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#include "map_renderer.hpp"
#include <mbgl/renderer/renderer.hpp>
#include <mbgl/gfx/backend_scope.hpp>
#include <mbgl/util/run_loop.hpp>
#include <string>
#include "attach_env.hpp"
#include "android_renderer_backend.hpp"
#include "map_renderer_runnable.hpp"
namespace mbgl {
namespace android {
MapRenderer::MapRenderer(jni::JNIEnv& _env,
const jni::Object<MapRenderer>& obj,
jni::jfloat pixelRatio_,
const jni::String& localIdeographFontFamily_)
: javaPeer(_env, obj)
, pixelRatio(pixelRatio_)
, localIdeographFontFamily(localIdeographFontFamily_ ? jni::Make<std::string>(_env, localIdeographFontFamily_) : optional<std::string>{})
, mailbox(std::make_shared<Mailbox>(*this)) {
}
MapRenderer::~MapRenderer() = default;
void MapRenderer::reset() {
destroyed = true;
if (renderer) {
// Make sure to destroy the renderer on the GL Thread
auto self = ActorRef<MapRenderer>(*this, mailbox);
self.ask(&MapRenderer::resetRenderer).wait();
}
// Lock to make sure there is no concurrent initialisation on the gl thread
std::lock_guard<std::mutex> lock(initialisationMutex);
rendererObserver.reset();
}
ActorRef<Renderer> MapRenderer::actor() const {
return *rendererRef;
}
void MapRenderer::schedule(std::function<void()> scheduled) {
// Create a runnable
android::UniqueEnv _env = android::AttachEnv();
auto runnable = std::make_unique<MapRendererRunnable>(*_env, std::move(scheduled));
// Obtain ownership of the peer (gets transferred to the MapRenderer on the JVM for later GC)
auto peer = runnable->peer();
// Queue the event on the Java Peer
static auto& javaClass = jni::Class<MapRenderer>::Singleton(*_env);
static auto queueEvent = javaClass.GetMethod<void(
jni::Object<MapRendererRunnable>)>(*_env, "queueEvent");
auto weakReference = javaPeer.get(*_env);
if (weakReference) {
weakReference.Call(*_env, queueEvent, peer);
}
// Release the c++ peer as it will be destroyed on GC of the Java Peer
runnable.release();
}
void MapRenderer::requestRender() {
android::UniqueEnv _env = android::AttachEnv();
static auto& javaClass = jni::Class<MapRenderer>::Singleton(*_env);
static auto onInvalidate = javaClass.GetMethod<void()>(*_env, "requestRender");
auto weakReference = javaPeer.get(*_env);
if (weakReference) {
weakReference.Call(*_env, onInvalidate);
}
}
void MapRenderer::update(std::shared_ptr<UpdateParameters> params) {
// Lock on the parameters
std::lock_guard<std::mutex> lock(updateMutex);
updateParameters = std::move(params);
}
void MapRenderer::setObserver(std::shared_ptr<RendererObserver> _rendererObserver) {
// Lock as the initialization can come from the main thread or the GL thread first
std::lock_guard<std::mutex> lock(initialisationMutex);
rendererObserver = std::move(_rendererObserver);
// Set the new observer on the Renderer implementation
if (renderer) {
renderer->setObserver(rendererObserver.get());
}
}
void MapRenderer::requestSnapshot(SnapshotCallback callback) {
auto self = ActorRef<MapRenderer>(*this, mailbox);
self.invoke(
&MapRenderer::scheduleSnapshot,
std::make_unique<SnapshotCallback>([&, callback=std::move(callback), runloop=util::RunLoop::Get()](PremultipliedImage image) {
runloop->invoke([callback=std::move(callback), image=std::move(image), renderer=std::move(this)]() mutable {
if (renderer && !renderer->destroyed) {
callback(std::move(image));
}
});
snapshotCallback.reset();
})
);
}
// Called on OpenGL thread //
void MapRenderer::resetRenderer() {
renderer.reset();
}
void MapRenderer::scheduleSnapshot(std::unique_ptr<SnapshotCallback> callback) {
snapshotCallback = std::move(callback);
requestRender();
}
void MapRenderer::render(JNIEnv&) {
assert (renderer);
std::shared_ptr<UpdateParameters> params;
{
// Lock on the parameters
std::unique_lock<std::mutex> lock(updateMutex);
if (!updateParameters) return;
// Hold on to the update parameters during render
params = updateParameters;
}
// Activate the backend
gfx::BackendScope backendGuard { *backend };
// Ensure that the "current" scheduler on the render thread is
// this scheduler.
Scheduler::SetCurrent(this);
if (framebufferSizeChanged) {
backend->updateViewPort();
framebufferSizeChanged = false;
}
renderer->render(*params);
// Deliver the snapshot if requested
if (snapshotCallback) {
snapshotCallback->operator()(backend->readFramebuffer());
snapshotCallback.reset();
}
}
void MapRenderer::onSurfaceCreated(JNIEnv&) {
// Lock as the initialization can come from the main thread or the GL thread first
std::lock_guard<std::mutex> lock(initialisationMutex);
// The GL context is already active if get a new surface.
gfx::BackendScope backendGuard { *backend, gfx::BackendScope::ScopeType::Implicit };
// The android system will have already destroyed the underlying
// GL resources if this is not the first initialization and an
// attempt to clean them up will fail
if (backend) backend->markContextLost();
if (renderer) renderer->markContextLost();
// Reset in opposite order
renderer.reset();
backend.reset();
// Create the new backend and renderer
backend = std::make_unique<AndroidRendererBackend>();
renderer = std::make_unique<Renderer>(*backend, pixelRatio, localIdeographFontFamily);
rendererRef = std::make_unique<ActorRef<Renderer>>(*renderer, mailbox);
// Set the observer on the new Renderer implementation
if (rendererObserver) {
renderer->setObserver(rendererObserver.get());
}
}
void MapRenderer::onSurfaceChanged(JNIEnv& env, jint width, jint height) {
if (!renderer) {
// In case the surface has been destroyed (due to app back-grounding)
onSurfaceCreated(env);
}
backend->resizeFramebuffer(width, height);
framebufferSizeChanged = true;
requestRender();
}
void MapRenderer::onRendererReset(JNIEnv&) {
// Make sure to destroy the renderer on the GL Thread
auto self = ActorRef<MapRenderer>(*this, mailbox);
self.ask(&MapRenderer::resetRenderer).wait();
}
// needs to be called on GL thread
void MapRenderer::onSurfaceDestroyed(JNIEnv&) {
resetRenderer();
}
// Static methods //
void MapRenderer::registerNative(jni::JNIEnv& env) {
// Lookup the class
static auto& javaClass = jni::Class<MapRenderer>::Singleton(env);
#define METHOD(MethodPtr, name) jni::MakeNativePeerMethod<decltype(MethodPtr), (MethodPtr)>(name)
// Register the peer
jni::RegisterNativePeer<MapRenderer>(env, javaClass, "nativePtr",
jni::MakePeer<MapRenderer, const jni::Object<MapRenderer>&, jni::jfloat, const jni::String&>,
"nativeInitialize", "finalize",
METHOD(&MapRenderer::render, "nativeRender"),
METHOD(&MapRenderer::onRendererReset, "nativeReset"),
METHOD(&MapRenderer::onSurfaceCreated,
"nativeOnSurfaceCreated"),
METHOD(&MapRenderer::onSurfaceChanged,
"nativeOnSurfaceChanged"),
METHOD(&MapRenderer::onSurfaceDestroyed,
"nativeOnSurfaceDestroyed"));
}
MapRenderer& MapRenderer::getNativePeer(JNIEnv& env, const jni::Object<MapRenderer>& jObject) {
static auto& javaClass = jni::Class<MapRenderer>::Singleton(env);
static auto field = javaClass.GetField<jlong>(env, "nativePtr");
MapRenderer* mapRenderer = reinterpret_cast<MapRenderer*>(jObject.Get(env, field));
assert(mapRenderer != nullptr);
return *mapRenderer;
}
} // namespace android
} // namespace mbgl
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