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annotate src/core/android/SDL_android.cpp @ 5227:c66b2a778b7e

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Try to create an OpenGL ES 2.0 context on Android and successfully fall back to OpenGL ES 1.1 if that fails.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 07 Feb 2011 17:44:07 -0800
parents ed1d54f1290a
children b530ef003506
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23 #include "SDL_stdinc.h"
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24
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25 #include "SDL_android.h"
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26
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27 extern "C" {
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28 #include "../../events/SDL_events_c.h"
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29 #include "../../video/android/SDL_androidkeyboard.h"
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30 #include "../../video/android/SDL_androidtouch.h"
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31 #include "../../video/android/SDL_androidvideo.h"
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32
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33 /* Impelemented in audio/android/SDL_androidaudio.c */
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34 extern void Android_RunAudioThread();
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35 } // C
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36
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37 /*******************************************************************************
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38 This file links the Java side of Android with libsdl
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39 *******************************************************************************/
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40 #include <jni.h>
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41 #include <android/log.h>
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42
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43
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44 /*******************************************************************************
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45 Globals
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46 *******************************************************************************/
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47 static JNIEnv* mEnv = NULL;
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48 static JNIEnv* mAudioEnv = NULL;
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49
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50 // Main activity
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51 static jclass mActivityClass;
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52
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53 // method signatures
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54 static jmethodID midCreateGLContext;
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55 static jmethodID midFlipBuffers;
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56 static jmethodID midAudioInit;
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57 static jmethodID midAudioWriteShortBuffer;
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58 static jmethodID midAudioWriteByteBuffer;
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59 static jmethodID midAudioQuit;
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60
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61 // Accelerometer data storage
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62 static float fLastAccelerometer[3];
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63
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64
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65 /*******************************************************************************
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66 Functions called by JNI
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67 *******************************************************************************/
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68
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69 // Library init
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70 extern "C" jint JNI_OnLoad(JavaVM* vm, void* reserved)
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71 {
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72 return JNI_VERSION_1_4;
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73 }
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74
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75 // Called before SDL_main() to initialize JNI bindings
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76 extern "C" void SDL_Android_Init(JNIEnv* env, jclass cls)
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77 {
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78 __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL_Android_Init()");
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79
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80 mEnv = env;
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81 mActivityClass = cls;
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82
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83 midCreateGLContext = mEnv->GetStaticMethodID(mActivityClass,
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84 "createGLContext","(II)Z");
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85 midFlipBuffers = mEnv->GetStaticMethodID(mActivityClass,
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86 "flipBuffers","()V");
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87 midAudioInit = mEnv->GetStaticMethodID(mActivityClass,
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88 "audioInit", "(IZZI)Ljava/lang/Object;");
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89 midAudioWriteShortBuffer = mEnv->GetStaticMethodID(mActivityClass,
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90 "audioWriteShortBuffer", "([S)V");
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91 midAudioWriteByteBuffer = mEnv->GetStaticMethodID(mActivityClass,
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92 "audioWriteByteBuffer", "([B)V");
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93 midAudioQuit = mEnv->GetStaticMethodID(mActivityClass,
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94 "audioQuit", "()V");
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95
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96 if(!midCreateGLContext || !midFlipBuffers || !midAudioInit ||
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97 !midAudioWriteShortBuffer || !midAudioWriteByteBuffer || !midAudioQuit) {
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98 __android_log_print(ANDROID_LOG_WARN, "SDL", "SDL: Couldn't locate Java callbacks, check that they're named and typed correctly");
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99 }
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100 }
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101
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102 // Resize
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103 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeResize(
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104 JNIEnv* env, jclass jcls,
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105 jint width, jint height, jint format)
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106 {
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107 Android_SetScreenResolution(width, height, format);
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108 }
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109
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110 // Keydown
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111 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyDown(
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112 JNIEnv* env, jclass jcls, jint keycode)
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113 {
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114 Android_OnKeyDown(keycode);
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115 }
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116
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117 // Keyup
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118 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyUp(
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119 JNIEnv* env, jclass jcls, jint keycode)
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120 {
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121 Android_OnKeyUp(keycode);
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122 }
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123
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124 // Touch
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125 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeTouch(
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126 JNIEnv* env, jclass jcls,
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127 jint action, jfloat x, jfloat y, jfloat p)
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128 {
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129 Android_OnTouch(action, x, y, p);
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130 }
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131
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132 // Accelerometer
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133 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeAccel(
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134 JNIEnv* env, jclass jcls,
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135 jfloat x, jfloat y, jfloat z)
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136 {
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137 fLastAccelerometer[0] = x;
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138 fLastAccelerometer[1] = y;
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139 fLastAccelerometer[2] = z;
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140 }
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141
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142 // Quit
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143 extern "C" void Java_org_libsdl_app_SDLActivity_nativeQuit(
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144 JNIEnv* env, jclass cls)
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145 {
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146 // Inject a SDL_QUIT event
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147 SDL_SendQuit();
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148 }
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149
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150 extern "C" void Java_org_libsdl_app_SDLActivity_nativeRunAudioThread(
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151 JNIEnv* env, jclass cls)
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152 {
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153 /* This is the audio thread, with a different environment */
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154 mAudioEnv = env;
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155
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156 Android_RunAudioThread();
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157 }
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158
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159
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160 /*******************************************************************************
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161 Functions called by SDL into Java
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162 *******************************************************************************/
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163 extern "C" SDL_bool Android_JNI_CreateContext(int majorVersion, int minorVersion)
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164 {
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165 if (mEnv->CallStaticBooleanMethod(mActivityClass, midCreateGLContext, majorVersion, minorVersion)) {
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166 return SDL_TRUE;
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167 } else {
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168 return SDL_FALSE;
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169 }
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170 }
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171
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172 extern "C" void Android_JNI_SwapWindow()
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173 {
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174 mEnv->CallStaticVoidMethod(mActivityClass, midFlipBuffers);
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175 }
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176
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177 extern "C" void Android_JNI_SetActivityTitle(const char *title)
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178 {
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179 jmethodID mid;
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180
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181 mid = mEnv->GetStaticMethodID(mActivityClass,"setActivityTitle","(Ljava/lang/String;)V");
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182 if (mid) {
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183 mEnv->CallStaticVoidMethod(mActivityClass, mid, mEnv->NewStringUTF(title));
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184 }
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185 }
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186
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187 extern "C" void Android_JNI_GetAccelerometerValues(float values[3])
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188 {
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189 int i;
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190 for (i = 0; i < 3; ++i) {
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191 values[i] = fLastAccelerometer[i];
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192 }
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193 }
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194
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195 //
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196 // Audio support
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197 //
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198 static jboolean audioBuffer16Bit = JNI_FALSE;
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199 static jboolean audioBufferStereo = JNI_FALSE;
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200 static jobject audioBuffer = NULL;
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201 static void* audioBufferPinned = NULL;
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202
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203 extern "C" int Android_JNI_OpenAudioDevice(int sampleRate, int is16Bit, int channelCount, int desiredBufferFrames)
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204 {
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205 int audioBufferFrames;
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206
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207 __android_log_print(ANDROID_LOG_VERBOSE, "SDL", "SDL audio: opening device");
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208 audioBuffer16Bit = is16Bit;
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209 audioBufferStereo = channelCount > 1;
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210
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211 audioBuffer = mEnv->CallStaticObjectMethod(mActivityClass, midAudioInit, sampleRate, audioBuffer16Bit, audioBufferStereo, desiredBufferFrames);
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212
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213 if (audioBuffer == NULL) {
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214 __android_log_print(ANDROID_LOG_WARN, "SDL", "SDL audio: didn't get back a good audio buffer!");
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215 return 0;
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216 }
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217 audioBuffer = mEnv->NewGlobalRef(audioBuffer);
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218
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219 jboolean isCopy = JNI_FALSE;
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220 if (audioBuffer16Bit) {
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221 audioBufferPinned = mEnv->GetShortArrayElements((jshortArray)audioBuffer, &isCopy);
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222 audioBufferFrames = mEnv->GetArrayLength((jshortArray)audioBuffer);
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223 } else {
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224 audioBufferPinned = mEnv->GetByteArrayElements((jbyteArray)audioBuffer, &isCopy);
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225 audioBufferFrames = mEnv->GetArrayLength((jbyteArray)audioBuffer);
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226 }
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227 if (audioBufferStereo) {
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228 audioBufferFrames /= 2;
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229 }
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230
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231 return audioBufferFrames;
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232 }
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233
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234 extern "C" void * Android_JNI_GetAudioBuffer()
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235 {
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236 return audioBufferPinned;
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237 }
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238
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239 extern "C" void Android_JNI_WriteAudioBuffer()
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240 {
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241 if (audioBuffer16Bit) {
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242 mAudioEnv->ReleaseShortArrayElements((jshortArray)audioBuffer, (jshort *)audioBufferPinned, JNI_COMMIT);
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243 mAudioEnv->CallStaticVoidMethod(mActivityClass, midAudioWriteShortBuffer, (jshortArray)audioBuffer);
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244 } else {
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245 mAudioEnv->ReleaseByteArrayElements((jbyteArray)audioBuffer, (jbyte *)audioBufferPinned, JNI_COMMIT);
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246 mAudioEnv->CallStaticVoidMethod(mActivityClass, midAudioWriteByteBuffer, (jbyteArray)audioBuffer);
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247 }
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248
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249 /* JNI_COMMIT means the changes are committed to the VM but the buffer remains pinned */
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250 }
9f9bea41e88f Working audio implementation contributed by Joseph Lunderville
Sam Lantinga <slouken@libsdl.org>
parents: 4989
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251
9f9bea41e88f Working audio implementation contributed by Joseph Lunderville
Sam Lantinga <slouken@libsdl.org>
parents: 4989
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252 extern "C" void Android_JNI_CloseAudioDevice()
9f9bea41e88f Working audio implementation contributed by Joseph Lunderville
Sam Lantinga <slouken@libsdl.org>
parents: 4989
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253 {
4998
a514bfe6952a The window is changed to reflect the actual screen dimensions, for now.
Sam Lantinga <slouken@libsdl.org>
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254 mEnv->CallStaticVoidMethod(mActivityClass, midAudioQuit);
4964
6c645018741e Build the SDL library as a shared object on Android, so it will work correctly with SDL_image and SDL_ttf.
Sam Lantinga <slouken@libsdl.org>
parents:
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255
4997
a21501393bef Removed code from GetPrimtiveArrayCritical() experiment
Sam Lantinga <slouken@libsdl.org>
parents: 4996
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256 if (audioBuffer) {
a21501393bef Removed code from GetPrimtiveArrayCritical() experiment
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parents: 4996
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257 mEnv->DeleteGlobalRef(audioBuffer);
a21501393bef Removed code from GetPrimtiveArrayCritical() experiment
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258 audioBuffer = NULL;
a21501393bef Removed code from GetPrimtiveArrayCritical() experiment
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259 audioBufferPinned = NULL;
a21501393bef Removed code from GetPrimtiveArrayCritical() experiment
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parents: 4996
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260 }
4964
6c645018741e Build the SDL library as a shared object on Android, so it will work correctly with SDL_image and SDL_ttf.
Sam Lantinga <slouken@libsdl.org>
parents:
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261 }
4981
55b82067815b Fill in the video mode with the correct screen format
Sam Lantinga <slouken@libsdl.org>
parents: 4980
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262
55b82067815b Fill in the video mode with the correct screen format
Sam Lantinga <slouken@libsdl.org>
parents: 4980
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263 /* vi: set ts=4 sw=4 expandtab: */