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#include <mbgl/sprite/sprite_store.hpp>
#include <mbgl/sprite/sprite_parser.hpp>
#include <mbgl/platform/log.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mbgl/storage/resource.hpp>
#include <mbgl/storage/response.hpp>
#include <mbgl/util/exception.hpp>
#include <cassert>
#include <string>
namespace mbgl {
struct SpriteStore::Loader {
std::shared_ptr<const std::string> image;
std::shared_ptr<const std::string> json;
std::unique_ptr<AsyncRequest> jsonRequest;
std::unique_ptr<AsyncRequest> spriteRequest;
};
SpriteStore::SpriteStore(float pixelRatio_)
: pixelRatio(pixelRatio_ > 1 ? 2 : 1) {
}
SpriteStore::~SpriteStore() = default;
void SpriteStore::load(const std::string& url, FileSource& fileSource) {
if (url.empty()) {
// Treat a non-existent sprite as a successfully loaded empty sprite.
loaded = true;
return;
}
loader = std::make_unique<Loader>();
loader->jsonRequest = fileSource.request(Resource::spriteJSON(url, pixelRatio), [this](Response res) {
if (res.error) {
observer->onSpriteError(std::make_exception_ptr(std::runtime_error(res.error->message)));
} else if (res.notModified) {
return;
} else if (res.noContent) {
loader->json = std::make_shared<const std::string>();
emitSpriteLoadedIfComplete();
} else {
// Only trigger a sprite loaded event we got new data.
loader->json = res.data;
emitSpriteLoadedIfComplete();
}
});
loader->spriteRequest = fileSource.request(Resource::spriteImage(url, pixelRatio), [this](Response res) {
if (res.error) {
observer->onSpriteError(std::make_exception_ptr(std::runtime_error(res.error->message)));
} else if (res.notModified) {
return;
} else if (res.noContent) {
loader->image = std::make_shared<const std::string>();
emitSpriteLoadedIfComplete();
} else {
loader->image = res.data;
emitSpriteLoadedIfComplete();
}
});
}
void SpriteStore::emitSpriteLoadedIfComplete() {
assert(loader);
if (!loader->image || !loader->json) {
return;
}
auto result = parseSprite(*loader->image, *loader->json);
if (result.is<Sprites>()) {
loaded = true;
setSprites(result.get<Sprites>());
observer->onSpriteLoaded();
} else {
observer->onSpriteError(result.get<std::exception_ptr>());
}
}
void SpriteStore::setObserver(Observer* observer_) {
observer = observer_;
}
void SpriteStore::dumpDebugLogs() const {
Log::Info(Event::General, "SpriteStore::loaded: %d", loaded);
}
void SpriteStore::setSprite(const std::string& name, std::shared_ptr<const SpriteImage> sprite) {
std::lock_guard<std::mutex> lock(mutex);
_setSprite(name, sprite);
}
void SpriteStore::_setSprite(const std::string& name,
const std::shared_ptr<const SpriteImage>& sprite) {
if (sprite) {
auto it = sprites.find(name);
if (it != sprites.end()) {
// There is already a sprite with that name in our store.
if ((it->second->image.width != sprite->image.width || it->second->image.height != sprite->image.height)) {
Log::Warning(Event::Sprite, "Can't change sprite dimensions for '%s'", name.c_str());
return;
}
it->second = sprite;
} else {
sprites.emplace(name, sprite);
}
// Always add/replace the value in the dirty list.
auto dirty_it = dirty.find(name);
if (dirty_it != dirty.end()) {
dirty_it->second = sprite;
} else {
dirty.emplace(name, sprite);
}
} else if (sprites.erase(name) > 0) {
dirty.emplace(name, nullptr);
}
}
void SpriteStore::setSprites(const Sprites& newSprites) {
std::lock_guard<std::mutex> lock(mutex);
for (const auto& pair : newSprites) {
_setSprite(pair.first, pair.second);
}
}
void SpriteStore::removeSprite(const std::string& name) {
std::lock_guard<std::mutex> lock(mutex);
_setSprite(name);
}
std::shared_ptr<const SpriteImage> SpriteStore::getSprite(const std::string& name) {
std::lock_guard<std::mutex> lock(mutex);
const auto it = sprites.find(name);
if (it != sprites.end()) {
return it->second;
} else {
if (!sprites.empty()) {
Log::Info(Event::Sprite, "Can't find sprite named '%s'", name.c_str());
}
return nullptr;
}
}
SpriteStore::Sprites SpriteStore::getDirty() {
Sprites result;
std::lock_guard<std::mutex> lock(mutex);
dirty.swap(result);
return result;
}
} // namespace mbgl
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