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 v8::Handle<v8::Value> V8WebGLArrayBuffer::constructorCallback(const v8::Arguments& args) 44 { 45 INC_STATS("DOM.WebGLArrayBuffer.Constructor"); 46 47 if (!args.IsConstructCall()) 48 return throwError("DOM object constructor cannot be called as a function."); 49 50 // If we return a previously constructed WebGLArrayBuffer, 51 // e.g. from the call to WebGLArray.buffer, this code is called 52 // with a zero-length argument list. The V8DOMWrapper will then 53 // set the internal pointer in the newly-created object. 54 // Unfortunately it doesn't look like it's possible to distinguish 55 // between this case and that where the user calls "new 56 // WebGLArrayBuffer()" from JavaScript. To guard against problems, 57 // we always create at least a zero-length WebGLArrayBuffer, even 58 // if it is immediately overwritten by the V8DOMWrapper. 59 60 // Supported constructors: 61 // WebGLArrayBuffer(n) where n is an integer: 62 // -- create an empty buffer of n bytes 63 64 int argLen = args.Length(); 65 if (argLen > 1) 66 return throwError("Wrong number of arguments specified to constructor (requires 1)"); 67 68 int len = 0; 69 if (argLen > 0) { 70 if (!args[0]->IsInt32()) 71 return throwError("Argument to WebGLArrayBuffer constructor was not an integer"); 72 len = toInt32(args[0]); 73 } 74 75 RefPtr<WebGLArrayBuffer> buffer = WebGLArrayBuffer::create(len); 76 // Transform the holder into a wrapper object for the array. 77 V8DOMWrapper::setDOMWrapper(args.Holder(), V8ClassIndex::ToInt(V8ClassIndex::WEBGLARRAYBUFFER), buffer.get()); 78 return toV8(buffer.release(), args.Holder()); 79 } 80 81 } // namespace WebCore 82 83 #endif // ENABLE(3D_CANVAS) 84
