CanvasRenderingContext.cpp [plain text]
#include "config.h"
#include "CanvasRenderingContext.h"
#include "CachedImage.h"
#include "CanvasPattern.h"
#include "HTMLCanvasElement.h"
#include "HTMLImageElement.h"
#include "HTMLVideoElement.h"
#include "KURL.h"
#include "SecurityOrigin.h"
namespace WebCore {
CanvasRenderingContext::CanvasRenderingContext(HTMLCanvasElement* canvas)
: m_canvas(canvas)
{
}
void CanvasRenderingContext::checkOrigin(const CanvasPattern* pattern)
{
if (canvas()->originClean() && pattern && !pattern->originClean())
canvas()->setOriginTainted();
}
void CanvasRenderingContext::checkOrigin(const HTMLCanvasElement* sourceCanvas)
{
if (canvas()->originClean() && sourceCanvas && !sourceCanvas->originClean())
canvas()->setOriginTainted();
}
void CanvasRenderingContext::checkOrigin(const HTMLImageElement* image)
{
if (!image || !canvas()->originClean())
return;
CachedImage* cachedImage = image->cachedImage();
checkOrigin(cachedImage->response().url());
if (canvas()->originClean() && !cachedImage->image()->hasSingleSecurityOrigin())
canvas()->setOriginTainted();
}
void CanvasRenderingContext::checkOrigin(const HTMLVideoElement* video)
{
#if ENABLE(VIDEO)
checkOrigin(KURL(KURL(), video->currentSrc()));
if (canvas()->originClean() && video && !video->hasSingleSecurityOrigin())
canvas()->setOriginTainted();
#endif
}
void CanvasRenderingContext::checkOrigin(const KURL& url)
{
if (!canvas()->originClean() || m_cleanOrigins.contains(url.string()))
return;
if (canvas()->securityOrigin().taintsCanvas(url))
canvas()->setOriginTainted();
else
m_cleanOrigins.add(url.string());
}
}