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annotate src/SDL_android.cpp @ 4984:889e6fef8fc5

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Support the new 16-bit pixel formats in SDL_CreateTextureFromSurface()
author Sam Lantinga <slouken@libsdl.org>
date Wed, 12 Jan 2011 15:22:29 -0800
parents 55b82067815b
children 58b6bb4a45e9
rev   line source
4964
6c645018741e Build the SDL library as a shared object on Android, so it will work correctly with SDL_image and SDL_ttf.
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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
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24 extern "C" {
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25 #include "events/SDL_events_c.h"
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26 #include "video/android/SDL_androidkeyboard.h"
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27 #include "video/android/SDL_androidvideo.h"
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28 }
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29
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30 /*******************************************************************************
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31 This file links the Java side of Android with libsdl
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32 *******************************************************************************/
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33 #include <jni.h>
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34 #include <android/log.h>
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35
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36
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37 /*******************************************************************************
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38 Globals
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39 *******************************************************************************/
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40 JavaVM* mVM = NULL;
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41 JNIEnv* mEnv = NULL;
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42 JNIEnv* mAudioThreadEnv = NULL; //See the note below for why this is necessary
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43
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44 //Main activity
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45 jclass mActivityInstance;
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46
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47 //method signatures
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48 jmethodID midCreateGLContext;
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49 jmethodID midFlipBuffers;
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50 jmethodID midEnableFeature;
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51 jmethodID midUpdateAudio;
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52
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53 //If we're not the active app, don't try to render
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54 bool bRenderingEnabled = false;
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55
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56 //Feature IDs
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57 static const int FEATURE_AUDIO = 1;
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58 static const int FEATURE_ACCEL = 2;
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59
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60 //Accelerometer data storage
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61 float fLastAccelerometer[3];
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62
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63
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64 /*******************************************************************************
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65 Functions called by JNI
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66 *******************************************************************************/
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67
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68 // Library init
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69 extern "C" jint JNI_OnLoad(JavaVM* vm, void* reserved)
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70 {
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71 mVM = vm;
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72
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73 return JNI_VERSION_1_4;
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74 }
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75
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76 // Called before SDL_main() to initialize JNI bindings
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77 extern "C" void SDL_Android_Init(JNIEnv* env)
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78 {
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79 mEnv = env;
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80
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81 __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL_Android_Init()");
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82
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83 jclass cls = mEnv->FindClass ("org/libsdl/app/SDLActivity");
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84 mActivityInstance = cls;
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85 midCreateGLContext = mEnv->GetStaticMethodID(cls,"createGLContext","()V");
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86 midFlipBuffers = mEnv->GetStaticMethodID(cls,"flipBuffers","()V");
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87 midEnableFeature = mEnv->GetStaticMethodID(cls,"enableFeature","(II)V");
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88 midUpdateAudio = mEnv->GetStaticMethodID(cls,"updateAudio","([B)V");
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89
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90 if(!midCreateGLContext || !midFlipBuffers || !midEnableFeature ||
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91 !midUpdateAudio) {
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92 __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: Bad mids\n");
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93 } else {
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94 #ifdef DEBUG
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95 __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: Good mids\n");
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96 #endif
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97 }
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98 }
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99
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100 // Keydown
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101 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyDown(JNIEnv* env,
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102 jobject obj, jint keycode)
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103 {
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104 #ifdef DEBUG
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105 __android_log_print(ANDROID_LOG_INFO, "SDL",
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106 "SDL: native key down %d\n", keycode);
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107 #endif
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108 Android_OnKeyDown(keycode);
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109 }
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110
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111 // Keyup
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112 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyUp(JNIEnv* env,
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113 jobject obj, jint keycode)
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114 {
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115 #ifdef DEBUG
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116 __android_log_print(ANDROID_LOG_INFO, "SDL",
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117 "SDL: native key up %d\n", keycode);
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118 #endif
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119 Android_OnKeyUp(keycode);
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120 }
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121
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122 // Touch
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123 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeTouch(JNIEnv* env,
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124 jobject obj, jint action, jfloat x, jfloat y, jfloat p)
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125 {
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126 #ifdef DEBUG
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127 __android_log_print(ANDROID_LOG_INFO, "SDL",
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128 "SDL: native touch event %d @ %f/%f, pressure %f\n",
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129 action, x, y, p);
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130 #endif
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131
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132 //TODO: Pass this off to the SDL multitouch stuff
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133 }
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134
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135 // Quit
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136 extern "C" void Java_org_libsdl_app_SDLActivity_nativeQuit( JNIEnv* env,
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137 jobject obj )
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138 {
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139 // Stop rendering as we're no longer in the foreground
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140 bRenderingEnabled = false;
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141
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142 // Inject a SDL_QUIT event
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143 SDL_SendQuit();
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144 }
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145
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146 // Resize
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147 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeResize(
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148 JNIEnv* env, jobject obj, jint width,
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149 jint height, jint format)
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150 {
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151 Android_SetScreenResolution(width, height, format);
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152 }
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153
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154 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeAccel(
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155 JNIEnv* env, jobject obj,
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156 jfloat x, jfloat y, jfloat z)
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157 {
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158 fLastAccelerometer[0] = x;
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159 fLastAccelerometer[1] = y;
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160 fLastAccelerometer[2] = z;
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161 }
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162
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163
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164
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165 /*******************************************************************************
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166 Functions called by SDL into Java
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167 *******************************************************************************/
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168 extern "C" void Android_CreateContext()
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169 {
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170 __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: sdl_create_context()\n");
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171
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172 bRenderingEnabled = true;
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173
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174 mEnv->CallStaticVoidMethod(mActivityInstance, midCreateGLContext );
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175 }
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176
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177 extern "C" void Android_Render()
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178 {
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179 if (!bRenderingEnabled) {
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180 return;
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181 }
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182
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183 // When we get here, we've accumulated a full frame
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184 mEnv->CallStaticVoidMethod(mActivityInstance, midFlipBuffers);
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185 }
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186
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187 extern "C" void Android_EnableFeature(int featureid, bool enabled)
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188 {
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189 mEnv->CallStaticVoidMethod(mActivityInstance, midEnableFeature,
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190 featureid, (int)enabled);
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191 }
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192
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193 extern "C" void Android_UpdateAudioBuffer(unsigned char *buf, int len)
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194 {
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195 //Annoyingly we can't just call into Java from any thread. Because the audio
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196 //callback is dispatched from the SDL audio thread (that wasn't made from
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197 //java, we have to do some magic here to let the JVM know about the thread.
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198 //Because everything it touches on the Java side is static anyway, it's
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199 //not a big deal, just annoying.
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200 if(!mAudioThreadEnv) {
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201 __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: Need to set up audio thread env\n");
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202
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203 mVM->AttachCurrentThread(&mAudioThreadEnv, NULL);
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204
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205 __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: ok\n");
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206 }
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207
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208 jbyteArray arr = mAudioThreadEnv->NewByteArray(len);
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209
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210 //blah. We probably should rework this so we avoid the copy.
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211 mAudioThreadEnv->SetByteArrayRegion(arr, 0, len, (jbyte *)buf);
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212
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213 __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: copied\n");
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214
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215 mAudioThreadEnv->CallStaticVoidMethod( mActivityInstance,
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216 midUpdateAudio, arr );
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217
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218 __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: invoked\n");
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219
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220 }
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221
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222 /* vi: set ts=4 sw=4 expandtab: */