CSSCanvasValue.cpp [plain text]
#include "config.h"
#include "CSSCanvasValue.h"
#include "ImageBuffer.h"
#include "RenderElement.h"
namespace WebCore {
CSSCanvasValue::~CSSCanvasValue()
{
if (m_element)
m_element->removeObserver(m_canvasObserver);
}
String CSSCanvasValue::customCSSText() const
{
return makeString("-webkit-canvas(", m_name, ')');
}
void CSSCanvasValue::canvasChanged(HTMLCanvasElement&, const FloatRect& changedRect)
{
IntRect imageChangeRect = enclosingIntRect(changedRect);
for (auto it = clients().begin(), end = clients().end(); it != end; ++it)
it->key->imageChanged(static_cast<WrappedImagePtr>(this), &imageChangeRect);
}
void CSSCanvasValue::canvasResized(HTMLCanvasElement&)
{
for (auto it = clients().begin(), end = clients().end(); it != end; ++it)
it->key->imageChanged(static_cast<WrappedImagePtr>(this));
}
void CSSCanvasValue::canvasDestroyed(HTMLCanvasElement& element)
{
ASSERT_UNUSED(&element, &element == m_element);
m_element = nullptr;
}
FloatSize CSSCanvasValue::fixedSize(const RenderElement* renderer)
{
if (HTMLCanvasElement* elt = element(renderer->document()))
return FloatSize(elt->width(), elt->height());
return FloatSize();
}
HTMLCanvasElement* CSSCanvasValue::element(Document& document)
{
if (!m_element) {
m_element = document.getCSSCanvasElement(m_name);
if (!m_element)
return nullptr;
m_element->addObserver(m_canvasObserver);
}
return m_element;
}
PassRefPtr<Image> CSSCanvasValue::image(RenderElement* renderer, const FloatSize& )
{
ASSERT(clients().contains(renderer));
HTMLCanvasElement* element = this->element(renderer->document());
if (!element || !element->buffer())
return 0;
return element->copiedImage();
}
bool CSSCanvasValue::equals(const CSSCanvasValue& other) const
{
return m_name == other.m_name;
}
}