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#include <mbgl/map/sprite.hpp>
#include <mbgl/platform/log.hpp>
#include <mbgl/platform/platform.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mbgl/storage/resource.hpp>
#include <mbgl/storage/response.hpp>
#include <mbgl/util/exception.hpp>
#include <mbgl/util/raster.hpp>
#include <mbgl/util/thread.hpp>
#include <mbgl/util/uv_detail.hpp>
#include <mbgl/util/mapbox.hpp>
#include <rapidjson/document.h>
#include <string>
#include <sstream>
namespace mbgl {
struct Sprite::Loader {
bool loadedJSON = false;
bool loadedImage = false;
std::unique_ptr<Data> data = std::make_unique<Data>();
Request* jsonRequest = nullptr;
Request* spriteRequest = nullptr;
~Loader() {
if (jsonRequest) {
util::ThreadContext::getFileSource()->cancel(jsonRequest);
}
if (spriteRequest) {
util::ThreadContext::getFileSource()->cancel(spriteRequest);
}
}
};
Sprite::Sprite(const std::string& baseUrl, float pixelRatio_)
: pixelRatio(pixelRatio_ > 1 ? 2 : 1) {
if (baseUrl.empty()) {
// Treat a non-existent sprite as a successfully loaded empty sprite.
loaded = true;
return;
}
std::string spriteURL(baseUrl + (pixelRatio_ > 1 ? "@2x" : "") + ".png");
std::string jsonURL(baseUrl + (pixelRatio_ > 1 ? "@2x" : "") + ".json");
loader = std::make_unique<Loader>();
FileSource* fs = util::ThreadContext::getFileSource();
loader->jsonRequest = fs->request({ Resource::Kind::SpriteJSON, jsonURL }, util::RunLoop::getLoop(),
[this, jsonURL](const Response& res) {
loader->jsonRequest = nullptr;
if (res.status == Response::Successful) {
loader->data->json = res.data;
loader->loadedJSON = true;
} else {
std::stringstream message;
message << "Failed to load [" << jsonURL << "]: " << res.message;
emitSpriteLoadingFailed(message.str());
return;
}
emitSpriteLoadedIfComplete();
});
loader->spriteRequest =
fs->request({ Resource::Kind::SpriteImage, spriteURL }, util::RunLoop::getLoop(),
[this, spriteURL](const Response& res) {
loader->spriteRequest = nullptr;
if (res.status == Response::Successful) {
loader->data->image = res.data;
loader->loadedImage = true;
} else {
std::stringstream message;
message << "Failed to load [" << spriteURL << "]: " << res.message;
emitSpriteLoadingFailed(message.str());
return;
}
emitSpriteLoadedIfComplete();
});
}
Sprite::~Sprite() {
}
void Sprite::emitSpriteLoadedIfComplete() {
assert(loader);
if (!loader->loadedImage || !loader->loadedJSON || !observer) {
return;
}
std::unique_ptr<Data> data(std::move(loader->data));
loader.reset();
auto result = parseSprite(data->image, data->json);
if (result.is<Sprites>()) {
loaded = true;
observer->onSpriteLoaded(result.get<Sprites>());
} else {
emitSpriteLoadingFailed(result.get<std::string>());
}
}
void Sprite::emitSpriteLoadingFailed(const std::string& message) {
if (!observer) {
return;
}
auto error = std::make_exception_ptr(util::SpriteLoadingException(message));
observer->onSpriteLoadingFailed(error);
}
void Sprite::setObserver(Observer* observer_) {
observer = observer_;
}
} // namespace mbgl
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