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#include <mbgl/map/raster_tile_data.hpp>
#include <mbgl/map/source.hpp>
#include <mbgl/storage/resource.hpp>
#include <mbgl/storage/response.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mbgl/util/worker.hpp>
#include <mbgl/util/work_request.hpp>
using namespace mbgl;
RasterTileData::RasterTileData(const TileID& id_,
float pixelRatio,
const std::string& urlTemplate,
TexturePool &texturePool_,
Worker& worker_,
const std::function<void(std::exception_ptr)>& callback)
: TileData(id_),
texturePool(texturePool_),
worker(worker_) {
state = State::loading;
const Resource resource = Resource::tile(urlTemplate, pixelRatio, id.x, id.y, id.sourceZ);
req = util::ThreadContext::getFileSource()->request(resource, [callback, this](Response res) {
if (res.error) {
std::exception_ptr error;
if (res.error->reason == Response::Error::Reason::NotFound) {
// This is a 404 response. We're treating these as empty tiles.
workRequest.reset();
state = State::parsed;
bucket.reset();
} else {
// This is a different error, e.g. a connection or server error.
error = std::make_exception_ptr(std::runtime_error(res.error->message));
}
callback(error);
return;
}
modified = res.modified;
expires = res.expires;
if (res.notModified) {
// We got the same data again. Abort early.
return;
}
if (state == State::loading) {
// Only overwrite the state when we didn't have a previous tile.
state = State::loaded;
}
workRequest.reset();
workRequest = worker.parseRasterTile(std::make_unique<RasterBucket>(texturePool), res.data, [this, callback] (RasterTileParseResult result) {
workRequest.reset();
if (state != State::loaded) {
return;
}
std::exception_ptr error;
if (result.is<std::unique_ptr<Bucket>>()) {
state = State::parsed;
bucket = std::move(result.get<std::unique_ptr<Bucket>>());
} else {
error = result.get<std::exception_ptr>();
state = State::obsolete;
bucket.reset();
}
callback(error);
});
});
}
RasterTileData::~RasterTileData() {
cancel();
}
Bucket* RasterTileData::getBucket(StyleLayer const&) {
return bucket.get();
}
void RasterTileData::cancel() {
if (state != State::obsolete) {
state = State::obsolete;
}
req = nullptr;
workRequest.reset();
}
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