blob: 038a6dcb044c1c56b15caa43a761c42ade87f06e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
#pragma once
#include <mbgl/style/layer.hpp>
namespace mbgl {
class LayerFactory;
class RenderLayer;
/**
* @brief A singleton class responsible for creating layer instances.
*
* The LayerManager has implementation per platform. The LayerManager implementation
* defines what layer types are available and it can also disable annotations.
*
* Linker excludes the unreachable code for the disabled annotations and layers
* from the binaries, significantly reducing their size.
*/
class LayerManager {
public:
/**
* @brief A singleton getter.
*
* @return LayerManager*
*/
static LayerManager* get() noexcept;
/// Returns a new Layer instance on success call; returns `nulltptr` otherwise.
std::unique_ptr<style::Layer> createLayer(const std::string& type, const std::string& id,
const style::conversion::Convertible& value, style::conversion::Error& error) noexcept;
/// Returns a new RenderLayer instance on success call; returns `nulltptr` otherwise.
std::unique_ptr<RenderLayer> createRenderLayer(Immutable<style::Layer::Impl>) noexcept;
/**
* @brief a build-time flag to enable/disable annotations in mapbox-gl-native core.
*
* At the moment, the annotations implementation in core is creating concrete
* layer instances apart from LayerManager/LayerFactory code path.
*
* So, annotations must be disabled if the LayerManager implementation does
* not provide line, fill or symbol layers (those, used by the annotations
* implementation).
*
* Note: in future, annotations implemantation will be moved from the core to platform
* SDK (see https://github.com/mapbox/mapbox-plugins-android/tree/master/plugin-annotation)
* and this flag won't be needed any more.
*/
static const bool annotationsEnabled;
protected:
virtual ~LayerManager() = default;
virtual LayerFactory* getFactory(const std::string& type) noexcept = 0;
virtual LayerFactory* getFactory(const style::LayerTypeInfo*) noexcept = 0;
};
} // namespace mbgl
|
