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
22 using namespace android;
23
readChunk(const char tag[],const void * data,size_t length)24 bool 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