This source file includes following definitions.
- create
- create
- create
- create
- m_data
- m_data
#include "config.h"
#include "core/html/ImageData.h"
#include "RuntimeEnabledFeatures.h"
#include "bindings/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
namespace WebCore {
PassRefPtrWillBeRawPtr<ImageData> ImageData::create(const IntSize& size)
{
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= size.width();
dataSize *= size.height();
if (dataSize.hasOverflowed())
return nullptr;
return adoptRefWillBeNoop(new ImageData(size));
}
PassRefPtrWillBeRawPtr<ImageData> ImageData::create(const IntSize& size, PassRefPtr<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 adoptRefWillBeNoop(new ImageData(size, byteArray));
}
PassRefPtrWillBeRawPtr<ImageData> ImageData::create(unsigned width, unsigned height, ExceptionState& exceptionState)
{
if (!RuntimeEnabledFeatures::imageDataConstructorEnabled()) {
exceptionState.throwTypeError("Illegal constructor");
return nullptr;
}
if (!width || !height) {
exceptionState.throwDOMException(IndexSizeError, String::format("The source %s is zero or not a number.", width ? "height" : "width"));
return nullptr;
}
Checked<unsigned, RecordOverflow> dataSize = 4;
dataSize *= width;
dataSize *= height;
if (dataSize.hasOverflowed()) {
exceptionState.throwDOMException(IndexSizeError, "The requested image size exceeds the supported range.");
return nullptr;
}
RefPtrWillBeRawPtr<ImageData> imageData = adoptRefWillBeNoop(new ImageData(IntSize(width, height)));
imageData->data()->zeroFill();
return imageData.release();
}
PassRefPtrWillBeRawPtr<ImageData> ImageData::create(Uint8ClampedArray* data, unsigned width, unsigned height, ExceptionState& exceptionState)
{
if (!RuntimeEnabledFeatures::imageDataConstructorEnabled()) {
exceptionState.throwTypeError("Illegal constructor");
return nullptr;
}
if (!data) {
exceptionState.throwTypeError("Expected a Uint8ClampedArray as first argument.");
return nullptr;
}
if (!width) {
exceptionState.throwDOMException(IndexSizeError, "The source width is zero or not a number.");
return nullptr;
}
unsigned length = data->length();
if (!length) {
exceptionState.throwDOMException(IndexSizeError, "The input data has a zero byte length.");
return nullptr;
}
if (length % 4) {
exceptionState.throwDOMException(IndexSizeError, "The input data byte length is not a multiple of 4.");
return nullptr;
}
length /= 4;
if (length % width) {
exceptionState.throwDOMException(IndexSizeError, "The input data byte length is not a multiple of (4 * width).");
return nullptr;
}
if (!height) {
height = length / width;
} else if (height != length / width) {
exceptionState.throwDOMException(IndexSizeError, "The input data byte length is not equal to (4 * width * height).");
return nullptr;
}
return adoptRefWillBeNoop(new ImageData(IntSize(width, height), data));
}
ImageData::ImageData(const IntSize& size)
: m_size(size)
, m_data(Uint8ClampedArray::createUninitialized(size.width() * size.height() * 4))
{
ScriptWrappable::init(this);
}
ImageData::ImageData(const IntSize& size, PassRefPtr<Uint8ClampedArray> byteArray)
: m_size(size)
, m_data(byteArray)
{
ASSERT_WITH_SECURITY_IMPLICATION(static_cast<unsigned>(size.width() * size.height() * 4) <= m_data->length());
ScriptWrappable::init(this);
}
}