You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
428 lines
10 KiB
428 lines
10 KiB
/*
|
|
* Copyright (C) 2005 Johannes E. Schindelin. 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.
|
|
*/
|
|
|
|
#ifdef LIBVNCSERVER_HAVE_LIBZ
|
|
|
|
/*
|
|
* zrle.c - handle zrle encoding.
|
|
*
|
|
* This file shouldn't be compiled directly. It is included multiple times by
|
|
* rfbproto.c, each time with a different definition of the macro BPP. For
|
|
* each value of BPP, this file defines a function which handles an zrle
|
|
* encoded rectangle with BPP bits per pixel.
|
|
*/
|
|
|
|
#ifndef REALBPP
|
|
#define REALBPP BPP
|
|
#endif
|
|
|
|
#if !defined(UNCOMP) || UNCOMP==0
|
|
#define HandleZRLE CONCAT2E(HandleZRLE,REALBPP)
|
|
#define HandleZRLETile CONCAT2E(HandleZRLETile,REALBPP)
|
|
#elif UNCOMP>0
|
|
#define HandleZRLE CONCAT3E(HandleZRLE,REALBPP,Down)
|
|
#define HandleZRLETile CONCAT3E(HandleZRLETile,REALBPP,Down)
|
|
#else
|
|
#define HandleZRLE CONCAT3E(HandleZRLE,REALBPP,Up)
|
|
#define HandleZRLETile CONCAT3E(HandleZRLETile,REALBPP,Up)
|
|
#endif
|
|
#define CARDBPP CONCAT3E(uint,BPP,_t)
|
|
#define CARDREALBPP CONCAT3E(uint,REALBPP,_t)
|
|
|
|
#define ENDIAN_LITTLE 0
|
|
#define ENDIAN_BIG 1
|
|
#define ENDIAN_NO 2
|
|
#define ZYWRLE_ENDIAN ENDIAN_LITTLE
|
|
#undef END_FIX
|
|
#if ZYWRLE_ENDIAN == ENDIAN_LITTLE
|
|
# define END_FIX LE
|
|
#elif ZYWRLE_ENDIAN == ENDIAN_BIG
|
|
# define END_FIX BE
|
|
#else
|
|
# define END_FIX NE
|
|
#endif
|
|
#define __RFB_CONCAT3E(a,b,c) CONCAT3E(a,b,c)
|
|
#define __RFB_CONCAT2E(a,b) CONCAT2E(a,b)
|
|
#undef CPIXEL
|
|
#if REALBPP != BPP
|
|
#if UNCOMP == 0
|
|
#define CPIXEL REALBPP
|
|
#elif UNCOMP>0
|
|
#define CPIXEL CONCAT2E(REALBPP,Down)
|
|
#else
|
|
#define CPIXEL CONCAT2E(REALBPP,Up)
|
|
#endif
|
|
#endif
|
|
#define PIXEL_T __RFB_CONCAT3E(uint,BPP,_t)
|
|
#if BPP!=8
|
|
#define ZYWRLE_DECODE 1
|
|
#include "zywrletemplate.c"
|
|
#endif
|
|
#undef CPIXEL
|
|
|
|
static int HandleZRLETile(rfbClient* client,
|
|
uint8_t* buffer,size_t buffer_length,
|
|
int x,int y,int w,int h);
|
|
|
|
static rfbBool
|
|
HandleZRLE (rfbClient* client, int rx, int ry, int rw, int rh)
|
|
{
|
|
rfbZRLEHeader header;
|
|
int remaining;
|
|
int inflateResult;
|
|
int toRead;
|
|
int min_buffer_size = rw * rh * (REALBPP / 8) * 2;
|
|
|
|
/* First make sure we have a large enough raw buffer to hold the
|
|
* decompressed data. In practice, with a fixed REALBPP, fixed frame
|
|
* buffer size and the first update containing the entire frame
|
|
* buffer, this buffer allocation should only happen once, on the
|
|
* first update.
|
|
*/
|
|
if ( client->raw_buffer_size < min_buffer_size) {
|
|
|
|
if ( client->raw_buffer != NULL ) {
|
|
|
|
free( client->raw_buffer );
|
|
|
|
}
|
|
|
|
client->raw_buffer_size = min_buffer_size;
|
|
client->raw_buffer = (char*) malloc( client->raw_buffer_size );
|
|
|
|
}
|
|
|
|
if (!ReadFromRFBServer(client, (char *)&header, sz_rfbZRLEHeader))
|
|
return FALSE;
|
|
|
|
remaining = rfbClientSwap32IfLE(header.length);
|
|
|
|
/* Need to initialize the decompressor state. */
|
|
client->decompStream.next_in = ( Bytef * )client->buffer;
|
|
client->decompStream.avail_in = 0;
|
|
client->decompStream.next_out = ( Bytef * )client->raw_buffer;
|
|
client->decompStream.avail_out = client->raw_buffer_size;
|
|
client->decompStream.data_type = Z_BINARY;
|
|
|
|
/* Initialize the decompression stream structures on the first invocation. */
|
|
if ( client->decompStreamInited == FALSE ) {
|
|
|
|
inflateResult = inflateInit( &client->decompStream );
|
|
|
|
if ( inflateResult != Z_OK ) {
|
|
rfbClientLog(
|
|
"inflateInit returned error: %d, msg: %s\n",
|
|
inflateResult,
|
|
client->decompStream.msg);
|
|
return FALSE;
|
|
}
|
|
|
|
client->decompStreamInited = TRUE;
|
|
|
|
}
|
|
|
|
inflateResult = Z_OK;
|
|
|
|
/* Process buffer full of data until no more to process, or
|
|
* some type of inflater error, or Z_STREAM_END.
|
|
*/
|
|
while (( remaining > 0 ) &&
|
|
( inflateResult == Z_OK )) {
|
|
|
|
if ( remaining > RFB_BUFFER_SIZE ) {
|
|
toRead = RFB_BUFFER_SIZE;
|
|
}
|
|
else {
|
|
toRead = remaining;
|
|
}
|
|
|
|
/* Fill the buffer, obtaining data from the server. */
|
|
if (!ReadFromRFBServer(client, client->buffer,toRead))
|
|
return FALSE;
|
|
|
|
client->decompStream.next_in = ( Bytef * )client->buffer;
|
|
client->decompStream.avail_in = toRead;
|
|
|
|
/* Need to uncompress buffer full. */
|
|
inflateResult = inflate( &client->decompStream, Z_SYNC_FLUSH );
|
|
|
|
/* We never supply a dictionary for compression. */
|
|
if ( inflateResult == Z_NEED_DICT ) {
|
|
rfbClientLog("zlib inflate needs a dictionary!\n");
|
|
return FALSE;
|
|
}
|
|
if ( inflateResult < 0 ) {
|
|
rfbClientLog(
|
|
"zlib inflate returned error: %d, msg: %s\n",
|
|
inflateResult,
|
|
client->decompStream.msg);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Result buffer allocated to be at least large enough. We should
|
|
* never run out of space!
|
|
*/
|
|
if (( client->decompStream.avail_in > 0 ) &&
|
|
( client->decompStream.avail_out <= 0 )) {
|
|
rfbClientLog("zlib inflate ran out of space!\n");
|
|
return FALSE;
|
|
}
|
|
|
|
remaining -= toRead;
|
|
|
|
} /* while ( remaining > 0 ) */
|
|
|
|
if ( inflateResult == Z_OK ) {
|
|
void* buf=client->raw_buffer;
|
|
int i,j;
|
|
|
|
remaining = client->raw_buffer_size-client->decompStream.avail_out;
|
|
|
|
for(j=0; j<rh; j+=rfbZRLETileHeight)
|
|
for(i=0; i<rw; i+=rfbZRLETileWidth) {
|
|
int subWidth=(i+rfbZRLETileWidth>rw)?rw-i:rfbZRLETileWidth;
|
|
int subHeight=(j+rfbZRLETileHeight>rh)?rh-j:rfbZRLETileHeight;
|
|
int result=HandleZRLETile(client,buf,remaining,rx+i,ry+j,subWidth,subHeight);
|
|
|
|
if(result<0) {
|
|
rfbClientLog("ZRLE decoding failed (%d)\n",result);
|
|
return TRUE;
|
|
return FALSE;
|
|
}
|
|
|
|
buf+=result;
|
|
remaining-=result;
|
|
}
|
|
}
|
|
else {
|
|
|
|
rfbClientLog(
|
|
"zlib inflate returned error: %d, msg: %s\n",
|
|
inflateResult,
|
|
client->decompStream.msg);
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#if REALBPP!=BPP && defined(UNCOMP) && UNCOMP!=0
|
|
#if UNCOMP>0
|
|
#define UncompressCPixel(pointer) ((*(CARDBPP*)pointer)>>UNCOMP)
|
|
#else
|
|
#define UncompressCPixel(pointer) ((*(CARDBPP*)pointer)<<(-(UNCOMP)))
|
|
#endif
|
|
#else
|
|
#define UncompressCPixel(pointer) (*(CARDBPP*)pointer)
|
|
#endif
|
|
|
|
static int HandleZRLETile(rfbClient* client,
|
|
uint8_t* buffer,size_t buffer_length,
|
|
int x,int y,int w,int h) {
|
|
uint8_t* buffer_copy = buffer;
|
|
uint8_t* buffer_end = buffer+buffer_length;
|
|
uint8_t type;
|
|
#if BPP!=8
|
|
uint8_t zywrle_level = (client->appData.qualityLevel & 0x80) ?
|
|
0 : (3 - client->appData.qualityLevel / 3);
|
|
#endif
|
|
|
|
if(buffer_length<1)
|
|
return -2;
|
|
|
|
type = *buffer;
|
|
buffer++;
|
|
{
|
|
if( type == 0 ) /* raw */
|
|
#if BPP!=8
|
|
if( zywrle_level > 0 ){
|
|
CARDBPP* pFrame = (CARDBPP*)client->frameBuffer + y*client->width+x;
|
|
int ret;
|
|
client->appData.qualityLevel |= 0x80;
|
|
ret = HandleZRLETile(client, buffer, buffer_end-buffer, x, y, w, h);
|
|
client->appData.qualityLevel &= 0x7F;
|
|
if( ret < 0 ){
|
|
return ret;
|
|
}
|
|
ZYWRLE_SYNTHESIZE( pFrame, pFrame, w, h, client->width, zywrle_level, (int*)client->zlib_buffer );
|
|
buffer += ret;
|
|
}else
|
|
#endif
|
|
{
|
|
#if REALBPP!=BPP
|
|
int i,j;
|
|
|
|
if(1+w*h*REALBPP/8>buffer_length) {
|
|
rfbClientLog("expected %d bytes, got only %d (%dx%d)\n",1+w*h*REALBPP/8,buffer_length,w,h);
|
|
return -3;
|
|
}
|
|
|
|
for(j=y*client->width; j<(y+h)*client->width; j+=client->width)
|
|
for(i=x; i<x+w; i++,buffer+=REALBPP/8)
|
|
((CARDBPP*)client->frameBuffer)[j+i] = UncompressCPixel(buffer);
|
|
#else
|
|
CopyRectangle(client, buffer, x, y, w, h);
|
|
buffer+=w*h*REALBPP/8;
|
|
#endif
|
|
}
|
|
else if( type == 1 ) /* solid */
|
|
{
|
|
CARDBPP color = UncompressCPixel(buffer);
|
|
|
|
if(1+REALBPP/8>buffer_length)
|
|
return -4;
|
|
|
|
FillRectangle(client, x, y, w, h, color);
|
|
|
|
buffer+=REALBPP/8;
|
|
|
|
}
|
|
else if( (type >= 2)&&(type <= 127) ) /* packed Palette */
|
|
{
|
|
CARDBPP palette[16];
|
|
int i,j,shift,
|
|
bpp=(type>4?(type>16?8:4):(type>2?2:1)),
|
|
mask=(1<<bpp)-1,
|
|
divider=(8/bpp);
|
|
|
|
if(1+type*REALBPP/8+((w+divider-1)/divider)*h>buffer_length)
|
|
return -5;
|
|
|
|
/* read palette */
|
|
for(i=0; i<type; i++,buffer+=REALBPP/8)
|
|
palette[i] = UncompressCPixel(buffer);
|
|
|
|
/* read palettized pixels */
|
|
for(j=y*client->width; j<(y+h)*client->width; j+=client->width) {
|
|
for(i=x,shift=8-bpp; i<x+w; i++) {
|
|
((CARDBPP*)client->frameBuffer)[j+i] = palette[((*buffer)>>shift)&mask];
|
|
shift-=bpp;
|
|
if(shift<0) {
|
|
shift=8-bpp;
|
|
buffer++;
|
|
}
|
|
}
|
|
if(shift<8-bpp)
|
|
buffer++;
|
|
}
|
|
|
|
}
|
|
/* case 17 ... 127: not used, but valid */
|
|
else if( type == 128 ) /* plain RLE */
|
|
{
|
|
int i=0,j=0;
|
|
while(j<h) {
|
|
int color,length;
|
|
/* read color */
|
|
if(buffer+REALBPP/8+1>buffer_end)
|
|
return -7;
|
|
color = UncompressCPixel(buffer);
|
|
buffer+=REALBPP/8;
|
|
/* read run length */
|
|
length=1;
|
|
while(*buffer==0xff) {
|
|
if(buffer+1>=buffer_end)
|
|
return -8;
|
|
length+=*buffer;
|
|
buffer++;
|
|
}
|
|
length+=*buffer;
|
|
buffer++;
|
|
while(j<h && length>0) {
|
|
((CARDBPP*)client->frameBuffer)[(y+j)*client->width+x+i] = color;
|
|
length--;
|
|
i++;
|
|
if(i>=w) {
|
|
i=0;
|
|
j++;
|
|
}
|
|
}
|
|
if(length>0)
|
|
rfbClientLog("Warning: possible ZRLE corruption\n");
|
|
}
|
|
|
|
}
|
|
else if( type == 129 ) /* unused */
|
|
{
|
|
return -8;
|
|
}
|
|
else if( (type >= 130)&&(type <= 255) ) /* palette RLE */
|
|
{
|
|
CARDBPP palette[128];
|
|
int i,j;
|
|
|
|
if(2+(type-128)*REALBPP/8>buffer_length)
|
|
return -9;
|
|
|
|
/* read palette */
|
|
for(i=0; i<type-128; i++,buffer+=REALBPP/8)
|
|
palette[i] = UncompressCPixel(buffer);
|
|
/* read palettized pixels */
|
|
i=j=0;
|
|
while(j<h) {
|
|
int color,length;
|
|
/* read color */
|
|
if(buffer>=buffer_end)
|
|
return -10;
|
|
color = palette[(*buffer)&0x7f];
|
|
length=1;
|
|
if(*buffer&0x80) {
|
|
if(buffer+1>=buffer_end)
|
|
return -11;
|
|
buffer++;
|
|
/* read run length */
|
|
while(*buffer==0xff) {
|
|
if(buffer+1>=buffer_end)
|
|
return -8;
|
|
length+=*buffer;
|
|
buffer++;
|
|
}
|
|
length+=*buffer;
|
|
}
|
|
buffer++;
|
|
while(j<h && length>0) {
|
|
((CARDBPP*)client->frameBuffer)[(y+j)*client->width+x+i] = color;
|
|
length--;
|
|
i++;
|
|
if(i>=w) {
|
|
i=0;
|
|
j++;
|
|
}
|
|
}
|
|
if(length>0)
|
|
rfbClientLog("Warning: possible ZRLE corruption\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
return buffer-buffer_copy;
|
|
}
|
|
|
|
#undef CARDBPP
|
|
#undef CARDREALBPP
|
|
#undef HandleZRLE
|
|
#undef HandleZRLETile
|
|
#undef UncompressCPixel
|
|
#undef REALBPP
|
|
|
|
#endif
|
|
|
|
#undef UNCOMP
|