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#include <mbgl/map/sprite.hpp>
#include <mbgl/map/map.hpp>
#include <mbgl/util/raster.hpp>
#include <mbgl/platform/log.hpp>
#include <string>
#include <mbgl/platform/platform.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mbgl/util/uv_detail.hpp>
#include <mbgl/util/std.hpp>
#include <rapidjson/document.h>
using namespace mbgl;
SpritePosition::SpritePosition(uint16_t x_, uint16_t y_, uint16_t width_, uint16_t height_, float pixelRatio_, bool sdf_)
: x(x_),
y(y_),
width(width_),
height(height_),
pixelRatio(pixelRatio_),
sdf(sdf_) {
}
util::ptr<Sprite> Sprite::Create(const std::string& base_url, float pixelRatio, FileSource& fileSource) {
util::ptr<Sprite> sprite(std::make_shared<Sprite>(Key(), base_url, pixelRatio));
sprite->load(fileSource);
return sprite;
}
Sprite::Sprite(const Key &, const std::string& base_url, float pixelRatio_)
: valid(base_url.length() > 0),
pixelRatio(pixelRatio_),
spriteURL(base_url + (pixelRatio_ > 1 ? "@2x" : "") + ".png"),
jsonURL(base_url + (pixelRatio_ > 1 ? "@2x" : "") + ".json"),
raster(),
loadedImage(false),
loadedJSON(false),
future(promise.get_future()) {
}
void Sprite::waitUntilLoaded() const {
future.wait();
}
Sprite::operator bool() const {
return valid && isLoaded() && !pos.empty();
}
// Note: This is a separate function that must be called exactly once after creation
// The reason this isn't part of the constructor is that calling shared_from_this() in
// the constructor fails.
void Sprite::load(FileSource& fileSource) {
if (!valid) {
// Treat a non-existent sprite as a successfully loaded empty sprite.
loadedImage = true;
loadedJSON = true;
promise.set_value();
return;
}
util::ptr<Sprite> sprite = shared_from_this();
fileSource.request(ResourceType::JSON, jsonURL)->onload([sprite](const Response &res) {
if (res.code == 200) {
sprite->body = res.data;
sprite->parseJSON();
sprite->complete();
} else {
Log::Warning(Event::Sprite, "Failed to load sprite info: Error %d: %s", res.code, res.message.c_str());
if (!sprite->future.valid()) {
sprite->promise.set_exception(std::make_exception_ptr(std::runtime_error(res.message)));
}
}
});
fileSource.request(ResourceType::Image, spriteURL)->onload([sprite](const Response &res) {
if (res.code == 200) {
sprite->image = res.data;
sprite->parseImage();
sprite->complete();
} else {
Log::Warning(Event::Sprite, "Failed to load sprite image: Error %d: %s", res.code, res.message.c_str());
if (!sprite->future.valid()) {
sprite->promise.set_exception(std::make_exception_ptr(std::runtime_error(res.message)));
}
}
});
}
void Sprite::complete() {
if (loadedImage && loadedJSON) {
Log::Info(Event::Sprite, "loaded %s", spriteURL.c_str());
promise.set_value();
}
}
bool Sprite::isLoaded() const {
return loadedImage && loadedJSON;
}
void Sprite::parseImage() {
raster = util::make_unique<util::Image>(image);
if (!*raster) {
raster.reset();
}
image.clear();
loadedImage = true;
}
void Sprite::parseJSON() {
rapidjson::Document d;
d.Parse<0>(body.c_str());
body.clear();
if (d.HasParseError()) {
Log::Warning(Event::Sprite, "sprite JSON is invalid");
} else if (d.IsObject()) {
for (rapidjson::Value::ConstMemberIterator itr = d.MemberBegin(); itr != d.MemberEnd(); ++itr) {
const std::string& name = itr->name.GetString();
const rapidjson::Value& value = itr->value;
if (value.IsObject()) {
uint16_t x = 0;
uint16_t y = 0;
uint16_t width = 0;
uint16_t height = 0;
float spritePixelRatio = 1.0f;
bool sdf = false;
if (value.HasMember("x")) x = value["x"].GetInt();
if (value.HasMember("y")) y = value["y"].GetInt();
if (value.HasMember("width")) width = value["width"].GetInt();
if (value.HasMember("height")) height = value["height"].GetInt();
if (value.HasMember("pixelRatio")) spritePixelRatio = value["pixelRatio"].GetInt();
if (value.HasMember("sdf")) sdf = value["sdf"].GetBool();
pos.emplace(name, SpritePosition { x, y, width, height, spritePixelRatio, sdf });
}
}
} else {
Log::Warning(Event::Sprite, "sprite JSON root is not an object");
}
loadedJSON = true;
}
const SpritePosition &Sprite::getSpritePosition(const std::string& name) const {
if (!isLoaded()) return empty;
auto it = pos.find(name);
return it == pos.end() ? empty : it->second;
}
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