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#include "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    outPointerIcon->style = env->GetIntField(pointerIconObj, gPointerIconClassInfo.mType);
82    outPointerIcon->hotSpotX = env->GetFloatField(pointerIconObj, gPointerIconClassInfo.mHotSpotX);
83    outPointerIcon->hotSpotY = env->GetFloatField(pointerIconObj, gPointerIconClassInfo.mHotSpotY);
84
85    ScopedLocalRef<jobject> bitmapObj(
86            env, env->GetObjectField(pointerIconObj, gPointerIconClassInfo.mBitmap));
87    if (bitmapObj.get()) {
88        GraphicsJNI::getSkBitmap(env, bitmapObj.get(), &(outPointerIcon->bitmap));
89    }
90
91    ScopedLocalRef<jobjectArray> bitmapFramesObj(env, reinterpret_cast<jobjectArray>(
92            env->GetObjectField(pointerIconObj, gPointerIconClassInfo.mBitmapFrames)));
93    if (bitmapFramesObj.get()) {
94        outPointerIcon->durationPerFrame = env->GetIntField(
95                pointerIconObj, gPointerIconClassInfo.mDurationPerFrame);
96        jsize size = env->GetArrayLength(bitmapFramesObj.get());
97        outPointerIcon->bitmapFrames.resize(size);
98        for (jsize i = 0; i < size; ++i) {
99            ScopedLocalRef<jobject> bitmapObj(env, env->GetObjectArrayElement(bitmapFramesObj.get(), i));
100            GraphicsJNI::getSkBitmap(env, bitmapObj.get(), &(outPointerIcon->bitmapFrames[i]));
101        }
102    }
103
104    return OK;
105}
106
107status_t android_view_PointerIcon_loadSystemIcon(JNIEnv* env, jobject contextObj,
108        int32_t style, PointerIcon* outPointerIcon) {
109    jobject pointerIconObj = android_view_PointerIcon_getSystemIcon(env, contextObj, style);
110    if (!pointerIconObj) {
111        outPointerIcon->reset();
112        return UNKNOWN_ERROR;
113    }
114
115    status_t status = android_view_PointerIcon_load(env, pointerIconObj,
116            contextObj, outPointerIcon);
117    env->DeleteLocalRef(pointerIconObj);
118    return status;
119}
120
121
122// --- JNI Registration ---
123
124int register_android_view_PointerIcon(JNIEnv* env) {
125    jclass clazz = FindClassOrDie(env, "android/view/PointerIcon");
126    gPointerIconClassInfo.clazz = MakeGlobalRefOrDie(env, clazz);
127
128    gPointerIconClassInfo.mBitmap = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
129            "mBitmap", "Landroid/graphics/Bitmap;");
130
131    gPointerIconClassInfo.mType = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
132            "mType", "I");
133
134    gPointerIconClassInfo.mHotSpotX = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
135            "mHotSpotX", "F");
136
137    gPointerIconClassInfo.mHotSpotY = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
138            "mHotSpotY", "F");
139
140    gPointerIconClassInfo.mBitmapFrames = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
141            "mBitmapFrames", "[Landroid/graphics/Bitmap;");
142
143    gPointerIconClassInfo.mDurationPerFrame = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz,
144            "mDurationPerFrame", "I");
145
146    gPointerIconClassInfo.getSystemIcon = GetStaticMethodIDOrDie(env, gPointerIconClassInfo.clazz,
147            "getSystemIcon", "(Landroid/content/Context;I)Landroid/view/PointerIcon;");
148
149    gPointerIconClassInfo.load = GetMethodIDOrDie(env, gPointerIconClassInfo.clazz,
150            "load", "(Landroid/content/Context;)Landroid/view/PointerIcon;");
151
152    return 0;
153}
154
155} // namespace android
156