| /* |
| * Copyright (C) 2000 Tridia Corporation. All Rights Reserved. |
| * Copyright (C) 1999 AT&T Laboratories Cambridge. 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. |
| */ |
| |
| /* |
| * ultrazip.c - handle ultrazip 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 zlib |
| * encoded rectangle with BPP bits per pixel. |
| */ |
| |
| #define HandleUltraZipBPP CONCAT2E(HandleUltraZip,BPP) |
| #define HandleUltraBPP CONCAT2E(HandleUltra,BPP) |
| #define CARDBPP CONCAT3E(uint,BPP,_t) |
| |
| static rfbBool |
| HandleUltraBPP (rfbClient* client, int rx, int ry, int rw, int rh) |
| { |
| rfbZlibHeader hdr; |
| int toRead=0; |
| int inflateResult=0; |
| lzo_uint uncompressedBytes = (( rw * rh ) * ( BPP / 8 )); |
| |
| if (!ReadFromRFBServer(client, (char *)&hdr, sz_rfbZlibHeader)) |
| return FALSE; |
| |
| toRead = rfbClientSwap32IfLE(hdr.nBytes); |
| if (toRead==0) return TRUE; |
| |
| if (uncompressedBytes==0) |
| { |
| rfbClientLog("ultra error: rectangle has 0 uncomressed bytes ((%dw * %dh) * (%d / 8))\n", rw, rh, BPP); |
| return FALSE; |
| } |
| |
| /* First make sure we have a large enough raw buffer to hold the |
| * decompressed data. In practice, with a fixed BPP, 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 < (int)uncompressedBytes) { |
| if ( client->raw_buffer != NULL ) { |
| free( client->raw_buffer ); |
| } |
| client->raw_buffer_size = uncompressedBytes; |
| /* buffer needs to be aligned on 4-byte boundaries */ |
| if ((client->raw_buffer_size % 4)!=0) |
| client->raw_buffer_size += (4-(client->raw_buffer_size % 4)); |
| client->raw_buffer = (char*) malloc( client->raw_buffer_size ); |
| } |
| |
| /* allocate enough space to store the incoming compressed packet */ |
| if ( client->ultra_buffer_size < toRead ) { |
| if ( client->ultra_buffer != NULL ) { |
| free( client->ultra_buffer ); |
| } |
| client->ultra_buffer_size = toRead; |
| /* buffer needs to be aligned on 4-byte boundaries */ |
| if ((client->ultra_buffer_size % 4)!=0) |
| client->ultra_buffer_size += (4-(client->ultra_buffer_size % 4)); |
| client->ultra_buffer = (char*) malloc( client->ultra_buffer_size ); |
| } |
| |
| /* Fill the buffer, obtaining data from the server. */ |
| if (!ReadFromRFBServer(client, client->ultra_buffer, toRead)) |
| return FALSE; |
| |
| /* uncompress the data */ |
| uncompressedBytes = client->raw_buffer_size; |
| inflateResult = lzo1x_decompress( |
| (lzo_byte *)client->ultra_buffer, toRead, |
| (lzo_byte *)client->raw_buffer, (lzo_uintp) &uncompressedBytes, |
| NULL); |
| |
| |
| if ((rw * rh * (BPP / 8)) != uncompressedBytes) |
| rfbClientLog("Ultra decompressed too little (%d < %d)", (rw * rh * (BPP / 8)), uncompressedBytes); |
| |
| /* Put the uncompressed contents of the update on the screen. */ |
| if ( inflateResult == LZO_E_OK ) |
| { |
| CopyRectangle(client, (unsigned char *)client->raw_buffer, rx, ry, rw, rh); |
| } |
| else |
| { |
| rfbClientLog("ultra decompress returned error: %d\n", |
| inflateResult); |
| return FALSE; |
| } |
| return TRUE; |
| } |
| |
| |
| /* UltraZip is like rre in that it is composed of subrects */ |
| static rfbBool |
| HandleUltraZipBPP (rfbClient* client, int rx, int ry, int rw, int rh) |
| { |
| rfbZlibHeader hdr; |
| int i=0; |
| int toRead=0; |
| int inflateResult=0; |
| unsigned char *ptr=NULL; |
| lzo_uint uncompressedBytes = ry + (rw * 65535); |
| unsigned int numCacheRects = rx; |
| |
| if (!ReadFromRFBServer(client, (char *)&hdr, sz_rfbZlibHeader)) |
| return FALSE; |
| |
| toRead = rfbClientSwap32IfLE(hdr.nBytes); |
| |
| if (toRead==0) return TRUE; |
| |
| if (uncompressedBytes==0) |
| { |
| rfbClientLog("ultrazip error: rectangle has 0 uncomressed bytes (%dy + (%dw * 65535)) (%d rectangles)\n", ry, rw, rx); |
| return FALSE; |
| } |
| |
| /* First make sure we have a large enough raw buffer to hold the |
| * decompressed data. In practice, with a fixed BPP, 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 < (int)(uncompressedBytes + 500)) { |
| if ( client->raw_buffer != NULL ) { |
| free( client->raw_buffer ); |
| } |
| client->raw_buffer_size = uncompressedBytes + 500; |
| /* buffer needs to be aligned on 4-byte boundaries */ |
| if ((client->raw_buffer_size % 4)!=0) |
| client->raw_buffer_size += (4-(client->raw_buffer_size % 4)); |
| client->raw_buffer = (char*) malloc( client->raw_buffer_size ); |
| } |
| |
| |
| /* allocate enough space to store the incoming compressed packet */ |
| if ( client->ultra_buffer_size < toRead ) { |
| if ( client->ultra_buffer != NULL ) { |
| free( client->ultra_buffer ); |
| } |
| client->ultra_buffer_size = toRead; |
| client->ultra_buffer = (char*) malloc( client->ultra_buffer_size ); |
| } |
| |
| /* Fill the buffer, obtaining data from the server. */ |
| if (!ReadFromRFBServer(client, client->ultra_buffer, toRead)) |
| return FALSE; |
| |
| /* uncompress the data */ |
| uncompressedBytes = client->raw_buffer_size; |
| inflateResult = lzo1x_decompress( |
| (lzo_byte *)client->ultra_buffer, toRead, |
| (lzo_byte *)client->raw_buffer, &uncompressedBytes, NULL); |
| if ( inflateResult != LZO_E_OK ) |
| { |
| rfbClientLog("ultra decompress returned error: %d\n", |
| inflateResult); |
| return FALSE; |
| } |
| |
| /* Put the uncompressed contents of the update on the screen. */ |
| ptr = (unsigned char *)client->raw_buffer; |
| for (i=0; i<numCacheRects; i++) |
| { |
| unsigned short sx, sy, sw, sh; |
| unsigned int se; |
| |
| memcpy((char *)&sx, ptr, 2); ptr += 2; |
| memcpy((char *)&sy, ptr, 2); ptr += 2; |
| memcpy((char *)&sw, ptr, 2); ptr += 2; |
| memcpy((char *)&sh, ptr, 2); ptr += 2; |
| memcpy((char *)&se, ptr, 4); ptr += 4; |
| |
| sx = rfbClientSwap16IfLE(sx); |
| sy = rfbClientSwap16IfLE(sy); |
| sw = rfbClientSwap16IfLE(sw); |
| sh = rfbClientSwap16IfLE(sh); |
| se = rfbClientSwap32IfLE(se); |
| |
| if (se == rfbEncodingRaw) |
| { |
| CopyRectangle(client, (unsigned char *)ptr, sx, sy, sw, sh); |
| ptr += ((sw * sh) * (BPP / 8)); |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| #undef CARDBPP |