| /* |
| * 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 "bindings/v8/V8Binding.h" |
| #include "bindings/v8/V8ObjectConstructor.h" |
| #include "bindings/v8/custom/V8ArrayBufferCustom.h" |
| #include "core/dom/ExceptionCode.h" |
| |
| #include "wtf/ArrayBuffer.h" |
| |
| namespace WebCore { |
| |
| const char tooLargeSize[] = "Size is too large (or is negative)."; |
| 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 JavaScriptWrapperArrayType, class ArrayClass> |
| void wrapArrayBufferView(const v8::FunctionCallbackInfo<v8::Value>& args, WrapperTypeInfo* type, ArrayClass array, v8::ExternalArrayType arrayType, bool hasIndexer) |
| { |
| // Transform the holder into a wrapper object for the array. |
| ASSERT(!hasIndexer || static_cast<int32_t>(array.get()->length()) >= 0); |
| if (hasIndexer) |
| args.Holder()->SetIndexedPropertiesToExternalArrayData(array.get()->baseAddress(), arrayType, array.get()->length()); |
| v8::Handle<v8::Object> wrapper = args.Holder(); |
| V8DOMWrapper::associateObjectWithWrapper<JavaScriptWrapperArrayType>(array.release(), type, wrapper, args.GetIsolate(), WrapperConfiguration::Independent); |
| args.GetReturnValue().Set(wrapper); |
| } |
| |
| // Template function used by the ArrayBufferView*Constructor callbacks. |
| template<class ArrayClass, class ElementType, class JavaScriptWrapperArrayType> |
| void constructWebGLArrayWithArrayBufferArgument(const v8::FunctionCallbackInfo<v8::Value>& args, WrapperTypeInfo* type, v8::ExternalArrayType arrayType, bool hasIndexer) |
| { |
| ArrayBuffer* buf = V8ArrayBuffer::toNative(args[0]->ToObject()); |
| if (!buf) { |
| throwTypeError("Could not convert argument 0 to a ArrayBuffer", args.GetIsolate()); |
| return; |
| } |
| bool ok; |
| uint32_t offset = 0; |
| int argLen = args.Length(); |
| if (argLen > 1) { |
| offset = toUInt32(args[1], ok); |
| if (!ok) { |
| throwTypeError("Could not convert argument 1 to a number", args.GetIsolate()); |
| return; |
| } |
| } |
| uint32_t length = 0; |
| if (argLen > 2) { |
| length = toUInt32(args[2], ok); |
| if (!ok) { |
| throwTypeError("Could not convert argument 2 to a number", args.GetIsolate()); |
| return; |
| } |
| } else { |
| if ((buf->byteLength() - offset) % sizeof(ElementType)) { |
| throwError(v8RangeError, "ArrayBuffer length minus the byteOffset is not a multiple of the element size.", args.GetIsolate()); |
| return; |
| } |
| length = (buf->byteLength() - offset) / sizeof(ElementType); |
| } |
| |
| if (static_cast<int32_t>(length) < 0) { |
| throwError(v8RangeError, tooLargeSize, args.GetIsolate()); |
| return; |
| } |
| |
| RefPtr<ArrayClass> array = ArrayClass::create(buf, offset, length); |
| if (!array) { |
| throwError(v8RangeError, tooLargeSize, args.GetIsolate()); |
| return; |
| } |
| |
| wrapArrayBufferView<JavaScriptWrapperArrayType>(args, type, array, arrayType, hasIndexer); |
| } |
| |
| // Template function used by the ArrayBufferView*Constructor callbacks. |
| template<class ArrayClass, class JavaScriptWrapperArrayType, class ElementType> |
| void constructWebGLArray(const v8::FunctionCallbackInfo<v8::Value>& args, WrapperTypeInfo* type, v8::ExternalArrayType arrayType) |
| { |
| if (!args.IsConstructCall()) { |
| throwTypeError("DOM object constructor cannot be called as a function.", args.GetIsolate()); |
| return; |
| } |
| |
| if (ConstructorMode::current() == ConstructorMode::WrapExistingObject) { |
| args.GetReturnValue().Set(args.Holder()); |
| return; |
| } |
| |
| 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. |
| wrapArrayBufferView<JavaScriptWrapperArrayType>(args, type, array, arrayType, false); |
| return; |
| } |
| |
| // 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 |
| throwTypeError(0, args.GetIsolate()); |
| return; |
| } |
| |
| // See whether the first argument is a ArrayBuffer. |
| if (V8ArrayBuffer::HasInstance(args[0], args.GetIsolate(), worldType(args.GetIsolate()))) { |
| constructWebGLArrayWithArrayBufferArgument<ArrayClass, ElementType, JavaScriptWrapperArrayType>(args, type, arrayType, true); |
| return; |
| } |
| |
| // 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], args.GetIsolate(), worldType(args.GetIsolate()))) { |
| ArrayClass* source = JavaScriptWrapperArrayType::toNative(args[0]->ToObject()); |
| uint32_t length = source->length(); |
| |
| if (static_cast<int32_t>(length) < 0) { |
| throwError(v8RangeError, tooLargeSize, args.GetIsolate()); |
| return; |
| } |
| |
| RefPtr<ArrayClass> array = ArrayClass::createUninitialized(length); |
| if (!array.get()) { |
| throwError(v8RangeError, tooLargeSize, args.GetIsolate()); |
| return; |
| } |
| |
| array->buffer()->setDeallocationObserver(V8ArrayBufferDeallocationObserver::instance()); |
| v8::V8::AdjustAmountOfExternalAllocatedMemory(array->byteLength()); |
| |
| memcpy(array->baseAddress(), source->baseAddress(), length * sizeof(ElementType)); |
| |
| wrapArrayBufferView<JavaScriptWrapperArrayType>(args, type, array, arrayType, true); |
| return; |
| } |
| |
| uint32_t len = 0; |
| v8::Handle<v8::Object> srcArray; |
| bool doInstantiation = false; |
| |
| if (args[0]->IsObject()) { |
| srcArray = args[0]->ToObject(); |
| if (srcArray.IsEmpty()) { |
| throwTypeError("Could not convert argument 0 to an array", args.GetIsolate()); |
| return; |
| } |
| v8::Local<v8::Value> val = srcArray->Get(v8::String::NewSymbol("length")); |
| if (val.IsEmpty()) { |
| // Exception thrown during fetch of length property. |
| return; |
| } |
| len = toUInt32(val); |
| 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; |
| } |
| } |
| |
| if (static_cast<int32_t>(len) < 0) { |
| throwError(v8RangeError, tooLargeSize, args.GetIsolate()); |
| return; |
| } |
| |
| RefPtr<ArrayClass> array; |
| if (doInstantiation) { |
| if (srcArray.IsEmpty()) |
| array = ArrayClass::create(len); |
| else |
| array = ArrayClass::createUninitialized(len); |
| } |
| |
| if (!array.get()) { |
| throwError(v8RangeError, tooLargeSize, args.GetIsolate()); |
| return; |
| } |
| |
| if (doInstantiation) { |
| array->buffer()->setDeallocationObserver(V8ArrayBufferDeallocationObserver::instance()); |
| v8::V8::AdjustAmountOfExternalAllocatedMemory(array->byteLength()); |
| } |
| |
| |
| // Transform the holder into a wrapper object for the array. |
| 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++) { |
| v8::Local<v8::Value> val = srcArray->Get(i); |
| if (val.IsEmpty()) { |
| // Exception thrown during fetch. |
| return; |
| } |
| array->set(i, val->NumberValue()); |
| } |
| } |
| } |
| |
| v8::Handle<v8::Object> wrapper = args.Holder(); |
| V8DOMWrapper::associateObjectWithWrapper<JavaScriptWrapperArrayType>(array.release(), type, wrapper, args.GetIsolate(), WrapperConfiguration::Independent); |
| args.GetReturnValue().Set(wrapper); |
| } |
| |
| template <class CPlusPlusArrayType, class JavaScriptWrapperArrayType> |
| void setWebGLArrayHelper(const v8::FunctionCallbackInfo<v8::Value>& args) |
| { |
| if (args.Length() < 1) { |
| throwNotEnoughArgumentsError(args.GetIsolate()); |
| return; |
| } |
| |
| CPlusPlusArrayType* impl = JavaScriptWrapperArrayType::toNative(args.Holder()); |
| |
| if (JavaScriptWrapperArrayType::HasInstance(args[0], args.GetIsolate(), worldType(args.GetIsolate()))) { |
| // 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)) { |
| throwError(v8RangeError, outOfRangeLengthAndOffset, args.GetIsolate()); |
| return; |
| } |
| return; |
| } |
| |
| 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::NewSymbol("length"))); |
| if (!impl->checkInboundData(offset, length)) { |
| throwError(v8RangeError, outOfRangeLengthAndOffset, args.GetIsolate()); |
| return; |
| } |
| 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; |
| } |
| |
| throwTypeError("Invalid argument", args.GetIsolate()); |
| } |
| |
| } |
| |
| #endif // V8ArrayBufferViewCustom_h |
