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/*
* 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.
*/
#include "config.h"
#if ENABLE(3D_CANVAS)
#include "ArrayBuffer.h"
#include "V8Binding.h"
#include "V8ArrayBuffer.h"
#include "V8Proxy.h"
namespace WebCore {
// 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 == 0) {
// This happens when we return a previously constructed
// ArrayBufferView, e.g. from the call to WebGL<T>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 WebGL<T>Array()" from JavaScript.
return 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
// See whether the first argument is a ArrayBuffer.
if (V8ArrayBuffer::HasInstance(args[0])) {
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;
if (argLen > 1) {
offset = toUInt32(args[1], ok);
if (!ok)
return throwError("Could not convert argument 1 to a number");
}
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)
return throwError("Out-of-range offset and/or length");
// 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());
}
uint32_t len = 0;
v8::Handle<v8::Object> srcArray;
if (args[0]->IsInt32()) {
len = toUInt32(args[0]);
} else 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")));
} else
return throwError("Could not convert argument 0 to either a number or an array");
RefPtr<ArrayClass> array = ArrayClass::create(len);
if (!array.get()) {
V8Proxy::setDOMException(INDEX_SIZE_ERR);
return v8::Undefined();
}
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)
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