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Issue 165483003: Gamepad API for Android (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: fix forgotten things Created 6 years, 9 months ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "content/browser/gamepad/gamepad_platform_data_fetcher_android.h"
6
7 #include "base/android/jni_array.h"
8 #include "base/android/jni_string.h"
9 #include "base/debug/trace_event.h"
10 #include "base/strings/string16.h"
11 #include "jni/GamepadAdapter_jni.h"
12 #include "third_party/WebKit/public/platform/WebGamepad.h"
13
14 using base::android::AttachCurrentThread;
15 using base::string16;
16 using blink::WebGamepad;
17 using blink::WebGamepads;
18
19 namespace content {
20
21 namespace {
22
23 template <size_t array_length>
24 void CopyJavaStringToWebUCharArray(
25 JNIEnv* env, jstring src, blink::WebUChar* array) {
26 COMPILE_ASSERT(sizeof(string16::value_type) == sizeof(blink::WebUChar),
27 string16_and_WebUChar_are_same_size);
28 string16 data;
29 base::android::ConvertJavaStringToUTF16(env, src, &data);
30 COMPILE_ASSERT(array_length > 0, array_length_at_least_1);
31 const size_t characters_to_copy = std::min(data.size(), array_length - 1);
32 memcpy(array, data.data(), characters_to_copy * sizeof(string16::value_type));
33 array[characters_to_copy] = 0;
34 }
35
36 }
37
38 GamepadPlatformDataFetcherAndroid::GamepadPlatformDataFetcherAndroid() {
39 Java_GamepadAdapter_setDataRequested(
40 AttachCurrentThread(), reinterpret_cast<intptr_t>(this), true);
41 }
42
43 GamepadPlatformDataFetcherAndroid::~GamepadPlatformDataFetcherAndroid() {
44 }
45
46 void GamepadPlatformDataFetcherAndroid::GetGamepadData(
47 blink::WebGamepads* pads,
48 bool devices_changed_hint) {
49 TRACE_EVENT0("GAMEPAD", "GetGamepadData");
50 data_ = pads;
51 data_->length = WebGamepads::itemsLengthCap;
52 Java_GamepadAdapter_getGamepadData(AttachCurrentThread());
53 data_ = NULL;
54 }
55
56 void GamepadPlatformDataFetcherAndroid::PauseHint(bool paused) {
57 Java_GamepadAdapter_setDataRequested(
58 AttachCurrentThread(), reinterpret_cast<intptr_t>(this), !paused);
59 }
60
61 void GamepadPlatformDataFetcherAndroid::RefreshDevice(
62 JNIEnv* env,
63 jobject obj,
64 int index,
65 bool connected,
66 jstring id,
67 jstring mapping,
68 long timestamp,
69 jfloatArray axes,
70 jfloatArray buttons) {
71 CHECK(data_);
72 WebGamepad& pad = data_->items[index];
73 pad.connected = connected;
74 if (!connected)
75 return;
76
77 CopyJavaStringToWebUCharArray<WebGamepad::idLengthCap>(env, id, pad.id);
78 CopyJavaStringToWebUCharArray<WebGamepad::mappingLengthCap>(
79 env, mapping, pad.mapping);
80
81 pad.timestamp = timestamp;
82
83 std::vector<float> axes_data;
84 base::android::JavaFloatArrayToFloatVector(env, axes, &axes_data);
85 pad.axesLength = std::min(axes_data.size(), WebGamepad::axesLengthCap);
86 memcpy(pad.axes, axes_data.begin(), pad.axesLength * sizeof(float));
87
88 std::vector<float> buttons_data;
89 base::android::JavaFloatArrayToFloatVector(env, buttons, &buttons_data);
90 pad.buttonsLength =
91 std::min(buttons_data.size(), WebGamepad::buttonsLengthCap);
92 for (unsigned i = 0; i < pad.buttonsLength; ++i) {
93 float value = buttons_data[i];
94 pad.buttons[i].pressed = value;
95 pad.buttons[i].value = value;
96 }
97 }
98
99 bool GamepadPlatformDataFetcherAndroid::RegisterGamepadAdapter(JNIEnv* env) {
100 return RegisterNativesImpl(env);
101 }
102
103 }
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