1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/*
**
** Copyright 2006, 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.
*/
#undef LOG_TAG
#define LOG_TAG "9patch"
#define LOG_NDEBUG 1
#include <androidfw/ResourceTypes.h>
#include <hwui/Canvas.h>
#include <hwui/Paint.h>
#include <utils/Log.h>
#include "SkCanvas.h"
#include "SkLatticeIter.h"
#include "SkRegion.h"
#include "GraphicsJNI.h"
#include "NinePatchPeeker.h"
#include "NinePatchUtils.h"
jclass gInsetStruct_class;
jmethodID gInsetStruct_constructorMethodID;
using namespace android;
/**
* IMPORTANT NOTE: 9patch chunks can be manipuated either as an array of bytes
* or as a Res_png_9patch instance. It is important to note that the size of the
* array required to hold a 9patch chunk is greater than sizeof(Res_png_9patch).
* The code below manipulates chunks as Res_png_9patch* types to draw and as
* int8_t* to allocate and free the backing storage.
*/
class SkNinePatchGlue {
public:
static jboolean isNinePatchChunk(JNIEnv* env, jobject, jbyteArray obj) {
if (NULL == obj) {
return JNI_FALSE;
}
if (env->GetArrayLength(obj) < (int)sizeof(Res_png_9patch)) {
return JNI_FALSE;
}
const jbyte* array = env->GetByteArrayElements(obj, 0);
if (array != NULL) {
const Res_png_9patch* chunk = reinterpret_cast<const Res_png_9patch*>(array);
int8_t wasDeserialized = chunk->wasDeserialized;
env->ReleaseByteArrayElements(obj, const_cast<jbyte*>(array), JNI_ABORT);
return (wasDeserialized != -1) ? JNI_TRUE : JNI_FALSE;
}
return JNI_FALSE;
}
static jlong validateNinePatchChunk(JNIEnv* env, jobject, jbyteArray obj) {
size_t chunkSize = obj != NULL ? env->GetArrayLength(obj) : 0;
if (chunkSize < (int) (sizeof(Res_png_9patch))) {
jniThrowRuntimeException(env, "Array too small for chunk.");
return 0;
}
int8_t* storage = new int8_t[chunkSize];
// This call copies the content of the jbyteArray
env->GetByteArrayRegion(obj, 0, chunkSize, reinterpret_cast<jbyte*>(storage));
// Deserialize in place, return the array we just allocated
return reinterpret_cast<jlong>(Res_png_9patch::deserialize(storage));
}
static void finalize(JNIEnv* env, jobject, jlong patchHandle) {
int8_t* patch = reinterpret_cast<int8_t*>(patchHandle);
delete[] patch;
}
static jlong getTransparentRegion(JNIEnv* env, jobject, jlong bitmapPtr,
jlong chunkHandle, jobject dstRect) {
Res_png_9patch* chunk = reinterpret_cast<Res_png_9patch*>(chunkHandle);
SkASSERT(chunk);
SkBitmap bitmap;
bitmap::toBitmap(bitmapPtr).getSkBitmap(&bitmap);
SkRect dst;
GraphicsJNI::jrect_to_rect(env, dstRect, &dst);
SkCanvas::Lattice lattice;
SkIRect src = SkIRect::MakeWH(bitmap.width(), bitmap.height());
lattice.fBounds = &src;
NinePatchUtils::SetLatticeDivs(&lattice, *chunk, bitmap.width(), bitmap.height());
lattice.fRectTypes = nullptr;
lattice.fColors = nullptr;
SkRegion* region = nullptr;
if (SkLatticeIter::Valid(bitmap.width(), bitmap.height(), lattice)) {
SkLatticeIter iter(lattice, dst);
if (iter.numRectsToDraw() == chunk->numColors) {
SkRect dummy;
SkRect iterDst;
int index = 0;
while (iter.next(&dummy, &iterDst)) {
if (0 == chunk->getColors()[index++] && !iterDst.isEmpty()) {
if (!region) {
region = new SkRegion();
}
region->op(iterDst.round(), SkRegion::kUnion_Op);
}
}
}
}
return reinterpret_cast<jlong>(region);
}
};
jobject NinePatchPeeker::createNinePatchInsets(JNIEnv* env, float scale) const {
if (!mHasInsets) {
return nullptr;
}
return env->NewObject(gInsetStruct_class, gInsetStruct_constructorMethodID,
mOpticalInsets[0], mOpticalInsets[1],
mOpticalInsets[2], mOpticalInsets[3],
mOutlineInsets[0], mOutlineInsets[1],
mOutlineInsets[2], mOutlineInsets[3],
mOutlineRadius, mOutlineAlpha, scale);
}
void NinePatchPeeker::getPadding(JNIEnv* env, jobject outPadding) const {
if (mPatch) {
GraphicsJNI::set_jrect(env, outPadding,
mPatch->paddingLeft, mPatch->paddingTop,
mPatch->paddingRight, mPatch->paddingBottom);
} else {
GraphicsJNI::set_jrect(env, outPadding, -1, -1, -1, -1);
}
}
/////////////////////////////////////////////////////////////////////////////////////////
static const JNINativeMethod gNinePatchMethods[] = {
{ "isNinePatchChunk", "([B)Z", (void*) SkNinePatchGlue::isNinePatchChunk },
{ "validateNinePatchChunk", "([B)J",
(void*) SkNinePatchGlue::validateNinePatchChunk },
{ "nativeFinalize", "(J)V", (void*) SkNinePatchGlue::finalize },
{ "nativeGetTransparentRegion", "(JJLandroid/graphics/Rect;)J",
(void*) SkNinePatchGlue::getTransparentRegion }
};
int register_android_graphics_NinePatch(JNIEnv* env) {
gInsetStruct_class = MakeGlobalRefOrDie(env, FindClassOrDie(env,
"android/graphics/NinePatch$InsetStruct"));
gInsetStruct_constructorMethodID = GetMethodIDOrDie(env, gInsetStruct_class, "<init>",
"(IIIIIIIIFIF)V");
return android::RegisterMethodsOrDie(env,
"android/graphics/NinePatch", gNinePatchMethods, NELEM(gNinePatchMethods));
}
|
