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#include "android_renderer_frontend.hpp"
#include <mbgl/actor/scheduler.hpp>
#include <mbgl/renderer/backend_scope.hpp>
#include <mbgl/renderer/renderer.hpp>
#include <mbgl/renderer/renderer_observer.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mbgl/util/thread.hpp>
#include <mbgl/util/run_loop.hpp>
#include "android_renderer_backend.hpp"
namespace mbgl {
namespace android {
// Forwards RendererObserver signals to the given
// Delegate RendererObserver on the given RunLoop
class ForwardingRendererObserver : public RendererObserver {
public:
ForwardingRendererObserver(util::RunLoop& mapRunLoop_, RendererObserver& delegate_)
: mapRunLoop(mapRunLoop_)
, delegate(delegate_) {}
void onInvalidate() override {
mapRunLoop.invoke([&]() {
delegate.onInvalidate();
});
}
void onResourceError(std::exception_ptr err) override {
mapRunLoop.invoke([&, err]() {
delegate.onResourceError(err);
});
}
void onWillStartRenderingMap() override {
mapRunLoop.invoke([&]() {
delegate.onWillStartRenderingMap();
});
}
void onWillStartRenderingFrame() override {
mapRunLoop.invoke([&]() {
delegate.onWillStartRenderingFrame();
});
}
void onDidFinishRenderingFrame(RenderMode mode, bool repaintNeeded) override {
mapRunLoop.invoke([&, mode, repaintNeeded]() {
delegate.onDidFinishRenderingFrame(mode, repaintNeeded);
});
}
void onDidFinishRenderingMap() override {
mapRunLoop.invoke([&]() {
delegate.onDidFinishRenderingMap();
});
}
private:
util::RunLoop& mapRunLoop;
RendererObserver& delegate;
};
AndroidRendererFrontend::AndroidRendererFrontend(float pixelRatio_,
FileSource& fileSource_,
Scheduler& scheduler_,
std::string programCacheDir_,
InvalidateCallback invalidate_)
: pixelRatio(pixelRatio_)
, fileSource(fileSource_)
, scheduler(scheduler_)
, programCacheDir(programCacheDir_)
, asyncInvalidate([=, invalidate=std::move(invalidate_)]() {
invalidate();
})
, mapRunLoop(util::RunLoop::Get()) {
}
AndroidRendererFrontend::~AndroidRendererFrontend() = default;
void AndroidRendererFrontend::reset() {
assert(renderer);
renderer.reset();
}
void AndroidRendererFrontend::initialise() {
// Lock as the initialization can come from the main thread or the GL thread first
std::lock_guard<std::mutex> lock(intitialisationMutex);
if (backend) {
// The android system will have already destroyed the underlying
// GL resources and an attempt to clean them up will fail
backend->abandonContext();
}
// Destroy in reverse order
renderer.reset();
backend.reset();
// Re-create
backend = std::make_unique<AndroidRendererBackend>();
renderer = std::make_unique<util::Thread<Renderer>>(
"Orchestration Thread",
*backend,
pixelRatio,
fileSource,
scheduler,
GLContextMode::Unique,
programCacheDir
);
// Set the observer on the new Renderer implementation
if (rendererObserver) {
renderer->actor().invoke(&Renderer::setObserver, rendererObserver.get());
}
}
void AndroidRendererFrontend::setObserver(RendererObserver& observer) {
assert (util::RunLoop::Get());
// Lock as the initialization can come from the main thread or the GL thread first
std::lock_guard<std::mutex> lock(intitialisationMutex);
rendererObserver = std::make_unique<ForwardingRendererObserver>(*mapRunLoop, observer);
// Set the new observer on the Renderer implementation
if (renderer) {
renderer->actor().invoke(&Renderer::setObserver, rendererObserver.get());
}
}
void AndroidRendererFrontend::update(std::shared_ptr<UpdateParameters> params) {
{
// Lock on the parameters
std::lock_guard<std::mutex> lock(updateMutex);
updateParameters = std::move(params);
}
asyncInvalidate.send();
}
// Called on OpenGL thread
void AndroidRendererFrontend::render() {
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
BackendScope backendGuard { *backend };
// Block the orchestration thread during render
util::BlockingThreadGuard<Renderer> rendererGuard { *renderer };
// Ensure that the "current" scheduler on the render thread is
// actually the scheduler from the orchestration thread
Scheduler::SetCurrent(renderer.get());
if (framebufferSizeChanged) {
backend->updateViewPort();
framebufferSizeChanged = false;
}
rendererGuard.object().render(*params);
}
void AndroidRendererFrontend::onLowMemory() {
assert (renderer);
renderer->actor().invoke(&Renderer::onLowMemory);
}
std::vector<Feature> AndroidRendererFrontend::querySourceFeatures(const std::string& sourceID,
const SourceQueryOptions& options) const {
assert (renderer);
// Waits for the result from the orchestration thread and returns
return renderer->actor().ask(&Renderer::querySourceFeatures, sourceID, options).get();
}
std::vector<Feature> AndroidRendererFrontend::queryRenderedFeatures(const ScreenBox& box,
const RenderedQueryOptions& options) const {
assert (renderer);
// Select the right overloaded method
std::vector<Feature> (Renderer::*fn)(const ScreenBox&, const RenderedQueryOptions&) const = &Renderer::queryRenderedFeatures;
// Waits for the result from the orchestration thread and returns
return renderer->actor().ask(fn, box, options).get();
}
std::vector<Feature> AndroidRendererFrontend::queryRenderedFeatures(const ScreenCoordinate& point,
const RenderedQueryOptions& options) const {
assert (renderer);
// Select the right overloaded method
std::vector<Feature> (Renderer::*fn)(const ScreenCoordinate&, const RenderedQueryOptions&) const = &Renderer::queryRenderedFeatures;
// Waits for the result from the orchestration thread and returns
return renderer->actor().ask(fn, point, options).get();
}
AnnotationIDs AndroidRendererFrontend::queryPointAnnotations(const ScreenBox& box) const {
assert (renderer);
// Waits for the result from the orchestration thread and returns
return renderer->actor().ask(&Renderer::queryPointAnnotations, box).get();
}
void AndroidRendererFrontend::requestSnapshot(SnapshotCallback callback_) {
snapshotCallback = std::make_unique<SnapshotCallback>([callback=std::move(callback_), runloop=util::RunLoop::Get()](PremultipliedImage image){
runloop->invoke([&]() {
callback(std::move(image));
});
});
}
void AndroidRendererFrontend::resizeFramebuffer(int width, int height) {
util::BlockingThreadGuard<Renderer> guard { *renderer };
backend->resizeFramebuffer(width, height);
framebufferSizeChanged = true;
// TODO: thread safe?
asyncInvalidate.send();
}
} // namespace android
} // namespace mbgl
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