blob: e4a5634b88a3d1de53f61e2d538177c5fb9802fe (
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
|
#pragma once
#include <mbgl/map/change.hpp>
namespace mbgl {
class Map;
class Backend {
public:
virtual ~Backend() = default;
// Called when the backend's GL context needs to be made active or inactive. These are called,
// as a matched pair, in four situations:
//
// 1. When releasing GL resources during Map destruction
// 2. When calling a CustomLayerInitializeFunction, during Map::addLayer
// 3. When calling a CustomLayerDeinitializeFunction, during Map::removeLayer
// 4. When rendering for Map::renderStill
//
// They are *not* called for Map::render; it is assumed that the correct context is already
// activated prior to calling Map::render.
virtual void activate() = 0;
virtual void deactivate() = 0;
// Called when the map needs to be rendered; the backend should call Map::render() at some point
// in the near future. (Not called for Map::renderStill() mode.)
virtual void invalidate() = 0;
// Notifies a watcher of map x/y/scale/rotation changes.
virtual void notifyMapChange(MapChange change);
};
} // namespace mbgl
|
