1 /*
2 * Copyright (C) 2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32
33 #if ENABLE(3D_CANVAS)
34
35 #include "WebGLArrayBuffer.h"
36
37 #include "V8Binding.h"
38 #include "V8WebGLArrayBuffer.h"
39 #include "V8Proxy.h"
40
41 namespace WebCore {
42
43 // Template function used by the WebGLArray*Constructor callbacks.
44 template<class ArrayClass>
constructWebGLArray(const v8::Arguments & args,int classIndex)45 v8::Handle<v8::Value> constructWebGLArray(const v8::Arguments& args,
46 int classIndex)
47 {
48 if (!args.IsConstructCall())
49 return throwError("DOM object constructor cannot be called as a function.");
50
51 int argLen = args.Length();
52 if (argLen == 0) {
53 // This happens when we return a previously constructed
54 // WebGLArray, e.g. from the call to WebGL<T>Array.slice().
55 // The V8DOMWrapper will set the internal pointer in the
56 // created object. Unfortunately it doesn't look like it's
57 // possible to distinguish between this case and that where
58 // the user calls "new WebGL<T>Array()" from JavaScript.
59 return args.Holder();
60 }
61
62 // Supported constructors:
63 // WebGL<T>Array(n) where n is an integer:
64 // -- create an empty array of n elements
65 // WebGL<T>Array(arr) where arr is an array:
66 // -- create a WebGL<T>Array containing the contents of "arr"
67 // WebGL<T>Array(buf, offset, length)
68 // -- create a WebGL<T>Array pointing to the WebGLArrayBuffer
69 // "buf", starting at the specified offset, for the given
70 // length
71
72 // See whether the first argument is a WebGLArrayBuffer.
73 if (V8WebGLArrayBuffer::HasInstance(args[0])) {
74 if (argLen > 3)
75 return throwError("Wrong number of arguments to new WebGL<T>Array(WebGLArrayBuffer, int, int)");
76
77 WebGLArrayBuffer* buf = V8WebGLArrayBuffer::toNative(args[0]->ToObject());
78 if (buf == NULL)
79 return throwError("Could not convert argument 0 to a WebGLArrayBuffer");
80 bool ok;
81 int offset = 0;
82 if (argLen > 1) {
83 offset = toInt32(args[1], ok);
84 if (!ok)
85 return throwError("Could not convert argument 1 to an integer");
86 }
87 int length = buf->byteLength() - offset;
88 if (argLen > 2) {
89 length = toInt32(args[2], ok);
90 if (!ok)
91 return throwError("Could not convert argument 2 to an integer");
92 }
93 if (length < 0)
94 return throwError("Length / offset out of range");
95
96 RefPtr<ArrayClass> array = ArrayClass::create(buf, offset, length);
97 if (array == NULL)
98 return throwError("Invalid arguments to new WebGL<T>Array(WebGLArrayBuffer, int, int)");
99 // Transform the holder into a wrapper object for the array.
100 V8DOMWrapper::setDOMWrapper(args.Holder(), classIndex, array.get());
101 V8DOMWrapper::setIndexedPropertiesToExternalArray(args.Holder(),
102 classIndex,
103 array.get()->baseAddress(),
104 array.get()->length());
105 return toV8(array.release(), args.Holder());
106 }
107
108 int len = 0;
109 v8::Handle<v8::Object> srcArray;
110 if (argLen != 1)
111 return throwError("Wrong number of arguments to new WebGL<T>Array(int / array)");
112
113 if (args[0]->IsInt32()) {
114 len = toInt32(args[0]);
115 } else if (args[0]->IsObject()) {
116 srcArray = args[0]->ToObject();
117 if (srcArray.IsEmpty())
118 return throwError("Could not convert argument 0 to an object");
119 len = toInt32(srcArray->Get(v8::String::New("length")));
120 } else
121 return throwError("Could not convert argument 0 to either an int32 or an object");
122
123 RefPtr<ArrayClass> array = ArrayClass::create(len);
124 if (!srcArray.IsEmpty()) {
125 // Need to copy the incoming array into the newly created WebGLArray.
126 for (int i = 0; i < len; i++) {
127 v8::Local<v8::Value> val = srcArray->Get(v8::Integer::New(i));
128 array->set(i, val->NumberValue());
129 }
130 }
131
132 // Transform the holder into a wrapper object for the array.
133 V8DOMWrapper::setDOMWrapper(args.Holder(), classIndex, array.get());
134 V8DOMWrapper::setIndexedPropertiesToExternalArray(args.Holder(),
135 classIndex,
136 array.get()->baseAddress(),
137 array.get()->length());
138 return toV8(array.release(), args.Holder());
139 }
140
141 template <class T, typename ElementType>
getWebGLArrayElement(const v8::Arguments & args,V8ClassIndex::V8WrapperType wrapperType)142 v8::Handle<v8::Value> getWebGLArrayElement(const v8::Arguments& args,
143 V8ClassIndex::V8WrapperType wrapperType)
144 {
145 if (args.Length() != 1) {
146 V8Proxy::setDOMException(SYNTAX_ERR);
147 return notHandledByInterceptor();
148 }
149 bool ok;
150 uint32_t index = toInt32(args[0], ok);
151 if (!ok) {
152 V8Proxy::setDOMException(SYNTAX_ERR);
153 return notHandledByInterceptor();
154 }
155 T* array = reinterpret_cast<T*>(args.Holder()->GetPointerFromInternalField(v8DOMWrapperObjectIndex));
156 if (index >= array->length())
157 return v8::Undefined();
158 ElementType result;
159 if (!array->get(index, result))
160 return v8::Undefined();
161 return v8::Number::New(result);
162 }
163
164 template <class T>
setWebGLArrayFromArray(T * webGLArray,const v8::Arguments & args)165 v8::Handle<v8::Value> setWebGLArrayFromArray(T* webGLArray, const v8::Arguments& args)
166 {
167 if (args[0]->IsObject()) {
168 // void set(in sequence<long> array, [Optional] in unsigned long offset);
169 v8::Local<v8::Object> array = args[0]->ToObject();
170 uint32_t offset = 0;
171 if (args.Length() == 2)
172 offset = toInt32(args[1]);
173 uint32_t length = toInt32(array->Get(v8::String::New("length")));
174 if (offset + length > webGLArray->length())
175 V8Proxy::setDOMException(INDEX_SIZE_ERR);
176 else
177 for (uint32_t i = 0; i < length; i++)
178 webGLArray->set(offset + i, array->Get(v8::Integer::New(i))->NumberValue());
179 }
180
181 return v8::Undefined();
182 }
183
184 template <class CPlusPlusArrayType, class JavaScriptWrapperArrayType>
setWebGLArray(const v8::Arguments & args,V8ClassIndex::V8WrapperType wrapperType)185 v8::Handle<v8::Value> setWebGLArray(const v8::Arguments& args,
186 V8ClassIndex::V8WrapperType wrapperType)
187 {
188 if (args.Length() < 1 || args.Length() > 2) {
189 V8Proxy::setDOMException(SYNTAX_ERR);
190 return notHandledByInterceptor();
191 }
192
193 CPlusPlusArrayType* array = JavaScriptWrapperArrayType::toNative(args.Holder());
194
195 if (args.Length() == 2 && args[0]->IsInt32()) {
196 // void set(in unsigned long index, in {long|float} value);
197 uint32_t index = toInt32(args[0]);
198 array->set(index, args[1]->NumberValue());
199 return v8::Undefined();
200 }
201
202 if (JavaScriptWrapperArrayType::HasInstance(args[0])) {
203 // void set(in WebGL<T>Array array, [Optional] in unsigned long offset);
204 CPlusPlusArrayType* src = JavaScriptWrapperArrayType::toNative(args[0]->ToObject());
205 uint32_t offset = 0;
206 if (args.Length() == 2)
207 offset = toInt32(args[1]);
208 ExceptionCode ec = 0;
209 array->set(src, offset, ec);
210 V8Proxy::setDOMException(ec);
211 return v8::Undefined();
212 }
213
214 return setWebGLArrayFromArray(array, args);
215 }
216
217 }
218
219 #endif // ENABLE(3D_CANVAS)
220