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47ed8d321c
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@2 3789f03b-4d11-0410-bbf8-ca57d06f2519
105 lines
4.3 KiB
C++
105 lines
4.3 KiB
C++
/* Copyright (C) 2002-2003 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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//
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// TransImageGetter - class to perform translation between pixel formats,
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// implementing the ImageGetter interface.
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//
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#ifndef __RFB_TRANSIMAGEGETTER_H__
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#define __RFB_TRANSIMAGEGETTER_H__
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#include <rfb/Rect.h>
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#include <rfb/PixelFormat.h>
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#include <rfb/ImageGetter.h>
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namespace rfb {
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typedef void (*transFnType)(void* table_,
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const PixelFormat& inPF, void* inPtr,
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int inStride,
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const PixelFormat& outPF, void* outPtr,
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int outStride, int width, int height);
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class SMsgWriter;
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class ColourMap;
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class PixelBuffer;
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class ColourCube;
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class TransImageGetter : public ImageGetter {
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public:
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TransImageGetter(bool econ=false);
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virtual ~TransImageGetter();
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// init() is called to initialise the translation tables. The PixelBuffer
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// argument gives the source data and format details, outPF gives the
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// client's pixel format. If the client has a colour map, then the writer
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// argument is used to send a SetColourMapEntries message to the client.
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void init(PixelBuffer* pb, const PixelFormat& outPF, SMsgWriter* writer=0,
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ColourCube* cube=0);
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// setColourMapEntries() is called when the PixelBuffer has a colour map
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// which has changed. firstColour and nColours specify which part of the
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// colour map has changed. If nColours is 0, this means the rest of the
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// colour map. The PixelBuffer previously passed to init() must have a
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// valid ColourMap object. If the client also has a colour map, then the
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// writer argument is used to send a SetColourMapEntries message to the
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// client. If the client is true colour then instead we update the
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// internal translation table - in this case the caller should also make
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// sure that the client receives an update of the relevant parts of the
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// framebuffer (the simplest thing to do is just update the whole
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// framebuffer, though it is possible to be smarter than this).
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void setColourMapEntries(int firstColour, int nColours,
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SMsgWriter* writer=0);
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// getImage() gets the given rectangle of data from the PixelBuffer,
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// translates it into the client's pixel format and puts it in the buffer
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// pointed to by the outPtr argument. The optional outStride argument can
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// be used where padding is required between the output scanlines (the
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// padding will be outStride-r.width() pixels).
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void getImage(void* outPtr, const Rect& r, int outStride=0);
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// translatePixels() translates the given number of pixels from inPtr,
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// putting it into the buffer pointed to by outPtr. The pixels at inPtr
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// should be in the same format as the PixelBuffer, and the translated
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// pixels will be in the format previously given by the outPF argument to
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// init(). Note that this call does not use the PixelBuffer's pixel data.
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void translatePixels(void* inPtr, void* outPtr, int nPixels) const;
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// setPixelBuffer() changes the pixel buffer to be used. The new pixel
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// buffer MUST have the same pixel format as the old one - if not you
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// should call init() instead.
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void setPixelBuffer(PixelBuffer* pb_) { pb = pb_; }
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// setOffset() sets an offset which is subtracted from the coordinates of
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// the rectangle given to getImage().
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void setOffset(const Point& offset_) { offset = offset_; }
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private:
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bool economic;
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PixelBuffer* pb;
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PixelFormat outPF;
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rdr::U8* table;
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transFnType transFn;
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ColourCube* cube;
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Point offset;
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};
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}
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#endif
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