1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "PointerIcon-JNI"
18
19 #include <nativehelper/JNIHelp.h>
20
21 #include "android_view_PointerIcon.h"
22
23 #include <android_runtime/AndroidRuntime.h>
24 #include <android_runtime/Log.h>
25 #include <utils/Log.h>
26 #include <android/graphics/bitmap.h>
27 #include <nativehelper/ScopedLocalRef.h>
28
29 #include "core_jni_helpers.h"
30
31 namespace android {
32
33 static struct {
34 jclass clazz;
35 jfieldID mType;
36 jfieldID mBitmap;
37 jfieldID mHotSpotX;
38 jfieldID mHotSpotY;
39 jfieldID mBitmapFrames;
40 jfieldID mDurationPerFrame;
41 jmethodID getSystemIcon;
42 jmethodID load;
43 } gPointerIconClassInfo;
44
45
46 // --- Global Functions ---
47
android_view_PointerIcon_getSystemIcon(JNIEnv * env,jobject contextObj,int32_t style)48 jobject android_view_PointerIcon_getSystemIcon(JNIEnv* env, jobject contextObj, int32_t style) {
49 jobject pointerIconObj = env->CallStaticObjectMethod(gPointerIconClassInfo.clazz,
50 gPointerIconClassInfo.getSystemIcon, contextObj, style);
51 if (env->ExceptionCheck()) {
52 ALOGW("An exception occurred while getting a pointer icon with style %d.", style);
53 LOGW_EX(env);
54 env->ExceptionClear();
55 return NULL;
56 }
57 return pointerIconObj;
58 }
59
android_view_PointerIcon_load(JNIEnv * env,jobject pointerIconObj,jobject contextObj,PointerIcon * outPointerIcon)60 status_t android_view_PointerIcon_load(JNIEnv* env, jobject pointerIconObj, jobject contextObj,
61 PointerIcon* outPointerIcon) {
62 outPointerIcon->reset();
63
64 if (!pointerIconObj) {
65 return OK;
66 }
67
68 ScopedLocalRef<jobject> loadedPointerIconObj(env, env->CallObjectMethod(pointerIconObj,
69 gPointerIconClassInfo.load, contextObj));
70 if (env->ExceptionCheck() || !loadedPointerIconObj.get()) {
71 ALOGW("An exception occurred while loading a pointer icon.");
72 LOGW_EX(env);
73 env->ExceptionClear();
74 return UNKNOWN_ERROR;
75 }
76 return android_view_PointerIcon_getLoadedIcon(env, loadedPointerIconObj.get(), outPointerIcon);
77 }
78
android_view_PointerIcon_getLoadedIcon(JNIEnv * env,jobject pointerIconObj,PointerIcon * outPointerIcon)79 status_t android_view_PointerIcon_getLoadedIcon(JNIEnv* env, jobject pointerIconObj,
80 PointerIcon* outPointerIcon) {
81 if (!pointerIconObj) {
82 return BAD_VALUE;
83 }
84 outPointerIcon->style = env->GetIntField(pointerIconObj, gPointerIconClassInfo.mType);
85 outPointerIcon->hotSpotX = env->GetFloatField(pointerIconObj, gPointerIconClassInfo.mHotSpotX);
86 outPointerIcon->hotSpotY = env->GetFloatField(pointerIconObj, gPointerIconClassInfo.mHotSpotY);
87
88 ScopedLocalRef<jobject> bitmapObj(
89 env, env->GetObjectField(pointerIconObj, gPointerIconClassInfo.mBitmap));
90 if (bitmapObj.get()) {
91 outPointerIcon->bitmap = graphics::Bitmap(env, bitmapObj.get());
92 }
93
94 ScopedLocalRef<jobjectArray> bitmapFramesObj(env, reinterpret_cast<jobjectArray>(
95 env->GetObjectField(pointerIconObj, gPointerIconClassInfo.mBitmapFrames)));
96 if (bitmapFramesObj.get()) {
97 outPointerIcon->durationPerFrame = env->GetIntField(
98 pointerIconObj, gPointerIconClassInfo.mDurationPerFrame);
99 jsize size = env->GetArrayLength(bitmapFramesObj.get());
100 outPointerIcon->bitmapFrames.resize(size);
101 for (jsize i = 0; i < size; ++i) {
102 ScopedLocalRef<jobject> bitmapObj(env, env->GetObjectArrayElement(bitmapFramesObj.get(), i));
103 outPointerIcon->bitmapFrames[i] = graphics::Bitmap(env, bitmapObj.get());
104 }
105 }
106
107 return OK;
108 }
109
android_view_PointerIcon_loadSystemIcon(JNIEnv * env,jobject contextObj,int32_t style,PointerIcon * outPointerIcon)110 status_t android_view_PointerIcon_loadSystemIcon(JNIEnv* env, jobject contextObj,
111 int32_t style, PointerIcon* outPointerIcon) {
112 jobject pointerIconObj = android_view_PointerIcon_getSystemIcon(env, contextObj, style);
113 if (!pointerIconObj) {
114 outPointerIcon->reset();
115 return UNKNOWN_ERROR;
116 }
117
118 status_t status = android_view_PointerIcon_load(env, pointerIconObj,
119 contextObj, outPointerIcon);
120 env->DeleteLocalRef(pointerIconObj);
121 return status;
122 }
123
124
125 // --- JNI Registration ---
126
register_android_view_PointerIcon(JNIEnv * env)127 int register_android_view_PointerIcon(JNIEnv* env) {
128 jclass clazz = FindClassOrDie(env, "android/view/PointerIcon");
129 gPointerIconClassInfo.clazz = MakeGlobalRefOrDie(env, clazz);
130
131 gPointerIconClassInfo.mBitmap = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
132 "mBitmap", "Landroid/graphics/Bitmap;");
133
134 gPointerIconClassInfo.mType = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
135 "mType", "I");
136
137 gPointerIconClassInfo.mHotSpotX = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
138 "mHotSpotX", "F");
139
140 gPointerIconClassInfo.mHotSpotY = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
141 "mHotSpotY", "F");
142
143 gPointerIconClassInfo.mBitmapFrames = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
144 "mBitmapFrames", "[Landroid/graphics/Bitmap;");
145
146 gPointerIconClassInfo.mDurationPerFrame = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
147 "mDurationPerFrame", "I");
148
149 gPointerIconClassInfo.getSystemIcon = GetStaticMethodIDOrDie(env, gPointerIconClassInfo.clazz,
150 "getSystemIcon", "(Landroid/content/Context;I)Landroid/view/PointerIcon;");
151
152 gPointerIconClassInfo.load = GetMethodIDOrDie(env, gPointerIconClassInfo.clazz,
153 "load", "(Landroid/content/Context;)Landroid/view/PointerIcon;");
154
155 return 0;
156 }
157
158 } // namespace android
159