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 "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/GraphicsJNI.h>
27
28 namespace android {
29
30 static struct {
31 jclass clazz;
32 jfieldID mStyle;
33 jfieldID mBitmap;
34 jfieldID mHotSpotX;
35 jfieldID mHotSpotY;
36 jmethodID getSystemIcon;
37 jmethodID load;
38 } gPointerIconClassInfo;
39
40
41 // --- Global Functions ---
42
android_view_PointerIcon_getSystemIcon(JNIEnv * env,jobject contextObj,int32_t style)43 jobject android_view_PointerIcon_getSystemIcon(JNIEnv* env, jobject contextObj, int32_t style) {
44 jobject pointerIconObj = env->CallStaticObjectMethod(gPointerIconClassInfo.clazz,
45 gPointerIconClassInfo.getSystemIcon, contextObj, style);
46 if (env->ExceptionCheck()) {
47 ALOGW("An exception occurred while getting a pointer icon with style %d.", style);
48 LOGW_EX(env);
49 env->ExceptionClear();
50 return NULL;
51 }
52 return pointerIconObj;
53 }
54
android_view_PointerIcon_load(JNIEnv * env,jobject pointerIconObj,jobject contextObj,PointerIcon * outPointerIcon)55 status_t android_view_PointerIcon_load(JNIEnv* env, jobject pointerIconObj, jobject contextObj,
56 PointerIcon* outPointerIcon) {
57 outPointerIcon->reset();
58
59 if (!pointerIconObj) {
60 return OK;
61 }
62
63 jobject loadedPointerIconObj = env->CallObjectMethod(pointerIconObj,
64 gPointerIconClassInfo.load, contextObj);
65 if (env->ExceptionCheck() || !loadedPointerIconObj) {
66 ALOGW("An exception occurred while loading a pointer icon.");
67 LOGW_EX(env);
68 env->ExceptionClear();
69 return UNKNOWN_ERROR;
70 }
71
72 outPointerIcon->style = env->GetIntField(loadedPointerIconObj,
73 gPointerIconClassInfo.mStyle);
74 outPointerIcon->hotSpotX = env->GetFloatField(loadedPointerIconObj,
75 gPointerIconClassInfo.mHotSpotX);
76 outPointerIcon->hotSpotY = env->GetFloatField(loadedPointerIconObj,
77 gPointerIconClassInfo.mHotSpotY);
78
79 jobject bitmapObj = env->GetObjectField(loadedPointerIconObj, gPointerIconClassInfo.mBitmap);
80 if (bitmapObj) {
81 SkBitmap* bitmap = GraphicsJNI::getNativeBitmap(env, bitmapObj);
82 if (bitmap) {
83 outPointerIcon->bitmap = *bitmap; // use a shared pixel ref
84 }
85 env->DeleteLocalRef(bitmapObj);
86 }
87
88 env->DeleteLocalRef(loadedPointerIconObj);
89 return OK;
90 }
91
android_view_PointerIcon_loadSystemIcon(JNIEnv * env,jobject contextObj,int32_t style,PointerIcon * outPointerIcon)92 status_t android_view_PointerIcon_loadSystemIcon(JNIEnv* env, jobject contextObj,
93 int32_t style, PointerIcon* outPointerIcon) {
94 jobject pointerIconObj = android_view_PointerIcon_getSystemIcon(env, contextObj, style);
95 if (!pointerIconObj) {
96 outPointerIcon->reset();
97 return UNKNOWN_ERROR;
98 }
99
100 status_t status = android_view_PointerIcon_load(env, pointerIconObj,
101 contextObj, outPointerIcon);
102 env->DeleteLocalRef(pointerIconObj);
103 return status;
104 }
105
106
107 // --- JNI Registration ---
108
109 #define FIND_CLASS(var, className) \
110 var = env->FindClass(className); \
111 LOG_FATAL_IF(! var, "Unable to find class " className); \
112 var = jclass(env->NewGlobalRef(var));
113
114 #define GET_STATIC_METHOD_ID(var, clazz, methodName, methodDescriptor) \
115 var = env->GetStaticMethodID(clazz, methodName, methodDescriptor); \
116 LOG_FATAL_IF(! var, "Unable to find method " methodName);
117
118 #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
119 var = env->GetMethodID(clazz, methodName, methodDescriptor); \
120 LOG_FATAL_IF(! var, "Unable to find method " methodName);
121
122 #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
123 var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
124 LOG_FATAL_IF(! var, "Unable to find field " fieldName);
125
register_android_view_PointerIcon(JNIEnv * env)126 int register_android_view_PointerIcon(JNIEnv* env) {
127 FIND_CLASS(gPointerIconClassInfo.clazz, "android/view/PointerIcon");
128
129 GET_FIELD_ID(gPointerIconClassInfo.mBitmap, gPointerIconClassInfo.clazz,
130 "mBitmap", "Landroid/graphics/Bitmap;");
131
132 GET_FIELD_ID(gPointerIconClassInfo.mStyle, gPointerIconClassInfo.clazz,
133 "mStyle", "I");
134
135 GET_FIELD_ID(gPointerIconClassInfo.mHotSpotX, gPointerIconClassInfo.clazz,
136 "mHotSpotX", "F");
137
138 GET_FIELD_ID(gPointerIconClassInfo.mHotSpotY, gPointerIconClassInfo.clazz,
139 "mHotSpotY", "F");
140
141 GET_STATIC_METHOD_ID(gPointerIconClassInfo.getSystemIcon, gPointerIconClassInfo.clazz,
142 "getSystemIcon", "(Landroid/content/Context;I)Landroid/view/PointerIcon;");
143
144 GET_METHOD_ID(gPointerIconClassInfo.load, gPointerIconClassInfo.clazz,
145 "load", "(Landroid/content/Context;)Landroid/view/PointerIcon;");
146
147 return 0;
148 }
149
150 } // namespace android
151