT(tx+runX, ty+runY, len, 1, pix);
}
#else
while (len-- > 0) *ptr++ = pix;
#endif
}
}
}
#ifndef FAVOUR_FILL_RECT
//fprintf(stderr,"copying data to screen %dx%d at %d,%d\n",tw,th,tx,ty);
IMAGE_RECT(tx,ty,tw,th,buf);
#endif
}
}
zis->reset();
}
#undef ZRLE_DECODE_BPP
#undef READ_PIXEL
#undef PIXEL_T
zrleEncode.h 0 → 100644
View file @ af85e5fe
//
// Copyright (C) 2002 RealVNC Ltd. All Rights Reserved.
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This software is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this software; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
//
// zrleEncode.h - zrle encoding function.
//
// Before including this file, you must define a number of CPP macros.
//
// BPP should be 8, 16 or 32 depending on the bits per pixel.
// GET_IMAGE_INTO_BUF should be some code which gets a rectangle of pixel data
// into the given buffer. EXTRA_ARGS can be defined to pass any other
// arguments needed by GET_IMAGE_INTO_BUF.
//
// Note that the buf argument to ZRLE_ENCODE needs to be at least one pixel
// bigger than the largest tile of pixel data, since the ZRLE encoding
// algorithm writes to the position one past the end of the pixel data.
//
#include <rdr/OutStream.h>
#include <assert.h>
using namespace rdr;
/* __RFB_CONCAT2 concatenates its two arguments. __RFB_CONCAT2E does the same
but also expands its arguments if they are macros */
#ifndef __RFB_CONCAT2E
#define __RFB_CONCAT2(a,b) a##b
#define __RFB_CONCAT2E(a,b) __RFB_CONCAT2(a,b)
#endif
#ifdef CPIXEL
#define PIXEL_T __RFB_CONCAT2E(rdr::U,BPP)
#define WRITE_PIXEL __RFB_CONCAT2E(writeOpaque,CPIXEL)
#define ZRLE_ENCODE __RFB_CONCAT2E(zrleEncode,CPIXEL)
#define ZRLE_ENCODE_TILE __RFB_CONCAT2E(zrleEncodeTile,CPIXEL)
#define BPPOUT 24
#else
#define PIXEL_T __RFB_CONCAT2E(rdr::U,BPP)
#define WRITE_PIXEL __RFB_CONCAT2E(writeOpaque,BPP)
#define ZRLE_ENCODE __RFB_CONCAT2E(zrleEncode,BPP)
#define ZRLE_ENCODE_TILE __RFB_CONCAT2E(zrleEncodeTile,BPP)
#define BPPOUT BPP
#endif
#ifndef ZRLE_ONCE
#define ZRLE_ONCE
static const int bitsPerPackedPixel[] = {
0, 1, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4
};
// The PaletteHelper class helps us build up the palette from pixel data by
// storing a reverse index using a simple hash-table
class PaletteHelper {
public:
enum { MAX_SIZE = 127 };
PaletteHelper()
{
memset(index, 255, sizeof(index));
size = 0;
}
inline int hash(rdr::U32 pix)
{
return (pix ^ (pix >> 17)) & 4095;
}
inline void insert(rdr::U32 pix)
{
if (size < MAX_SIZE) {
int i = hash(pix);
while (index[i] != 255 && key[i] != pix)
i++;
if (index[i] != 255) return;
index[i] = size;
key[i] = pix;
palette[size] = pix;
}
size++;
}
inline int lookup(rdr::U32 pix)
{
assert(size <= MAX_SIZE);
int i = hash(pix);
while (index[i] != 255 && key[i] != pix)
i++;
if (index[i] != 255) return index[i];
return -1;
}
rdr::U32 palette[MAX_SIZE];
rdr::U8 index[4096+MAX_SIZE];
rdr::U32 key[4096+MAX_SIZE];
int size;
};
#endif
void ZRLE_ENCODE_TILE (PIXEL_T* data, int w, int h, rdr::OutStream* os);
void ZRLE_ENCODE (int x, int y, int w, int h, rdr::OutStream* os,
rdr::ZlibOutStream* zos, void* buf
EXTRA_ARGS
)
{
zos->setUnderlying(os);
for (int ty = y; ty < y+h; ty += rfbZRLETileHeight) {
int th = rfbZRLETileHeight;
if (th > y+h-ty) th = y+h-ty;
for (int tx = x; tx < x+w; tx += rfbZRLETileWidth) {
int tw = rfbZRLETileWidth;
if (tw > x+w-tx) tw = x+w-tx;
GET_IMAGE_INTO_BUF(tx,ty,tw,th,buf);
ZRLE_ENCODE_TILE((PIXEL_T*)buf, tw, th, zos);
}
}
zos->flush();
}
void ZRLE_ENCODE_TILE (PIXEL_T* data, int w, int h, rdr::OutStream* os)
{
// First find the palette and the number of runs
PaletteHelper ph;
int runs = 0;
int singlePixels = 0;
PIXEL_T* ptr = data;
PIXEL_T* end = ptr + h * w;
*end = ~*(end-1); // one past the end is different so the while loop ends
while (ptr < end) {
PIXEL_T pix = *ptr;
if (*++ptr != pix) {
singlePixels++;
} else {
while (*++ptr == pix) ;
runs++;
}
ph.insert(pix);
}
//fprintf(stderr,"runs %d, single pixels %d, paletteSize %d\n",
// runs, singlePixels, ph.size);
// Solid tile is a special case
if (ph.size == 1) {
os->writeU8(1);
os->WRITE_PIXEL(ph.palette[0]);
return;
}
// Try to work out whether to use RLE and/or a palette. We do this by
// estimating the number of bytes which will be generated and picking the
// method which results in the fewest bytes. Of course this may not result
// in the fewest bytes after compression...
bool useRle = false;
bool usePalette = false;
int estimatedBytes = w * h * (BPPOUT/8); // start assuming raw
int plainRleBytes = ((BPPOUT/8)+1) * (runs + singlePixels);
if (plainRleBytes < estimatedBytes) {
useRle = true;
estimatedBytes = plainRleBytes;
}
if (ph.size < 128) {
int paletteRleBytes = (BPPOUT/8) * ph.size + 2 * runs + singlePixels;
if (paletteRleBytes < estimatedBytes) {
useRle = true;
usePalette = true;
estimatedBytes = paletteRleBytes;
}
if (ph.size < 17) {
int packedBytes = ((BPPOUT/8) * ph.size +
w * h * bitsPerPackedPixel[ph.size-1] / 8);
if (packedBytes < estimatedBytes) {
useRle = false;
usePalette = true;
estimatedBytes = packedBytes;
}
}
}
if (!usePalette) ph.size = 0;
os->writeU8((useRle ? 128 : 0) | ph.size);
for (int i = 0; i < ph.size; i++) {
os->WRITE_PIXEL(ph.palette[i]);
}
if (useRle) {
PIXEL_T* ptr = data;
PIXEL_T* end = ptr + w * h;
PIXEL_T* runStart;
PIXEL_T pix;
while (ptr < end) {
runStart = ptr;
pix = *ptr++;
while (*ptr == pix && ptr < end)
ptr++;
int len = ptr - runStart;
if (len <= 2 && usePalette) {
int index = ph.lookup(pix);
if (len == 2)
os->writeU8(index);
os->writeU8(index);
continue;
}
if (usePalette) {
int index = ph.lookup(pix);
os->writeU8(index | 128);
} else {
os->WRITE_PIXEL(pix);
}
len -= 1;
while (len >= 255) {
os->writeU8(255);
len -= 255;
}
os->writeU8(len);
}
} else {
// no RLE
if (usePalette) {
// packed pixels
assert (ph.size < 17);
int bppp = bitsPerPackedPixel[ph.size-1];
PIXEL_T* ptr = data;
for (int i = 0; i < h; i++) {
U8 nbits = 0;
U8 byte = 0;
PIXEL_T* eol = ptr + w;
while (ptr < eol) {
PIXEL_T pix = *ptr++;
U8 index = ph.lookup(pix);
byte = (byte << bppp) | index;
nbits += bppp;
if (nbits >= 8) {
os->writeU8(byte);
nbits = 0;
}
}
if (nbits > 0) {
byte <<= 8 - nbits;
os->writeU8(byte);
}
}
} else {
// raw
#ifdef CPIXEL
for (PIXEL_T* ptr = data; ptr < data+w*h; ptr++) {
os->WRITE_PIXEL(*ptr);
}
#else
os->writeBytes(data, w*h*(BPP/8));
#endif
}
}
}
#undef PIXEL_T
#undef WRITE_PIXEL
#undef ZRLE_ENCODE
#undef ZRLE_ENCODE_TILE
#undef BPPOUT
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