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Tina5/tina-tools/tinatool/gphx/x11/gphxX11_mask.c

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  1 /**********
  2  * 
  3  * Copyright (c) 2003, Division of Imaging Science and Biomedical Engineering,
  4  * University of Manchester, UK.  All rights reserved.
  5  * 
  6  * Redistribution and use in source and binary forms, with or without modification, 
  7  * are permitted provided that the following conditions are met:
  8  * 
  9  *   . Redistributions of source code must retain the above copyright notice, 
 10  *     this list of conditions and the following disclaimer.
 11  *    
 12  *   . Redistributions in binary form must reproduce the above copyright notice,
 13  *     this list of conditions and the following disclaimer in the documentation 
 14  *     and/or other materials provided with the distribution.
 15  * 
 16  *   . Neither the name of the University of Manchester nor the names of its
 17  *     contributors may be used to endorse or promote products derived from this 
 18  *     software without specific prior written permission.
 19  * 
 20  * 
 21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 31  * POSSIBILITY OF SUCH DAMAGE.
 32  *
 33  **********
 34  * 
 35  * Program :    TINA
 36  * File    :  $Source: /home/tina/cvs/tina-tools/tinatool/gphx/x11/gphxX11_mask.c,v $
 37  * Date    :  $Date: 2003/10/01 16:02:47 $
 38  * Version :  $Revision: 1.2 $
 39  * CVS Id  :  $Id: gphxX11_mask.c,v 1.2 2003/10/01 16:02:47 tony Exp $
 40  *
 41  * Author  :  Legacy TINA
 42  *
 43  * Notes   :
 44  * 
 45  * tv_screen_mask.c:
 46  * allows drawing to take place through a clip mask
 47  *
 48  *********
 49 */
 50 
 51 #include "gphxX11_mask.h"
 52 
 53 #if HAVE_CONFIG_H
 54   #include <config.h>
 55 #endif
 56 
 57 
 58 void   *tv_screen_mask_get(Tv_screen * screen, int lx, int ly, int ux, int uy)
 59 {
 60     Tv_mask *mask = ts_ralloc(Tv_mask);
 61 
 62     mask->lx = lx;
 63     mask->ly = ly;
 64     mask->ux = ux;
 65     mask->uy = uy;
 66     mask->bitmap = XCreatePixmap(screen->display, screen->window,
 67                                  ux - lx, uy - ly, 1);
 68     mask->gc = XCreateGC(screen->display, mask->bitmap, 0, 0);
 69     XSetBackground(screen->display, mask->gc, (unsigned long) 0);
 70     XSetForeground(screen->display, mask->gc, (unsigned long) 0);
 71     XFillRectangle(screen->display, mask->bitmap, mask->gc, 0, 0, ux - lx, uy - ly);
 72     return ((void *) mask);
 73 }
 74 
 75 void    tv_screen_mask_use(Tv_screen * screen, Tv_mask * mask)
 76 {
 77     if (mask == NULL)
 78         XSetClipMask(screen->display, screen->gc, None);
 79     else
 80     {
 81         XSetClipMask(screen->display, screen->gc, mask->bitmap);
 82         XSetClipOrigin(screen->display, screen->gc, mask->lx, mask->ly);
 83     }
 84 }
 85 
 86 void    tv_screen_mask_point(Tv_screen * screen, Tv_mask * mask, Ipos pos, int bit)
 87 {
 88     int     x = ipos_x(pos) - mask->lx;
 89     int     y = ipos_y(pos) - mask->ly;
 90 
 91     XSetForeground(screen->display, mask->gc, (unsigned long) bit);
 92     XDrawPoint(screen->display, mask->bitmap, mask->gc, x, y);
 93 }
 94 
 95 void    tv_screen_mask_free(Tv_screen * screen, Tv_mask * mask)
 96 {
 97     XSetClipMask(screen->display, screen->gc, None);
 98     XFreeGC(screen->display, mask->gc);
 99     XFreePixmap(screen->display, mask->bitmap);
100     rfree((void *) mask);
101 }
102 

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