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Diffstat (limited to 'Source/WebCore/bindings/v8/custom/V8ArrayBufferViewCustom.h')
| -rw-r--r-- | Source/WebCore/bindings/v8/custom/V8ArrayBufferViewCustom.h | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/Source/WebCore/bindings/v8/custom/V8ArrayBufferViewCustom.h b/Source/WebCore/bindings/v8/custom/V8ArrayBufferViewCustom.h new file mode 100644 index 0000000..6881a01 --- /dev/null +++ b/Source/WebCore/bindings/v8/custom/V8ArrayBufferViewCustom.h @@ -0,0 +1,214 @@ +/* + * Copyright (C) 2009 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 + +#if ENABLE(3D_CANVAS) || ENABLE(BLOB) + +#include "ArrayBuffer.h" + +#include "V8ArrayBuffer.h" +#include "V8Binding.h" +#include "V8Proxy.h" + +namespace WebCore { + +// 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 throwError("Could not convert argument 0 to a ArrayBuffer"); + bool ok; + uint32_t offset = 0; + int argLen = args.Length(); + if (argLen > 1) { + offset = toUInt32(args[1], ok); + if (!ok) + return throwError("Could not convert argument 1 to a number"); + } + if ((buf->byteLength() - offset) % sizeof(ElementType)) + return throwError("ArrayBuffer length minus the byteOffset is not a multiple of the element size.", V8Proxy::RangeError); + uint32_t length = (buf->byteLength() - offset) / sizeof(ElementType); + if (argLen > 2) { + length = toUInt32(args[2], ok); + if (!ok) + return throwError("Could not convert argument 2 to a number"); + } + + RefPtr<ArrayClass> array = ArrayClass::create(buf, offset, length); + if (!array) { + V8Proxy::setDOMException(INDEX_SIZE_ERR); + return notHandledByInterceptor(); + } + // 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()); + return toV8(array.release(), args.Holder()); +} + +// Template function used by the ArrayBufferView*Constructor callbacks. +template<class ArrayClass, class ElementType> +v8::Handle<v8::Value> constructWebGLArray(const v8::Arguments& args, WrapperTypeInfo* type, v8::ExternalArrayType arrayType) +{ + if (!args.IsConstructCall()) + return throwError("DOM object constructor cannot be called as a function."); + + int argLen = args.Length(); + if (!argLen) { + // This happens when we return a previously constructed + // ArrayBufferView, e.g. from the call to <Type>Array.slice(). + // 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); + // Transform the holder into a wrapper object for the array. + V8DOMWrapper::setDOMWrapper(args.Holder(), type, array.get()); + // Do not call SetIndexedPropertiesToExternalArrayData on this + // object. Not only is there no point from a performance + // perspective, but doing so causes errors in the slice() case. + return toV8(array.release(), args.Holder()); + } + + // 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 + // FIXME: use forthcoming V8Proxy::throwTypeError(). + return V8Proxy::throwError(V8Proxy::TypeError, "Type error"); + } + + // See whether the first argument is a ArrayBuffer. + if (V8ArrayBuffer::HasInstance(args[0])) + return constructWebGLArrayWithArrayBufferArgument<ArrayClass, ElementType>(args, type, 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 throwError("Could not convert argument 0 to an array"); + 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) + array = ArrayClass::create(len); + if (!array.get()) + return throwError("ArrayBufferView size is not a small enough positive integer.", V8Proxy::RangeError); + + if (!srcArray.IsEmpty()) { + // Need to copy the incoming array into the newly created ArrayBufferView. + for (unsigned i = 0; i < len; i++) { + v8::Local<v8::Value> val = srcArray->Get(v8::Integer::NewFromUnsigned(i)); + array->set(i, val->NumberValue()); + } + } + + // 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()); + return toV8(array.release(), args.Holder()); +} + +template <class CPlusPlusArrayType, class JavaScriptWrapperArrayType> +v8::Handle<v8::Value> setWebGLArrayHelper(const v8::Arguments& args) +{ + if (args.Length() < 1) { + V8Proxy::setDOMException(SYNTAX_ERR); + return notHandledByInterceptor(); + } + + 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]); + ExceptionCode ec = 0; + impl->set(src, offset, ec); + V8Proxy::setDOMException(ec); + 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 (offset > impl->length() + || offset + length > impl->length() + || offset + length < offset) + // Out of range offset or overflow + V8Proxy::setDOMException(INDEX_SIZE_ERR); + else + for (uint32_t i = 0; i < length; i++) + impl->set(offset + i, array->Get(v8::Integer::NewFromUnsigned(i))->NumberValue()); + + return v8::Undefined(); + } + + V8Proxy::setDOMException(SYNTAX_ERR); + return notHandledByInterceptor(); +} + +} + +#endif // ENABLE(3D_CANVAS) + +#endif // V8ArrayBufferViewCustom_h |