#include "config.h"
#if ENABLE(SVG) && ENABLE(FILTERS)
#include "SVGFEOffset.h"
#include "Filter.h"
#include "GraphicsContext.h"
#include "SVGRenderTreeAsText.h"
namespace WebCore {
FEOffset::FEOffset(FilterEffect* in, const float& dx, const float& dy)
: FilterEffect()
, m_in(in)
, m_dx(dx)
, m_dy(dy)
{
}
PassRefPtr<FEOffset> FEOffset::create(FilterEffect* in, const float& dx, const float& dy)
{
return adoptRef(new FEOffset(in, dx, dy));
}
float FEOffset::dx() const
{
return m_dx;
}
void FEOffset::setDx(float dx)
{
m_dx = dx;
}
float FEOffset::dy() const
{
return m_dy;
}
void FEOffset::setDy(float dy)
{
m_dy = dy;
}
void FEOffset::apply(Filter* filter)
{
m_in->apply(filter);
if (!m_in->resultImage())
return;
GraphicsContext* filterContext = getEffectContext();
if (!filterContext)
return;
setIsAlphaImage(m_in->isAlphaImage());
FloatRect sourceImageRect = filter->sourceImageRect();
sourceImageRect.scale(filter->filterResolution().width(), filter->filterResolution().height());
if (filter->effectBoundingBoxMode()) {
m_dx *= sourceImageRect.width();
m_dy *= sourceImageRect.height();
}
m_dx *= filter->filterResolution().width();
m_dy *= filter->filterResolution().height();
FloatRect dstRect = FloatRect(m_dx + m_in->scaledSubRegion().x() - scaledSubRegion().x(),
m_dy + m_in->scaledSubRegion().y() - scaledSubRegion().y(),
m_in->scaledSubRegion().width(),
m_in->scaledSubRegion().height());
filterContext->drawImage(m_in->resultImage()->image(), DeviceColorSpace, dstRect);
}
void FEOffset::dump()
{
}
TextStream& FEOffset::externalRepresentation(TextStream& ts) const
{
ts << "[type=OFFSET] ";
FilterEffect::externalRepresentation(ts);
ts << " [dx=" << dx() << " dy=" << dy() << "]";
return ts;
}
}
#endif // ENABLE(SVG) && ENABLE(FILTERS)