#include "config.h"
#include "ImageData.h"
#include <runtime/JSCInlines.h>
#include <runtime/TypedArrayInlines.h>
namespace WebCore {
ExceptionOr<Ref<ImageData>> ImageData::create(unsigned sw, unsigned sh)
{
if (!sw || !sh)
return Exception { IndexSizeError };
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= sw;
dataSize *= sh;
if (dataSize.hasOverflowed())
return Exception { RangeError, ASCIILiteral("Cannot allocate a buffer of this size") };
IntSize size(sw, sh);
auto data = adoptRef(*new ImageData(size));
data->data()->zeroFill();
return WTFMove(data);
}
RefPtr<ImageData> ImageData::create(const IntSize& size)
{
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= size.width();
dataSize *= size.height();
if (dataSize.hasOverflowed())
return nullptr;
return adoptRef(*new ImageData(size));
}
RefPtr<ImageData> ImageData::create(const IntSize& size, Ref<Uint8ClampedArray>&& byteArray)
{
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= size.width();
dataSize *= size.height();
if (dataSize.hasOverflowed())
return nullptr;
if (dataSize.unsafeGet() < 0 || static_cast<unsigned>(dataSize.unsafeGet()) > byteArray->length())
return nullptr;
return adoptRef(*new ImageData(size, WTFMove(byteArray)));
}
ExceptionOr<RefPtr<ImageData>> ImageData::create(Ref<Uint8ClampedArray>&& byteArray, unsigned sw, std::optional<unsigned> sh)
{
unsigned length = byteArray->length();
if (!length || length % 4)
return Exception { InvalidStateError, ASCIILiteral("Length is not a non-zero multiple of 4") };
ASSERT(length > 0);
length /= 4;
if (!sw || length % sw)
return Exception { IndexSizeError, ASCIILiteral("Length is not a multiple of sw") };
unsigned height = length / sw;
if (sh && sh.value() != height)
return Exception { IndexSizeError, ASCIILiteral("sh value is not equal to height") };
return create(IntSize(sw, height), WTFMove(byteArray));
}
ImageData::ImageData(const IntSize& size)
: m_size(size)
, m_data(Uint8ClampedArray::createUninitialized((size.area() * 4).unsafeGet()))
{
ASSERT(m_data);
}
ImageData::ImageData(const IntSize& size, Ref<Uint8ClampedArray>&& byteArray)
: m_size(size)
, m_data(WTFMove(byteArray))
{
ASSERT(m_data);
ASSERT_WITH_SECURITY_IMPLICATION(!m_data || (size.area() * 4).unsafeGet() <= m_data->length());
}
}