1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2006 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 /* Resize event handling code for SDL */
25
26 #include "SDL_events.h"
27 #include "SDL_events_c.h"
28 #include "../video/SDL_sysvideo.h"
29
30
31 /* Keep the last resize event so we don't post duplicates */
32 static struct {
33 int w;
34 int h;
35 } last_resize;
36
37 /* This is global for SDL_eventloop.c */
SDL_PrivateResize(int w,int h)38 int SDL_PrivateResize(int w, int h)
39 {
40 int posted;
41 SDL_Event events[32];
42
43 /* See if this event would change the video surface */
44 if ( !w || !h
45 #ifndef __OS2__
46 || ((last_resize.w == w) && (last_resize.h == h))
47 #endif
48 ) {
49 return(0);
50 }
51 last_resize.w = w;
52 last_resize.h = h;
53 if ( ! SDL_VideoSurface ||
54 ((w == SDL_VideoSurface->w) && (h == SDL_VideoSurface->h)) ) {
55 return(0);
56 }
57
58 /* Pull out all old resize events */
59 SDL_PeepEvents(events, sizeof(events)/sizeof(events[0]),
60 SDL_GETEVENT, SDL_VIDEORESIZEMASK);
61
62 /* Post the event, if desired */
63 posted = 0;
64 if ( SDL_ProcessEvents[SDL_VIDEORESIZE] == SDL_ENABLE ) {
65 SDL_Event event;
66 event.type = SDL_VIDEORESIZE;
67 event.resize.w = w;
68 event.resize.h = h;
69 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
70 posted = 1;
71 SDL_PushEvent(&event);
72 }
73 }
74 return(posted);
75 }
76