src/events/SDL_windowevents.c
author Sam Lantinga <slouken@libsdl.org>
Wed, 16 Dec 2009 00:55:33 +0000
changeset 3573 41cd18e05965
parent 3502 98a819296cdc
child 3685 64ce267332c6
permissions -rw-r--r--
Fixed bug #666 Don't let the event queue overflow with resize events
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2009 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library 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 GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* Window event handling code for SDL */
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#include "SDL_events.h"
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#include "SDL_events_c.h"
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#include "SDL_mouse_c.h"
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#include "../video/SDL_sysvideo.h"
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static int
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RemovePendingSizeEvents(void * userdata, SDL_Event *event)
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{
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    SDL_Event *new_event = (SDL_Event *)userdata;
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    if (event->type == SDL_WINDOWEVENT &&
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        event->window.event == SDL_WINDOWEVENT_RESIZED &&
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        event->window.windowID == new_event->window.windowID) {
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        /* We're about to post a new size event, drop the old one */
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        return 0;
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    }
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    return 1;
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}
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int
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SDL_SendWindowEvent(SDL_WindowID windowID, Uint8 windowevent, int data1,
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                    int data2)
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{
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    int posted;
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    SDL_Window *window;
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    window = SDL_GetWindowFromID(windowID);
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    if (!window) {
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        return 0;
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    }
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    switch (windowevent) {
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    case SDL_WINDOWEVENT_SHOWN:
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        if (window->flags & SDL_WINDOW_SHOWN) {
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            return 0;
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        }
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        window->flags |= SDL_WINDOW_SHOWN;
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        SDL_OnWindowShown(window);
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        break;
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    case SDL_WINDOWEVENT_HIDDEN:
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        if (!(window->flags & SDL_WINDOW_SHOWN)) {
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            return 0;
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        }
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        window->flags &= ~SDL_WINDOW_SHOWN;
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        SDL_OnWindowHidden(window);
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        break;
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    case SDL_WINDOWEVENT_MOVED:
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        if (window->flags & SDL_WINDOW_FULLSCREEN) {
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            return 0;
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        }
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        if (data1 == SDL_WINDOWPOS_UNDEFINED) {
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            data1 = window->x;
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        }
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        if (data2 == SDL_WINDOWPOS_UNDEFINED) {
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            data2 = window->y;
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        }
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        if (data1 == window->x && data2 == window->y) {
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            return 0;
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        }
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        window->x = data1;
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        window->y = data2;
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        break;
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    case SDL_WINDOWEVENT_RESIZED:
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        if (window->flags & SDL_WINDOW_FULLSCREEN) {
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            return 0;
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        }
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        if (data1 == window->w && data2 == window->h) {
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            return 0;
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        }
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        window->w = data1;
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        window->h = data2;
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        SDL_OnWindowResized(window);
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        break;
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    case SDL_WINDOWEVENT_MINIMIZED:
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        if (window->flags & SDL_WINDOW_MINIMIZED) {
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            return 0;
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        }
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        window->flags |= SDL_WINDOW_MINIMIZED;
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        SDL_OnWindowMinimized(window);
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        break;
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    case SDL_WINDOWEVENT_MAXIMIZED:
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        if (window->flags & SDL_WINDOW_MAXIMIZED) {
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            return 0;
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        }
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        window->flags |= SDL_WINDOW_MAXIMIZED;
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        break;
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    case SDL_WINDOWEVENT_RESTORED:
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        if (!(window->flags & (SDL_WINDOW_MINIMIZED | SDL_WINDOW_MAXIMIZED))) {
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            return 0;
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        }
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        window->flags &= ~(SDL_WINDOW_MINIMIZED | SDL_WINDOW_MAXIMIZED);
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        SDL_OnWindowRestored(window);
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        break;
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    case SDL_WINDOWEVENT_ENTER:
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        if (window->flags & SDL_WINDOW_MOUSE_FOCUS) {
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            return 0;
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        }
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        window->flags |= SDL_WINDOW_MOUSE_FOCUS;
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   124
        break;
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   125
    case SDL_WINDOWEVENT_LEAVE:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   126
        if (!(window->flags & SDL_WINDOW_MOUSE_FOCUS)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   127
            return 0;
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   128
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   129
        window->flags &= ~SDL_WINDOW_MOUSE_FOCUS;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   130
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   131
    case SDL_WINDOWEVENT_FOCUS_GAINED:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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   132
        if (window->flags & SDL_WINDOW_INPUT_FOCUS) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   133
            return 0;
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parents:
diff changeset
   134
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   135
        window->flags |= SDL_WINDOW_INPUT_FOCUS;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   136
        SDL_OnWindowFocusGained(window);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   137
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   138
    case SDL_WINDOWEVENT_FOCUS_LOST:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   139
        if (!(window->flags & SDL_WINDOW_INPUT_FOCUS)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   140
            return 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   141
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   142
        window->flags &= ~SDL_WINDOW_INPUT_FOCUS;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   143
        SDL_OnWindowFocusLost(window);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   144
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   145
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   146
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   147
    /* Post the event, if desired */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   148
    posted = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   149
    if (SDL_ProcessEvents[SDL_WINDOWEVENT] == SDL_ENABLE) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   150
        SDL_Event event;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   151
        event.type = SDL_WINDOWEVENT;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   152
        event.window.event = windowevent;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   153
        event.window.data1 = data1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   154
        event.window.data2 = data2;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   155
        event.window.windowID = windowID;
3573
41cd18e05965 Fixed bug #666
Sam Lantinga <slouken@libsdl.org>
parents: 3502
diff changeset
   156
41cd18e05965 Fixed bug #666
Sam Lantinga <slouken@libsdl.org>
parents: 3502
diff changeset
   157
        /* Fixes queue overflow with resize events that aren't processed */
41cd18e05965 Fixed bug #666
Sam Lantinga <slouken@libsdl.org>
parents: 3502
diff changeset
   158
        if (windowevent == SDL_WINDOWEVENT_RESIZED) {
41cd18e05965 Fixed bug #666
Sam Lantinga <slouken@libsdl.org>
parents: 3502
diff changeset
   159
            SDL_FilterEvents(RemovePendingSizeEvents, &event);
41cd18e05965 Fixed bug #666
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diff changeset
   160
        }
41cd18e05965 Fixed bug #666
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   161
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   162
        posted = (SDL_PushEvent(&event) > 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
   163
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   164
    return (posted);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   165
}
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   166
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   167
/* vi: set ts=4 sw=4 expandtab: */