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/* Copyright (C) 2002-2005 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.
*/
#include <stdio.h>
#include <rdr/InStream.h>
#include <rfb/Exception.h>
#include <rfb/util.h>
#include <rfb/CMsgHandler.h>
#include <rfb/CMsgReader.h>
using namespace rfb;
CMsgReader::CMsgReader(CMsgHandler* handler_, rdr::InStream* is_)
: imageBufIdealSize(0), handler(handler_), is(is_),
imageBuf(0), imageBufSize(0)
{
for (int i = 0; i <= encodingMax; i++) {
decoders[i] = 0;
}
}
CMsgReader::~CMsgReader()
{
for (int i = 0; i <= encodingMax; i++) {
delete decoders[i];
}
delete [] imageBuf;
}
void CMsgReader::readSetColourMapEntries()
{
is->skip(1);
int firstColour = is->readU16();
int nColours = is->readU16();
rdr::U16Array rgbs(nColours * 3);
for (int i = 0; i < nColours * 3; i++)
rgbs.buf[i] = is->readU16();
handler->setColourMapEntries(firstColour, nColours, rgbs.buf);
}
void CMsgReader::readBell()
{
handler->bell();
}
void CMsgReader::readServerCutText()
{
is->skip(3);
rdr::U32 len = is->readU32();
if (len > 256*1024) {
is->skip(len);
fprintf(stderr,"cut text too long (%d bytes) - ignoring\n",len);
return;
}
CharArray ca(len+1);
ca.buf[len] = 0;
is->readBytes(ca.buf, len);
handler->serverCutText(ca.buf, len);
}
void CMsgReader::readFramebufferUpdateStart()
{
handler->framebufferUpdateStart();
}
void CMsgReader::readFramebufferUpdateEnd()
{
handler->framebufferUpdateEnd();
}
void CMsgReader::readRect(const Rect& r, int encoding)
{
if ((r.br.x > handler->cp.width) || (r.br.y > handler->cp.height)) {
fprintf(stderr, "Rect too big: %dx%d at %d,%d exceeds %dx%d\n",
r.width(), r.height(), r.tl.x, r.tl.y,
handler->cp.width, handler->cp.height);
throw Exception("Rect too big");
}
if (r.is_empty())
fprintf(stderr, "Warning: zero size rect\n");
handler->beginRect(r, encoding);
if (encoding == encodingCopyRect) {
readCopyRect(r);
} else {
if (encoding > encodingMax) {
fprintf(stderr, "Unknown rect encoding %d\n", encoding);
throw Exception("Unknown rect encoding");
}
if (!decoders[encoding]) {
decoders[encoding] = Decoder::createDecoder(encoding, this);
if (!decoders[encoding]) {
fprintf(stderr, "Unknown rect encoding %d\n", encoding);
throw Exception("Unknown rect encoding");
}
}
decoders[encoding]->readRect(r, handler);
}
handler->endRect(r, encoding);
}
void CMsgReader::readCopyRect(const Rect& r)
{
int srcX = is->readU16();
int srcY = is->readU16();
handler->copyRect(r, srcX, srcY);
}
void CMsgReader::readSetCursor(int width, int height, const Point& hotspot)
{
int data_len = width * height * (handler->cp.pf().bpp/8);
int mask_len = ((width+7)/8) * height;
rdr::U8Array data(data_len);
rdr::U8Array mask(mask_len);
is->readBytes(data.buf, data_len);
is->readBytes(mask.buf, mask_len);
handler->setCursor(width, height, hotspot, data.buf, mask.buf);
}
rdr::U8* CMsgReader::getImageBuf(int required, int requested, int* nPixels)
{
int requiredBytes = required * (handler->cp.pf().bpp / 8);
int requestedBytes = requested * (handler->cp.pf().bpp / 8);
int size = requestedBytes;
if (size > imageBufIdealSize) size = imageBufIdealSize;
if (size < requiredBytes)
size = requiredBytes;
if (imageBufSize < size) {
imageBufSize = size;
delete [] imageBuf;
imageBuf = new rdr::U8[imageBufSize];
}
if (nPixels)
*nPixels = imageBufSize / (handler->cp.pf().bpp / 8);
return imageBuf;
}
int CMsgReader::bpp()
{
return handler->cp.pf().bpp;
}
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