#include "config.h"
#include "FEOffset.h"
#include "Filter.h"
#include "GraphicsContext.h"
#include "TextStream.h"
namespace WebCore {
FEOffset::FEOffset(Filter& filter, float dx, float dy)
: FilterEffect(filter)
, m_dx(dx)
, m_dy(dy)
{
}
Ref<FEOffset> FEOffset::create(Filter& filter, float dx, float dy)
{
return adoptRef(*new FEOffset(filter, 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::determineAbsolutePaintRect()
{
FloatRect paintRect = inputEffect(0)->absolutePaintRect();
Filter& filter = this->filter();
paintRect.move(filter.applyHorizontalScale(m_dx), filter.applyVerticalScale(m_dy));
if (clipsToBounds())
paintRect.intersect(maxEffectRect());
else
paintRect.unite(maxEffectRect());
setAbsolutePaintRect(enclosingIntRect(paintRect));
}
void FEOffset::platformApplySoftware()
{
FilterEffect* in = inputEffect(0);
ImageBuffer* resultImage = createImageBufferResult();
if (!resultImage)
return;
setIsAlphaImage(in->isAlphaImage());
FloatRect drawingRegion = drawingRegionOfInputImage(in->absolutePaintRect());
Filter& filter = this->filter();
drawingRegion.move(filter.applyHorizontalScale(m_dx), filter.applyVerticalScale(m_dy));
resultImage->context()->drawImageBuffer(in->asImageBuffer(), ColorSpaceDeviceRGB, drawingRegion);
}
void FEOffset::dump()
{
}
TextStream& FEOffset::externalRepresentation(TextStream& ts, int indent) const
{
writeIndent(ts, indent);
ts << "[feOffset";
FilterEffect::externalRepresentation(ts);
ts << " dx=\"" << dx() << "\" dy=\"" << dy() << "\"]\n";
inputEffect(0)->externalRepresentation(ts, indent + 1);
return ts;
}
}