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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
#include "map_renderer.hpp"
#include <mbgl/renderer/renderer.hpp>
#include <mbgl/util/shared_thread_pool.hpp>
#include <mbgl/util/run_loop.hpp>
#include <string>
#include "attach_env.hpp"
#include "android_renderer_backend.hpp"
#include "map_renderer_runnable.hpp"
#include "file_source.hpp"
namespace mbgl {
namespace android {
MapRenderer::MapRenderer(jni::JNIEnv& _env, jni::Object<MapRenderer> obj,
jni::Object<FileSource> _fileSource, jni::jfloat pixelRatio_,
jni::String programCacheDir_,
jni::String localIdeographFontFamily_)
: javaPeer(SeizeGenericWeakRef(_env, jni::Object<MapRenderer>(jni::NewWeakGlobalRef(_env, obj.Get()).release()))), pixelRatio(pixelRatio_)
, fileSource(FileSource::getDefaultFileSource(_env, _fileSource))
, programCacheDir(jni::Make<std::string>(_env, programCacheDir_))
, localIdeographFontFamily(localIdeographFontFamily_ == nullptr ? optional<std::string>{} : jni::Make<std::string>(_env, localIdeographFontFamily_ ))
, threadPool(sharedThreadPool())
, mailbox(std::make_shared<Mailbox>(*this)) {
}
MapRenderer::~MapRenderer() = default;
void MapRenderer::reset() {
// Make sure to destroy the renderer on the GL Thread
auto self = ActorRef<MapRenderer>(*this, mailbox);
self.ask(&MapRenderer::resetRenderer).wait();
// Lock to make sure there is no concurrent initialisation on the gl thread
std::lock_guard<std::mutex> lock(initialisationMutex);
rendererObserver.reset();
}
ActorRef<Renderer> MapRenderer::actor() const {
return *rendererRef;
}
void MapRenderer::schedule(std::weak_ptr<Mailbox> scheduled) {
// Create a runnable
android::UniqueEnv _env = android::AttachEnv();
auto runnable = std::make_unique<MapRendererRunnable>(*_env, std::move(scheduled));
// Obtain ownership of the peer (gets transferred to the MapRenderer on the JVM for later GC)
auto peer = runnable->peer();
// Queue the event on the Java Peer
static auto queueEvent = javaClass.GetMethod<void(
jni::Object<MapRendererRunnable>)>(*_env, "queueEvent");
javaPeer->Call(*_env, queueEvent, *peer);
// Release the c++ peer as it will be destroyed on GC of the Java Peer
runnable.release();
}
void MapRenderer::requestRender() {
android::UniqueEnv _env = android::AttachEnv();
static auto onInvalidate = javaClass.GetMethod<void()>(*_env, "requestRender");
javaPeer->Call(*_env, onInvalidate);
}
void MapRenderer::update(std::shared_ptr<UpdateParameters> params) {
// Lock on the parameters
std::lock_guard<std::mutex> lock(updateMutex);
updateParameters = std::move(params);
}
void MapRenderer::setObserver(std::shared_ptr<RendererObserver> _rendererObserver) {
// Lock as the initialization can come from the main thread or the GL thread first
std::lock_guard<std::mutex> lock(initialisationMutex);
rendererObserver = std::move(_rendererObserver);
// Set the new observer on the Renderer implementation
if (renderer) {
renderer->setObserver(rendererObserver.get());
}
}
void MapRenderer::requestSnapshot(SnapshotCallback callback) {
auto self = ActorRef<MapRenderer>(*this, mailbox);
self.invoke(
&MapRenderer::scheduleSnapshot,
std::make_unique<SnapshotCallback>([&, callback=std::move(callback), runloop=util::RunLoop::Get()](PremultipliedImage image) {
runloop->invoke([callback=std::move(callback), image=std::move(image)]() mutable {
callback(std::move(image));
});
snapshotCallback.reset();
})
);
}
// Called on OpenGL thread //
void MapRenderer::resetRenderer() {
assert (renderer);
renderer.reset();
}
void MapRenderer::scheduleSnapshot(std::unique_ptr<SnapshotCallback> callback) {
snapshotCallback = std::move(callback);
requestRender();
}
void MapRenderer::render(JNIEnv&) {
assert (renderer);
std::shared_ptr<UpdateParameters> params;
{
// Lock on the parameters
std::unique_lock<std::mutex> lock(updateMutex);
if (!updateParameters) return;
// Hold on to the update parameters during render
params = updateParameters;
}
// Activate the backend
BackendScope backendGuard { *backend };
// Ensure that the "current" scheduler on the render thread is
// this scheduler.
Scheduler::SetCurrent(this);
if (framebufferSizeChanged) {
backend->updateViewPort();
framebufferSizeChanged = false;
}
renderer->render(*params);
// Deliver the snapshot if requested
if (snapshotCallback) {
snapshotCallback->operator()(backend->readFramebuffer());
snapshotCallback.reset();
}
}
void MapRenderer::onSurfaceCreated(JNIEnv&) {
// Lock as the initialization can come from the main thread or the GL thread first
std::lock_guard<std::mutex> lock(initialisationMutex);
// The android system will have already destroyed the underlying
// GL resources if this is not the first initialization and an
// attempt to clean them up will fail
if (backend) backend->markContextLost();
if (renderer) renderer->markContextLost();
// Reset in opposite order
renderer.reset();
backend.reset();
// Create the new backend and renderer
backend = std::make_unique<AndroidRendererBackend>();
renderer = std::make_unique<Renderer>(*backend, pixelRatio, fileSource, *threadPool,
GLContextMode::Unique, programCacheDir, localIdeographFontFamily);
rendererRef = std::make_unique<ActorRef<Renderer>>(*renderer, mailbox);
// Set the observer on the new Renderer implementation
if (rendererObserver) {
renderer->setObserver(rendererObserver.get());
}
}
void MapRenderer::onSurfaceChanged(JNIEnv&, jint width, jint height) {
backend->resizeFramebuffer(width, height);
framebufferSizeChanged = true;
requestRender();
}
// Static methods //
jni::Class<MapRenderer> MapRenderer::javaClass;
void MapRenderer::registerNative(jni::JNIEnv& env) {
// Lookup the class
MapRenderer::javaClass = *jni::Class<MapRenderer>::Find(env).NewGlobalRef(env).release();
#define METHOD(MethodPtr, name) jni::MakeNativePeerMethod<decltype(MethodPtr), (MethodPtr)>(name)
// Register the peer
jni::RegisterNativePeer<MapRenderer>(env, MapRenderer::javaClass, "nativePtr",
std::make_unique<MapRenderer, JNIEnv&, jni::Object<MapRenderer>, jni::Object<FileSource>, jni::jfloat, jni::String, jni::String>,
"nativeInitialize", "finalize",
METHOD(&MapRenderer::render, "nativeRender"),
METHOD(&MapRenderer::onSurfaceCreated,
"nativeOnSurfaceCreated"),
METHOD(&MapRenderer::onSurfaceChanged,
"nativeOnSurfaceChanged"));
}
MapRenderer& MapRenderer::getNativePeer(JNIEnv& env, jni::Object<MapRenderer> jObject) {
static auto field = MapRenderer::javaClass.GetField<jlong>(env, "nativePtr");
MapRenderer* mapRenderer = reinterpret_cast<MapRenderer*>(jObject.Get(env, field));
assert(mapRenderer != nullptr);
return *mapRenderer;
}
} // namespace android
} // namespace mbgl
|
