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https://github.com/TigerVNC/tigervnc.git
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47ed8d321c
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@2 3789f03b-4d11-0410-bbf8-ca57d06f2519
90 lines
3.0 KiB
C++
90 lines
3.0 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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// TXImage.h
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//
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// A TXImage represents a rectangular off-screen image in any RFB pixel format.
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// By default it will use the "native" pixel format for the screen, which will
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// be an 8-bit colourmap unless the X display is TrueColor. The pixel format
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// can be changed via the setPF() method. The pixel data is accessible via the
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// data member inherited from FullFramePixelBuffer, or can be set via the
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// fillRect(), imageRect(), copyRect() and maskRect() methods, also inherited
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// from PixelBuffer. A rectangle of the image can be drawn into an X Window
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// via the put() method. If using a colourmap, the setColourMapEntries() and
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// updateColourMap() methods must be called to set up the colourmap as
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// appropriate.
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#ifndef __TXIMAGE_H__
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#define __TXIMAGE_H__
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#include <X11/Xlib.h>
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#include <rfb/PixelBuffer.h>
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#include <rfb/ColourMap.h>
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#include <rfb/ColourCube.h>
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#include <X11/extensions/XShm.h>
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namespace rfb { class TransImageGetter; }
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class TXImage : public rfb::FullFramePixelBuffer, public rfb::ColourMap {
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public:
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TXImage(Display* dpy, int width, int height, Visual* vis=0, int depth=0);
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~TXImage();
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// resize() resizes the image, preserving the image data where possible.
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void resize(int w, int h);
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// put causes the given rectangle to be drawn onto the given window.
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void put(Window win, GC gc, const rfb::Rect& r);
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// setColourMapEntries() changes some of the entries in the colourmap.
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// However these settings won't take effect until updateColourMap() is
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// called. This is because recalculating the internal translation table can
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// be expensive.
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void setColourMapEntries(int firstColour, int nColours, rdr::U16* rgbs);
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void updateColourMap();
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bool usingShm() { return shminfo; }
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// PixelBuffer methods
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// width(), height(), getPF() etc are inherited from PixelBuffer
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virtual void setPF(const rfb::PixelFormat& pf);
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virtual int getStride() const;
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private:
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// ColourMap method
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virtual void lookup(int index, int* r, int* g, int* b);
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void createXImage();
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void destroyXImage();
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void getNativePixelFormat(Visual* vis, int depth);
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XImage* xim;
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Display* dpy;
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Visual* vis;
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int depth;
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XShmSegmentInfo* shminfo;
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rfb::TransImageGetter* tig;
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rfb::Colour colourMap[256];
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rfb::PixelFormat nativePF;
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rfb::ColourCube* cube;
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};
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#endif
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