This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_android.cpp
222 lines (175 loc) · 7 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2010 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
24
25
26
extern "C" {
#include "events/SDL_events_c.h"
#include "video/android/SDL_androidkeyboard.h"
27
#include "video/android/SDL_androidvideo.h"
28
29
}
30
31
32
33
34
35
36
37
38
39
/*******************************************************************************
This file links the Java side of Android with libsdl
*******************************************************************************/
#include <jni.h>
#include <android/log.h>
/*******************************************************************************
Globals
*******************************************************************************/
40
JavaVM* mVM = NULL;
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
JNIEnv* mEnv = NULL;
JNIEnv* mAudioThreadEnv = NULL; //See the note below for why this is necessary
//Main activity
jclass mActivityInstance;
//method signatures
jmethodID midCreateGLContext;
jmethodID midFlipBuffers;
jmethodID midEnableFeature;
jmethodID midUpdateAudio;
//If we're not the active app, don't try to render
bool bRenderingEnabled = false;
//Feature IDs
static const int FEATURE_AUDIO = 1;
static const int FEATURE_ACCEL = 2;
//Accelerometer data storage
float fLastAccelerometer[3];
/*******************************************************************************
Functions called by JNI
66
*******************************************************************************/
67
68
69
70
71
// Library init
extern "C" jint JNI_OnLoad(JavaVM* vm, void* reserved)
{
mVM = vm;
72
73
74
return JNI_VERSION_1_4;
}
75
76
77
78
// Called before SDL_main() to initialize JNI bindings
extern "C" void SDL_Android_Init(JNIEnv* env)
{
79
80
mEnv = env;
81
__android_log_print(ANDROID_LOG_INFO, "SDL", "SDL_Android_Init()");
82
83
84
85
86
87
88
89
90
jclass cls = mEnv->FindClass ("org/libsdl/app/SDLActivity");
mActivityInstance = cls;
midCreateGLContext = mEnv->GetStaticMethodID(cls,"createGLContext","()V");
midFlipBuffers = mEnv->GetStaticMethodID(cls,"flipBuffers","()V");
midEnableFeature = mEnv->GetStaticMethodID(cls,"enableFeature","(II)V");
midUpdateAudio = mEnv->GetStaticMethodID(cls,"updateAudio","([B)V");
if(!midCreateGLContext || !midFlipBuffers || !midEnableFeature ||
91
!midUpdateAudio) {
92
__android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: Bad mids\n");
93
} else {
94
95
96
97
98
99
#ifdef DEBUG
__android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: Good mids\n");
#endif
}
}
100
// Keydown
101
extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyDown(JNIEnv* env,
102
103
jobject obj, jint keycode)
{
104
105
#ifdef DEBUG
__android_log_print(ANDROID_LOG_INFO, "SDL",
106
"SDL: native key down %d\n", keycode);
107
#endif
108
Android_OnKeyDown(keycode);
109
110
}
111
// Keyup
112
extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyUp(JNIEnv* env,
113
114
jobject obj, jint keycode)
{
115
116
#ifdef DEBUG
__android_log_print(ANDROID_LOG_INFO, "SDL",
117
"SDL: native key up %d\n", keycode);
118
#endif
119
Android_OnKeyUp(keycode);
120
121
}
122
// Touch
123
extern "C" void Java_org_libsdl_app_SDLActivity_onNativeTouch(JNIEnv* env,
124
125
jobject obj, jint action, jfloat x, jfloat y, jfloat p)
{
126
127
128
129
130
131
132
133
134
#ifdef DEBUG
__android_log_print(ANDROID_LOG_INFO, "SDL",
"SDL: native touch event %d @ %f/%f, pressure %f\n",
action, x, y, p);
#endif
//TODO: Pass this off to the SDL multitouch stuff
}
135
// Quit
136
extern "C" void Java_org_libsdl_app_SDLActivity_nativeQuit( JNIEnv* env,
137
138
139
140
jobject obj )
{
// Stop rendering as we're no longer in the foreground
bRenderingEnabled = false;
141
142
143
// Inject a SDL_QUIT event
SDL_SendQuit();
144
145
}
146
// Resize
147
148
extern "C" void Java_org_libsdl_app_SDLActivity_onNativeResize(
JNIEnv* env, jobject obj, jint width,
149
150
jint height, jint format)
{
151
Android_SetScreenResolution(width, height, format);
152
153
154
155
}
extern "C" void Java_org_libsdl_app_SDLActivity_onNativeAccel(
JNIEnv* env, jobject obj,
156
157
jfloat x, jfloat y, jfloat z)
{
158
159
160
161
162
163
164
165
166
167
fLastAccelerometer[0] = x;
fLastAccelerometer[1] = y;
fLastAccelerometer[2] = z;
}
/*******************************************************************************
Functions called by SDL into Java
*******************************************************************************/
168
169
170
extern "C" void Android_CreateContext()
{
__android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: sdl_create_context()\n");
171
172
bRenderingEnabled = true;
173
174
175
176
mEnv->CallStaticVoidMethod(mActivityInstance, midCreateGLContext );
}
177
178
179
extern "C" void Android_Render()
{
if (!bRenderingEnabled) {
180
181
182
return;
}
183
184
// When we get here, we've accumulated a full frame
mEnv->CallStaticVoidMethod(mActivityInstance, midFlipBuffers);
185
186
}
187
188
extern "C" void Android_EnableFeature(int featureid, bool enabled)
{
189
190
191
192
mEnv->CallStaticVoidMethod(mActivityInstance, midEnableFeature,
featureid, (int)enabled);
}
193
194
extern "C" void Android_UpdateAudioBuffer(unsigned char *buf, int len)
{
195
196
197
198
199
//Annoyingly we can't just call into Java from any thread. Because the audio
//callback is dispatched from the SDL audio thread (that wasn't made from
//java, we have to do some magic here to let the JVM know about the thread.
//Because everything it touches on the Java side is static anyway, it's
//not a big deal, just annoying.
200
if(!mAudioThreadEnv) {
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
__android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: Need to set up audio thread env\n");
mVM->AttachCurrentThread(&mAudioThreadEnv, NULL);
__android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: ok\n");
}
jbyteArray arr = mAudioThreadEnv->NewByteArray(len);
//blah. We probably should rework this so we avoid the copy.
mAudioThreadEnv->SetByteArrayRegion(arr, 0, len, (jbyte *)buf);
__android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: copied\n");
mAudioThreadEnv->CallStaticVoidMethod( mActivityInstance,
midUpdateAudio, arr );
__android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: invoked\n");
}
221
222
/* vi: set ts=4 sw=4 expandtab: */