#include "config.h"
#if ENABLE(FILTERS)
#include "FEOffset.h"
#include "Filter.h"
#include "GraphicsContext.h"
#include "RenderTreeAsText.h"
#include "TextStream.h"
namespace WebCore {
FEOffset::FEOffset(Filter* filter, float dx, float dy)
: FilterEffect(filter)
, m_dx(dx)
, m_dy(dy)
{
}
PassRefPtr<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));
paintRect.intersect(maxEffectRect());
setAbsolutePaintRect(enclosingIntRect(paintRect));
}
void FEOffset::apply()
{
if (hasResult())
return;
FilterEffect* in = inputEffect(0);
in->apply();
if (!in->hasResult())
return;
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;
}
}
#endif // ENABLE(FILTERS)