com_android_internal_graphics_NativeUtils.cpp revision 9066cfe9886ac131c34d59ed0e2d287b0e3c0087 
1/*
2 * Copyright (C) 2007 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 "AWT"
18
19#include "jni.h"
20#include "JNIHelp.h"
21#include "GraphicsJNI.h"
22#include <android_runtime/AndroidRuntime.h>
23
24#include "SkCanvas.h"
25#include "SkDevice.h"
26#include "SkPicture.h"
27#include "SkTemplates.h"
28
29namespace android
30{
31
32static jclass class_fileDescriptor;
33static jfieldID field_fileDescriptor_descriptor;
34static jmethodID method_fileDescriptor_init;
35
36
37static jboolean scrollRect(JNIEnv* env, jobject graphics2D, jobject canvas, jobject rect, int dx, int dy) {
38    if (canvas == NULL) {
39        jniThrowException(env, "java/lang/NullPointerException", NULL);
40        return false;
41    }
42
43    SkIRect src, *srcPtr = NULL;
44    if (NULL != rect) {
45        GraphicsJNI::jrect_to_irect(env, rect, &src);
46        srcPtr = &src;
47    }
48    SkCanvas* c = GraphicsJNI::getNativeCanvas(env, canvas);
49    const SkBitmap& bitmap = c->getDevice()->accessBitmap(true);
50    return bitmap.scrollRect(srcPtr, dx, dy, NULL);
51}
52
53static JNINativeMethod method_table[] = {
54    { "nativeScrollRect",
55      "(Landroid/graphics/Canvas;Landroid/graphics/Rect;II)Z",
56      (void*)scrollRect}
57};
58
59int register_com_android_internal_graphics_NativeUtils(JNIEnv *env) {
60    return AndroidRuntime::registerNativeMethods(
61        env, "com/android/internal/graphics/NativeUtils",
62        method_table, NELEM(method_table));
63}
64
65}
66