1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/* 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.
*/
//
// TXImage.h
//
// A TXImage represents a rectangular off-screen image in any RFB pixel format.
// By default it will use the "native" pixel format for the screen, which will
// be an 8-bit colourmap unless the X display is TrueColor. The pixel format
// can be changed via the setPF() method. The pixel data is accessible via the
// data member inherited from FullFramePixelBuffer, or can be set via the
// fillRect(), imageRect(), copyRect() and maskRect() methods, also inherited
// from PixelBuffer. A rectangle of the image can be drawn into an X Window
// via the put() method. If using a colourmap, the setColourMapEntries() and
// updateColourMap() methods must be called to set up the colourmap as
// appropriate.
#ifndef __TXIMAGE_H__
#define __TXIMAGE_H__
#include <X11/Xlib.h>
#include <rfb/PixelBuffer.h>
#include <rfb/ColourMap.h>
#include <rfb/ColourCube.h>
#ifdef HAVE_MITSHM
#include <X11/extensions/XShm.h>
#endif
namespace rfb { class TransImageGetter; }
class TXImage : public rfb::FullFramePixelBuffer, public rfb::ColourMap {
public:
TXImage(Display* dpy, int width, int height, Visual* vis=0, int depth=0);
~TXImage();
// resize() resizes the image, preserving the image data where possible.
void resize(int w, int h);
// put causes the given rectangle to be drawn onto the given window.
void put(Window win, GC gc, const rfb::Rect& r);
// setColourMapEntries() changes some of the entries in the colourmap.
// However these settings won't take effect until updateColourMap() is
// called. This is because recalculating the internal translation table can
// be expensive.
void setColourMapEntries(int firstColour, int nColours, rdr::U16* rgbs);
void updateColourMap();
#ifdef HAVE_MITSHM
bool usingShm() { return shminfo; }
#else
bool usingShm() { return 0; }
#endif
// PixelBuffer methods
// width(), height(), getPF() etc are inherited from PixelBuffer
virtual void setPF(const rfb::PixelFormat& pf);
virtual int getStride() const;
private:
// ColourMap method
virtual void lookup(int index, int* r, int* g, int* b);
void createXImage();
void destroyXImage();
void getNativePixelFormat(Visual* vis, int depth);
XImage* xim;
Display* dpy;
Visual* vis;
int depth;
#ifdef HAVE_MITSHM
XShmSegmentInfo* shminfo;
#endif
rfb::TransImageGetter* tig;
rfb::Colour colourMap[256];
rfb::PixelFormat nativePF;
rfb::ColourCube* cube;
};
#endif
|
