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/GraphicsJNI.h>
27#include <nativehelper/ScopedLocalRef.h>
28
29#include "core_jni_helpers.h"
30
31namespace android {
32
33static 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
48jobject 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
60status_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
79status_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        GraphicsJNI::getSkBitmap(env, bitmapObj.get(), &(outPointerIcon->bitmap));
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            GraphicsJNI::getSkBitmap(env, bitmapObj.get(), &(outPointerIcon->bitmapFrames[i]));
104        }
105    }
106
107    return OK;
108}
109
110status_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
127int 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