/platform/external/webkit/WebCore/bindings/v8/custom/V8WebGLArrayCustom.h
https://github.com/aharish/totoro-gb-opensource-update2 · C Header · 219 lines · 142 code · 25 blank · 52 comment · 40 complexity · 44c6abb2301712e64198b2164d665f95 MD5 · raw file
- /*
- * 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 "WebGLArrayBuffer.h"
- #include "V8Binding.h"
- #include "V8WebGLArrayBuffer.h"
- #include "V8Proxy.h"
- namespace WebCore {
- // Template function used by the WebGLArray*Constructor callbacks.
- template<class ArrayClass>
- v8::Handle<v8::Value> constructWebGLArray(const v8::Arguments& args,
- int classIndex)
- {
- 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
- // WebGLArray, 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 WebGLArrayBuffer
- // "buf", starting at the specified offset, for the given
- // length
- // See whether the first argument is a WebGLArrayBuffer.
- if (V8WebGLArrayBuffer::HasInstance(args[0])) {
- if (argLen > 3)
- return throwError("Wrong number of arguments to new WebGL<T>Array(WebGLArrayBuffer, int, int)");
- WebGLArrayBuffer* buf = V8WebGLArrayBuffer::toNative(args[0]->ToObject());
- if (buf == NULL)
- return throwError("Could not convert argument 0 to a WebGLArrayBuffer");
- bool ok;
- int offset = 0;
- if (argLen > 1) {
- offset = toInt32(args[1], ok);
- if (!ok)
- return throwError("Could not convert argument 1 to an integer");
- }
- int length = buf->byteLength() - offset;
- if (argLen > 2) {
- length = toInt32(args[2], ok);
- if (!ok)
- return throwError("Could not convert argument 2 to an integer");
- }
- if (length < 0)
- return throwError("Length / offset out of range");
- RefPtr<ArrayClass> array = ArrayClass::create(buf, offset, length);
- if (array == NULL)
- return throwError("Invalid arguments to new WebGL<T>Array(WebGLArrayBuffer, int, int)");
- // Transform the holder into a wrapper object for the array.
- V8DOMWrapper::setDOMWrapper(args.Holder(), classIndex, array.get());
- V8DOMWrapper::setIndexedPropertiesToExternalArray(args.Holder(),
- classIndex,
- array.get()->baseAddress(),
- array.get()->length());
- return toV8(array.release(), args.Holder());
- }
- int len = 0;
- v8::Handle<v8::Object> srcArray;
- if (argLen != 1)
- return throwError("Wrong number of arguments to new WebGL<T>Array(int / array)");
- if (args[0]->IsInt32()) {
- len = toInt32(args[0]);
- } else if (args[0]->IsObject()) {
- srcArray = args[0]->ToObject();
- if (srcArray.IsEmpty())
- return throwError("Could not convert argument 0 to an object");
- len = toInt32(srcArray->Get(v8::String::New("length")));
- } else
- return throwError("Could not convert argument 0 to either an int32 or an object");
- RefPtr<ArrayClass> array = ArrayClass::create(len);
- if (!srcArray.IsEmpty()) {
- // Need to copy the incoming array into the newly created WebGLArray.
- for (int i = 0; i < len; i++) {
- v8::Local<v8::Value> val = srcArray->Get(v8::Integer::New(i));
- array->set(i, val->NumberValue());
- }
- }
- // Transform the holder into a wrapper object for the array.
- V8DOMWrapper::setDOMWrapper(args.Holder(), classIndex, array.get());
- V8DOMWrapper::setIndexedPropertiesToExternalArray(args.Holder(),
- classIndex,
- array.get()->baseAddress(),
- array.get()->length());
- return toV8(array.release(), args.Holder());
- }
- template <class T, typename ElementType>
- v8::Handle<v8::Value> getWebGLArrayElement(const v8::Arguments& args,
- V8ClassIndex::V8WrapperType wrapperType)
- {
- if (args.Length() != 1) {
- V8Proxy::setDOMException(SYNTAX_ERR);
- return notHandledByInterceptor();
- }
- bool ok;
- uint32_t index = toInt32(args[0], ok);
- if (!ok) {
- V8Proxy::setDOMException(SYNTAX_ERR);
- return notHandledByInterceptor();
- }
- T* array = reinterpret_cast<T*>(args.Holder()->GetPointerFromInternalField(v8DOMWrapperObjectIndex));
- if (index >= array->length())
- return v8::Undefined();
- ElementType result;
- if (!array->get(index, result))
- return v8::Undefined();
- return v8::Number::New(result);
- }
- template <class T>
- v8::Handle<v8::Value> setWebGLArrayFromArray(T* webGLArray, const v8::Arguments& args)
- {
- 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 = toInt32(args[1]);
- uint32_t length = toInt32(array->Get(v8::String::New("length")));
- if (offset + length > webGLArray->length())
- V8Proxy::setDOMException(INDEX_SIZE_ERR);
- else
- for (uint32_t i = 0; i < length; i++)
- webGLArray->set(offset + i, array->Get(v8::Integer::New(i))->NumberValue());
- }
- return v8::Undefined();
- }
- template <class CPlusPlusArrayType, class JavaScriptWrapperArrayType>
- v8::Handle<v8::Value> setWebGLArray(const v8::Arguments& args,
- V8ClassIndex::V8WrapperType wrapperType)
- {
- if (args.Length() < 1 || args.Length() > 2) {
- V8Proxy::setDOMException(SYNTAX_ERR);
- return notHandledByInterceptor();
- }
- CPlusPlusArrayType* array = JavaScriptWrapperArrayType::toNative(args.Holder());
- if (args.Length() == 2 && args[0]->IsInt32()) {
- // void set(in unsigned long index, in {long|float} value);
- uint32_t index = toInt32(args[0]);
- array->set(index, args[1]->NumberValue());
- return v8::Undefined();
- }
- 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 = toInt32(args[1]);
- ExceptionCode ec = 0;
- array->set(src, offset, ec);
- V8Proxy::setDOMException(ec);
- return v8::Undefined();
- }
- return setWebGLArrayFromArray(array, args);
- }
- }
- #endif // ENABLE(3D_CANVAS)