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/* Copyright (C) 2002-2003 RealVNC Ltd. All Rights Reserved.
* Copyright (C) 2004-2005 Constantin Kaplinsky. 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.
*/
//
// Image.h
//
#ifndef __IMAGE_H__
#define __IMAGE_H__
#include <X11/Xlib.h>
#include <X11/Xutil.h>
//
// Image class is an Xlib-based implementation of screen image storage.
//
class Image {
public:
Image(Display *d);
Image(Display *d, int width, int height);
virtual ~Image();
bool isTrueColor() const { return trueColor; }
virtual const char *className() const {
return "Image";
}
virtual const char *classDesc() const {
return "basic Xlib image";
}
virtual void get(Window wnd, int x = 0, int y = 0);
virtual void get(Window wnd, int x, int y, int w, int h,
int dst_x = 0, int dst_y = 0);
// Copying pixels from one image to another.
virtual void updateRect(XImage *src, int dst_x = 0, int dst_y = 0);
virtual void updateRect(Image *src, int dst_x = 0, int dst_y = 0);
virtual void updateRect(XImage *src, int dst_x, int dst_y, int w, int h);
virtual void updateRect(Image *src, int dst_x, int dst_y, int w, int h);
virtual void updateRect(XImage *src, int dst_x, int dst_y,
int src_x, int src_y, int w, int h);
virtual void updateRect(Image *src, int dst_x, int dst_y,
int src_x, int src_y, int w, int h);
// Pointer to corresponding XImage, made public for efficiency.
// NOTE: if this field is NULL, then no methods other than Init()
// may be called.
XImage *xim;
// Get a pointer to the data corresponding to the given coordinates.
inline char *locatePixel(int x, int y) const {
return (xim->data +
y * xim->bytes_per_line +
x * (xim->bits_per_pixel / 8));
}
protected:
void Init(int width, int height);
// Like updateRect(), but does not check arguments.
void copyPixels(XImage *src,
int dst_x, int dst_y,
int src_x, int src_y,
int w, int h);
Display *dpy;
bool trueColor;
};
//
// ShmImage uses MIT-SHM extension of an X server to get image data.
//
#include <X11/extensions/XShm.h>
class ShmImage : public Image {
public:
ShmImage(Display *d);
ShmImage(Display *d, int width, int height);
virtual ~ShmImage();
virtual const char *className() const {
return "ShmImage";
}
virtual const char *classDesc() const {
return "shared memory image";
}
virtual void get(Window wnd, int x = 0, int y = 0);
virtual void get(Window wnd, int x, int y, int w, int h,
int dst_x = 0, int dst_y = 0);
protected:
void Init(int width, int height, const XVisualInfo *vinfo = NULL);
XShmSegmentInfo *shminfo;
};
//
// ImageFactory class is used to produce instances of Image-derived
// objects that are most appropriate for current X server and user
// settings.
//
class ImageFactory {
public:
ImageFactory(bool allowShm);
virtual ~ImageFactory();
bool isShmAllowed() { return mayUseShm; }
virtual Image *newImage(Display *d, int width, int height);
protected:
bool mayUseShm;
};
#endif // __IMAGE_H__
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