1 // Copyright (C) 2024 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <cstdlib>
16 #include <memory>
17
18 #include <android_native_app_glue.h>
19 #include <assert.h>
20
21 #include "common.h"
22 #include "sample_base.h"
23
24 namespace cuttlefish {
25
26 struct AppState {
27 bool drawing = false;
28 std::unique_ptr<SampleBase> sample;
29 };
30
OnAppCmd(struct android_app * app,int32_t cmd)31 static void OnAppCmd(struct android_app* app, int32_t cmd) {
32 auto* state = reinterpret_cast<AppState*>(app->userData);
33
34 switch (cmd) {
35 case APP_CMD_START: {
36 ALOGD("APP_CMD_START");
37 if (app->window != nullptr) {
38 state->drawing = true;
39 VK_ASSERT(state->sample->SetWindow(app->window));
40 }
41 break;
42 }
43 case APP_CMD_INIT_WINDOW: {
44 ALOGD("APP_CMD_INIT_WINDOW");
45 if (app->window != nullptr) {
46 state->drawing = true;
47 VK_ASSERT(state->sample->SetWindow(app->window));
48 }
49 break;
50 }
51 case APP_CMD_TERM_WINDOW: {
52 ALOGD("APP_CMD_TERM_WINDOW");
53 state->drawing = false;
54 VK_ASSERT(state->sample->SetWindow(nullptr));
55 break;
56 }
57 case APP_CMD_DESTROY: {
58 ALOGD("APP_CMD_DESTROY");
59 state->drawing = false;
60 break;
61 }
62 default:
63 break;
64 }
65 }
66
Main(struct android_app * app)67 void Main(struct android_app* app) {
68 AppState state;
69 state.sample = VK_ASSERT(BuildVulkanSampleApp());
70
71 app->userData = &state;
72
73 // Invoked from the source->process() below:
74 app->onAppCmd = OnAppCmd;
75
76 while (true) {
77 int ident;
78 android_poll_source* source;
79 while ((ident = ALooper_pollOnce(state.drawing ? 0 : -1, nullptr, nullptr,
80 (void**)&source)) > ALOOPER_POLL_TIMEOUT) {
81 if (source != nullptr) {
82 source->process(app, source);
83 }
84 if (app->destroyRequested != 0) {
85 break;
86 }
87 }
88
89 if (app->destroyRequested != 0) {
90 ANativeActivity_finish(app->activity);
91 break;
92 }
93
94 if (state.drawing) {
95 VK_ASSERT(state.sample->Render());
96 }
97 }
98
99 state.sample->CleanUp();
100 state.sample.reset();
101 }
102
103 } // namespace cuttlefish
104
android_main(struct android_app * app)105 void android_main(struct android_app* app) { cuttlefish::Main(app); }
106