android_view_PointerIcon.cpp revision 987f79f60bb1f0a4bcd3ef22e57301c743f0b94f
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#include "core_jni_helpers.h" 29 30namespace android { 31 32static struct { 33 jclass clazz; 34 jfieldID mStyle; 35 jfieldID mBitmap; 36 jfieldID mHotSpotX; 37 jfieldID mHotSpotY; 38 jmethodID getSystemIcon; 39 jmethodID load; 40} gPointerIconClassInfo; 41 42 43// --- Global Functions --- 44 45jobject android_view_PointerIcon_getSystemIcon(JNIEnv* env, jobject contextObj, int32_t style) { 46 jobject pointerIconObj = env->CallStaticObjectMethod(gPointerIconClassInfo.clazz, 47 gPointerIconClassInfo.getSystemIcon, contextObj, style); 48 if (env->ExceptionCheck()) { 49 ALOGW("An exception occurred while getting a pointer icon with style %d.", style); 50 LOGW_EX(env); 51 env->ExceptionClear(); 52 return NULL; 53 } 54 return pointerIconObj; 55} 56 57status_t android_view_PointerIcon_load(JNIEnv* env, jobject pointerIconObj, jobject contextObj, 58 PointerIcon* outPointerIcon) { 59 outPointerIcon->reset(); 60 61 if (!pointerIconObj) { 62 return OK; 63 } 64 65 jobject loadedPointerIconObj = env->CallObjectMethod(pointerIconObj, 66 gPointerIconClassInfo.load, contextObj); 67 if (env->ExceptionCheck() || !loadedPointerIconObj) { 68 ALOGW("An exception occurred while loading a pointer icon."); 69 LOGW_EX(env); 70 env->ExceptionClear(); 71 return UNKNOWN_ERROR; 72 } 73 74 outPointerIcon->style = env->GetIntField(loadedPointerIconObj, 75 gPointerIconClassInfo.mStyle); 76 outPointerIcon->hotSpotX = env->GetFloatField(loadedPointerIconObj, 77 gPointerIconClassInfo.mHotSpotX); 78 outPointerIcon->hotSpotY = env->GetFloatField(loadedPointerIconObj, 79 gPointerIconClassInfo.mHotSpotY); 80 81 jobject bitmapObj = env->GetObjectField(loadedPointerIconObj, gPointerIconClassInfo.mBitmap); 82 if (bitmapObj) { 83 SkBitmap* bitmap = GraphicsJNI::getNativeBitmap(env, bitmapObj); 84 if (bitmap) { 85 outPointerIcon->bitmap = *bitmap; // use a shared pixel ref 86 } 87 env->DeleteLocalRef(bitmapObj); 88 } 89 90 env->DeleteLocalRef(loadedPointerIconObj); 91 return OK; 92} 93 94status_t android_view_PointerIcon_loadSystemIcon(JNIEnv* env, jobject contextObj, 95 int32_t style, PointerIcon* outPointerIcon) { 96 jobject pointerIconObj = android_view_PointerIcon_getSystemIcon(env, contextObj, style); 97 if (!pointerIconObj) { 98 outPointerIcon->reset(); 99 return UNKNOWN_ERROR; 100 } 101 102 status_t status = android_view_PointerIcon_load(env, pointerIconObj, 103 contextObj, outPointerIcon); 104 env->DeleteLocalRef(pointerIconObj); 105 return status; 106} 107 108 109// --- JNI Registration --- 110 111int register_android_view_PointerIcon(JNIEnv* env) { 112 jclass clazz = FindClassOrDie(env, "android/view/PointerIcon"); 113 gPointerIconClassInfo.clazz = MakeGlobalRefOrDie(env, clazz); 114 115 gPointerIconClassInfo.mBitmap = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz, 116 "mBitmap", "Landroid/graphics/Bitmap;"); 117 118 gPointerIconClassInfo.mStyle = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz, 119 "mStyle", "I"); 120 121 gPointerIconClassInfo.mHotSpotX = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz, 122 "mHotSpotX", "F"); 123 124 gPointerIconClassInfo.mHotSpotY = GetFieldIDOrDie(env, gPointerIconClassInfo.clazz, 125 "mHotSpotY", "F"); 126 127 gPointerIconClassInfo.getSystemIcon = GetStaticMethodIDOrDie(env, gPointerIconClassInfo.clazz, 128 "getSystemIcon", "(Landroid/content/Context;I)Landroid/view/PointerIcon;"); 129 130 gPointerIconClassInfo.load = GetMethodIDOrDie(env, gPointerIconClassInfo.clazz, 131 "load", "(Landroid/content/Context;)Landroid/view/PointerIcon;"); 132 133 return 0; 134} 135 136} // namespace android 137