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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright 2011 Pierre Ossman <ossman@cendio.se> for Cendio AB
* Copyright (C) 2011 D. R. Commander. 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 <stdlib.h>
#include <string.h>
#include <rfb/PixelFormat.h>
#include <rfb/Exception.h>
#include <rfb/PixelBuffer.h>
#include <rfb/PixelTransformer.h>
using namespace rfb;
static void noTransFn(void* table_,
const PixelFormat& inPF, const void* inPtr, int inStride,
const PixelFormat& outPF, void* outPtr, int outStride,
int width, int height)
{
rdr::U8* ip = (rdr::U8*)inPtr;
rdr::U8* op = (rdr::U8*)outPtr;
int inStrideBytes = inStride * (inPF.bpp/8);
int outStrideBytes = outStride * (outPF.bpp/8);
int widthBytes = width * (outPF.bpp/8);
while (height > 0) {
memcpy(op, ip, widthBytes);
ip += inStrideBytes;
op += outStrideBytes;
height--;
}
}
#define BPPOUT 8
#include "transInitTempl.h"
#define BPPIN 8
#include "transTempl.h"
#undef BPPIN
#define BPPIN 16
#include "transTempl.h"
#undef BPPIN
#define BPPIN 32
#include "transTempl.h"
#undef BPPIN
#undef BPPOUT
#define BPPOUT 16
#include "transInitTempl.h"
#define BPPIN 8
#include "transTempl.h"
#undef BPPIN
#define BPPIN 16
#include "transTempl.h"
#undef BPPIN
#define BPPIN 32
#include "transTempl.h"
#undef BPPIN
#undef BPPOUT
#define BPPOUT 32
#include "transInitTempl.h"
#define BPPIN 8
#include "transTempl.h"
#undef BPPIN
#define BPPIN 16
#include "transTempl.h"
#undef BPPIN
#define BPPIN 32
#include "transTempl.h"
#undef BPPIN
#undef BPPOUT
// Translation functions. Note that transSimple* is only used for 8/16bpp and
// transRGB* is used for 16/32bpp
static transFnType transSimpleFns[][3] = {
{ transSimple8to8, transSimple8to16, transSimple8to32 },
{ transSimple16to8, transSimple16to16, transSimple16to32 },
};
static transFnType transRGBFns[][3] = {
{ transRGB16to8, transRGB16to16, transRGB16to32 },
{ transRGB32to8, transRGB32to16, transRGB32to32 }
};
// Table initialisation functions.
typedef void (*initFnType)(rdr::U8** tablep, const PixelFormat& inPF,
const PixelFormat& outPF);
static initFnType initSimpleFns[] = {
initSimple8, initSimple16, initSimple32
};
static initFnType initRGBFns[] = {
initRGB8, initRGB16, initRGB32
};
PixelTransformer::PixelTransformer(bool econ)
: economic(econ), table(0), transFn(0)
{
}
PixelTransformer::~PixelTransformer()
{
delete [] table;
}
void PixelTransformer::init(const PixelFormat& inPF_,
const PixelFormat& outPF_)
{
inPF = inPF_;
outPF = outPF_;
if (table)
delete [] table;
table = NULL;
transFn = NULL;
if ((inPF.bpp != 8) && (inPF.bpp != 16) && (inPF.bpp != 32))
throw Exception("PixelTransformer: bpp in not 8, 16 or 32");
if ((outPF.bpp != 8) && (outPF.bpp != 16) && (outPF.bpp != 32))
throw Exception("PixelTransformer: bpp out not 8, 16 or 32");
if (inPF.equal(outPF)) {
transFn = noTransFn;
return;
}
if ((inPF.bpp > 16) || (economic && (inPF.bpp == 16))) {
transFn = transRGBFns[inPF.bpp/32][outPF.bpp/16];
(*initRGBFns[outPF.bpp/16]) (&table, inPF, outPF);
} else {
transFn = transSimpleFns[inPF.bpp/16][outPF.bpp/16];
(*initSimpleFns[outPF.bpp/16]) (&table, inPF, outPF);
}
}
const PixelFormat &PixelTransformer::getInPF() const
{
return inPF;
}
const PixelFormat &PixelTransformer::getOutPF() const
{
return outPF;
}
void PixelTransformer::translatePixels(const void* inPtr, void* outPtr,
int nPixels) const
{
if (!transFn)
throw Exception("PixelTransformer: not initialised yet");
(*transFn)(table, inPF, inPtr, nPixels,
outPF, outPtr, nPixels, nPixels, 1);
}
void PixelTransformer::translateRect(const void* inPtr, int inStride,
Rect inRect,
void* outPtr, int outStride,
Point outCoord) const
{
char *in, *out;
if (!transFn)
throw Exception("PixelTransformer: not initialised yet");
in = (char*)inPtr;
in += inPF.bpp/8 * inRect.tl.x;
in += (inStride * inPF.bpp/8) * inRect.tl.y;
out = (char*)outPtr;
out += outPF.bpp/8 * outCoord.x;
out += (outStride * outPF.bpp/8) * outCoord.y;
(*transFn)(table, inPF, in, inStride,
outPF, out, outStride,
inRect.width(), inRect.height());
}
bool PixelTransformer::willTransform(void)
{
return transFn != NULL && transFn != noTransFn;
}
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