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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 <rdr/InStream.h>
#include <rdr/MemInStream.h>
#include <rdr/OutStream.h>
#include <rfb/ServerParams.h>
#include <rfb/PixelBuffer.h>
#include <rfb/HextileDecoder.h>
using namespace rfb;
#define BPP 8
#include <rfb/hextileDecode.h>
#undef BPP
#define BPP 16
#include <rfb/hextileDecode.h>
#undef BPP
#define BPP 32
#include <rfb/hextileDecode.h>
#undef BPP
HextileDecoder::HextileDecoder() : Decoder(DecoderPlain)
{
}
HextileDecoder::~HextileDecoder()
{
}
bool HextileDecoder::readRect(const Rect& r, rdr::InStream* is,
const ServerParams& server, rdr::OutStream* os)
{
Rect t;
size_t bytesPerPixel;
is->setRestorePoint();
bytesPerPixel = server.pf().bpp/8;
for (t.tl.y = r.tl.y; t.tl.y < r.br.y; t.tl.y += 16) {
t.br.y = __rfbmin(r.br.y, t.tl.y + 16);
for (t.tl.x = r.tl.x; t.tl.x < r.br.x; t.tl.x += 16) {
rdr::U8 tileType;
t.br.x = __rfbmin(r.br.x, t.tl.x + 16);
if (!is->hasDataOrRestore(1))
return false;
tileType = is->readU8();
os->writeU8(tileType);
if (tileType & hextileRaw) {
if (!is->hasDataOrRestore(t.area() * bytesPerPixel))
return false;
os->copyBytes(is, t.area() * bytesPerPixel);
continue;
}
if (tileType & hextileBgSpecified) {
if (!is->hasDataOrRestore(bytesPerPixel))
return false;
os->copyBytes(is, bytesPerPixel);
}
if (tileType & hextileFgSpecified) {
if (!is->hasDataOrRestore(bytesPerPixel))
return false;
os->copyBytes(is, bytesPerPixel);
}
if (tileType & hextileAnySubrects) {
rdr::U8 nSubrects;
if (!is->hasDataOrRestore(1))
return false;
nSubrects = is->readU8();
os->writeU8(nSubrects);
if (tileType & hextileSubrectsColoured) {
if (!is->hasDataOrRestore(nSubrects * (bytesPerPixel + 2)))
return false;
os->copyBytes(is, nSubrects * (bytesPerPixel + 2));
} else {
if (!is->hasDataOrRestore(nSubrects * 2))
return false;
os->copyBytes(is, nSubrects * 2);
}
}
}
}
is->clearRestorePoint();
return true;
}
void HextileDecoder::decodeRect(const Rect& r, const void* buffer,
size_t buflen, const ServerParams& server,
ModifiablePixelBuffer* pb)
{
rdr::MemInStream is(buffer, buflen);
const PixelFormat& pf = server.pf();
switch (pf.bpp) {
case 8: hextileDecode8 (r, &is, pf, pb); break;
case 16: hextileDecode16(r, &is, pf, pb); break;
case 32: hextileDecode32(r, &is, pf, pb); break;
}
}
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