bool GLContext::Init(ANativeWindow* window) {
if (egl_context_initialized_) return true;
//
// Initialize EGL
//
window_ = window;
InitEGLSurface();
InitEGLContext();
InitGLES();
egl_context_initialized_ = true;
return true;
}
bool GLContext::Init(ANativeWindow *window, const int32_t msaa) {
if (egl_context_initialized_)
return true;
//
//Initialize EGL
//
window_ = window;
msaa_size_ = msaa;
InitEGLSurface();
InitEGLContext();
InitGLES();
egl_context_initialized_ = true;
return true;
}
EGLint GLContext::Resume( ANativeWindow* window )
{
if( egl_context_initialized_ == false )
{
Init( window );
return EGL_SUCCESS;
}
int32_t original_widhth = screen_width_;
int32_t original_height = screen_height_;
//Create surface
window_ = window;
surface_ = eglCreateWindowSurface( display_, config_, window_, NULL );
eglQuerySurface( display_, surface_, EGL_WIDTH, &screen_width_ );
eglQuerySurface( display_, surface_, EGL_HEIGHT, &screen_height_ );
if( screen_width_ != original_widhth || screen_height_ != original_height )
{
//Screen resized
LOGI( "Screen resized" );
}
if( eglMakeCurrent( display_, surface_, surface_, context_ ) == EGL_TRUE )
return EGL_SUCCESS;
EGLint err = eglGetError();
LOGW( "Unable to eglMakeCurrent %d", err );
if( err == EGL_CONTEXT_LOST )
{
//Recreate context
LOGI( "Re-creating egl context" );
InitEGLContext();
}
else
{
//Recreate surface
Terminate();
InitEGLSurface();
InitEGLContext();
}
return err;
}
EGLint GLContext::Swap() {
bool b = eglSwapBuffers(display_, surface_);
if (!b) {
EGLint err = eglGetError();
if (err == EGL_BAD_SURFACE) {
// Recreate surface
InitEGLSurface();
return EGL_SUCCESS; // Still consider glContext is valid
} else if (err == EGL_CONTEXT_LOST || err == EGL_BAD_CONTEXT) {
// Context has been lost!!
context_valid_ = false;
Terminate();
InitEGLContext();
}
return err;
}
return EGL_SUCCESS;
}
EGLint GLContext::Swap() {
bool b = eglSwapBuffers(display_, surface_);
if (!b) {
EGLint err = eglGetError();
if (err == EGL_BAD_SURFACE) {
//Recreate surface
InitEGLSurface();
err = EGL_SUCCESS; //Still consider glContext is valid
} else if (err == EGL_CONTEXT_LOST || err == EGL_BAD_CONTEXT) {
//Context has been lost!!
context_valid_ = false;
Terminate();
InitEGLContext();
}
return err;
}
if (restoreInterval_ && swapInterval_ != SWAPINTERVAL_DEFAULT) {
eglSwapInterval(display_, swapInterval_); //Restore Swap interval
}
return EGL_SUCCESS;
}
