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