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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "PointerIcon-JNI"
#include "JNIHelp.h"
#include "android_view_PointerIcon.h"
#include <android_runtime/AndroidRuntime.h>
#include <utils/Log.h>
#include <android/graphics/GraphicsJNI.h>
namespace android {
static struct {
jclass clazz;
jfieldID mStyle;
jfieldID mBitmap;
jfieldID mHotSpotX;
jfieldID mHotSpotY;
jmethodID getSystemIcon;
jmethodID load;
} gPointerIconClassInfo;
// --- Global Functions ---
jobject android_view_PointerIcon_getSystemIcon(JNIEnv* env, jobject contextObj, int32_t style) {
jobject pointerIconObj = env->CallStaticObjectMethod(gPointerIconClassInfo.clazz,
gPointerIconClassInfo.getSystemIcon, contextObj, style);
if (env->ExceptionCheck()) {
ALOGW("An exception occurred while getting a pointer icon with style %d.", style);
LOGW_EX(env);
env->ExceptionClear();
return NULL;
}
return pointerIconObj;
}
status_t android_view_PointerIcon_load(JNIEnv* env, jobject pointerIconObj, jobject contextObj,
PointerIcon* outPointerIcon) {
outPointerIcon->reset();
if (!pointerIconObj) {
return OK;
}
jobject loadedPointerIconObj = env->CallObjectMethod(pointerIconObj,
gPointerIconClassInfo.load, contextObj);
if (env->ExceptionCheck() || !loadedPointerIconObj) {
ALOGW("An exception occurred while loading a pointer icon.");
LOGW_EX(env);
env->ExceptionClear();
return UNKNOWN_ERROR;
}
outPointerIcon->style = env->GetIntField(loadedPointerIconObj,
gPointerIconClassInfo.mStyle);
outPointerIcon->hotSpotX = env->GetFloatField(loadedPointerIconObj,
gPointerIconClassInfo.mHotSpotX);
outPointerIcon->hotSpotY = env->GetFloatField(loadedPointerIconObj,
gPointerIconClassInfo.mHotSpotY);
jobject bitmapObj = env->GetObjectField(loadedPointerIconObj, gPointerIconClassInfo.mBitmap);
if (bitmapObj) {
SkBitmap* bitmap = GraphicsJNI::getNativeBitmap(env, bitmapObj);
if (bitmap) {
outPointerIcon->bitmap = *bitmap; // use a shared pixel ref
}
env->DeleteLocalRef(bitmapObj);
}
env->DeleteLocalRef(loadedPointerIconObj);
return OK;
}
status_t android_view_PointerIcon_loadSystemIcon(JNIEnv* env, jobject contextObj,
int32_t style, PointerIcon* outPointerIcon) {
jobject pointerIconObj = android_view_PointerIcon_getSystemIcon(env, contextObj, style);
if (!pointerIconObj) {
outPointerIcon->reset();
return UNKNOWN_ERROR;
}
status_t status = android_view_PointerIcon_load(env, pointerIconObj,
contextObj, outPointerIcon);
env->DeleteLocalRef(pointerIconObj);
return status;
}
// --- JNI Registration ---
#define FIND_CLASS(var, className) \
var = env->FindClass(className); \
LOG_FATAL_IF(! var, "Unable to find class " className); \
var = jclass(env->NewGlobalRef(var));
#define GET_STATIC_METHOD_ID(var, clazz, methodName, methodDescriptor) \
var = env->GetStaticMethodID(clazz, methodName, methodDescriptor); \
LOG_FATAL_IF(! var, "Unable to find method " methodName);
#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
var = env->GetMethodID(clazz, methodName, methodDescriptor); \
LOG_FATAL_IF(! var, "Unable to find method " methodName);
#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
LOG_FATAL_IF(! var, "Unable to find field " fieldName);
int register_android_view_PointerIcon(JNIEnv* env) {
FIND_CLASS(gPointerIconClassInfo.clazz, "android/view/PointerIcon");
GET_FIELD_ID(gPointerIconClassInfo.mBitmap, gPointerIconClassInfo.clazz,
"mBitmap", "Landroid/graphics/Bitmap;");
GET_FIELD_ID(gPointerIconClassInfo.mStyle, gPointerIconClassInfo.clazz,
"mStyle", "I");
GET_FIELD_ID(gPointerIconClassInfo.mHotSpotX, gPointerIconClassInfo.clazz,
"mHotSpotX", "F");
GET_FIELD_ID(gPointerIconClassInfo.mHotSpotY, gPointerIconClassInfo.clazz,
"mHotSpotY", "F");
GET_STATIC_METHOD_ID(gPointerIconClassInfo.getSystemIcon, gPointerIconClassInfo.clazz,
"getSystemIcon", "(Landroid/content/Context;I)Landroid/view/PointerIcon;");
GET_METHOD_ID(gPointerIconClassInfo.load, gPointerIconClassInfo.clazz,
"load", "(Landroid/content/Context;)Landroid/view/PointerIcon;");
return 0;
}
} // namespace android
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