ImageData* ImageData::create(const IntSize& size,
DOMUint8ClampedArray* byteArray) {
CheckedNumeric<int> dataSize = 4;
dataSize *= size.width();
dataSize *= size.height();
if (!dataSize.IsValid())
return nullptr;
if (dataSize.ValueOrDie() < 0 ||
static_cast<unsigned>(dataSize.ValueOrDie()) > byteArray->length())
return nullptr;
return new ImageData(size, byteArray);
}
ImageData* ImageData::create(const IntSize& size) {
CheckedNumeric<int> dataSize = 4;
dataSize *= size.width();
dataSize *= size.height();
if (!dataSize.IsValid() || dataSize.ValueOrDie() < 0)
return nullptr;
DOMUint8ClampedArray* byteArray =
DOMUint8ClampedArray::createOrNull(dataSize.ValueOrDie());
if (!byteArray)
return nullptr;
return new ImageData(size, byteArray);
}
ImageData* ImageData::create(unsigned width,
unsigned height,
ExceptionState& exceptionState) {
if (!width || !height) {
exceptionState.throwDOMException(
IndexSizeError, String::format("The source %s is zero or not a number.",
width ? "height" : "width"));
return nullptr;
}
CheckedNumeric<unsigned> dataSize = 4;
dataSize *= width;
dataSize *= height;
if (!dataSize.IsValid() || static_cast<int>(width) < 0 ||
static_cast<int>(height) < 0) {
exceptionState.throwDOMException(
IndexSizeError,
"The requested image size exceeds the supported range.");
return nullptr;
}
DOMUint8ClampedArray* byteArray =
DOMUint8ClampedArray::createOrNull(dataSize.ValueOrDie());
if (!byteArray) {
exceptionState.throwDOMException(V8Error,
"Out of memory at ImageData creation");
return nullptr;
}
return new ImageData(IntSize(width, height), byteArray);
}