diff options
Diffstat (limited to 'platform/android/src/snapshotter/map_snapshotter.cpp')
| -rw-r--r-- | platform/android/src/snapshotter/map_snapshotter.cpp | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/platform/android/src/snapshotter/map_snapshotter.cpp b/platform/android/src/snapshotter/map_snapshotter.cpp new file mode 100644 index 0000000000..d64218d11a --- /dev/null +++ b/platform/android/src/snapshotter/map_snapshotter.cpp @@ -0,0 +1,110 @@ +#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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