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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
|
/*
* Copyright (C) 2009, 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef V8ArrayBufferViewCustom_h
#define V8ArrayBufferViewCustom_h
#include <wtf/ArrayBuffer.h>
#include "ExceptionCode.h"
#include "V8ArrayBuffer.h"
#include "V8ArrayBufferCustom.h"
#include "V8Binding.h"
#include "V8Proxy.h"
namespace WebCore {
static const char* tooLargeSize = "Size is too large (or is negative).";
static const char* outOfRangeLengthAndOffset = "Index is out of range.";
// Copy the elements from the source array to the typed destination array.
// Returns true if it succeeded, otherwise returns false.
bool copyElements(v8::Handle<v8::Object> destArray, v8::Handle<v8::Object> srcArray, uint32_t length, uint32_t offset, v8::Isolate*);
template<class ArrayClass>
v8::Handle<v8::Value> wrapArrayBufferView(const v8::Arguments& args, WrapperTypeInfo* type, ArrayClass array, v8::ExternalArrayType arrayType, bool hasIndexer)
{
// Transform the holder into a wrapper object for the array.
V8DOMWrapper::setDOMWrapper(args.Holder(), type, array.get());
if (hasIndexer)
args.Holder()->SetIndexedPropertiesToExternalArrayData(array.get()->baseAddress(), arrayType, array.get()->length());
v8::Handle<v8::Object> wrapper = args.Holder();
v8::Persistent<v8::Object> wrapperHandle = V8DOMWrapper::setJSWrapperForDOMObject(array.release(), wrapper);
wrapperHandle.MarkIndependent();
return wrapper;
}
// Template function used by the ArrayBufferView*Constructor callbacks.
template<class ArrayClass, class ElementType>
v8::Handle<v8::Value> constructWebGLArrayWithArrayBufferArgument(const v8::Arguments& args, WrapperTypeInfo* type, v8::ExternalArrayType arrayType, bool hasIndexer)
{
ArrayBuffer* buf = V8ArrayBuffer::toNative(args[0]->ToObject());
if (!buf)
return throwTypeError("Could not convert argument 0 to a ArrayBuffer", args.GetIsolate());
bool ok;
uint32_t offset = 0;
int argLen = args.Length();
if (argLen > 1) {
offset = toUInt32(args[1], ok);
if (!ok)
return throwTypeError("Could not convert argument 1 to a number", args.GetIsolate());
}
uint32_t length = 0;
if (argLen > 2) {
length = toUInt32(args[2], ok);
if (!ok)
return throwTypeError("Could not convert argument 2 to a number", args.GetIsolate());
} else {
if ((buf->byteLength() - offset) % sizeof(ElementType))
return throwError(RangeError, "ArrayBuffer length minus the byteOffset is not a multiple of the element size.", args.GetIsolate());
length = (buf->byteLength() - offset) / sizeof(ElementType);
}
RefPtr<ArrayClass> array = ArrayClass::create(buf, offset, length);
if (!array)
return throwError(RangeError, tooLargeSize, args.GetIsolate());
return wrapArrayBufferView(args, type, array, arrayType, hasIndexer);
}
// Template function used by the ArrayBufferView*Constructor callbacks.
template<class ArrayClass, class JavaScriptWrapperArrayType, class ElementType>
v8::Handle<v8::Value> constructWebGLArray(const v8::Arguments& args, WrapperTypeInfo* type, v8::ExternalArrayType arrayType)
{
if (!args.IsConstructCall())
return throwTypeError("DOM object constructor cannot be called as a function.", args.GetIsolate());
if (ConstructorMode::current() == ConstructorMode::WrapExistingObject)
return args.Holder();
int argLen = args.Length();
if (!argLen) {
// This happens when we return a previously constructed
// ArrayBufferView, e.g. from the call to <Type>Array.subset().
// The V8DOMWrapper will set the internal pointer in the
// created object. Unfortunately it doesn't look like it's
// possible to distinguish between this case and that where
// the user calls "new <Type>Array()" from JavaScript. We must
// construct an empty view to avoid crashes when fetching the
// length.
RefPtr<ArrayClass> array = ArrayClass::create(0);
// Do not call SetIndexedPropertiesToExternalArrayData on this
// object. Not only is there no point from a performance
// perspective, but doing so causes errors in the subset() case.
return wrapArrayBufferView(args, type, array, arrayType, false);
}
// Supported constructors:
// WebGL<T>Array(n) where n is an integer:
// -- create an empty array of n elements
// WebGL<T>Array(arr) where arr is an array:
// -- create a WebGL<T>Array containing the contents of "arr"
// WebGL<T>Array(buf, offset, length)
// -- create a WebGL<T>Array pointing to the ArrayBuffer
// "buf", starting at the specified offset, for the given
// length
if (args[0]->IsNull()) {
// Invalid first argument
return throwTypeError(0, args.GetIsolate());
}
// See whether the first argument is a ArrayBuffer.
if (V8ArrayBuffer::HasInstance(args[0]))
return constructWebGLArrayWithArrayBufferArgument<ArrayClass, ElementType>(args, type, arrayType, true);
// See whether the first argument is the same type as impl. In that case,
// we can simply memcpy data from source to impl.
if (JavaScriptWrapperArrayType::HasInstance(args[0])) {
ArrayClass* source = JavaScriptWrapperArrayType::toNative(args[0]->ToObject());
uint32_t length = source->length();
RefPtr<ArrayClass> array = ArrayClass::createUninitialized(length);
if (!array.get())
return throwError(RangeError, tooLargeSize, args.GetIsolate());
array->buffer()->setDeallocationObserver(V8ArrayBufferDeallocationObserver::instance());
v8::V8::AdjustAmountOfExternalAllocatedMemory(array->byteLength());
memcpy(array->baseAddress(), source->baseAddress(), length * sizeof(ElementType));
return wrapArrayBufferView(args, type, array, arrayType, true);
}
uint32_t len = 0;
v8::Handle<v8::Object> srcArray;
bool doInstantiation = false;
if (args[0]->IsObject()) {
srcArray = args[0]->ToObject();
if (srcArray.IsEmpty())
return throwTypeError("Could not convert argument 0 to an array", args.GetIsolate());
len = toUInt32(srcArray->Get(v8::String::New("length")));
doInstantiation = true;
} else {
bool ok = false;
int32_t tempLength = toInt32(args[0], ok); // NaN/+inf/-inf returns 0, this is intended by WebIDL
if (ok && tempLength >= 0) {
len = static_cast<uint32_t>(tempLength);
doInstantiation = true;
}
}
RefPtr<ArrayClass> array;
if (doInstantiation) {
if (srcArray.IsEmpty())
array = ArrayClass::create(len);
else
array = ArrayClass::createUninitialized(len);
}
if (!array.get())
return throwError(RangeError, tooLargeSize, args.GetIsolate());
if (doInstantiation) {
array->buffer()->setDeallocationObserver(V8ArrayBufferDeallocationObserver::instance());
v8::V8::AdjustAmountOfExternalAllocatedMemory(array->byteLength());
}
// Transform the holder into a wrapper object for the array.
V8DOMWrapper::setDOMWrapper(args.Holder(), type, array.get());
args.Holder()->SetIndexedPropertiesToExternalArrayData(array.get()->baseAddress(), arrayType, array.get()->length());
if (!srcArray.IsEmpty()) {
bool copied = copyElements(args.Holder(), srcArray, len, 0, args.GetIsolate());
if (!copied) {
for (unsigned i = 0; i < len; i++)
array->set(i, srcArray->Get(i)->NumberValue());
}
}
v8::Handle<v8::Object> wrapper = args.Holder();
v8::Persistent<v8::Object> wrapperHandle = V8DOMWrapper::setJSWrapperForDOMObject(array.release(), wrapper);
wrapperHandle.MarkIndependent();
return wrapper;
}
template <class CPlusPlusArrayType, class JavaScriptWrapperArrayType>
v8::Handle<v8::Value> setWebGLArrayHelper(const v8::Arguments& args)
{
if (args.Length() < 1)
return throwNotEnoughArgumentsError(args.GetIsolate());
CPlusPlusArrayType* impl = JavaScriptWrapperArrayType::toNative(args.Holder());
if (JavaScriptWrapperArrayType::HasInstance(args[0])) {
// void set(in WebGL<T>Array array, [Optional] in unsigned long offset);
CPlusPlusArrayType* src = JavaScriptWrapperArrayType::toNative(args[0]->ToObject());
uint32_t offset = 0;
if (args.Length() == 2)
offset = toUInt32(args[1]);
if (!impl->set(src, offset))
return throwError(RangeError, outOfRangeLengthAndOffset, args.GetIsolate());
return v8::Undefined();
}
if (args[0]->IsObject()) {
// void set(in sequence<long> array, [Optional] in unsigned long offset);
v8::Local<v8::Object> array = args[0]->ToObject();
uint32_t offset = 0;
if (args.Length() == 2)
offset = toUInt32(args[1]);
uint32_t length = toUInt32(array->Get(v8::String::New("length")));
if (!impl->checkInboundData(offset, length))
return throwError(RangeError, outOfRangeLengthAndOffset, args.GetIsolate());
bool copied = copyElements(args.Holder(), array, length, offset, args.GetIsolate());
if (!copied) {
for (uint32_t i = 0; i < length; i++)
impl->set(offset + i, array->Get(i)->NumberValue());
}
return v8::Undefined();
}
return throwTypeError("Invalid argument", args.GetIsolate());
}
}
#endif // V8ArrayBufferViewCustom_h
|
