SDL_androidevents.c
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
/*
Simple DirectMedia Layer
Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_ANDROID
/* We're going to do this by default */
#define SDL_ANDROID_BLOCK_ON_PAUSE 1
#include "SDL_androidevents.h"
#include "SDL_events.h"
#include "SDL_androidwindow.h"
void android_egl_context_backup();
void android_egl_context_restore();
35
36
#if SDL_AUDIO_DRIVER_ANDROID
37
38
void AndroidAUD_ResumeDevices(void);
void AndroidAUD_PauseDevices(void);
39
40
41
42
#else
static void AndroidAUD_ResumeDevices(void) {}
static void AndroidAUD_PauseDevices(void) {}
#endif
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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
void
android_egl_context_restore()
{
SDL_Event event;
SDL_WindowData *data = (SDL_WindowData *) Android_Window->driverdata;
if (SDL_GL_MakeCurrent(Android_Window, (SDL_GLContext) data->egl_context) < 0) {
/* The context is no longer valid, create a new one */
data->egl_context = (EGLContext) SDL_GL_CreateContext(Android_Window);
SDL_GL_MakeCurrent(Android_Window, (SDL_GLContext) data->egl_context);
event.type = SDL_RENDER_DEVICE_RESET;
SDL_PushEvent(&event);
}
}
void
android_egl_context_backup()
{
/* Keep a copy of the EGL Context so we can try to restore it when we resume */
SDL_WindowData *data = (SDL_WindowData *) Android_Window->driverdata;
data->egl_context = SDL_GL_GetCurrentContext();
/* We need to do this so the EGLSurface can be freed */
SDL_GL_MakeCurrent(Android_Window, NULL);
}
void
Android_PumpEvents(_THIS)
{
static int isPaused = 0;
#if SDL_ANDROID_BLOCK_ON_PAUSE
static int isPausing = 0;
#endif
/* No polling necessary */
/*
* Android_ResumeSem and Android_PauseSem are signaled from Java_org_libsdl_app_SDLActivity_nativePause and Java_org_libsdl_app_SDLActivity_nativeResume
* When the pause semaphore is signaled, if SDL_ANDROID_BLOCK_ON_PAUSE is defined the event loop will block until the resume signal is emitted.
*/
#if SDL_ANDROID_BLOCK_ON_PAUSE
if (isPaused && !isPausing) {
/* Make sure this is the last thing we do before pausing */
android_egl_context_backup();
AndroidAUD_PauseDevices();
if(SDL_SemWait(Android_ResumeSem) == 0) {
#else
if (isPaused) {
if(SDL_SemTryWait(Android_ResumeSem) == 0) {
#endif
isPaused = 0;
AndroidAUD_ResumeDevices();
/* Restore the GL Context from here, as this operation is thread dependent */
if (!SDL_HasEvent(SDL_QUIT)) {
android_egl_context_restore();
}
}
}
else {
#if SDL_ANDROID_BLOCK_ON_PAUSE
if( isPausing || SDL_SemTryWait(Android_PauseSem) == 0 ) {
/* We've been signaled to pause, but before we block ourselves,
we need to make sure that certain key events have reached the app */
if (SDL_HasEvent(SDL_WINDOWEVENT) || SDL_HasEvent(SDL_APP_WILLENTERBACKGROUND) || SDL_HasEvent(SDL_APP_DIDENTERBACKGROUND) ) {
isPausing = 1;
}
else {
isPausing = 0;
isPaused = 1;
}
}
#else
if(SDL_SemTryWait(Android_PauseSem) == 0) {
android_egl_context_backup();
AndroidAUD_PauseDevices();
isPaused = 1;
}
#endif
}
}
#endif /* SDL_VIDEO_DRIVER_ANDROID */
/* vi: set ts=4 sw=4 expandtab: */