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#include <mbgl/map/map_snapshotter.hpp>
#include <mbgl/actor/actor_ref.hpp>
#include <mbgl/gl/headless_frontend.hpp>
#include <mbgl/map/map.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mbgl/style/style.hpp>
#include <mbgl/util/event.hpp>
namespace mbgl {
class MapSnapshotter::Impl {
public:
Impl(FileSource&,
Scheduler&,
const std::string& styleURL,
const Size&,
const float pixelRatio,
const CameraOptions&,
const optional<LatLngBounds> region,
const optional<std::string> programCacheDir);
void snapshot(ActorRef<MapSnapshotter::Callback>);
private:
HeadlessFrontend frontend;
Map map;
};
MapSnapshotter::Impl::Impl(FileSource& fileSource,
Scheduler& scheduler,
const std::string& styleURL,
const Size& size,
const float pixelRatio,
const CameraOptions& cameraOptions,
const optional<LatLngBounds> region,
const optional<std::string> programCacheDir)
: frontend(size, pixelRatio, fileSource, scheduler, programCacheDir)
, map(frontend, MapObserver::nullObserver(), size, pixelRatio, fileSource, scheduler, MapMode::Still) {
map.getStyle().loadURL(styleURL);
map.jumpTo(cameraOptions);
// Set region, if specified
if (region) {
mbgl::EdgeInsets insets = { 0, 0, 0, 0 };
std::vector<LatLng> latLngs = { region->southwest(), region->northeast() };
map.jumpTo(map.cameraForLatLngs(latLngs, insets));
}
}
void MapSnapshotter::Impl::snapshot(ActorRef<MapSnapshotter::Callback> callback) {
map.renderStill([this, callback = std::move(callback)] (std::exception_ptr error) mutable {
callback.invoke(&MapSnapshotter::Callback::operator(), error, error ? PremultipliedImage() : frontend.readStillImage());
});
}
MapSnapshotter::MapSnapshotter(FileSource& fileSource,
Scheduler& scheduler,
const std::string& styleURL,
const Size& size,
const float pixelRatio,
const CameraOptions& cameraOptions,
const optional<LatLngBounds> region,
const optional<std::string> programCacheDir)
: impl(std::make_unique<util::Thread<MapSnapshotter::Impl>>("Map Snapshotter", fileSource, scheduler, styleURL, size, pixelRatio, cameraOptions, region, programCacheDir)) {
}
MapSnapshotter::~MapSnapshotter() = default;
void MapSnapshotter::snapshot(ActorRef<MapSnapshotter::Callback> callback) {
impl->actor().invoke(&Impl::snapshot, std::move(callback));
}
} // namespace mbgl
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