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#include "map_snapshotter.hpp"
#include <mbgl/renderer/renderer.hpp>
#include <mbgl/style/style.hpp>
#include <mbgl/util/shared_thread_pool.hpp>
#include <mbgl/util/logging.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/actor/scheduler.hpp>
#include "../attach_env.hpp"
#include "../bitmap.hpp"
namespace mbgl {
namespace android {
MapSnapshotter::MapSnapshotter(jni::JNIEnv& _env,
jni::Object<MapSnapshotter> _obj,
jni::Object<FileSource> jFileSource,
jni::jfloat _pixelRatio,
jni::jint width,
jni::jint height,
jni::String styleURL,
jni::Object<LatLngBounds> region,
jni::Object<CameraPosition> position,
jni::String _programCacheDir)
: javaPeer(SeizeGenericWeakRef(_env, jni::Object<MapSnapshotter>(jni::NewWeakGlobalRef(_env, _obj.Get()).release())))
, pixelRatio(_pixelRatio)
, threadPool(sharedThreadPool()) {
// Get a reference to the JavaVM for callbacks
if (_env.GetJavaVM(&vm) < 0) {
_env.ExceptionDescribe();
return;
}
auto& fileSource = mbgl::android::FileSource::getDefaultFileSource(_env, jFileSource);
auto size = mbgl::Size { static_cast<uint32_t>(width), static_cast<uint32_t>(height) };
auto cameraOptions = position ? CameraPosition::getCameraOptions(_env, position) : CameraOptions();
optional<mbgl::LatLngBounds> bounds;
if (region) {
bounds = LatLngBounds::getLatLngBounds(_env, region);
}
// Create the core snapshotter
snapshotter = std::make_unique<mbgl::MapSnapshotter>(fileSource,
*threadPool,
jni::Make<std::string>(_env, styleURL),
size,
pixelRatio,
cameraOptions,
bounds,
jni::Make<std::string>(_env, _programCacheDir));
}
MapSnapshotter::~MapSnapshotter() = default;
void MapSnapshotter::start(JNIEnv&) {
MBGL_VERIFY_THREAD(tid);
snapshotCallback = std::make_unique<Actor<mbgl::MapSnapshotter::Callback>>(*Scheduler::GetCurrent(), [this](std::exception_ptr err, PremultipliedImage image) {
MBGL_VERIFY_THREAD(tid);
android::UniqueEnv _env = android::AttachEnv();
if (err) {
// error handler callback
static auto onSnapshotFailed = javaClass.GetMethod<void (jni::String)>(*_env, "onSnapshotFailed");
javaPeer->Call(*_env, onSnapshotFailed, jni::Make<jni::String>(*_env, util::toString(err)));
} else {
// Create the bitmap
auto bitmap = Bitmap::CreateBitmap(*_env, std::move(image));
// invoke callback
static auto onSnapshotReady = javaClass.GetMethod<void (jni::Object<Bitmap>)>(*_env, "onSnapshotReady");
javaPeer->Call(*_env, onSnapshotReady, bitmap);
}
});
snapshotter->snapshot(snapshotCallback->self());
}
void MapSnapshotter::cancel(JNIEnv&) {
MBGL_VERIFY_THREAD(tid);
snapshotCallback.reset();
snapshotter.reset();
}
// Static methods //
jni::Class<MapSnapshotter> MapSnapshotter::javaClass;
void MapSnapshotter::registerNative(jni::JNIEnv& env) {
// Lookup the class
MapSnapshotter::javaClass = *jni::Class<MapSnapshotter>::Find(env).NewGlobalRef(env).release();
#define METHOD(MethodPtr, name) jni::MakeNativePeerMethod<decltype(MethodPtr), (MethodPtr)>(name)
// Register the peer
jni::RegisterNativePeer<MapSnapshotter>(env, MapSnapshotter::javaClass, "nativePtr",
std::make_unique<MapSnapshotter, JNIEnv&, jni::Object<MapSnapshotter>, jni::Object<FileSource>, jni::jfloat, jni::jint, jni::jint, jni::String, jni::Object<LatLngBounds>, jni::Object<CameraPosition>, jni::String>,
"nativeInitialize",
"finalize",
METHOD(&MapSnapshotter::start, "nativeStart"),
METHOD(&MapSnapshotter::cancel, "nativeCancel")
);
}
} // namespace android
} // namespace mbgl
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