/**
* Initialize an EGL context for the current display.
*/
int Engine::InitDisplay(android_app* app) {
if (!initialized_resources_) {
gl_context_->Init(app_->window);
LoadResources();
initialized_resources_ = true;
} else if(app->window != gl_context_->GetANativeWindow()) {
// Re-initialize ANativeWindow.
// On some devices, ANativeWindow is re-created when the app is resumed
assert(gl_context_->GetANativeWindow());
UnloadResources();
gl_context_->Invalidate();
app_ = app;
gl_context_->Init(app->window);
LoadResources();
initialized_resources_ = true;
} else {
// initialize OpenGL ES and EGL
if (EGL_SUCCESS == gl_context_->Resume(app_->window)) {
UnloadResources();
LoadResources();
} else {
assert(0);
}
}
ShowUI();
// Initialize GL state.
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
// Note that screen size might have been changed
glViewport(0, 0, gl_context_->GetScreenWidth(),
gl_context_->GetScreenHeight());
renderer_.UpdateViewport();
tap_camera_.SetFlip(1.f, -1.f, -1.f);
tap_camera_.SetPinchTransformFactor(2.f, 2.f, 8.f);
return 0;
}
void Engine::TrimMemory() {
LOGI("Trimming memory");
gl_context_->Invalidate();
}