#ifndef FEGaussianBlur_h
#define FEGaussianBlur_h
#if ENABLE(FILTERS)
#include "FilterEffect.h"
#include "Filter.h"
namespace WebCore {
class FEGaussianBlur : public FilterEffect {
public:
static PassRefPtr<FEGaussianBlur> create(Filter*, float, float);
float stdDeviationX() const;
void setStdDeviationX(float);
float stdDeviationY() const;
void setStdDeviationY(float);
static float calculateStdDeviation(float);
virtual void platformApplySoftware();
virtual void dump();
virtual void determineAbsolutePaintRect();
static void calculateKernelSize(Filter*, unsigned& kernelSizeX, unsigned& kernelSizeY, float stdX, float stdY);
static void calculateUnscaledKernelSize(unsigned& kernelSizeX, unsigned& kernelSizeY, float stdX, float stdY);
virtual TextStream& externalRepresentation(TextStream&, int indention) const;
private:
static const int s_minimalRectDimension = 100 * 100;
template<typename Type>
friend class ParallelJobs;
struct PlatformApplyParameters {
FEGaussianBlur* filter;
RefPtr<Uint8ClampedArray> srcPixelArray;
RefPtr<Uint8ClampedArray> dstPixelArray;
int width;
int height;
unsigned kernelSizeX;
unsigned kernelSizeY;
};
static void platformApplyWorker(PlatformApplyParameters*);
FEGaussianBlur(Filter*, float, float);
static inline void kernelPosition(int boxBlur, unsigned& std, int& dLeft, int& dRight);
inline void platformApply(Uint8ClampedArray* srcPixelArray, Uint8ClampedArray* tmpPixelArray, unsigned kernelSizeX, unsigned kernelSizeY, IntSize& paintSize);
inline void platformApplyGeneric(Uint8ClampedArray* srcPixelArray, Uint8ClampedArray* tmpPixelArray, unsigned kernelSizeX, unsigned kernelSizeY, IntSize& paintSize);
inline void platformApplyNeon(Uint8ClampedArray* srcPixelArray, Uint8ClampedArray* tmpPixelArray, unsigned kernelSizeX, unsigned kernelSizeY, IntSize& paintSize);
#if USE(SKIA)
virtual bool platformApplySkia();
#endif
float m_stdX;
float m_stdY;
};
inline void FEGaussianBlur::kernelPosition(int boxBlur, unsigned& std, int& dLeft, int& dRight)
{
switch (boxBlur) {
case 0:
if (!(std % 2)) {
dLeft = std / 2 - 1;
dRight = std - dLeft;
} else {
dLeft = std / 2;
dRight = std - dLeft;
}
break;
case 1:
if (!(std % 2)) {
dLeft++;
dRight--;
}
break;
case 2:
if (!(std % 2)) {
dRight++;
std++;
}
break;
}
}
}
#endif // ENABLE(FILTERS)
#endif // FEGaussianBlur_h