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 #ifndef _ANDROID_GRAPHICS_NINE_PATCH_PEEKER_H_
18 #define _ANDROID_GRAPHICS_NINE_PATCH_PEEKER_H_
19 
20 #include "SkPngChunkReader.h"
21 #include <androidfw/ResourceTypes.h>
22 
23 #include <jni.h>
24 
25 using namespace android;
26 
27 class NinePatchPeeker : public SkPngChunkReader {
28 public:
NinePatchPeeker()29     NinePatchPeeker()
30             : mPatch(NULL)
31             , mPatchSize(0)
32             , mHasInsets(false)
33             , mOutlineRadius(0)
34             , mOutlineAlpha(0) {
35         memset(mOpticalInsets, 0, 4 * sizeof(int32_t));
36         memset(mOutlineInsets, 0, 4 * sizeof(int32_t));
37     }
38 
~NinePatchPeeker()39     ~NinePatchPeeker() {
40         free(mPatch);
41     }
42 
43     bool readChunk(const char tag[], const void* data, size_t length) override;
44 
45     jobject createNinePatchInsets(JNIEnv*, float scale) const;
46     void getPadding(JNIEnv*, jobject outPadding) const;
47     void scale(float scaleX, float scaleY, int scaledWidth, int scaledHeight);
48 
49     Res_png_9patch* mPatch;
50     size_t mPatchSize;
51     bool mHasInsets;
52 private:
53     int32_t mOpticalInsets[4];
54     int32_t mOutlineInsets[4];
55     float mOutlineRadius;
56     uint8_t mOutlineAlpha;
57 };
58 
59 #endif  // _ANDROID_GRAPHICS_NINE_PATCH_PEEKER_H_
60