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#include "NinePatchPeeker.h"
18
19#include "SkBitmap.h"
20#include "SkImageDecoder.h"
21
22using namespace android;
23
24bool NinePatchPeeker::readChunk(const char tag[], const void* data, size_t length) {
25    if (!strcmp("npTc", tag) && length >= sizeof(Res_png_9patch)) {
26        Res_png_9patch* patch = (Res_png_9patch*) data;
27        size_t patchSize = patch->serializedSize();
28        if (length != patchSize) {
29            return false;
30        }
31        // You have to copy the data because it is owned by the png reader
32        Res_png_9patch* patchNew = (Res_png_9patch*) malloc(patchSize);
33        memcpy(patchNew, patch, patchSize);
34        Res_png_9patch::deserialize(patchNew);
35        patchNew->fileToDevice();
36        free(mPatch);
37        mPatch = patchNew;
38        mPatchSize = patchSize;
39    } else if (!strcmp("npLb", tag) && length == sizeof(int32_t) * 4) {
40        mHasInsets = true;
41        memcpy(&mOpticalInsets, data, sizeof(int32_t) * 4);
42    } else if (!strcmp("npOl", tag) && length == 24) { // 4 int32_ts, 1 float, 1 int32_t sized byte
43        mHasInsets = true;
44        memcpy(&mOutlineInsets, data, sizeof(int32_t) * 4);
45        mOutlineRadius = ((const float*)data)[4];
46        mOutlineAlpha = ((const int32_t*)data)[5] & 0xff;
47    }
48    return true;    // keep on decoding
49}
50