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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.
*/
#ifndef __RFB_PIXELTRANSFORMER_H__
#define __RFB_PIXELTRANSFORMER_H__
#include <stdlib.h>
#include <rfb/Rect.h>
#include <rfb/PixelFormat.h>
namespace rfb {
typedef void (*transFnType)(void* table_,
const PixelFormat& inPF, void* inPtr,
int inStride,
const PixelFormat& outPF, void* outPtr,
int outStride, int width, int height);
class SMsgWriter;
class ColourMap;
class PixelBuffer;
class ColourCube;
typedef void (*setCMFnType)(int firstColour, int nColours, ColourMap* cm, void* data);
class PixelTransformer {
public:
PixelTransformer(bool econ=false);
virtual ~PixelTransformer();
// init() is called to initialise the translation tables. The inPF and
// inCM arguments give the source format details, outPF gives the
// target pixel format. If the target has a colour map, then the you
// must specify either a colour map callback or a colour cube to indicate
// how the target colour map should be handled. If both are specified
// then the cube will be used.
void init(const PixelFormat& inPF, ColourMap* inCM,
const PixelFormat& outPF, ColourCube* cube = NULL,
setCMFnType cmCallback = NULL, void *cbData = NULL);
const PixelFormat &getInPF() const;
const ColourMap *getInColourMap() const;
const PixelFormat &getOutPF() const;
const ColourCube *getOutColourCube() const;
// setColourMapEntries() is called when the colour map specified to init()
// has changed. firstColour and nColours specify which part of the
// colour map has changed. If nColours is 0, this means the rest of the
// colour map. If the target also has a colour map, then the callback or
// cube specified to init() will be used. If the target is true colour
// then instead we update the internal translation table - in this case
// the caller should also make sure that the target surface receives an
// update of the relevant parts (the simplest thing to do is just update
// the whole framebuffer, though it is possible to be smarter than this).
void setColourMapEntries(int firstColour, int nColours);
// translatePixels() translates the given number of pixels from inPtr,
// putting it into the buffer pointed to by outPtr. The pixels at inPtr
// should be in the format given by inPF to init(), and the translated
// pixels will be in the format given by the outPF argument to init().
void translatePixels(void* inPtr, void* outPtr, int nPixels) const;
// Similar to translatePixels() but handles an arbitrary region of
// two pixel buffers.
void translateRect(void* inPtr, int inStride, Rect inRect,
void* outPtr, int outStride, Point outCoord) const;
bool willTransform(void);
private:
bool economic;
PixelFormat inPF;
ColourMap* inCM;
PixelFormat outPF;
setCMFnType cmCallback;
void *cbData;
ColourCube* cube;
rdr::U8* table;
transFnType transFn;
};
}
#endif
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